Obesity is a severely public health problem the whole society faces, and it is correlated closely with many diseases, such as diabetesⅡ, hypertension, coronary heart disease,gallstone, and so on. Therefore it threatens people's survival quality severely. Obesity is a multiple-factor disease including genetic, metabolic and behavioral factor, and the gene is the main determining factor. With the development of molecular biology technique, people have founded several genes involved in obesity. Among these genes, the research on obese gene is the most profound. The protein leptin is the expression product of the obese gene. This review elucidates the structure, the main biological function, the mechanism of leptin and it's relationship with obesity.

Further study of the effect of monosodium glutamate on body temperature using rabbits as experimental model by repeatedly intravenous injection of MSG. The experimental results showed that the body temperature of rabbits were decreased significantly at a time of each day consecutively for three days with medium dose MSG(0.5g/kg/day) However, this effect was disappeared following the fourth administration of MSG a week later, and so did the fifth administration of MSG two weeks later. Those results suggested that the disappearance of decreased body temperature by MSG may be due to tolerance development after MSG was administrated repeatedly. The authors proposed two hypotheses of mechanisms for the development of MSG"tolerance". which would be investigated further.

OBJECTIVE:To investigate the effects of multidrug resistance gene 1(MDR1)C3435T polymorphism on the dose of analgesia agents(dezocine combined with sufentanil)after joint replacement. METHODS:300 patients receiving joint replace-ment were selected from Tianjin People's Hospital and Tianjin Port Hospital during Jan. 2014-Feb. 2016. They were given dezocine and sufentanil for postoperative analgesia. PCR-RFLP was used to determine MDR1 C3435T polymorphism;VAS scores,Ramesy scores,the dose of dezocine+sufentanil and the occurrence of ADR were compared among different genotypes. RESULTS:Among 300 patients,there were 100(33.3%),102(34.0%)and 98(32.7%)cases of MDR1 C3435T CC,CT and TT genotype,respec-tively,the frequencies of which were all in line with Hardy-Weinberg balance (P>0.05). There was no statistical significance in VAS scores and Ramesy scores among different genotypes 0,24,48 h after surgery(P>0.05). No excessive sedation was found. The dose of dezocine+sufentanil in CT and TT genotype were all significantly lower than CC genotype 0-24 h,>24-48 h after sur-gery,with statistical significance(P<0.05). There was no statistical significance in drug dose between CT and TT genotype during above periods (P>0.05). The incidence of postoperative nausea and vomiting (PONV),ADR in TT genotype were significantly lower than CC and CT genotypes,with statistical significance (P<0.05). There was no statistical significance in the incidence of PONV and ADR between CC genotype and CT genotype,and in the incidence of itch among different genotypes(P>0.05). CON-CLUSIONS:With similar sedation and analgesic effect,MDR1 mutant type have lower resistance to dezocine+sufentanil,and smaller drug dose is need,the incidence of ADR is lower. MDR1 genotype can be regarded as an important indicator of clinical in-dividualized treatment.

Objective To evaluate the therapeutic effect of transanal local excision in the treatment of low rectal cancer.Methods The data of 49 cases of low rectal cancer patients treated by transanal local excision (group A,37 cases of T1 patients and 12 cases of T2 patients) were reviewed retrospectively,and compared with the group of 45 cases treated by radical resection( group B,11 cases of T1 patients and 34 cases of T2 patients).The 5-year survival rates,recurrence rates and postoperative complications between the two groups were compared.Results The incidence of postoperative complications in group A was significantly lower than that in group B(4.1％ vs 15.6％,x2 =4.69,P ＜0.05 ).The 5-year survival rate of group A was 97.9％ and the 5-year survival rate of group B was 95.6％.There was no significantly statistical difference on the 5-year survival rate between the two groups( x2 =0.439,P ＞ 0.05 ).But for the T2 patients,the recurrence rates in group A was 33.3％,which was significantly higher than the T2 patients in group B(5.9％ ) ( x2 =5.89,P ＜0.05 ).All patients with low histopathological grade tumor in group A showed postoperative recurrence and metastasis.Conclusion Transanal local excision with a rigid criteria can get good curative effect in the T1 patients,but not suitable for the T2 patients or patients with low histopathological grade tumor.

With 58 of New Zeeland rabbits, following experiments were carried out: (1) the dose-response relationship of MSG which decreased the body temperat ure; (2) the effects of the propranolol and the anisodamine (654-2) on the action of decreasing body temperature by MSG. The results indicated: following intravenous administration of MSG at a dose of 0.5g/kg. w and 1.0g/kg. w, the body temperature of rabbits were decreased significantly, but at a dose of 0.1g/kg.w, the change of temperature was insignificant.Pretreatment with propranolol did not affect the effect of MSG decreasing body temperature which was blocked significantly by anisodamine, one of blocker of the cholinergic nerve. The authors suggest that the effect of MSG decreasing body temperature may depend on the cholinergic nerve.

