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REFERENCE TO COMPUTER APPENDIX
The disclosure of the invention includes a microfiche appendix containing source code for computer programs described herein. The appendix consists of one fiche (#1 of 1), with 53 frames.
A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or patent disclosure, as it
appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.
FIELD OF THE INVENTION
The present invention relates to the application of information and data storage and retrieval technology to molecular tracking and identification and to biological, chemical, immunological and biochemical assays.
BACKGROUND OF THE INVENTION
Automated identification of articles using bar codes in the availability of the integrated circuit technology and computing power at reasonable costs. Such codes are typically used to track and identify consumer goods and other articles of
manufacture. One of the first scanners capable of reading a bar code was installed at a supermarket in 1974, and by 1980 more than 90% of all grocery items carried a bar code by 1980. By December 1985, more than 12,000 grocery stores were equipped with
scanner checkout systems [See, e.g., Harmon et al. (1989) Reading Between the Lines-An Introduction to Bar Code Technology, Helmers Publishing, Inc. 1989]. Bar codes have also been used in other applications, including other inventory control systems
and for identification and characterization of responses to mass advertising efforts.
By electro-optically scanning the symbol on an item and generating a corresponding signal, it is possible in an associated computer whose memory has digitally stored therein the full range of items, to compare the signal derived from the scanned
symbol with the stored information. When a match is found, the identity of the item and associated information, such as, in the instance of consumer goods, its price. Thus computer technology is exploited to facilitate identification procedures using
machine-readable identifiers.
Bar codes are typically read using lasers that scan from left to right, right to left, or in both directions (or other directions) across a field of alternating dark bars and reflective spaces of varying widths. Multiples scans are typically
employed to minimize data errors. Because of the multiplicity of bars and spaces required for each alphanumeric character, bar codes generally require a relatively large space to convey a small amount of data. For instance, each character in the bar
code system known as Code 39 requires five bars and four spaces. A high density Code 39 field corresponds to only 9.4 characters per inch. Universal Product Codes (UPCs) are another common bar code used primarily in the retail grocery trade and contain
a relatively large number of bars and spaces which allow for error checking, parity checking and reduction of errors caused by manual scanning of articles in grocery stores. They accordingly require even larger space for conveyance of character
information. The Codabar code, which has been developed by Pitney Bowes and is used in retail price labeling systems and by Federal Express, is a self-checking code. Each character is represented by a stand-alone group of four bars and three
interleaving spaces. Federal Express uses an eleven digit Codabar symbol on each airbill to process more than 450,000 packages per night. Other codes use varying bar and space techniques to represent characters. Because of error checking requirements
and for other reasons, however, the space required to place a bar code on an article is relatively large.
In addition to the large surface area required for the series of bars and spaces that form a typical bar code symbol, the code must be placed on a background that has a high reflectance level. The high level of contrast, or reflectivity ratio,
between the dark bars and the reflective spaces, allows the optical sensor in the reader to discern clearly and dependably the transitions between the bars and spaces in the symbol:. Ideally, the printed bar should be observed as perfectly black and the
spaces should be perfectly reflective. Because those ideal conditions are seldom possible, the industry typically requires that labeling media reflect at least 70% of incident light energy. Surface reflectivity and thus quality of the media on which
the bar code is placed directly affects the successful use of the bar code on that media. Additionally, the media cannot be overly transparent or translucent, since those characteristics can attenuate reflected light. Accordingly, only limited types of
highly reflective media may be used for placement of bar codes. Space requirements for bar codes further include a "quiet zone" that surrounds the field of bars and spaces. In many codes, this quiet zone constitutes a border around the code symbol,
thus requiring even more space for the bar code.
