Based on the requirement of biology education development,the article analyzes the approach to improve the teaching quality of medical biology from quality education,subjiect intercrossing or 'regression' and 'outspread',and offers new ideas for education reform and innovation of the medical biology.

Objective To study the feasibility of transperitoneal laparoscopic radical prostatectomy. Methods Laparoscopic radical prostatectomy was performed according to Montsouris technique. Results All the operations were successfully completed. The operating time was 330~540 min (mean, 433 min) and the estimated blood loss was 100~550 ml (mean, 274 ml). No patients required a blood transfusion. Bladder injury was found in 1 patient and was sutured promptly during the operation. The postoperative hospital stay was 15~23 days (mean, 17 days). The catheterization time was 14~23 days (mean, 16 days). In 2 patients presenting with urinary leakage, the catheter was removed at 20 and 23 days after surgery respectively, while in the remaining 8 patients, at 2 weeks after operation. Mild urinary incontinence occurred in 3 patients and disappeared after 4 weeks of supportive treatment. Pathological examinations revealed stage pT_ 1c) in 3 patients, stage pT_2 in 6, and stage pT_3 in 1. A follow-up for 3~21 months (mean, 7.5 months) was carried out. The postoperative prostate-specific antigen (PSA) level was 0~2.70 ?g/L(mean,0.05 ?g/L). Two patients returned a normal sexual function. Conclusions Strict following surgical indications, adequate preoperative preparation, improvement of surgical techniques, and proper application of surgical instruments and devices make transperitoneal laparoscopic radical prostatectomy feasible.

Objective To explore the role of CD4+CD25+CD127low/-regulatory T cells (Tregs) in the pathogenesis of psoriasis vulgaris(PV). Methods Flow cytometry analysis was used to detect the amount of Tregs in peripheral blood and ELISA to test the levels of IL-10 and TGF-β1 in blood serum; the suppressive function of Tregs on autologous CD4+CD25-T cells was determined by MTT method. Results No significant difference was found in the proportion of Tregs in PV patients and healthy controls(P>0.05). There was a diminished suppression of Tregs from patients on autologous CD4+CD25- responder T cell proliferation in PV patients when compared with that in controls (P < 0.01). The serum level of IL-10 in patients was lower than that in controls (P < 0.01) while that of TGF-β1 in PV patients was significantly higher than that in controls(P < 0.01). Conclusion Abnormal function of Tregs and low secretion of IL-10 in PV patients might be related to the pathogenesis of psoriasis.

Objective To investigate the clinical outcome of post-traumatic tibial osteomyelitis treated by induced membrane technique combined with the antibiotic cement-coated locking plate.Methods A restrospective case series analysis was made on 71 cases of post-traumatic tibial osteomyelitis treated by induced membrane technique from September 2014 to September 2014.There were 55 males and 16 females, aged 18-60 years(mean, 37.4 years).Mean length of bone defect following debridement was 4.5 cm(range, 4-11 cm).Antibiotic cement-coated locking plates were used to provide the stability of the bone defects after one-stage debridement.Bone grafting and exchanging the plates with ntramedullary nails were done during the second-stage surgery.Parameters were monitored dynamically after operation to evaluate infection recurrence and bone healing, including C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), clinical features(sinus formation, redness and swelling, warmth and pain) and X-ray films of the involved limbs.Results All patients were followed up for 13-25 months (mean, 19.5 months).There was no sign of recurring infection and CRP and ESR were normal in all cases after the first stage surgery.However, four cases (6%) had recurrent infection with sinus exudates and their CRP and ESR were abnormal after the second stage surgery, and further treatments were carried out on these patients.Follow-up showed bony union in all patients within mean 5.5 months (range, 4-6 months).Conclusion Induced membrane technique with antibiotic cement-coated locking plates for treatment of post-traumatic tibial osteomyelitis can shorten bone healing time and decrease infection recurrent rate without obvious impact on osteogenic activity.

