ArticleNeoplasia (New York, N.Y.)2025
Expression of the cholesterol transporter SR-B1 in melanoma cells facilitates inflammatory signaling leading to reduced cholesterol synthesis.
Article in Neoplasia (New York, N.Y.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Single-Cell RNA-Sequencing Reveals Tumor Microenvironment Composition and Prior Therapy Modulate Response to Axl Inhibition.Cellular and molecular bioengineering · 2026Article
- RORα: a critical nexus in the crosstalk between cholesterol metabolism and macrophage polarization.Frontiers in immunology · 2026Review
- Single-cell profiling deciphering cholesterol metabolism dysregulation in metastatic uveal melanoma and implicating SLC45A2 in its prognosis.Frontiers in immunology · 2025Article
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Authors and funding
9 authors.
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Abstract
Scavenger receptor class B type 1 (SR-B1) is a cholesterol transporter, abundantly expressed in human melanoma, yet its precise role for melanoma progression is not fully understood. This study investigates the involvement of SR-B1 in cholesterol homeostasis of tumor cells and its implications for potential therapy. We found that SR-B1 depletion in melanoma cells does not alter total cholesterol levels, but induces cholesterol biosynthesis. This effect was characterized by an increased expression of HMG-CoA reductase (HMGCR), a rate limiting enzyme of cholesterol biosynthesis. Notably, further analyses indicated that this regulation occurs at the post-translational level, mediated via the hypoxia-inducible factor (HIF) signaling pathway. Importantly, we identified SR-B1 as a transporter of the lipid hormone sphingosine-1-phosphate (S1P) and we found that S1P exposure leads to HIF1A up-regulation. Finally, we used a pluripotent stem cell-derived skin organoid model to show that targeting SR-B1 in combination with targeted melanoma therapy can lead to increased apoptosis and suppressed proliferation of transplanted tumor cells. Our study shows that functional SR-B1 is linked to inflammatory signaling, which reduces cholesterol synthesis, while enabling melanoma cell survival during chemotherapy treatment.
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