Oxtr/TRPV1 expression and acclimation of skeletal muscle to cold-stress in male mice

in Journal of Endocrinology
Authors:
Elena Conte Department of Pharmacy–Pharmaceutical Sciences, University of Bari Aldo Moro, Bari, Italy

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Adele Romano Department of Physiology and Pharmacology ‘V. Erspamer’, SAPIENZA University, Rome, Italy

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Michela De Bellis Department of Pharmacy–Pharmaceutical Sciences, University of Bari Aldo Moro, Bari, Italy

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Marialuisa de Ceglia Department of Physiology and Pharmacology ‘V. Erspamer’, SAPIENZA University, Rome, Italy

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Maria Rosaria Carratù Department of Biomedical Sciences and Human Oncology (Section of Pharmacology), School of Medicine, University of Bari, Bari, Italy

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Silvana Gaetani Department of Physiology and Pharmacology ‘V. Erspamer’, SAPIENZA University, Rome, Italy

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Fatima Maqoud Department of Pharmacy–Pharmaceutical Sciences, University of Bari Aldo Moro, Bari, Italy

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Domenico Tricarico Department of Pharmacy–Pharmaceutical Sciences, University of Bari Aldo Moro, Bari, Italy

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https://orcid.org/0000-0003-2726-0462
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Claudia Camerino Department of Pharmacy–Pharmaceutical Sciences, University of Bari Aldo Moro, Bari, Italy
Department of Physiology and Pharmacology ‘V. Erspamer’, SAPIENZA University, Rome, Italy
Department of Biomedical Sciences and Human Oncology (Section of Pharmacology), School of Medicine, University of Bari, Bari, Italy

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Correspondence should be addressed to C Camerino: ccamerino@libero.it
DOI:
https://doi.org/10.1530/JOE-20-0346
Volume/Issue:
Volume 249: Issue 2
Article Type:
Research Article
Page Range:
135–148
Online Publication Date:
May 2021
Copyright:
© 2021 Society for Endocrinology 2021
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We explored the involvement of oxytocin receptor (Oxtr)/transient-receptor-potential-vanilloid-1 (TRPV1) genes and oxytocin (Oxt) on the adaptation of skeletal muscle to cold stress challenge in mice. Oxtr expression in hypothalamic paraventricular (PVN), supraoptic nuclei (SON), and hippocampus (HIPP) were evaluated by immunohistochemistry in parallel with the measurement of circulating Oxt. The Oxtr and TRPV1 gene expressions in soleus (SOL) and tibialis anterior (TA) muscles were investigated by RT-PCR. Histological studies of the cardiac muscle after cold stress were also performed. Male mice (n = 15) were divided into controls maintained at room temperature (RT = 24°C), exposed to cold stress (CS) at T = 4°C for 6 h , and 5 days. Immunohistochemical studies showed that Oxtr protein expression increased by two-fold (P = 0.01) in PVN and by 1.5-fold (P = 0.0001) in HIPP after 6 h- and 5 days of CS but decreased by 2-fold (P = 0.026) in SON in 5 days. Both Oxtr and TRPV1 gene expression increased after 6 h and 5 days of CS in SOL and TA muscles. Oxtr vs TRPV1 gene expression in SOL and TA muscles evaluated by regression analysis was linearly correlated following CS at 6 h and 5 days but not at control temperature of 24 ± 1°C, supporting the hypothesis of coupling between these genes. The circulating levels of Oxt are unaffected after 6 h of CS but decreased by 0.2-fold (P = 0.0141) after 5 days-CS. This is the first report that Oxtr and TRPV1 expressions are upregulated in response to cold acclimation in skeletal muscle. The up-regulation of Oxtr in PVN and HIPP balances the decrease of circulating Oxt.

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Print ISSN:
0022-0795
Online ISSN:
1479-6805
Copyright:
© 2021 Society for Endocrinology 2021
Page(s):
14
Article Type:
Research Article
Received Date:
06 Feb 2021
Accepted Date:
09 Mar 2021
Print Publication Date:
01 May 2021
Online Publication Date:
May 2021
Keywords:
oxytocin; TRPV1; cold stress; skeletal muscles; brain

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