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Role of Amino Acid Arginine and Nitric Oxide in Mechanisms of Cytoprotective Effect of Non-Opiate Leu-Enkephalin Analogue In Vitro
Incubation of primary culture of pulmonary fibroblasts with non-opiate analogue of leuenkephalin (NALE; Phe-D-Ala-Gly-Phe-Leu-Arg, 0.1 μM) reduced generation of superoxide anion-radical (by 20.7%) and decreased the number of p53(+) cells (by 40.2%) induced by exposure to H(2)O(2) (60 μM). The cytopr...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8636574/ https://www.ncbi.nlm.nih.gov/pubmed/34855076 http://dx.doi.org/10.1007/s10517-021-05374-2 |
Sumario: | Incubation of primary culture of pulmonary fibroblasts with non-opiate analogue of leuenkephalin (NALE; Phe-D-Ala-Gly-Phe-Leu-Arg, 0.1 μM) reduced generation of superoxide anion-radical (by 20.7%) and decreased the number of p53(+) cells (by 40.2%) induced by exposure to H(2)O(2) (60 μM). The cytoprotective effect of NALE was potentiated by NO synthase inhibitor L-NAME (1 mM): the number of p53(+) cells decreased by 65.3% and morphometric parameters of the cell nuclei and nucleoli were improved. Incubation of pulmonary fibroblasts culture with peptide G (Phe-D-Ala-Gly-Phe-Leu-Gly, 0.1 μM) also significantly reduced the damaging effect of H(2)O(2): the number of p53(+) cells decreased by 73.5%, the area of cell nuclei returned to normal, and generation of superoxide anion-radical decreased by 18.4%. These results indicate that C-terminal amino acid Arg and activation of NO synthase are not involved in the direct cytoprotective effect of NALE. |
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