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Jiang SY, Yang CZ, Tian XY, Chen DM, Yang ZM, Shi JY, Xu FL, Mo Y, Gu XY, Lee K, Zhou WH, Cao Y. [Outcomes and care practices of extremely preterm infants at 22-25 weeks' gestation age from the Chinese Neonatal Network]. Zhonghua Er Ke Za Zhi 2024; 62:22-28. [PMID: 38154973 DOI: 10.3760/cma.j.cn112140-20231017-00296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
Objective: To describe the current status and trends in the outcomes and care practices of extremely preterm infants at 22-25 weeks' gestation age from the Chinese Neonatal Network (CHNN) from 2019 to 2021. Methods: This cross-sectional study used data from the CHNN cohort of very preterm infants. All 963 extremely preterm infants with gestational age between 22-25 weeks who were admitted to neonatal intensive care units (NICU) of the CHNN from 2019 to 2021 were included. Infants admitted after 24 hours of life or transferred to non-CHNN hospitals were excluded. Perinatal care practices, survival rates, incidences of major morbidities, and NICU treatments were described according to different gestational age groups and admission years. Comparison among gestational age groups was conducted using χ2 and Kruskal-Wallis tests. Trends by year were evaluated by Cochran-Armitage and Jonckheere-Terpstra tests for trend. Results: Of the 963 extremely preterm infants enrolled, 588 extremely preterm infants (61.1%) were male. The gestational age was 25.0 (24.4, 25.6) weeks, with 29 extremely preterm infants (3.0%), 88 extremely preterm infants (9.1%), 264 extremely preterm infants (27.4%), and 582 extremely preterm infants (60.4%) at 22, 23, 24, and 25 weeks of gestation age, respectively. The birth weight was 770 (680, 840) g. From 2019 to 2021, the number of extremely preterm infants increased each year (285, 312, and 366 extremely preterm infants, respectively). Antenatal steroids and magnesium sulfate were administered to 67.7% (615/908) and 51.1% (453/886) mothers of extremely preterm infants. In the delivery room, 20.8% (200/963) and 69.5% (669/963) extremely preterm infants received noninvasive positive end-expiratory pressure support and endotracheal intubation. Delayed cord clamping and cord milking were performed in 19.0% (149/784) and 30.4% (241/794) extremely preterm infants. From 2019 to 2021, there were significant increases in the usage of antenatal steroids, antenatal magnesium sulfate, and delivery room noninvasive positive-end expiratory pressure support (all P<0.05). Overall, 349 extremely preterm infants (36.2%) did not receive complete care, 392 extremely preterm infants (40.7%) received complete care and survived to discharge, and 222 extremely preterm infants (23.1%) received complete care but died in hospital. The survival rates for extremely preterm infants at 22, 23, 24 and 25 weeks of gestation age were 10.3% (3/29), 23.9% (21/88), 33.0% (87/264) and 48.3% (281/582), respectively. From 2019 to 2021, there were no statistically significant trends in complete care, survival, and mortality rates (all P>0.05). Only 11.5% (45/392) extremely preterm infants survived without major morbidities. Moderate to severe bronchopulmonary dysplasia (67.3% (264/392)) and severe retinopathy of prematurity (61.5% (241/392)) were the most common morbidities among survivors. The incidences of severe intraventricular hemorrhage or periventricular leukomalacia, necrotizing enterocolitis, and sepsis were 15.3% (60/392), 5.9% (23/392) and 19.1% (75/392), respectively. Overall, 83.7% (328/392) survivors received invasive ventilation during hospitalization, with a duration of 22 (10, 42) days. The hospital stay for survivors was 97 (86, 116) days. Conclusions: With the increasing number of extremely preterm infants at 22-25 weeks' gestation admitted to CHNN NICU, the survival rate remained low, especially the rate of survival without major morbidities. Further quality improvement initiatives are needed to facilitate the implementation of evidence-based care practices.
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Affiliation(s)
- S Y Jiang
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - C Z Yang
- Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen 518000, China
| | - X Y Tian
- Department of Neonatology, Nankai University Maternity Hospital, Tianjin Central Hospital of Gynecology Obstetrics, Tianjin 300199,China
| | - D M Chen
- Department of Neonatology, Quanzhou Women's and Children's Hospital, Quanzhou 362017,China
| | - Z M Yang
- Department of Neonatology, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215001,China
| | - J Y Shi
- Department of Neonatology, Gansu Provincial Central Hospital, Gansu Provincial Maternity and Child Care Hospital, Lanzhou 730050, China
| | - F L Xu
- Department of Pediatrics, the Third Affiliated Hospital of Zhengzhou University (Maternal and Child Health Hospital of Henan Province), Zhengzhou 450052, China
| | - Y Mo
- Neonatal Medical Center, the Children's Hospital of Guangxi Zhuang Autonomous Region, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530005, China
| | - X Y Gu
- National Health Commission (NHC) Key Laboratory of Neonatal Diseases, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - K Lee
- the Maternal Infant Care Research Center (MiCARE), Mount Sinai Hospital, Toronto M5G 1X5, Canada
| | - W H Zhou
- Division of Neonatology and Center for Newborn Care, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - Y Cao
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
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Zhu L, Jin ML, He SR, Xu HM, Huang JW, Kong LF, Li DH, Hu JX, Wang XY, Jin YW, He H, Wang XY, Song YY, Wang XQ, Yang ZM, Hu AX. [Application and evaluation of artificial intelligence TPS-assisted cytologic screening system in urine exfoliative cytology]. Zhonghua Bing Li Xue Za Zhi 2023; 52:1223-1229. [PMID: 38058038 DOI: 10.3760/cma.j.cn112151-20230831-00115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Objective: To explore the application of manual screening collaborated with the Artificial Intelligence TPS-Assisted Cytologic Screening System in urinary exfoliative cytology and its clinical values. Methods: A total of 3 033 urine exfoliated cytology samples were collected at the Henan People's Hospital, Capital Medical University, Beijing, China. Liquid-based thin-layer cytology was prepared. The slides were manually read under the microscope and digitally presented using a scanner. The intelligent identification and analysis were carried out using an artificial intelligence TPS assisted screening system. The Paris Report Classification System of Urinary Exfoliated Cytology 2022 was used as the evaluation standard. Atypical urothelial cells and even higher grade lesions were considered as positive when evaluating the recognition sensitivity, specificity, and diagnostic accuracy of artificial intelligence-assisted screening systems and human-machine collaborative cytologic screening methods in urine exfoliative cytology. Among the collected cases, there were also 1 100 pathological tissue controls. Results: The accuracy, sensitivity and specificity of the AI-assisted cytologic screening system were 77.18%, 90.79% and 69.49%; those of human-machine coordination method were 92.89%, 99.63% and 89.09%, respectively. Compared with the histopathological results, the accuracy, sensitivity and specificity of manual reading were 79.82%, 74.20% and 95.80%, respectively, while those of AI-assisted cytologic screening system were 93.45%, 93.73% and 92.66%, respectively. The accuracy, sensitivity and specificity of human-machine coordination method were 95.36%, 95.21% and 95.80%, respectively. Both cytological and histological controls showed that human-machine coordination review method had higher diagnostic accuracy and sensitivity, and lower false negative rates. Conclusions: The artificial intelligence TPS assisted cytologic screening system has achieved acceptable accuracy in urine exfoliation cytologic screening. The combination of manual screening and artificial intelligence TPS assisted screening system can effectively improve the sensitivity and accuracy of cytologic screening and reduce the risk of misdiagnosis.
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Affiliation(s)
- L Zhu
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
| | - M L Jin
- Department of Pathology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - S R He
- Department of Pathology, Beijing Hospital, Beijing 100730, China
| | - H M Xu
- Department of Pathology, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - J W Huang
- Department of Pathology, Luoyang Central Hospital, Luoyang 471000, China
| | - L F Kong
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
| | - D H Li
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
| | - J X Hu
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
| | - X Y Wang
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
| | - Y W Jin
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
| | - H He
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
| | - X Y Wang
- iDeepwise Artificial Intelligence Robot Technology (Beijing) Limited Company, Beijing 100089, China
| | - Y Y Song
- iDeepwise Artificial Intelligence Robot Technology (Beijing) Limited Company, Beijing 100089, China
| | - X Q Wang
- iDeepwise Artificial Intelligence Robot Technology (Beijing) Limited Company, Beijing 100089, China
| | - Z M Yang
- iDeepwise Artificial Intelligence Robot Technology (Beijing) Limited Company, Beijing 100089, China
| | - A X Hu
- Department of Pathology, Henan People's Hospital/Zhengzhou University People's Hospital; Zhengzhou 450003, China
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Yang ZM, Huang J, Chen XM, Meng X, Qiu Y, Zeng W, Zhang JQ. [Advances in clinical characteristics of talaromycosis combined with other opportunistic infections]. Zhonghua Jie He He Hu Xi Za Zhi 2023; 46:503-506. [PMID: 37147814 DOI: 10.3760/cma.j.cn112147-20220807-00659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Talaromycosis (TSM) is an opportunistic deep mycosis prevalent in southeast Asia and southern China, affecting HIV-positive, anti-interferon-gamma autoantibody-positive and other immunodeficiency hosts. These hosts are often co-infected with mycobacterium tuberculosis, non-tuberculosis mycobacteria, bacteria, fungi, viruses and other opportunistic infections. The clinical characteristics and the pathogenic spectrum of TSM with opportunistic infections vary with different immune states. The rates of misdiagnosis, missed diagnosis and mortality are high. This review summarized the clinical characteristics of TSM with opportunistic infections in order to improve the level of clinical diagnosis and treatment.
