Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 13 de 13
Filter
1.
Chinese Journal of Biotechnology ; (12): 1965-1980, 2022.
Article in Chinese | WPRIM | ID: wpr-927831

ABSTRACT

WRKY is a superfamily of plant-specific transcription factors, playing a critical regulatory role in multiple biological processes such as plant growth and development, metabolism, and responses to biotic and abiotic stresses. Although WRKY genes have been characterized in a variety of higher plants, little is known about them in eukaryotic algae, which are close to higher plants in evolution. To fully characterize algal WRKY family members, we carried out multiple sequence alignment, phylogenetic analysis, and conserved domain prediction to identify the WRKY genes in the genomes of 30 algal species. A total of 24 WRKY members were identified in Chlorophyta, whereas no WRKY member was detected in Rhodophyta, Glaucophyta, or Bacillariophyta. The 24 WRKY members were classified into Ⅰ, Ⅱa, Ⅱb and R groups, with a conserved heptapeptide domain WRKYGQ(E/A/H/N)K and a zinc finger motif C-X4-5-C-X22-23-H-X-H. Haematococcus pluvialis, a high producer of natural astaxanthin, contained two WRKY members (HaeWRKY-1 and HaeWRKY-2). Furthermore, the coding sequences of HaeWRKY-1 and HaeWRKY-2 genes were cloned and then inserted into prokaryotic expression vector. The recombinant vectors were induced to express in Escherichia coli BL21(DE3) cells and the fusion proteins were purified by Ni-NTA affinity chromatography. HaeWRKY-1 had significantly higher expression level than HaeWRKY-2 in H. pluvialis cultured under normal conditions. High light stress significantly up-regulated the expression of HaeWRKY-1 while down-regulated that of HaeWRKY-2. The promoters of HaeWRKY genes contained multiple cis-elements responsive to light, ethylene, ABA, and stresses. Particularly, the promoter of HaeWRKY-2 contained no W-box specific for WRKY binding. However, the W-box was detected in the promoters of HaeWRKY-1 and the key enzyme genes HaeBKT (β-carotene ketolase) and HaePSY (phytoene synthase) responsible for astaxanthin biosynthesis. Considering these findings and the research progress in the related fields, we hypothesized that the low expression of HaeWRKY-2 under high light stress may lead to the up-regulation of HaeWRKY-1 expression. HaeWRKY-1 may then up-regulate the expression of the key genes (HaeBKT, HaePSY, etc.) for astaxanthin biosynthesis, consequently promoting astaxanthin enrichment in algal cells. The findings provide new insights into further analysis of the regulatory mechanism of astaxanthin biosynthesis and high light stress response of H. pluvialis.


Subject(s)
Eukaryota , Gene Expression Regulation, Plant , Phylogeny , Plant Proteins/metabolism , Plants/metabolism , Stress, Physiological/genetics , Transcription Factors/metabolism
2.
Chinese Journal of Biotechnology ; (12): 1260-1276, 2021.
Article in Chinese | WPRIM | ID: wpr-878629

