Objective To explore the home-made U-shaped retractor ’ s effect on reducing the traction injury of recurrent laryngeal nerve in the video-assistance thyroidectomy . Methods The patients with unilateral and unifocal papillary thyroid microcarcinoma , which were diagnosed by ultrasound preparation and by pathological postoperation , were enrolled .They all underwent the ipdilateral lobectomy , isthmus resection and the clearance of central lymph nodes with video-assistance technology .From January 2013 to June 2014, 79 cases ( control group ) were received conventional method , by which the thyroid lobe was elevated onto the trachea surface.From January 2015 to March 2016, 71 cases (U-shaped group) accepted the procedure which adopted home-made U-shaped retractor to pull the thyroid lobe to carotid artery horizontally .The operations were completed by the same surgeon .There were no significant differences between the two groups in age , gender and lesion size , which is comparable .The incidence rate of hoarseness was compared postoperation . Results Postoperative hoarseness of the U-shaped group occurred in 6 cases (8.5%) and the control group in 17 cases (21.5%), which show a significantly statistical difference (χ2 =4.919, P=0.027).And there was no significant difference in voice recovery time [median:16.5 d (8-31 d) vs.18 d (4-50 d), Z=-0.246, P=0.806]. Conclusion In the video-assisted thyroidectomy , using the U-shaped retractor to pull the thyroid lobe laterally and horizontally will be beneficial to reduce the recurrent laryngeal nerve tension and the incidence of the retract injury .

Objective To investigate the feasibility and safety of minimally-invasive video-assisted parathyroidectomy ( MIVAP) for parathyroid adenoma ( PA) . Methods Clinical data of 14 patients with primary hyperparathyroidism ( PHPT) caused by PA between April 2011 and September 2014 in our hospital were analyzed retrospectively.Coexistent thyroid lesions were found in 6 patients.With preoperative definite diagnosis and localization, we performed parathyroidectomy and local excision or lobectomy of the thyroid gland.All the patients were confirmed by intra-operative fast frozen section pathological examination and postoperative pathological immunohistochemistry.Intra-and post-operative parathyroid hormone monitoring was conducted.Hoarseness, choking cough, and active bleeding were observed. Results All the procedures were accomplished successfully, without intra-operative abnormal blood loss or conversion to conventional operation.The operative time was 35-60 min ( mean, 50 min);the intra-operative blood loss was 1.7-32.0 g (mean, 9.75 g).Neither transient nor everlasting injury to recurrent laryngeal nerve or superior laryngeal nerve happened.No hemorrhage was observed.All the patients were followed up for 2-43 months ( mean, 16 months) , during which there was no recurrence. Conclusion MIVAP with thyroidectomy is feasible and safe for PA and coexistent benign thyroid lesions, on the basis of pre-operative adequate diagnosis and proper localization and intra-operative parathyroid hormone monitoring.

Objective To investigate the feasibility and safety of three-dimensional video-assisted thyroidectomy (3D VAT). Methods During January to April of 2014, 10 cases with unilateral or bilateral thyroid benign diseases , thyroid cancer, or parathyroid lesions were enrolled .The 3D VAT was carried out by using a 10-mm 3D stereoscopic endoscope .Local excision or lobectomy was performed via a 2-4 cm curve skin incision one finger above the sternal notch .In two patients , lobotomy combined with systematic lymphadenectomy was performed when papillary thyroid microcarcinoma was identified during operation . Results All the procedures were accomplished successfully under 3D video-assisted system, without intra-operative abnormal blood loss or conversion to conventional thyroidectomy .The operative time was 30-90 min (61.8 ±22.4 min);the intra-operative blood loss was 1.3-93.0 g (median, 5.2 g).All the patients were followed up for 1-4 months.Neither intra-nor post-operative complications about recurrent laryngeal nerve , superior laryngeal nerve , or parathyroid were observed . Conclusions Preliminary impression emerging from this study seems to suggest that 3D VAT is safe and effective.Compared with 2D surgery, a good perception of depth and easy recognition of anatomic structures are noticeable .

Objective To explore the safety and feasibility of endoscopic-assisted inguinal lymphadenectomy via a small incision (3 cm) for vulvar carcinoma . Methods From September 2013 to December 2015, local wide excision and endoscopic-assisted inguinal lymphadenectomy via a 3-cm incision was performed to treat vulvar carcinoma in 6 women.There were 2 cases of unilateral operation and 4 cases of bilateral operations .A small incision (3 cm) was made in the groin.The skin edge was lifted to separate subcutaneous tissue and obtain a surgical exposure .Then endoscopic inguinal lymphadenectomy was conducted . Results The surgeries were successful in all the 6 patients, with no conversion to open surgery or intraoperative secondary injury .The operation time of inguinal lymphadenectomy was 60-90 min (78.3 ±14.7 min), and the blood loss was 20-40 ml (31.6 ±9.8 ml).The number of lymph nodes desected was 3-13 (8.7 ±3.0) in each side.Pathological examinations showed squamous cell carcinoma . The FIGO staging showed 2 cases of stage ⅠB and 4 cases of stage Ⅱ.The postoperative stitches removal time was 7-9 d (7.8 ±0.7 d) .No surgical complications , such as incision disruption , delayed healing , inguinal skin necrosis , or lower extremity lymphedema , were recorded during a 3-12 months (6.5 ±4.4 months) of follow-up.No tumor recurrence or metastasis was found . Conclusions Endoscopic-assisted inguinal lymphadenectomy via mall incision in the treatment of vulvar carcinoma is effect , safe and feasible .It achieves radical effects .

