1.Expression of EVI1 gene and its clinical significance in pediatric acute myeloid leukemia
Chenyu ZHENG ; Xianhao WEN ; Yuxia GUO ; Xianmin GUAN ; Jie YU ; Jianwen XIAO
Journal of Clinical Pediatrics 2017;35(5):331-335
Objective To investigate the relationship between EVI1 gene expression and clinical features and prognosis of children with acute myeloid leukemia (AML). Methods EVI1 gene was detected in AML children, correlation of clinical and lab features, prognosis of AML children with EVI1 gene were analyzed. Results EVI1 expression is positive in 38 of 145 children with AML. There were no significant differences in age, gender, hemoglobin concentration, leukocytes and platelet count, subtype of morphology, ratio of chromosomal anomaly and complex karyotypes between EVI1 positive and EVI1 negative group (P>0.05); coexist genes were detected in 9 cases (23.68%) of EVI1 positive group. Rate of complete remission (CR) was 91.67% in 24 cases of EVI1 positive patients received chemotherapy. Relapse rate was 64.29% and 14.29% in EVI1 positive patients who received chemotherapy and allo-hematopoietic stem cell transplantation (allo-HSCT), retrospectively and significant differences were found (P<0.05). There was no significant difference in CR but significant difference was found in event free survival (P<0.05) for EVI1 positive and EVI1 negative patients who received chemotherapy. EVI1 gene kept negative when bone marrow relapse occurred in two patients with EVI1 positive at diagnosis. Conclusion EVI1 gene may play adverse role in pediatric AML; prognosis of EVI1 positive AML patients can be improved by allo-HSCT; follow-up of EVI1 transcript levels is insufficient to monitoring of minimal residual disease.
2.Banqiao Codonopisis Pilosula improves cognitivedysfunction induced by high GSK-3β activity and its possible mechanism
Hongbin LUO ; Xiangyu LIU ; Nanqiao MOU ; Wei CHEN ; Shasha FAN ; Wenzhi XIE ; Nan SHANG ; Chenyu YANG ; Fengfeng XIE ; Qin CHEN ; Zheng WEI
Chinese Pharmacological Bulletin 2017;33(8):1060-1067
Aim To assess the effects of Banqiao Codonopisis Pilosula(BCP)decoction on learning and memory dysfunction in AD model rats induced by high activity GSK-3β and its possible mechanism.Methods The SD rats(4 months old,♂)were divided into five groups,namely,sham-operated group(blank group),AD model group,BCP high-dose(2.16 g·kg-1·d-1)group,BCP medium-dose(1.08 g·kg-1·d-1)group,and BCP lower-dose(0.54 g·kg-1·d-1)group.Treatment group received BCP decoction by gavage once a day for 14 days,while other groups were offered drinking water by gavage once a day for 14 days.The autonomous behavior activities of all rats were observed and recorded after gavage.In the last seven days by gavage,Morris water maze test was used to test the spatial learning and memory ability of the five groups.After five days training,treatment groups and AD model group were injected wortmannin(WT,PI3K specific inhibitor)and GF-109203X(GFX,PKC specific inhibitor)(100 μmol·L-1 of each,total volume of 10 μL)into the right lateral ventricle of the rats.The blank group was only injected 2%DMSO.The spatial memory retention was detected by water maze 24 hours after lateral ventricle injection.Then,changes in the spatial learning memory of rats were observed.The level of Tau phosphorylation in SD rat hippocampus and the expression and activity changes of related protein kinase GSK-3β were detected by Western blot and immunohistochemistry.The changes of Nissl bodies in SD rat hippocampus were observed by Nissl′s staining.Results After intragastric administration of BCP,the rat autonomous behavior activities in each group all showed a declining trend,and the differences in low-dose and middle-dose groups had statistical significance compared with blank group.The Morris water maze tests showed that the latency navigation of model group was significantly longer than that of blank group(P<0.01),while that of the BCP three doses groups was shorter than that of model group(P<0.05).Compared with the same group,the latency navigation of the three groups after gavage BCP low,middle and high dose was significant shorter than that without gavage(P<0.05).Western blot results showed that the activity of GSK-3β in AD model group was up-regulated compared with the blank group.However,BCP inhibited activity of GSK-3β.Western blot and immunohistochemistry results showed the level of Tau phosphorylation in AD model group was increased compared with the blank group in the area of CA3(P<0.05).Compared with AD model group,the level of Tau phosphorylation was decreased in treatment group.Nissl′s staining results showed that dendritic spines in AD model group was significantly attenuated compared with the blank group(P<0.05).Far more dendritic spines were observed in treatment group than in AD model group.The number of Nissl′s bodies in neuron cells of hippocampus in hippocampal CA3 was obviously larger in treatment groups than in AD model group.These effect of BCP was dose-dependent.Conclusions BCP can prevent the learning and memory dysfunction in AD model rats induced by high activity of GSK-3β.The mechanism may be related to inhibiting GSK-3β activity and then reducing the level of phosphorylation of Tau and improving neural development.