Bar coding also requires very precise print methods. Assuming that the printing operation is capable of printing the required density to achieve the 70% reflectance ratio, careful attention must be paid to additional major factors that influence
the bar code effectiveness. Those include ink spread/shrinkage; ink voids/specks; ink smearing; non-uniformity of ink; bar/space width tolerances; edge roughness and similar factors that must be closely controlled to ensure that the symbol will be
easily scannable. In other words, the printer must pay careful attention to using paper or other media that displays the correct absorption properties properly inking the ribbon; carefully controlling hammer pressure; keeping the printhead and paper
clean; properly wetting the paper and curing the ink; and maintaining proper adjustment of the printhead control mechanism. These printing details create additional problems and expenses, particularly for placement of bar code symbols on smaller items
such as coupons and mail pieces. "Bar codes" containing an array of marks of any desired size and shape that are arranged in a reference context or frame of one or more columns and one or more rows, together with a reference marker and a reference cue
have also been developed [see, U.S. Pat. No. 5,128,528]. The number of rows corresponds to the number of characters contained in the symbology selected for the array. For example, an array that is capable of conveying all the letters of the English
language and ten numeral symbols could use 36 rows. The number of columns in the matrix could corresponds to the number of characters desired to be conveyed. The roles of the rows and columns in the reference frame may be reversed if desired. In the
preferred embodiment, each column contains one or more dots corresponding to the character which is desired to be conveyed in that column. The reference marker and reference cue may be formed of one shape, of too marks, or according to any other desired
arrangement that allows interpretation of the matrix at any desired attitude with respect to the imaging equipment. The reference cue may form a part of the reference marker, or an information dot, if desired.
Thus, there are numerous types of bar codes, codes and methodologies for use available. Bar coding and other coding technology, however, remains to be fully exploited in areas outside the consumer products domain.
Drug Discovery
Drug discovery relies on the ability to identify compounds that interact with a selected target, such as cells, an antibody, receptor, enzyme, transcription factor or the like. Traditional drug discovery relied on collections or "libraries"
obtained from proprietary databases of compounds accumulated over many years, natural products, fermentation broths, and rational drug design. Recent advances in molecular biology, chemistry and automation have resulted in the development of rapid, High
throughput screening (HTS) protocols to screen these collection. In connection with HTS, methods for generating molecular diversity and for detecting, identifying and quantifying biological or chemical material have been developed. These advances have
been facilitated by fundamental developments in chemistry, including the development of highly sensitive analytical methods, solid state chemical synthesis, and sensitive and specific biological assay systems.
Analyses of biological interactions and chemical reactions, however, require the use of labels or tags to track and identify the results of such analyses. Typically biological reactions, such as binding, catalytic, hybridization and signaling
reactions, are monitored by labels, such as radioactive, fluorescent, photoabsorptive, luminescent and other such labels, or by direct or indirect enzyme labels. Chemical reactions are also monitored by direct or indirect means, such as by linking the
reactions to a second reaction in which a colored, fluorescent, chemiluminescent or other such product results. These analytical methods, however, are often time consuming, tedious and, when practiced in vivo, invasive. In addition, each reaction is
typically measured individually, in a separate assay. There is, thus, a need to develop alternative and convenient methods for tracking and identifying analytes in biological interactions and the reactants and products of chemical reactions.
Combinatorial libraries
The provision and maintenance of compounds to support HTS have become critical. New and innovative methods for the lead generation and lead optimization have emerged to address this need for diversity. Among these methods is combinatorial
chemistry, which has become a powerful tool in drug discovery and materials science. Methods and strategies for generating diverse libraries, primarily peptide- and nucleotide-based oligomer libraries, have been developed using molecular biology methods
and/or simultaneous chemical synthesis methodologies [see, eq., Dower et al. (1991) Annu. Rep. Med. Chem. 26:271-280; Fodor et al. (1991) Science 251:767-773; Jung et al. (1992) Angew. Chem. Ind. Ed. Engl. 31:367-383; Zuckerman et al. (1992) Proc. Natl. Acad. Sci. USA 89:4505-4509; Scott et al. (1990) Science 249:386-390; Devlin et al. (1990) Science 249:404-406; Cwirla et al. (1990) Proc. Natl. Acad. Sci. USA 87:6378-6382; and Gallop et al. (1994) J. Medicinal Chemistry 37:1233-1251]. The
resulting combinatorial libraries potentially contain millions of pharmaceutically relevant compounds and that can be screened to identify compounds that exhibit a selected activity.
