Objective To investigate the change of S-100B in serum in rats at varions times after exposure to different whole-brain irradiation doses and to explore the characteristics of the S-100B change in early radiation-induced brain injuries. Methods A model of brain radlation-induced injuries was estabhshed in the rat after whole-brain irradiation with a single dose of 2, 10, or 30 Gy of 4 MeV electron. The concentration of S-100B in serum was detected by means of enzyme-linked immunoserbent assay (ELISA) at different time points (1,6,12,24,3 days, 1 week, 1 month) after exposure. Results In terms of measuring time points, the serum concentration in all groups reached the fwst peak 6 hours after irradiation, declined after 12 hours, rose again after 24 hours, and started to decline again until the last time point (1 month), with the exception of the 2 Gy group, which reached the second peak at 3 days after irradiation. Conclusions The S-100B serum concentration was changed in the rats after whale-brain irradiation and these changes are positively related to the irradiation amount. It seems that the higher the dose, the higher the serum concentration and the differences between the dose groups are significant (via multiple regression models). The S-100B may be a valuable serum marker for the brain irradiation injury.

The value of surgery in the diabetes mellitus treatment receives much attention in the medical field,however,Chinese metabolic surgeons adopt the surgical experience from surgeries for morbid obesity in western countries.There are many controversies on the operative indication,operation method and postoperative follow-up of surgery for diabetes mellitus with low body mass index (BMI).Our nation has a large number of patients with diabetes mellitus and low BMI,in which uncheckedoperative indication,unstandard operation method and non-systematic follow-up are common problems.It has profound significance to investigate operative indication,operation method and efficacy evaluation for patients with diabetes mellitus and low BMI.

Despite the progress in the comprehensive management of colorectal cancer,locally advanced (T3 and T4 stages) and metastatic colorectal cancer is still a challenging problem.Although researches on neoadjuvant therapy and targeted therapy have obtained many encouraging results,many unanswered questions still remain.These include the indication of multivisceral resection for locally advanced colorectal cancer,the optimal management of patients with hepatic and (or) pulmonary metastasis.R0 resection was the first choice for the treatment of metastatic colorectal cancer,but it is only suitable for selected patients.Chemotherapy and targeted therapy are effective in converting some unresectable liver metastasis into resectable disease.This review focuses on recent improvements in the management of locally advanced colorectal cancer,as well as the management of hepatic and (or) pulmonary metastasis.

Objective To assess the efficacy of submucosal injection of thiotepa for the prevention of recurrence of superficial bladder cancer. Methods Sixty-six patients with superficial bladder cancer were chosen, they were randomly divided into injection group(33 cases)and control group(33 cases). In injection group, 33 patients had submucosal injection of thiotepa, after 30 minutes resection of bladder tumor were treated by PKRBt, after one week, they were given perfusion 27 mg BCG. In control group, 33 patients after the PKRBt were given perfusion BCG. Results The recurrence rate in injection group was 15.2%, and that of the control group was 27.3%. There was significant difference between the twO group (P<0.05). Con-clusions The submucosal injection of thiotepa , PKRBt and perfusion BCG could prevent tumor recur-rence,it has the following advantage,such as simple , safe, less side effect ,more economical. The submu-cosal injection is a practical method to prevent tumor recurrence and is worth popularizing.

Eighty elderly patients undergoing elective resection for the prostate were randomly divided into two groups, the levobupivacaine (observe group) and bupivacaine (control group) were used for spinal anesthesia, respectively. The level of sensory block and maintain time were T7±4 and (224 ±28) min in observed group, those in control group were T6±3 and (227 ±30) min, respectively ( both P＞ 0. 05). The mean arterial blood pressure of control group was (71 ±8) -(72 ±8) mm Hg (1 mm Hg = 0. 133 kPa) from 5 to 30 min after injection; meanwhile that of observed group was(75 ± 9) mm Hg (P ＜ 0. 05). The incidences of hypotension and nausea were 10% (4/40) and 0% (0/40) respectively in observe group, and those were 30% (12/40) and 15% (6/40) respectively in control group (both P＜0.05). The results indicate that levobupivacaine and bupivacaine have similar anesthetic effects, but levobupivacaine has fewer side effects and is more suitable for elderly patients.

AIM: The purpose of this study was to investigate the effects of rhBMP-2/collagen composite on bone regeneration during expansion of the interparietal suture in the rats. METHODS: 32 10-week old SD rats were divided into groups consisting of 8 rats each. They were comprised of normal control group, expansion control group and the treatment group, the two treatment groups were covered with atelo-typeⅠcollagen and rhBMP-2/collagen composite on the suture before subjected to the expansion force. The bone regeneration in the interparietal suture was estimated by histological method, the osteocalcin content was measured by radioimmonoassay and the calcium content was determined by atomic absorption spectrophotometer. RESULTS: The bone regeneration was more active in the suture after giving an expanding force than in the suture without any intervention. Even bone bridge was formed in the rhBMP-2/collagen composite group. Both the osteocalcin content and calcium content were much higher in the rhBMP-2/collagen composite group than in other three groups (P

