WO1999020794A1 - Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr - Google Patents
Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr Download PDFInfo
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- WO1999020794A1 WO1999020794A1 PCT/FR1998/002244 FR9802244W WO9920794A1 WO 1999020794 A1 WO1999020794 A1 WO 1999020794A1 FR 9802244 W FR9802244 W FR 9802244W WO 9920794 A1 WO9920794 A1 WO 9920794A1
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- oligonucleotide
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6881—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for tissue or cell typing, e.g. human leukocyte antigen [HLA] probes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
Definitions
- the present invention relates to means making it possible to document the repertoires of a human or animal individual in NKR (Natural Killer Receptor) immunoreceptors of the type of immunoglobulins or of the type of lectins, and in immunoreceptor activating counterparts, or at least non-inhibiting, NKR immunoreceptors. It also targets their biological applications.
- NKR Natural Killer Receptor
- the immune functions of a man or an animal are defined by several categories of highly diversified molecules, such as in particular the ABO blood group system, the family of MHC molecules (Major Histocompatibility Complex, called in humans , ELLA system - Hiiman Leukocyte Antigen-), the family of receptors for the antigen of T lymphocytes (TCR) and B lymphocytes (BCR).
- MHC molecules Major Histocompatibility Complex
- TCR T lymphocytes
- BCR B lymphocytes
- Immunoglobulin type NKR receptors include KIR (Killer cell Inhibitory Receptor) receptors such as in particular the p58.1, p58.2, p70.INH, pl40.LNH receptors.
- the lectin-type NKR receptors include the NKG2 inhibitory receptors such as in particular the NKG2A and NKG2B receptors. All of these receptors NKR are inhibitory.
- KAR receptors Insert cell Activatory Receptor
- NKG2C receptors NKG2D, NKG2E and NKG2F homologous to the NKG2A and NKG2B receptors.
- NKR receptor activating, or at least non-inhibiting, receptors are hereinafter designated, for the sake of fluidity, NKR counterparts.
- NKR receptors and NKR counterpart receptors are naturally expressed by NK cells and by T-cell subpopulations. Several of these receptors can be expressed by the same cell. All of these receptors, whether they are inhibitors (ie NKR) or whether they are activators or non-inhibitors (ie counterparts of NKR), have in common the ligand of molecules which are not derived from antigen: ligands NKR receptors and NKR counterpart receptors are MHC class I molecules.
- NKR receptor Recognition of its ligand by an NKR receptor triggers the transduction to the cell of a message aimed at inhibiting its activity, eg reduction or cessation of cytolysis, of secretion of cytokines, while recognition of its ligand by a counterpart receptor NKR induces an activating message, or at the very least non-inhibiting message.
- the result between NKR receptors and NKR counterpart receptors thus activated by their ligands corresponds to a signal, generally negative or positive, of activation of the NK and / or T cells which express them.
- the NKR receptors and their counterparts thus participate in the control, positive or negative, of the allogenic reactions of a given immune system vis-à-vis what it then considers as non-self for example, cancerous or infected cells, or much more transplant or transplant cells allo- or xeno-genic.
- NKR receptors and their counterparts participate in the reactions between host and graft during a transplant (or transplant) of cells, tissue or organ which presents (s) a certain degree of antigenic incompatibility with the host.
- oligonucleotide primers currently available do not allow they do not use a polymerase chain reaction capable of discriminating between, for example, an NKR p58.1 and an NKR p58.2, or between im NKR p70.INH and an NKR pl40.INH.
- a polymerase chain reaction capable of discriminating between, for example, an NKR p58.1 and an NKR p58.2, or between im NKR p70.INH and an NKR pl40.INH.
- a step of purification of the targeted receptors eg by FACSca ⁇ j, a step of nucleotide sequencing. Documentation of the NKR repertoire / counterparts of NKR n is therefore currently not achievable routinely in a medical context.
- NK and T cell activation programs The level of stimulation and inhibition of NK and T cell activation programs, and therefore the potential for resistance of an individual vis-à-vis the The development of microbial or parasitic infections, autoimmune diseases, or even mahne cells, cannot therefore be measured, as a result of this lack of suitable means for documenting the NKR repertoires which are counterparts of NKR that the selective effects of type GVL can only be used in therapy, and only GVH reactions or rejection during transplants or allo- o transplants xenogenics cannot be completely ruled out.
