Calpain-2 is a calcium-dependent cysteine protease that plays important roles in a variety of cellular processes, including migration, adhesion, signal transduction, and apoptosis.
In many cancer types, Calpain-2 is found to be upregulated. Elevated levels of Calpain-2 have been associated with enhanced proteolytic activity, which can contribute to cancer progression by facilitating processes such as cell migration, invasion, and metastasis.
• The increased expression of Calpain-2 in cancer cells can promote the degradation of cytoskeletal and adhesion proteins, thereby aiding in tumor cell detachment and dissemination. This is particularly relevant during epithelial-to-mesenchymal transition (EMT) and remodeling of the extracellular matrix.
• Calpain-2 activity, which is regulated by intracellular Ca²⁺ levels and calpastatin (its endogenous inhibitor), may also influence signal transduction pathways that are critical for cell proliferation and survival. Alterations in these regulatory mechanisms in a tumor setting can amplify Calpain-2’s impact.
Calpain-2 is commonly upregulated in many cancer types, and this increased expression is thought to promote tumor progression by enhancing cellular invasiveness, migration, and survival through its proteolytic actions.
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