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Glucose–methanol‐based fed‐batch fermentation for the production of recombinant human interferon gamma (rhIFN‐γ) and evaluation of its antitumor potential
Author(s) -
Prabhu Ashish A,
Kumar Jadi Praveen,
Mandal Biman B.,
Veeranki Venkata Dasu
Publication year - 2020
Publication title -
biotechnology and applied biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.468
H-Index - 70
eISSN - 1470-8744
pISSN - 0885-4513
DOI - 10.1002/bab.1868
Subject(s) - recombinant dna , pichia pastoris , cell culture , fermentation , interferon gamma , intracellular , cell growth , chemistry , biology , biochemistry , cancer research , in vitro , gene , genetics
Squamous cell carcinoma (SCC) is nonmelanoma skin cancer, which is very common in patients having T‐cell immunosuppressant drugs. Anticancerous agents such as cytokines showed effective response on SCC. Human interferon‐gamma (hIFN‐γ), a type II cytokines, are having potent antiproliferative and immunomodulatory effects. In the current study, the fed‐batch cultivation of recombinant Pichia pastoris was carried out, and its effect on cell biomass production, recombinant human interferon‐gamma (rhIFN‐γ) production, and the overflow metabolites was estimated. P. pastoris GS115 strain coexpressed with 6‐phosphogluconolactonase (SOL3) and ribulose‐phosphate 3‐epimerase (RPE1) gene (GS115/rhIFN‐γ/SR) resulted in 60 mg L −1 of rhIFN‐γ production, which was twofold higher as compared with the production from GS115/rhIFN‐γ strain. The antiproliferative potential of rhIFN‐γ was examined on the human squamous carcinoma (A431) cell lines. Cells treated with 80 ng mL −1 of rhIFN‐γ exhibited 50% growth inhibition by enhancing the production of intracellular reactive oxygen species levels and disrupting membrane integrity. Our findings highlight a state of art process development strategy for the high‐level production of rhIFN‐γ and its potential application as a therapeutic drug in SCC therapy.