In treating patients with obstetric brachial plexus palsy,we noticed that denervated intrinsic muscles of the hand become irreversibly atrophic at a faster than denervated biceps.In a rat model of obstetric brachial p...In treating patients with obstetric brachial plexus palsy,we noticed that denervated intrinsic muscles of the hand become irreversibly atrophic at a faster than denervated biceps.In a rat model of obstetric brachial plexus palsy,denervated intrinsic musculature of the forepaw entered the irreversible atrophy far earlier than denervated biceps.In this study,isobaric tags for relative and absolute quantitation were examined in the intrinsic musculature of forepaw and biceps on denervated and normal sides at 3 and 5 weeks to identify dysregulated proteins.Enrichment of pathways mapped by those proteins was analyzed by Kyoto Encyclopedia of Genes and Genomes analysis.At 3 weeks,119 dysregulated proteins in denervated intrinsic musculature of the forepaw were mapped to nine pathways for muscle regulation,while 67 dysregulated proteins were mapped to three such pathways at 5 weeks.At 3 weeks,27 upregulated proteins were mapped to five pathways involving inflammation and apoptosis,while two upregulated proteins were mapped to one such pathway at 5 weeks.At 3 and 5 weeks,53 proteins from pathways involving regrowth and differentiation were downregulated.At 3 weeks,64 dysregulated proteins in denervated biceps were mapped to five pathways involving muscle regulation,while,five dysregulated proteins were mapped to three such pathways at 5 weeks.One protein mapped to inflammation and apoptotic pathways was upregulated from one pathway at 3 weeks,while three proteins were downregulated from two other pathways at 5 weeks.Four proteins mapped to regrowth and differentiation pathways were upregulated from three pathways at 3 weeks,while two proteins were downregulated in another pathway at 5 weeks.These results implicated inflammation and apoptosis as critical factors aggravating atrophy of denervated intrinsic muscles of the hand during obstetric brachial plexus palsy.All experimental procedures and protocols were approved by the Experimental Animal Ethics Committee of Fudan University,China(approval No.DF-325)in January 2015.展开更多
The study made an observation of electromyograph changes of biceps femoris muscle during contraction with different loads and at different speeds. The results indicated: the IEMG during fast contraction (one elbow fle...The study made an observation of electromyograph changes of biceps femoris muscle during contraction with different loads and at different speeds. The results indicated: the IEMG during fast contraction (one elbow flexion each second) and slow contraction (one elbow flexion every two seconds) with three loads (5kg, 10kg, 15kg) didnot show significant difference whether be fore or after fatiguel the MPF of fast contraction be fore fatigue was larger than that of slow contraction: the IEMG during dynamic contraction to fatigue (5kg, 10kg) was significantly larger than that before fatigue; with the loading of 15kg the IEMG after fatigue significantly decreased;the MPF decreased during contraction to fatigue at all loadings.展开更多
基金supported by the National Natural Science Foundation of China,No.816019591003263(to JXW)the National Basic Research Program of China(973 Program),No.2014CB542203(to LC)
文摘In treating patients with obstetric brachial plexus palsy,we noticed that denervated intrinsic muscles of the hand become irreversibly atrophic at a faster than denervated biceps.In a rat model of obstetric brachial plexus palsy,denervated intrinsic musculature of the forepaw entered the irreversible atrophy far earlier than denervated biceps.In this study,isobaric tags for relative and absolute quantitation were examined in the intrinsic musculature of forepaw and biceps on denervated and normal sides at 3 and 5 weeks to identify dysregulated proteins.Enrichment of pathways mapped by those proteins was analyzed by Kyoto Encyclopedia of Genes and Genomes analysis.At 3 weeks,119 dysregulated proteins in denervated intrinsic musculature of the forepaw were mapped to nine pathways for muscle regulation,while 67 dysregulated proteins were mapped to three such pathways at 5 weeks.At 3 weeks,27 upregulated proteins were mapped to five pathways involving inflammation and apoptosis,while two upregulated proteins were mapped to one such pathway at 5 weeks.At 3 and 5 weeks,53 proteins from pathways involving regrowth and differentiation were downregulated.At 3 weeks,64 dysregulated proteins in denervated biceps were mapped to five pathways involving muscle regulation,while,five dysregulated proteins were mapped to three such pathways at 5 weeks.One protein mapped to inflammation and apoptotic pathways was upregulated from one pathway at 3 weeks,while three proteins were downregulated from two other pathways at 5 weeks.Four proteins mapped to regrowth and differentiation pathways were upregulated from three pathways at 3 weeks,while two proteins were downregulated in another pathway at 5 weeks.These results implicated inflammation and apoptosis as critical factors aggravating atrophy of denervated intrinsic muscles of the hand during obstetric brachial plexus palsy.All experimental procedures and protocols were approved by the Experimental Animal Ethics Committee of Fudan University,China(approval No.DF-325)in January 2015.
文摘The study made an observation of electromyograph changes of biceps femoris muscle during contraction with different loads and at different speeds. The results indicated: the IEMG during fast contraction (one elbow flexion each second) and slow contraction (one elbow flexion every two seconds) with three loads (5kg, 10kg, 15kg) didnot show significant difference whether be fore or after fatiguel the MPF of fast contraction be fore fatigue was larger than that of slow contraction: the IEMG during dynamic contraction to fatigue (5kg, 10kg) was significantly larger than that before fatigue; with the loading of 15kg the IEMG after fatigue significantly decreased;the MPF decreased during contraction to fatigue at all loadings.