3.Anti-oxidative Stress Effect of Lycopene on Motor Function after Spinal Cord Injury in Rats
Xiao LI ; Chenyu LUO ; Zheng YANG ; Shaohua XIE ; Yao ZHANG ; Haiyan YANG ; Yangding MA ; Yi ZHANG ; Wensi HU ; Rui ZHUO ; Yaguang LI
Chinese Journal of Rehabilitation Theory and Practice 2013;19(2):132-135
Objective To observe the influence of anti-oxidative stress effect of lycopene (LP) on motor function after spinal cord injury (SCI) in rats. Methods 36 healthy adult Sprague-Dawley rats were randomly divided into Groups A, B and C with 12 rats in each group.SCI model was made by Allen's mode (10 g×25 mm) on T9. Group A received no treatment, 30 mg/kg methylprednisolone sodium succinate was injected for Group B in peritoneal cavity 30 min after SCI, 20 mg/kg LP was given orally for Group C. On the 1st d, 3rd d and 7th d after operation, the motor function was assessed by slanting board test and Basso-Beattie-Bresnahan scale (BBB); superoxide dismutase (SOD) and malondialdehyde (MDA) were determined in serum. Results Compared with Group A, the scores of the slanting board test significantly increased in Group C 1 d, 3 d, and in Group B 1 d, 3 d and 7 d after operation (P<0.05); the BBB scores significantly increased in Group C 1 d, 3 d and 7 d, and in Group B 1 d, 7 d after operation (P<0.05); the activity of SOD significantly increased in Group C 1 d, 3 d and 7 d, and in Group B 3 d, 7 d after operation (P<0.05); the content of MDA significantly decreased in Group C 3 d, 7 d, and in Group B 1 d, 7 d after operation (P<0.05). Conclusion Lycopene can reduce the level of oxidative stress and promote the motor function in rats after acute SCI.
