The cellular immunotherapy of integrated photothermal anti-oxidation Pd-Se nanoparticles in inhibition of the macrophage inflammatory response in rheumatoid arthritis

Reducing the inflammatory response is a major goal in the therapy of rheumatoid arthritis (RA). Herein, we integrated palladium nanoparticles (Pd NPs) with selenium nanoparticles (Se NPs) and obtained a multiple nanosystem (Pd@Se-HA NPs) that could simultaneously scavenge hydroxyl radicals (⋅OH) and provide a photothermal effect. The Pd@Se-HA NPs were constructed by a simple self-assembly method in which Se NPs were electrostatically bonded to Pd NPs; hyaluronic acid (HA) was linked to the NPs by ester bonding to provide macrophage targeting ability. The experiments show that the combined therapy of eliminating ⋅OH with Se NPs and utilizing PTT with Pd NPs could effectively reduce the inflammatory response in macrophages more effectively than either individual NP treatment. In addition, the outer layer of HA could specifically target the CD44 receptor to enhance the accumulation of Pd@Se NPs at the lesion, further enhancing the therapeutic effect. After treatment for 15 days, the Pd@Se-HA NPs nearly eliminated the inflammatory response in the joints of mice in an induced RA model, and prevented joint damage and degradation.

Expression of LXR-β in human gastric cancer tissue and the effect of GW3965 on the proliferation of gastric cancer cell line SGC-7901 / 中南大学学报(医学版)

OBJECTIVE@#To examine the expression of liver X receptor-β (LXR-β) in human gastric cancer tissue, and to explore the effect of GW3965, an agonist of LXRs, on proliferation of gastric cancer cell line SGC-7901.
@*METHODS@#The immunohistochemical assay was used to detect the expression of LXR-β, activating transcription factor 4 (ATF4) in gastric cancer tissues and the corresponding pericarcinoma tissues in 114 patients. Real-time quantitative PCR and Western blot were used to determine mRNA and protein levels of ATF4 and ATP-binding cassette 1 (ABCA1), one of the downstream target genes of LXRs, in SGC-7901 cells with or without GW3965 treatment. Cell counting kit-8 (CCK-8) assay was performed to detect cell proliferation. The expression of ATF4 was silenced by short hairpin RNA (shRNA).
@*RESULTS@#The expressions of LXR-β and ATF-4 were obviously down-regulated in the gastric cancer tissues than that in the corresponding pericarcinoma tissues (both P<0.05). Compared with the control cells, GW3965 treatment inhibited proliferation of SGC-7901 cells and up-regulated ATF4 and ABCA1 expressions (both P<0.05). Knockdown of ATF4 can reverse the antiproliferative effect of GW3965 on SGC-7901 cells.
@*CONCLUSION@#The expression of LXR-β is decreased in human gastric cancer tissues, and activation of LXRs by GW3965 could inhibit the proliferation of SGC-7901 cells via ATF4.

Construction and evaluation of human Dp71 shRNA vector / 中南大学学报(医学版)

Objective: To construct effective short hairpin RNA (shRNA) recombinant plasmids targeting humanDystrophin Dp71 gene, and evaluate their interference effciency. Methods: hTree pairs of siRNA sequences targeting human Dp71 gene and one pair of control siRNA sequence were designed, synthesized, and then inserted into the pRNAT-U6.1/Neo vector. hTe shRNA recombinant vectors were evaluated by enzyme digestion and sequencing. Dp71-shRNA and control shRNA plasmids were transfected into human normal gastric epithelial cells (GES-1) and humanbronchial epithelium (HBE). Western blot was used to evaluate its interfering effciency. Results: Restriction enzyme digestion and sequencing showed that the Dp71-shRNA vectors were successfully constructed. Western blot displayed that Dp71 protein expression was reduced to a signiifcant degree atfer transfection with the 3 Dp71-shRNA plasmids, and Dp71-shRNA2 plasmid inhibit the Dp71 expression most effciently. Conclusion: Dp71-shRNA vectors have been successfully constructed. The 3 Dp71-shRNA plasmids can inhibit Dp71 expression in GES-1 and HBEC, with Dp71-shRNA2 plasmid displaying the highest inhibition effciency.

Prognostic factor analysis of patients with gastrointestinal stromal tumor undergoing radical operation over 5 years:a report of 97 cases / 中国普通外科杂志

Objective To analyze the independent factors affecting the prognosis of gastrointestinal stromal tumor(GIST) patients undergoing radical operation.Methods The clinical characteristics and follow up data of the 97 patients with GIST underwent radical opsration from January,2001 to January,2003 in our hospital were retrospectively analyzed by univariate and multivariate methods.Results In the univariate analysis of the 97 cases,gender,tumor location,tumor size,tumor cell type,necrosis,mitotic count,and Gleevec administration postoperatively were found to be related to the prognosis of GIST.Multivariate Cox model analysis showed that tumor location,tumor size,tumor cell type,necrosis,mitotic count,and Gleevec administration postoperatively were independent prognostic factors for patients with GIST.Conclusions Tumor location,tumor size,tumor cell type,necrosis,mitotic count are important prognostic factors for patients with GIST undergoing radical operation.