- the present invention therefore proposes means making it possible to document, for a given biological sample, the repertoires of NKR immunoreceptors and of immunoreceptor activating counterparts or at least non-inhibiting NKR receptors. These means make it possible in particular to easily distinguish between an NKR receptor and its activating or non-inhibiting counterpart, as well as to distinguish between different NKR receptors, or between different NKR counterparts. It also targets the biological applications, and in particular medical and veterinary, of these means.
- One of the essential aspects according to the invention consists in considering all of the NKR immunoreceptors and NKR counterparts as a repertoire, that is to say as a coherent whole, forming a unit with respect to a type of activity.
- the control of the lymphocyte activation of the man or animal from which said biological sample is taken (negative control for the repertoire of NKR receptors, positive control for the repertoire of NKR counterparts).
- the invention provides, for the first time, means making it possible to document, routinely in a medical or veterinary context, NKR directories and / or NKR counterparts, so as to be able to quickly and effectively analyze physiological and pathological situations related to these directories.
- the means according to the invention have the particular advantage of being easily usable in a medical or veterinary context, for example in a hospital or clinic.
- the present invention relates to an in vitro method for documenting a repertoire of NKR immunoreceptor (s) comprising in particular the KIR receptors p58.1, p58.2, p70.INH, p O.INH, and the receptors NKG2A and NKG2B , and / or a repertoire of NKR counterpart immunoreceptor (s), comprising in particular the KAR p50.1, p50.2, p70.ACT, pl40.ACT receptors, and the NKG2C, NKG2D, NKG2E receptors, NKG2F, these immunoreceptors being hereinafter designated target receptor (s), characterized in that it comprises: i.
- oligonucleotides one being designated 3 'oligonucleotide and the other 5' oligonucleotide, the 3 'and 5' oligonucleotides of the same said pair being both capable, under conditions hybridization corresponding to an incubation for 1 min in a buffer [20 mM Tris-HCl pH8.4; KC1 50mM; 2.5 mM MgCl 2 ] at a temperature between approximately 50 ° C.
- a functional counterpart of a receptor we mean in the present application a receptor with homologous structure, in particular at the extracytoplasmic level, but with a different function: for example, a functional counterpart of the NKR p58.1 receptor is the counterpart receptor of NKR pSO . l, and vice versa; similarly the NKR p58.2 receiver and the NKR p50.2 counterpart receiver are functional counterparts for each other.
- the present method therefore makes it possible in particular to distinguish an NKR receiver (or NKR counterpart) from a functional counterpart receiver of this receptor.
- the pair (s) of 3 'and 5' oligonucleotides is (are) in particular capable of binding, on the DNA or cDNA of a target receptor which corresponds to them, a sequence of oligonucleotides (bounds included ) which is absent from the DNA or cDNA sequence of a receptor with which it (s) is (are) capable (s) of not hybridizing under the hybridization conditions given under i) above.
- said or at least one of said pair (s) of 3 'and 5' oligonucleotides used is also capable, under the same hybridization conditions as those defined in i., Of not being s' hybridize to the DNA or cDNA of a receptor, either NKR or NKR counterpart, other than said target receptor.
- said (or at least one of said pair (s) of 3 'and 5' oligonucleotides capable, under the hybridization conditions defined in i. above, to hybridize to DNA or cDNA of a p58.1 receptor (or p50.1), and not to hybridize to DNA or cDNA of a p50.1 receptor (or respectively ⁇ 58.1) is also capable of not hybridizing under the same conditions of hybridization to the DNA or the cDNA of a p58.2 or p50.2 receptor.
- said, or at least one of said, pair (s) of 3 'and 5' oligonucleotides capable, under the hybridization conditions defined under i. above, to hybridize to the DNA or cDNA of a p58.2 receptor (or p50.2), and not to hybridize to the DNA or cDNA of a p50 receptor .2 (or respectively p58.2) is also capable of not hybridizing under the same hybridization conditions to the DNA or the cDNA of a p58.1 or p50.1 receptor.
- said (or at least one of said) pair (s) of oligonucleotides 3 'and 5 ! capable, under the hybridization conditions defined in i. above, to hybridize to the DNA or cDNA of a p70.INH receptor (or p70.ACT), and not to hybridize to the DNA or cDNA of a p70 receptor .