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Affiliation(s)
- Z M Yang
- Department of Respiratory and Critical Medicine, the Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, China
| | - J Huang
- Department of Respiratory and Critical Care Medicine, the Fourth People's Hospital of Nanning, Nanning 530002, China
| | - X M Chen
- Department of Respiratory and Critical Medicine, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - X Meng
- Department of Respiratory and Critical Medicine, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Y Qiu
- Department of Respiratory and Critical Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
| | - W Zeng
- Department of Respiratory and Critical Medicine, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - J Q Zhang
- Department of Respiratory and Critical Medicine, the Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, China
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Cao XC, Jiang SY, Li SJ, Han JY, Zhou Q, Li MM, Bai RM, Xia SW, Yang ZM, Ge JF, Zhang BQ, Yang CZ, Yuan J, Pan DD, Shi JY, Hu XF, Lin ZL, Wang Y, Zeng LC, Zhu YP, Wei QF, Guo Y, Chen L, Liu CQ, Jiang SY, Li XY, Sun HQ, Qi YJ, Hei MY, Cao Y. [Status of fungal sepsis among preterm infants in 25 neonatal intensive care units of tertiary hospitals in China]. Zhonghua Er Ke Za Zhi 2023; 61:29-35. [PMID: 36594118 DOI: 10.3760/cma.j.cn112140-20220918-00813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Objective: To analyze the prevalence and the risk factors of fungal sepsis in 25 neonatal intensive care units (NICU) among preterm infants in China, and to provide a basis for preventive strategies of fungal sepsis. Methods: This was a second-analysis of the data from the "reduction of infection in neonatal intensive care units using the evidence-based practice for improving quality" study. The current status of fungal sepsis of the 24 731 preterm infants with the gestational age of <34+0 weeks, who were admitted to 25 participating NICU within 7 days of birth between May 2015 and April 2018 were retrospectively analyzed. These preterm infants were divided into the fungal sepsis group and the without fungal sepsis group according to whether they developed fungal sepsis to analyze the incidences and the microbiology of fungal sepsis. Chi-square test was used to compare the incidences of fungal sepsis in preterm infants with different gestational ages and birth weights and in different NICU. Multivariate Logistic regression analysis was used to study the outcomes of preterm infants with fungal sepsis, which were further compared with those of preterm infants without fungal sepsis. The 144 preterm infants in the fungal sepsis group were matched with 288 preterm infants in the non-fungal sepsis group by propensity score-matched method. Univariate and multivariate Logistic regression analysis were used to analyze the risk factors of fungal sepsis. Results: In all, 166 (0.7%) of the 24 731 preterm infants developed fungal sepsis, with the gestational age of (29.7±2.0) weeks and the birth weight of (1 300±293) g. The incidence of fungal sepsis increased with decreasing gestational age and birth weight (both P<0.001). The preterm infants with gestational age of <32 weeks accounted for 87.3% (145/166). The incidence of fungal sepsis was 1.0% (117/11 438) in very preterm infants and 2.0% (28/1 401) in extremely preterm infants, and was 1.3% (103/8 060) in very low birth weight infants and 1.7% (21/1 211) in extremely low birth weight infants, respectively. There was no fungal sepsis in 3 NICU, and the incidences in the other 22 NICU ranged from 0.7% (10/1 397) to 2.9% (21/724), with significant statistical difference (P<0.001). The pathogens were mainly Candida (150/166, 90.4%), including 59 cases of Candida albicans and 91 cases of non-Candida albicans, of which Candida parapsilosis was the most common (41 cases). Fungal sepsis was independently associated with increased risk of moderate to severe bronchopulmonary dysplasia (BPD) (adjusted OR 1.52, 95%CI 1.04-2.22, P=0.030) and severe retinopathy of prematurity (ROP) (adjusted OR 2.55, 95%CI 1.12-5.80, P=0.025). Previous broad spectrum antibiotics exposure (adjusted OR=2.50, 95%CI 1.50-4.17, P<0.001), prolonged use of central line (adjusted OR=1.05, 95%CI 1.03-1.08, P<0.001) and previous total parenteral nutrition (TPN) duration (adjusted OR=1.04, 95%CI 1.02-1.06, P<0.001) were all independently associated with increasing risk of fungal sepsis. Conclusions: Candida albicans and Candida parapsilosis are the main pathogens of fungal sepsis among preterm infants in Chinese NICU. Preterm infants with fungal sepsis are at increased risk of moderate to severe BPD and severe ROP. Previous broad spectrum antibiotics exposure, prolonged use of central line and prolonged duration of TPN will increase the risk of fungal sepsis. Ongoing initiatives are needed to reduce fungal sepsis based on these risk factors.
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Affiliation(s)
- X C Cao
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - S Y Jiang
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - S J Li
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - J Y Han
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Q Zhou
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - M M Li
- Department of Neonatology, Women's Hospital of Nanjing Medical University, Nanjing 210004, China
| | - R M Bai
- Department of Neonatology, Northwest Women's and Children's Hospital, Xi'an 200001, China
| | - S W Xia
- Department of Neonatology, Maternal and Child Hospital of Hubei Province, Wuhan 430064, China
| | - Z M Yang
- Department of Neonatology, Suzhou Municipal Hospital, Suzhou 215008, China
| | - J F Ge
- Department of Neonatology, Shanxi Children's Hospital, Taiyuan 030006, China
| | - B Q Zhang
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Fuzhou 350005, China
| | - C Z Yang
- Department of Neonatology, the Affiliated Shenzhen Maternity and Child Healthcare Hospital of Southern Medical University, Shenzhen 518047, China
| | - J Yuan
- Department of Neonatology, Qingdao Women and Children's Hospital, Qingdao 266011, China
| | - D D Pan
- Department of Neonatology, Guiyang Maternal and Child Health Care Hospital, Guiyang Children's Hospital, Guiyang 550002, China
| | - J Y Shi
- Department of Neonatology, Gansu Provincial Maternity and Child-care Hospital, Lanzhou 730050, China
| | - X F Hu
- Department of Neonatology, Shanghai First Maternal and Infant Hospital, Shanghai 201204, China
| | - Z L Lin
- Department of Neonatology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325088, China
| | - Y Wang
- Department of Neonatology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - L C Zeng
- Department of Neonatology, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - Y P Zhu
- Department of Neonatology, the First Affiliated Hospital of Xinjiang Medical University, Urumchi 830054, China
| | - Q F Wei
- Department of Neonatology, Maternity and Child Health Care of Guangxi Zhuang Autonomous Region, Nanning 530002, China
| | - Y Guo
- Department of Neonatology, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - L Chen
- Department of Neonatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430014, China
| | - C Q Liu
- Department of Neonatology, Children's Hospital of Hebei Province, Shijiazhuang 050031, China
| | - S Y Jiang
- Department of Neonatology, Wuxi Maternal and Child Health Care Hospital, Wuxi 214002, China
| | - X Y Li
- Department of Neonatology, Children's Hospital Affiliated to Shandong University, Jinan Children's Hospital, Jinan 250022, China
| | - H Q Sun
- Division of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou 450018, China
| | - Y J Qi
- Department of Neonatology, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - M Y Hei
- Department of Neonatology, the Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Y Cao
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
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Song YY, Tang L, Xia L, Hao RM, Yang ZM. [Evaluation considerations for using surrogate endpoints in anticancer clinical trials]. Zhonghua Zhong Liu Za Zhi 2022; 44:1155-1159. [PMID: 36380663 DOI: 10.3760/cma.j.cn112152-20210913-00697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The prolongation of patient's overall survival is the accepted as gold standard to prove clinical values of anti-cancer drugs. However, if overall survival is taken as the primary endpoint in clinical trials for cancer types with a relatively good prognosis in the process of new anti-cancer drug research and development, the time to market the drugs will be prolonged due to the long follow-up time. In addition, overall survival is often interfered by confounding factors such as follow-up treatment. Therefore, regulatory agencies have established an accelerated review model using surrogate endpoints for the approval of new anti-cancer drugs, but there are still some problems in the use of surrogate endpoints in cancer clinical trials. From the perspective of new drug review, the authors expounds the key points of confirming and rationally using surrogate endpoints in clinical trials of anti-cancer drugs, which will improve the level of clinical trials of new anti-cancer drugs and accelerate the development of anti-tumor drugs.