The libraries fall into roughly three categories: fusion-protein-displayed peptide libraries in which random peptides or proteins are presented on the surface of phage particles or proteins expressed from plasmids; support-bound synthetic
chemical libraries in which individual compounds or mixtures of compounds are presented on insoluble matrices, such as resin beads [see, e.g., Lam et al. (1991) Nature 354:82-84] and cotton supports [see, e.g., Eichler et al. (1993) Biochemistry
32:11035-11041]; and methods in which the compounds are used in solution [see, e.g., Houghten et al. (1991) Nature 354:84-86, Houghten et al. (1992) BioTechniques 313:412-421; and Scott et al. (1994) Curr. Opin. Biotechnol. 5:40-48]. There are
numerous examples of synthetic peptide and oligonucleotide combinatorial libraries. The present direction in this area is to produce combinatorial libraries that contain non-peptidic small organic molecules. Such libraries are based on either a basis
set of monomers that can be combined to form mixtures; of diverse organic molecules or that can be combined to form a library based upon a selected pharmacophore monomer.
There are three critical aspects in any combinatorial library: (i) the chemical units of which the library is composed; (ii) generation and categorization of the library, and (iii) identification of library members that interact with the target
of interest, and tracking intermediary synthesis products and the multitude of molecules in a single vessel.
The generation of such libraries often relies on the use of solid phase synthesis methods, as well as solution phase methods, to produce collections containing tens of millions of compounds that can be screened in diagnostically or
pharmacologically relevant in vitro assay systems. In generating large numbers of diverse molecules by stepwise synthesis, the resulting library is a complex mixture in which a particular compound is present at very low concentrations, so that it is
difficult or impossible to determine its chemical structure. Various methods exist for ordered synthesis by sequential addition of particular moieties, or by identifying molecules based on spacial positioning on a chip. These methods are cumbersome and
ultimately impossible to apply to highly diverse and large libraries. Identification of library members that interact with a target of interest, and tracking intermediary synthesis products and the multitude of molecules in a single vessel is also a
problem.
High Throughput Screening
In addition, exploitation of this diversity requires development of methods for rapidly screening compounds. Advances in instrumentation, molecular biology and protein chemistry and the adaptation of biochemical activity screens into microplate
formats, has made it possible to screen of large numbers of compounds. Also, because compound screening has been successful in areas of significance for the pharmaceutical industry, high throughput screening (HTS) protocols have assumed importance.
Presently, there are hundreds of HTS systems operating throughout the world, which are used, not only for compound screening for drug discovery, but also for immunoassays, cell-based assays and receptor-binding assays.
An essential element of high throughput screening for drug discovery process and areas in which molecules are identified and tracked, is the ability to extract the information made available during synthesis and screening of a library,
identification of the active components of intermediary structures, and the reactants and products of assays. While there are several techniques for identification of intermediary products and final products, nanosequencing protocols that provide exact
structures are only applicable on mass to naturally occurring linear oligomers such as peptides and amino acids. Mass spectrographic [MS] analysis is sufficiently sensitive to determine the exact mass and fragmentation patterns of individual synthesis
steps, but complex analytical mass spectrographic strategies are not readily automated nor conveniently performed. Also, mass spectrographic analysis provides at best simple connectivity information, but no stereoisomeric information, and generally
cannot discriminate among isomeric monomers. Another problem with mass spectrographic analysis is that it requires pure compounds; structural determinations on complex mixtures is either difficult or impossible. Finally, mass spectrographic analysis is
tedious and time consuming. Thus, although there are a multitude of solutions to the generation of libraries and to screening protocols, there are no ideal solutions to the problems of identification, tracking and categorization.
These problems arise in any screening or analytical process in which large numbers of molecules or biological entities are screened. In any system, once a desired molecule(s) has been isolated, it must be identified.
Simple means for identification do not exist. Because of the problems inherent in any labeling procedure, it would be desirable to have alternative means for tracking and quantitating chemical and biological reactions during synthesis and/or
screening processes, and for automating such tracking and quantitating.
Therefore, it is an object herein to provide methods for identification, tracking and categorization of the components of complex mixtures of diverse molecules. It is also an object herein to provide products for such identification, tracking
and categorization and to provide assays, diagnostics and screening protocols that use such products. It is of particular interest herein to provide means to track and identify compounds and to perform HTS protocols.