Digestive tract reconstruction after total gastrectomy for gastric cancer / 中国普通外科杂志

Objective To study the optimal procedure of digestive tract reconstruction after total gastrectomy.Methods The clinical data of 122 patients who underwent total gastrectomy in the recent 6 years were(analyzed) retrospectively.Three types of reconstruction procedures,including Orr-type Roux-en-Y(esophagojejunostomy),P-type jejunal pouch Roux-en-Y esophagojejunostomy and distal jejunal aboral pouch Roux-en-Y esophagojejunostomy,were performed.Results There were no significant differences among the three procedures in heartburn and the amount of food intake,frequencies of meal,weight loss,dumping(syndrome),and hemoglobin and albumin levels.The operation time in P-type group was longer than the other two group(P

Surgical management of obstructive colorectal carcinoma / 中国普通外科杂志

Objective To exprole the effect of surgical management of obstructive colorectal carcinoma. Methods A restrospective analysis was made on the clinical data of 76 cases of acute obstructive colorectal carcinoma treated by emergent operation in Xiangya Hospital from October 1997 to October 2002.Among the 76 cases,there were 23 cases of right colon obstruction and 53 cases of left colon or rectal obstruction. Results All the 76 patients received opreation , 55 patients received one stage tumor resection and large intestinal anastomosis, including 19 in right colon and 36 in left colon or rectal obstruetion.Postoperative complications rate was 15.7%(11/76) in this series,including anastomotic leakage in 2, disruption of wound in 1, infection of incisional wound in 6, and pneumonia in 2.Expect one patient died of MSOF,the others were curred by non-operation therapy.The postoperative 1,3,5year survival rate was 98.3%,55%,38.5% in this series.Conclusions One stage resection and anastomosis is a feasible operation for obstructive colorectal carcinoma.Appropriate choice of the operative procedure, skillful operative technique,and prudential perioperative treatment can enhance the cuerative effect and the patients quality of life.

Evaluation of Carcinoembryonic Antigen (CEA) and Carbohydrate199 (CA199) Determination in Recurrence After Radical Colonic Cancer Surgery / 中国医师杂志

Objective To study the clinical values of CEA,CA199 in predicting recurrence of colonic cancer.Methods Radioimmunoassay (RIA) was used to measure serum CEA and CA199 in 60 colonic cancer recurrence patients and 60 non-gastrointestinal patients.Results The serum CEA and CA199 levels in colonic cancer group were significantly higher than those in control group (P

Analysis of therapeutic effect of respiratory training following thoracotomy / 中国组织工程研究

Objective To investigate effect of respiratory training on respiratory function recovery following thoracotomy. Method Respiratory muscle training, productive drainage, exercise and respiratory function training, and appropriate rehabilitation were performed on 216 patients underwent thoracotomy. Result 206 patients showed favorable recovery of respiratory function,7 showed respiratory dysfunction, and 1 developed serious complication. Conclusion Respiratory training after thoracotomy significantly improve respiratory function.

Treatment of blunt liver injury:a report of 109 cases / 中国普通外科杂志

Objective To explore the feasibility and indications of non-operative management for blunt liver injury.Methods The clinical data of 109 patients with blunt liver injury treated in recent 5 years were reviewed retrospectively.Results Among 109 cases, 35 were treated with nonoperation and 33(94.3 %) were cured; there were 3 cases(9.1 %) with complications among the 33 cases who were cured. The mean amount of blood transfusion, hospitalization days and expenses were (2.5?0.8)U,(13.2?1.3)d and (5 250?335) yuan, respectively. Seventy-four cases were treated with operation and 68(91.2 %)were cured, there were 14 cases (20.6 %) with complications among the 68 cases who were cured. The mean amount of blood transfusion,number of hospitalization days and expenses were (8.4?1.1)U,(15.4?0.9)d and (13 550?805) yuan,respectively.The mean amount of blood transfusion and hospitalization expenses of nonoperative group were lower than those of operative group (P

Diagnosis and treatment of gastric volvulus: a report of 30 cases / 中国普通外科杂志

Objective To investigate the pathogenesis, diagnosis and treatment of gastric volvulus. Methods The clinical data of 30 patients with gastric volvulus were analyzed retrospectively. Results 17 patients(56.7%) were diagnosed preoperatively,and 13 patients(43.3%) at exploratory laparotomy. 21 cases(70.0%) was diagnosed as organo-axial type, 8 cases(26.7%) as mesenterico-axial type, and 1 case((3.3%)) as combined type.3 patients underwent gastric volvulus restoration by endoscopy;27 patients (received) operation,and all the 30 patients were discharged in good health.All of the cases were followed up for 5 years;one case,treated by endoscopy,recurred,but none of the other cases recurred. Conclusions Laxity of gastric suspensory ligaments is the main pathogenetic factor of gastric volvulus,but its occurrence is usually caused by multiple factors.The diagnosis depends on the combined analysis of the clinical (manifestations) and radiographic studies or exploratory laparotomy. Operation is the first choice of treatment.

DOSE-EFFECT RELATIONSHIP OF DMPS ON ACUTE POISONING CAUSED BY SCD / 中国药理学通报

In peroneal nerve-anterior tibialis muscle preparations of uretbane anesthetized rabbits, sodium ammonium dimethyl-2 -( propano-1 , 3 - dithiosulfonate ) monohydrate ( SCD ) 7 .5mg/kg iv depressed the antogenous respiration completely and the indirectly elicited twitch tension completely finally. Sodium 2, 3 - dimercaptopropane- 1-sulfonate ( DMPS ) 7、 10mg/kg iv,respectively completely antagonized the respiratory depression and the neuromuscle block, DMPS (2.4、 3.4、 4.9mg/kg, iv ) could antagonize these toxic effects partly. DMPS (62.5mg/kg ,iv)could antagonize the toxic symptom induced by SCD(7.5 mg/kg, iv)in rabbits. At dose level higher than 12.5mg/kg of SCD, this toxin caused tremor and tonic convulsion. e Wfound DMPS (62.5 mg/kg, iv ) combined with diazepam ( 5mg/kg, iv ) has antidotal effects on acute poisoning caused by SCD in rabbits.