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Affiliation(s)
- Y Y Song
- Center for Drug Evaluation, National Medical Products Administration, Beijing 100022, China
| | - L Tang
- Center for Drug Evaluation, National Medical Products Administration, Beijing 100022, China
| | - L Xia
- Center for Drug Evaluation, National Medical Products Administration, Beijing 100022, China
| | - R M Hao
- Center for Drug Evaluation, National Medical Products Administration, Beijing 100022, China
| | - Z M Yang
- Center for Drug Evaluation, National Medical Products Administration, Beijing 100022, China
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Luo MJ, Wang Y, Chen SY, Yang ZM. Astragalus Polysaccharides Alleviate Type 2 Diabetic Rats by Reversing the Expressions of Sweet Taste Receptors and Genes Related to Glycolipid Metabolism in Liver. Front Pharmacol 2022; 13:916603. [PMID: 36059978 PMCID: PMC9428788 DOI: 10.3389/fphar.2022.916603] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 06/20/2022] [Indexed: 11/13/2022] Open
Abstract
Sweet taste receptors (STRs) play an important role in glucose metabolism, and type 2 diabetic rats have abnormal expressions of STRs in multiple tissues. Astragalus polysaccharides (APS) has shown a significant therapeutic effect on type 2 diabetes mellitus (T2DM), but its mechanism needs to be further clarified. T2DM rat model was induced by intraperitoneal streptozotocin injection and treated with APS for 8 weeks. Daily indicators of experimental rats were observed, and expression levels of STRs and genes related to glycolipid metabolism were determined by real-time quantitative PCR and western blot. The present study revealed that APS alleviated the symptoms of T2DM rats, improved HOMA-IR and promoted insulin secretion. Gene expression analysis found that APS significantly increased the expressions of signaling molecules in STRs pathways, including taste receptor family 1 member 2 (T1R2), α-gustducin (Gα) and transient receptor potential cation channel subfamily member 5 (TRPM5), and reversed the expressions of genes related to glucolipid metabolism, including glucose transporters 2 and 4 (GLUT2 and GLUT4), pyruvate carboxylase (PC), fatty acid synthase (FAS) and acetyl-CoA carboxylase (ACC) in the liver of T2DM rats. However, APS had no influences on the expressions of genes, including glycogen synthase kinase-3 beta (GSK-3β), pyruvate kinase (PK) and phosphoenolpyruvate carboxykinase (PEPCK) in the liver of T2DM rats. These results suggested that the physiological roles of STRs in the liver were involved with glucose transport and metabolism. APS alleviated T2DM rats by activating the STRs pathway, and promoted glucose transport and lipogenesis.
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Tang L, Zhou M, Xia L, Hao RM, Tong X, Chen DM, Song YY, Zhao X, Zhang H, Hu WJ, Zou LM, Du Y, Qi YL, Chen XM, Yang ZM. [Rethinking the marketing strategy of anti-tumor drugs by single-arm trials supported]. Zhonghua Zhong Liu Za Zhi 2022; 44:587-592. [PMID: 35754235 DOI: 10.3760/cma.j.cn112152-20210513-00376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Single-arm trial refers to a clinical trial design that does not set up parallel control group, adopts open design, and does not involve randomization and blind method. These features, on the one hand, speed up the process of clinical trials, significantly shorten the time to market and meet the needs of patients with advanced malignancies, but also lead to the uncertainty of single-arm clinical trials themselves. Recently, the US Food and Drug Administration held a meeting of the oncologic drug advisory committee to discuss six tumor indications that have been accelerated approved, which once again triggered the discussion of single-arm trials. The basis of accelerated approval by single-arm trial is actually a compromise on the level of evidence-based medical evidence requirements after assessing the benefit risk. Therefore, the sponsor should strictly grasp the applicable conditions of single-arm trial in anti-tumor drugs and conduct single-arm trial scientifically. Post-marketing clinical trial should be implement as early as possible to ensure the benefit of patients. Based on the characteristics of single-arm trial, combined with two guidance relevant to single-arm trial issued by National Medical Products Administration recently, this article is supposed to propose and summarize the strategy of single-arm trial supporting the marketing of anti-tumor drugs.
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Affiliation(s)
- L Tang
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - M Zhou
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - L Xia
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - R M Hao
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - X Tong
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - D M Chen
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - Y Y Song
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - X Zhao
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - H Zhang
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - W J Hu
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - L M Zou
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - Y Du
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - Y L Qi
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - X M Chen
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
| | - Z M Yang
- Center for Drug Evaluation, National Medical Products Administration of China, Beijing 100022, China
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Xu LC, Cao J, Li WJ, Yang ZM, Zhao R, Zhang JR, Guo Y, Ge JC, Li L, Sun YN, Liu M, Tian LL. [Ferroptosis in laryngeal squamous cell carcinoma and its regulation by M2 macrophage-derived exosomes]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:324-332. [PMID: 35325945 DOI: 10.3760/cma.j.cn115330-20210621-00361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To investigate ferroptosis in laryngeal squamous cell carcinoma (LSCC) and its regulation by M2 macrophage-derived exosomes. Methods: LSCC and adjacent noncancerous tissue samples were collected from 32 patients treated in the Department of Otorhinolaryngology, Head and Neck Surgery of the Second Affiliated Hospital of Harbin between September 2018 and April 2021, including 26 males and 6 females, aged 43-79 years. The expressions of ferroptosis marker glutathione peroxidase 4(GPX4) in LSCC and adjacent noncancerous tissues were detected by immunohistochemistry and reverse transcriptase-polymerase chain reaction(RT-PCR). The correlations between GPX4 expression and clinicopathological factors in LSCC were analyzed. Biological changes of TU212 cells after treated with ferroptosis-induced agent erastin were detected by transmission electron microscope, cell counting kit-8(CCK-8), clone test, reactive oxygen species(ROS), malondialdehyde(MDA), glutathione(GSH), JC-1, RT-PCR and western blot. Exosomes were isolated from the supernatant of M0/M2 macrophages (M0-exos/M2-exos) and co-incubated with erastin-treated TU212 cells to detect the change of ferroptosis in cells of each group. The data were analyzed by SPSS software of version19.0. Results: GPX4 expression in LSCC tissues was significantly higher than that in adjacent noncancerous tissues (2.04±0.65 vs. 0.99±0.09, F=30.36, P<0.001), and was closely related to T stage and clinical stage (Ⅰ-Ⅱvs.Ⅲ-Ⅳ: 1.75±0.39 vs. 2.18±0.71, F=2.25, P<0.05; T1-2 vs. T3-4: 1.71±0.42 vs. 2.20±0.69, F=2.06, P<0.05). In TU212 cells treated with erastin, mitochondrial crest became smaller, membrane density increased, proliferation rate decreased, intracellular ROS level increased, mitochondrial membrane potential depolarized, GSH content decreased, intracellular MDA level increased and expressions of GPX4 mRNA and protein decreased. Change of M0 into M2 macrophages was induced by IL-4 stimulation. When erastin-treated TU212 cells were incubated with M2-exos, cell proliferation was partially restored and GPX4 expression was enhanced, and also with the recoveries of levels of ROS, MDA and GSH (all P<0.05). Conclusions: Ferroptosis is one of the cell death ways of LSCC. M2-exos may inhibit ferroptosis of LSCC cells.
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Affiliation(s)
- L C Xu
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - J Cao
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - W J Li
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Z M Yang
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - R Zhao
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - J R Zhang
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Y Guo
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - J C Ge
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - L Li
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Y N Sun
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - M Liu
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - L L Tian
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
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Bao JJ, Li TZ, Yang ZM, Zhu Y, Lu JM, Shen P, Lin HB, Chen K, Wang JB. [Association of high-density lipoprotein cholesterol with risk of cardiovascular disease mortality]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:1461-1467. [PMID: 34963244 DOI: 10.3760/cma.j.cn112150-20201217-01458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To analyze the association between high density lipoprotein cholesterol (HDL-C) and the risk of cardiovascular disease mortality. Methods: A total of 71 618 residents aged over 18 years with complete baseline data, who were filed on the health information big data platform of Yinzhou district, Ningbo city, Zhejiang Province from 2009 to 2014, were selected as the research population. The research population were divided into four groups according to the level of HDL-C: low-level group (HDL-C<1.0 mmol/L), intermediate-level group (1.0 mmol/L≤HDL-C<1.5 mmol/L), medium-high-level group (1.5 mmol/L≤HDL-C<2.0 mmol/L) and high-level group (HDL-C≥2.0 mmol/L). Cox proportional hazard model was used to calculate the risk ratio of cardiovascular diseases mortality in different groups. Results: The study population was followed up for a total of 427 989.4 person-years, follow-up time of (5.98±1.04)years. During the follow-up period, there were 799 deaths due to cardiovascular diseases. After adjusting for confounding factors, compared with the medium-high-level group as the reference group, the HR (95%CI) for cardiovascular diseases mortality was 1.43 (1.13-1.82) in the low-level group and 1.22 (1.02-1.46) in the high-level group. Conclusion: The low level of HDL-C (<1.5 mmol/L) is associated with a higher risk of cardiovascular disease deaths. The level of HDL-C can be used as a biological indicator to monitor the development of cardiovascular diseases and guide treatment.
