The clinical application of novel chemotherapeutic drugs including oral 5-FU and targeted drugs and preoperatively accurate imaging grading has brought challenges to the indication criteria developed by NCCN and ESMO for neoadjuvant chemoradiotherapy in locally advanced rectal cancer (LARC). Extended hotspots have focused on the effectiveness of using capecitabine instead of fluorouracil infusion, the combination of multiple drugs and the feasibility of using neoadjuvant chemotherapy instead of neoadjuvant chemoradiotherapy for selective patients. Traditionally, the evaluation of the effect of neoadjuvant therapy has been based on the effect on the pathological complete remission (pCR) rate. However, current studies recommend the disease-free survival (DFS) as a more important outcome. Besides, seeking for effective biomarkers as predictive markers for neoadjuvant therapies or as prognostic markers remains a hotspot in the field of neoadjuvant chemoradiotherapy. The "watch and wait" approach refers to taking a close follow-up strategy instead of direct operation for patients achieving clinically complete remission (cCR) after neoadjuvant therapy. However, there is no unified evaluation criteria and time point for the evaluation of cCR following neoadjuvant therapy. Therefore, there remain a lot of controversies regarding the clinical application of neoadjuvant chemoradiotherapy in LARC. In this manuscript, research progress in the indication for neoadjuvant therapy, improvement in the neoadjuvant therapeutic schedule, advancement of the efficacy evaluation criteria of neoadjuvant therapy, the "watch and wait" approach and other hot topics is summarized to provide references for clinical practice.
Antimetabolites, Antineoplastic ; therapeutic use ; Capecitabine ; therapeutic use ; Chemoradiotherapy ; Fluorouracil ; therapeutic use ; Humans ; Neoadjuvant Therapy ; Neoplasm Staging ; Rectal Neoplasms ; therapy ; Treatment Outcome

Objective To explore the clinical efficacy and safety of off-clamping in robotic-assisted partial nephrectomy (RAPN) for the treatment of renal tumors.Methods From January 2015 to March 2017,the data of 48 patients who underwent off-clamping RAPN were reviewed retrospectively.There were 31 males and 17 females,and the mean age was 57 years (range:23-84 years).The mean tumor size was 3.1 cm (range:1.2-6.4 cm),with the upper,middle,and lower polar tumors account for 35.4％,27.1％,and 37.5％,respectively.The clinical tumor stage was T1N0M0 in all 48 cases,according to the AJCC tumor staging system for renal cancer.Results RAPNs were performed successfully in all 48 cases,without conversion to open surgery.In those patients,the application of off-clamping in robotic-assisted partial nephrectomy was performed in 44 cases.The renal artery and vein was exposed,dissected,isolated and then clamped in 4 cases due to bleeding.The mean surgical time was 85 min (range:75-185 min).The mean estimated blood loss was 134 ml (range:60-270 ml),and no blood transfusion was needed.The wound surface was closed using interrupted suture with Hem-o-lok clips securing each needle point.The mean time for renorrhaphy was 22 min (rang:11-31 min).No intraoperative severe complications such as vascular injury,trauma of abdominal organ occurred.There were 5 complications,including 2 cases of hematuria,2 cases of delayed healing of incision,and 1 case of pneumohypoderma.The pathological diagnosis included 40 cases of renal clear cell carcinoma,3 cases of papillary renal cell carcinoma,and 5 cases of angiomyolipomas.No tumor recurrence or distant metastasis was observed during the average follow-up of 17 months (range 3-27 months).Conclusions Off-clamping RAPN is safe and feasible approach to excise certain kidney tumors.It carries the benefits of less complication,quick recovery,and less ischemia reperfusion renal injury.Off-clamping RAPN would be suitable for those patients with solitary kidneys,renal insufficiency,and bilateral tumors.

As the third confirmed gaseous transmitters, hydrogen sulfide was found to play a vital role in the eternal milieu both physiologically and pathologically. What's intriguing is that, there exists a debate about the role of hydrogen sulfide in the pathogenesis of cancer, especially colorectal cancer. In this manuscript, progress of the effect of low and high dose hydrogen sulfide on the tumorigenesis of colorectal cancer and research on the antitumor new drugs stemmed from the function of hydrogen sulfide is summarized. Recently, the "bell-shape" model of the action of hydrogen sulfide illustrated that hydrogen sulfide was able to promote the progression of tumor in low dose and inhibit the progression of tumor in high dose. Based on these results, both hydrogen sulfide synthesis inhibitors and hydrogen sulfide donors(chimeras with NSAIDs) have been widely studied as potential anti-tumor novel drugs. According to the actual results of present studies, hydrogen sulfide synthesis inhibitors featured by aminooxyacetic acid (AOA) is more promising as a novel kind of drug. The future research based on the relationship between hydrogen sulfide and rectal cancer may bring insights into the development of novel anti-tumor drugs, thus producing tremendous potential clinical value.