SUMMARY OF THE INVENTION
Combinations of matrix materials with programmable data storage or recording devices, herein referred to as memories, and assays using these combinations are provided. These combinations are referred to herein as matrices with memories. By
virtue of this memory with matrix combination, molecules, such as antigens, antibodies, ligands, proteins and nucleic acids, and biological particles, such as phage and viral particles and cells, that are associated with, such as in proximity to or in
physical contact with the matrix combination, can be electromagnetically tagged by programming the memory with data corresponding to identifying information. Programming and reading the memory is effected remotely, preferably using electromagnetic
radiation, particularly radio frequency or radar. Memories may also be remote from the matrix, such as instances in which the memory device is precoded with a mark or identifier or the matrix is encoded with a bar code. The identity [i.e., the mark or
code] of each device is written to a memory, which may be a computer or a piece of paper or any recording device, and information associated with each matrix is stored in the remote memory and linked to the code or other identifier.
Of particular interest herein are matrices with memories in which the matrices have an engraved coded. These matrices with memories are herein referred to as matrices with codes or optical memory devices [OMDs]. The memoreis are remote
recording devices, such as a remote computer memory in which information associated with the codes is stored. The materials are encoded with identifying information and/or any other information of interest. Synthetic protocols and assays using encoded
matrix materials are provided. By virtue of this code on the matrix, molecules, such as antigens, antibodies, ligands, proteins and nucleic acids, and biological particles, such as phage and viral particles, and cells, that are associated with, such as
in proximity to or in physical contact with the matrix, can be tagged by programming a memory, such as a memory in a computer, with data correspoding to the encoded identifying information. Programming and reading the memory is effected remotely,
preferably using electromagnetic radiation, particularly radio frequency or radar. The identity [i.e., the mark or code] of each device is written to a memory, which may be a computer or a piece of paper or any recording device, and information
associated with each matrix is stored in the remote memory and linked to the code or other identifier.
The molecules and biological particles that are associated with the matrix combination, such as in proximity to or in physical contact or with the matrix combination, can be identified and the results of the assays determined by retrieving the
stored data points from the memories. Querying the memory will identify associated molecules or biological particles that have reacted.
In certain embodiments of the matrices with memories, reactions, assays and other events or external parameters, such as temperature and/or pH, can be monitored because occurrence of a reaction or an event can be detected and such detection sent
to the recording device when proximate to the matrix and recorded in the memory.
The combinations provided herein thus have a multiplicity of applications, including combinatorial chemistry, isolation and purification of target macromolecules, capture and detection of macromolecules for analytical purposes, high throughput
screening, selective removal of contaminants, enzymatic catalysis, drug delivery, chemical modification, information collection and management and other uses. These combinations are particularly advantageous for use in multianalyte analyses, assays in
which a electromagnetic signal is generated by the reactants or products in the assay, for use in homogeneous assays, and for use in multiplexed protocols.
In preferred embodiments, these matrix with memory combinations contain (i) a miniature recording device that includes one or more programmable data storage devices [memories] that can be remotely read and in preferred embodiments also remotely
programmed; and (ii) a matrix, such as a particulate support used in chemical syntheses.
The matrix materials [matrices] are any materials that are routinely used in chemical and biochemical synthesis. The matrix materials are typically polymeric materials that are compatible with chemical and biological syntheses and assays, and
include, glasses, silicates, celluloses, polystyrenes, polysaccharides, polypropylenes, sand, and synthetic resins and polymers, including acrylamides, particularly cross-linked polymers, cotton, and other such materials. The matrices may be in the form
of particles or may be continuous in design, such as a test tube or microplate, 96 well or 384 well or higher density formats or other such microplates and microtiter plates. The matrices may contain one or a plurality of recording devices. For
example, each well or selected wells in the microplate include a memory device in contact therewith or embedded therein. The plates may further contain embedded scintillant or a coating of scintillant [such as FlashPlate.TM., available from DuPont
NEN.RTM., and plates available from Packard, Meriden, Conn.]. Automated robotic protocols will incorporate such plates for automated multiplexing [performing a series of coupled synthetic and processing steps, typically, though not necessarily on the
same platform, i.e. coupling of the chemistry to the biology] including one or more of the following, synthesis, preferably accompanied by writing to the linked memories to identify linked compounds, screening, including using protocols with matrices
with memories, and compound identification by querying the memories of matrices associated with the selected compounds.