4.Prognostic significance of fibrinogen concentration combined with neutrophil-to-lymphocyte ratio in esophageal squamous cell carcinoma patients receiving neoadjuvant therapy
Zhuo FENG ; Hui LUO ; Yanan SUN ; Xiao LIU ; Xue LI ; Yingying CUI ; Chenyu WANG ; Xiaoli ZHENG ; Hao WANG ; Ke YE ; Chengcheng FAN ; Hong GE
Chinese Journal of Radiation Oncology 2019;28(3):188-192
Objective To evaluate the prognostic value of a novel prediction model based on fibrinogen concentration in combination with neutrophil-to-lymphocyte ratio (F-NLR score) in patients with esophageal squamous cell carcinoma (ESCC) receiving neoadjuvant therapy and investigate their relationship with pathologic complete response (pCR).Methods Clinical data of 218 eligible ESCC patients treated with neoadjuvant therapy in the Affiliated Cancer Hospital of Zhengzhou University between 2012 and 2015 were retrospectively analyzed.The cut-off values for fibrinogen and neutrophil-to-lymphocyte ratio (NLR)were defined by the receiver operating characteristic (ROC) curve.The effects of different F-NLR scores on survival and pCR were evaluated.The survival rate was analyzed using the Kaplan-Meier method.The relationship among fibrinogen,NLR and pCR was analyzed by using Wilcoxon rank sum test.Results The 3-year overall survival (OS) rates with F-NLR scores of 0,1 and 2 were 72.1%,66.5% and 50.2%(P=0.010),respectively.The corresponding 3-year disease-free survival (DFS) rates were 64.1%,60.2% and 45.4% (P=0.012),respectively.The clinical prognosis of patients with an F-NLR score of 2 was significantly worse compared with those of their counterparts with an F-NLR score of 0-1 (P=0.003).Multivariate analysis demonstrated that the F-NLR score (P=0.004) and TNM stage (P=0.000) were the independent prognostic factors.Conclusions The F-NLR score can be used as an independent prognostic factor for ESCC patients treated with neoadjuvant therapy,which is promising supplement to current TNM staging system,thereby facilitating more accurate risk stratification analysis and achieving individualized multidisciplinary treatment for ESCC patients.
5.Patent Analysis of Artemsia Argyi Based on Incopat Patent Database
Lichun YE ; Chenyu WANG ; Qin YUAN ; Junjie HU ; Guohua ZHENG ; Benda XIAO ; Xinan LIAO ; Zhaohua SHI
World Science and Technology-Modernization of Traditional Chinese Medicine 2023;25(6):1881-1894
Artemsia argyi Levl.et Vant is a commonly used Chinese herbal medicine and moxibustion raw material plant,so far has more than two thousand years of medicinal history,as one of the most commonly used Chinese medicinal materials.The incopat patent database was used to search the worldwide patent data of the last 20 years,and a total of 25279 argyi related patents were retrieved.The pattern of argyi patents was analyzed from the perspectives of global application trend,main technical fields,national economy composition,applicant ranking,patent value and other aspects by means of graph combination.The analysis shows that the innovation and development of argyi is in the stage of rapid development;The medical,Chinese patent medicine,cosmetics and physiotherapy of argyi are the hot research and development of current technology;There are a large number of patents related to argyi in the world,but they are mainly distributed in China and South Korea.Among them,the number of patents related to argyi in China reaches 20381,far higher than that in other countries,but the number of high-value patents is not very large,and the value and quality of patents are still insufficient compared with other countries.From the perspective of the current development trend of argyi,with the deepening of clinical application recognition and scientific research of argyi,there is a large patent space in the field of argyi.Patent applicants can formulate corresponding patent application strategies according to the global development opportunities,technological development status and existing weaknesses.
6.Epidemiological characteristic of viral encephalitis in children and adolescents in Henan Province, 2012-2023
Shujie HAN ; Shouhang CHEN ; Bowen DAI ; Yu CHEN ; Shujuan HAN ; Ruyu ZHANG ; Chenyu WANG ; Qingmei WANG ; Jiaying ZHENG ; Guangcai DUAN ; Fang WANG ; Yuefei JIN
Chinese Journal of Epidemiology 2024;45(6):852-856
Objective:To understand the epidemiological characteristics and spatiotemporal distribution of viral encephalitis in children and adolescents in Henan Province from 2012 to 2023.Methods:The information about viral encephalitis cases from October 1, 2012 to July 26, 2023 were collected from Zhengzhou Children's Hospital (National Children's Regional Medical Center),Henan Provincial Children's Hospital for the analyses on temporal distribution the cases, the severe illness rate, age distribution, pathogen type and imaging findings of the cases.Results:A total of 6 276 cases of viral encephalitis were included in this study after excluding cases with incomplete information. The cases mainly originated from Zhengzhou (38.96%), followed by Zhoukou (9.93%), Xuchang (8.68%), Zhumadian (7.90%) and Pingdingshan (7.39%). The cases in boys accounted for 62.13% and the cases in girls accounted for 37.87%. Most cases (72.45%) occurred in age group 7-13 years. The overall rate of severe illness cases was 4.51% from 2012 to 2023. There were significant differences in severe illness cases among different areas and years ( χ2=5.33, P=0.021; χ2=48.14, P<0.001). Enteroviruses were mainly detected (31.57%), in which Coxsackie virus was predominant (58.37%). Imaging findings showed that cerebral hemisphere damage was most common in children and adolescents with viral encephalitis (54.93%). Conclusions:From 2012 to 2023, more cases of viral encephalitis occurred in boys in Henan. Children and adolescents aged 7-13 years were the main affected group. The prevention of enteroviruses infection, especially Coxsackie virus, needs to be strengthened. Special attention should be paid to the prevention of cerebral hemisphere damage after viral encephalitis diagnosis.
