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Objective:To analyze the liposoluble components and antioxidant capacity of Caryopteris tangutica. Methods:By using GC-MS, this paper analyzes liposoluble components of different positions of Caryopteris tangutica. By making the removal rate of free radicals with liposoluble components as the index, and making IC 50 as reference indicators to evaluate the antioxidant capacity of lipidsoluble extracts of different parts. Results:There are 31, 40 and 62 compounds identified in the liposoluble components of the stems, leaves and flower, among which unsaturated fatty acids account for the most. The different parts of Caryopteris tangutica all play the role of clearing DPPH and ABTS + free radicals, and the clearing rate of leaves was greater than that of flowers and stems. Conclusion:The unsaturated fatty acids in lipidsoluble components of Caryopteris tangutica are beneficial to the human body, and have antioxidant activity.
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Manganese is an element essential for living organisms. Development of industrial technologies and exploitation of mineral resources have led to the release of large amount of Mn(Ⅱ) into the environment, posing a serious threat to human health. Bioremediation can remove the Mn(Ⅱ) from the environment rapidly and effectively without generating secondary pollution, thus received increasing attention. This review summarized the diversity and distribution of Mn(Ⅱ) removal microorganisms and the associated mechanisms, followed by discussing the effect of environmental factors on microbial Mn(Ⅱ) removal. Finally, the challenges and prospects for bioremediation of Mn(Ⅱ) polluted wastewater were proposed.
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Humans , Biodegradation, Environmental , Manganese , Oxidation-Reduction , WastewaterABSTRACT
Objective:To investigate the effects of tert-butyl hydroperoxide (TBH) on the expression of second mitochondria-derived activator of caspase (Smac) and X-linked inhibitor of apoptosis (XIAP) in mitochondrial pathway after cerebral ischemia/reperfusion injury in rats.Methods:From March to December in 2019, 45 healthy male Sprague-Dawley rats were randomly divided into sham-operation, model and TBH groups. Rat models of cerebral ischemia/reperfusion injury were established by ligation of the left carotid artery. Rat neurological function was evaluated to exclude the rats that failed in cerebral ischemia/reperfusion injury induction. Ten rats were left in each group. At 0.5 and 12 hours after cerebral ischemia/reperfusion injury, rats in the TBH group were treated by intragastric administration of 12.5 mg/kg TBH and those in the sham-operation and model groups were identically treated by intragastric administration of equal volume of 0.9% sodium chloride injection. After 24 hours of reperfusion, rat neurological function was assessed in each group. Then the rats were killed and the brains were harvested. Apoptosis of nerve cells was detected by terminal deoxynucleotidyl transferase dUTP nick end-labeling (TUNEL) assay. The levels of superoxide dismutase (SOD), malondialdehyde (MDA), tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in the brain tissue were detected by enzyme-linked immunosorbent assay. XIAP- and Smac-positive cell count and protein expression were determined by immunohistochemical staining and western blot assay, respectively.Results:Rat neurological function score in the TBH group was significantly lower than that in the model group [(1.36 ± 0.49) points vs. (3.73 ± 0.97) points, t = 6.896, P < 0.001]. In the TBH group, a large number of apoptotic nerve cells were found in the ischemic cerebral cortex, but the number of apoptotic nerve cells in the TBH group was significantly smaller than that in the model group. In the model group, SOD level was significantly lower, MDA, TNF-α and IL-1β levels were significantly higher compared with the sham-operation group [SOD: (51.94 ± 3.46) U/mg vs. (70.68 ± 2.67) U/mg, t = 13.560, P < 0.001; MDA: (5.69 ± 0.78) nmol/mg vs. (1.20 ± 0.96) nmol/mg, t = 11.479, P < 0.001; TNF-α: (89.36 ± 9.84) pg/mg vs. (40.53 ± 4.35) pg/mg, t = 14.353, P < 0.001; IL-1β: (41.35 ± 6.79) pg/mg vs. (17.22 ± 2.31) pg/mg, t = 10.639, P < 0.001]. In the TBH group, SOD level was significantly higher, MDA, TNF-α and IL-1β levels were significantly lower