- ACT (or respectively p70. ⁇ S ⁇ [) is also capable of not hybridizing under the same conditions of hybridization to the DNA or the cDNA of a pl40.INH or pl40.ACT receptor.
- said, or at least one of said, pair (s) of 3 'and 5' oligonucleotides capable, under the hybridization conditions defined under i. above, to hybridize to the DNA or cDNA of a pl40.INH receptor (or pl40.ACT), and not to hybridize to the DNA or cDNA of a pl40 receptor .
- ACT (or respectively pl40.INH) is also capable of not hybridizing under the same conditions of hybridization to the DNA or the cDNA of a p70.INH or p70.ACT receptor.
- the 5 ′ oligonucleotide of a said pair of 3 'and 5' oligonucleotides used for an NKR target receptor is capable, under the hybridization conditions defined under i. above, to hybridize to the DNA or to the cDNA of a receptor counterpart of NKR (or respectively NKR), functional counterpart of said target receptor NKR (or respectively counterpart of NKR).
- the sequence of the oligonucleotide 5 ′ of the so-called pair of 3 'and 5 ′ oligonucleotides used for an NKR target receptor (or NKR counterpart) comprises the sequence of the oligonucleotide 5 ′ of another said pair of 3 ′ and 5 ′ alpha-nucleotides having as target receptor a counterpart receptor for NKR (or respectively NKR), functional counterpart of said target receptor NKR (or respectively counterpart for NKR).
- the 3 ′ oligonucleotide of a said pair of 3 ′ and 5 ′ oligonucleotides, used for a target receptor KAR is capable, under the same so-called hybridization conditions, of hybridize to the DNA or cDNA of said KAR target receptor at the level of a nucleotide sequence which comprises a sequence corresponding, according to the universal genetic code, and taking into account the degeneration of said code, to the amino acid sequence Lys Ile Pro Plie Thr Ile (KIPFTI) or Lys Leu Pro Phe Thr ⁇ e (KLPFTI) (SEQ ID n ° 26 or 27).
- KIPFTI KIPFTI
- KLPFTI Lys Leu Pro Phe Thr ⁇ e
- said (or at least one of said) pair (s) of 3 ′ and 5 ′ oligonucleotides having as target receptor a KIR receptor is chosen from the group of pairs of 3 hgonucleotides 'and 5' consisting of: a 5 'oligonucleotide comprising the sequence SEQ LD No. 1, or a sequence derived therefrom, and at least one 3' oligonucleotide comprising the sequence SEQ ID No. 5, No. 2, No. 6 or No. 7, or a sequence derived therefrom, a 5 'ohgonucleotide comprising the sequence SEQ ID No.
- sequence deriving from a first sequence we mean in the present application a sequence derived from the first in particular by inversion, deletion, addition, or substitution of nucleotide (s), and having the hybridization properties that the corresponding nucleic acid to the first sequence present in conditions i. above defined.
- said pair of 3 'and 5' ohgonucleotides having as target receptor a p58.1 receptor corresponds to a 5 'ohgonucleotide comprising SEQ ID No. 1, or a sequence derived therefrom, and an equimix of four 3 'oligonucleotides, each comprising SEQ ID NO: 5, NO 2, NO 6 or NO 7, or a sequence derived therefrom.
- said pair of 3 'and 5' ohgonucleotides having as target receptor a p58.2 receptor corresponds to a 5 'oligonucleotide comprising SEQ ID No. 4, or a sequence derived therefrom , and an equimix of four 3 'oligonucleotides, each comprising SEQ ID NO: 5, NO 2, NO 6 or NO 7, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor a p70.INH receptor corresponds to a 5 'oligonucleotide comprising SEQ ID No. 9, or a sequence in deriving, and an equimix of four 3 'oligonucleotides, each comprising SEQ ID NO: 5, NO 2, NO 6 or NO 7, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor a pl40.INH receptor corresponds to an equimix of four 5 'oligonucleotides, each of them comprising SEQ ID # 10, # 11, # 12 or # 13, or a sequence derived therefrom, and a 3 'oligonucleotide comprising SEQ ID No. 14, or a sequence derived therefrom.