7.Safety of double and a half layered esophagojejunal anastomosis in radical gastrectomy: A prospective, multi-center, single arm trial
Pengfei MA ; Sen LI ; Gengze WANG ; Xiaosong JING ; Dayong LIU ; Hao ZHENG ; Chaohui LI ; Yunshuai WANG ; Yinzhong WANG ; Yue WU ; Pengyuan ZHAN ; Wenfei DUAN ; Qingquan LIU ; Tao YANG ; Zuomin LIU ; Qiongyou JING ; Zhanwei DING ; Guangfei CUI ; Zhiqiang LIU ; Ganshu XIA ; Guoxing WANG ; Panpan WANG ; Lei GAO ; Desheng HU ; Junli ZHANG ; Yanghui CAO ; Chenyu LIU ; Zhenyu LI ; Jiachen ZHANG ; Changzheng LI ; Zhi LI ; Yuzhou ZHAO
Chinese Journal of Gastrointestinal Surgery 2023;26(10):977-985
Objective:To evaluate the safety of double and a half layered esophagojejunal anastomosis in radical gastrectomy.Methods:This prospective, multi-center, single-arm study was initiated by the Affiliated Cancer Hospital of Zhengzhou University in June 2021 (CRAFT Study, NCT05282563). Participating institutions included Nanyang Central Hospital, Zhumadian Central Hospital, Luoyang Central Hospital, First Affiliated Hospital of Henan Polytechnic University, First Affiliated Hospital of Henan University, Luohe Central Hospital, the People's Hospital of Hebi, First People's Hospital of Shangqiu, Anyang Tumor Hospital, First People's Hospital of Pingdingshan, and Zhengzhou Central Hospital Affiliated to Zhengzhou University. Inclusion criteria were as follows: (1) gastric adenocarcinoma confirmed by preoperative gastroscopy;(2) preoperative imaging assessment indicated that R0 resection was feasible; (3) preoperative assessment showed no contraindications to surgery;(4) esophagojejunostomy planned during the procedure; (5) patients volunteered to participate in this study and gave their written informed consent; (6) ECOG score 0–1; and (7) ASA score I–III. Exclusion criteria were as follows: (1) history of upper abdominal surgery (except laparoscopic cholecystectomy);(2) history of gastric surgery (except endoscopic submucosal dissection and endoscopic mucosal resection); (3) pregnancy or lactation;(4) emergency surgery for gastric cancer-related complications (perforation, hemorrhage, obstruction); (5) other malignant tumors within 5 years or coexisting malignant tumors;(6) arterial embolism within 6 months, such as angina pectoris, myocardial infarction, and cerebrovascular accident; and (7) comorbidities or mental health abnormalities that could affect patients' participation in the study. Patients were eliminated from the study if: (1) radical gastrectomy could not be completed; (2) end-to-side esophagojejunal anastomosis was not performed during the procedure; or (3) esophagojejunal anastomosis reinforcement was not possible. Double and a half layered esophagojejunal anastomosis was performed as follows: (1) Open surgery: the full thickness of the anastomosis is continuously sutured, followed by embedding the seromuscular layer with barbed or 3-0 absorbable sutures. The anastomosis is sutured with an average of six to eight stitches. (2) Laparoscopic surgery: the anastomosis is strengthened by counterclockwise full-layer sutures. Once the anastomosis has been sutured to the right posterior aspect of the anastomosis, the jejunum stump is pulled to the right and the anastomosis turned over to continue to complete reinforcement of the posterior