Electrophysiological studies have shown that the spinosolitary tract-dorsal column postsynaptic (SST-DCPS) neurons may project to both the dorsal column and solitary tract nuclei. In order to demonstrate the neurons morphologically, fluorescein dyes, PI and Bb, were injected into the dorsal column nuclei and the solitary tract nucleus respectively. A total 282 cells were found to be retrogradely labeled in the spinal dorsal horn in 10 adult rats. Of them, 51 (18%) cells were PI-Bb doubly labeled; 120 (43%) were PI labled alone; and 111 (39%) were Bb singly labled. Most of these double-labled cells were concentrated in laminae III-V. The existence of double projection neurons that project to both the dorsal column and solitary tract nuclei, namely the physiologically identified SST-DCPS neurons, is morphologically confirmed in the present study. These neurons may transmit information to both visceral and somatic sensory nuclei, indicating they may play an important role in the convergence of somato-visceral afferents.

Objective To study the effect of methotrexate on the neointimal formation after arterial balloon injury. Methods Male rabbits were randomized into four groups: MTX 0.5 mg/kg per week, MTX 1.5 mg/kg per week, MTX 5 mg/kg per week and the control. Drugs were administered by intramuscular injection. Rabbit carotid arteries were harvested 2 and 4 weeks after injury. Results Histologically, the intimal areas were reduced significantly in MTX treated animals compared with the controls. The VSMC proliferation in injured vessels was identified by immunostaining for proliferating cell nuclear antigen (PCNA). In comparison, PCNA-positive cells in both intima and media were significantly reduced by treatment of MTX. But MTX did not enhance reendothelialization in the injured carotid arteries as determined by Evans blue stain.Conclusion Low dosage of MTX could attenuate neointimal formation after arterial injury by inhibiting VSMC proliferation.

Objective To study the CT features and clinical value of cerebral ischemia infarction. Methods the CT feature of 106 diabetes ischemia infarction were analyzed. Results The patients with is-chemia brain white matter change (35 cases),small area cerebral ischemia infarction (85 cases),great area cerebral ischemia infarction ( 12 cases ),cerebral hemorrhage (6 cases). Conclusions Cerebral ischemia infarction of diabetes mellitus mainly as small area multiple cerebral ischemia infarction,ischemia cerebral white matter lesion located at the area of base ganglion thalamencephalon and cerebellum,termly CT cerebral examination can diagnosis and instruct treatment to the complication of cerebral ischemia apoplexy of type 2 diabetes mellitus.

Pancreatic cancer is a highly malignant tumor and its treatment is still a challenge.Recent studies have shown that medication plays an important role in preoperative and postoperative adjuvant therapy for locally advanced pancreatic cancer and is also a major thera-peutic method for advanced pancreatic cancer.It can improve the survival time and quality of life in patients with pancreatic cancer.Tradi-tional chemotherapy regimens based on gemcitabine and fluorouracil have limited effects in the treatment of advanced pancreatic cancer,and studies on molecular targeted therapies have achieved some progress in recent years.With reference to related guidelines or consensus on the diagnosis and treatment of pancreatic cancer and important clinical trials of the treatment of pancreatic cancer,this article elaborates on the selection and therapeutic effect evaluation of chemotherapy regimens for pancreatic cancer.We believe that with the research and develop-ment of new drugs and the application of new techniques,the treatment of pancreatic cancer will achieve new breakthroughs in future.

Objective To compare the perioperative outcomes and short-term efficacy of three-port extraperitoneal laparoscopic radical prostatectomy (ELRP) and four-port ELRP.Methods Two hundred patients who had undergone ELRP for prostate cancer by a single surgeon from November 2010 to October 2014 were retrospectively analyzed.Among them,95 cases underwent three-port ELRP and 105 cases underwent four-port ELRP.On the basis of traditional four-port ELRP,three-port ELRP was characterized by the omission of the trocar on the inner side of right anterior superior iliac spine.The mean age was 66.8 ± 15.5 years,and mean total prostate specific antigen (tPSA) was 15.3 ± 12.4 μg/L.There were no significant differences including age,body mass index,tPSA,clinical stages,acceptance of neoadjuvant hormone therapy,history of transurethral resection of the prostate,history of diabetes mellitus between the 2 groups (P ＞ 0.05).Patients in three-port ELRP group had significantly smaller prostate volume than fourport group (35.6 ± 16.7 ml versus 42.2 ± 24.7 ml,P ＜ 0.05).The clinical factors as operative time,estimated blood loss,hospital stay,drainage tube keeping days,pathological Gleason scores,pathological stages,positive surgical margin rates,biochemical recurrence rates and urinary incontinence rates were compared between the 2 groups.Results The three-port group had significantly shorter operative time than the four-port group (81.0 ± 18.6 min versus 103.6 ±34.6 min),less estimated blood loss (102.6 ±75.8 ml versus 217.5 ± 182.9 ml),less positive surgical margin rates (13.7％ versus 27.6％).There were 9 patients having Gleason scores more than 7 in the three-port ELRP group and 29 patients in four-port ELRP group (P ＜ 0.05).There were no significant differences of hospital stay,drainage tube keeping days,pathological stages between the 2 groups (P ＞ 0.05).Eighty-three cases in the three-port ELRP group (87.4％) were followed up for 5-19 months with the median time of 11 months.Ninety-two cases in fourport ELRP group (87.6％) were followed up for 17-52 months and the median time was 27 months.There were no significant differences of biochemical recurrence rates and urinary incontinence rates between the 2 groups(P ＞ 0.05).Conclusions Compared to four-port ELRP,three-port ELRP can provide shorter operative time,less blood loss,better negative surgical margin rates,similar oncological control and recovery of postoperative continence.In experienced hands,three-port ELRP could be a feasible and effective option for localized prostate cancer.

