Anti-Mouse/Rat CD71 [Clone OX-26] — Purified in vivo GOLD™ Functional Grade

Anti-Mouse/Rat CD71 [Clone OX-26] — Purified in vivo GOLD™ Functional Grade

Product No.: C853

[product_table name="All Top" skus="C371"]

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Clone
OX-26
Target
CD71
Formats AvailableView All
Product Type
Monoclonal Antibody
Isotype
Mouse IgG2a
Applications
FC
,
IHC
,
in vivo

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Antibody Details

Product Details

Reactive Species
Mouse
Rat
Host Species
Mouse
Recommended Isotype Controls
Recommended Dilution Buffer
Product Concentration
≥ 5.0 mg/ml
Endotoxin Level
<1.0 EU/µg 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 7.0-7.5, 0.005% pS80 stabilizing buffer, 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
Applications and Recommended Usage?
Quality Tested by Leinco
FC
IHC
Additional Applications Reported In Literature ?
IHC
FC
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 OX-26 reacts with rat CD71 (TfR1).
Background
CD71 is a transferrin receptor on the cell surface that mediates the uptake of transferrin-iron complexes, thereby mediating cellular proliferation1. CD71 is a homodimeric glycoprotein containing 760 amino acids and it binds to diferric transferrin2. Binding by diferric transfferin causes CD71 to be internalized, and diferric iron is subsequently released3. CD71 is highly expressed on malignant cells, as iron uptake is necessary for aberrant cell proliferation4.
Antigen Distribution
CD71 is expressed on the surface of proliferating cells, reticulocytes, and erythroid precursors.
Research Area
Immunology

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 OX-26 is a monoclonal antibody that targets the transferrin receptor (CD71), primarily recognizing rat CD71, but variants and formulations have also been engineered to cross-react with mouse CD71. The antibody is widely used in experimental settings involving rats, and in some cases, mice.

Common in vivo applications of clone OX-26 in mice include:

  • Targeted brain drug delivery: Clone OX-26 is utilized to exploit the transferrin receptor's ability to mediate transcytosis across the blood-brain barrier (BBB) for delivering therapeutics, nanoparticles, or imaging agents into the mouse brain. However, OX-26 was originally designed for rat CD71, and its efficiency for BBB transport in mice is significantly lower than rat-specific antibodies (such as clone 8D3).
  • Flow cytometry and immunophenotyping: Conjugated OX-26 antibodies are used to identify and sort proliferating cells or erythroid precursors in mouse tissue, based on CD71 expression.
  • Examining iron metabolism and proliferative cell populations: Since CD71 plays a central role in iron uptake, OX-26 can be employed to study iron metabolism, erythropoiesis, and malignant cell proliferation in vivo.
  • Immunoelectron microscopy: For ultrastructural localization of CD71, OX-26 has been used to map its expression on brain capillary endothelium and other mouse tissues.

Key technical constraints and notes:

  • Species specificity: Although some vendors report that OX-26 cross-reacts with mouse CD71, the affinity and in vivo activity of OX-26 in mice are much lower compared to specialized mouse-specific anti-CD71 antibodies like clone 8D3. The absence of high affinity can significantly reduce the effectiveness of OX-26 for brain delivery applications in mice.
  • Controls and non-specific effects: In studies where OX-26 is used in vivo in mice, appropriate controls are essential, as differences in affinity and receptor distribution can alter results.

Summary Table: OX-26 in Mouse In Vivo Applications

ApplicationSuitability in MiceNotes
Brain drug delivery / BBB targetingLimited (low affinity for mouse CD71)8D3 is preferred for mouse BBB targeting
Flow cytometry / ImmunophenotypingSupported (some cross-reactivity)Used for proliferating cells/erythroid precursors
Iron metabolism / Erythropoiesis studiesSupportedDue to CD71 role in iron uptake
Immunoelectron microscopySupported (when cross-reactivity is sufficient)Direct visualization of CD71 distribution

In summary, OX-26 is mainly used for rat studies, with some application in mice when cross-reactivity is adequate—especially for flow cytometry and studies of proliferative cells. For targeted drug delivery across the mouse BBB, clone 8D3 or engineered mouse-reactive antibodies are much more effective.

