Objective:To study the effect of immune regulation of the rat Leydig cells in testis infection.Methods:UU was injected into the bladders of rats,which mimics the ascending infection pathway,while using culture medium injection as control.After 1,2,3 w respectively,the rats were sacrificed to observe the pathological alterations in testis by histological examination.Leydig cell were also separated from testis,the comparation of levels of IL-1,IL-6,TGF-?,Fas and FasL mRNA expression among control and UU infected groups was made by RT-PCR.Results:Compared with control,in UU infected group,the levels of IL-1,IL-6,TGF-? increased,the level of Fas decreased,the level of FasL increased.Conclusion:Leydig cell can play the role of immune regulation,with the expressing changes of IL-1,IL-6,TGF-?,Fas and FasL in the infection of testis in rat.

OBJECTIVETo study the short-term response and tolerance of different doses of amino acids in parenteral nutrition among preterm infants.

METHODSThis study included 86 preterm infants who had a birth weight between 1 000 to 2 000 g and were admitted to the hospital within 24 hours of birth between March 2013 and June 2014. According to the early application of different doses of amino acids, they were randomized into low-dose group (n=29, 1.0 g/kg per day with an increase of 1.0 g/kg daily and a maximum of 3.5 g/kg per day), medium-dose group (n=28, 2.0 g/kg per day with an increase of 1.0 g/kg daily and a maximum of 3.7 g/kg per day), and high-dose group (n=29, 3.0 g/kg per day with an increase of 0.5-1.0 g/kg daily and a maximum of 4.0 g/kg per day). Other routine parenteral nutrition and enteral nutrition support were also applied.

RESULTSThe maximum weight loss was lower and the growth rate of head circumference was greater in the high-dose group than in the low-dose group (P<0.05). The infants in the medium- and high-dose groups had faster recovery of birth weight, earlier attainment of 100 kcal/(kg·d) of enteral nutrition, shorter duration of hospital stay, and less hospital cost than those in the low-dose group (P<0.05). Blood urea nitrogen (BUN) levels in the high-dose group increased compared with the other two groups 7 days after birth (P<0.05). The levels of creatinine, pH, bicarbonate, bilirubin, and transaminase and the incidence of complications showed no significant differences between groups (P>0.05).

CONCLUSIONSParenteral administration of high-dose amino acids in preterm infants within 24 hours after birth can improve the short-term nutritional status of preterm infants, but there is a transient increase in BUN level.

Amino Acids ; administration & dosage ; Birth Weight ; Blood Urea Nitrogen ; Female ; Humans ; Infant, Newborn ; Infant, Premature ; Male ; Nutritional Status ; Parenteral Nutrition ; adverse effects

With potent biological activities, cellular growth factors are polypeptide factors that primarily stimulate cell growth and proliferation. They participate in the regulation of not only normal physiological functions such as human embryonic development and cell growth, but also neurorehabilitation and neuroplasticity in pathological processes such as nerve injury and recovery. Specifically, cellular growth factors have been shown to promote neuron survival, facilitate nerve regeneration and regulate synaptic plasticity, promote cell differentiation/vascular regeneration and modulate the microenvironment, promote nerve fiber myelination and improve nerve conduction. This review summarized current knowledge on the roles and various growth factors in neurorehabilitation and neuroplasticity, providing an update on potential clinical application of cellular growth factors in the field of neural rehabilitation.

OBJECTIVE: To design and construct a graphene oxide (GO)/silver nitrate (Ag₃PO₄)/chitosan (CS) composite coating for rapidly killing bacteria and preventing postoperative infection in implant surgery. METHODS: GO/Ag₃PO₄ composites were prepared by ion exchange method, and CS and GO/Ag₃PO₄ composites were deposited on medical titanium (Ti) sheets successively. The morphology, physical image, photothermal and photocatalytic ability, antibacterial ability, and adhesion to the matrix of the materials were characterized. RESULTS: The GO/Ag₃PO₄ composites were successfully prepared by ion exchange method and the heterogeneous structure of GO/Ag₃PO₄ was proved by morphology phase test. The heterogeneous structure formed by Ag₃PO₄ and GO reduced the band gap from 1.79 eV to 1.39 eV which could be excited by 808 nm near-infrared light. The photothermal and photocatalytic experiments proved that the GO/Ag₃PO₄/CS coating had excellent photothermal and photodynamic properties. In vitro antibacterial experiments showed that the antibacterial rate of the GO/Ag₃PO₄/CS composite coating against Staphylococcus aureus reached 99.81% after 20 minutes irradiation with 808 nm near-infrared light. At the same time, the composite coating had excellent light stability, which could provide stable and sustained antibacterial effect. CONCLUSION GO/Ag₃PO₄/CS coating can be excited by 808 nm near infrared light to produce reactive oxygen species, which has excellent antibacterial activity under light.
Chitosan ; Silver Nitrate ; Titanium ; Anti-Bacterial Agents/pharmacology* ; Coloring Agents