Articles by Vanessa Ueberschlag-Pitiot in JoVE
Improved Protocol for Chromatin Immunoprecipitation from Mouse Skeletal Muscle Shilpy Joshi1, Vanessa Ueberschlag-Pitiot1, Daniel Metzger1, Irwin Davidson1 1Department of Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire A novel protocol for the preparation of chromatin from adult mouse skeletal muscle adapted to the study of gene regulation in muscle fibers by chromatin immunoprecipitation is presented.
Other articles by Vanessa Ueberschlag-Pitiot on PubMed
Effect of Constitutive Inactivation of the Myostatin Gene on the Gain in Muscle Strength During Postnatal Growth in Two Murine Models Muscle & Nerve. | Pubmed ID: 27312354 The effect of constitutive inactivation of the gene encoding myostatin on the gain in muscle performance during postnatal growth has not been well characterized.
Gonad-related Factors Promote Muscle Performance Gain During Postnatal Development in Male and Female Mice American Journal of Physiology. Endocrinology and Metabolism. | Pubmed ID: 28351832 To better define the role of male and female gonad-related factors (MGRF, presumably testosterone, and FGRF, presumably estradiol, respectively) on mouse hindlimb skeletal muscle contractile performance/function gain during postnatal development, we analyzed the effect of castration initiated before puberty in male and female mice. We found that muscle absolute and specific (normalized to muscle weight) maximal forces were decreased in 6-mo-old male and female castrated mice compared with age- and sex-matched intact mice, without alteration in neuromuscular transmission. Moreover, castration decreased absolute and specific maximal powers, another important aspect of muscle performance, in 6-mo-old males, but not in females. Absolute maximal force was similarly reduced by castration in 3-mo-old muscle fiber androgen receptor (AR)-deficient and wild-type male mice, indicating that the effect of MGRF was muscle fiber AR independent. Castration reduced the muscle weight gain in 3-mo mice of both sexes and in 6-mo females but not in males. We also found that bone morphogenetic protein signaling through Smad1/5/9 was not altered by castration in atrophic muscle of 3-mo-old mice of both sexes. Moreover, castration decreased the sexual dimorphism regarding muscle performance. Together, these results demonstrated that in the long term, MGRF and FGRF promote muscle performance gain in mice during postnatal development, independently of muscle growth in males, largely via improving muscle contractile quality (force and power normalized), and that MGFR and FGRF also contribute to sexual dimorphism. However, the mechanisms underlying MGFR and FGRF actions remain to be determined.