Research progress on the mechanisms of microglia in retinal angiogenesis / 国际眼科杂志(Guoji Yanke Zazhi)

As resident immune cells of the retina, retinal microglia constantly monitor the changes of their surroundings and maintain homeostasis through signal transduction with other retinal cells. Retinal microglia play a crucial role not only in the development and physiological processes of the retinal vascular system, but also in pathological neovascularization. In certain retinopathies, activated microglia can stimulate abnormal angiogenesis through neurovascular coupling, leading to irreversible damage. However, the exact mechanisms underlying this process are still unclear. In this review, a brief overview of the relationship between microglia and retinal neovascularization was provided, and the involved cellular and molecular signaling mechanisms were reviewed, aiming to offer new and effective strategies for the prevention and treatment of retinal neovascularization diseases.

Reflections on the evaluation and management of SCI papers based on the category normalized citation impact: Taking a university hospital as an example / 中华医学科研管理杂志

Objective:Analyze the basic information and characteristics of SCI papers published by an institution in 2015-2019 based on the Category Normalized Citation Impact (CNCI), to provide a reference basis for SCI paper management policy improvement.Methods:Retrieve SCI papers completed by the first or correspondent unit from 2015 to 2019 from the scientific research management system of the institution. Obtain index data including journal information, impact factors, and CNCI of this group of papers from Web of science and InCites databases, and use SPSS21.0 statistical software to perform descriptive and chi-square tests.Results:The university-affiliated hospital published 3201 SCI papers from 2015-2019, with a growing trend. These papers were most frequently published in the 1<IF<3 zone, accounted for 44.92%, followed by the 3<IF<5 zone, accounted for 32.27%. These papers are mainly in Q2 journals, accounted for 31.52%, while Q1 and Q3 journals each account for 25%. From the perspective of CNCI, the average CNCI of papers in 2015-2017 was less than 1, and the average CNCI of papers in 2018-2019 was greater than 1, with no statistical difference in CNCI values between years. The proportion of high CNCIs was higher for papers with high IF. The average CNCI per page for papers in Q1 and Q2 was greater than 1, and the average CNCI per page for papers in Q3 and Q4 was less than 1. The proportion of high CNCIs was higher for papers in Q1.Conclusions:The evaluation conclusions reached under different research management perspectives are in-consistent. A comprehensive evaluation of papers based on journal divisions and CNCI is more reasonable. In a new era where indicators such as number of papers and impact factor are not the only thing that matters, it is relevant to select the top journals in the discipline and to apply comprehensive evaluation indicators such as CNCI to the evaluation of papers.

Analysis of the therapeutic effect of cortical-sparing adrenalectomy on bilateral pheochromocytoma / 中华泌尿外科杂志

Objective:To investigate the efficacy and safety of cortical-sparing adrenalectomy (CSA) in the treatment of bilateral pheochromocytoma.Methods:The clinical data of 20 patients with bilateral pheochromocytoma treated in Xiangya Hospital of Central South University from January 2004 to December 2019 were analyzed retrospectively, including 10 males and 10 females. The average age of onset was 32.5 (8-51) years. 3 cases had a family history of pheochromocytoma. There were 14 and 6 patients with bilateral synchronous and metachronous onset, respectively. The mean value of vanilmandelic acid (VMA) in 20 cases was (106.4 ± 60.0) μ mol/24h. Preoperative enhanced CT showed a soft tissue mass with uneven enhancement in the adrenal region, with low-density necrosis, which suggested the diagnosis of Pheochromocytoma. All 20 cases underwent CSA under general anesthesia. In 14 cases of bilateral synchronous disease, 9 cases underwent simultaneous operation and 5 cases underwent staged operation; 6 patients with metachronous disease underwent bilateral tumor resection successively. Laparoscopic surgery was performed in 18 cases and open surgery in 2 cases. Through the abdominal or retroperitoneal approach, open the fat capsule around the upper pole of the kidney, free the medial edge of the upper pole of the kidney, expose the adrenal gland and tumor, completely remove the tumor and capsule, ensure that the adrenal tissue is 3-5 mm away from the cutting edge of the tumor, and the reserved cortical size is at least 1 / 3 of the ipsilateral adrenal gland. The central adrenal vein was preserved as much as possible to reduce the damage to the adrenal vascular bed. The operation related data, intraoperative monitoring records, postoperative complications and long-term follow-up results were recorded.Results:All the 20 cases were successfully completed without tumor rupture. The operation time of simultaneous operation and staged operation were (242.3 ± 61.0) min and (137.9 ± 60.3) min, respectively. The number of patients admitted to ICU after operation was 7 and 2, respectively ( P<0.05); The intraoperative bleeding volume was (528.6 ± 355.7) ml and (277.8 ± 264.7) ml, the number of blood transfusion cases were 5 and 2 cases, and the average hospital stay was (7.4 ± 2.0) d and (7.8 ± 3.3) d, respectively ( P>0.05). 20 cases took glucocorticoid orally (prednisone 5 mg, once every 12 hours) after operation. There was no obvious manifestation of adrenocortical dysfunction and Addison's crisis. The hormone was stopped gradually from 2 weeks to 1 month after operation. The average follow-up was 5.4 (1.0-16.0) years. There were 3 cases of recurrence and no metastasis. Gene detection was performed in 10 cases after operation, and 7 cases carried pheochromocytoma RET and VHL pathogenic gene mutations (RET in 2 cases and VHL in 5 cases). Conclusion:Although CSA has a certain risk of recurrence, it avoids hormone replacement and does not increase the risk of metastasis and death. It is recommended for the treatment of hereditary pheochromocytoma, especially bilateral pheochromocytoma.