- said (or at least one of said) pair (s) of 3 ′ and 5 ′ oligonucleotides having as target receptor a KAR receptor is chosen from the group of 3 ′ pairs of oligonucleotides and 5 'consisting of:
- a 5 'ohgonucleotide comprising the sequence SEQ ID No. 1, or a sequence derived therefrom
- a 3' ohgonucleotide comprising the sequence SEQ ID No. 3, or a sequence derived therefrom
- a 5 'ohgonucleotide comprising the sequence SEQ ID No. 8, or a sequence derived therefrom
- a 3 ′ ohgonucleotide comprising the sequence SEQ ID No. 3, or a sequence derived therefrom
- a 5 'ohgonucleotide comprising the sequence SEQ 3D No. 9, or a sequence derived therefrom
- a 3' ohgonucleotide comprising the sequence SEQ ID No. 3, or a sequence derived therefrom
- a 5 'ohgonucleotide comprising the sequence SEQ ID No. 15, or a sequence derived therefrom, and a 3' ohgonucleotide comprising the sequence SEQ ID No. 3, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor a p50.1 receptor corresponds to a 5 'oligonucleotide comprising SEQ ID No. 1, or a sequence derived therefrom , and a 3 'oligonucleotide comprising SEQ ID No. 3, or a drifting sequence.
- said pair of 3 ′ and 5 ′ oligonucleotides having as target receptor a p50.2 receptor corresponds to a 5 ′ oligonucleotide comprising SEQ ID No. 8, or a sequence in derived, and a 3 'oligonucleotide comprising SEQ ID No. 3, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor a p70.ACT receptor corresponds to a 5 'oligonucleotide comprising SEQ ID No. 9, or a sequence derived therefrom, and a 3 'oligonucleotide comprising SEQ ID No. 3, or a sequence derived therefrom.
- ACT receptor corresponds to a 5 'oligonucleotide comprising SEQ ID No. 15, or a sequence derived therefrom, and a 3 'oligonucleotide comprising SEQ ID No. 3, or a sequence derived therefrom.
- said (or at least one of said) pair (s) of 3 'and 5' oligonucleotides having as target receptor an NKG2 receptor is chosen from the group of pairs of 3 'and 5' ohgonucleotides consisting of:
- a 5 'ohgonucleotide comprising the sequence SEQ ID No. 16, or a sequence derived therefrom
- a 3' ohgonucleotide comprising the sequence SEQ ID No. 17, or a sequence derived therefrom
- a 5 'ohgonucleotide comprising the sequence SEQ ID No. 18, or a sequence derived therefrom
- a 3' ohgonucleotide comprising the sequence SEQ ID No. 17, or a sequence derived therefrom
- a 5 'ohgonucleotide comprising the sequence SEQ ID No. 20, or a sequence derived therefrom, and a 3' ohgonucleotide comprising the sequence SEQ ID No. 21, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor an NKG2A receptor (inhibitor) corresponds to a 5 'oligonucleotide comprising SEQ ID No. 16, or a sequence derived therefrom, and a 3 'ohgonucleotide comprising SEQ ID No. 17, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor an NKG2B receptor (inhibitor) corresponds to a 5 'oligonucleotide comprising SEQ ID No. 18, or a sequence derived therefrom, and a 3 'ohgonucleotide comprising SEQ ID No. 17, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor an NKG2C receptor (activator) corresponds to a 5 'oligonucleotide comprising SEQ ID No. 19, or a sequence derived therefrom, and a 3 'ohgonucleotide comprising SEQ ID No. 17, or a sequence derived therefrom.
- said pair of 3 'and 5' oligonucleotides having as target receptor an NKG2D receptor (activator) corresponds to a 5 'oligonucleotide comprising SEQ ID No. 20, or a sequence derived therefrom, and a 3 'ohgonucleotide comprising SEQ ID No. 21, or a sequence derived therefrom.
- Said conditions favorable to the hybridization of the pair (s) of 3 'and 5' alpha-nucleotides brought into contact with the DNA or cDNA of the biological sample advantageously correspond to an incubation for 1 min in a buffer [Tris- 20mM HCl pH8.4; KC1 50mM; 2.5 mM MgCl 2 ] at one temperature between 50 ° C and 65 ° C approximately.
- a buffer Tris- 20mM HCl pH8.4; KC1 50mM; 2.5 mM MgCl 2
- the two 3 'or 5' oligonucleotides of the same said pair are each coupled to a label, in particular coupled to a fluorescent or radioactive label, such as 32 P, allowing the revealing of the hybrids which they possibly form. with said DNA or cDNA populations of said biological sample.