wall. The suture interval is approximately 5 mm. After completing the full-thickness suture, the anastomosis is embedded in the seromuscular layer. Relevant data of patients who had undergone radical gastrectomy in the above 12 centers from June 2021 were collected and analyzed. The primary outcome was safety (e.g., postoperative complications, and treatment). Other studied variables included details of surgery (e.g., surgery time, intraoperative bleeding), postoperative recovery (postoperative time to passing flatus and oral intake, length of hospital stay), and follow-up conditions (quality of life as assessed by Visick scores).Result:[1] From June 2021 to September 2022,457 patients were enrolled, including 355 men and 102 women of median age 60.8±10.1 years and BMI 23.7±3.2 kg/m2. The tumors were located in the upper stomach in 294 patients, mid stomach in 139; and lower stomach in 24. The surgical procedures comprised 48 proximal gastrectomies and 409 total gastrectomies. Neoadjuvant chemotherapy was administered to 85 patients. Other organs were resected in 85 patients. The maximum tumor diameter was 4.3±2.2 cm, number of excised lymph nodes 28.3±15.2, and number of positive lymph nodes five (range one to four. As to pathological stage,83 patients had Stage I disease, 128 Stage II, 237 Stage III, and nine Stage IV. [2] The studied surgery-related variables were as follows: The operation was successfully completed in all patients, 352 via a transabdominal approach, 25 via a transhiatus approach, and 80 via a transthoracoabdominal approach. The whole procedure was performed laparoscopically in 53 patients (11.6%), 189 (41.4%) underwent laparoscopic-assisted surgery, and 215 (47.0%) underwent open surgery. The median intraoperative blood loss was 200 (range, 10–1 350) mL, and the operating time 215.6±66.7 minutes. The anastomotic reinforcement time was 2 (7.3±3.9) minutes for laparoscopic-assisted surgery, 17.6±1.7 minutes for total laparoscopy, and 6.0±1.2 minutes for open surgery. [3] The studied postoperative variables were as follows: The median time to postoperative passage of flatus was 3.1±1.1 days and the postoperative gastrointestinal angiography time 6 (range, 4–13) days. The median time to postoperative oral intake was 7 (range, 2–14) days, and the postoperative hospitalization time 15.8±6.7 days. [4] The safety-related variables were as follows: In total, there were 184 (40.3%) postoperative complications. These comprised esophagojejunal anastomosis complications in 10 patients (2.2%), four (0.9%) being anastomotic leakage (including two cases of subclinical leakage and two of clinical leakage; all resolved with conservative treatment); and six patients (1.3%) with anastomotic stenosis (two who underwent endoscopic balloon dilation 21 and 46 days after surgery, the others improved after a change in diet). There was no anastomotic bleeding. Non-anastomotic complications occurred in 174 patients (38.1%). All patients attended for follow-up at least once, the median follow-up time being 10 (3–18) months. Visick grades were as follows: Class I, 89.1% (407/457); Class II, 7.9% (36/457); Class III, 2.6% (12/457); and Class IV 0.4% (2/457).Conclusion:Double and a half layered esophagojejunal anastomosis in radical gastrectomy is safe and feasible.
