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Tipo:	Artigo de Periódico
Título:	Maternal vitamin D deficiency affects the morphology and function of glycolytic muscle in adult offspring rats
Autor(es):	Natany Garcia Reis Neusa Maria Zanon Tatiana E. Koike Audrei R. Santos Elen H. Miyabara Isis do Carmo Kettelhut Luiz Carlos Navegantes Ana Paula Assis Natalia Lauterbach Dawit Albieiro Pinheiro Gonçalves Wilian de Assis Silveira Henrique J. N. Morgan Rafael Valentim Lucas F. Almeida Lilian do Carmo Heck
Resumo:	Background Fetal stage is a critical developmental window for the skeletal muscle, but little information is available about the impact of maternal vitamin D (Vit. D) deficiency (VDD) on offspring lean mass development in the adult life of male and female animals. Methods Female rats (Wistar Hannover) were fed either a control (1000 IU Vit. D3/kg) or a VDD diet (0 IU Vit. D3/kg) for 6 weeks and during gestation and lactation. At weaning, male and female offspring were randomly separated and received a standard diet up to 180 days old. Results Vitamin D deficiency induced muscle atrophy in the male (M-VDD) offspring at the end of weaning, an effect that was reverted along the time. Following 180 days, fast-twitch skeletal muscles [extensor digitorum longus (EDL)] from the M-VDD showed a decrease (20%; P < 0.05) in the number of total fibres but an increase in the cross-sectional area of IIB (17%; P < 0.05), IIA (19%; P < 0.05) and IIAX (21%; P < 0.05) fibres. The fibre hypertrophy was associated with the higher protein levels of MyoD (73%; P < 0.05) and myogenin (55% %; P < 0.05) and in the number of satellite cells (128.8 ± 14 vs. 91 ± 7.6 nuclei Pax7 + in the M-CTRL; P < 0.05). M-VDD increased time to fatigue during ex vivo contractions of EDL muscles and showed an increase in the phosphorylation levels of IGF-1/insulin receptor and their downstream targets related to anabolic processes and myogenic activation, including Ser 473Akt and Ser 21/9GSK-3β. In such muscles, maternal VDD induced a compensatory increase in the content of calcitriol (two-fold; P < 0.05) and CYP27B1 (58%; P < 0.05), a metabolizing enzyme that converts calcidiol to calcitriol. Interestingly, most morphological and biochemical changes found in EDL were not observed in slow-twitch skeletal muscles (soleus) from the M-VDD group as well as in both EDL and soleus muscles from the female offspring. Conclusions These data show that maternal VDD selectively affects the development of type-II muscle fibres in male offspring rats but not in female offspring rats and suggest that the enhancement of their size and fatigue resistance in fast-twitch skeletal muscle (EDL) is probably due to a compensatory increase in the muscle content of Vit. D in the adult age.
Assunto:	Vitamina D Feto Esqueleto Músculos Hipertrofia
Idioma:	eng
País:	Brasil
Editor:	Universidade Federal de Minas Gerais
Sigla da Instituição:	UFMG
Departamento:	EEF - DEPARTAMENTO DE EDUCAÇÃO FÍSICA EEFFTO - ESCOLA DE EDUCAÇÃO FISICA, FISIOTERAPIA E TERAPIA OCUPACIONAL
Tipo de Acesso:	Acesso Aberto
Identificador DOI:	https://doi.org/10.1002/jcsm.12986
URI:	http://hdl.handle.net/1843/64800
Data do documento:	18-Mai-2022
metadata.dc.url.externa:	https://onlinelibrary.wiley.com/doi/10.1002/jcsm.12986
metadata.dc.relation.ispartof:	Journal of Cachexia, Sarcopenia and Muscle
Aparece nas coleções:	Artigo de Periódico

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