Gender differences in muscle inflammation after eccentric exercise

2000 ◽  
Vol 89 (6) ◽  
pp. 2325-2332 ◽  
Author(s):  
N. Stupka ◽  
S. Lowther ◽  
K. Chorneyko ◽  
J. M. Bourgeois ◽  
C. Hogben ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Creatine Kinase ◽  
Muscle Damage ◽  
Eccentric Exercise ◽  
Kinase Activity ◽  
Morphological Changes ◽  
Vastus Lateralis ◽  
Creatine Kinase Activity ◽  
Blue Staining ◽  
Positive Staining

Unaccustomed exercise is followed by delayed-onset muscle soreness and morphological changes in skeletal muscle. Animal studies have demonstrated that women have an attenuated response to muscle damage. We studied the effect of eccentric exercise in untrained male ( n = 8) and female ( n = 8) subjects using a unilateral exercise design [exercise (Ex) and control (Con) legs]. Plasma granulocyte counts [before (Pre) and 48 h after exercise (+48h)] and creatine kinase activity [Pre, 24 h after exercise (+24h), +48h, and 6 days after exercise (+6d)] were determined before (Pre) and after (+24h, +48h, +6d) exercise, with biopsies taken from the vastus lateralis of each leg at +48h for determination of muscle damage and/or inflammation. Plasma granulocyte counts increased for men and decreased for women at +48h ( P < 0.05), and creatine kinase activity increased for both genders at +48h and +6d ( P < 0.01). There were significantly greater areas of both focal ( P < 0.001) and extensive ( P < 0.01) damage in the Ex vs. Con leg for both genders, which was assessed by using toluidine blue staining. The number of leukocyte common antigen-positive cells/mm2 tissue increased with exercise ( P< 0.05), and men tended to show more in their Ex vs. Con leg compared with women ( P = 0.052). Men had a greater total (Ex and Con legs) number of bcl-2-positive cells/mm2 tissue vs. women ( P < 0.05). Atrophic fibers with homogeneous bcl-2-positive staining were seen only in men ( n = 3). We conclude that muscle damage is similar between genders, yet the inflammatory response is attenuated in women vs. men. Finally, exercise may stimulate the expression of proteins involved in apoptosis in skeletal muscle.

Plasma creatine kinase activity and exercise-induced muscle damage in older men

1991 ◽  
Vol 23 (9) ◽  
pp. 1028???1034 ◽  
Author(s):  
THOMAS G. MANFREDI ◽  
ROGER A. FIELDING ◽  
KEVIN P. O??REILLY ◽  
CAROL N. MEREDITH ◽  
HO YONG LEE ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Muscle Damage ◽  
Kinase Activity ◽  
Older Men ◽  
Creatine Kinase Activity ◽  
Exercise Induced ◽  
Plasma Creatine Kinase ◽  
Plasma Creatine Kinase Activity

Myoglobinemia after burn injury: relationship to creatine kinase activity in serum.

1986 ◽  
Vol 32 (5) ◽  
pp. 857-859 ◽  
Author(s):  
J Guechot ◽  
N Lioret ◽  
L Cynober ◽  
C Letort ◽  
R Saizy ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Muscle Damage ◽  
Biological Markers ◽  
Kinase Activity ◽  
Burn Injury ◽  
Creatine Kinase Activity ◽  
Burn Patients ◽  
Thermal Burn ◽  
Burn Depth

Abstract Myoglobin is released into the blood after burn injury. We measured it and other analytes in blood collected from 22 burn patients two to seven times during their recovery. There was a significant correlation between myoglobinemia and creatine kinase (CK) activity in serum (r = 0.764; p less than 0.001). In a group of 14 thermal-burn subjects a correlation was found between burn depth (clinically expressed as Unit Burn Surface) and both myoglobinemia (r = 0.825; p less than 0.01) and CK activity (r = 0.686; p less than 0.01). In eight thermal-burn patients who were recovering satisfactorily, myoglobin and CK activity measured on days 2, 4, 7, 10, and 13 after injury were significantly increased (p less than 0.05) on days 2, 4, and 7. Evidently myoglobinemia and CK activity are good biological markers of burn depth, and reflect muscle damage equally well.

