Stromal interaction molecule 1 (STIM1) mRNA (STIM1 mRNA)

Stromal interaction molecule 1 (STIM1) mRNA is the messenger RNA transcript that encodes the STIM1 protein, a key calcium sensor residing in the endoplasmic reticulum (ER) membrane [2]. STIM1 is essential for store-operated calcium entry (SOCE), a mechanism where the depletion of ER calcium stores triggers STIM1 to oligomerize and activate Orai1 calcium channels on the plasma membrane [3, 12]. This influx of calcium is a fundamental signaling event that regulates diverse cellular functions, including gene transcription, cell proliferation, and immune cell activation [1, 6]. In many cancers, STIM1 mRNA is overexpressed, promoting tumor growth, survival, and metastasis, which makes it an attractive target for gene-silencing therapies [4, 8]. Experimental approaches using small interfering RNAs (siRNAs) and microRNAs (such as miR-185) have demonstrated the potential to suppress STIM1 expression and inhibit pathological calcium signaling [1, 10]. However, because STIM1 is also critical for normal physiological processes in the immune system and skeletal muscle, therapeutic strategies must carefully manage the risk of systemic toxicity and off-target effects [3, 5].

Other names

GOK mRNASTRML mRNASTIM1 transcript

The primary mechanism of action for drugs targeting STIM1 mRNA involves RNA interference (RNAi) or antisense inhibition [7, 9]. Small interfering RNAs (siRNAs) or antisense oligonucleotides (ASOs) bind to the STIM1 mRNA transcript through complementary base pairing, leading to its degradation or the physical blocking of the translation machinery [10]. This results in a significant reduction in STIM1 protein levels, which subsequently prevents the activation of store-operated calcium entry (SOCE) and inhibits downstream calcium-dependent signaling pathways involved in disease progression [1, 8].