Objective To summarize our experience in robotic-assisted laparoscopic surgery for adrenal diseases Methods The clinical data of 243 patients with adrenal tumor treated by robotic-assisted laparoscopic surgery from March 2010 to February 2017 were retrospectively reviewed.There were 99 men and 144 women.The mean age was 51.6 years (range, 19-84).Tumors located at left adrenal in 140 cases, right in 97 cases,and both sides in 6 cases.The average diameter was 3.32 cm (range, 0.8-12 cm).However, there were 41 cases whose tumor diameter were greater than 5 cm.Results There were 2 cases of conversion during operation, 1 case converted to open surgery and the other to the traditional laparoscope surgery.The mean operative time was 35 min (range, 20-130 min).Estimated blood loss was 80 ml (range,20-1 200 ml).Blood transfusion was needed in 6 cases.The mean postoperative hospital stay was 5d (range, 3-20 d).The pathological diagnosis included 37 cases of pheochromocytoma, 149 cases of cortical adenoma, 3 cases of cortical carcinoma, 5 cases of metastatic tumor, 9 cases of adrenal myelolipoma, 3 cases of adrenal cyst, 2 cases of bronchogenic cyst, 25 cases of adrenal nodular hyperplasia,2 cases of angiomyolipomas, 1 case of mature teratoma, 1 case of diffuse large B-Cell lymphoma, 1 case of angioma, and 4 cases of neurofibromatosis.Conclusions Robotic-assisted laparoscopic adrenalectomy was safe and effective.Robotic-assisted laparoscopic surgery has the advantages over laparoscopic surgery in treatment of complicated adrenal tumor, such as large adrenal tumors, pheochromocytoma, bilateral adrenal diseases, overweight and obese patients with adrenal diseases.

Objective To explore the clinical feasibility of robot-assisted laparoscopic radical cystectomy (RARC) with total intracorporeal othotopic ileal neobladder (TIOIN).Methods A consecutive series of 4 patients (2 male,2 female),who underwent RARC with TIOIN by a single surgeon,were included in the retrospective study,between March 2017 and June 2017.Their age ranged from 59 to 71 years,which the mean age was (65.7 ± 4.9) years.Preoperative urinary CT scan,cystoscopic examination and transurethral resection of bladder tumor were performed for diagnosis.Among these,2 patients underwent side-to-side bowel anastomosis using a linear stapler,while hand-sewn anastomosis was performed in the other 2 patients.The detubularized bowel segment was arranged in a U shape,and then the two medial borders were closed to create the posterior wall of the neobladder,which completed a partial U shape and anastomosed with the end of urethra.After placing the single J stents into the ureter,the uretero-neobladder was anastomosed.To close the urine reservoir,each border of the U-shaped segment was folded again and sutured to form a sealed pouch.Results All operations were performed successfully.The average operation time for RARC was 93.2 min (ranging 79-117 min).The average operation time for urinary diversion was 214.2 min (ranging 163-251 min).The mean estimated blood loss was 304.5 ml (ranging 200-400 ml).The mean hospital stay was 20.5 d (ranging 13-32 day).The number of dissected lymph node ranged from 11 to 16 (mean 3.7 ± 2.6).All the surgical margins were negative.The time for postoperative out-of-bed activity and bowel function recovery was 2-3 days and 3-4 days,respectively.The single-J stents were removed 1 months after operation,generally.No urine leakage was noticed after removing the drainage tube and catheter.The lymph leakage was observed in one case,which was resolved 15 days post-operatively after given nutrient therapy.The performance of urinary continence was satisfactory,except one patient complained about the nocturnal incontinence.After the regular pelvic exercise,the symptom improved two months after the operation.Hydronephrosis and intestinal leakage were not observed.Conclusions Our initial experience showed that RARC with TIOIN is feasible and alterative for experienced surgeon.

