Objective To investigate the effects of early pregnancy exposure to hazardous indoor air pollutants due to interior decoration and hyperthermia on neurobehavioral development of postnatal rats.Methods Twenty-two pregnant rats were randomly divided into 4 groups.Each group was placed in pollutants cabinet,hyperthermia cabinet,hyperthermia+pollutants cabinet and empty cabinet respectively for 2 h per day for 10 d since their pregnancy.The weight and neurobehavioral development of postnatal rats were observed at different time points.The number of apoptotic and dead neurons in the CA1 region of hippocampus was observed in postnatal rats.The expression of the NR1 subunit of NMDA receptor of hippocampal neurons was also detected.Results Indoor pollutants and hyperthermia could accelerate apoptosis and necrosis of hippocampal neurons in CA1 region of postnatal rats and increase the expression of NR1 subunit of NMDA receptor.Furthermore,hazardous indoor pollutants and hyperthermia could induce remarkable influences on postnatal rats’ neurobehavioral development,learning and memory capability.Indoor pollutants combined with hyperthermia aggravated these effects.Conclusion Exposure to environment of the hazardous indoor pollutants especially combined with hyperthermia during early pregnancy has remarkable influences on the nervous system of postnatal rats.

Objective To observe the effect of comprehend intervention on physical and intellectual development of homeless infants.Methods Forty-eight infants aged 8 to 9 months from an orphanage of Chongqing were randomly divided into control group and treatment group.The treatment group received swim,early training and massage every day.All infants were assessed by means of Gesell Development Scale before intervention and one month after intervention.Results Compared with that of the control group,the treatment group's scores significantly improved in all four ergoregion(P

Objective To observe the effects of chemical compounds exposure and hyperthermal environment to pregnant rats on the hippocampus neuronal morphology and neurobehavioral development of their offsprings. MethodsPregnant rats were divided into 4 groups randomly: the control group; chemical compounds exposure group, chemical compounds combined hyperthermal exposure group and hyperthermal group. The control group was living in normal condition; the chemical compounds exposure group in a cabin with benzene (20.26?0.80) mg/m3, toluene (39.66?4.23) mg/m3, dimethylbenzene (42.40?2.85) mg/m3, and formaldehyde (23.13?1.30) mg/m3; the hyperthermal group was kept in an atmosphere of 38.5 ℃; and the combined group was exposed to the chemical compounds and high temperature at the same time. All animals were treated respectively 2 h per day for 10 d since their pregnancy. Their offspring were lived in normal condition. The development of brain and changes of hippocampus neuronal morphology were observed just or 1 month after born. The primary reflex activity of new-born rats was also examined. ResultsThere was no abnormality in the brain of new born rats from 4 groups. In the chemical compounds exposure and the combined exposure groups, the number of degeneration and necrosis neurons in CA1 region of hippocampus were significantly more than those in control and hyperthermal groups (P

Objective To investigate the myelination of rat brain at different developmental stages.Methods Luxol fast blue staining,immunohistochemistry and Western blotting were applied to determine the distribution and alternation of myelin sheath in the brains of SD rats at different developmental stages.Results Negative LFB and MBP staining were shown at the stages of embryonicage 18 d(E18),postnatal age 0 d(P0) and P2.At P7,the corpus callosum was weakly stained by LFB.The positive stain of LFB and MBP occurred in P15 on the corpus callosum.With the development going on,the stain turned out stronger,especially in P30,which was similar with that in P90 and P720.The results of Western blot analysis showed the expression of MBP in rat brain was gradually increased with the development of rat brain.Conclusion The myelination starts before P15 in rat brain and becomes mature in P30.The optimal observation time of myelin is 30 d born after.

Angiogenesis is of great importance to a variety of normal physiological processes and pathological disorders.It is tightly regulated by many mechanisms, among which vascular endothelial growth factor(VEGF) is one of the most potent promoters.VEGF binds and activates its specific receptor tyrosine kinases, especially vascular endothelial growth factor receptor-2(VEGFR-2).VEGFR-2 mediates the key functional and biochemical effects of VEGF in endothelial cells including proliferation, migration, survival, and permeability.Following its binding to VEGF, VEGFR-2 dimerizes and undergoes autophosphorylation on tyrosine residues within its cytoplasmic portion.This creates docking sites for adapter molecules to be recruited through their Src homology domain-2(SH2).These adapter molecules can then initiate the activation of downstream signaling cascades.Further down-stream effector molecules are activated, and regulate the biological effects of endothelial cells.It is also foound that VEGF/VEGFR-2 signaling pathway may negatively regulate the function of human monocyte-derived mature dendritic cells(DCs) as well as the maturation of immature-DCs.Advances in the understanding of the VEGF/VEGFR-2 signaling pathway may contribute to the discovery of kinds of pharmaceutical agents.

