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Zepeda,Andrea B.; Figueroa,Carolina A.; Abdalla,Dulcineia S.P.; Maranhão,Andrea Q.; Ulloa,Patricio H.; Pessoa Jr,Adalberto; Farías,Jorge G.. |
Pichia pastoris is methylotrophic yeast used as an efficient expression system for heterologous protein production. In order to evaluate the effects of temperature (10 and 30 °C) and methanol (1 and 3% (v/v)) on genetically-modified Pichia pastoris, different biomarkers were evaluated: Heat stress (HSF-1 and Hsp70), oxidative stress (OGG1 and TBARS) and antioxidant (GLR). Three yeast cultures were performed: 3X = 3% methanol-10 °C, 4X = 3% methanol-30 °C, and 5X = 1% methanol-10°C. The expression level of HIF-1α, HSF-1, HSP-70 and HSP-90 biomarkers were measured by Western blot and in situ detection was performed by immunocytochemistry. Ours results show that at 3% methanol -30 °C there is an increase of mitochondrial OGG1 (mtOGG1), Glutathione Reductase... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxidative stress; Recombinant yeast; Heat stress protein; DNA damage. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200014 |
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Zepeda,Andrea B.; Figueroa,Carolina A.; Abdalla,Dulcineia S.P.; Maranhão,Andrea Q.; Ulloa,Patricio H.; Pessoa Jr.,Adalberto; Farías,Jorge G.. |
Pichia pastoris is a methylotrophic yeast used as an efficient expression system for heterologous protein production as compared to other expression systems. Considering that every cell must respond to environmental changes to survive and differentiate, determination of endogenous protein related to heat stress responses and hypoxia, it would necessary to establish the temperature and methanol concentration conditions for optimal growth. The aim of this study is characterize the culture conditions through the putative biomarkers in different conditions of temperature and methanol concentration. Three yeast cultures were performed: 3X = 3% methanol -10 °C, 4X = 3% methanol -30 °C, and 5X = 1% methanol -10 °C. The expression level of HIF-1α, HSF-1, HSP-70... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recombinant yeast; Heat stress protein; Hypoxia; Chaperone. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200015 |
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Weinacker,Daniel; Rabert,Claudia; Zepeda,Andrea B.; Figueroa,Carolina A.; Pessoa,Adalberto; Farías,Jorge G.. |
Since the 1970s, the establishment and development of the biotech industry has improved exponentially, allowing the commercial production of biopharmaceutical proteins. Nowadays, new recombinant protein production is considered a multibillion-dollar market, in which about 25% of commercial pharmaceuticals are biopharmaceuticals. But to achieve a competitive production process is not an easy task. Any production process has to be highly productive, efficient and economic. Despite that the perfect host is still not discovered, several research groups have chosen Pichia pastoris as expression system for the production of their protein because of its many features. The attempt of this review is to embrace several research lines that have adopted Pichia... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Heterologous expression system; Recombinant protein; Production; Scale up. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400004 |
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