The matrices are either particulate of a size that is roughly about 1 to 20 mm.sup.3 [or 1-20 mm in its largest dimension], preferably about 10 mm.sup.3 or smaller, preferably 1 mm.sup.3 or smaller, or a continuous medium, such as a microtiter
plate, or other multi-well plate, or plastic or other solid polymeric vial or glass vial or catheter-tube [for drug delivery] or such container or device conventionally used in chemistry and biological syntheses and reactions. In instances in which the
matrix is continuous, the data storage device [memory] may be placed in, on, or under the matrix medium or may be embedded in the material of the matrix.
The plates may also include a bar code, particularly the two-dimensional optical bar code provided herein on the base of each well or elsewhere. The two-dimensional bar code or other such code is particularly suited for application to each well
in a microplate, such as a microtiter plate, that contain 96, 384, 1536 or higher density formats. The bar code may also be used in combination with modules that are fitted into the frames of 96 wells, or higher density formats [such as those available
from NUNC, such as NUNC-Immuno Modules, and also sources, such as COSTAR plate strips, and Octavac Filter Strips]. Separate containers or strips of containers are designed to fit into microplate frames. Each such container may be encoded with a bar
code so that, upon removal from the strip, the container, and thereby, its contents or history, may be identified.
In embodiments herein in which the matrices with memories are used in assays, such as scintillation proximity assays [SPA], FP [fluorescence polarization] assays, FET [fluorescent energy transfers assays, FRET [fluorescent resonance energy
transfer] assays and HTRF [homogeneous time-resolved fluorescence] assays, the matrices may be coated with, embedded with or otherwise combined with or in contact with assay material, such as scintillant, fluophore or other fluorescent label. The
resulting combinations are called luminescing memories with matrices. When used in SPA formats they are referred to as scintillating matrices with memories and when used in non-radioactive energy transfer formats [such as HTRF] they are referred to as
fluorescing memories wraith matrices.
The recording device used in proximity to the matrix is preferably a miniature device, typically less than 10-20 mm.sup.3 [or 10-20 mm in its largest dimension] in size, preferably smaller, such as 1 to 5 mm, that includes at least one data
storage unit that includes a remotely programmable and remotely readable, preferably non-volatile, memory. This device with remotely programmable memory is in proximity to, associated with or in contact with the matrix. In particular, the recording
device includes a memory device, preferably having memory means, preferably non-volatile, for storing a plurality of data points and means for receiving a transmitted signal that is received by the device and for causing a data point corresponding to the
data signal to be permanently stored within the memory means. If needed, the recording device further includes a shell [coating] that is non-reactive with and impervious to any processing steps or solutions in which the combination of matrix with
recording device [matrix with memory] is placed, and that is transmissive of read or write signals transmitted to the memory. The device may also include at least one support matrix disposed on an outer surface of the shell for retaining molecules or
biological particles. The shell and support matrix may be the same. In such instances, the shell must be treated or derivatized such that molecules, particularly amino acids and nucleic acids, can be linked, preferably either electrostatically or
covalently, thereto. Thus, a transponder enclosed in plastic, must be further treated or coated to render it suitable for linkage of the molecule or biological particle.
The data storage device or memory is programmed with or encoded with information that identifies molecules or biological particles, either by their process of preparation, their identity, their batch number, category, physical or chemical
properties, combinations of any of such information, or other such identifying information. The molecules or biological particles are in physical contact, direct or indirect, or in proximity with the matrix, which in turn is in physical contact or in
the proximity of the recording device that contains the data storage memory. The molecule or biological particle may also be associated, such that ;a molecule or biological particle that had been linked to or in proximity with a matrix with memory may
be identified [i.e., although the matrix particle and biological particle or molecule are not linked or in proximity, the identify of the matrix that had been linked to the molecule or particle is known]. Typically, the matrix is on the surface of the
recording device and the molecules and biological particles are in physical contact with the matrix material. In certain embodiments, the memory device may be linked to or in proximity to more than one matrix particle.
