Lithium Enhances Autophagy and Cell Death in Skin Melanoma: An Ultrastructural and Immunohistochemical Study.

Publication date: May 20, 2022

Lithium is an inhibitor of glycogen synthase kinase 3 beta, which is traditionally used in the treatment of bipolar disorders and has antitumor effects. The aim of the current study was to determine if lithium salt causes autophagy and apoptosis in skin melanoma cells to enhance cell death. Light microscopy, transmission electron microscopy, immunohistochemistry, and immunofluorescence were used to study the mechanism of action of lithium carbonate in B16 melanoma cells in vivo. Proliferating cell nuclear antigen immunofluorescence assay revealed that the proliferation of B16 melanoma cells was suppressed by lithium treatment for 7 days. Electron microscopy demonstrated a significant increase in the number of autophagic vacuoles in lithium-treated cells relative to control. In addition, levels of autophagy markers LC3 beta and LAMP1 found in lithium-treated tumor xenografts were higher than levels of these markers in the control tumors. Lithium induced caspase-3 expression and apoptotic cell death in tumor cells. Thus, lithium carbonate is the compound that inhibits cell proliferation and stimulates cell death in melanoma cells through induction of autophagy and apoptosis. Stimulation of autophagy by lithium could contribute to the development of autophagic cell death in tumor cells.

Concepts Keywords
Apoptosis Branches of biology
Immunofluorescence Life sciences
Lithium Immunology
Nuclear Programmed cell death
Vivo Cellular processes
Autophagy
Cellular senescence
MTOR
B16 Melanoma
Lithium
Apoptosis

Semantics

Type Source Name
disease MESH development
disease MESH tumor
disease MESH B16 melanoma
drug DRUGBANK Lithium carbonate
pathway KEGG Apoptosis
disease MESH bipolar disorders
pathway KEGG Melanoma
disease MESH Melanoma
pathway KEGG Autophagy

Original Article

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