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Affiliation(s)
- J J Bao
- School of Public Health, Zhejiang University, Hangzhou 310058, China Yuecheng District Center for Disease Control and Prevention, Shaoxing 312000, China
| | - T Z Li
- School of Public Health, Zhejiang University, Hangzhou 310058, China
| | - Z M Yang
- School of Public Health, Zhejiang University, Hangzhou 310058, China
| | - Y Zhu
- School of Public Health, Zhejiang University, Hangzhou 310058, China
| | - J M Lu
- School of Public Health, Zhejiang University, Hangzhou 310058, China
| | - P Shen
- Yinzhou District Center for Disease Control and Prevention, Ningbo 315100, China
| | - H B Lin
- Yinzhou District Center for Disease Control and Prevention, Ningbo 315100, China
| | - K Chen
- School of Public Health, Zhejiang University, Hangzhou 310058, China Cancer Institute, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - J B Wang
- School of Public Health, Zhejiang University, Hangzhou 310058, China National Clinical Research Center for Child Health, the Children's Hospital, Zhejiang University School of Medicine, Hangzhou 310052, China
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Qiu ZK, Liu ZT, Pang JL, Wu HB, Liu X, Yang ZM, Li X, Chen JS. A network pharmacology study with molecular docking to investigate the possibility of licorice against posttraumatic stress disorder. Metab Brain Dis 2021; 36:1763-1777. [PMID: 34417940 DOI: 10.1007/s11011-021-00816-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 08/02/2021] [Indexed: 02/08/2023]
Abstract
Post traumatic stress disorder (PTSD) is a mental health condition that has a debilitating effect on a person's quality of life and leads to a high socioeconomic burden. Licorice has been demonstrated to have neuroprotective and antidepressant-like effects, but little is known about its effects for the treatment of PTSD. The present study aimed to explore the potential of licorice for PTSD therapy using a network pharmacology approach with molecular docking studies. The compounds of licorice were obtained from databases with screening by absorption, distribution, metabolism and excretion (ADME) evaluation. Genes associated with compounds or PTSD were obtained from public databases, and the genes overlapping between licorice compounds and PTSD were compared by Venn diagram. A network of medicine-ingredients-targets-disease was constructed, visualized, and analyzed using cytoscape software. Protein-protein interactions, gene ontology, pathway enrichment and molecular docking were performed to evaluate the effect of licorice for the treatment of PTSD. 69 potential compounds were screened after ADME evaluation. A total of 81 compound-related genes and 566 PTSD-related genes were identified in the databases with 27 overlapping genes. Licorice compounds (e.g., medicarpin, 7-methoxy-2-methyl isoflavone, shinpterocarpin, formononetin, licochalcone a) and target proteins (e.g., ESR1, PTGS2, NOS2, and ADRB2) with high degree in the network were involved in G protein-coupled receptor signaling pathways at the postsynaptic/synaptic membrane. Moreover, neuroactive ligand-receptor interactions, calcium signaling, cholinergic synapse, serotonergic synapse and adrenergic signaling in cardiomyocytes may play important roles in the treatment of PTSD by licorice. This study provides molecular evidence of the beneficial effects of licorice for the treatment of PTSD.
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Affiliation(s)
- Zhi-Kun Qiu
- Pharmaceutical Department, The First Affiliated Hospital of Guangdong Pharmaceutical University, 510080, Guangzhou, People's Republic of China
| | - Zhi-Ting Liu
- Guangdong Pharmaceutical University, Guangzhou, 510006, People's Republic of China
| | - Jia-Li Pang
- Pharmaceutical Department, The First Affiliated Hospital of Guangdong Pharmaceutical University, 510080, Guangzhou, People's Republic of China
| | - Han-Biao Wu
- Pharmaceutical Department, The First Affiliated Hospital of Guangdong Pharmaceutical University, 510080, Guangzhou, People's Republic of China
| | - Xu Liu
- Medical Supplies Center of Chinese, PLA General Hospital, Beijing, 100853, People's Republic of China
| | - Ze-Min Yang
- Pharmaceutical Department, The First Affiliated Hospital of Guangdong Pharmaceutical University, 510080, Guangzhou, People's Republic of China
| | - Xiong Li
- Pharmaceutical Department, The First Affiliated Hospital of Guangdong Pharmaceutical University, 510080, Guangzhou, People's Republic of China.
| | - Ji-Sheng Chen
- Pharmaceutical Department, The First Affiliated Hospital of Guangdong Pharmaceutical University, 510080, Guangzhou, People's Republic of China.
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Fan TF, Ye YX, Wang Q, Yang ZM, Dai BW, Zhang S, Wu HJ. [Free anterolateral thigh flap with superficial temporal vessels as recipient vessels for reconstruction of defect after maxillectomy in malignant tumor]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:369-373. [PMID: 33832196 DOI: 10.3760/cma.j.cn115330-20200918-00755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the effects of superficial temporal artery and vein as recipient vessels for the free anterolateral thigh flap on the appearance and functions after maxillectomy. Methods: Clinical data of 21 patients with malignant maxillary tumors in Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University from January 2014 to November 2019, who were treated by free anterolateral thigh flap with temporal superficial vessels as the recipient vessels were analyzed retrospectively. There were 18 males and 3 females, with the age ranging from 29 to 73 years old, including 19 cases of squamous carcinoma, 1 case of adenoid cystic carcinoma and 1 case of osteosarcoma. Of those 7 patients underwent primary surgery, 14 patients received resurgery, and 6 patients had a history of postoperative radiotherapy and chemotherapy. Among 14 patients with resurgery, 13 had recurrent ipsilateral second site tumor and 1 had recurrent tumor, and all of them received the maxillectomy and reconstructive surgery with the free anterolateral thigh flap. Patients were evaluated with water swallow test and speech intelligibility score in 1, 3 and 6 months after operation. The data were statistically analyzed with SPSS 22.0 statistical software. Water swallow test results before and after operation were compared using the Wilcoxon rank sum test. The mean speech intelligibility scores before and after operation were compared by the paired t test. Results: Patients were followed up for 10-60 months. All free flaps survived after operation. No diplopia occurred. Breathing, swallowing and speaking functions were normal. No movement disorders caused by the donor of thigh flap. Water swallow test showed no phenomenon of water flowing into the nasal cavity or oral and nasal leakage with level Ⅰ for 4 cases, level Ⅱ for 13 cases, level Ⅲ for 3 cases and level Ⅳ for 1 case. The mean speech intelligibility scores before surgery and 1, 3 and 6 months after surgery were 4.31±0.13, 1.46±0.21, 2.15±0.45 and 2.87±0.76 respectively. There was statistically significant difference in the mean speech intelligibility scores between 1 and 6 months after surgery (F=78.456, P<0.05). Conclusion: It is safe and reliable to use the superficial temporal vessels as recipient vessels for free anterolateral thigh flap in the reconstruction of defect after maxillectomy in malignant tumors, with good outcomes of functions and a satisfactory restoration of outward appearance.
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Affiliation(s)
- T F Fan
- Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University, , Changsha 410011, China
| | - Y X Ye
- Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University, , Changsha 410011, China
| | - Q Wang
- Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University, , Changsha 410011, China
| | - Z M Yang
- Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University, , Changsha 410011, China
| | - B W Dai
- Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University, , Changsha 410011, China
| | - S Zhang
- Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University, , Changsha 410011, China
| | - H J Wu
- Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University, , Changsha 410011, China
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12
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Feng L, Yang ZM, Li YC, Wang HX, Lo JHT, Zhang XT, Li G. Linc-ROR promotes mesenchymal stem cells chondrogenesis and cartilage formation via regulating SOX9 expression. Osteoarthritis Cartilage 2021; 29:568-578. [PMID: 33485931 DOI: 10.1016/j.joca.2020.12.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 12/09/2020] [Accepted: 12/28/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The present study is to characterize the role of long intergenic non-coding RNA, regulator of reprogramming (linc-ROR) in bone marrow mesenchymal stem cell (BMSCs) chondrogenesis, cartilage formation and OA development. METHODS Linc-ROR expression pattern in articular cartilage tissue sample from OA patients were studied by real-time PCR. Linc-ROR lentivirus mediated BMSCs were constructed. In vitro micromass cultured BMSCs chondrogenesis or in vivo MeHA hydrogel encapsulated BMSCs cartilage formation activity were studied. Linc-ROR associating miRNAs which repressed SOX9 expression were characterized by luciferase assay, real-time PCR and Western blot. Linc-ROR was co-transfected with miRNAs into BMSCs to study its rescue effect on SOX9 expression and chondrogenesis activity. RESULTS Linc-ROR was down-regulated in articular cartilage tissue from OA patients and was positively correlated with the expression level of SOX9 (R2 = 0.43). Linc-ROR expression was upregulated during BMSCs chondrogenesis. Linc-ROR ectopic expression significantly promoted in vitro BMSCs chondrogenesis and in vivo cartilage formation activities as revealed by safranin O, alcian blue and COL II staining. The mRNA expression level of chondrogenesis markers including COL II, SOX9 and ACAN were increased, and the hypertrophy markers MMP13 and COL X were decreased upon linc-ROR overexpression in BMSCs. Linc-ROR functioned as a miRNA sponge for miR-138 and miR-145. Both miR-138 and miR-145 suppressed BMSCs chondrogenesis activity and SOX9 expression, while co-expression of linc-ROR displayed a rescuing effect. CONCLUSIONS Taken together, linc-ROR modulated BMSCs chondrogenesis differentiation and cartilage formation by acting as a competing endogenous RNA for miR-138 and miR-145 and activating SOX9 expression. Linc-ROR could be considered as a new diagnostic and therapeutic target for OA treatment.