The data storage device or memory can also be programmed by virtue of a reaction in proximity to or in the vicinity of the matrix with memory. In particular, the recording devices include memories and also additional components that detect
occurrence of external events or to monitor the status of external parameters, such as EM emissions, changes in temperature or pH, ion concentrations and other such solution parameters. For example, recording devices include memories and also include a
photodectector can detect the occurrence of fluorescence or other optical emission. Coupling this emission with an amplifier and providing a voltage to permit data storage in the matrix with memory during the reaction by way of, for example an RF signal
transmitted to and received by an antenna/rectifier combination within the data storage device or providing voltage sufficient to write to memory from a battery [see, e.g., U.S. Pat. No. U.S. Pat. No. 5,350,645 and U.S. Pat. No. 5,089,877], permits
occurrence of the emission to be recorded in the memory.
The recording device [containing the memory] is associated with the memory. Typically, the recording device is coated with at least one layer of material, such as a protective polymer or a glass, including polystyrene, heavy metal-free glass,
plastic, ceramic, and may be coated with more than one layers of this and other materials. It must be treated to render it suitable for linking molecules or biological particles when it is used as a support. For example, it may be coated with a ceramic
or glass that are suitably deivatized or then coated with or linked to the matrix material. Alternatively, the glass or ceramic or other coating may serve as the matrix. In other embodiments the recording device and the matrix material are in
proximity, such as in a container of a size approximately that of the device and matrix material. In yet other embodiments the recording device and matrix material are associated, such that the molecule or biological particle that was linked to the
matrix or that was in proximity thereto may be identified.
The matrix combinations [the matrices with memories], thus, contain a matrix material, typically in particulate form, in physical contact with a tiny device containing one or more remotely programmable data storage units [memories]. Contact can
be effected by placing the recording device with memory on or in the matrix material or in a solution that is in contact with the matrix material or by linking the device, either by direct or indirect covalent or non-covalent interactions, chemical
linkages or by other interactions, to the matrix. Alternatively, matrices with memories carry a code, such as a bar code, preferably a two-dimensional bar code, on typically one surface and the memory is remote, such as a memory in a computer or any
written record by which the code can be deciphered and information stored and associated therewith.
For example, when the memories are proximate to the matrix, contact can be effected chemically, by chemically coupling the recording device with memory to the matrix, or physically by coating the recording device with the matrix material or
another material, by physically inserting or encasing the device in the matrix material, by placing the device onto the matrix or by any other means by which the device can be placed in contact with or in proximity to the matrix material. The contact
may be direct or indirect via linkers. The contact may be effected by absorption or adsorption.
Since matrix materials have many known uses in conjunction with molecules and biological particles, there are a multitude of methods known to artisans of skill in this art for linking, joining or physically contacting the molecule or biological
particle with the matrix material. In some embodiments, the recording device with data storage unit is placed in a solution or suspension of the molecule or biological particle of interest. In some of such instances, the container, such as the
microtiter plate or test tube or other vial, is the matrix material. The recording device is placed in or on the matrix or is embedded, encased or dipped in the matrix material or otherwise place in proximity by enclosing the device and matrix material
in a sealed pouch or bag or container [MICROKAN.TM.] fabricated from, preferably, porous material, such as polytetrafluoroethylene [marketed TEFLON.RTM. (Trademark, E. I. DuPont)] or polypropylene prepared with pores, that is inert to the reaction of
interest and that have pores of size permeable to desired components of the reaction medium.
More than one data storage device may be in proximity to or contact with a matrix particle, or more than one matrix particle may be in contact with on device. For example, microplates, such as microtiter at plates or other such high density
format 1 96, 384 1536 or more wells per plate, such as those available from Nunc, Naperville, Ill., Costar, Cambridge Mass., and Millipore, Bedford, Mass.] with the recording device containing the data storage unit [remotely programmable memory] embedded
in each well or vials [typically with a 1 ml or smaller capacity] with an embedded recording device may be manufactured.
