Femoral nerve repair using an h-type nerve regeneration chamber in rats.

Peripheral nerve injury in surgical trauma patients is very common. The femoral nerve can be divided into two branches: one regarding the quadricep muscles and one the skin. After nerve transection and suture, the motor axons have an equal opportunity to regenerate into the original muscle branch, or regenerate into the sensory skin nerves. These anatomical features of femoral nerve have made it important in nerve regeneration research. Thus, this study was designed to examine the effects of an H-type nerve regeneration chamber on motor nerve regeneration after femoral nerve injury. We performed femoral nerve injuries in adult rats and assessed nerve recovery over a 4-week post-operative period. Additionally, we evaluated nerve regeneration in the same animals anatomically, using several histological staining methods to provide structure analyses. We found that H-type nerve regeneration chamber provided enhanced improvement in nerve regeneration without nerve anastomosis, as compared with nerve anastomosis. Furthermore, incorrect nerve anastomosis reduced the nerve fiber diameter and thickness of myelin sheaths in regenerated nerve fibers. Finally, H-type nerve regeneration chamber provided enhanced functional recovery of nerve fibers, particularly for motor nerves. Together, our results suggest that direct nerve suture cannot effectively improve the functional recovery of damaged nerves, and nerve chemotaxis coupled with nerve regeneration chamber can effectively improve the effects of nerve regeneration, and enhance the prognosis of nerve injury repair.

Femoral nerve repair using an H-type nerve regeneration chamber in rats.

Peripheral nerve injury in surgical trauma patients is very common. The femoral nerve can be divided into two branches: one regarding the quadricep muscles, and one the skin. After nerve transection and suture, the motor axons have an equal opportunity to regenerate into the original muscle branch, or regenerate into the sensory skin nerves. These anatomical features of femoral nerve have made it important in nerve regeneration research. Thus, this study was designed to examine the effects of an H-type nerve regeneration chamber on motor nerve regeneration after femoral nerve injury. We performed femoral nerve injuries in adult rats and assessed nerve recovery over a 4-week post-operative period. Additionally, we evaluated nerve regeneration in the same animals anatomically, using several histological staining methods to provide structure analyses. We found that H-type nerve regeneration chamber provided enhanced improvement in nerve regeneration without nerve anastomosis, as compared with nerve anastomosis. Furthermore, incorrect nerve anastomosis reduced the nerve fiber diameter and thickness of myelin sheaths in regenerated nerve fibers. Finally, H-type nerve regeneration chamber provided enhanced functional recovery of nerve fibers, particularly for motor nerves. Together, our results suggest that direct nerve suture cannot effectively improve the functional recovery of damaged nerves, and nerve chemotaxis coupled with nerve regeneration chamber can effectively improve the effects of nerve regeneration, and enhance the prognosis of nerve injury repair.

Association between IL-1α rs17561 and IL-1ß rs1143634 polymorphisms and periodontitis: a meta-analysis.

Genetic variations in human interleukin-1 (IL-1) genes are known to be involved in inflammatory disorders. The rs17561 and rs1143634 polymorphisms of IL-1α and IL-1ß, respectively, have been increasingly recognized as important regulators in the development of periodontitis. However, the existence of a specific association remains controversial. Therefore, we performed a meta-analysis to explore the relationship between IL-1 polymorphism and periodontitis risk. Based on our inclusion criteria, six case-control studies were used, involving a total of 336 periodontitis cases and 366 healthy controls. Our meta-analysis results showed that the T allele of IL-1α rs17561 is positively associated with periodontitis susceptibility. In addition, carriers of this allele (TC + TT genotypes) demonstrated increased risk of this disease. The IL-1ß rs1143634 T allele was also positively connected to periodontitis, with TC + TT genotype carriers being significantly more at risk. These results demonstrate that the IL-1α rs17561 and IL-1ß rs1143634 polymorphisms are associated with periodontitis.

Femtosecond laser-drilling-induced HgCdTe photodiodes.

Femtosecond-laser drilling may induce holes in HgCdTe with morphology similar to that induced by ion-milling in loophole technique. So-formed hole structures are proven to be pn junction diodes by the laser beam induced current characterization as well as the conductivity measurement. Transmission and photoluminescence spectral measurements on a n-type dominated hole-array structure give rise to different results from those of an ion-milled sample.