1. Title efficacy of phosphodiesterase 5 inhibitor on distant burn-induced muscle autophagy, microcirculation, and survival rate
- Author
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Yoshihiro Maeyama, Sachiko Hosokawa, Masao Kaneki, Hiroaki Koseki, Shingo Yasuhara, Ronald G. Tompkins, Hannah Greenfeld, Kentaro Yomogida, Michio Nagashima, Madeleine Rutledge, J. A. Jeevendra Martyn, and Chelsea Mehr
- Subjects
Male ,medicine.medical_specialty ,Burn injury ,Survival ,medicine.drug_mechanism_of_action ,Physiology ,Endocrinology, Diabetes and Metabolism ,Blotting, Western ,Tadalafil ,Microcirculation ,Mice ,Genes, Reporter ,Physiology (medical) ,Internal medicine ,Autophagy ,Animals ,Medicine ,Muscular dystrophy ,Muscle, Skeletal ,Wasting ,Wound Healing ,Microscopy, Confocal ,business.industry ,Skeletal muscle ,DNA ,Phosphodiesterase 5 Inhibitors ,medicine.disease ,Immunohistochemistry ,Muscle atrophy ,Mice, Inbred C57BL ,medicine.anatomical_structure ,Endocrinology ,Regional Blood Flow ,medicine.symptom ,Burns ,business ,Phosphodiesterase 5 inhibitor ,Carbolines - Abstract
Skeletal muscle wasting is an exacerbating factor in the prognosis of critically ill patients. Using a systemic burn injury model in mice, we have established a role of autophagy in the resulting muscle wasting that is distant from the burn trauma. We provide evidence that burn injury increases the autophagy turnover in the distal skeletal muscle by conventional postmortem tissue analyses and by a novel in vivo microscopic method using an autophagy reporter gene (tandem fluorescent LC3). The effect of tadalafil, a phosphodiesterase 5 inhibitor (PDE5I), on burn-induced skeletal muscle autophagy is documented and extends our published results that PDE5Is attenuates muscle degeneration in a muscular dystrophy model. We also designed a translational experiment to examine the impact of PDE5I on whole body and demonstrated that PDE5I administration lessened muscle atrophy, mitigated microcirculatory disturbance, and improved the survival rate after burn injury.
- Published
- 2013
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