In a preferred embodiment, the recording device is a semiconductor that is approximately 10 mm or less in its largest dimension and the matrix material is a particle, such as a polystyrene bead. The device and a
plurality of particles, referred to as "beads", typically about 1 mg to about 50 mg, but larger size vessels and amounts up to 1000 mg, preferably 50 to about 200 mg, are sealed in chemically inert porous supports, such as polypropylene formed
so that it has pores of a selected size that excludes the particles but permits passage of the external medium. For example, a single device and a plurality of particles may be sealed in a porous or semi-permeable inert material to producer a
microvessel [such as the MICROKAN.TM.] such as a TEFLON.RTM. [polytetrafluoroethylene] or polypropylene or membrane that is permeable to the components of the medium, or they may be contained in a small closable container that has at least one dimension
that is porous or is a semi-permeable tube. Typically such tube, which preferably has an end that can be opened and sealed or closed tightly. These microvessels preferably have a volume of about 200-500 mm.sup.3, but can have larger volumes, such as
greater than 500 mm.sup.3 [or 1000 mm.sup.3 ] at least sufficient to contain at least 200 mg of matrix particles, such as about 500-3000 mm.sup.3, such as 1000-2000 or 1000 to 1500, with preferred dimensions of about 1-10 mm in diameter and 5 to 20 mm in
height, more preferably about 5 mm by 15 mm, or larger, such as about 1-6 cm by 1-6 cm. The porous wall should be non-collapsible with a pore size in the range of 70 .mu.M to about 100 .mu.M, but can be selected to be semi-permeable for selected
components of the medium in which the microvessel is placed. The preferred geometry of these combinations is cylindrical. These porous microvessels may be sealed by heat or may be designed to snap or otherwise close. In some embodiments they are
designed to be reused. In other embodiments, the microvessel MICROKAN.TM. with closures may be made out of non-porous material, such as a tube in the conical shape or other geometry.
Also provided herein are tubular devices [or other geometry] in which the recording devise is enclosed in a solid polymer, such as a polypropylene, which is then radiation grafted with selected monomers to produce a surface suitable for chemical
synthesis and linkage of molecules or biological particles. These tubular devices [or other geometry] MICROTUBES.TM. may contain a recording device or may include a code engraved, such as by a laser, or otherwise imprinted on the surface.
Other devices of interest, are polypropylene supports, generally about 5-10 mm in the largest dimension, and preferably a cube or other such shape, that are marked with a code, and tracked using a remote memory. These microvessels can be marked
with a code, such as a bar code, alphanumeric code or other mark, for identification, particularly in embodiments in which the memory is not in proximity to the matrix, but is remote therefrom and used to store information regarding each coded vessel.
The combination of matrix with memory is used by contacting it with, linking it to, or placing it in proximity with a molecule or biological particle, such as a virus or phage particle, a bacterium or a cell, to produce a second combination of a
matrix with memory and a molecule or biological particle. In certain instances, such combinations of matrix with memory or combination of matrix with memory and molecule or biological particle may be prepared when used or may be prepared before use and
packaged or stored as such for futures use. The matrix with memory when linked or proximate to a molecule or biological particle is herein referred to as a microreactor.
The miniature recording device containing the data storage unit(s) with remotely programmable memory, includes, in addition to the remotely programmable memory, means for receiving information for storage in the memory and for retrieving
information stored in the memory. Such means is typically an antenna, which also serves to provide power in a passive device when combined with a rectifier circuit to convert received energy, such as RF, into voltage, that can be tuned to a desired
electromagnetic frequency to program the memory. Power for operation of the recording device may also be provided by a battery attached directly to the recording device, to create an active device, or by other power sources, including light and chemical
reactions, including biological reactions, that generate energy.
Preferred frequencies are any that do not substantially alter the molecular and biological interactions of interest, such as those that are not substantially absorbed by the molecules or biological particles linked to the matrix or in proximity
of the matrix, and that do not alter the support properties of the matrix. Radio frequencies are presently preferred, but other frequencies, such as radar, or optical lasers will be used, as long as the selected frequency or optical laser does not
interfere with the interactions of the molecules or biological particles of interest. Thus, information in the form of data points corresponding to such information is stored in and retrieved from the data storage device by application of a selected
electromagnetic radiation frequency, which preferably is selected to avoid interference from any background electromagnetic radiation.