Objective To evaluate the learning curve of three-port extraperitoneal laparoscopic radical prostatectomy(ELRP) and to minimize operative time and blood loss about this procedure.Methods From August 2013 to October 2014,the data from 95 consecutive patients,who had undergone three-port ELRP for prostate cancer,were retrospectively analyzed.The mean age was 65.9 ± 7.7 years,mean total PSA level was 15.4 ± 12.7 μg/L,and mean body mass index(BMI) was 24.8 ± 3.2 kg/m2.According to the number of procedures performed by the surgeon,all patients were classified into three chronologic groups,including group A (No.1-32),group B (No.33-64) and group C (No.65-95).There were no significant differences including age,BMI,tPSA,estimated prostate volume,clinical stages,history of neoadjuvant endocrine therapy,history of transurethral resection of the prostate (TURP) among group A,B and C (P ＞ 0.05).The operative outcomes analyzed were operative time,estimated blood loss,hospital stay,drainage tube indwelling days,pathological Gleason scores,pathological stages,positive surgical margin rates,biochemical recurrence rates and urinary incontinence rates.Among these 95 patients,the results of the first 32 cases were compared with those of the remaining 63 cases,the first 64 with the remaining 31.Results The average operative time in 95 patients was 81.0 ± 18.6 min.The sloping learning curve for this surgeon showed that the operative time for all 95 cases was strongly correlated with additional experience (| rs | =0.612,P＜0.01).Operative time,however,was not strongly correlated with the surgeon's experience in each group of A,B and C(P ＞0.05).Group A had longer operative time than that of Group B plus C(96.4 ± 11.3 min vs 73.2 ± 16.7 min,P ＜0.01).Group A plus B had longer operative time than that of group C (87.6 ± 17.2 min vs 67.5 ± 13.8 min,P ＜ 0.01).For all cases,the estimated blood loss was strongly correlated with additional experience (| rs | =0.677,P ＜ 0.01).Estimated blood loss was strongly correlated with the accumulation of experience for the initial 32 cases(| rs | =0.619,P ＜ 0.01).However,no strong correlation was observed over the next 63 cases.Group A had more blood loss than that of Group B plus C (158.7 ± 81.3 ml vs 74.1 ± 54.4 ml,P ＜ 0.01).Group A plus B had more blood loss than that of group C (125.5 ± 71.6 ml vs 55.3 ± 61.6 ml,P ＜ 0.01).But hospital stay,drainage tube keeping days were not strongly correlated with additional experience in each group(P ＞ 0.05).There were no significant correlation between the accumulation of experience and positive surgical margin rates,biochemical recurrence rates and urinary incontinence rates.Conclusion Our experience of three-port ELRP cases appears to be favorable with decreasing tendency in operative time,estimated blood loss with experience accumulation.Exposure to 32 surgeries,operative time and estimated blood loss reduced significantly,and after 64 cases operative time and estimated blood loss further reduced.

