Uric acid is an end product of purine degradation in humans and normally depends upon renal excretion for the majority. Hyperuricemia is likely to cause gout, renal disease, or stones, and associated with cardiovascular impairment over the long term. The prevalence of gout and hyperuricemia appears to be on the increase in recent years. The present paper reviews the relationships between hyperuricemia and insulin resistance,purine metabolism and uric acid elimination , the genetics study and the mechanisms of hyperuricemia.

Hyperuricemia is induced by the mechanism of the elevated production of uric acid or the decreased renal excretion of uric acid. At present, there are three major methods to establish models for hyperuricemia: first, it will elicit pronounced hyperuricemia when feeding or injecting the animal with hypoxanthine 600～1000 mg?kg -1 , xanthine 600 mg?kg -1 , adenine 150～300 mg?kg -1 , yeast 15～30 g?kg -1 , uric acid 250 mg?kg -1 or 350～700 mg?kg -1 because of the elevated serum uric acid. Such effect will be also observed as administrating the animal with the inhibitors of uric acid excretion such as ethambutol 250 mg?kg -1 , nicotinic acid 100 mg?kg -1 at the same time of the above steps. Second, being an uricase inhibitor, when fed the rats 0 4 g?d -1 and uric acid 0 6 g?d -1 for 3～4 weeks, oxonic acid is able to cause the continuously elevated serum uric acid. Similarly, when potassium oxonate 300 mg?kg -1 ip only once, the serum uric acid in mice will be also elevated. Third, to destruct the urate oxidase gene (EC 1.7.3.3) in the mouse by homologous recombination in embryonic stem cells, and then the oxidase deficient mutant mouse as the hyperuricemia model, is generated by gene recombination.The rats and the mice have urate oxidase, which can decompose the uric acid to allantoin, while the avian (such as chicken, coturnix and so on) have not.

Objective To investigate the value of lapa ro scopic surgery in the diagnosis and treatment of bile duct diseases in newborns and infants. Methods Clinical records of 9 newborns or infants with bile duct diseases diagnosed and treated under laparoscope from January 20 03 to August 2004 in this hospital were reviewed retrospectively. Resul ts Laparoscopic exploration in the 9 cases found 2 cases of congenital choledochal cyst, 5 cases of biliary atresia, 1 case of cholestasis, and 1 case of congenital bile duct hypoplasia. Cholangiography was successfully performed i n 8 cases. Two patients with choledochal cyst received an excision of the cyst a nd Roux-en-Y hepatico-jejunostomy. Among the 5 patients with biliary atresia, he patic porto-enterostomy was performed via open approach in 3 patients and via la paroscopic approach in 1, and surgery was refused in 1 patient. Open hepatic por to-enterostomy was also used in the patient with bile duct hypoplasia. The patie nt with cholestasis underwent a biliary tract irrigation. Conclusions Laparoscopy is simple and reliable in the diagnosis of bile duct disease s in newborns and infants. For the treatment of bile duct diseases, laparoscopic techniques have advantages of minimal invasion, good cosmetic results, less blo od loss, quick recovery, and reliable clinical effects.

Objective To explore the feasibility of tw o- port laparoscopy in the treatment of congenital hypertrophic pyloric stenosis. Methods A total of 21 infants with confirmatively diagnosed con genital hypertrophic pyloric stenosis were given a two-port laparoscopic pylorom yotomy. The procedure was performed using two trocars: a 5 mm trocar at the lowe r border of the umbilical ring was placed for the insertion of camera, and a 3 m m trocar was introduced below the costal margin at the midclavicular line to pas s the hook electrode and curved forceps. Results No conversion s to open surgery were required. The operation time was 23~65 min (mean, 31.3 mi n). The patients were discharged from hospital at 4~6 postoperative days. No com plications occurred. Follow-up for 2~7 months (mean, 3.2 months) showed a norma l development in all the 21 patients. Conclusions Two-port lap aroscopic treameat for congenital hypertrophic pyloric stenosis in infants is ef fective.

Objective To explore the causes and treatment of the complications after laparoscopic surgery in neonate and infants.Methods From January 2003 to June 2007,totally 287 neonates and infants received laparoscopic surgeries in our hospital, 10 of them developed postoperative complications.Results The complications included 7 cases of gastric mucosa rupture during pyloric resection,1 case of delayed rupture of the pylorus,1 case of intestinal malrotation complicated with duodenal stenosis,and 1 case of incisional hernia.The former 9 cases were cured by open surgery,and the last one recovered spontaneously in 4 months. Conclusions Mucosarupture caused by pyloric resection is the most common complication after laparoscopic surgery in neonates and infants,open surgery should be performed in such a situation.Delayed rupture of the bowel after laparoscopic surgery can be potentially fatal,and should be treated as soon as possible.Intestinal malrotation may lead to a high rate of malformation,which can be avoided by early diagnosis and treatment.