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Affiliation(s)
- L Feng
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
| | - Z M Yang
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
| | - Y C Li
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
| | - H X Wang
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
| | - J H T Lo
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
| | - X T Zhang
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
| | - G Li
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China; MOE Key Laboratory for Regenerative Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, SAR, PR China; Department of Orthopaedics and Traumatology, People's Hospital of Baoan District, Shenzhen, PR China.
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Yang ZM, Wang Y, Chen SY. Astragalus polysaccharide alleviates type 2 diabetic rats by reversing the glucose transporters and sweet taste receptors/GLP-1/GLP-1 receptor signaling pathways in the intestine-pancreatic axis. J Funct Foods 2021. [DOI: 10.1016/j.jff.2020.104310] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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14
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Zhang B, Yue ZY, Yang ZM, Nan P, Xu B, Dong YG, Hu YY, Li WX, Sun XH, Sun XM. [The screening value of the numerical control standardized cell block preparation technique in high-grade squamous epithelial lesions of the cervix]. Zhonghua Bing Li Xue Za Zhi 2020; 49:842-844. [PMID: 32746555 DOI: 10.3760/cma.j.cn112151-20191220-00819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- B Zhang
- Department of Pathology, the Third Affiliated Hospital of Guangdong Medical University (Longjiang Hospital, Shunde District, Foshan City), Foshan 528000, China
| | - Z Y Yue
- Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
| | - Z M Yang
- Department of Pathology, the Fourth People's Hospital, Nanhai District, Foshan City, Guangdong Province, Foshan 528200, China
| | - P Nan
- Department of Gynecology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
| | - B Xu
- Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
| | - Y G Dong
- Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
| | - Y Y Hu
- Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
| | - W X Li
- Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
| | - X H Sun
- Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
| | - X M Sun
- Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China
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15
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Chen SY, Wang Y, Zhang CL, Yang ZM. Decreased basal and stimulated salivary parameters by histopathological lesions and secretory dysfunction of parotid and submandibular glands in rats with type 2 diabetes. Exp Ther Med 2020; 19:2707-2719. [PMID: 32256753 PMCID: PMC7086285 DOI: 10.3892/etm.2020.8505] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 01/17/2020] [Indexed: 11/22/2022] Open
Abstract
Patients with type 2 diabetes mellitus (T2DM) present with dry mouth, polydipsia and taste impairment due to salivary secretion disorder. However, the underlying functional mechanism of T2DM remains unknown. The present study found that T2DM rats had significantly lower salivary flow rate and salivary alpha amylase activity, and attenuated salivary secretion responses to acid stimulation compared with control rats. Histopathological observation found that T2DM rats had inflammatory cell infiltration with increased expressions of IL-6 and TNF-α, oxidative stress, including decreased total superoxide dismutase activity and increased malondialdehyde content, and decreased expressions of β1 adrenergic receptor, cholinergic receptor, aquaporin-5 and protein kinase A in salivary glands, in particular the parotid gland. These results indicated that parotid gland impairment was more severe compared with submandibular gland impairment. Reduced salivary secretion may be associated with histopathological lesions and decreased regulation in secretory pathways in salivary glands.
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Affiliation(s)
- Si-Yu Chen
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
| | - Ying Wang
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
| | - Chun-Lei Zhang
- Department of Stomatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Ze-Min Yang
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
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Zhou M, Chen DM, Xia L, Song YY, Shi YK, Yang ZM. [Clinical research and drug review of epidermal growth factor receptor tyrosine kinase inhibitors in advanced non-small cell lung cancer]. Zhonghua Zhong Liu Za Zhi 2019; 41:949-952. [PMID: 31874554 DOI: 10.3760/cma.j.issn.0253-3766.2019.12.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Lung cancer is the most frequently diagnosed cancer and the most common cause of cancer mortality in China. Non-small cell lung cancer (NSCLC) accounts for about 85% of lung cancers. The mutation rate of epidermal growth factor receptor (EGFR) gene is relatively high, accounts for 32%~38% of all NSCLC. During the last decade, the application of EGFR specific tyrosine kinase inhibitors (TKI) significantly improved prognosis of NSCLC patients with sensitive EGFR mutations. Thus, the research and development of third generation EGFR-TKI have entered the period of rapid development. The fourth generation EGFR-TKI which targeting EGFR C797S has even begun clinical development in China. This review will discuss the clinical research and drug review of EGFR-TKI from the perspective of drug review.
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Affiliation(s)
- M Zhou
- Center for Drug Evaluation, China National Medical Products Administration, Beijing 100022, China
| | - D M Chen
- Center for Drug Evaluation, China National Medical Products Administration, Beijing 100022, China
| | - L Xia
- Center for Drug Evaluation, China National Medical Products Administration, Beijing 100022, China
| | - Y Y Song
- Center for Drug Evaluation, China National Medical Products Administration, Beijing 100022, China
| | - Y K Shi
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, Beijing 100021, China
| | - Z M Yang
- Center for Drug Evaluation, China National Medical Products Administration, Beijing 100022, China
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Zhang DY, Hu Z, Lu ST, Li SD, Yang ZM, Li PW. Preparation and characterization of catechol-functionalized chitosan thermosensitive hydrogels. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1757-899x/629/1/012038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zhou M, Chen XY, Zhang H, Xia L, Tong X, Zou LM, Hao RM, Zhao X, Shi YK, Yang ZM. [Considerations for anti-cancer drug application by single arm trials]. Zhonghua Zhong Liu Za Zhi 2018; 40:58-62. [PMID: 29365420 DOI: 10.3760/cma.j.issn.0253-3766.2018.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Single arm trial (SAT) was widely used for new drug application (NDA) of novel anti-cancer drugs in recent years. The listing time was greatly shortened by SAT while comparing with randomized controlled trials (RCT). Thus, the companies intended to get NDA through SAT. To encourage innovation and accelerate the developments of anti-cancer agents, we summarize the background and key issues of SAT, discuss the conditions of accepting SAT for NDA, and systematically elaborate the design and principles of SAT in this review.
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Affiliation(s)
- M Zhou
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - X Y Chen
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - H Zhang
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - L Xia
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - X Tong
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - L M Zou
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - R M Hao
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - X Zhao
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
| | - Y K Shi
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Z M Yang
- China Food and Drug Administration Center for Drug Evaluation, Beijing 100038, China
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Liu JW, Lu X, Yang ZM, Deng LJ, Yang L. [Immune effects of specific CTLs response induced by dendritic cells pulsed with NY-ESO-1 peptide]. Beijing Da Xue Xue Bao Yi Xue Ban 2017; 49:840-846. [PMID: 29045966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To explore the potential of autologous dendritic cells (DCs) pulsed with caner/testis antigen NY-ESO-1 peptides in inducing specific cytotoxic T lymphocyte (CTLs) response and antineoplastic immune function of specific CTLs. METHODS Fifteen patients with II to III stage positive HLA -A0201+ and NY-ESO-1+ were enrolled in the Cancer Hospital Chinese Academy of Medical Sciences on the basis of preclinical experiments from November 2014 to October 2015, and their peripheral blood mononuclear cells (PBMCs) and peripheral blood lymphocytes (PBLs) were isolated. The PBMCs were induced into DCs and pulsed with NY-ESO-1 peptide. The phenotypes of DCs were stained with antibodies against HLA-DR+CD11c+,CD80+,CD83+ and CD86+, and subsequently analyzed by multichannel flow cytometry (FCM). The killing effects of CTLs pulsed with HLA-A0201-binding peptide NY-ESO-1 and the potential of autologous DCs pulsed with NY-ESO-1 peptides in inducing specific cytotoxic T lymphocytes (CTLs) responses were determined. The patients were administered two infusions of auto-logous CTLs for 1 time every two weeks. The total infusion was with 2 times. The immunological responses and clinical responses were examined in 1 week after the final administration. RESULTS The immunophenotype of DCs pulsed with NY-ESO-1 peptide was analyzed, HLA-DR+CD11c+ cells (93.6%±1.2%), CD80+ cells (87.3%±3.6%), CD83+ cells (82.8%±2.5%) and CD86+ cells (93.4%±6.4%). PBLs isolated from patients primed by DCs pulsed with NY-ESO-1 peptide proliferated continuously and the proliferation index (PI) of the PBLs were analyzed. There was significant difference between the DCs loaded with polypeptides and those unloaded, though it could promote the proliferation of PBLs, but the PI was significantly lower than that of the DCs loaded with NY-ESO-1 peptide (P<0.05). The average percentage of special CTLs primed by DCs pulsed with NY-ESO-1 peptides was significantly higher than that in the control group (5.2%±1.2% vs. 0.4%±0.1%). CTLs induced by NY-ESO-1 pulsed DCs exerted a stronger killing effect on T2 cell line pulsed with NY-ESO-1 peptide than that in the control group at the ratio of E (effect) to T (target) as 30:1, P<0.05. The cytokine levels in the patients'sera such as IFN-γ, IL-2 and IL-12 were increased after treatments [(132.9±10.2) μg/L vs. (46.4±3.1) μg/L; (101.3±6.4) μg/L vs. (26.7±1.2) μg/L; (51.3±2.6) μg/L vs. (26.4±1.1) μg/L; all P<0.05], and the percentages of antigen-specific CD8+IFN-γ+ increased in these patients (P<0.01). CONCLUSION Auto-DCs pulsed with NY-ESO-1 peptides can induce the proliferation of allogenic CTLs, which elicit specific immune responses ex vivo or in vivo, and boost anticancer immunity markedly.
