Anti-Mouse CD279 (PD-1) [Clone 29F.1A12] — Purified in vivo GOLD™ Functional Grade

Anti-Mouse CD279 (PD-1) [Clone 29F.1A12] — Purified in vivo GOLD™ Functional Grade

Product No.: P377

[product_table name="All Top" skus="P377"]

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Clone
29F.1A12
Target
PD-1
Formats AvailableView All
Product Type
Monoclonal Antibody
Alternate Names
Programmed Death-1, CD279
Isotype
Rat IgG2a
Applications
B
,
CyTOF®
,
FC
,
IHC FF
,
in vivo
,
PhenoCycler®
,
WB

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Select Product Size

Data

P377-c
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Antibody Details

Product Details

Reactive Species
Mouse
Host Species
Rat
Recommended Isotype Controls
Recommended Dilution Buffer
Immunogen
PD-1 cDNA followed by PD-1-Ig fusion protein
Product Concentration
≥ 5.0 mg/ml
Endotoxin Level
< 1.0 EU/mg as determined by the LAL method
Purity
≥95% monomer by analytical SEC
>95% by SDS Page
Formulation
This monoclonal antibody is aseptically packaged and formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.2 - 7.4 with no carrier protein, potassium, calcium or preservatives added. Due to inherent biochemical properties of antibodies, certain products may be prone to precipitation over time. Precipitation may be removed by aseptic centrifugation and/or filtration.
Product Preparation
Functional grade preclinical antibodies are manufactured in an animal free facility using in vitro cell culture techniques and are purified by a multi-step process including the use of protein A or G to assure extremely low levels of endotoxins, leachable protein A or aggregates.
Storage and Handling
Functional grade preclinical antibodies may be stored sterile as received at 2-8°C for up to one month. For longer term storage, aseptically aliquot in working volumes without diluting and store at ≤ -70°C. Avoid Repeated Freeze Thaw Cycles.
Country of Origin
USA
Shipping
Next Day 2-8°C
Additional Applications Reported In Literature ?
CyTOF®
Each investigator should determine their own optimal working dilution for specific applications. See directions on lot specific datasheets, as information may periodically change.

Description

Description

Specificity
Clone 29F.1A12 recognizes an epitope on mouse PD-1.
Background
PD-1 is a 50-55 kD member of the B7 Ig superfamily. PD-1 is also a member of the extended CD28/CTLA-4 family of T cell regulators and is suspected to play a role in lymphocyte clonal selection and peripheral tolerance. The ligands of PD-1 are PD-L1 and PD-L2, and are also members of the B7 Ig superfamily. PD-1 and its ligands negatively regulate immune responses. PD-L1, or B7-Homolog 1, is a 40 kD type I transmembrane protein that has been reported to costimulate T cell growth and cytokine production. The interaction of PD-1 with its ligand PD-L1 is critical in the inhibition of T cell responses that include T cell proliferation and cytokine production. PD-L1 has increased expression in several cancers. Inhibition of the interaction between PD-1 and PD-L1 can serve as an immune checkpoint blockade by improving T-cell responses In vitro and mediating preclinical antitumor activity. Within the field of checkpoint inhibition, combination therapy using anti-PD1 in conjunction with anti-CTLA4 has significant therapeutic potential for tumor treatments. PD-L2 is a 25 kD type I transmembrane ligand of PD-1. Via PD-1, PD-L2 can serve as a co-inhibitor of T cell functions. Regulation of T cell responses, including enhanced T cell proliferation and cytokine production, can result from mAbs that block the PD-L2 and PD-1 interaction.
Antigen Distribution
PD-1 is expressed on a subset of CD4-CD8- thymocytes, and on activated T and B cells.
Ligand/Receptor
B7-H1 (PD-L1) and B7-DC (PD-L2)
Function
Lymphocyte clonal selection, peripheral tolerance
NCBI Gene Bank ID
Research Area
Cancer
.
Immunology
.
Inhibitory Molecules

Leinco Antibody Advisor

Powered by AI: AI is experimental and still learning how to provide the best assistance. It may occasionally generate incorrect or incomplete responses. Please do not rely solely on its recommendations when making purchasing decisions or designing experiments.

Clone 29F.1A12 is a rat anti-mouse PD-1 monoclonal antibody widely used in in vivo mouse studies to block the interaction between PD-1 and its ligands, typically as a tool to study immune checkpoint blockade therapy.