In order to explore the effects of printing and dyeing wastewater untreated and treated by bacterial biotechnological method on the specific immune response of Carassius auratus, the tested fish were preimmunized intraperitoneally with Aeromonas hydrophila vaccine then were separately placed into control clean water,untreated printing and dyeing wastewater (dilution ratio 13%,pH=7) and treated water 5 fish of every group were killed on the day 2,4,6,8,10,14,18,25,35 th to detect their immune indexes The results indicated that total leucocytic numbers of blood and serum lysozyme level in fish of clean water and treated water increased rapidly and reached their peaks on the day 8th and 6th respectively after vaccination,then reduced to baseline and maintatined for a period of time Leucocytic numbers in fish in untreated wastewater group decreased on day 2nd then increased gradully to normal,serum lysozyme level in this group had decreasing tendency and was lower than the other 2 groups from beginning to end However titer of anti A hydrophila antibody in serum of untreated water group was only lower than that of treated water group on the day 6th when it appeared After this antibody titers of these 3 groups had no significant defference It indicated that printing and dyeing wastewater inhibited immune response of Carassius auratus ,but water treated by bacterial biotechnological method had no this kind of toxic effect

The special nature of medical care determines the high riskiness of the medical profession that is lacking in other professions. In view of the high-techness and high riskiness of the medical profession, it is only proper to start thinking about setting up corresponding mechanisms for guarding against and dissolving the risks so as to safeguard the legitimate rights of the doctors. Guarding against and dissolving risks of the medical profession fall into a systematic framework of regulations and legal arrangements that are composed of mechanisms for dispersing risks of the medical profession, mechanisms for sharing medical liabilities and systems of medical care and social security.

Objective To study the correlation between the mutation in platelet activating factor (PAF) acetylhydrolase gene mutation(Val279 Phe)and cerebral vascular disease (CVD)in Chinese.Methods Genomic DNA was analysed for the mutation allele in 153 patients with cerebral vascular disease and 100 healthy subjects matched for age and sex without CVD by a specific polymerase-chain reaction. Plasma PAF acetylhydrolase activity was determined by the method of Stafforini et al.Results The prevalence of the mutation and the frequency of the mutation allele are significantly higher in patient with CVD than those in control subjects( P

OBJECTIVE:To evaluate the effectiveness and security of Yishen huashi granules in the adjuvant treatment of chronic nephritis systematically,and to provide evidenced-based reference. METHODS:Retrieved from CBM,CJFD,Wanfang database,VIP,Medline,PubMed,EMBase and Cochrane library,randomized controlled trials(RCTs)about Yishen huashi gran-ules in the treatment of chronic nephritis were collected and related magazines were retrieved by hand. After selection and data ex-traction by 2 researchers independently,the quality of included literature was evaluated according to Jadad rating scale,and Me-ta-analysis was conducted by using Rev Man 5.3.5 software. RESULTS:A total of 8 RCTs were included,involving 1028 patients. Total response rate of trial group [RR=1.33,95%CI(1.24,1.42),P<0.001] was significantly higher than that of control group. 24 h urine protein quantity [MD=-0.32,95%CI(-0.40,-0.24),P<0.001],serum creatinine [MD=-22.38,95%CI(-23.37,-21.39),P<0.001],blood urea nitrogen [MD=-1.45,95%CI(-2.05,-0.84),P<0.001] were significantly lower than control group,with statistical significance. CONCLUSIONS:Based on routine treatment,Yishen huashi granules have good therapeutic ef-ficacy for chronic nephritis,can reduce 24 h urine protein and improve renal function.

A postulated suppression of T lymphocyte function by clonidine (an adrenogic receptor agonist) was explored by utilizing mitogen induced lymphocyte transformation of mouse spleen cells in vitro. Added at the onset of the culture or 24h later, clonidine (10-(?)-10-8 M ) did not suppress T lymphocyte transformation induced by ConA or PHA. It implies that there is a difference in the sensitivity for clonidine between T and B lymphocyte, as clonidine has been suggested to suppress the SRBC induced primary immune response of mouse spleen cells in a dose dependent manner.