- said pair (s) of oligonucleotide (s) 3 ′ and 5 ′ serve (serve) primers respectively 3 ′ and 5 ′ for extension by DNA polymerase, such as a Taq polymerase.
- DNA polymerase such as a Taq polymerase.
- Conditions favorable to such an extension include, in addition to the addition of DNA polymerase, the addition of 4 dNTPs (deoxyribonucleoside-triphosphate) in the presence of a buffer
- hybrids which may be formed are then, prior to their detection, amplified by at least one PCR (polymerase chain reaction; cf. patents EP 201 184 and EP 200 362) or RT-PCR in the case of cDNA retrotranscribed from of mRNA.
- said hybrids which may be formed are amplified by "Nested PCR” (nested double PCR). Examples of conditions favorable to PCR amplification are given in the examples.
- said detection of the hybrids possibly formed further comprises the resolution on polyacrylamide gel of the reaction mixture resulting from the bringing into contact, as well as the revelation of the presence or absence of electrophoretic strips containing said possibly formed hybrids.
- the documented immunoreceptor repertoire is quantified by reference to the quantities of b-actin measured on the same biological sample, or by reference to the quantities of a molecule specific for a cell type present in said biological sample, such as in particular the CD56 molecules for NK cells.
- step ii. contacting defined above is then carried out with the genomic DNA populations of the biological sample.
- step ii. contact defined above is then carried out with the cDNA populations, transcribed from the mRNA populations of the biological sample.
- Biological samples of human or animal origin particularly suitable for implementing the method according to the invention include peripheral blood, bone marrow, lymphocytes, NK and / or T cells, transgenic cells expressing immunoreceptors , a fraction isolated from these samples.
- the method according to the invention can in particular be applied to the screening of a bank of organs, tissues or cells.
- the method according to the invention also allows the monitoring of the possible appearance of such reactions after allo- or xenogenic transplant or transplantation.
- the method according to the invention can also be applied to the determination of the state of activation of NK and / or T cells at a given time in an animal or a man. It then allows the prediction or the monitoring of the state of resistance of an animal or a man vis-a-vis a viral infection, such as an infection by a VLH, of a parasitic infection, such as malaria, a bacterial infection, vis-à-vis an autoimmune disease, such as rheumatoid arthritis, or even vis-à-vis the development of mahgnes cells such as leukemic cells.
- the predictive use of the method according to the invention is of particular interest in the context of epidemics.
- the method according to the invention can also be advantageously applied to the screening of drugs which are active against infectious diseases, autoimmune diseases, or tumor diseases.
- the present invention also relates to a kit for the implementation of said method comprising in a container, at least one said pair of hgonucleotides, the reagents for carrying out said method or methods such as buffer, marker (optionly coupled to the oligonucleotides of said pair), as well as a manual.
- FIG. 1 represents the products resulting from an amplification by PCR (polymerase chain reaction after RT reverse enzymatic transcription using pairs of oligonucleotides according to the invention serving as primers), coding sequences for p50.2 (Fig. 1A) and p58.2 (Fig.lB) in human NK cells;
- Figure 2 represents the products resulting from a PCR amplification of the coding sequence for p50.2 from the genomic DNA of p50.2 + transgenic mice.
- Example 1 Documentation of the NKR directory / NKR counterparts expressed by a population of human NK cells (RT-PCR).
- RNA preparations were made from cloned and phenotyped human NK cells p50.2 + and / or p58.2 +.
- the immunological technique does not allow to precisely document such a repertoire: the antibody GL183 (Immunotech) recognizes both the inhibitor NKR receptor p58.2 and its activating counterpart p50.2.
- Human NK cells cloned and phenotyped p50.2 " and p58.2 " using the antibody GL183 serve as negative controls.
- RNA preparations are rearranged as follows.
- Trizol Gibco BRL category No. 15596-026
- 100 ⁇ l of Trizol 100 ⁇ l was added to 10 6 ceUules. Mix by pipetting several times, without using a vortex mixer. The solution is left for 5 minutes at room temperature and then 20 ⁇ l of chloroform without isoamyl alcohol are added. Mix again without using a vortex mixer and allow the solution to stand for 5 minutes at room temperature. Then centrifuged at 4 ° C for 15 minutes so as to separate the lower organic phase, which contains DNA, from the upper aqueous phase which contains TARN. The aqueous phase is recovered without disturbing the interface between the aqueous phase and the organic phase.
