Endoplasmic reticulum stress promotes the apoptosis of testicular germ cells in hyperlipidemic rats / 中华男科学杂志
National Journal of Andrology
;
(12): 402-407, 2015.
Article
in Chinese
| WPRIM
| ID: wpr-276085
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the role of endoplasmic reticulum stress in the apoptosis of testicular germ cells in hyperlipidemic rats.</p><p><b>METHODS</b>We randomly assigned 42 four-week-old male Wistar rats into a normal control group (n = 12) and a high-fat group (n = 30) to be fed on a normal diet and a high-fat diet, respectively, for 10 weeks. Then we measured the concentrations of triglyceride (TG) and total cholesterol (TC) in the serum using an automatic biochemistry analyzer, detected the apoptosis of testicular germ cells by TUNEL staining, and determined the protein and mRNA expressions of GRP78 and. caspase-12 in the testis tissue by immunohistochemistry and RT-PCR, respectively.</p><p><b>RESULTS</b>The concentrations of TG and TC were significantly increased in the animals of the high-fat group ([3.00 ± 0.92] and [3.04 ± 0.39] mmol/L) as compared with the control rats ([1.43 ± 0.41] and [1.55 ± 0.23] mmol/L) (P < 0.01), and so was the apoptosis index of the testicular germ cells ([37.17 ± 2.74]% vs [5.16 ± 0.81]%, P < 0.01). The high-fat group, in comparison with the control, also showed remarkably upregulated protein and mRNA expressions of GRP78 (0.32 ± 0.03 and 0.86 ± 0.05 vs 0.19 ± 0.01 and 0.37 ± 0.03, P < 0.01) and caspase-12 (0.34 ± 0.02 and 0.87 ± 0.01 vs 0.12 ± 0.01 and 0.34 ± 0.03, P < 0.01) in the testis tissue.</p><p><b>CONCLUSION</b>The apoptosis of testicular germ cells is increased in hyperlipidemic rats, which may be attributed to endoplasmic reticulum stress.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Physiology
/
Spermatozoa
/
Staining and Labeling
/
Testis
/
Triglycerides
/
Blood
/
Random Allocation
/
Transcriptional Activation
/
Up-Regulation
Limits:
Animals
Language:
Chinese
Journal:
National Journal of Andrology
Year:
2015
Type:
Article
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