Overexpression of SHC proteins are associated with cancer mitogenesis, carcinogenesis and metastasis. The SHC and its adaptor proteins transmit signaling of the cell surface receptors such as EGFR, erbV-2 and insulin receptors. p52SHC and p46SHC activate the Ras-ERK pathway. p66SHC inhibits ERK1/2 activity and antagonize mitogenic and survival abilities of T-lymphoma Jurkat cell lines. A rise in p66SHC promotes stress induced apoptosis. p66SHC functionally is also involved in regulating oxidative and stress- induced apoptosis – mediating steroid action through the redox signaling pathway. P52SHC and p66SHC have been found in steroid hormone-regulated cancer and metastasizes.
Background References
1. Jelinek HF et al. Human SHC-transforming protein 1 and its isoforms p66shc: A novel marker for prediabetes. J Diabetes Investig. 2021 Oct
2. Huang C et al. The longevity protein p66Shc is required for neonatal heart regeneration. J Mol Cell Cardiol. 2023 Apr
Western blot analysis of SHC on different lysates with Rabbit anti-SHC antibody (HA722564) at 1/1,000 dilution.
Lane 1: Jurkat cell lysate Lane 2: HepG2 cell lysate Lane 3: A431 cell lysate Lane 4: HeLa cell lysate Lane 5: NIH/3T3 cell lysate Lane 6: RAW264.7 cell lysate Lane 7: C6 cell lysate
Lysates/proteins at 20 µg/Lane.
Predicted band size: 63 kDa Observed band size: 66/52/46 kDa
Exposure time: 1 minute 50 seconds; ECL: K1802;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA722564) at 1/1,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
Immunohistochemical analysis of paraffin-embedded human lung cancer tissue with Rabbit anti-SHC antibody (HA722564) at 1/1,000 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA722564) at 1/1,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
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