- RNA pellet is resuspended suspension in 20 ml of H 2 0.
- Table 1 presents the pairs of oligonucleotides used. Here are reported the results relating to the use of the pairs of oligonucleotides C (SEQ ID n ° 4 as a 5 'oligonucleotide and a mixture of SEQ ID n ° 5, n ° 2, n ° 6 and n ° 7 as 3 ′) and D (SEQ ID No. 8 as 5 ′) and SEQ ID No. 3 as 3 ′) presented in Table 1.
- the cDNA sequences based on from which these pairs of oligonucleotides were developed, are presented in Table 2 below (name of the cDNA clones and access number on Genbank). For each pair of oligonucleotides, allelic variants and known variants of excision-splicing (alternative splicing) of the same receptor were thus taken into account.
- Each pair of oligonucleotides is constructed, after alignment of the known cDNA sequences of the different variants of the same target receptor (eg the KIR p58.2), so that this pair can determine, on all of these variants, the bounds of a consensus fragment, without being able to do the same on any variant of the counterpart receptor of the target receptor (eg the KAR p50.2).
- the sequence of each ohgonucleotide of the same pair is then optimized so that the annealing temperature (annealing in English) of each of them is close (e.g. ⁇ T ⁇ 5 ° C).
- Each ohgonucleotide has its own annealing (or hybridization) temperature.
- Annealing (or hybridization) temperature of an ohgonucleotide
- Tm 69.3 + 0.41 (R) - - (in ° C) length in bp
- oligonucleotides of the same pair must both be able to anneal to the target receptor under common reaction conditions, this in order to serve as primers for the amplification of the consensus fragment . If the oligonucleotides of the same pair have close natural annealing temperatures (eg 54 ° C and 56 ° C), they can hybridize to the target receptor, without hybridizing to the corresponding counterpart receptor, at a temperature 54 ° C or 55 ° C.
- the hybridization reaction to the target receptor is preferably carried out at the lower of the two temperatures (eg 49 ° C or 50 ° C), which makes it possible to maintain recognition of its nucleotide target by the ohgonucleotide whose natural annealing temperature is the lowest.
- a decrease in specificity may however occur: It can be observed that certain pairs of alpha-nucleotides manage, under such temperature conditions, to hybridize to the receptor-counterpart of the target receptor.
- One way of remedying this loss of specificity consists in increasing the length of the oligonucleotide whose natural annealing temperature is the lowest, without causing the pair of oligonucleotides considered to lose its specificity.
- RNA 5 ⁇ g of total RNA are transcribed into cDNA by incubation with a reverse transcriptase (RT) using the First Strand DNA-Ready to go kit (Pharmacia). 10 ⁇ l of cDNA on the 33 ⁇ l obtained are brought into contact with the pairs of oligonucleotides C and D which then serve as primers (cf.
- n ° 2 35 cycles including a) denaturation 1 min at 94 ° C b) annealing 1 min at 55 ° C for the C pair and 50 ° C for the D pair of oligonucleotides, c) extension 1 min at 72 ° C,
- n ° 3 (final extension): l min at 72 ° C.
- the duration of the 2c extension can be increased if the fragment to be amplified has a large size (e.g. greater than about 1000-1400bp).
- the temperature of the annealing step 2b depends on the pair of oligonucleotides used as primers (cf. point 2. above). It corresponds to a consensus temperature between the natural annealing temperatures of each of the two paired oligonucleotides (average temperature or lower temperature of the two). This temperature is generally between 45 ° C and 70 ° C, preferably between 50 ° C and 65 ° C.
- Figure 1 illustrates the amphfication by PCR after RT (reverse enzymatic transcription) of the coding sequences for p58.2 and p50.2 of human NK cells.
- FIG. 1A is illustrated the result of the electrophoretic resolution of the products resulting from the amplification by RT-PCR after contacting the pair of primers D according to the invention (cf. table 1) with the cDNA populations of ceUules human NK phenotyped p50.2 + and p58.2 + (lane +) using the antibody GL183, or with the cDNA populations of human NK cells phenotyped p50.2 " and p58.2 " (lane -) using this same GL183 antibody.
- track M molecular weight markers are resolved.
- FIG. 1B the result of the electrophoretic resolution of the products resulting from the amplification by RT-PCR is illustrated after contacting the pair of primers C according to the invention (cf. table 1) with the cDNA populations of this cells.