Objective: To explore the effect of suberoylanilide hydroxamic acid (SAHA) improving cardiac hypertrophy via inhibiting histone deacetylases (HDAC) in experimental mice and to provide a new idea for prevention and treatment of cardiac hypertrophy. Methods: Cardiac hypertrophy mice model was established by thoracic aorta ligation. A total of 60 Kunming mice were randomly divided into 4 groups: Normal control group, Sham operation group, Cardiac hypertrophy (CH) group and CH+SAHA group. There were 6 mice used in each group. Myocardial cell morphology was observed by HE staining, cardiac function was assessed by echocardiography, mRNA and protein expressions of HDAC5 (the isoform of HDAC) and β-MHC were examined by RT-PCR and Western blot analysis. Results: The mice in CH group had myocardial cell hypertrophy, disordered arrangement and hyperchromatic nucleus. Compared with Sham operation group, CH group showed decreased left ventricular end diastolic diameter (LVEDD), left ventricular end diastolic volume (LVEDV) and increased thickness of inter-ventricular septum (IVS), allP<0.05; CH group presented elevated mRNA and protein expressions of HDAC5 and β-MHC,P<0.05. SAHA obviously decreased HDAC5 expression, down regulated cardiac hypertrophy related β-MHC gene expression, improved cardiac function and hypertrophy, all P<0.05. Conclusion: HDAC were involved in myocardial hypertrophy; SAHA could inhibit HDAC expression and therefore,improved myocardial hypertrophy in experimental mice.

Hexanes ; adverse effects ; Humans ; Occupational Injuries ; chemically induced ; Pyrroles ; adverse effects ; Trauma, Nervous System ; chemically induced

Objective To investigate the results of Cierny-Mader type Ⅳ posttraumatic long bone infection treated by en bloc resection combined with induced membrane technique.Methods A retrospective case series analysis was made on 36 patients with posttraumatic long bone infection treated by en bloc resection combined with induced membrane technique from January 2013 to January 2015.There were 30 male and 6 female patients between 21 and 68 years (mean,41 years).Infection control,bone union,function activity and complications were detected after operation.Results After debridement in the first stage,a segmental bone defect of 5.5 cm in length (range,2-10.9 cm) was seen in all patients.Seven patients needed a local flap transfer to cover the wound and five patients had a second debridement.Mean duration of systemic antibiotic use was 2 weeks (range,1-6 weeks) and mean time interval of second-stage bone grafting was 12 weeks after debridement (range,6-36 weeks).Mean follow-up was 29.5 months (range,24-45 months).One patient had recurrence and was cured with radical debridement and a permanent acrylic spacers insertion,with the cure rate of bone infection of 97％ (35/36).All patients achieved bone union with a mean duration of 5.9 months (range,4-8 months),and were able to walk independently.Thirty patients returned to work or pre-operative physical labor.No pain and re-fracture occurred.Six patients had adjacent joint stiffness.Conclusion En bloc resection combined with induced membrane technique is associated with radical debridement,decreased recurrence rate and limb salvage,indicating a simple and effective method for Cierny-Mader type Ⅳ posttraumatic long bone infection.

Objective To investigate the effect of body mass index (BMI) on laparoscopy and the open radical prostatectomy.Methods A retrospective analysis of 226 cases of radical prostatectomy from 2012 January to 2013 May was performed.106 patients underwent laparoscopic surgery,with aged 66.5±0.7,height (167.7±0.5) cm,weight (66.8±0.9) kg; 120 patients underwent open surgery,with aged (65.8±0.7) year,height (168.1±0.5) cm,weight (66.5±0.8) kg.Non-obese (BMI ＜25 kg/m2) and obese (BMI ≥ 25 kg/m2) were divided in each group.The preoperative serum PSA level,the operation time,the blood loss during operation,the preoperative and postoperative hemoglobin,Gleason score,and the postoperative indwelling catheter time were compared between non-obese group and obese group.In the laparoscopic surgery group including 76 non-obese cases (71.7％) and 30 obese cases (28.3％),no difference showed in PSA values and age before operation between the two sub-groups.In the open surgery group,including 84 non-obese cases (70.0％) and 36 obese cases (30.0％),no statistical difference of preoperative PSA values and age showed in the two sub-groups.Results In the laparoscopic group,the operation time is (nonobese 169.4±37.8 min and obese 188.5±42.3 min),and the blood Hb decrease(non-obese-22.8± 11.0g/L,obese-30.9±15.9 g/L) and the blood loss(non-obese 115.9±68.9 ml,obese 178.3±126.4 ml)showed significant difference in the two sub-groups (P＜0.05).The two sub-groups showed no statisticaldifference in postoperative indwelling catheter time and Gleason score (P＞0.05).In the open surgery group,the intraoperative hemorrhage (non-obese 413.7±289.4 ml,obese 594.4-±534.9 ml) and the hemoglobin decrease (non-obese-27.2± 13.3 g/L,obese-34.9± 15.8 g/L) showed significant difference (P＜0.05).The two sub-groups showed no significant difference in the preoperative hemoglobin,postoperative indwelling catheter time,Gleason score and operation time (P＞0.05).Conclusions For the patients who underwent prostatectomy,no matter by laparoscopic or open surgery,the blood loss was greater in obese subgroup than non-obese subgroup,and the operation time was much longer in obese group than non-obese group.

