Abstract:
:Carotenoids produced by microbial sources are of industrial and medicinal importance due to their antioxidant and anticancer properties. In the current study, optimization of β-carotene production in M. circinelloides strain 277.49 was achieved using response surface methodology (RSM). Cerulenin and ketoconazole were used to inhibit fatty acids and the sterol biosynthesis pathway, respectively, in order to enhance β-carotene production by diverting metabolic pool towards the mevalonate pathway. All three variables used in screening experiments were found to be significant for the production of β-carotene. The synergistic effect of the C/N ratio, cerulenin, and ketoconazole was further evaluated and optimized for superior β-carotene production using central composite design of RSM. Our results found that the synergistic combination of C/N ratios, cerulenin, and ketoconazole at different concentrations affected the β-carotene productions significantly. The optimal production medium (std. order 11) composed of C/N 25, 10 μg/mL cerulenin, and 150 mg/L ketoconazole, producing maximum β-carotene of 4.26 mg/L (0.43 mg/g) which was 157% greater in comparison to unoptimized medium (1.68 mg/L, 0.17 mg/g). So, it was concluded that metabolic flux had been successfully redirected towards the mevalonate pathway for enhanced β-carotene production in CBS 277.49.
journal_name
Biomed Res Intjournal_title
BioMed research internationalauthors
Naz T,Nazir Y,Nosheen S,Ullah S,Halim H,Fazili ABA,Li S,Mustafa K,Mohamed H,Yang W,Song Ydoi
10.1155/2020/8890269subject
Has Abstractpub_date
2020-12-29 00:00:00pages
8890269eissn
2314-6133issn
2314-6141journal_volume
2020pub_type
杂志文章abstract:Purpose:To explore the effects of depression on cardiac autonomic nerve function and related metabolic pathways, the heart rate variability (HRV) and urinary differential metabolites were detected on the college students with depression. Methods:12 female freshmen with depression were filtered by the Beck Depression I...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/5246350
更新日期:2020-02-27 00:00:00
abstract::Triple-negative breast cancer (TNBC) is a very aggressive malignant type of tumor that currently lacks effective targeted therapies. In hematological malignancies, chimeric antigen receptor T (CAR-T) cells have shown very significant antitumor ability; however, in solid tumors, the efficacy is poor. In order to apply ...
journal_title:BioMed research international
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pub_type: 临床试验,杂志文章
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pub_type: 临床试验,杂志文章,多中心研究
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2018-07-09 00:00:00