Tags

Type your tag names separated by a space and hit enter

Thyroid hormone is required for the phenotype transitions induced by the pharmacological inhibition of calcineurin in adult soleus muscle of rats.
Am J Physiol Endocrinol Metab. 2008 Jan; 294(1):E69-77.AJ

Abstract

The present experiment was designed to examine the effects of hypothyroidism and calcineurin inhibition induced by cyclosporin A (CsA) administration on both contractile and metabolic soleus muscle phenotypes, with a novel approach to the signaling pathway controlling mitochondrial biogenesis. Twenty-eight rats were randomly assigned to four groups, normothyroid, hypothyroid, and orally treated with either CsA (25 mg/kg, N-CsA and H-CsA) or vehicle (N-Vh and H-Vh), for 3 wk. Muscle phenotype was estimated by the MHC profile and activities of oxidative and glycolytic enzymes. We measured mRNA levels of the peroxisome proliferator-activated receptor-gamma coactivator-1 alpha (PGC-1 alpha), the major regulator of mitochondrial content. We also studied the expression of the catalytic A-subunit of calcineurin (CnA) both at protein and transcript levels and mRNA levels of modulatory calcineurin inhibitor proteins (MCIP)-1 and -2, which are differentially regulated by calcineurin activity and thyroid hormone, respectively. CsA-administration induced a slow-to-fast MHC transition limited to the type IIA isoform, which is associated with increased oxidative capacities. Hypothyroidism strongly decreased both the expression of fast MHC isoforms and oxidative capacities. Effects of CsA administration on muscle phenotype were blocked in conditions of thyroid hormone deficiency. Changes in the oxidative profile were strongly related to PGC-1 alpha changes and associated with phosphorylation of p38 MAPK. Calcineurin and MCIPs mRNA levels were decreased by both hypothyroidism and CsA without additive effects. Taken together, these results suggest that adult muscle phenotype is primarily under the control of thyroid state. Physiological levels of thyroid hormone are required for the effects of calcineurin inhibition on slow oxidative muscle phenotype.

Authors+Show Affiliations

Département des facteurs humains, Centre de recherches du service de santé des armées, BP 87-38702 La Tronche Cedex, France. nkoulmann@crssa.netNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17971515

Citation

Koulmann, Nathalie, et al. "Thyroid Hormone Is Required for the Phenotype Transitions Induced By the Pharmacological Inhibition of Calcineurin in Adult Soleus Muscle of Rats." American Journal of Physiology. Endocrinology and Metabolism, vol. 294, no. 1, 2008, pp. E69-77.
Koulmann N, Bahi L, Ribera F, et al. Thyroid hormone is required for the phenotype transitions induced by the pharmacological inhibition of calcineurin in adult soleus muscle of rats. Am J Physiol Endocrinol Metab. 2008;294(1):E69-77.
Koulmann, N., Bahi, L., Ribera, F., Sanchez, H., Serrurier, B., Chapot, R., Peinnequin, A., Ventura-Clapier, R., & Bigard, X. (2008). Thyroid hormone is required for the phenotype transitions induced by the pharmacological inhibition of calcineurin in adult soleus muscle of rats. American Journal of Physiology. Endocrinology and Metabolism, 294(1), E69-77.
Koulmann N, et al. Thyroid Hormone Is Required for the Phenotype Transitions Induced By the Pharmacological Inhibition of Calcineurin in Adult Soleus Muscle of Rats. Am J Physiol Endocrinol Metab. 2008;294(1):E69-77. PubMed PMID: 17971515.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Thyroid hormone is required for the phenotype transitions induced by the pharmacological inhibition of calcineurin in adult soleus muscle of rats. AU - Koulmann,Nathalie, AU - Bahi,Lahoucine, AU - Ribera,Florence, AU - Sanchez,Hervé, AU - Serrurier,Bernard, AU - Chapot,Rachel, AU - Peinnequin,André, AU - Ventura-Clapier,Renée, AU - Bigard,Xavier, Y1 - 2007/10/30/ PY - 2007/11/1/pubmed PY - 2008/3/14/medline PY - 2007/11/1/entrez SP - E69 EP - 77 JF - American journal of physiology. Endocrinology and metabolism JO - Am J Physiol Endocrinol Metab VL - 294 IS - 1 N2 - The present experiment was designed to examine the effects of hypothyroidism and calcineurin inhibition induced by cyclosporin A (CsA) administration on both contractile and metabolic soleus muscle phenotypes, with a novel approach to the signaling pathway controlling mitochondrial biogenesis. Twenty-eight rats were randomly assigned to four groups, normothyroid, hypothyroid, and orally treated with either CsA (25 mg/kg, N-CsA and H-CsA) or vehicle (N-Vh and H-Vh), for 3 wk. Muscle phenotype was estimated by the MHC profile and activities of oxidative and glycolytic enzymes. We measured mRNA levels of the peroxisome proliferator-activated receptor-gamma coactivator-1 alpha (PGC-1 alpha), the major regulator of mitochondrial content. We also studied the expression of the catalytic A-subunit of calcineurin (CnA) both at protein and transcript levels and mRNA levels of modulatory calcineurin inhibitor proteins (MCIP)-1 and -2, which are differentially regulated by calcineurin activity and thyroid hormone, respectively. CsA-administration induced a slow-to-fast MHC transition limited to the type IIA isoform, which is associated with increased oxidative capacities. Hypothyroidism strongly decreased both the expression of fast MHC isoforms and oxidative capacities. Effects of CsA administration on muscle phenotype were blocked in conditions of thyroid hormone deficiency. Changes in the oxidative profile were strongly related to PGC-1 alpha changes and associated with phosphorylation of p38 MAPK. Calcineurin and MCIPs mRNA levels were decreased by both hypothyroidism and CsA without additive effects. Taken together, these results suggest that adult muscle phenotype is primarily under the control of thyroid state. Physiological levels of thyroid hormone are required for the effects of calcineurin inhibition on slow oxidative muscle phenotype. SN - 0193-1849 UR - https://www.unboundmedicine.com/medline/citation/17971515/Thyroid_hormone_is_required_for_the_phenotype_transitions_induced_by_the_pharmacological_inhibition_of_calcineurin_in_adult_soleus_muscle_of_rats_ L2 - https://journals.physiology.org/doi/10.1152/ajpendo.00173.2007?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -