Melanoma Growth and Progression After Ultraviolet A Irradiation: Impact of Lysosomal Exocytosis and Cathepsin ProteasesShow others and affiliations
2015 (English)In: Acta Dermato-Venereologica, ISSN 0001-5555, E-ISSN 1651-2057, Vol. 95, no 7, p. 792-797Article in journal (Refereed) Published
Abstract [en]
Ultraviolet (UV) irradiation is a risk factor for development of malignant melanoma. UVA-induced lysosomal exocytosis and subsequent cell growth enhancement was studied in malignant melanoma cell lines and human skin melanocytes. UVA irradiation caused plasma membrane damage that was rapidly repaired by calcium-dependent lysosomal exocytosis. Lysosomal content was released into the culture medium directly after irradiation and such conditioned media stimulated the growth of non-irradiated cell cultures. By comparing melanocytes and melanoma cells, it was found that only the melanoma cells spontaneously secreted cathepsins into the surrounding medium. Melanoma cells from a primary tumour showed pronounced invasion ability, which was prevented by addition of inhibitors of cathepsins B, D and L. Proliferation was reduced by cathepsin L inhibition in all melanoma cell lines, but did not affect melanocyte growth. In conclusion, UVA-induced release of cathepsins outside cells may be an important factor that promotes melanoma growth and progression.
Place, publisher, year, edition, pages
ACTA DERMATO-VENEREOLOGICA , 2015. Vol. 95, no 7, p. 792-797
Keywords [en]
lysosome; cathepsin; UVA; exocytosis; melanocyte; melanoma
National Category
Dermatology and Venereal Diseases
Identifiers
URN: urn:nbn:se:liu:diva-122545DOI: 10.2340/00015555-2064ISI: 000362925500005PubMedID: 25669167OAI: oai:DiVA.org:liu-122545DiVA, id: diva2:867840
Note
Funding Agencies|Swedish Research Council; Ostgotaregionens Cancer Foundation; Stiftelsen Olle Engkvist Byggmastare; Swedish Cancer Society; Welander-Finsen Foundation
2015-11-062015-11-062021-12-28