Abstract：
:Post-translational glycosylation of proteins with O-linked β-N-acetylglucosamine (O-GlcNAcylation) and changes of galectin expression profiles are essential in many cellular stress responses. We examine this regulation in the liver tissue of hibernating thirteen-lined ground squirrels (Ictidomys tridecemlineatus) representing a biological model of hypometabolism and physiological stress resistance. The tissue levels of O-GlcNAcylated proteins as well as galectin-1 and galectin-3 proteins detected by immunodot blot assay were significantly lower by 4.6-5.4-, 2.2-2.3- and 2.5-2.9-fold, respectively, in the non-hibernating summer squirrels compared with those in winter, whether hibernating or aroused. However, there were no differences in the expression of genes encoding enzymes involved in O-GlcNAc cycle (O-GlcNAc transferase and O-GlcNAcase) and such galectins as LGALS1, LGALS2, LGALS3, LGALS4 and LGALS9. Only the expression of LGALS8 gene in the liver tissue was significantly decreased by 37.6 ± 0.1% in hibernating ground squirrels relative to summer animals. Considering that the expression of a proven genetic biomarker ELOVL6 encoding ELOVL fatty acid elongase 6 was readily upregulated in non-hibernating animals by 11.3-32.9-fold, marginal differential changes in the expression of galectin genes cannot be classified as biomarkers of hibernation. Thus, this study provides evidence that hibernation in Ictidomys tridecemlineatus is associated with increasing O-GlcNAcylation of liver proteins and suggests that the contribution of galectins deserves further studies at the protein level.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Jariwala KA,Sherazi AA,Tazhitdinova R,Shum K,Guevorguian P,Karagiannis J,Staples JF,Timoshenko AVdoi
10.1007/s00441-020-03185-xsubject
Has Abstractpub_date
2020-07-01 00:00:00pages
115-123issue
1eissn
0302-766Xissn
1432-0878pii
10.1007/s00441-020-03185-xjournal_volume
381pub_type
杂志文章abstract：:The immunological identity of a uteroglobin-like protein, occurring in respiratory tract secretions and tissue, with uteroglobin from rabbit endometrial secretion is demonstrated. A uteroglobin-like antigen has been localized in bronchial epithelial cells and in bronchioles by immunofluorescence. This secretory protei...
journal_title：Cell and tissue research
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journal_title：Cell and tissue research
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