- track M molecular weight markers are resolved.
- pairs of C and D ohgonucleotides according to the invention make it possible to recognize a phenotype, respectively, p58.2 + and p50.2 + , by recognizing a fragment of, respectively, 653 bp and 533 bp.
- the method according to the invention therefore makes it possible to discriminate between a p58.2 + phenotype (KIR receptor, with inhibitory function) and a p50.2 + phenotype (KAR receptor counterpart of p58.2, with activating function), which does not was so far not achievable under sequencing.
- Example 2 Documentation of the (potential) NKR genetic repertoire / NKR counterparts of a population of p50.2 + transgenic mouse splenocytes (PCR).
- DNA preparations were carried out using p50.2 + transgenic mouse splenocytes.
- the immunological technique does not make it possible to determine if such splenocytes are p50.2 + (KAR receptor, activator) or p58.2 + (KIR receptor, inhibitor, or even p50.2 + and p58.2 + ).
- Non-transgenic mouse splenocytes (p50.2 " ) serve as negative controls. Extraction This step is carried out as described in Example 1.
- the DNA being contained in the lower organic phase, it is this phase which is recovered here after having eliminated the aqueous phase and a little interface.
- Precipitation 30 ⁇ l of 100% ethanol is added and the mixture is left to stand for 5 minutes at room temperature. After centrifugation for 5 minutes at 4 ° C (2,000 g), the supernatant is discarded and the pellet is washed with 100 ⁇ l of 0.1M sodium citrate in 10% ethanol. It is left for 30 minutes at room temperature, mixing from time to time. Centrifuge for 5 minutes at 4 ° C (2,000g). This washing is repeated a second time.
- the DNA pellet obtained is resuspended in 200 ⁇ l of 70% ethanol. It is left for 15 minutes at room temperature, mixing from time to time and it is centrifuged for 5 minutes at 4 ° C. (2000 g).
- the pellet is dried briefly under vacuum (1 to 2 ⁇ g of DNA approximately are obtained) and is resuspended in 10 ⁇ l of 8mM NaOH. In the presence of insoluble material, nhcrocentrifuge 10 minutes at room temperature. The supernatant is transferred to a new tube. The pH is neutralized by adding 1.25 ⁇ l of 0.1 M dHepes per 10 ⁇ l.
- the pairs of ohgonucleotides are prepared as described in Example 1.
- the results relating to the pair D of oligonucleotides are reported here (SEQ ID No. 8 as the 5 'ohgonucleotide and SEQ ID No. 3 as the Ogonucleotide 3 ') according to the invention (see Table 1 below).
- the polymerase chain reaction is carried out as described in Example 1 by bringing the genomic DNA preparations obtained into contact with pairs of oligonucleotides D then serving as primers.
- the products resulting from the amplification are resolved on 2% agarose gel in parallel with molecular weight markers (M).
- FIG. 2 shows the amplification by PCR of the coding sequence for p50.2 from the genomic DNA of p50.2 + transgenic mouse splenocytes: there is illustrated the result of the electrophoretic resolution of the products resulting from ramplification by PCR in contact of the pair of primers D according to the invention (cf. table 1) with the DNA populations of splenocytes of p50.2 J " transgenic mice (lanes +) or of p50.2 " non-transgenic mice (lanes -) .
- the primers D according to the invention make it possible to recognize a 533 bp fragment present on the DNA of murine splenocytes p50.2 + and absent on the DNA of murine splenocytes p50.2 " .
