The heterogeneity of store-operated calcium entry in melanoma

Area of Science:

• Oncology
• Cell Biology
• Biochemistry

Background:

• Calcium ions (Ca2+) are crucial regulators of cellular processes, including migration, proliferation, and apoptosis, which are often dysregulated in cancer.
• Store-operated calcium entry (SOCE) is the primary mechanism for Ca2+ influx in non-excitable cells, mediated by STIM and Orai proteins.
• Alterations in STIM and Orai expression and function are observed across various cancer types, suggesting their involvement in tumorigenesis and disease progression.

Purpose of the Study:

• To review the role of STIM, Orai, and the SOCE pathway in melanoma progression.
• To explore how melanoma's inherent heterogeneity might contribute to conflicting findings regarding SOCE's role in the disease.

Main Methods:

• Literature review and synthesis of existing research on SOCE, STIM, Orai, and melanoma.
• Analysis of studies investigating the expression and function of STIM and Orai in melanoma.
• Discussion of the impact of cellular heterogeneity on SOCE-mediated processes in melanoma.

Main Results:

• STIM and Orai proteins are involved in key cellular functions perturbed in cancer, including migration and proliferation.
• Changes in STIM and Orai expression and function are linked to the progression of various cancers, including melanoma.
• Melanoma's heterogeneity presents a challenge in understanding the consistent role of SOCE in disease progression, leading to a lack of consensus in current research.

Conclusions:

• The STIM/Orai-mediated SOCE pathway plays a significant role in physiological processes critical to cancer progression.
• Understanding the complex interplay between SOCE and melanoma heterogeneity is essential for clarifying its precise role in disease advancement.
• Further research is needed to reconcile the divergent findings on SOCE in melanoma and to potentially identify therapeutic targets.