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Affiliation(s)
- J W Liu
- Beijing Biohealthcare Biotechnology Co. Ltd, Beijing 101318, China
| | - X Lu
- Beijing Biohealthcare Biotechnology Co. Ltd, Beijing 101318, China
| | - Z M Yang
- Beijing Biohealthcare Biotechnology Co. Ltd, Beijing 101318, China
| | - L J Deng
- Beijing Biohealthcare Biotechnology Co. Ltd, Beijing 101318, China
| | - L Yang
- National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Niu L, Liu HL, Yang ZM. [Research update on the regulation of monocyte/macrophages by Krüppel-like factors in atherosclerosis]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:451-453. [PMID: 28511337 DOI: 10.3760/cma.j.issn.0253-3758.2017.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Yang ZM, Chen LH, Hong M, Chen YY, Yang XR, Tang SM, Yuan QF, Chen WW. Serum microRNA profiling and bioinformatics analysis of patients with type 2 diabetes mellitus in a Chinese population. Mol Med Rep 2017; 15:2143-2153. [PMID: 28260062 PMCID: PMC5364922 DOI: 10.3892/mmr.2017.6239] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 12/19/2016] [Indexed: 12/19/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is characterized by islet β-cell dysfunction and insulin resistance, which leads to an inability to maintain blood glucose homeostasis. Circulating microRNAs (miRNAs) have been suggested as novel biomarkers for T2DM prediction or disease progression. However, miRNAs and their roles in the pathogenesis of T2DM remain to be fully elucidated. In the present study, the serum miRNA expression profiles of T2DM patients in Chinese cohorts were examined. Total RNA was extracted from serum samples of 10 patients with T2DM and five healthy controls, and these was used in reverse-transcription‑quantitative polymerase chain reaction analysis with the Exiqon PCR system of 384 serum/plasma miRNAs. A total of seven miRNAs were differentially expressed between the two groups (fold change >3 or <0.33; P<0.05). The serum expression levels of miR‑455‑5p, miR‑454‑3p, miR‑144‑3p and miR‑96‑5p were higher in patients with T2DM, compared with those of healthy subjects, however, the levels of miR‑409‑3p, miR‑665 and miR‑766‑3p were lower. Hierarchical cluster analysis indicated that it was possible to separate patients with T2DM and control individuals into their own similar categories by these differential miRNAs. Target prediction showed that 97 T2DM candidate genes were potentially modulated by these seven miRNAs. Kyoto Encyclopedia of Genes and Genomes pathway analysis revealed that 24 pathways were enriched for these genes, and the majority of these pathways were enriched for the targets of induced and repressed miRNAs, among which insulin, adipocytokine and T2DM pathways, and several cancer‑associated pathways have been previously associated with T2DM. In conclusion, the present study demonstrated that serum miRNAs may be novel biomarkers for T2DM and provided novel insights into the pathogenesis of T2DM.
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Affiliation(s)
- Ze-Min Yang
- Department of Biochemistry and Molecular Biology, School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
- Correspondence to: Professor Ze-Min Yang, Department of Biochemistry and Molecular Biology, School of Basic Courses, Guangdong Pharmaceutical University, 280 Waihuan Road East, Guangzhou, Guangdong 510006, P.R. China, E-mail:
| | - Long-Hui Chen
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China
| | - Min Hong
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, Guangdong 510080, P.R. China
| | - Ying-Yu Chen
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, Guangdong 510080, P.R. China
| | - Xiao-Rong Yang
- Clinical Laboratory, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, Guangdong 510080, P.R. China
| | - Si-Meng Tang
- Department of Biochemistry and Molecular Biology, School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
| | - Qian-Fa Yuan
- Department of Biochemistry and Molecular Biology, School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
| | - Wei-Wen Chen
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China
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Yan WF, Xue JJ, Yang HY, Liang B, Yang ZM. [Effects and related mechanism of angiotensin-(1-7) on Toll-like receptor 4-mediated oxidative stress in human umbilical vein endothelial cells]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:223-229. [PMID: 28316179 DOI: 10.3760/cma.j.issn.0253-3758.2017.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the role and related mechanisms of angiotensin-(1-7)(Ang-(1-7)) on Toll-like receptor 4 (TLR4) mediated oxidized low-density lipoprotein(ox-LDL)-induced oxidative stress in human umbilical vein endothelial cells (HUVECs). Methods: HUVECs were cultured in vitro and divided into six groups: the control group (normal medium), the ox-LDL group(treated with 75 mg/L ox-LDL), the ox-LDL+ Ang-(1-7) group (1 μmol/L Ang-(1-7) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ Ang-(1-7)+ A-779 group(1 μmol/L A-779 (Mas receptor) pretreated for 30 minutes, 1 μmol/L Ang-(1-7) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ A-779 group (1 μmol/L A-779 pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ HTA125 group (10 μg/L HTA125 (TLR4-blocking antibody) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL ). The corresponding index was detected after 24 hours after intervention. Apoptosis of cells were detected by Annexin V-FITC/PI double staining flow cytometry and transferase-mediated deoxyuridine triphosphate-biotin nick end labeling (TUNEL). The generation of reactive oxygen species (ROS), products in oxidative stress, were detected by DCFH-DA staining. The mRNA and protein expression levels of NADPH oxidase 4(NOX4) and TLR4 were detected by real-time reverse transcription-polymerase chain reaction (RT-PCR) and Western blotting analysis respectively. Results: (1) The results of Annexin V-FITC/PI double staining flow cytometry showed that the proportion of apoptotic cells was higher in ox-LDL group than in control group ((21.18±1.40)% vs. (1.59±0.26)%, P<0.01), lower in ox-LDL+ Ang-(1-7) group((7.42±1.07)%) and ox-LDL+ HTA125 group((9.19±1.01)%) than in ox-LDL group (both P<0.01), higher in ox-LDL+ Ang-(1-7)+ A-779 group ((19.91±1.30)%) and ox-LDL+ A-779 group((20.47±0.95)%) than in ox-LDL+ Ang-(1-7) group (both P<0.01). (2) The TUNEL results showed that the proportion of apoptotic cells was higher in ox-LDL group than in control group((10.83±0.77)% vs. (2.83±0.82)%, P<0.01), lower in ox-LDL+ Ang-(1-7) group ((3.66±0.54)%)and ox-LDL+ HTA125 group((4.97±0.60)%) than in ox-LDL group(both P<0.01), higher in ox-LDL+ Ang-(1-7)+ A-779 group((10.69±0.62)%) and ox-LDL+ A-779 group((11.43±0.42)%) than in ox-LDL+ Ang-(1-7) group (both P<0.01). (3) ROS level was higher in ox-LDL group than in control group(0.093±0.014 vs. 0.053±0.011, P<0.01), lower in ox-LDL+ Ang-(1-7) group (0.063±0.011, P<0.01)and ox-LDL+ HTA125 group(0.070±0.010, P<0.05)than in ox-LDL group, higher in ox-LDL+ Ang-(1-7)+ A-779 group(0.088±0.003) and ox-LDL+ A-779 group(0.095±0.005) than in ox-LDL+ Ang-(1-7) group (both P<0.01). (4) The mRNA expression level of NOX4 was higher in ox-LDL group than in control group(11.74±0.65 vs. 1.00±0.00, P<0.01), lower in ox-LDL+ Ang-(1-7) group (2.85±0.75)and ox-LDL+ HTA125 group(5.57±0.52) than in ox-LDL group(both P<0.01), higher in ox-LDL+ Ang-(1-7)+ A-779 group(10.51±0.54) and ox-LDL+ A-779 group (11.04±1.01) than in ox-LDL+ Ang-(1-7) group (both P<0.01), higher in ox-LDL group than in control group(27.60±1.86 vs. 1.00±0.00, P<0.01), lower in ox-LDL+ Ang-(1-7) group (8.00±1.03)and ox-LDL+ HTA125 group(14.83±0.97)than in ox-LDL group(both P<0.01), higher in ox-LDL+ Ang-(1-7)+ A-779 group(24.81±2.19) and ox-LDL+ A-779 group (26.64±0.65)than in ox-LDL+ Ang-(1-7) group (both P<0.01). (5)The protein expression level of NOX4 was higher in ox-LDL group than in control group (0.61±0.09 vs. 0.23±0.02, P<0.01), lower in ox-LDL+ Ang-(1-7) group(0.27±0.03) and ox-LDL+ HTA125 group(0.22±0.02) than in ox-LDL group(both P<0.01), higher in ox-LDL+ Ang-(1-7)+ A-779 group (0.58±0.06)and ox-LDL+ A-779 group(0.61±0.03) than in ox-LDL+ Ang-(1-7) group (both P<0.01). The protein expression level of TLR4 was higher in ox-LDL group than in control group(0.18±0.02 vs. 0.08±0.01, P<0.01), lower in ox-LDL+ Ang-(1-7) group(0.07±0.01) and ox-LDL+ HTA125 group(0.09±0.01) than in ox-LDL group(both P<0.01), higher in ox-LDL+ Ang-(1-7)+ A-779 group(0.18±0.02) and ox-LDL+ A-779 group(0.20±0.02) than in ox-LDL+ Ang-(1-7) group (both P<0.01). Conclusion: TLR4 mediated the ox-LDL induced injury in HUVECs, and Ang-(1-7) could attenuate ox-LDL induced injury in HUVECs by modulating the specific Mas receptors.