ABSTRACT

The unicellular green alga Haematococcus pluvialis is the best source of natural astaxanthin (AST) in the world due to its high content under stress conditions. Although high light (HL) can effectively induce AST biosynthesis, the specific mechanisms of light signal perception and transduction are unclear. In the current study, we used transcriptomic data of normal (N), high white light (W), and high blue light (B) to study the mechanisms of light inducing AST accumulation from the point of photoreceptors. The original data of 4.0 G, 3.8 G, and 3.6 G for N, W, and B were obtained, respectively, by the Illumina Hi-seq 2000 sequencing technology. Totally, 51 954 unigenes (at least 200 bp in length) were generated, of which, 20 537 unigenes were annotated into at least one database (NR, NT, KO, SwissProt, Pfam, GO, or KOG). There were 1 255 DEGs in the W vs N, 1 494 DEGs in the B vs N, and 1 008 DEGs in the both W vs N and B vs N. KEGG enrichment analysis revealed that photosynthesis, oxidative phosphorylation, carotenoid biosynthesis, fatty acids biosynthesis, DNA replication, nitrogen metabolism, and carbon metabolism were the significantly enriched pathways. Moreover, a large number of genes encoding photoreceptors and predicted interacting proteins were predicted in Haematococcus transcriptome data. These genes showed significant differences at transcriptional expression levels. In addition, 15 related DEGs were selected and tested by qRT-PCR and the results were significantly correlated with the transcriptome data. The above results indicate that the signal transduction pathway of "light signal - photoreceptors - interaction proteins - (interaction proteins - transcription factor/transcriptional regulator) - gene expression - AST accumulation" might play important roles in the regulation process, and provide reference for further understanding the transcriptional regulation mechanisms of AST accumulation under HL stress.


Subject(s)
Chlorophyta/genetics , Gene Expression Profiling , Signal Transduction/genetics , Transcriptome/genetics , Xanthophylls
3.
Journal of Clinical Hepatology ; (12): 115-119, 2021.
Article in Chinese | WPRIM | ID: wpr-862555

ABSTRACT

ObjectiveTo investigate the clinical features of patients with hepatic myelopathy (HM) in China. MethodsThe articles on HM, published in China from January 2009 to December 2018, were collected to analyze the clinical features, laboratory examination results, diagnosis, treatment, and prognosis of HM patients. ResultsA total of 94 articles were included, with 562 patients in total, among whom there were 489 male patients and 73 female patients. Their age ranged from 17-81 years, with a mean age of 46.3±17.5 years. Hepatitis B cirrhosis was the most common etiology (64.4%), followed by alcoholic cirrhosis (10.3%) and hepatitis C cirrhosis (9.2%). The clinical manifestations of HM mainly included decline of muscle strength (89.50%), tendon hyperreflexia (76.87%), ataxia, and movement disorder (76.51%). Laboratory examination showed an increase in blood ammonia by 92.31% and a reduction in albumin by 88.96%. Imaging diagnosis mainly depended on electromyography (64.92%) and spinal cord MRI (22.82%), and abdominal color Doppler ultrasound, CT, or MRI alone has limited clinical value. After comprehensive medical treatment, no patient (0%) was cured, 106 patients (18.86%) were improved, 211 patients (37.54%) had no response, 31 patients (5.52%) worsened, 129 patients (22.95%) died, and 53 patients (9.43%) were not explained. A total of 39 patients underwent liver transplantation, with an improvement rate of 5641%. ConclusionHM is a rare complication of end-stage liver disease and is mainly observed in middle-aged men. It has the main manifestation of chronic and progressive spastic paraplegia of both lower limbs. Currently, there is no effective treatment method, and liver transplantation is feasible for some patients, with poor treatment response and poor prognosis.

4.
Chinese Journal of Digestion ; (12): 162-166, 2020.
Article in Chinese | WPRIM | ID: wpr-871461

ABSTRACT

Objective:To investigate the awareness of digestive system injury caused by coronavirus disease 2019 (COVID-19) in gastroenterologists.Methods:From February 21 to 23 in 2020, the electronic questionnaire was used to learn about the condition of the basic knowledge of COVID-19 and awareness of digestive system injury caused by COVID-19 among the gastroenterologists across the country. Chi-square test was used for statistical analysis.Results:A total of 2 216 gastroenterologists from 31 provinces, autonomous regions and municipalities nationwide completed the survey. 99.7% (2 209/2 216) of gastroenterologists stated that they had read the COVID-19 diagnosis and treatment guidelines. The percentages of physicians who knew clearly about the diagnostic criteria of suspected and confirmed cases of COVID-19 was 34.9% (774/2 216) and 39.4% (874/2 216), respectively. The percentages of physician who gave the right answers of COVID-19 detectable methods and pulmonary imaging was 68.4% (1 516/2 216) and 71.6% (1 586/2 216), respectively. The percentages of correct answers of digestive system injury caused by COVID-19 were physicians and chief physicians was 30.9% (134/433) in residents, 33.9% (234/691) attending physicians, 32.4% (213/657) associated chief physicians and 34.9% (152/435) chief physicians, respectively, however there were no statistically significant differences among physicians with different professional titles ( χ2=6.60, P> 0.05). 95.6% (2 119/2 216) of gastroenterologists believed that probiotics could effectively improve bowel function, and 94.0% (2 082/2 216) of gastroenterologists considered that enteral nutrition support could improve patients’ prognosis. Conclusions:The knowledge and dynamic progress of the digestive system injury caused by COVID-19 are still insufficiently grasped by gastroenterologists in China. So it is necessary to carry out systematic and pertinent training programmes for them.