Objective To investigate the effect of sodium phenylbutyrate (SPB) in modulating docetaxel resistance in human prostate cancer cells in vitro. Methods A PC3/docetaxel-resistant human prostate cancer cell line PC3/DTX was induced and examined for proliferation, viability, and cell inhibition rate in the presence of SPB. The concentration of concentration of docetaxel required to kill 50%of PC3/DTX cells incubated with 0, 1, 2, and 4 mmol/L SPB was determined using MTT assay. Cell apoptosis rate was analyzed with flow cytometry and the cellular expressions of p21, cyclin D1 and survivin proteins were detected using Western blotting. Results Treatment of PC3/DTX cells with 0, 1, 2, and 4 mmol/L of SPB for 48 h resulted in cell viabilities of (99.85±2.69)%, (84.68±3.87)%, (68.65±4.54)%and (43.54±5.69)%, and cell inhibition rates of (10.69±3.65)%, (25.78± 4.58)%, (54.68±3.98)%and (69.84±6.54)%, respectively (P<0.05). The concentration of docetaxel required to kill 50%of PC3/DTX cells cultured in the presence of with 0, 1, 2, and 4 mmol/L SPB was 135.98±2.69, 109.65±3.87, 87.65±3.84 and 64.62±2.98 nmol/L, respectively (P<0.05), and the cell apoptosis rates were (7.2±0.8)%, (10.2±0.9)%, (19.8±2.1)%and (27.4±2.5)%, respectively. SPB treatment promoted the protein expression of p21 and suppressed the expressions of cyclin D1 and survivin in PC3/DTX cells. Conclusion SPB can affect the expressions of p21, cyclin D1, and survivin in PC3/DTX cells and increase the sensitivity to the drug-resistant cells to docetaxel.

Objective To investigate the effect of sodium phenylbutyrate (SPB) in modulating docetaxel resistance in human prostate cancer cells in vitro. Methods A PC3/docetaxel-resistant human prostate cancer cell line PC3/DTX was induced and examined for proliferation, viability, and cell inhibition rate in the presence of SPB. The concentration of concentration of docetaxel required to kill 50%of PC3/DTX cells incubated with 0, 1, 2, and 4 mmol/L SPB was determined using MTT assay. Cell apoptosis rate was analyzed with flow cytometry and the cellular expressions of p21, cyclin D1 and survivin proteins were detected using Western blotting. Results Treatment of PC3/DTX cells with 0, 1, 2, and 4 mmol/L of SPB for 48 h resulted in cell viabilities of (99.85±2.69)%, (84.68±3.87)%, (68.65±4.54)%and (43.54±5.69)%, and cell inhibition rates of (10.69±3.65)%, (25.78± 4.58)%, (54.68±3.98)%and (69.84±6.54)%, respectively (P<0.05). The concentration of docetaxel required to kill 50%of PC3/DTX cells cultured in the presence of with 0, 1, 2, and 4 mmol/L SPB was 135.98±2.69, 109.65±3.87, 87.65±3.84 and 64.62±2.98 nmol/L, respectively (P<0.05), and the cell apoptosis rates were (7.2±0.8)%, (10.2±0.9)%, (19.8±2.1)%and (27.4±2.5)%, respectively. SPB treatment promoted the protein expression of p21 and suppressed the expressions of cyclin D1 and survivin in PC3/DTX cells. Conclusion SPB can affect the expressions of p21, cyclin D1, and survivin in PC3/DTX cells and increase the sensitivity to the drug-resistant cells to docetaxel.

Aim To investigate the roles of chloride channels in the apoptosis and apoptotic volume de-crease (AVD)induced by adriamycin in nasopharyn-geal carcinoma CNE-2Z cells.Methods Apoptotic rates were detected by flow cytometry,and the volume changes were measured by the time-lapse live cell ima-ging technique.The patch clamp technique was used to record whole-cell chloride currents.Results Adria-mycin induced apoptosis of CNE-2Z cells.An early ap-optotic volume decrease was observed in the cell trea-ted with adriamycin.The cell volume was decreased by about 10% in 2 h.Adriamycin activated a chloride current which showed outward rectification.The chlo-ride channel blocker 5-nitro-2-(3-phenylpropylamino)-benzoate (NPPB ) could inhibit the adriamycin-in-duced chloride currents,apoptosis and prevent cell shrinkage.Conclusions Our findings suggest that ad-riamycin causes cell apoptosis by activation of chloride channels.Chloride channels may be involved in the apoptosis and apoptotic volume decrease induced by adriamycin in CNE-2Z cells.

Emergency and complications make bowel resection necessary for patients who suffer from Crohn's diseaes (CD) which is traditionally treated mainly by medical therapy. CD patients can obtain temporary relief after bowel resection. However, the high recurrence rate after surgery tends to result in repeated operations. Preoperative factors, the details of the surgery and postoperative medical treatment are considered to be related to postoperative recurrence. In this manuscript, progress on risk factors associated with postoperative recurrence in patients with Crohn's disease after bowel resection is summarized.
Colectomy ; Crohn Disease ; Humans ; Postoperative Period ; Recurrence ; Reoperation ; Risk Factors

Emergency and complications make bowel resection necessary for patients who suffer from Crohn′s diseaes (CD) which is traditionally treated mainly by medical therapy. CD patients can obtain temporary relief after bowel resection. However, the high recurrence rate after surgery tends to result in repeated operations. Preoperative factors, the details of the surgery and postoperative medical treatment are considered to be related to postoperative recurrence. In this manuscript, progress on risk factors associated with postoperative recurrence in patients with Crohn′s disease after bowel resection is summarized.