compared with the model group [SOD: (51.94 ± 3.46) U/mg vs. (68.84 ± 5.03) U/mg, t = 8.754, P < 0.001; MDA: (5.69 ± 0.78) nmol/mg vs. (2.46 ± 0.48) nmol/mg, t = 11.153, P < 0.001; TNF-α: (89.36 ± 9.84) pg/mg vs. (57.64 ± 6.22) pg/mg, t = 8.617, P < 0.001; IL-1β: (41.35 ± 6.79) pg/mg vs. (23.84 ± 5.48) pg/mg, t = 6.346, P < 0.001]. XIAP- and Smac-positive cell count and protein expression in the model group were significantly greater than those in the sham-operation group [XIAP-positive cell count: (22.63 ± 4.37) vs. (12.39 ± 3.18), t = 5.992, P < 0.001, Smac-positive cell count: (47.58 ± 6.94) vs. (5.64 ± 1.35), t = 18.759, P < 0.001; XIAP protein expression: (0.53 ± 0.08) vs. (0.24 ± 0.05), t = 9.721, P < 0.001; Smac protein expression: (0.92 ± 0.15) > ( 0.36 ± 0.05), t = 11.200, P < 0.001 ]. In the TBH group, XIAP-positive cell count and XIAP protein expression were significantly higher and Smac-positive cell count and Smac protein expression were significantly lower compared with the model group [XIAP-positive cell count: (36.78 ± 5.26) vs. (22.63 ± 4.37), t = 6.543, P < 0.001, Smac-positive cell count: (31.74 ± 4.26) vs. (47.58 ± 6.94), t = 6.151, P < 0.001; XIAP protein expression: (0.79 ± 0.10) vs. (0.53 ± 0.08), t = 6.420, P < 0.001, Smac protein expression: (0.70 ± 0.09) vs. (0.92 ± 0.15), t = 3.977, P < 0.001]. Conclusion:TBH can effectively reduce neuronal apoptosis, oxidative stress and inflammatory reaction after cerebral ischemia/reperfusion injury, which may be related to the regulation of XIAP and Smac signaling pathways.
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Objective To recognize cancer regions by using segmentation algorithm for pathological slices of gastric cancer based on deep learning. Methods The U-net network was used as the basic structure to design a deeper segmentation algorithm deeper U-Net (DU-Net) for gastric cancer pathological slices. The datasets were segmented into several small blocks by the region overlapping segmentation method. Then the blocks were firstly segmented by the pre-trained DU-Net model, and the new samples were re-synthesized using the image classifier to remove false positive samples. The new samples were repeatedly trained by repeated learning methods, and the results of segmentation were processed with fully connected conditional random field (CRF). Finally, the segmentation pictures of gastric cancer were obtained and validated. Results After 3 times of repeated learning, the mean accuracy of the DU-Net model for pathological slices of gastric cancer was 91.5%, and the mean intersection over union coefficient (IoU) was 88.4%. Compared with the basic DU-Net model without repeated learning, the mean accuracy and mean IoU of the DU-Net network were increased by 2.9% and 5.6%, respectively. Conclusion The segmentation algorithm for pathological slices of gastric cancer based on deep learning can accurately recognize cancer regions, improve the generalization ability and robustness of the model, and can be used for computer-assisted diagnosis of gastric cancer.
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·AIM:To explore the effectiveness of a new non-inverted pedicle internal limiting membrane ( ILM ) flap transposition technique in the treatment of large macular holes (MH). ·METHODS: This was a prospective pilot study which included 9 patients with 10 eyes in Jiangsu Province People's Hospital from December 2016 to February 2017. All patients was diagnosed with large MH (size >400μ m) by the spectra- domain optical coherence tomography (SD-OCT) and underwent the non-inverted pedicle ILM flap transposition surgery. Best-corrected visual acuity (BCVA), SD-OCT images, and MP-1 microperimetry tests were performed pre-operation, 1d, 1wk, 1, 3, and 6mo post-operation. ·RESULTS:The macular hole closure rate after 6mo was 100%. The averaged BCVA improved from 1. 19 ± 0. 54 (LogMAR) pre-operation to 0.70 ± 0.50 (LogMAR) post-operation (P=0.005). The mean retinal sensitivity within 8° and 2° improved from 3.14±4.52dB to 8.91±5.53dB(P=0.008), and 1.46 ± 2.94dB to 6.33 ± 4.90dB (P=0.008) respectively. Preoperative unstable fixation in seven eyes resolved at the last postoperative follow-up.·CONCLUSION: Our non-inverted pedicle internal ILM flap transposition technique shows effectiveness in the treatment of large macular holes with high MH closure rate and improving visual function.
