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Hybridomas

Hybridomas are a type of immortalized cell line created by fusing a B lymphocyte with a myeloma cell.
These hybrid cells produce large quantities of a specific monoclonal antibody, making them invaluable tools for biomedical research and therapeutic development.
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Most cited protocols related to «Hybridomas»

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Publication 2015
Antibodies Antibodies, Anti-Idiotypic Astrocytes Brain Cell Culture Techniques Cells Endothelial Cells Fetus Gray Matter Homo sapiens Hybridomas Hyperostosis, Diffuse Idiopathic Skeletal Lectin Lysine Macrophage Microglia Neurons Oligodendrocyte Precursor Cells Oligodendroglia Papain Poly A Protease Inhibitors RNA-Seq Serum Thy-1 Antigens Tissues Trypsin
Outbred Ekkwill strain (EK) or EK/AB mixed background zebrafish 6–12 months of age were used for ventricular resection surgeries as described previously4 (link). All transgenic strains were analyzed as hemizygotes; details of their construction are described in the separate Methods section. Animal density was maintained at ~4 fish/liter in all experiments. 4-hydroxytamoxifen (4-HT) (Sigma) dissolved with ethanol (5 mg/ml) was diluted in water to 0.5 mg/ml for intraperitoneal injections. 10% ethanol was used as a vehicle control. EGFP labeling quantification is described in the separate Methods section. Heat-shock experiments were performed as described previously27 (link), using double transgenic hsp70:dnfgfr1; cmlc2:nucDsRed2 or hsp70:dnfgfr1; gata4:EGFP animals. For BrdU incorporation experiments, 2.5 mg/ml BrdU (Sigma) was injected intraperitoneally once daily for 3 days prior to collection. Immunofluorescence, in situ hybridization, and Acid Fuchsin Orange G stains (detecting fibrin and collagen) were performed as described previously4 (link). Primary antibodies used in this study were: anti-Mef2 (rabbit; Santa Cruz Biotechnology), anti-Myosin heavy chain (F59, mouse; Developmental Studies Hybridoma Bank), anti-β-catenin (rabbit; Sigma), anti-zf Raldh2 (rabbit: Abmart), anti-BrdU (rat; Accurate), and anti-GFP (rabbit, used only for co-detection with BrdU; Invitrogen). Secondary antibodies (Invitrogen) used in this study were Alexa Fluor 594 goat anti-rabbit IgG (H+L) for anti-Mef2, Alexa Fluor 594 goat anti-mouse IgG (H+L) for F59, Alexa Fluor 594 goat anti-rat IgG (H+L) for anti-BrdU, and Alexa Fluor 488 goat anti-rabbit IgG (H+L) for anti-GFP. In situ hybridization and immunofluorescence images were taken using a Leica DM6000 microscope with a Retiga-EXi camera (Q-IMAGING), and confocal images were taken using a Leica SP2 or SP5 confocal microscope. Physiology methods are described in the separate Methods section.
Publication 2010
acid-fuchsin afimoxifene ALDH1A2 protein, human Alexa594 alexa fluor 488 Animals Animals, Transgenic anti-IgG Antibodies Bromodeoxyuridine Collagen CTNNB1 protein, human Ethanol Fibrin Fishes Fluorescent Antibody Technique Goat Heart Ventricle Heat-Shock Proteins 70 Heat-Shock Response Hemizygote Hybridomas Injections, Intraperitoneal In Situ Hybridization Mice, House Microscopy Microscopy, Confocal Myosin Heavy Chains Operative Surgical Procedures Orange G physiology Rabbits Staining Strains Zebrafish
Astrocytes were purified by immunopanning from postnatal day 5 rats or mice (see above) forebrains and cultured as previously described18 (link). Briefly, cortices were enzymatically (papain) then mechanically dissociated to generate a single cell suspension that was incubated on successive negative immunopanning plates to remove microglia, endothelial cells, and oligodendrocyte lineage cells before positively selecting for astrocytes with an Itgb5-coated panning plate. Isolated astrocytes were cultured in a defined, serum-free base media containing 50% neurobasal, 50% DMEM, 100 U/ml penicillin, 100 μg/ml streptomycin, 1 mM sodium pyruvate, 292 μg/ml L-glutamine, 1× SATO and 5 μg/ml of N-acetyl cysteine. This media was supplemented with the astrocyte-required survival factor HBEGF (Peprotech, 100–47) at 5ng/ml as previously descried18 (link). A similar immunopanning protocol was used for other central nervous system cell types, with positive selection using THY1 (cortical neurons), 192 hybridoma clone (embryonic spinal motor neurons35 (link)), CD31 (endothelial cells36 (link)), O4 (oligodendrocyte lineage cells), PDGFRβ (pericytes37 (link)), CD45 (microglia/macrophages). A1 reactive astrocytes were generated in vitro by growing purified astrocytes for 6 days and then treating for 24 h with Il-1α (3 ng/ml, Sigma, I3901), TNFα (30 ng/ml, Cell Signaling Technology, 8902SF), and C1q (400 ng/ml, MyBioSource, MBS143105).