In these studies, 29F.1A12 is used to:

  • Enhance anti-tumor immune responses and investigate the role of PD-1 signaling in various cancer and chronic infection mouse models.
  • Serve as a functional blocking antibody that interrupts PD-1-mediated inhibitory signaling on T cells, thereby promoting T cell activity against tumors.
  • Be combined with other immunotherapies to assess combinatorial anti-cancer effects or mechanisms underlying checkpoint blockade.
  • Characterize PD-1 expression by flow cytometry or immunohistochemistry in mouse tissues or immune cell subsets, demonstrating specificity for mouse PD-1 both on T cells and, in specific contexts, on tumor cells.

Typical experimental protocols include:

  • Intraperitoneal or intravenous injection of the antibody at defined doses and schedules, e.g., biweekly, in models such as melanoma or genetically engineered cancer-prone mice.
  • Measuring outcomes such as tumor growth delay, survival extension, T cell activation, and changes in tumor immune infiltration.
  • Detecting PD-1 surface protein on live T cells or tumor cells via flow cytometry, with the 29F.1A12 clone having defined specificity for PD-1 (and showing high-intensity staining compared to other clones).

Considerations:

  • The 29F.1A12 clone has been rigorously characterized for in vivo use, offering proven efficacy in diverse disease models.
  • It is also used to dissect mechanistic aspects of PD-1 blockade, such as which immune subsets are affected and how blocking PD-1 alters disease progression.
  • Notably, there are documented differences in efficacy between anti-PD-1 clones across mouse models; for example, 29F.1A12 showed variable effects in DNA polymerase mutator syndromes and may perform differently than other commonly used clones like RMP1-14 in some models.

In summary, clone 29F.1A12 is a gold-standard tool for in vivo PD-1 blockade in mice, supporting functional studies of immune modulation, cancer immunotherapy, and basic T-cell biology.

The correct storage temperature for sterile packaged clone 29F.1A12 is 2 to 8°C as supplied; it must not be frozen.

Further details:

  • For most applications—including flow cytometry or preclinical/research use—store the antibody undiluted at 2–8°C in a refrigerator, protected from light if conjugated, and avoid repeated freeze-thaw cycles.
  • For functional grade preclinical antibodies, short-term storage (up to one month) is at 2–8°C; for long-term storage, aseptically aliquot (without dilution) and store at ?-70°C. However, do not freeze unless specifically stated as suitable, as most manufacturers advise against freezing to avoid loss of activity, particularly for sterile working solutions.
  • Always check the manufacturer's supplied product sheet for any clone-specific exceptions, but for clone 29F.1A12 supplied sterile in buffer, the consensus is 2 to 8°C, do not freeze.

If your product is a sterile, working solution packaged for research (not an unconjugated purified bulk for long-term archive), use 2–8°C storage conditions.

Commonly Used Antibodies and Proteins Co-Used with 29F.1A12 in Literature

29F.1A12 is a monoclonal antibody targeting mouse PD-1, commonly used in research to block the PD-1/PD-L1 pathway and study its role in immune regulation and cancer biology. Several other antibodies and proteins are frequently used alongside 29F.1A12 in experimental setups, especially in flow cytometry, in vitro blocking assays, and co-staining experiments.

Common Companion Antibodies

Co-Staining with Other PD-1 Antibodies

  • RMP1-30: Frequently used for flow cytometric analysis of PD-1 surface expression, often in co-staining experiments with 29F.1A12 to validate PD-1 expression on various cell types such as melanoma cells and T cells. The two antibodies show overlapping positivity, indicating they recognize similar PD-1 epitopes or populations.
  • RMP1-14: Another anti-mouse PD-1 antibody, sometimes used in parallel with 29F.1A12, especially for comparison of blocking efficacy and binding affinity. 29F.1A12 generally demonstrates higher affinity and more effective blockade of PD-1/PD-L1 interactions compared to RMP1-14.
  • 384-35: A fully murinized anti-mouse PD-1 antibody, commercially available and sometimes mentioned in the context of PD-1 research, though less commonly cited in direct comparison with 29F.1A12.

Blocking PD-L1 Interactions

  • Recombinant PD-L1 (rPD-L1): Used in functional assays to test the blocking ability of 29F.1A12. Flow cytometry experiments often involve adding recombinant PD-L1 to cells, then measuring binding in the presence or absence of 29F.1A12 to validate PD-1 blockade.
  • PD-L2: Sometimes included in assays to test the specificity of PD-1 blockade, although major studies primarily focus on PD-L1.

Co-Use with Anti-PD-L1 Antibodies

  • 10F.9G2 and MIH6: These are anti-mouse PD-L1 antibodies used to study the PD-1/PD-L1 pathway. While not directly co-stained with 29F.1A12, they are used in parallel studies for pathway blockade and to model the effects of human PD-1 therapeutics in mouse systems.
  • Functional Blockade Assays: Experiments often involve combining PD-1 (29F.1A12, RMP1-14, RMP1-30) and PD-L1 (10F.9G2, MIH6) antibodies to assess their ability to reverse PD-1-mediated inhibition of TCR/CD28 signaling.