5.
Chinese Journal of Digestion ; (12): E007-E007, 2020.
Article in Chinese | WPRIM | ID: wpr-811655

ABSTRACT

Objective@#To investigate awareness of digestive system injury caused by corona virus disease 2019 (COVID-19) in gastroenterologists.@*Methods@#From February 21 to 23 in 2020, the electronic questionnaire was sent out to explore the condition of the basic knowledge of COVID-19 and knowledge of digestive system injury caused by COVID-19 grasped by gastroenterologists. Chi-square test was used for statistical analysis.@*Results@#A total of 2 216 gastroenterologists from 31 provinces, autonomous regions and municipalities nationwide completed the survey. 99.7% (2 209/2 216) of gastroenterologists stated that they had read the COVID-19 diagnosis and treatment guidelines. The percentage of physicians who well knew the diagnostic criteria of suspected and confirmed cases of COVID-19 was 34.9% (774/2 216) and 39.4% (874/2 216), respectively. The percentage of physician who gave the right answer of COVID-19 detectable methods and lung imaging was 68.4% (1 516/2 216) and 71.6% (1 586/2 216), respectively. The percentage of correct answer of digestive system injury caused by COVID-19 in residents, attending physicians, associate chief physicians and chief physicians was 30.9% (134/433), 33.9% (234/691), 32.4% (213/657) and 34.9% (152/435), respectively, however there were no statistically significant differences among physicians of different level (χ2=6.60, P> 0.05). 95.6% (2 119/2 216) of gastroenterologists believed that probiotics could effectively improve bowel function, and 94.0% (2 082/2 216) of gastroenterologists considered that enteral nutrition support could improve patients’ prognosis.@*Conclusions@#The knowledge and dynamic progress of the digestive system injury caused of COVID-19 are still insufficiently grasped by gastroenterologists in China. So it is necessary to carry out systematic and pertinent training for them.

6.
Journal of Clinical Hepatology ; (12): 1004-1007, 2020.
Article in Chinese | WPRIM | ID: wpr-821993

ABSTRACT

At present, coronavirus disease 2019 (COVID-19) caused by 2019 novel coronavirus (2019-nCoV) infection has spread rapidly in China and more than 70 countries around the world and thus become a public health event of international concern. In addition to fever and respiratory symptoms, varying degrees of liver injury is also observed after 2019-nCoV infection. This article reviews the clinical features, pathology, pathogenic mechanism, and therapeutic strategies of liver injury associated with COVID-19, hoping to provide a reference for clinical decision-making on the prevention and treatment of COVID-19.

