M
Mark D. Johnson
Researcher at University of Massachusetts Medical School
Publications - 301
Citations - 18425
Mark D. Johnson is an academic researcher from University of Massachusetts Medical School. The author has contributed to research in topics: Medicine & Gene. The author has an hindex of 60, co-authored 289 publications receiving 16103 citations. Previous affiliations of Mark D. Johnson include National Institutes of Health & Georgetown University Medical Center.
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Journal ArticleDOI
Structural and vibrational study of the negative thermal expansion in liquid As2Te3
Céline Otjacques,Jean-Yves Raty,Françoise Hippert,Helmut Schober,Mark D. Johnson,René Céolin,Jean-Pierre Gaspard +6 more
TL;DR: In this article, the authors present an experimental and theoretical study of liquid atoms in a negative thermal expansion (NTE) in a 250 K range above the melting temperature of the liquid, showing an increase in the coordination numbers and a symmetrization of the first neighbors shell around atoms.
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Bax regulates c-Myc-induced mammary tumour apoptosis but not proliferation in MMTV-c-myc transgenic mice
TL;DR: It is suggested that in contrast to c-Myc-induced lymphomagenesis, mammary tumorigenesis induced by deregulated c-myc expression requires some amount of Bax expression.
Journal ArticleDOI
G proteins in cardiovascular function and dysfunction.
Mark D. Johnson,Eitan Friedman +1 more
Journal Article
Heterologous desensitization of the rat tail artery contraction and inositol phosphate accumulation after in vitro exposure to phenylephrine is mediated by decreased levels of Galphaq and Galphai.
TL;DR: Data show that the reduced transmembrane signaling for the alpha1AR in tail artery after in vitro PE exposure is associated with decreases in Galphaq and Galphai protein levels, which appears to mediate the loss of function of alpha2AR and perhaps of other G protein-coupled receptors.
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Investigation of interfraction variations of MammoSite balloon applicator in high-dose-rate brachytherapy of partial breast irradiation.
Yongbok Kim,Yongbok Kim,Mark D. Johnson,Mark D. Johnson,Mark Trombetta,Mark Trombetta,David S. Parda,David S. Parda,Moyed Miften,Moyed Miften +9 more
TL;DR: The interfraction variations were patient specific and fraction dependent and although the average interfraction dose variations for the target and organs at risk were not clinically significant, the maximum variations could be clinically significant.