Publication 2017
Acetylcysteine Astrocytes Cells Central Nervous System Clone Cells Cortex, Cerebral Culture Media, Serum-Free Embryo Endothelial Cells Endothelium Glutamine HBEGF protein, human Hybridomas Macrophage Microglia Mus Neurons Oligodendroglia Papain Penicillins Platelet-Derived Growth Factor beta Receptor Prosencephalon Pyruvate Rattus Sodium Streptomycin Tumor Necrosis Factor-alpha
Equal amounts of recombinant prion proteins (100ng for Figure 5A and 10ng for Figure 5C) were mixed with loading dye and loaded on a 12% NuPAGE gel (Invitrogen, running with MES buffer). Mouse brain homogenates were prepared in PBS, 0.05% sodium deoxycholate, and 0.05% Nonidet P-40. For PK digestion 25 µg/ml of enzyme was used to digest PrPC. Samples corresponding to 40 µg of total proteins (with or without prior PK digestion) were mixed with loading dye and loaded on a 12% NuPAGE gel. Proteins were then transferred onto a nitrocellulose membrane incubated with hybridoma cell supernatant or purified monoclonal anti-PrP antibodies and horseradish peroxidase (HRP)-conjugated rabbit anti-mouse IgG (gamma) antibody (Zymed). For analysis of samples acquired from immunoprecipitation, blots were incubated with a biotinylated anti-PrP (POM1) antibody and HRP-labeled avidin (Pharmingen). Blots were finally incubated with HRP substrate (ECL, Pierce) and exposed on photosensitive film (Kodak) or with Versadoc 3000 imaging system (Bio-Rad).
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Publication 2008
anti-IgG Avidin Brain Buffers Deoxycholic Acid, Monosodium Salt Digestion Enzymes Gamma Rays Horseradish Peroxidase Hybridomas Immunoglobulins Immunoprecipitation Monoclonal Antibodies Mus Nitrocellulose Nonidet P-40 Photosensitization Prions Proteins Rabbits Tissue, Membrane
Total RNA was prepared from NLDC-145 19 and GLII7 (gift of R.J. Hodes, National Institutes of Health, Bethesda, MD) hybridomas (both rat IgG2a) using Trizol (GIBCO BRL). Full-length Ig cDNAs were produced with 5′-RACE PCR kit (GIBCO BRL) using primers specific for 3′-ends of rat IgG2a and Ig kappa. The V regions were cloned in frame with mouse Ig kappa constant regions and IgG1 constant regions carrying mutations that interfere with FcR binding 20. DNA coding for hen egg lysozyme (HEL) peptide 46–61 with spacing residues on both sides was added to the C terminus of the heavy chain using synthetic oligonucleotides. Gene specific primers for cloning of rat IgG2a and Ig kappa: 3′-ATAGTTTAGCGGCCGCGATATCTCACTAACACTCATTCCTGTTGAAGCT; 3′-ATAGTTTAGCGGCCGCTCACTAGCTAGCTTTACCAGGAGAGTGGGAGAG-ACTCTTCT; HEL peptide fragment construction: 5′-CTAGCGACATGGCCAAGAAGGAGACAGTCTGGAGGCTCGAG-GAGTTCGGTAGGTTCACAAACAGGAAC; 5′-acagacgtagcacagactatggtattctccagattaacagcaggtattatgacggtaggacatgataggc; 3′-gctgtaccggttcttcctctgtcagacctccgagctcctcaa-gccatccaagtgtttgtccttgtgtctg; 3′-CCATCGTGTCTGATACCATAAGAGGTCTAATTGTCGTCCATAATACTGCCATCCTGTACTATCCGCCGG.
Hybrid antibodies were transiently expressed in 293 cells after transfection using calcium-phosphate. Cells were grown in serum-free DMEM supplemented with Nutridoma SP (Boehringer). Antibodies were purified on Protein G columns (Amersham Pharmacia Biotech). The concentrations of purified antibodies were determined by ELISA using goat anti–mouse IgG1 (Jackson Immunotech).
Publication 2001
Antibodies Calcium Phosphates Cells DNA, Complementary Enzyme-Linked Immunosorbent Assay G-substrate Genes Goat hen egg lysozyme hen egg lysozyme peptide (46-61) Hybridomas Hybrids IgG1 IgG2A Immunoglobulin Constant Regions Mice, House Mutation Oligonucleotide Primers Oligonucleotides Peptide Fragments Reading Frames Serum Transfection trizol

