Inhibition of Expression of the Circadian Clock Gene ICryptochrome 1/I Causes Abnormal Glucometabolic and Cell Growth in IBombyx mori/I Cells

Cryptochrome is the earliest discovered photoreceptor protein in organisms. However, the effect of CRY (BmCRY), the clock protein in Bombyx mori, on the body or cell metabolism remains unclear. In this study, we continuously interfered with the expression of the BmCry1 gene (Cry1-KD) in the silkworm...

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Bibliographic Details
Published in:International journal of molecular sciences 2023-03, Vol.24 (6)
Main Authors: Qiu, Jianfeng, Dai, Taiming, Tao, Hui, Li, Xue, Luo, Cheng, Sima, Yanghu, Xu, Shiqing
Format: Article
Language:English
Subjects:
Amino acids
Analysis
Dextrose
Genes
Genetic research
Glucose
Growth
Mass spectrometry
Metabolites
Nucleotides
Physiological aspects
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Summary:Cryptochrome is the earliest discovered photoreceptor protein in organisms. However, the effect of CRY (BmCRY), the clock protein in Bombyx mori, on the body or cell metabolism remains unclear. In this study, we continuously interfered with the expression of the BmCry1 gene (Cry1-KD) in the silkworm ovary cell line (BmN), and the BmN cells developed abnormally, with accelerated cell growth and a smaller nucleus. Metabolomics was used to identify the cause of the abnormal development of Cry1-KD cells based on gas chromatography/liquid chromatography-mass spectrometry. A total of 56 differential metabolites including sugars, acids, amino acids, and nucleotides were identified in wild-type and Cry1-KD cells. KEGG enrichment analysis showed that BmCry1 knockdown resulted in significantly upregulated glycometabolism in BmN cells, indicated by glucose-6-phosphate, fructose-6-phosphate, and pyruvic acid levels. The activities of key enzymes BmHK, BmPFK, and BmPK as well as their mRNA levels further confirmed that the glycometabolism level of Cry1-KD cells was significantly increased. Our results show that a possible mechanism of BmCry1 knockdown leading to abnormal cell development is the elevated level of glucose metabolism in cells.
ISSN:1422-0067
DOI:10.3390/ijms24065435