Objective To evaluate 18F-fluorodeoxyglucose (FDG) PET/CT in detecting occult malignancy in patients with suspected paraneoplastic neurological syndrome (PNS).Methods Twenty consecutive patients who underwent PET/CT scanning with the indication of suspected PNS were retrospectively reviewed.The gold standard of PNS was either cytology or clinical follow-up, and the final diagnosis was compared with PET/CT findings.Results Of the 20 patients, six were PNS.PET/CT detected nine cases.Six were true positive and three were false positive.The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of PET/CT were 100% (6/6), 78.57% (11/14), 85.00% (17/20),66.7% (6/9) and 100.00% ( 11/11 ) respectively.The treatment plan was modified based on the PET/CT results in 4 patients.Conclusions 18F-FDG PET/CT may play a role in detecting the underlying malignancy of PNS.It is also valuable in staging of the malignancy thus providing information for therapy decision making.

Objective To analyze the clinical features of patients with prostate adenocarcinoma under 50 years.Methods Between January 2008 and April 2014,we reviewed 21 cases with prostate cancer under 50 years old.The mean age in those patients was 48 years old (ranged 42-49 years old).Their tPSA level was elevated,including＞10 μg/L in 17 cases,4-10 μg/L in 4 cases.21 cases were all confirmed by pathology.The results Gleason score showed 6 scores in 3 cases,7 scores in 6 cases (3+4 scores in 5 cases and 4+3 scores in one case),8 scores in 7 cases and 9 scores in 5 cases.In the study,clinical stage was for T2N0M0 in 16 cases,T3N0M0 in 1 case,T4NxM0 in 1 case and T3-4N1M1 in 3 cases.The treatments were hormonal therapy was chosen in 5 cases and radical prostatectomy was performed in 16 cases,including 16 cases with T2N0M0 stage and one case with T3N0M0.Results In those patients who accepted the radical prostatectomy,the duration of follow-up ranged from 3 to 65 months (mean 23 months).During the follow-up,14 patients had a lower incidence of biochemical recurrence.1 patient (T2,PSA 82.8 μg/L,GS 9) had external beam radiotherapy one month after the radical prostatectomy because of tumor invasion into the prostatic capsule.Then his PSA level returned to the 0.2 μg/L.1 patient (T3,PSA 38.9 μg/L,GS 8) had external beam radiotherapy 18 months after the radical prostatectomy because of biochemical recurrence and the tPSA level returned to the 4.0 μg/L.All patients who underwent radical prostatectomy had favourable recovery of urinary continence.In 5 patients who had androgen deprivation therapy,2 patients died after 63 or 65 months and one patient was lost to follow-up.The PSA level in one patient decreased from 71.8 μg/L to 2 μg/L after four months treatment.One patient had castration resistant prostate cancer and the adjuvant external beam radiotherapy was considered,subsequently.Conclusions Men under the 50 years old,who are diagnosed with localised prostate cancer,usually demonstrated the early clinic stage and high Gleason scores.It should not be discouraged from RP.Young men with metastatic prostate cancer have a poor prognosis.