7.
Progress in Modern Biomedicine ; (24): 5365-5368,5361, 2017.
Article in Chinese | WPRIM | ID: wpr-615100

ABSTRACT

Objective:To investigate the clinical efficacy of mechanical solitaire AB stents thrombectomy combined with intra-arterial thrombolysis in the treatment of patient with acute ischemic stroke.Methods:Fifteen patients with acute ischemic stroke admitted into our hospital from August 2014 to August 2016 were treated with mechanical thrombectomy with solitaire AB stents plus intra-arterial thrombolysis.The National Institutes of Health Stroke Scale score (NIHSS) of all patients were evaluated before and after treatment to compare the clinical efficacy.The prognosis ofpatients between two groups were compared via evaluating modified Rankin score (mRS)and gelasijia coma score (GCS).Results:After mechanical thrombectomy with solitaire AB stents plus intra-arterial thrombolysis treatment,14 patients achieved complete or part recanalization,and 1 patient was terminated treatment due to vital signs instability,and the rate ofrecanalization was 93.3%.The NIHSS score of patients before treatment was 12.93± 4.25,which was much higher than that after treatment (4.33± 1.45,P<0.05).After follow-up by 3 months,the good mRS scores were obtained in all 18 patients,including 2 patients with mRS score of 2,5 patients with 1,and 8 patients with 0.Additionally,there was no patient with re-obstruction during follow-up period.Conclusion:Mechanical thrombectomy with solitaire AB stents combined with intra-arterial thrombolysis had a good capability and safety in the treatment of patients with acute ischemic stroke.

8.
Chinese Journal of Digestion ; (12): 462-465, 2017.
Article in Chinese | WPRIM | ID: wpr-612055

ABSTRACT

Objective To explore the clinical characters,treatment and prognosis of gastrointestinal Dieulafoy lesion in China.Methods Dieulafoy was used as search term,the literatures about Chinese patients with Dieulafoy lesions from January 1998 to October 2016 were retrieved in the Chinese literature library including China National Knowledge Infrastructure,VIP network,Wanfang database and China Biology Medicine disc,and a total of 515 literatures,5 145 patients were enrolled and analyzed.The gender,age,geographical distribution,location of the lesion,treatment and prognosis of the disease were summarized.Results Among the 5 145 patients (male 3 959,female 1 186) with Dieulafoy disease,the ratio of male to female was 3.34∶1.00.The age was from 3 to 95 years,and mean age was 51 years.The lesion location was mainly in stomach (88.82%,4 570/5 145) and second was small intestine (8.28%,426/5 145).In stomach,the lesions were mainly located in gastric corpus,fundus and cardia.The small intestinal Dieulafoy lesions were mainly located in duodenum.The main manifests were sudden hematemesis,melena,and hematochezia.The treatments mainly was endoscopic treatment (72.56%,3 733/5 145),and second was surgery (25.27%,1 300/5 145).Among the5 145 patients withDieulafoy disease,5 099 patients (99.11%) were cured and 46 patients (0.89%) died.The proportions of endoscopic treatment,interventional therapy and first endoscopic treatment within 24 hours in tertiary hospitals were all higher than those of nontertiary (all P<0.01).The cure rate of tertiary hospitals (99.22%,3 674/3 793) was significantly higher than that of nontertiary hosptials (98.54%,1 421/1 442) (x2 =0.89,P<0.05) and the mortality was significantly lower than that of nontertiary hospitals (P< 0.05).Conclusions The male is more susceptible to Dieulafoy lesion which occurred at any age than the female in China.The predilection sites of Dieulafoy lesion were stomach and duodenum.The primary treatments were endoscopic treatment and surgery,and the disease usually had a good prognosis.