Objective To study the clinical significance and changes of serum TNF-α、IL-6、IL-8、PAFand AGT-Ⅱ in patients with severe acute pancreatitis(SAP). Methods Serum TNF-α、IL-6、IL-8、PAF、AGT-Ⅱ values of all patients were measured by ELISA and radioimmunoassay. 30 cases with mild AP(MAP group),50 cases with SAP(SAP group) and 30 non-pancreatitis patients as control group. Results The level of TNF-α, IL-6, IL-8, PAF, AGT-Ⅱ of acute phase and recovery phase in SAP group and the MAP group were significantly higher than the normal control group(all P < 0.01); the level of TNF-α、IL-6、IL-8、PAF and AGT-Ⅱ of acute phase in SAP group were significantly higher than the MAP group(all P <0.05); the level of TNF-α、IL-6、IL-8、PAF and AGT-Ⅱ of re-covery phase in SAP group were significantly lower than the acute phase(all P <0.05);the level of TNF-α、IL-6、IL-8、PAF and AGT-Ⅱ of died in SAP group were significantly higher than the survivors (all P < 0.05～0.01). Conclu-sion The level of TNF-α、IL-6、IL-8 with the severity of SAP's condition and prognosis is closely related, The level of AGT-Ⅱ in SAP group were significantly higher than the MAP group.

Three patients with carotid body tumor were treated by surgery in our department from 1994 to 1998. There were 3 females with age from 23 to 40 years old. Among 3 cases, 2 cases were misdiagnosis as neurilemmoma before operation. The size of tumor was 2.5×2.5cm in 1, 3.0×3.0cm in 2. The treatment methods were surgery alone in 2, combined radiotherapy in 1. All patients were cured who had not serious complications. We think that the three symptoms of carotid body tumor are important bases for diagnosis on this disease. However, color B ultrasonography, DSA, CT or MRI also provided informations for useful diagnosis.

Objective To investigate the outcome of microsurgical treatment and its influencing factors in patients with aneurysmal subarachnoid hemorrhage.Methods The consecutive patients with aneurysmal subarachnoid hemorrhage treated with the early or ultra-early microsurgery were enrolled retrospectively.The Glasgow outcome scale (GOS) was used to assess the outcomes of patients at discharge.GOS 4-5 was defined as good outcome,and GOS 1-3 was defined as poor outcome.Results A total of 147 patients with aneurysmal subaraclnoid hemorrhage were enrolled.One hundred and twelve patients (76.2％) had good outcomes.There were significant differences in the proportions of preoperative Glasgow Coma Scale (GCS) scores (12.8 ± 2.8 vs.7.5 ± 3.8;t =7.525,P ＜0.001),low Hunt-Hess grade (83.0％ vs.31.4％;x2 =34.318,P ＜ 0.001),size of aneurysm (x2 =9.531,P =0.009),preoperative rebleeding (6.3％ vs.25.7％;x2 =8.506,P =0.003),preoperative brain herniation (4.5％ vs.40.0％;x2 =26.846,P ＜ 0.001),initial CT scan showing intracerebral hemorrhage (19.6％ vs.48.6％;x2 =11.449,P =0.002),and intraventricular hemorrhage (8.9％ vs.40.0％;x2 =18.846,P ＜0.001) between the good outcome group and the poor outcome group.Multivariate logistic regression analysis showed that the larger aneurysm (odds ratio [OR] 3.194,95％ confidence interval [CI] 1.458-6.999;P =0.004),older age (OR 1.054,95％ CI 1.013-1.097;P=0.010),lower preoperative GCS score (OR 0.539,95％ CI 0.410-0.724;P ＜ 0.001),and preoperative brain herniation (OR 3.633,95％ CI 1.039-12.700;P =0.043) were the independent risk factors for poor outcomes.Conclusions After active surgical treatment,most of the patients with aneurysmal subarachnoid hemorrhage have good outcomes,however,patients with older age,larger aneurysms,lower preoperative GCS scores,and preoperative brain herniation usually have poor outcomes.

BACKGROUND:Interleukin-8 is an important inflammatory chemokine that plays an important role in the regulation of tumor cel proliferation and angiogenesis.
OBJECTIVE:To investigate the effect of interleukin-8 on the invasion and metastasis of CD133+hepatocel ular carcinoma stem cel s.
METHODS:After isolation and culture of MHCC97-H cel lines, CD133+/CD133-MHCC97-H cel s were sorted using immunomagnetic beads. CD133 expression was detected using flow cytometry, and interleukin-8 level in supernatant was measured using ELISA method. Cloning efficiency, tumorigenic capacity, cel migration and invasion ability were detected through colony formation assay, tumorigenesis experiment in nude mice, and Transwel detection. Additional y, other cel s were neutralized using interleukin-8 neutralizing antibody. Measurement results were compared between cel s undergoing different treatments.
RESULTS AND CONCLUSION:The CD133 level, interleukin-8 level, cloning efficiency and cel membrane permeability of CD133+MHCC97-H cel s were significantly higher than those of CD133-MHCC97-H cel s (P<0.05). Transplantation of CD133+MHCC97-H cel s at 1×106/L and 1×107/L resulted in subcutaneous tumors in some mice, whereas no subcutaneous tumors appeared in mice undergoing transplantation of CD133-MHCC97-H cel s at the same concentrations. After interleukin-8 neutralizing antibody treatment, the CD133 level, interleukin-8 level, and cloning efficiency of CD133+/CD133-MHCC97-H cel s were significantly decreased (P<0.05), especial y in the CD133+MHCC97-H cel s (P<0.01);the migration and invasion ability and cel membrane permeability of CD133+MHCC97-H cel s were significantly reduced (P<0.05), but these changes were not obvious in CD133-MHCC97-H cel s (P>0.05). These results show that interleukin-8 could be specifical y involved in the invasion and metastasis of CD133+MHCC97-H cel s.