- NKR repertoires and / or counterparts of NKR thus documented can be, in particular using conventional biostatic studies, correlated to given physiological or pathological situations, linked to these repertoires, and to the control of the activation of the cells expressing them. in general. Table 1
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Abstract
Description
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000517112A JP2002510461A (ja) | 1997-10-20 | 1998-10-20 | Nkr免疫レセプタ及び/又はnkr免疫レセプタを活性化するか又は阻害しない相対物目録の文書化手段 |
| EP98950162A EP1017854A1 (fr) | 1997-10-20 | 1998-10-20 | Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr |
| CA002306445A CA2306445A1 (fr) | 1997-10-20 | 1998-10-20 | Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr |
| US11/104,353 US20050191695A1 (en) | 1997-10-20 | 2005-04-12 | Documentation means for repertoires of NKR immunoreceptors and/or activatory or non-inhibitory immunoreceptor counterparts of NKR immunoreceptors |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR97/13115 | 1997-10-20 | ||
| FR9713115A FR2769921B1 (fr) | 1997-10-20 | 1997-10-20 | Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/529,759 A-371-Of-International US20020192644A1 (en) | 1997-10-20 | 1998-10-20 | Documentation means for repertoires of nkr immunoreceptors and/or activatory or non-inhibitory immunoreceptor counterparts of nkr immnunoreceptors |
| US10/633,771 Continuation US20040259103A1 (en) | 1997-10-20 | 2003-08-04 | Means of documenting repertoires of NKR immunoreceptors and/or of activatory or non-inhibitory immunoreceptor counterparts of NKR immunoreceptors |
| US11/104,353 Continuation US20050191695A1 (en) | 1997-10-20 | 2005-04-12 | Documentation means for repertoires of NKR immunoreceptors and/or activatory or non-inhibitory immunoreceptor counterparts of NKR immunoreceptors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999020794A1 true WO1999020794A1 (fr) | 1999-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1998/002244 WO1999020794A1 (fr) | 1997-10-20 | 1998-10-20 | Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr |
Country Status (6)
| Country | Link |
|---|---|
| US (3) | US20020192644A1 (fr) |
| EP (1) | EP1017854A1 (fr) |
| JP (1) | JP2002510461A (fr) |
| CA (1) | CA2306445A1 (fr) |
| FR (1) | FR2769921B1 (fr) |
| WO (1) | WO1999020794A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2858631A1 (fr) * | 2004-09-24 | 2005-02-11 | Centre Nat Rech Scient | Procede de detection et d'identification de la presence de matieres biologiques provenant de poissons, et oligonucleotides pour sa mise en oeuvre |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2769921B1 (fr) * | 1997-10-20 | 2000-08-18 | Inst Nat Sante Rech Med | Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr |
| CN112553317B (zh) * | 2019-09-25 | 2022-05-17 | 北京大学人民医院(北京大学第二临床医学院) | 一种检测nkg2c基因型的试剂盒与应用 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5976819A (en) * | 1995-11-21 | 1999-11-02 | National Jewish Medical And Research Center | Product and process to regulate actin polymerization in T lymphocytes |
| US5847093A (en) * | 1996-12-27 | 1998-12-08 | Incyte Pharmaceuticals, Inc. | Human apoptosis regulator |
| FR2769921B1 (fr) * | 1997-10-20 | 2000-08-18 | Inst Nat Sante Rech Med | Moyens de documentation de repertoires en immunorecepteurs nkr et/ou en immunorecepteurs contreparties activatrices ou non inhibitrices d'immunorecepteurs nkr |
-
1997
- 1997-10-20 FR FR9713115A patent/FR2769921B1/fr not_active Expired - Fee Related
-
1998
- 1998-10-20 WO PCT/FR1998/002244 patent/WO1999020794A1/fr not_active Application Discontinuation
- 1998-10-20 EP EP98950162A patent/EP1017854A1/fr not_active Withdrawn
- 1998-10-20 US US09/529,759 patent/US20020192644A1/en not_active Abandoned
- 1998-10-20 CA CA002306445A patent/CA2306445A1/fr not_active Abandoned
- 1998-10-20 JP JP2000517112A patent/JP2002510461A/ja active Pending
-
2003
- 2003-08-04 US US10/633,771 patent/US20040259103A1/en not_active Abandoned
-
2005
- 2005-04-12 US US11/104,353 patent/US20050191695A1/en not_active Abandoned
Non-Patent Citations (6)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2858631A1 (fr) * | 2004-09-24 | 2005-02-11 | Centre Nat Rech Scient | Procede de detection et d'identification de la presence de matieres biologiques provenant de poissons, et oligonucleotides pour sa mise en oeuvre |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2769921B1 (fr) | 2000-08-18 |
| EP1017854A1 (fr) | 2000-07-12 |
| US20040259103A1 (en) | 2004-12-23 |
| JP2002510461A (ja) | 2002-04-09 |
| FR2769921A1 (fr) | 1999-04-23 |
| US20050191695A1 (en) | 2005-09-01 |
| CA2306445A1 (fr) | 1999-04-29 |
| US20020192644A1 (en) | 2002-12-19 |
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