In the literature, several other antibodies or proteins are commonly used alongside OX-26 for various research purposes:

  1. A20.1: This is a single-domain antibody against Clostridium difficile toxin B, often used as a control in studies involving OX-26 to assess non-specific transport across the blood-brain barrier (BBB).

  2. Methotrexate (MTX): OX-26 is sometimes conjugated with MTX to deliver drugs across the BBB. This conjugate is used in studies to demonstrate how OX-26 facilitates drug delivery into the brain.

  3. NiP228: A control IgG used in experiments to compare the efficiency of OX-26 variants in crossing the BBB. NiP228 does not bind mammalian receptors, which makes it useful for demonstrating specific vs. non-specific transport.

  4. UPC10: Another control antibody used in some studies for comparison purposes, known for its lack of binding to specific receptors.

  5. Polyethyleneglycol-coated liposomes: These have been used in conjunction with OX-26 to explore drug delivery mechanisms by conjugating OX-26 to these liposomes for enhanced uptake by brain capillary endothelial cells.

The clone OX-26 antibody is a well-characterized mouse monoclonal antibody that specifically targets the rat CD71 (transferrin receptor protein 1, TfR1). Key findings from scientific literature regarding clone OX-26 include:

  1. Reactivity and Cross-Reactivity: The OX-26 antibody reacts with rat CD71 and exhibits cross-reactivity with mouse CD71. This makes it useful for studying the role of the transferrin receptor in both rat and mouse models.

  2. Cellular Uptake and Iron Import: CD71 is involved in the endocytosis of transferrin, facilitating iron uptake into cells. It is highly expressed on proliferating cells, erythroid precursors, and malignant cells, making it a target for drug delivery.

  3. Blood-Brain Barrier Penetration: The OX-26 antibody can be used to transport drugs across the blood-brain barrier (BBB) via the endogenous transferrin transport system. This property is exploited in experimental rat models for targeted brain drug delivery.

  4. Applications in Research: OX-26 is commonly used in flow cytometry for analyzing cell surface expression of CD71. Its agonist activity also makes it useful for studying cellular responses to transferrin receptor engagement.

  5. Recombinant Versions: Bio X Cell offers recombinant versions of the OX-26 antibody, including chimeric and Fc-silenced variants, which are useful for reducing immunogenicity and controlling effector functions in animal models.

The search results do not provide specific information on the dosing regimens of clone OX-26 across different mouse models. However, they highlight the use of OX-26, a monoclonal antibody targeting the transferrin receptor, in delivering substances across the blood-brain barrier in rat models rather than mouse models specifically.

For mouse models, dosing regimens can vary significantly based on the specific research goals, model characteristics, and the drugs or substances being studied. For example, dosing strategies for other compounds like oxaliplatin in mouse models have been documented, where the total human equivalent dose (THED) varies from 0.04 to 10 mg/kg/day, and cumulative doses range from 3 to 30 mg/kg. However, this information is not directly applicable to OX-26 dosing.

If OX-26 is used in mouse models, the dosing would likely depend on factors such as the specific application (e.g., drug delivery or immunological studies), the model's genetic background, and whether the model is used for studying neurological or other diseases. Researchers typically consult guidelines for in vivo antibody dosing in mouse models to optimize dosing strategies.

In summary, while there is no specific information on OX-26 dosing regimens in mouse models, researchers would typically need to design and optimize these regimens based on the specific requirements of their study model.

References & Citations

1. Aisen P. Int J Biochem Cell Biol. Nov;36(11):2137-43. 2004.
2. Lawrence CM, Ray S, Babyonyshev M, et. al. Science. Oct 22;286(5440):779-82. 1999.
3. Marsee DK, Pinkus GS, Yu H. Am J Clin Pathol. Sep;134(3):429-35. 2010.
4. Candelaria PV, Leoh LS, Penichet ML, Daniels-Wells TR. Front Immunol. Mar 17;12:607692. 2021
5. Jiménez E, Sacedón R, Vicente A, et. al. J Immunol. May 15;168(10):5005-13. 2002.
6. Fabriek BO, Polfliet MM, Vloet RP, et. al. Blood. Jun 15;109(12):5223-9. 2007.
Flow Cytometry
IHC
in vivo Protocol

Certificate of Analysis

Formats Available

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