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Quantification of Myosin Heavy Chain Isoform mRNA Transcripts in the Supraspinatus Muscle of Vertical Clinger Primates

In: Folia Primatologica
Authors:
Josep Maria Potau null

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Rosa Artells null

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Carmen Muñoz null

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Júlia Arias-Martorell null
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Juan Francisco Pastor null

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Félix Jesús de Paz null

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Mercedes Barbosa null

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Gaëlle Bello-Hellegouarch null
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Alejandro Pérez-Pérez null

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Online Publication Date:
14 Feb 2018
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Vertical clinging is a specialized form of locomotion characteristic of the primate family Callitrichidae. Vertical clinging requires these pronograde primates to maintain a vertical posture, so the protraction of their forelimbs must resist gravity. Since pronograde primates usually move as horizontal quadrupeds, we hypothesized that the supraspinatus muscle of vertical clingers would present specific characteristics related to the functional requirements imposed on the shoulder area by vertical clinging. To test this hypothesis, we quantified by real-time quantitative polymerase chain reaction the mRNA transcripts of myosin heavy chain (MHC) isoforms in the supraspinatus muscle of 15 species of pronograde primates, including vertical clingers. Our results indicate that the supraspinatus of vertical clingers has a specific expression pattern of the MHC isoforms, with a low expression of the transcripts of the slow MHC-I isoform and a high expression of the transcripts of the fast MHC-II isoforms. We conclude that these differences can be related to the particular functional characteristics of the shoulder in vertical clingers, but also to other anatomical adaptations of these primates, such as their small body size.

Title:
Quantification of Myosin Heavy Chain Isoform mRNA Transcripts in the Supraspinatus Muscle of Vertical Clinger Primates
Article Type:
Research Article
DOI:
https://doi.org/10.1159/000485246
Language:
English
Pages:
497–506
Keywords:
Myosin heavy chain; Supraspinatus; Vertical clinging
In:
Folia Primatologica
In:
Volume 88: Issue 6
Publisher:
BRILL
E-ISSN:
1421-9980
Print ISSN:
0015-5713

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