Most recents protocols related to «Hybridomas»

Example 3

Reactivity of the antibodies of the invention against several species of mesothelin (cyno, rat, mouse) was tested using assays well known in the art. The data is summarized in FIG. 4.

FACS binding assays were performed to evaluate the binding of the anti-Mesothlelin antibodies to murine, rat and cynomologous monkey mesothelin orthologues, using recombinant forms of the various receptors transiently expressed on 293T cells. FACs assays were performed by incubating hybridoma supernatants with 10,000 to 25,000 cells in PBS/2% Fetal bovine serum/2 mM Calcium Chloride at 4° C. for one hour followed by two washes with PBS/2% Fetal bovine serum/2 mM Calcium Chloride. Cells were then treated with florochrome-labeled secondary antibodies at 4° C. followed by one wash. The cells were resuspended in 50 μl of PBS/2% FBS and antibody binding was analyzed using a FACSCalibur™ instrument.

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Patent 2024
Anti-Antibodies Antibodies Biological Assay Calcium chloride Cells Cross Reactions HEK293 Cells Hybridomas Immunoglobulins Mesothelin Monkeys Mus

Example 4

An overview of the immunization strategies for lectin-binding proteins, such as galectin-3, is shown in Table 18.

BALB/c mice were immunized with 2 mg/kg mRNA, complexed with LNPs, or 20 μg recombinant protein as indicated in Table 18. Plasma anti-galectin-3 IgG titers were assayed 7 days after the final boost, which was delivered at day 55.

FIG. 3 shows that the use of galectin-3 mRNA as a final boosting agent resulted in a significantly higher target-specific IgG titer than when purified recombinant protein (a traditional immunogen) was used. This effect was observed regardless of whether the antigens were delivered subcutaneously or intravenously.

Hybridomas producing galectin-3-specific antibodies were generated, and high affinity monoclonal anti-galectin-3 antibodies were obtained from further screens.

TABLE 18
Priming ImmunizationBoostFinal Boost
(Day 0)(Day 7)(Day 55)
mRNA (I.V.)mRNA (I.V.)mRNA (I.V.)
mRNA (I.V.)mRNA (I.V.)Recombinant protein
(I.V.)
mRNA (S.C.)mRNA (S.C.)mRNA (S.C.)
mRNA (S.C.)mRNA (S.C.)Recombinant protein
(S.C.)
Summary of the Hit Rates Attainable by mRNA-Mediated Immunization

Table 19 provides a target protein-specific summary of the total number of hybridoma wells (generally about one third (⅓) of these wells contain hybridomas) screened and the number of confirmed target-specific antibodies obtained from those hybridomas wells following the use of lipid-encapsulated mRNA as an immunogen.

Table 20 provides a comparison of mRNA-LNP immunization methods with other conventional methods of immunization by number of hybridomas producing target-specific antibodies. In general, these data suggest that mRNA-LNP immunization is an effective method for inducing an immune response to a target protein antigen and for obtaining a higher number/rate of target protein-specific antibodies. In particular, these results confirm that mRNA-LNP immunization is surprisingly more effective than conventional immunization methods for obtaining antibodies specific for transmembrane proteins, e.g., multi-pass transmembrane proteins, such as GPCRs, which are difficult to raise antibodies against, and for poorly immunogenic proteins (e.g., proteins which produce low or no detectable target-specific IgGs in plasma of animals immunized with traditional antigen).

