<사례 1>Kim, H.J. The effect of thigh muscle resistance training on serum and muscle protein profiles by proteomic analysis in thigh muscle. Exercise science. The present study was performed to investigate the effect of 12 weeks of resistance training ...
<사례 1>Kim, H.J. The effect of thigh muscle resistance training on serum and muscle protein profiles by proteomic analysis in thigh muscle. Exercise science. The present study was performed to investigate the effect of 12 weeks of resistance training on skeletal muscle and serum protein profiles of thigh muscle in five healthy volunteers (26-30yrs). Percutaneous muscle biopsies and computed tomography were obtained from the same portion of thigh muscle at pre- and posttraining. Blood sampling after overnight fast was taken at pre and post of training. Resistance training regimen was composed of three kinds of weight lifting exercise (squart, leg press, leg extension; 2 sessions/wk, 4 sets/exercise, 8RM/set, 2 times/wk) for 12weeks. Protein profiles were compared using by two-dimensional electrophoresis (2DE) technique and the differentially expressed spots were identified by matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) analysis. Computed tomographic scans revealed the increase of the thigh muscle cross sectional area (CSA, 192.80± 6.50cm2 vs 215.15±5.55cm2, p<.05). The significantly increased (more than 200%) protein profiles in serum were hemopexin precursor, human albumin, haptoglobin, immunoglobulin gamma-1 heavy chain constant region, and complement C4A precursor. On the other hand up regulated spots were NADH dehydrogenase Fe-S protein 3, heat shock 27kDa protein 1, actin alpha 1 skeletal muscle protein, and ubiquitin in muscle tissue.
These results suggest that resistance exercise training, which increase muscle CSA by 11.6%, is associated with quantitave changes of protein profiles and these effects are independent from changing pattern of serum protein profiles.
key word : resistance training, proteomic analysis, 2DE (2-dementional electro phoresis), MALDI-TOF (matrix-assisted laser desorption/ionization-time-of flight)
<사례 2> The present study was performed to investigate muscle buffer capacity after 12 weeks of resistance training. Five healthy volunteers (26-30yrs) were participated in the present study. Percutaneous muscle biopsies and computed tomogram were obtained from the same portion of vastus lateralis muscle at pre- and post-resistance training. Resistance training regimen was composed of three kinds of weight lifting exercise (squart, leg press, leg extension; 2 sessions/wk, 4 sets/exercise, 8RM/set, 2 times/wk) for 12weeks. Extracts of biopsies of vastus lateralis were analysed for the content of carnosine, beta alanine, histidine and taurine using HPLC..Computed tomographic scans revealed an increase in cross sectional area of the thigh muscle (CSA, 192.80± 6.50cm2 vs 215.15±5.55cm2, p<.05). Both carnosine and taurine content were significantly increased by 31%(p<.01) and by 22% (p<.05), respectively. No alteration was occurred in histidine and β-alanine content after 12 week of resistance training.
In summary, the present study demonstrated that resistance exercise training induced a quantitave increase of carnosine content, which is suggesting an increase in intracellular buffering capacity, and may be associated with an increase in muscle CSA by 12%. The prospective of the present study supported the notion that power style resistance training may be more preferable measures to induce an increase in muscle buffer capacity.
key word : resistance training, carnosine, histidine, taurine, buffering capacity