Objective To research whether the inhibitory oligonucleotides could improve the immune status of the BXSB mice. The purpose was to provide a valuable direction for treating systemic lupus erythematosus. Methods 3-month-old BXSB lupus mice were divided into three groups (including inhibitory oligonucleotides group, saline group and blank control group). The 24 hours urine proteins were determined before treatment. After treatment,the urine protein, anti-dsDNA, peripheral blood lymphocytes apoptosis and immune complex in renal glomeruli were measured. Results Before treatment,the urine proteins had no statistical differences among the three groups ( P > 0.05 ).After treatment,the urine protein, anti-dsDNA levels in inhibitory oligonucleotides group were significantly lower than that of control group(P < 0.01 ). Apoptosis of peripheral blood lymphocytes in inhibitory oligonucleotides group was significantly higher than that of control group( P < 0.05 ) ,immune complex in renal glomeruli in inhibitory oligonucleotides group was significantly lower than that of the other groups ( P < 0.05 ). Compared with saline group, inhibitory oligonucleotides had prolonged life period of BXSB mice ( P < 0.01 ). Conclusion The inhibitory oligonucleotides could improve immune status of BXSB, and could put off the disease progression.

Day care is described in the paper in terms of its meaning and management.As to areas deserving attention given the initial success,the authors proposed to priortize medical insurance compensation policy,medical resource deployment,patient safety and follow-up for discharged patients.These efforts may further quality of care and patient satisfaction.

Aim To investigate the the effect of ginsenosides of stem and leaf(GSL) on mouse fatty liver and its mechanism.Methods Mice were randomly divided into normal control group(NC,fed with normal diet) and model group(fed with high-fat diet).Twelve weeks later,when the establishment of experimental model of fatty liver was confirmed,the model mice were subdivided into 4 subgroups: HF group(fed continuously with high-fat deit),NT group(fed with normal deit),GSL1 group(fed with normal deit and treated intragastrically with GSL 50 mg?kg-1?d-1),GSL2 group(fed with normal deit and treated intragastrically with GSL 100 mg?kg-1?d-1).Mice in NC,HF and HT groups were given distilled water by gastric perfusion.Two weeks later,all mice were killed,and blood was collected for measuring serum TC,TG,HDL-C,LDL-C,ALT contents,liver tissue for determining hepatic TC,TG,MDA SOD levels.In addition,liver index and pathology were also observed.Expression of PPAR? and CYP2E1 mRNA in liver was examined by RT-PCR.Results In GSL2 group,GSL significantly reduced liver index,serum lipid,hepatic lipid and MDA contents,and elevated SOD activity.Moreover,GSL obviously improved pathological change,increased PPAR? mRNA and suppressed CYP2E1 mRNA levels in the liver.In NT group,hepatic lipid and MDA contents remained high and SOD activity is low,although liver histology somewhat improved.In GSL1 group the results were similar to those in NT group.Conclusions These results suggest that GSL might be effective in the treatment of hepatic adipose infiltration of mice.It may be associated with increasing PPAR? mRNA,then decreasing serum lipid and hepatic lipid;and inhibiting CYP2E1 mRNA expression in the liver,thus suppressing lipid peroxidation.

AIM: To investigate the protective effects of berberine against liver injury induced by lipopolysaccharide in mice and the mechanisms underlying its protective effect.METHODS: The male mice were divided randomly into control,berberine group,LPS group and berberine treatment group.Mice were administered intragastrically with distilled water(0.01 mL/g) or(5 g/L) neutral sulfate berberine(0.01 mL/g) once a day for 5 days and injected intraperitoneally with normal saline or LPS(0.02(mL/g),28 mg/kg)at 1 h after gavage on day 5.Blood was collected for determining alanine aminotransferase(ALT) and aspartate aminotransferase(AST) activities,the content of tumor necrosis factors-?(TNF-?) at 10 h and 2 h after LPS or normal saline injection,respectively.Furthermore,the liver tissue was processed,and histological changes and ultrastructure in liver were observed with light and electron microscopy,malondialdehyde(MDA) content and superoxide dismutase(SOD) activity in liver were also detected.RESULTS: Both ALT and AST activities in serum in LPS group were higher than those in control and berberine treatment group.LPS increased the serum TNF-? content at 2 h after injection,which was reversed by berberine pretreatment.The histological examination showed that LPS caused severe hepatic cell edema,degeneration,apoptosis and even necrosis,and ultrastructure observation demonstrated that LPS induced mitochondrial swelling,condensation and margination of chromatin,irregular nuclear envelope in hepatocytes.The above pathological changes produced by LPS were attenuated by berberine pretreatment.Moreover,MDA contents in liver tissue were higher in LPS group than control and berberine treatment group,but there were no significant difference in SOD activity between berberine treatment and LPS group.CONCLUSION: Berberine has a protective effect on LPS-induced liver injury in mice,the mechanisms may be related to its decreasing the production of TNF-?,inhibiting lipid peroxidation and protecting mitochondria.

AIM and METHODS: To investigate the effect of electrical stimulation of ventlal septal area (VSA) on discharge of pyrogen - treated thermosensitive neurons in preoptic anterior hypothalamus (POAH) region, the discharging rate of thermosensitive neurons in the POAH region of 32 New Zealand white rabbits were recorded by using extracellular microelectrode techinque. RESULTS: (1) Intraceretroventricularly (i c v) injection of interleukin - 1?(IL - 1?) caused decrease of discharging rate of warm - sensitive neurons and increased in discharging rate of cold - sensitive neurons in POAH regions. (2) These effects could be reversed by electrical stimulation of VSA. CONCLUSION: VSA may play a central role of negative regulation in thermoregulation of pyrogen - treated animal.