Breast cancer is the principal cause of death in malig-nancy women , usually treated with the combination of surgery , chemotherapy , radiotherapy and endocrinotherapy .With the de-velopment of cell biology , molecular biology , immunology, im-munotherapy becomes a new field of breast cancer treatment .In this review, we discuss new findings in breast cancer immuno-therapy , including recent successes with bispecific antibodies and immune checkpoint blockade .We also discuss therapeutic cancer vaccines and highlight several additional immunotherapy modalities in early stages of development .

Objective To study the cell apoptosis after injecting NS398 in neonatal rat brain injured by hypoxia and ischemia.Methods The model of hypoxic-ischemic brain damage(HIBD)was established in 48 Wistar rats.Intraperitoneal injection of NS398 at dose of 5,20,40 mg/kg respectively was carried out in 36 HIBD rats 30 min before hypoxia.There were also sham operation group in which the normal saline took the place of NS398.Ischemic cortex and hippocampus were sampled for analysis at 24 h,and 7 d after the onset of hypoxic-ischemic damage.The expression and number of apoptotic cells in the cortex and hippocampus were examined with TUNEL.Results The percentage of TUNEL-positive cells in HIBD group was higher than that of sham operation group.The percentage of TUNEL-positive cells in NS398 groups significantly decreased as compared with that of HIBD group.NS398 group at dose of 20 mg/kg was of no difference with NS398 group at dose of 40 mg/kg,but significantly lower than NS398 group at dose 5 mg/kg.Conclusion NS398 can reduce the TUNEL-positive cells,and 20 mg/kg and 40 mg/kg are the more effective dosage.NS398 is of the effective capability to inhibit the brain damage in the growth period when HI happened.

Objective To study the expression of cyclooxygenase 2 (COX-2) in neonatal rats after hypoxic-ischemic brain damage (HIBD). Methods A model of HIBD in the left brain of 7-day-old Wistar rats was established. The ischemic cortex was sampled for analysis at 2, 6, 24, and 72 h, and 7 d after the onset of hypoxic-ischemic damage. The expression and number of the positive cells of COX-2 in the cortex and hippocampus at different time points were observed by immunohistochemistry. Results Low level of COX-2 immunohistochemical expression was observed in the control group. COX-2 positive cells were upregulated in ischemic brain at 2 h and peaked between 6-24 h significantly (P

Objective To investigate the pathogenic factors and the visceral involvement in murine disseminated trichosporonosis caused by Trichosporon asahii. Methods Forty-five mice were immunosuppressed with cyclophospamide 3 days hefore and 7 days after inoculation of T. asahii, and were divided into intravenously inoculated group (n = 15), intradermal inoculated group (n = 7), gastrointestinal infusion group (n = 8), intravenously inoculated + treatment group (n = 15). In the control groups the mice were not immunosuppressed, and were also divided into intravenous, intradermal, and G.I. infusion groups with the same number of mice respectively. In the treatment group the mice were given both liposomal amphotericin B and fluconazole. The main viscera of the mice were examined by mycologic culture and pathologic sections. Results In the intravenous inoculation group of immunized mice, Trichosporon asahii were isolated from at least one organ in 10/12 mice, while T. asahii were only isolated in 2/14 mice in the control group; in 2/7 mice of the intradermal group of immunosuppressed mice, skin lesion appeared at the inoculation site, but no visceral infection was observed. No visceral infection was found in the groups that T. asahii was inoculated by non-intravenous injection in both immunosuppressed and non-immunosuppressed mice. The number of mice died, the number of visceral organs involved and the incidence of systemic infection were significantly less in the treatment group than those in the non-treatment groups (P

Objective To observe the effectof Invigorating Spleen and Eliminating DampnesGranuleon calcitonin gene related peptide(CGRP) in ramodelof diarrhepredominanirritable bowel syndrome (D-IBS) .Method60 Wistaratwere ran-domly divided into the control group(n=10) and the constructing model group (n=50) .Then ,the constructing model group warandomly re-divided into the model group (n= 10) ,positive control group (n= 10) ,invigorating spleen and eliminating dampnesGranulelow ,middle and high dose groups(n=10 each) .The D-Ibramodel waestablished by the restrainstresstimulation and gavage of folium sennae decoction fo2 week.The expression of CGRP in small intestinal mucosal membrane in each group wadetected by the immunohistochemical method .ResultIn the model group ,the CGRP positive arewadecreased ,which showed the statistical difference compared with the control group (P＜0 .05);the CGRP positive arein varioutreatmengroupwaincreased ,which showed the statistical difference compared with the model group (P＜0 .05);in the invigorating spleen and e-liminating dampnesgranulemiddle and low dose group,the CGRP positive arewaincreased with the statistical difference com-pared with the positive control group (P＜0 .05) ,while withouthe statistical difference compared with the invigorating spleen and eliminating dampnesgranulehigh dose group (P＞0 .05) .Conclusion Invigorating spleen and eliminating dampnesgranulea-chievethe therapeutical effecby increasing the level of CGRP in local intestinal tissue .