Low-intensity eccentric contractions of the knee extensors and flexors protect against muscle damage

2015 ◽  
Vol 40 (10) ◽  
pp. 1004-1011 ◽  
Author(s):  
Min-Ju Lin ◽  
Trevor Chung-Ching Chen ◽  
Hsin-Lian Chen ◽  
Bo-Han Wu ◽  
Kazunori Nosaka
Keyword(s):  
Creatine Kinase ◽  
Protective Effect ◽  
Muscle Damage ◽  
Muscle Soreness ◽  
Kinase Activity ◽  
Creatine Kinase Activity ◽  
Eccentric Contractions ◽  
Control Group ◽  
Control Groups ◽  
Low Intensity

This study investigated the magnitude and duration of the protective effect of low-intensity eccentric contractions (LowEC) against damage induced by maximal eccentric contractions (MaxEC) of the knee flexors (KF) and extensors (KE). Young men were assigned to 8 experimental groups and 2 control groups (n = 13/group); the experimental groups performed LowEC of KF or KE 2 days (2d), 1 week (1wk), 2 weeks (2wk), or 3 weeks (3wk) before MaxEC, while the control groups performed MaxEC of KF or KE without LowEC. The 2d, 1wk, 2wk, and 3wk groups performed 30 LowEC of KF or 60 LowEC of KE with a load of 10% of maximal voluntary isometric contraction strength on a resistance-training machine, and all groups performed 30 MaxEC of KF or 60 MaxEC of KE on an isokinetic dynamometer. Several muscle damage markers were measured from before to 2 days after exercise (LowEC) or from before to 5 days after exercise (MaxEC). No significant changes in any variables were evident after LowEC. The changes in all variables after MaxEC were smaller (P < 0.05) for the 2d and 1wk groups (e.g., peak creatine kinase activity: 1002 ± 501 IU/L; peak muscle soreness: 13 ± 5 mm) than for the control group (peak creatine kinase activity: 3005 ± 983 IU/L; peak muscle soreness 28 ± 6 mm) for both KE and KF. There were no significant differences between the 2d and 1wk groups or among the 2wk, 3wk, and control groups. These results show that LowEC provided 30%–66% protection against damage induced by MaxEC of KF and KE, and the protective effect lasted 1 week.

scholarly journals Mitochondrial creatine kinase activity and phosphate shuttling are acutely regulated by exercise in human skeletal muscle

2012 ◽  
Vol 590 (21) ◽  
pp. 5475-5486 ◽  
Author(s):  
Christopher G. R. Perry ◽  
Daniel A. Kane ◽  
Eric A. F. Herbst ◽  
Kazutaka Mukai ◽  
Daniel S. Lark ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Creatine Kinase ◽  
Human Skeletal Muscle ◽  
Kinase Activity ◽  
Creatine Kinase Activity ◽  
Mitochondrial Creatine Kinase

Creatine kinase:aspartate aminotransferase activity ratio as an indicator of the source of an increased creatine kinase activity.

1988 ◽  
Vol 34 (12) ◽  
pp. 2506-2510 ◽  
Author(s):  
D R Dufour
Keyword(s):  
Myocardial Infarction ◽  
Skeletal Muscle ◽  
Acute Myocardial Infarction ◽  
Creatine Kinase ◽  
Retrospective Study ◽  
Kinase Activity ◽  
Activity Ratio ◽  
Creatine Kinase Activity ◽  
Aminotransferase Activity ◽  
Creatine Kinase Isoenzyme

Abstract Although measurements of creatine kinase isoenzyme 2 (CK-MB) are often used to diagnose acute myocardial infarction, their sensitivity and specificity are less than 100%. Because skeletal muscle contains more CK and less aspartate aminotransferase (AST) than cardiac muscle, the CK/AST ratio might provide a useful adjunct in evaluating the source of a supranormal value for CK. I established the following decision levels in a retrospective study of 342 patients: ratios less than 14 (if total CK was 300-1200 U/L), less than 20 (CK 1201-2000 U/L), or less than 25 (CK greater than 2000 U/L) suggested myocardial infarction, with a sensitivity of 95% and a specificity of 65%. In a validation study with 277 additional patients, liver disease and alcohol abuse caused erroneous results, leading to exclusion of 22% of these patients. In the remaining cases, sensitivity was 94%, specificity 90%. The CK/AST ratios changed little with time, suggesting that a single value would be adequate for evaluating patients with increased CK.

D-2-Hydroxyglutaric acid inhibits creatine kinase activity from cardiac and skeletal muscle of young rats

2003 ◽  
Vol 33 (10) ◽  
pp. 840-847 ◽  
Author(s):  
C. G. Da Silva ◽  
A. R. F. Bueno ◽  
P. F. Schuck ◽  
G. Leipnitz ◽  
C. A. J. Ribeiro ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Creatine Kinase ◽  
Kinase Activity ◽  
Creatine Kinase Activity ◽  
Young Rats ◽  
Hydroxyglutaric Acid
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