Typical Experimental Approaches

Antibody/ProteinCommon Use with 29F.1A12Purpose
RMP1-30Co-staining in flow cytometryValidation of PD-1 surface expression
RMP1-14Comparison in blocking assaysAssess PD-1 blockade efficacy
Recombinant PD-L1Functional assaysTest PD-1 blocking by 29F.1A12
10F.9G2 / MIH6Parallel PD-L1 blockadeStudy full pathway inhibition
PD-L2Specificity assays (less common)Test broader PD-1 ligand interactions

Summary

In the literature, 29F.1A12 is most frequently used alongside other anti-PD-1 antibodies like RMP1-30 (for co-staining and validation) and RMP1-14 (for comparative blocking studies). Functional experiments often include recombinant PD-L1 to assess blockade efficacy, while parallel studies may use anti-PD-L1 antibodies such as 10F.9G2 and MIH6 to model comprehensive pathway inhibition. These combinations are standard in preclinical research aiming to dissect the PD-1/PD-L1 axis and evaluate potential therapeutic interventions.

The 29F.1A12 anti-PD-1 antibody clone has emerged as a significant research tool in immunotherapy studies, with several key findings documented across scientific literature.

Specificity and Detection Properties

The 29F.1A12 clone demonstrates robust specificity for mouse PD-1, recognizing a specific epitope on the PD-1 protein. Flow cytometric analyses have shown that this clone effectively detects PD-1 surface protein expression on live murine cells, with particularly high reactivity observed on activated T-cells (52.2 ± 7.9%) compared to unactivated T-cells (6.0 ± 1.5%). Importantly, the clone shows minimal cross-reactivity with PD-1 knockout cells, confirming its specificity for live cells while showing lesser specificity for dead cells.

Functional Blocking Activity

A critical finding is that 29F.1A12 functions as a blocking antibody that prevents PD-1 from interacting with its ligand PD-L1. This blocking capability is so comprehensive that it completely prevents PD-1 detection by nearly all other antibody clones when used in competition assays. The antibody's blocking function translates into therapeutic potential, as it can inhibit B16-F10 melanoma growth in three-dimensional tumor spheroid cultures, though notably not in standard two-dimensional cultures.

Clone Comparison and Overlap

When compared to other anti-PD-1 clones like RMP1-30, the 29F.1A12 antibody shows the brightest staining intensity among tested clones. Co-staining experiments reveal that 29F.1A12 and RMP1-30 recognize overlapping cell subpopulations, with dual positivity observed in nearly all PD-1-reactive melanoma cells (90.8-96.7%) and T-cells (48.1-57.2%).

Culture Condition Sensitivity

A notable finding is that both 29F.1A12 and RMP1-30 reactivity increases more than 3-fold in three-dimensional versus two-dimensional culture conditions. This suggests that PD-1 expression levels vary significantly depending on the cellular environment, which has important implications for experimental design and therapeutic applications.

Variable Therapeutic Efficacy

In preclinical studies, 29F.1A12 has shown differential efficacy across genetic contexts. While the clone demonstrated initial benefits in delaying cancer onset and improving survival in certain mouse models (such as Pole L424V mutant mice), it showed variable or limited effects in other genetic backgrounds compared to alternative clones like RMP-14. This variability highlights the importance of clone selection based on specific experimental contexts and genetic models.

Technical Considerations

An important caveat identified in the literature is that PD-1-specific blocking antibodies like 29F.1A12 can deplete PD-1+ T cells, presenting a potential confounding variable in preclinical immunotherapy experiments. This depletion effect must be considered when interpreting experimental results and designing studies.

The collective findings establish 29F.1A12 as a highly specific, functionally active anti-PD-1 antibody with strong blocking capabilities, but researchers should carefully consider its variable efficacy across different experimental contexts and potential for T-cell depletion when designing studies.

References & Citations

1.) Ardolino, M. et al. (2018) J Clin Invest. 128(10):4654-4668. PubMed
2.) Schreiber, RD. et al. (2017) Cancer Immunol Res. 5(2):106-117.
3.) Honjo, T. et al. (1992) EMBO J. 11:3887.
4.) Wurster S. et al. (2020) The Journal of Infectious Diseases 222(6):1989–994 Journal Link
5.) Lo, R. et al. (2021) Cancer Cell 39(10):1375-1387.e6 Journal Link
B
CyTOF®
Flow Cytometry
IHC FF
in vivo Protocol
PhenoCycler®
General Western Blot Protocol

Certificate of Analysis

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Formats Available

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Disclaimer AlertProducts are for research use only. Not for use in diagnostic or therapeutic procedures.