9.
Article in Chinese | WPRIM | ID: wpr-610685

ABSTRACT

Background:With the deepening of researches on etiology of gastrointestinal bleeding,bleeding caused by pancreatic diseases has been understood better by the clinicians. Upper gastrointestinal bleeding (UGIB)is an uncommon but highly lethal complication of pancreatic diseases. Aims:To analyze the clinical characteristics of UGIB caused by pancreatic diseases for improving the diagnosis and management of this condition. Methods:A total of 22 inpatients who were diagnosed as UGIB caused by pancreatic diseases from Sep. 2010 to Sep. 2016 at Daping Hospital,the Third Military Medical University were recruited and analyzed retrospectively. Results:There were 15 males and 7 females;the disease was more prevalent in young patients than in middle-aged and elderly patients (45. 5% vs. 31. 8% and 22. 7%). The top five causes of bleeding were as follows:stress ulcer related to acute pancreatitis (36. 4%),pancreatic pseudocysts related to chronic pancreatitis (18. 2%),severe acute pancreatitis (13. 6%),post-operative bleeding related to pancreatic surgery (9. 1%)and left-sided portal hypertension (9. 1%). The diagnosis was commonly made by gastroscopy, abdominal contrast-enhanced CT and angiography. Ten patients received medical therapy only,6 were treated by surgical operation,5 by endoscopic hemostasis,and 1 by angioembolization. Hemostasis was achieved in 18 patients (81. 8%), and rebleeding occurred in 4 patients,of which two received medical therapy initially. Two elderly patients died of uncontrollable bleeding and multiple organ failure,respectively. Conclusions:UGIB caused by pancreatic diseases are prone to occur in young and middle-aged males. Pancreatitis and its complications are the major cause of this condition. Medical therapy is ineffective for most of the patients and a multidisciplinary approach of endoscopy,transarterial intervention and surgery is recommended.

10.
Article in Chinese | WPRIM | ID: wpr-607890

ABSTRACT

Background:Esophageal non-variceal hemorrhage is relatively uncommon in clinical,however,it can be life-threatening in severe cases. Thus,retrospective analysis of esophageal non-variceal hemorrhage could provide important evidence for its diagnosis and treatment. Aims:To analyze the clinical characteristics of esophageal non-variceal hemorrhage. Methods:A total of 175 cases of esophageal non-variceal hemorrhage from January 2006 to December 2016 at Daping Hospital were enrolled. Gender,age,cause of bleeding,location of bleeding,season of onset,treatment and prognosis were retrospectively analyzed. Results:The ratio of male to female was 3. 5: 1 in 175 patients with esophageal non-variceal hemorrhage,73. 1% of patients were middle-aged and elderly. The main cause of bleeding of esophageal non-variceal hemorrhage were cardiac mucosal laceration syndrome (46. 9%),esophageal cancer (23. 4%),esophageal ulcer (12. 6%)and esophageal foreign body (12. 0%). The most common site of bleeding was lower esophagus (70. 9%). Fifty-one patients accepted endoscopic treatment or surgery. After treatment,142 patients (81. 1%)were cured or improved,and death was occurred in 27 patients (15. 4%). Conclusions:The incidence of esophageal non-variceal hemorrhage is higher in male than in female,and is commonly seen in middle-aged and elderly patients. The most common cause of bleeding of esophageal non-variceal hemorrhage is cardiac mucosal laceration syndrome,and the most common site of bleeding is lower esophagus. Medicine combined with endoscopic treatment is effective for most of the patients.

11.
Article in Chinese | WPRIM | ID: wpr-607509

ABSTRACT

Background:Small intestinal bleeding is difficult to diagnose and treat because of its complex etiology and limit to examination method. Aims:To analyze the etiology,diagnosis,treatment and prognosis of small intestinal bleeding. Methods:The clinical data of 118 consecutive patients with small intestinal bleeding admitted from Oct. 2006 to Oct. 2016 at Daping Hospital,the Third Military Medical University were retrospectively analyzed. Results:Melena was the most common manifestation of small intestinal bleeding (41. 5%),followed by dark bloody stool,positive fecal occult blood test,hematochezia,and anemia with unknown cause. The major causes of bleeding were benign or malignant tumors (43. 2%),vascular lesions (28. 0%)and inflammatory lesions (15. 3%). Diagnosis was made by means of capsule endoscopy,colonoscopy,digital subtraction angiography (DSA),barium meal examination,multi-slice CT (MSCT)and CT enterography (CTE). Forty-one patients were treated by surgical operation,7 by selective arterial embolization,2 by endoscopic therapy,56 by conservative therapy,and all these patients achieved hemostasis. One patient died of massive hemorrhage and 11 were discharged with giving up of treatment. Conclusions:The leading cause of small intestinal bleeding is tumor,followed by vascular and inflammatory lesions. Capsule endoscopy is able to make definite diagnosis with high accuracy,and MSCT is the most widely used diagnostic approach. In addition to conventional treatment,surgical operation,interventional and endoscopic therapies also play important roles in treating small intestinal bleeding.