8.Safety of double and a half layered esophagojejunal anastomosis in radical gastrectomy: A prospective, multi-center, single arm trial
Pengfei MA ; Sen LI ; Gengze WANG ; Xiaosong JING ; Dayong LIU ; Hao ZHENG ; Chaohui LI ; Yunshuai WANG ; Yinzhong WANG ; Yue WU ; Pengyuan ZHAN ; Wenfei DUAN ; Qingquan LIU ; Tao YANG ; Zuomin LIU ; Qiongyou JING ; Zhanwei DING ; Guangfei CUI ; Zhiqiang LIU ; Ganshu XIA ; Guoxing WANG ; Panpan WANG ; Lei GAO ; Desheng HU ; Junli ZHANG ; Yanghui CAO ; Chenyu LIU ; Zhenyu LI ; Jiachen ZHANG ; Changzheng LI ; Zhi LI ; Yuzhou ZHAO
Chinese Journal of Gastrointestinal Surgery 2023;26(10):977-985
Objective:To evaluate the safety of double and a half layered esophagojejunal anastomosis in radical gastrectomy.Methods:This prospective, multi-center, single-arm study was initiated by the Affiliated Cancer Hospital of Zhengzhou University in June 2021 (CRAFT Study, NCT05282563). Participating institutions included Nanyang Central Hospital, Zhumadian Central Hospital, Luoyang Central Hospital, First Affiliated Hospital of Henan Polytechnic University, First Affiliated Hospital of Henan University, Luohe Central Hospital, the People's Hospital of Hebi, First People's Hospital of Shangqiu, Anyang Tumor Hospital, First People's Hospital of Pingdingshan, and Zhengzhou Central Hospital Affiliated to Zhengzhou University. Inclusion criteria were as follows: (1) gastric adenocarcinoma confirmed by preoperative gastroscopy;(2) preoperative imaging assessment indicated that R0 resection was feasible; (3) preoperative assessment showed no contraindications to surgery;(4) esophagojejunostomy planned during the procedure; (5) patients volunteered to participate in this study and gave their written informed consent; (6) ECOG score 0–1; and (7) ASA score I–III. Exclusion criteria were as follows: (1) history of upper abdominal surgery (except laparoscopic cholecystectomy);(2) history of gastric surgery (except endoscopic submucosal dissection and endoscopic mucosal resection); (3) pregnancy or lactation;(4) emergency surgery for gastric cancer-related complications (perforation, hemorrhage, obstruction); (5) other malignant tumors within 5 years or coexisting malignant tumors;(6) arterial embolism within 6 months, such as angina pectoris, myocardial infarction, and cerebrovascular accident; and (7) comorbidities or mental health abnormalities that could affect patients' participation in the study. Patients were eliminated from the study if: (1) radical gastrectomy could not be completed; (2) end-to-side esophagojejunal anastomosis was not performed during the procedure; or (3) esophagojejunal anastomosis reinforcement was not possible. Double and a half layered esophagojejunal anastomosis was performed as follows: (1) Open surgery: the full thickness of the anastomosis is continuously sutured, followed by embedding the seromuscular layer with barbed or 3-0 absorbable sutures. The anastomosis is sutured with an average of six to eight stitches. (2) Laparoscopic surgery: the anastomosis is strengthened by counterclockwise full-layer sutures. Once the anastomosis has been sutured to the right posterior aspect of the anastomosis, the jejunum stump is pulled to the right and the anastomosis turned over to continue to complete reinforcement of the posterior wall. The suture interval is approximately 5 mm. After completing the full-thickness suture, the anastomosis is embedded in the seromuscular layer. Relevant data of patients who had undergone radical gastrectomy in the above 12 centers from June 2021 were collected and analyzed. The primary outcome was safety (e.g., postoperative complications, and treatment). Other studied variables included details of surgery (e.g., surgery time, intraoperative bleeding), postoperative recovery (postoperative time to passing flatus and oral intake, length of hospital stay), and follow-up conditions (quality of life as assessed by Visick scores).Result:[1] From June 2021 to September 2022,457 patients were enrolled, including 355 men and 102 women of median age 60.8±10.1 years and BMI 23.7±3.2 kg/m2. The tumors were located in the upper stomach in 294 patients, mid stomach in 139; and lower stomach in 24. The surgical procedures comprised 48 proximal gastrectomies and 409 total gastrectomies. Neoadjuvant chemotherapy was administered to 85 patients. Other organs were resected in 85 patients. The maximum tumor diameter was 4.3±2.2 cm, number