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Affiliation(s)
- W F Yan
- Department of Cardiology, Second Hospitol of Shanxi Medical University, Taiyuan 030001, China
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Yang ZM, Chen LH, Hong M, Chen YY, Yang XR, Tang SM, Yuan QF, He ZY, Chen WW. Serum MicroRNA Profiling and Bioinformatics of Patients with Spleen-Deficiency Syndrome. Evid Based Complement Alternat Med 2016; 2016:8726720. [PMID: 27994634 PMCID: PMC5141567 DOI: 10.1155/2016/8726720] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 09/08/2016] [Accepted: 10/05/2016] [Indexed: 01/22/2023]
Abstract
To investigate serum microRNA (miRNA) profile and bioinformatics of patients with spleen-deficiency syndrome (SDS) and explore pathogenesis of SDS patients from miRNA levels, 10 patients with type 2 diabetes mellitus (T2DM), within which 5 patients were with SDS and the remaining were with blood stasis syndrome (BSS), and 5 healthy volunteers were recruited. Serum miRNA profiles of SDS patients were identified by quantitative PCR array. Target prediction and functional annotation for miRNAs were performed by miRSystem database. The present study identified 11 candidate serum miRNAs for SDS patients, and their targets were significantly enriched in 18 KEGG pathways and 7 GO molecular functions. Those enriched KEGG pathways included (1) metabolisms of carbohydrate, protein, amino acid, and fatty acid, (2) signaling pathways of insulin, ErbB, chemokine, calcium, and type II diabetes mellitus, (3) invasions of bacterium, Escherichia coli, and Shigella (Shigellosis), and (4) endocytosis and phagocytosis. Those enriched GO molecular functions were mainly involved in transcription regulation and regulation of metabolism. Our findings might elucidate the pathogenesis of SDS patients with disorders of substance metabolism and hypoimmunity from miRNA levels, as well as providing some miRNA biomarkers for clinical syndrome differentiation of SDS.
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Affiliation(s)
- Ze-Min Yang
- School of Basic Courses, Guangdong Pharmaceutical University, No. 280 Waihuan Road East, Higher Education Mega Center, Panyu District, Guangzhou 510006, China
- *Ze-Min Yang:
| | - Long-Hui Chen
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, No. 12 Jichang Road, Baiyun District, Guangzhou 510405, China
| | - Min Hong
- Department of Traditional Chinese Medicine, First Affiliated Hospital of Guangdong Pharmaceutical University, No. 19 Nonglinxia Road, Guangzhou 510080, China
| | - Ying-Yu Chen
- Department of Traditional Chinese Medicine, First Affiliated Hospital of Guangdong Pharmaceutical University, No. 19 Nonglinxia Road, Guangzhou 510080, China
| | - Xiao-Rong Yang
- Clinical Laboratory, First Affiliated Hospital of Guangdong Pharmaceutical University, No. 19 Nonglinxia Road, Guangzhou 510080, China
| | - Si-Meng Tang
- School of Basic Courses, Guangdong Pharmaceutical University, No. 280 Waihuan Road East, Higher Education Mega Center, Panyu District, Guangzhou 510006, China
| | - Qian-Fa Yuan
- School of Basic Courses, Guangdong Pharmaceutical University, No. 280 Waihuan Road East, Higher Education Mega Center, Panyu District, Guangzhou 510006, China
| | - Zhen-Yu He
- School of Basic Courses, Guangdong Pharmaceutical University, No. 280 Waihuan Road East, Higher Education Mega Center, Panyu District, Guangzhou 510006, China
| | - Wei-Wen Chen
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, No. 12 Jichang Road, Baiyun District, Guangzhou 510405, China
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Yang ZM, Chen LH, Zhang M, Lin J, Zhang J, Chen WW, Yang XR. Age Differences of Salivary Alpha-Amylase Levels of Basal and Acute Responses to Citric Acid Stimulation Between Chinese Children and Adults. Front Physiol 2015; 6:340. [PMID: 26635626 PMCID: PMC4649062 DOI: 10.3389/fphys.2015.00340] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 11/02/2015] [Indexed: 11/13/2022] Open
Abstract
It remains unclear how salivary alpha-amylase (sAA) levels respond to mechanical stimuli in different age groups. In addition, the role played by the sAA gene (AMY1) copy number and protein expression (glycosylated and non-glycosylated) in sAA activity has also been rarely reported. In this study, we analyzed saliva samples collected before and after citric acid stimulation from 47 child and 47 adult Chinese subjects. We observed that adults had higher sAA activity and sAA glycosylated levels (glycosylated sAA amount/total sAA amount) in basal and stimulated saliva when compared with children, while no differences were found in total or glycosylated sAA amount between them. Interestingly, adults showed attenuated sAA activity levels increase over those of children after stimulation. Correlation analysis showed that total sAA amount, glycosylated sAA amount, and AMY1 copy number × total sAA amount were all positively correlated with sAA activity before and after stimulation in both groups. Interestingly, correlation r between sAA levels (glycosylated sAA amount and total sAA amount) and sAA activity decreased after stimulation in children, while adults showed an increase in correlation r. In addition, the correlation r between AMY1 copy number × total sAA amount and sAA activity was higher than that between AMY1 copy number, total sAA amount, and sAA activity, respectively. Taken together, our results suggest that total sAA amount, glycosylated sAA amount, and the positive interaction between AMY1 copy number and total sAA amount are crucial in influencing sAA activity before and after stimulation in children and adults.
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Affiliation(s)
- Ze-Min Yang
- Department of Biochemistry and Molecular Biology, School of Basic Courses, Guangdong Pharmaceutical UniversityGuangzhou, China
- *Correspondence: Ze-Min Yang
| | - Long-Hui Chen
- Pi-Wei Institute, Guangzhou University of Chinese MedicineGuangzhou, China
| | - Min Zhang
- Pediatrics of Traditional Chinese Medicine, Haizhu Maternal and Child Health HospitalGuangzhou, China
| | - Jing Lin
- Department of Biochemistry and Molecular Biology, School of Basic Courses, Guangdong Pharmaceutical UniversityGuangzhou, China
| | - Jie Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Courses, Guangdong Pharmaceutical UniversityGuangzhou, China
| | - Wei-Wen Chen
- Pi-Wei Institute, Guangzhou University of Chinese MedicineGuangzhou, China
| | - Xiao-Rong Yang
- Clinical Laboratory, The First Affiliated Hospital of Guangdong Pharmaceutical UniversityGuangzhou, China
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Yang ZM, Lin J, Chen LH, Zhang M, Chen WW, Yang XR. The roles of AMY1 copies and protein expression in human salivary α-amylase activity. Physiol Behav 2015; 138:173-8. [PMID: 25446200 DOI: 10.1016/j.physbeh.2014.10.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 10/21/2014] [Accepted: 10/27/2014] [Indexed: 11/11/2022]
Abstract
Salivary α-amylase (sAA) activity has been extensively investigated in nutrition and psychology. But few studies were performed to assess the role played by sAA gene (AMY1) copies and protein expression in basal and stimulus-induced sAA activity. The sAA activity, amount and AMY1 copy number were determined from 184 saliva samples pre- and post-citric acid stimulation. Our findings showed that citric acid could induce significant increase in sAA activity, total sAA amount, and glycosylated sAA amount, among which the glycosylated sAA amount had the largest response. The correlation analysis showed that AMY1 copy number, total sAA amount and AMY1 copy number×total sAA amount had significantly positive and successively increasing correlations with sAA activity in unstimulated and stimulated saliva, respectively, and furthermore, we observed higher correlations in unstimulated saliva when compared with the corresponding correlations in stimulated saliva. We also observed significant correlations between glycosylated sAA amount and sAA activity in unstimulated and stimulated saliva, respectively. Interestingly, the correlations were higher in stimulated saliva than in unstimulated saliva, and the correlations between glycosylated sAA amount and sAA activity were higher than that of between total sAA amount and sAA activity in stimulated saliva. Moreover, total sAA amount ratio and glycosylated sAA amount ratio showed significantly positive correlation with sAA activity ratio. AMY1 copy number had no correlation with sAA activity ratio. These findings suggested that AMY1 copy number and sAA amount played crucial roles in sAA activity; however, the roles were attenuated after stimulation due to fortified release of glycosylated sAA.
