Effects of Extracellular Calcium and 1,25 dihydroxyvitamin D3 on Sebaceous Gland Cells In vitro and In vivo
| Autor: | Christos C. Zouboulis, R. Kubba, Mohamed Badawy Abdel-Naser, Menon Gk, Amir M. Hossini, Holger Seltmann |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Sebaceous gland medicine.medical_specialty India chemistry.chemical_element Apoptosis Caspase 3 Dermatology Calcium Cell Line Sebaceous Glands 030207 dermatology & venereal diseases 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Calcitriol Antigens CD Internal medicine Acne Vulgaris Autophagy medicine Extracellular Humans Cell Shape Calcium Chelating Agents Caspase 7 Calcium metabolism Dose-Response Relationship Drug business.industry Lipogenesis General Medicine Cadherins Enzyme Activation EGTA 030104 developmental biology Endocrinology medicine.anatomical_structure chemistry Case-Control Studies business |
| Zdroj: | Acta Dermato Venereologica. 97:313-320 |
| ISSN: | 0001-5555 |
| DOI: | 10.2340/00015555-2525 |
| Popis: | Calcium and 1,25 dihydroxyvitamin D3 (1,25(OH)2D3) are promoters of epithelial cell functions; however their effects on sebaceous glands are unknown. In this study, morphology, ultrastructure, cell numbers, lipid synthesis and apoptosis of SZ95 sebocytes were assessed in vitro under different concentrations of extracellular calcium with or without 1,25(OH)2D3. Moreover, serum calcium and 1,25(OH)2D3 levels were assessed in acne and non-acne patients (controls). Under conditions of low extracellular calcium, lipogenesis and cell detachment were observed. Increasing extracellular calcium enhanced sebocyte numbers, induced epithelial morphology and reduced lipogenesis. Moreover, a reduction in extracellular calcium reduced E-cadherin and enhanced caspase 3/7 activity (apoptosis), whereas calcium chelation by EGTA (ethylene glycol-bis(β-aminoethyl ether)-N,N,N',N'-tetraacetic acid) resulted in enhanced lipogenesis. 1,25(OH)2D3 decreased sebaceous lipogenesis, but also induced signs of autophagy. In the clinical study, patients and controls exhibited normal serum calcium levels. Younger acne patients presented lower 1,25(OH)2D3 levels than did older ones. In conclusion, extracellular calcium and 1,25(OH)2D3 regulate sebocyte morphology, increase cell numbers, decrease sebaceous lipogenesis and induce cell autophagy in vitro. The increased ionized calcium and the reduced 1,25(OH)2D3 levels detected in the serum of younger patients with acne may contribute respectively to increased sebaceous gland volume and enhanced lipogenesis. |
| Databáze: | OpenAIRE |
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