TABLE 19
Number of
Number ofhybridomas
hybridomaproducing
Proteinwellstarget-specific
targetType of proteinscreenedantibodies
RXFP1Multi-pass Transmembrane20240207
protein/GPCR
SLC52A2Multi-pass Transmembrane12880228
protein
ANGPTL8Soluble protein22816542
TSHRTransmembraneTBD130
protein/GPCR
APJTransmembrane22080230
protein/GPCR
GP130Single-pass Transmembrane23920614
protein

TABLE 20
Method of immunization and number of hybridomas producing
target-specific antibodies
Whole Virus-likeProtein/
ProteinType ofmRNA-cellsparticlesCDNApeptide
targetproteinLNP1onlyonlyonlyonly
RXFP1GPCR/20766NDNDND
multi-pass
SLC52A2multi-228NSTNSTNDNST
pass
TSHRGPCR/130NDND42413
multi-pass
APJGPCR/230 94621 ND
multi-pass
1Immunization with mRNA-LNP alone or in combination with another antigen format (e.g., protein/peptide).
2Sanders et al. 2002 Thyroid stimulating monoclonal antibodies Thyroid 12(12): 1043-1050.
3Oda et al. 2000. Epitope analysis of the human thyrotropin (TSH) receptor using monoclonal antibodies. Thyroid 10(12): 1051-1059.
ND—Not determined; antigen format not tested
NST—No specific titers detected. Because no target-specific IgG titers were detectable in plasma, hybridoma generation was not initiated on these groups.

In general, successful generation of hybridomas producing antigen-specific antibodies have been achieved for at least 15 different targets utilizing mRNA-LNP immunization methods as exemplified herein. These results show that the mRNA immunization methods described herein are capable of eliciting an immune response against a wide range of antigens (e.g., transmembrane proteins, for example multi-pass transmembrane proteins, such as GPCRs) in host animals, and are effective methods for producing high affinity monoclonal antibodies, which can serve as parentals for generation of chimeric variants, humanized variants, and affinity matured variants.

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Patent 2024
Animals anti-IgG Antibodies Antigens Binding Proteins Cells Chimera DNA, Complementary Epitopes Galectin 3 Histocompatibility Antigens Class II Homo sapiens Hybridomas Integral Membrane Proteins Lectin Lipids Mice, Inbred BALB C Monoclonal Antibodies Parent Peptides Plasma Proteins Protein Targeting, Cellular Recombinant Proteins Response, Immune RNA, Messenger Soluble Glycoprotein 130 Thyroid Gland Thyrotropin Thyrotropin Receptor Vaccination Viral Proteins

Example 7

The development of fully human monoclonal antibodies directed against human IL-17RA was carried out using Abgenix (now Amgen Fremont Inc.) XenoMouse® technology (U.S. Pat. Nos. 6,114,598; 6,162,963; 6,833,268; 7,049,426; 7,064,244, which are incorporated herein by reference in their entirety; Green et al, 1994, Nature Genetics 7:13-21; Mendez et al., 1997, Nature Genetics 15:146-156; Green and Jakobovitis, 1998, J. Ex. Med. 188:483-495)). TABLE 4 shows the portions of the IL-17RA protein used as an immunogen and cell lines used to generate and screen anti-IL-17RA antibodies.

TABLE 4
ReagentDescription
IL-17RA.FcHuman IL-17RA extracellular domain with a
C-terminal human Fc domain. Expressed in a
stable CHO cell line.
IL-17RA-FLAG-polyHisHuman IL-17RA extracellular domain with a
(SEQ ID NO: 431)C-terminal FLAG-polyHis tag. Expressed by
transient transfection in COS PKB cells.
IL-17RA CHO cellsHuman IL-17RA full-length expressed on the
surface of CHO cells.

IgG2 XenoMouse® mice were immunized/boosted with IL-17RA-Fc (group 1) and IL-17RA-FLAG-polyHis (group 2). Serum titers were monitored by ELISA and mice with the best titers were fused to generate hybridomas. The resulting polyclonal supernatants were screened for binding to IL-17RA by ELISA, and the positive supernatants were screened for binding to IL-17RA CHO cells by FMAT. Positive supernatants were subjected to additional screening. IgG2 XenoMouse® mice were immunized with the following immunogens: IL-17RA-Fc (group 3) and IL-17RA-FLAG-pHis (group 4) and were tested following additional immunizations.