Objective To investigate the efficacy of imatinib combining with allogeneic hematopioetic stem cell transplantation or chemotherapy for bcr-abl positive acute lymphoblastic leukemia (ALL). Methods 12 cases were diagnosed on morphology, cytochemistry, immunophenotype and bcr-abl fusion gene. The induction is imatinib (400 mg/d) combining chemotherapy. 8 cases accepted allogeneic hematopoietic stem cell transplantation after complete remission (CR). If bcr-abl became positive, the patient was treated with imatinib (400～600 mg/d). 3 cases were tested with imatinib alternating chemotherapy after cr. Results 11 patients gained CR, CR rate 91.7 %; 5 patients (41.7 %) became bcr-abl negative through 2 courses induction. 3 cases relapsed after transplantation. 2 cases relapsed in imatinib combining chemotherapy group. The median remission interval is 16 months (imatinib combining transplantation group) and 10 months (imatinib combining chemotherapy group) (P <0.01) respectively. The median survival time is 18 months (imatinib combining transplantation group), and the other group (imatinib combining chemotherapy) is 12 months (P <0.01). Conclusion Imatinib combining chemotherapy achieved high CR rate for the bcr-abl positive ALL. Imatinib combining allogeneic hematopoietic stem cell transplantation is superior to imatinib combining chemotherapy for CR patients.

Linoleic acid (C18∶2n-6) and ?-linolenic acid (C18∶3n-3) are found widely in fungi, plants and some lower animals. However, they can not be synthesized in mammals due to lack of △12 and ?-3 fatty acid desaturases. To enable endogenous production of essential fatty acids in mammalian cells, here the stable expression of a Caenorhabditis elegans gene FAT-2 encoding △12 fatty acid desaturase in CHO cells was reported. First, the FAT-2 coding sequence was cloned by RT-PCR. To facilitate high level synthesis of heterogeneous protein, the codon usage of the fatty acid desaturase genes was optimized according to the codon preference of mouse by site-directed mutagenesis, 2 synonymous mutations were introduced into FAT-2 gene by overlapping PCR. The codon-modified gene was finally fused to pBudCE4.1 vector (Invitrogen) under the control of CMV promoter. The expression vector pBudCE-FAT2 was linearized with NheⅠ, and then transfected CHO cells, the cells were under Zeocin selection for nine days and then propagated, then the transfected cells were harvested. The genome and total RNA were isolated for PCR and Norhern blot ananlysis. The results revealed that FAT-2 gene has been integrated into the genome of CHO cells and expressed properly. Fatty acids of total cellular lipids were analyzed by gas chromatography. The results indicate that the expression and function of △-12 fatty acid desaturase resulted in accumulation of linoleic acid. The levels of linoleic acid in transgenic cells were 2.4-fold higher than those in wild-type cells. The moderate linoleic acid in CHO cells was derived from cell culture media uptaken by cell membrane. The results demonstrate that a heterogenous desaturase gene can function well in mammalian cells and prove that transgenic approach is an efficient strategy for changing fatty acid composition of mammals.

This study investigated the mental health status of medical students in China, and analyzed the influencing factors in order to provide evidence for mental health education for medical students. A stratified cluster sampling method was used to recruit medical students from Huazhong University of Science and Technology, China. The questionnaire survey on general information and Symptom Checklist 90 (SCL-90) were used for investigation and analysis. The results showed among the 1137 valid questionnaires, 278 (24.45%) participants had SCL-90 score ≥ 160. The top three mental problems of medical students were obsessive-compulsive disorder, interpersonal sensitivity and depression in terms of the factor score ≥ 2.5 and the number of participants who reflected on the diseases. The third-year medical students had the worst mental health status, and fifth-year medical students had the best mental health status. Students from rural area had more psychological problems than those from urban area; furthermore, students with high professional satisfaction, those who were the single child of the family, non-poor students, and those whose parents had high education level had better mental health status. It was concluded that the mental health of medical students is not optimistic in China. Medical students have some mental health problems of different degrees. Factors that influence the mental health of medical students include academic pressure, professional satisfaction level and family environment.

Inflammation plays an essential role in the pathophysiology of atherosclerosis. Our study was aimed to investigate whether salvianolate, a novel water-soluble phenolic compound of Danshen, alleviates atherosclerosis via regulating the inflammation in rats. High fat diet feeding plus vitamin D3 injection was used to induce atherosclerosis in rats. Salvianolate (60, 120 or 240 mg/kg) or placebo was given to atherosclerotic rats. The plasma lipids, interleukin 6 (IL-6) and C reactive protein (CRP) were measured by ELISA. CD4+CD25+Foxp3+ cells were determined by flow cytometry. Histological changes were examined by hematoxylin and eosin staining. The results showed that the levels of plasma IL-6 and CRP were elevated in the rats fed on high fat diet, and the histological analysis demonstrated the successful establishment of atherosclerosis models. Treatment with salvianolate alleviated the atherosclerotic process and decreased the levels of plasma IL-6 and CRP. Also the number of CD4+CD25+Foxp3+ cells was increased in salvianolate-treated rats. It was concluded that salvianolate could treat atherosclerosis via modulating the inflammation at cytokine and cell levels.