of excised lymph nodes 28.3±15.2, and number of positive lymph nodes five (range one to four. As to pathological stage,83 patients had Stage I disease, 128 Stage II, 237 Stage III, and nine Stage IV. [2] The studied surgery-related variables were as follows: The operation was successfully completed in all patients, 352 via a transabdominal approach, 25 via a transhiatus approach, and 80 via a transthoracoabdominal approach. The whole procedure was performed laparoscopically in 53 patients (11.6%), 189 (41.4%) underwent laparoscopic-assisted surgery, and 215 (47.0%) underwent open surgery. The median intraoperative blood loss was 200 (range, 10–1 350) mL, and the operating time 215.6±66.7 minutes. The anastomotic reinforcement time was 2 (7.3±3.9) minutes for laparoscopic-assisted surgery, 17.6±1.7 minutes for total laparoscopy, and 6.0±1.2 minutes for open surgery. [3] The studied postoperative variables were as follows: The median time to postoperative passage of flatus was 3.1±1.1 days and the postoperative gastrointestinal angiography time 6 (range, 4–13) days. The median time to postoperative oral intake was 7 (range, 2–14) days, and the postoperative hospitalization time 15.8±6.7 days. [4] The safety-related variables were as follows: In total, there were 184 (40.3%) postoperative complications. These comprised esophagojejunal anastomosis complications in 10 patients (2.2%), four (0.9%) being anastomotic leakage (including two cases of subclinical leakage and two of clinical leakage; all resolved with conservative treatment); and six patients (1.3%) with anastomotic stenosis (two who underwent endoscopic balloon dilation 21 and 46 days after surgery, the others improved after a change in diet). There was no anastomotic bleeding. Non-anastomotic complications occurred in 174 patients (38.1%). All patients attended for follow-up at least once, the median follow-up time being 10 (3–18) months. Visick grades were as follows: Class I, 89.1% (407/457); Class II, 7.9% (36/457); Class III, 2.6% (12/457); and Class IV 0.4% (2/457).Conclusion:Double and a half layered esophagojejunal anastomosis in radical gastrectomy is safe and feasible.
9.Denitrifying phosphate accumulating organisms and its mechanism of nitrogen and phosphorus removal.
Chunxia ZHENG ; Cerong WANG ; Manman ZHANG ; Qifeng WU ; Mengping CHEN ; Chenyu DING ; Tengxia HE
Chinese Journal of Biotechnology 2023;39(3):1009-1025
Water eutrophication poses great threats to protection of water environment. Microbial remediation of water eutrophication has shown high efficiency, low consumption and no secondary pollution, thus becoming an important approach for ecological remediation. In recent years, researches on denitrifying phosphate accumulating organisms and their application in wastewater treatment processes have received increasing attention. Different from the traditional nitrogen and phosphorus removal process conducted by denitrifying bacteria and phosphate accumulating organisms, the denitrifying phosphate accumulating organisms can simultaneously remove nitrogen and phosphorus under alternated anaerobic and anoxic/aerobic conditions. It is worth noting that microorganisms capable of simultaneously removing nitrogen and phosphorus absolutely under aerobic conditions have been reported in recent years, but the mechanisms remain unclear. This review summarizes the species and characteristics of denitrifying phosphate accumulating organisms and the microorganisms capable of performing simultaneous nitrification-denitrification and phosphorous removal. Moreover, this review analyzes the relationship between nitrogen removal and phosphorus removal and the underlying mechanisms, discusses the challenges of denitrifying phosphorus removal, and prospects future research directions, with the aim to facilitate process improvement of denitrifying phosphate accumulating organisms.
Phosphorus
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Phosphates
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Wastewater
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Denitrification
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Waste Disposal, Fluid
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Nitrogen
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Bioreactors/microbiology*
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Nitrification
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Sewage