Combined treatment using cell scaffold and human fibroblast growth factor for small soft tissue defects of digits caused by trauma / 中华整形外科杂志

Objective@#To assess the effect of combined treatment using cell scaffold and human fibroblast growth factor for small soft tissue defects of digits caused by trauma.@*Methods@#From May 2012 to September 2016, twenty cases of small soft tissue defect of digits were repaired with cell scaffold combined with recombinant human basic fibroblast growth factor. The average defect area was 2.5 cm2. Wounds were debrided and repaired with artificial dermis. Every 2 or 3 days the dressings were changed and the wounds were treated externally with fibroblast growth factor until cell scaffolds have been removed 3-4 weeks after surgery.@*Results@#The group of 20 cases was followed up for 2-24 months. Wounds were healed with satisfactory appearance and no recurrence of wound or obvious hypertrophic scar was observed. No obvious functional problem was found in interphalangeal motion.@*Conclusions@#The method of repairing wound with cell scaffold combined with human fibroblast growth factor is simple and it result in healing of wounds with high quality.It provides a new choice for repairing wound in digits.

Retroperitoneal laparoscopic with renal pedicle rotation for partial nephrectomy of ventro-renal tumor / 北京大学学报(医学版)

Objective: Retro-laparoscopic partial nephrectomy is a challenge for ventro-renal tumors, especially hilar tumors.The tumors are partial or entirely out of operative field and there is blind space for operation.To solve this problem, a set of techniques including renal pedicle rotation is developed.Methods: A set of techniques including renal pedicle rotation, double-layer suture, early artery unclamping for retro-laparoscopic nephrectomy for ventro-renal tumors, especially hilar tumors were developed.Hilar tumors were located anteriorly to the angle of the renal and renal arteries and in contact with the anterior surface of the renal artery.The evaluation of the outcomes included the operation time, warm ischemia time, estimated haemorrhage, surgical margin, renal function after operation, and complications.This study reviewed the data of 28 patients with ventro-renal tumor, including 15 patients with complex hilar tumors.Results: The average tumor size was (3.8±0.5) cm.The average R.E.N.A.L score was 8 (ranging from 7 to 9).The average warm ischemia time was (23.8±4.7) min, and suture time was (26.2±6.5) min, and operation time was (124.1±12.1) min.The median hospital stay was 4 days and the average estimated haemorrhage was (139.1±54.0) mL.All the surgeries were operated under laparoscope and no surgery switched to open surgery.Seven patients developed Clavien Dindo Ⅰ-Ⅱ complications after operation.Three patients (10.7%) developed collective system damage and received repair of collective system in time and three patients (10.7%) developed slightly gross hematuria (Clavien-DindoⅠ).Two patients developed wound infection (Clavien-DindⅡ).Three patients (10.7%) got renal vein clamped because of capillary hemorrhage from basilar part of tumors.There were 14 patients received early unclamping of renal artery, and no obvious renal vessel damage was found.There were statistically significant differences between the serum creatinine levels (P<0.05) and the estimated glomerular filtration rates (P=0.02) before and after surgery.All the patients'' serum creatinine levels were in normal range and no patient needed regular dialysis.There was no positive surgical margin and the median follow-up was 7 months without local recurrence or distant metastasis.Conclusion: It is safe and effective to apply renal pedicle rotation technique in retro-laparoscopic partial nephrectomy for ventro-renal tumors.The short-term follow-up results are optimistic, but long follow-up is required.