12.
Chongqing Medicine ; (36): 2641-2643, 2015.
Article in Chinese | WPRIM | ID: wpr-465333

ABSTRACT

Objective To compare the safety and clinical efficacy between paclitaxel liposomes and paclitaxel in patients with advanced esophageal cancer .Methods A total of 90 patients with advanced esophageal cancer were enrolled into this study and were randomly divided into paclitaxel liposomes treatment group(treatment group) and paclitaxel treatment group(control group) . The patients of each group were treated with paclitaxel liposomes or paclitaxel 80 mg/m2 intravenously on day 1 and 8 ,and nedapla‐tin 75 mg/m2 intravenously on day 1 ,respectively .After two cycles of chemotherapy ,three weeks per period ,we evaluated the short term efficacy and adverse reactions according to the WHO standard .Results The short term efficacy between control group and treatment group showed no significance statistically (P>0 .05) .However ,the incidence of allergic reactions in the treatment group was significantly lower than control group (P<0 .05) .Conclusion Paclitaxel liposomal or paclitaxel combine with nedaplatin was effective equivalently in the treatment of patients with advanced esophageal cancer .But the allergic reactions of paclitaxel liposomal were lower than paclitaxel .It is worthy of clinical promotion .

13.
International Journal of Surgery ; (12): 758-762, 2014.
Article in Chinese | WPRIM | ID: wpr-466957

ABSTRACT

Objective To investigate the related risk factors caused the retained common bile duct (CBD)stones after laparoscopic cholecystectomy,to provide the evidence for preventing from retained common bile duct stones of laparoscopic cholecystectomy.Methods Selected 654 cases of laparoscopic cholecystectomy patients as the objects whom hospitalized in Beijing Chuiyongliu Hospital from January 2002 to June 2013.All cases were divided into the group of retained CBD stones (27cases) and the group of non-retained CBD stones (627 cases).Collected the potentially relevant factors of two groups with the retained CBD stones,including medical history of jaundice and pancreatitis,common bile duct internal diameter (B Ultrasound) ≥ 8 mm,acute cholecystitis,emergency surgery,gallbladder removal order,calot triangle adhesion,sludge calculus,stones neck incarcerated,fulltype stones,cystic duct thickening,cystic duct reserved≥ 1 cm,the minimum diameter stones ≤5 mm,the number of gallbladder stones ≥ 5,partial cholecystectomy,purulent bile.Statistics analyses was proceeded using the IBM SPSS 20.0.Result Through dichotomy logistic regression analysis to the univariate analysis results with statistical significance,sorted the results according to the influence degree,found the independent risk factors:common bile duct internal diameter (B Ultrasound) ≥8 mm,gallbladder removal order (retrograde removal),medical history of jaundice pancreatitis,cystic duct reserved ≥ 1 cm,sludge calculus,in total of 5 indexes,which caused the retained CBD stones after laparoscopic cholecystectomy.Conclusion There are several independent risk factors for retained CBD stoes after LC such as medical history of jaundice and pancreatitis,common bile duct internal diameter (B Ultrasound) ≥ 8 mm,the order of cholecystectomy (retrograde remoral),shudeg calculus and the remaining length of bile duct ≥ 1 cm.The surgeons should pay close attention to them and take appropriate measures in the preoperation and intraoperation of LC,which contribute to preventing the acurence of postoperative retaimed CBD stone.

SELECTION OF CITATIONS
SEARCH DETAIL