Home Primary Antibodies CaSR Antibody [A19J6]

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CaSR Antibody [A19J6]

Cat.No.: F1579

    Application: Reactivity:
    • F1579-IHC1
      Immunohistochemical analysis of formalin fixed paraffin embedded human kidney tissue with F1579 at 1:100 dilution.

    Usage Information

    Dilution
    1:100
    1:2000
    Application
    IHC, FCM
    Reactivity
    Mouse, Human
    Source
    Mouse Monoclonal Antibody
    Storage Buffer
    PBS, pH 7.2+50% Glycerol+0.05% BSA+0.01% NaN3
    Storage (from the date of receipt)
    -20°C (avoid freeze-thaw cycles), 2 years
    Positive Control Rat brain cerebral cortex tissue; Mouse stomach tissue; Human brain tissue; Human kidney tissue; SH-SY5Y cells
    Negative Control

    Experimental Methods

    IHC
    Experimental Protocol：
     
    Deparaffinization/Rehydration
    1. Deparaffinize/hydrate sections:
    2. Incubate sections in three washes of xylene for 5 min each.
    3. Incubate sections in two washes of 100% ethanol for 10 min each.
    4. Incubate sections in two washes of 95% ethanol for 10 min each.
    5. Wash sections two times in dH2O for 5 min each.
    6.Antigen retrieval: For Citrate: Heat slides in a microwave submersed in 1X citrate unmasking solution until boiling is initiated; continue with 10 min at a sub-boiling temperature (95°-98°C). Cool slides on bench top for 30 min.
     
    Staining
    1. Wash sections in dH2O three times for 5 min each.
    2. Incubate sections in 3% hydrogen peroxide for 10 min.
    3. Wash sections in dH2O two times for 5 min each.
    4. Wash sections in wash buffer for 5 min.
    5. Block each section with 100–400 µl of blocking solution for 1 hr at room temperature.
    6. Remove blocking solution and add 100–400 µl primary antibody diluent in to each section. Incubate overnight at 4°C.
    7. Remove antibody solution and wash sections with wash buffer three times for 5 min each.
    8. Cover section with 1–3 drops HRPas needed. Incubate in a humidified chamber for 30 min at room temperature.
    9. Wash sections three times with wash buffer for 5 min each.
    10. Add DAB Chromogen Concentrate to DAB Diluent and mix well before use.
    11. Apply 100–400 µl DAB to each section and monitor closely. 1–10 min generally provides an acceptable staining intensity.
    12. Immerse slides in dH2O.
    13. If desired, counterstain sections with hematoxylin.
    14. Wash sections in dH2O two times for 5 min each.
    15. Dehydrate sections: Incubate sections in 95% ethanol two times for 10 sec each; Repeat in 100% ethanol, incubating sections two times for 10 sec each; Repeat in xylene, incubating sections two times for 10 sec each.
    16. Mount sections with coverslips and mounting medium.
     

    Datasheet & SDS

    Biological Description

    Specificity
    CaSR Antibody [A19J6] detects endogenous levels of total CaSR protein.
    Subcellular Location
    Cell membrane, Membrane
    Uniprot ID
    P41180
    Clone
    A19J6
    Synonym(s)
    GPRC2A; PCAR1; CASR; Extracellular calcium-sensing receptor; CaR; CaSR; hCasR; Parathyroid cell calcium-sensing receptor 1; PCaR1
    Background
    The calcium-sensing receptor (CaSR) is a class C G protein–coupled receptor that functions as an extracellular calcium sensor, translating changes in ionized calcium concentration into coordinated endocrine and renal responses. It contains a large extracellular Venus flytrap domain that binds calcium and other polycations, a cysteine‑rich region, and a seven‑transmembrane domain that couples predominantly to Gq/11 and Gi/o proteins. Activation of Gq/11 triggers phospholipase Cβ, leading to inositol trisphosphate–mediated calcium mobilization and diacylglycerol–dependent activation of protein kinase C, while Gi/o coupling suppresses adenylate cyclase and lowers cAMP levels. In parathyroid chief cells, increased extracellular calcium engages CaSR to inhibit parathyroid hormone (PTH) secretion and promote PTH internalization, establishing a major negative feedback loop for systemic calcium homeostasis. In the kidney, CaSR signaling in the thick ascending limb and collecting duct influences calcium and magnesium reabsorption, phosphate handling, and urine concentration by interacting with transporters such as NKCC2, ROMK, and ENaC, and by intersecting with MAPK and mTOR pathways that modulate cell growth and tubular function. CaSR‑dependent signaling also contributes to regulation of vitamin D metabolism and bone turnover through its effects on PTH and downstream endocrine axes. Germline loss‑of‑function mutations in CaSR cause familial hypocalciuric hypercalcemia and neonatal severe hyperparathyroidism, characterized by elevated serum calcium and inappropriately normal or high PTH, whereas gain‑of‑function mutations lead to autosomal dominant hypocalcemia with low calcium and suppressed PTH.
    References
    • https://pubmed.ncbi.nlm.nih.gov/30443043/
    • https://pubmed.ncbi.nlm.nih.gov/20729338/

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