Treatment of varicocele combined with asthenospermia by microsurgical shunt: 3 cases report / 中南大学学报(医学版)

To investigate the clinic value of microsurgical shunt for the treatment of varicocele combined with asthenspermia,the clinical data and therapeutic method for 3 patients,who conducted the microscope spermatic vein high ligation combined with superficial epigastric vein flow,were retrospectively analyzed.No postoperative complications were found,and the original symptoms and signs were disappeared.All patients were conducted scrotal ultrasound and semen routine after 3 months,and all indexes,including maximum internal diameter of the cord vein (erect position),sperm density,sperm survival rate,sperm deformity rate and sperm forward movement rate,were gradually improved.Consequently,high ligation of spermatic vein combined with vascular bypass surgery under the microscope can block the countercurrent venous blood and establish a new return channel to the testis.Meanwhile,it can also protect the testicular artery and lymph-vessel.It is worth to be spread for the treatment ofvaricocele combined with asthenospermia.

Experience of laparoscopic repair in 5 patients with vesicovaginal fistula / 中南大学学报(医学版)

OBJECTIVE@#To explore new methods for laparoscopic repair of vesicovaginal fistula.@*METHODS@#Five patients with vesicovaginal fistula in Xiangya Hospital, Central South University, were reviewed retrospectively from May 2013 to July 2014. All patients underwent laparoscopic repair surgery, and the surgical methods were analyzed. The operative time, intraoperative blood loss, and hospital stay time were recorded. The duration of follow-up was from 4 to 12 months.@*RESULTS@#Th e surgical procedures for all 5 patients were successful. No open surgery was required. The operative time was 70~120 (mean: 97) min, the intraoperative blood loss was 40~70 (mean: 54) mL, the hospital stay time was 4~8 (mean: 5.8) days. During the follow up of 4~12 (mean: 7.6) months, no recurrence was observed.@*CONCLUSION@#Laparoscopic repair of vesicovaginal fistula is a feasible and safe and effective procedure with less blood loss and shorter recovery time, which can minimize surgery damage and improve successful rate.

Exploration of hematuria in urinary system integrated courses for eight-year medical educa-tion program / 中华医学教育探索杂志

Organ system based integrated teaching model has been adopted in several medical schools, and these schools face some challenges in this teaching process. In order to provide new sights for organ system based integrated teaching reform in eight-year medical education program, ex-ploration of setting up three-staged-dimensional integrated teaching models was conducted in urinary system by hematuria, and designing related teaching objectives, teaching programs and assessment form to optimize teaching quality in this teaching methods, according to characteristics of the urinary systemic diseases, cultivating objectives of eight-year medical education program and teaching experi-ence of Xiangya School of Medicine.

Expression of transcriptional factor Snail and adhesion factor E-cadherin in rectal cancer / 国际外科学杂志

Objective To investigate the expression of E-cadherin and Snail proteins in rectal cancer and their significance. Methods The expression of Snail and E-cadherin proteins was detected using immunohistochemical SABC method in 101 cases of rectal cancer tissues. Results The positive rate of Snail in rectal cancer was 78.2% (79/101). The negative expression rate of E-cadherin in rectal cancer was 62.4% (63/101). The expression of Snail and E-cadherin were significantly related with the lymph node metastasis and Dukes' stage of rectal cancer (P ＜ 0.05). Conclusion The overexpression of Snail and the decreased expression of E-cadherin might be important biological markers for malignant transformation, invasion and metastasis of rectal carcinoma.

Cloning and expression of fox growth hormone gene in Pichia pastoris / 生物工程学报

To prepare recombinant fox growth hormone (fGH), we amplified its cDNA from silver fox pituitary tissue by RT-PCR and cloned into yeast shuttle vector pPIC9K down stream of a-factor signal peptide sequence by SnaB I and Not I restriction sites. The recombinant secretion vector pPIC9K/fGH, linearized by Sal I, was transformed into histidine-deficient Pichia pastoris strain GS115 by electroporation. We selected His+ -transformed methylotropic (His+, Mut+) yeast using histidine-absent medium containing dextrose (MD) or methanol (MM) as the only carbon source, and then screened the recombinant GS115 with multi-copy fGH genes by G418. The secretive expression of fGH was performed under the induction of methanol in shaking flask culture. The results showed that the fGH cDNA sequence amplified in this paper was basically in consistence with the published in GenBank. We achieved the secretive expression of recombinant fGH identified by SDS-PAGE and Western blotting. The fGH expression level was 119 mg/L, accounted for 34% of total proteins in fermentation medium.