Objective To investigate the expression of nm23-H1 in human benign and malignant colorectal lesions and the relationship between invasion,metastasis in colorectal carcinoma.Methods The expression of nm23-H1 were determined by ABC immunohistochemical technique in 80 cases human colorectal carcinoma,and compared with that in adenoma and normal mucus.Result Positivity expression rates of nm23-H1 were 66.7% in colorectal carcinoma.No significant difference of the expression of nm23-H1 in normal mucus,adenoma and cancerous tissue (P>0.05).The positive rates of nm23-H1 expression in different pathological grading,lymph node metastasis and post-operative survival (3 years) were showed significant difference (P<0.05).Conclusions It is suggested that the deletion of nm23-H1 low expression might play an important role in the carcinogenesis,development,metastasis and prognostic value of human colorectal carcinoma.

OBJECTIVEThis study aimed to evaluate the biological characteristics of a human specifically targeted antimi- crobial peptide C16LL-37 against Streptococcus mutans (S. mutans).

METHODSIn this study, an antimicrobial peptide LL-37, a peptide derived from CSP(C16) (S. mutans competence stimulating peptide), and recombinant peptide C16LL-37 were synthesized by Fmoc-chemistry-based strategy. The selectivity and antibacterial activity of C16LL-37 were identified by the colony counting method on microbial culture plates. After treatment of C16LL-37 at 32 µmol · L⁻¹, the morphological changes in S. mutans were observed by using scanning electron microscopy (SEM). In addition, enzyme-linked immunosorbent assay was used to evaluate the hemolytic activity and antibacterial activity of C16LL-37 under different conditions.

RESULTS1) The minimum inhibitory concentration of C16LL-37 was 16 µmol · L⁻¹, and the minimum bactericidal concentration was 64 μmol ·L⁻¹. 2) The survival rate of S. mutans was 3.46% after C16LL-37 treatment at 64 µmo-L⁻¹ for 30 min, whereas it was 0% at 64 µmol · L⁻¹ for 60 min. The survival rates of four other kinds of bacteria were more than 60% at any time (P < 0.05). 3) The morphological change in S. mutans was observed after C16LL-37 treatment at 32 µmol · L⁻¹ by using SEM. S. mutans presented an irregular shape, rough surface, and evident splitting. 4) The hemolysis rate of C16LL-37 (≤ 64 µmol · L⁻¹) was less than 0.33%. 5) This study showed no significant in- fluence on the antibacterial activity of C16LL-37 under different conditions, such as temperature, pH, salinity, and trypsin at low concentration (P > 0.05).

CONCLUSIONC16LL-37 exhibited obvious specificity for S. mutans, strong antibacterial activity, low toxicity, and high stability. Thus, C16LL-37 has good potential in caries research and clinical application.

Anti-Infective Agents ; pharmacology ; Antimicrobial Cationic Peptides ; pharmacology ; Bacterial Proteins ; Dental Caries ; Enzyme-Linked Immunosorbent Assay ; Humans ; Microbial Sensitivity Tests ; Microscopy, Electron, Scanning ; Peptides ; Streptococcus mutans ; drug effects

AIM: To study the basic mechanism of transcriptional regulation, NKX3.1 gene promoter was cloned and its promoter activities in prostate cancer cell lines and other cancer cell lines were tested. METHODS: 1.04 kb - promoter fragment of NKX3. 1 gene was obtained by PCR and cloned into pGL3 - basic and pEGFP - 1 that are promoter - less reporter vectors to examine its promoter activity driving the reporter gene transcription. The promoter activity was determined by dual -luciferase reporter assay and the expression of GFP reporter observed under fluorescence micro scope. RESULTS: The sequence of the cloned 1.04 kb promoter proved to be correct by DNA sequencing. The dual - lu ciferase reporter assay (M1/M2) showed that the promoter activity in LNCaP cell transfected with pGL3 - 1.04 kb promoter was about 1.5 - fold higher than that of pGL3 - control transfection and 50 - fold higher than that of pGL3 - basic transfec tion. To investigate the 1.04 kb - promoter activity in different tumor cell lines, the constructed pGL3 - 1.04 kb promoter and pEGFP - 1.04 kb promoter were transfected into several cell lines, respectively. The results showed that the activity of 1.04 kb promoterin LNCaP was highest among the tested cell lines. Multiple consensus sequence elements have been iden tified within the 1.04 kb fragment using TRANSFAC database. Further experiments will be done to determine their founc tions. CONCLUSION: Cloned 1.04 kb fragment upstream of NKX3.1 gene presented a strong promoter activity and its activity was highest in LNCaP cell among the tested tumor cell lines.

