Hyperphosphatemia Promotes Senescence of Myoblasts by Impairing Autophagy Through Ilk Overexpression, A Possible Mechanism Involved in Sarcopenia Sosa.

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Hyperphosphatemia Promotes Senescence of Myoblasts by Impairing Autophagy Through Ilk Overexpression, A Possible Mechanism Involved in Sarcopenia Sosa Patricia 1 ;Alcalde-Estevez Elena 1, 2 ;Plaza Patricia 1 ;Troyano Nuria 1 ;Alonso Cristina 3 ;Mart#cod#x000ED;nez-Arias Laura 4 ;Evelem de Melo Aroeira Andresa 1 ;Rodriguez-Puyol Diego 2, 5, 6 ;Olmos Gemma 1, 6 ;L#cod#x000F3;pez-Ongil Susana 2, 6 ;P. Ru#cod#x000ED;z-Torres Mar#cod#x000ED;a 1, 6 ; 1 System Biology Department, Alcala University, Alcal#cod#x000E1; de Henares, Madrid, Spain. ; 2 Research Unit, Biomedical Research Foundation from Pr#cod#x000ED;ncipe de Asturias University Hospital, Alcal#cod#x000E1; de Henares, Madrid, Spain. ; 3 Geriatric and Frailty Section, Getafe University Hospital, Getafe, Madrid, Spain. ; 4 Bone and Mineral Research Unit, Hospital Universitario Central de Asturias. Instituto de Investigaci#cod#x000F3;n Sanitaria del Principado de Asturias. Red de Investigaci#cod#x000F3;n Renal (REDinREN#cod#x0005D; del ISCIII. Oviedo. Spain ; 5 Nephrology Section, Biomedical Research Foundation from Principe de Asturias University Hospital, Alcal#cod#x000E1; de Henares, Madrid, Spain ; 6 Instituto Reina Sof#cod#x000ED;a de Investigaci#cod#x000F3;n Nefrol#cod#x000F3;gica, IRSIN, Madrid, Spain. ; Figure 7. Aged mice present elevated serum phosphate linked to higher expression of ILK and senescence genes and loss of muscle strength. Twenty-four-month-old mice Old were compared with five-month-old ones Young. A Serum phosphate concentration was assessed by a colorimetric method. Graph represents the mean #cod#x000B1; SEM from values obtained from 10 animals per group. #cod#x0002A; p#cod#x0003C; 0.05 vs young. B-D p53 B, ILK C and p62 D expression was evaluated by western blot in protein extracts isolated from vastus from old and young mice. A representative blot is shown in each case. Bar graphs represent the densitometric analysis of the bands. The results are expressed as a percentage of young mice and are the mean #cod#x000B1; SEM from ten animals per group. #cod#x0002A; p#cod#x0003C; 0.05 vs young. E Forelimb grip strength test was performed in young and old mice. Results are mean #cod#x000B1; SEM from ten animals per group. #cod#x0002A; p#cod#x0003C; 0.05 vs young. null,null,0(0),null-null. Doi:10.14336/AD.2017.1214