COL2A1 antibodies vary in host species, clonality, reactivity, and applications. Below is a comparative table of notable products:
COL2A1 antibodies have been instrumental in elucidating mechanisms of chondrocyte hypertrophy and OA progression:
Suppression of Hypertrophy: COL2A1 inhibits chondrocyte hypertrophy by disrupting BMP-SMAD1 signaling. In Col2a1 p.Gly1170Ser mutant mice, COL2A1 loss accelerates hypertrophy via upregulated BMP-SMAD1 activity .
Disease-Amplifying Loop: Degradation of COL2A1 in OA cartilage reduces its ability to suppress BMP-SMAD1, creating a feedback loop that exacerbates cartilage destruction .
Melanoma: COL2A1 is a biomarker for melanoma tumor-repopulating cells (TRCs), showing ~20-fold higher expression in TRCs compared to parental cells. Immunofluorescence confirms elevated COL2A1 protein levels in TRCs .
CIIC1 (DSHB): Targets the triple-helical ARGLT motif (aa 359-363 in humans) .
PA2141-1 (Boster Bio): Binds a C-terminal peptide (mouse Collagen II 1222-1241aa) .
Species-Specific: PA2141-1 reacts only with mouse and rat , while bs-10589R detects human, mouse, rat, and rabbit .
Non-Cross-Reactive: PA2141-1 shows no cross-reactivity with other proteins .
Picoband® (PA2141-1): Guarantees high affinity and low background in WB .
Abcam’s ab34712: Validated across 8+ species and widely cited .
Monoclonal (CIIC1, II-II6B3): Ideal for detecting conformational epitopes in native collagen II .
Polyclonal (PA2141-1, bs-10589R): Suitable for linear epitopes across denatured samples .