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Tumor is a neoplasm formed by the abnormal proliferation of local tissue cells under the effects of different tumorigenic factors. Tumor-therapy has always been a difficult clinical issue, while regular cancer treatments, such as radiotherapy, chemotherapy and surgery, have obvious limitations. Earlier studies have shown that some obligate anaerobes or facultative anaerobes have anti-tumor effects, for example, Salmonella typhymurium as facultative anaerobic bacteria can selectively colonize tumors and inhibit their growth. Besides, Salmonella has many advantages in tumor-therapy. In the past decade or two, many researchers have carried out genetic manipulation to attenuate the virulence of Salmonella, to improve their specificity of tumor colonization and specially to use attenuated Salmonella as carriers to deliver a variety of anti-tumor therapeutic molecules, and these genetically modified Salmonella have shown good anti-tumor effects in many animal experiments. Along with further research of Salmonella-mediated antitumor treatment, applications of genetically modified Salmonella for more effective tumor-therapy are promising. We reviewed the anti-tumor mechanisms of Salmonella, the research progress in tumor-therapy using genetically modified Salmonella, and current problems and possible solutions.
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Animals , Humans , Microorganisms, Genetically-Modified , Neoplasms , Therapeutics , Salmonella , Genetics , VirulenceABSTRACT
<p><b>OBJECTIVE</b>To report the experience with laparoscopic sleeve gastrectomy as a bariatric surgery in our center.</p><p><b>METHODS</b>Twenty obese patients were followed up for 1 year after receiving laparoscopic sleeve gastrectomy as a bariatric surgery in our center from January 2009 to October 2010, during which their general conditions, complications, and improvement of obesity-related diseases were assessed.</p><p><b>RESULTS</b>Of the 20 patients, 19 underwent laparoscopic sleeve gastrectomy and 1 underwent open sleeve gastrectomy with no death occurred. The average weight loss was 36.4±10.0 kg, the average BMI decreased from 46.1±11.5 to 33.6±5.6 kg/m2, and the excess weight loss was 55.9%±14.2% one year after the operation. The majority of obesity-related diseases were improved. In one year after the operation, excellent, good, fairly good and poor scores were achieved in 2 (10.0%), 8 (40.0%), 7 (35.0%), and 3 patients (15.0%), respectively.</p><p><b>CONCLUSION</b>Laparoscopic sleeve gastrectomy as a bariatric surgery is a safe and feasible procedure for obesity with excellent short-term effects. More studies with a long-term follow-up are needed to validate its benefits.</p>
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Adolescent , Adult , Female , Humans , Male , Middle Aged , Young Adult , Bariatric Surgery , Methods , Body Mass Index , China , Gastrectomy , Methods , Laparoscopy , Methods , Obesity , General Surgery , Treatment Outcome , Weight LossABSTRACT
<p><b>OBJECTIVE</b>To establish a method for the determination of curculigoside in Curculigo orchioides, a species of crude medicine.</p><p><b>METHOD</b>The methanol was used as the solvent of exatraction and the curculigoside was extracted from the crude medicine with the method of the ultrasonic vibration. Using Sep-Pak C18 cartridges to purify the solution, the curculigoside was detected by HPLC. Intersil ODS-3(150 mm x 4.6 mm, 5 microns) chromatographic column was used, mobile phase of methanol-water-ice acetic acid (45:80:1) and detect wavelength was set at UV 283 nm.</p><p><b>RESULT</b>The average recovery was 99.2% for the determination of curculigoside, RSD = 1.7% (n = 5). The content range of the curculigoside for 6 kinds of different samples was from 0.11% to 0.35%.</p><p><b>CONCLUSION</b>This method could be used to control the quality of crude medicine C. orchioides.</p>