The preferred miniature recording device for use in the combinations herein is a single substrate of a size preferably less than about 10 to 20 mm.sup.3 [or 10-20 mm in its largest dimension], that includes a remotely programmable data storage
unit(s) [memory], preferably a non-volatile memory, and an antenna for receiving or transmitting an electromagnetic signal [and in some embodiments for supplying power in passive devices when combined with a rectifier circuit] preferably a radio
frequency signal; the antenna, rectifier circuit, memory and other components are preferably integrated onto a single substrate, thereby minimizing the size of the device. An active device, i.e., one that does not rely on external sources for providing
voltage for operation of the memory, may include a battery for power, with the battery attached to the substrate, preferably on the surface of the substrate. Vias through the substrate can then provide conduction paths from the battery to the circuitry
on the substrate. The device is rapidly or substantially instantaneously programmable, preferably in less than 5 seconds, more preferably in about 1 second, and more preferably in about 50 to 100 milliseconds or less, and most preferably in about 1
millisecond or less. In a passive device that relies upon external transmissions to generate sufficient voltage to operate, write to and read from an electronic recording device, the preferred memory is non-volatile, permanent, and relies on
antifuse-based architecture or flash memory. Other memories, such as electrically programmable erasable read only memories [EEPROMs] based upon other architectures also can be used in passive devices. In active recording devices that have batteries to
assure continuous power availability, a broader range of memory devices may be used in addition to those identified above. These memory devices include dynamic random access memories [DRAMS, which refer to semiconductor volatile memory devices that
allow random input/output of stored information; see, e.g., U.S. Pat. Nos. 5,453,633, 5,451,896, 5,442,584, 5,442,212 and 5,440,511], that permit higher density memories, and EEPROMs.
Containers, such as vials, tubes, microtiter plates, capsules and the like, which are in contact with a recording device that includes a data storage unit with programmable memory are also provided. The container is typically of a size used in
immunoassays or hybridization reactions, generally a liter or less, typically less than 100 ml, and often less than about 10 ml in volume. Alternatively the container can be in the form of a plurality of wells, such as a microtiter plate, each well
having about 1 to 1.5 ml or less in volume. The container is transmissive to the electromagnetic radiation, such as radio frequencies, infrared wavelengths, radar, ultraviolet wavelengths, microwave frequencies, visible wavelengths, X-rays or laser
light, used to program the recording device.
Methods for electromagnetically tagging molecules or biological particles are provided. Such tagging is effected by placing the molecules or biological particles of interest in proximity with the recording device or with the matrix with memory,
and programming or encoding the identity of the molecule or synthetic history of the molecules or batch number or other identifying information into the memory. The, thus identified molecule or biological particle is then used in the reaction or assay
of interest and tracked by virtue of its linkage to the matrix with memory, its proximity to the matrix with memory or its having been linked or in proximity to the matrix [i.e., its association with], which can be queried at will to identify the
molecule or biological particle. The tagging and/or reaction or assay protocols may be automated. Automation will use robotics with integrated matrix with memory plated based or particulate matrix with memory automation [see, U.S. Pat. No. 5,463,564,
which provides an automated iterative method of drug design].
In particular, methods for tagging constituent members of combiniatorial libraries and other libraries or mixtures of diverse molecules and biological particles are provided. These methods involve electromagnetically tagging molecules,
particularly constituent members of a library, box contacting the molecules or biological particles or bringing such molecules or particles into proximity with a matrix with memory and programming the memory with retrievable information from which the
identity, synthesis history, batch number or other identifying information can be retrieved. The contact is preferably effected by coating, completely or in part, the recording device with memory with the matrix and then linking, directly or via
linkers, the molecule or biological particle of interest to the matrix support. The memories can be coated with a protective coating, such as a glass or silicon, which can be readily derivatized for chemical linkage or coupling to the matrix material.
In other embodiments, the memories can be coated with matrix, such as for example dipping the memory into the polymer prior to polymerization, and allowing the polymer to polymerize on the surface of the memory.
If the matrices are used for the synthesis of the constituent molecules, the memory of each particle is addressed and the identity of the added co | | |