AIM: To observe the effect of exogenous androgen responsive element decoy on the promoter of prostate specific antigen (PSA) and the growth of LNCaP cells for searching the possibility of gene therapy for prostate cancer. METHODS: Firstly, pGL3 - PSA luciferase expression vector containing 640bp - promoter fragment of PSA gene was constructed. Then, a 23 -mer phosphorothioated ARE decoy based on the deduced ARE sequence at the promoter region of PSA gene was synthesized. pGL3 - PSA and ARE decoy DNA were cotransfected into PC3 - M cell by lipofectamineTM 2000. Through detecting the activity of luciferase, the effect of ARE decoy on the promoter of PSA was studied. Then the ARE decoy DNA was transfected into LNCaP cells. The effect of decoy DNA on the proliferation of LNCaP cells was examined by using MTT assay. The effects of apoptosis were detected by phase contrast microscopy, DNA agrose gel electrophoresis and flow cytometry. Meanwhile, the nuclear extract was prepared from LNCaP cells and DNA - protein interactions were examined by electrophoretic mobility shift assay (EMSA). RESULTS: The reporter assay showed that the aetivity of luciferase was significantly reduced in the ARE decoy - transfected cells, bnt not in the cells transfected with the control decoy. EMSA demonstrated specific binding of the ARE decoy to androgen receptor. The growth of LNCaP was remarkably inhibited and apoptotic morphological changes as well as DNA fragmentation were observed in the ARE decoy- transfected cells. The rate of apoptosis was 22.4% detected by FCM. CONCLUSION: The ARE decoy is capable of inhibiting the promoter of PSA gene and inducing the apoptosis in prostate cancer cells. It may become a potential therapeutic tool for prostate cancers.

Objective To investigate the diagnosis and treatment of septic shock and multiple organ dysfunction syndrome (MODS) following transrectal ultrasound-guided prostate biopsy (TRUSPB). Methods We reported two cases,45 and 46 years old,of septic shock and MODS after TRUSPB from June 1996 to May 2011.10 cases like these two cases in literatures were acquired (3 cases in Chinese and 7 cases in English) from 1991 to 2011,and the causes of severe infections following transrectal prostate biopsy and its prophylactic procedures were discussed as well. Results The two cases,suffered postoperative septic shock and MODS 16 -40 h after being smoothly performed TRUSPB.One patient died four days after surgery and the other improved after five days antibiotic treatment.All the 12 cases had abrupt onsets and deteriorated rapidly,2 cases died and 1 case was performed amputation due to double lower limb gangrene,resulted in high mortality and morbidity.There are many risk factors,such as repeated puncture (4/12),diabetes (3/12),chronic infections (3/12) and used immune suppression (1/12),et al; blood culture was positive in 9 case and E.coli bacteria was the main bacteria(8/9),besides,half of them were multi-drug resistant (4/8) and other 2 cases were ESBLs ( + ) or 1 case was quinolone-resistant repectively.9 cases recovered after actively controlled infection using carbapenem and other treatment. Conclusions Transrectal ultrasound-guided prostate biopsy could cause serious complications such as septic shock,to which more attentions should be paid.Preoperative use of carbapenem should be recommended for patients with repeating biopsy or other risk factors.

Objective To investigate the effect of ambroxol pretreatment on the inflammatory response and lipid peroxidation during one-lung ventilation (OLV) .Methods Forty-five ASA I or II patients aged 37-64 yr weighing 53-65 kg undergoing thoracotomy under general anesthesia were randomly divided into 3 groups ( n = 15 each): group A two-lung ventilation (TLV); group B OLV and group C ambroxol 1 mg/kg + OLV. Anesthesia was induced with midazolam, fentanyl, propofol and atracurium and maintained with propofol infusion and intermittent iv boluses of fentanyl and atracurium. The patients were mechanically ventilated (VT8-10 ml/kg, RR 12 bpm during TLV, VT 6-7 ml/kg, RR 16 bpm during OLV, I: E 1:2, FiO2 100% ). In group C ambroxol 1 mg/kg in normal saline ( NS) 100 ml was infused at 25 min before OLV (infusion rate 4 ml/min) , while in group A and B equal volume of NS was infused instead of ambroxol. Blood samples were obtained from radial artery before induction of anesthesia and OLV (T0.1 ) and at 0.5, 1, 2 h of OLV (T2-4 ) and 1, 2 h of TLV (T5,6 ) and at 24 h after operation (T7) in group B and C for determination of serum SOD activity and TNF-α, IL-6 and IL-8 concentrations and WBC and neutrophil granulocyte counts. The same indexes were detected in group A at the corresponding time points.Results Serum SOD activity was significantly lower and serum TNF-α, IL-6 and IL-8 concentrations and WBC and neutrophil granulocyte counts were significantly higher in group B than in group A. Serum SOD activity was significantly higher and serum TNF-a, IL-6 and IL-8 concentrations and WBC and neutrophil granulocyte counts were significantly lower in group C than in group B. Conclusion Pretreatment with ambroxol 1 mg/kg can inhibit inflammatory response and lipid peroxidation during OLV.