8 research outputs found
Gas7-Deficient Mouse Reveals Roles in Motor Function and Muscle Fiber Composition during Aging
Background: Growth arrest-specific gene 7 (Gas7) has previously been shown to be involved in neurite outgrowth in vitro; however, its actual role has yet to be determined. To investigate the physiological function of Gas7 in vivo, here we generated a Gas7-deficient mouse strain with a labile Gas7 mutant protein whose functions are similar to wild-type Gas7. Methodology/Principal Findings: Our data show that aged Gas7-deficient mice have motor activity defects due to decreases in the number of spinal motor neurons and in muscle strength, of which the latter may be caused by changes in muscle fiber composition as shown in the soleus. In cross sections of the soleus of Gas7-deficient mice, gross morphological features and levels of myosin heavy chain I (MHC I) and MHC II markers revealed significantly fewer fast fibers. In addition, we found that nerve terminal sprouting, which may be associated with slow and fast muscle fiber composition, was considerably reduced at neuromuscular junctions (NMJ) during aging. Conclusions/Significance: These findings indicate that Gas7 is involved in motor neuron function associated with muscle strength maintenance
Effects of Scalp Acupuncture on Functional Deficits Induced by Early Sensorimotor Restriction
A survey of Senecio spp. affecting livestock in Uruguay and their associated pyrrolizidine alkaloid content
Esporte adaptado: abordagem sobre os fatores que influenciam a prática do esporte coletivo em cadeira de rodas
Este ensaio suscita uma discussão acerca da complexidade do esporte adaptado, diante da forma reducionista como o fenômeno tem sido definido ao longo do tempo. Entende-se que este é um construto complexo e, portanto, a abordagem para o seu entendimento deve ser de pensamento complexo. Foram discutidos os vários aspectos relacionados à prática do esporte pelas pessoas com deficiência e como os trabalhos devem ser conduzidos neste campo. Embora o esporte adaptado tenha efeitos positivos sobre variáveis como reabilitação e inclusão social, este não pode ser definido apenas com base nestas questões e sim como um fenômeno complexo e abrangente