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Patent 2024
Anti-Antibodies Antigens Binding Proteins Cell Lines CHO Cells COS Cells Enzyme-Linked Immunosorbent Assay GPI protein, human Homo sapiens Human Development Hybridomas IgG2 IL17RA protein, human Immunization Monoclonal Antibodies Mus Natural Childbirth Proteins Serum Transfection Transients
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Example 1

Antibodies to CD59 and K41 Amadori-modified GCD59 were each generated using CD59 fragments. For anti-K41 Amadori-modified GCD59 antibody preparation, CD59 fragments having Amadori-modified K41 were used. Antibodies were prepared by mouse immunization and development of hybridoma cells from animals exhibiting successful expression of antibodies with high affinity and specificity. Clone H9 was developed as a capture antibody, binding to both glycated and non-glycated CD59. Clones D2 and D3 were developed as detection antibodies, binding to K41 Amadori-modified GCD59. Antibodies were sequenced and analyzed to identify antibody regions. Resulting sequences are provided in Tables 1-7. Antibodies D2 and D3 were found to have heavy and light chains with identical amino acid sequences, but with heavy chain nucleotide sequences differing by a single nucleotide.

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Patent 2024
Amino Acid Sequence Animals Antibodies Antibodies, Anti-Idiotypic Base Sequence CD59 protein, human Clone Cells Hybridomas Immunization Immunoglobulins Light Mice, House Nucleotides

Example 4

Composite MTB peptide vaccines induce antibodies that recognize the conserved MTB Alpha Crystallin HSP epitope (designated as TB Pep01) derived from Mycobacterium tuberculosis H37Rv (NC_000962.2).

Serum antibodies from mice 1433-1436 (see FIG. 26) immunized with 50 ug TB Pep01 CRM-conjugated vaccine demonstrated good responses to the conserved MTB epitope (alpha crystallin HSP), TB Pep01. Mouse 1435 (see FIG. 27), selected for fusion, produced hybridomas LD7 I BB2 and CA6 II GA8 that demonstrated good binding activity to TB Pep01 and TB Pep02 epitopes (FIG. 28). Monoclonal antibodies LD7 I BB2 I B9 and CA6 II GA8 I A5 (hereafter referred to as mAb LD7 and CA6) that were developed from the hybridomas not only bound to TB Pep01, but also to live M. smegmatis (see FIG. 29). Importantly, mAbs LD7 and CA6 promoted opsonophagocytic killing of mycobacteria (see FIGS. 30 and 31).

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Patent 2024
alpha-Crystallins Antibodies Epitopes Figs Hybridomas Monoclonal Antibodies Mus Mycobacterium Mycobacterium tuberculosis H37Rv Serum Vaccines, Conjugate Vaccines, Peptide

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More about "Hybridomas"

Hybridomas are a type of immortalized cell line created by fusing a B lymphocyte with a myeloma cell.
These hybrid cells, also known as monoclonal antibody-producing cells, are invaluable tools for biomedical research and therapeutic development.
They produce large quantities of a specific monoclonal antibody, making them highly versatile and useful in a wide range of applications.
Monoclonal antibodies (mAbs) are a class of antibodies that are produced by a single clone of B cells, recognizing a specific antigen.
Hybridomas are the primary method for generating these mAbs, as they allow for the mass production of a desired antibody.
This technology has revolutionized the field of immunology and has led to advancements in areas such as cancer treatment, disease diagnosis, and targeted drug delivery.
To optimize your Hybridomas research, consider utilizing reagents and tools such as Alexa Fluor 488, a fluorescent dye commonly used for labeling and visualization; Vectashield, a mounting medium that helps preserve fluorescent signals; and DAPI, a nucleic acid stain that can be used to visualize cell nuclei.
Antibodies like Rabbit anti-GFP can also be useful for detecting and quantifying target proteins.
Additionally, the use of cell culture media like Dulbecco's Modified Eagle Medium (DMEM) and the addition of supplements such as Fetal Bovine Serum (FBS) and Penicillin/Streptomycin can help maintain the health and viability of your Hybridomas cultures.
To streamline your Hybridomas research, consider utilizing the AI-driven platform of PubCompare.ai.
This tool can help you locate the most effective protocols from literature, preprints, and patents, as well as identify the best products and procedures to optimize your work.
Experience the future of reproducible Hybridomas research today with PubCompare.ai.