Review Mechanisms of Skeletal Muscle Degradation and Its Therapy in Cancer Cachexia
Histol Histopathol (2007) 22: 805-814 Histology and http://www.hh.um.es Histopathology Cellular and Molecular Biology Review Mechanisms of skeletal muscle degradation and its therapy in cancer cachexia L.G. Melstrom1, K.A. Melstrom Jr.2, X.-Z. Ding1 and T.E. Adrian1,3 1Department of Surgery and Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois, 2Department of Surgery, Loyola University Medical Center, Maywood, Illinois and 3Department of Physiology, United Arab Emirates University, Faculty of Medicine and Health Sciences, Al Ain, UAE Summary. Severe or chronic disease can lead to Introduction cachexia which involves weight loss and muscle wasting. Cancer cachexia contributes significantly to Cachexia can be described as weight loss, muscle disease morbidity and mortality. Multiple studies have wasting, loss of appetite and general debility occurring shown that the metabolic changes that occur with cancer with a chronic disease. This condition can be seen in cachexia are unique compared to that of starvation. patients with acquired immune deficiency syndrome, Specifically, cancer patients seem to lose a larger sepsis, renal failure, burns, trauma and cancer. Cachexia proportion of skeletal muscle mass. There are three is present in up to 50% of cancer patients and accounts pathways that contribute to muscle protein degradation: for at least 30% of cancer-related deaths overall (Palesty the lysosomal system, cytosolic proteases and the and Dudrick, 2003). The wasting of respiratory muscles ubiquitin (Ub)-proteasome pathway. The Ub-proteasome eventually causes these patients to succumb to pathway seems to account for the majority of skeletal pneumonia (Windsor and Hill, 1988).
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