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Affiliation(s)
- Ze-Min Yang
- School of Basic Courses, Guangdong Pharmaceutical University, China.
| | - Jing Lin
- School of Basic Courses, Guangdong Pharmaceutical University, China
| | - Long-Hui Chen
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, China
| | - Min Zhang
- Pediatrics of Traditional Chinese Medicine, Haizhu Maternal and Child Health Hospital, China
| | - Wei-Wen Chen
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, China
| | - Xiao-Rong Yang
- Clinical Laboratory, The First Affiliated Hospital of Guangdong Pharmaceutical University, China
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Zhou ZH, He SL, Huang TL, Liu LH, Liu QQ, Zhao YM, Ou BL, Zeng WN, Yang ZM, Cao DF. Degradation behaviour and biological properties of gelatin/hyaluronic acid composite scaffolds. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/1433075x13y.0000000084] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Z H Zhou
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan University of Science and Technology, Xiangtan, China
| | - S L He
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
| | - T L Huang
- Department of OrthopedicsThe Second Xiangya Hospital, Central South University, Changsha, China
| | - L H Liu
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
| | - Q Q Liu
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
| | - Y M Zhao
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
| | - B L Ou
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
| | - W N Zeng
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
| | - Z M Yang
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
| | - D F Cao
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
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Abstract
Sacral giant cell tumour of bone has an insidious onset and slow growth rate, making early diagnosis difficult. The tumour has a high recurrence rate and is often fatal. Magnetic resonance imaging and computed tomography (CT), including CT-guided fine-needle biopsy, are useful for early diagnosis. Although therapy for sacral giant cell tumour often involves surgical resection and reconstruction challenges, improvements in various treatment modalities, including arterial embolization and radiotherapy, have widened the effective treatment options. The current surgical and adjuvant treatment modalities available for the management of sacral giant cell tumour are systematically reviewed and a suggested treatment algorithm is provided. En bloc excision remains the surgical procedure of choice, with functional reconstruction important in cases where the lesion is high in the sacrum. The use of adjuvant radiotherapy and chemotherapy remains controversial and should be studied further. Determination of the optimum treatment for sacral giant cell tumour will require randomized controlled trials. Early diagnosis, complete surgical resection with tumour-free margins and comprehensive treatment are important for local tumour control and improved outcome.
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Affiliation(s)
- C C Shen
- Department of Orthopaedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Yang ZM, Chen WW. [Molecular phylogeny analysis of full-length vacA and cagA genes from Helicobacter pylori]. Yi Chuan 2012; 34:863-871. [PMID: 22805212 DOI: 10.3724/sp.j.1005.2012.00863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
All amino acid full-length sequences of VacA and CagA proteins from Helicobacter pylori strains including vacA and cagA genes were downloaded from GenBank. Molecular phylogenic trees of VacA and CagA were constructed by ClastalX 2.0 and MEGA 5.05 software to understand phylogenetic relationships of vacA and cagA genes, clinical infection effects, and genotype characteristics of different clustering groups. The results showed that the phylogenetic trees of VacA and CagA recapitulated the same three-clustering groups, i.e., East Asia group 1 and 2 and Western group, and all H. pylori strains had similar distribution. The strains of East Asia group 1 were significantly higher in patients with atrophic gastritis. Genotype vacA contained mainly s1c/m1b and s1a/m1b, while genotype cagA was mostly EPIYA-ABD. The strains of East Asia group 2 were higher in patients with duodenal ulcer. Genotype vacA was mainly s1c/m2 and s1a/m2, while genotype cagA was mostly EPIYA-AB'C. The strains of Western group were higher in patients with duodenal ulcer and chronic gastritis than with atrophic gastritis. Genotype vacA was mainly s1a/m1a and s1b/m1a, while genotype cagA was mostly EPIYA-AB/B'CC. All of these results illustrated that there might be inheritant relationship of coevolution between vacA and cagA genes; East Asia group 1 and 2 and Western group had different vacA and cagA sub-genotypes, which had close rela-tionship to its clinical infection effects. It might be necessary to deeply analyze vacA and cagA sub-genotypes in the re-search of H. pylori-related diseases.
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Affiliation(s)
- Ze-Min Yang
- School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou 510006, China.
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Yang ZM, Chen WW, Wang YF. Gene expression profiling in gastric mucosa from Helicobacter pylori-infected and uninfected patients undergoing chronic superficial gastritis. PLoS One 2012; 7:e33030. [PMID: 22438889 PMCID: PMC3306372 DOI: 10.1371/journal.pone.0033030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 02/09/2012] [Indexed: 12/13/2022] Open
Abstract
Helicobacter pylori infection reprograms host gene expression and influences various cellular processes, which have been investigated by cDNA microarray using in vitro culture cells and in vivo gastric biopsies from patients of the Chronic Abdominal Complaint. To further explore the effects of H. pylori infection on host gene expression, we have collected the gastric antral mucosa samples from 6 untreated patients with gastroscopic and pathologic confirmation of chronic superficial gastritis. Among them three patients were infected by H. pylori and the other three patients were not. These samples were analyzed by a microarray chip which contains 14,112 cloned cDNAs, and microarray data were analyzed via BRB ArrayTools software and Ingenuity Pathways Analysis (IPA) website. The results showed 34 genes of 38 differentially expressed genes regulated by H. pylori infection had been annotated. The annotated genes were involved in protein metabolism, inflammatory and immunological reaction, signal transduction, gene transcription, trace element metabolism, and so on. The 82% of these genes (28/34) were categorized in three molecular interaction networks involved in gene expression, cancer progress, antigen presentation and inflammatory response. The expression data of the array hybridization was confirmed by quantitative real-time PCR assays. Taken together, these data indicated that H. pylori infection could alter cellular gene expression processes, escape host defense mechanism, increase inflammatory and immune responses, activate NF-κB and Wnt/β-catenin signaling pathway, disturb metal ion homeostasis, and induce carcinogenesis. All of these might help to explain H. pylori pathogenic mechanism and the gastroduodenal pathogenesis induced by H. pylori infection.
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Affiliation(s)
- Ze-Min Yang
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
- School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou, Guangdong, China
| | - Wei-Wen Chen
- Pi-Wei Institute, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
- E-Institute of Traditional Chinese Medicine Internal Medicine, Shanghai Municipal Education Committee, Shanghai, China
- * E-mail:
| | - Ying-Fang Wang
- School of Chinese Materia Medica, Guangdong Pharmaceutical University, Guangzhou, Guangdong, China
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Yang ZM. Relationship between full-length sequence characteristics of the vacA gene from high-cytotoxic and low-cytotoxic Helicobacter pylori in China and VacA activities. Shijie Huaren Xiaohua Zazhi 2011; 19:3446-3451. [DOI: 10.11569/wcjd.v19.i33.3446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the effect of vacA gene sequence variation on VacA activity by analyzing the full-length sequence of the vacA gene of high- and low-cytotoxic Helicobacter pylori (H. pylori) strains isolated from China.
METHODS: The full-length sequences of the vacA gene of four high- and four low-cytotoxic H. pylori strains were retrieved from GenBank database and analyzed using three bioinformatic programs (DNAMAN, Lasergene 7.0 and MEGA 5.0).
RESULTS: There existed significant sequence variations in the vacA gene among high- and low-cytotoxic H. pylori strains isolated from China and a high-cytotoxic H. pylori 60190 strain isolated from west country. These variations were mainly concentrated on the p55 domain of the vacA gene, resulting in transitions between hydrophobic and polar amino acids. Several insertion variations were detected in low-cytotoxic H. pylori strains compared to the H. pylori 60190 strain. High- and low-cytotoxic strains as well as strains isolated from China and west countrywere clustered as different H. pylori lineages.
CONCLUSION: Sequence and insert variation in the vacA gene might be an important reason resulting in VacA activity difference among H. pylori strains.
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Ding YH, Zhang P, Zhuo Q, Ren HM, Yang ZM, Jiang Y. A green approach to the synthesis of reduced graphene oxide nanosheets under UV irradiation. Nanotechnology 2011; 22:215601. [PMID: 21451219 DOI: 10.1088/0957-4484/22/21/215601] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We present a totally green approach towards the synthesis and stabilization of aqueous graphene dispersions through UV-irradiated reduction of exfoliated graphene oxide (GO). Polyvinyl pyrrolidone (PVP) is used to enhance the dispersibility of reduced graphene oxide (RGO) by one-step functionalization. The proposed method is low cost and easy without using any photocatalysts or reducing agents, which can open up a new possibility for green preparation of stable RGO dispersions in large-scale production.
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Affiliation(s)
- Y H Ding
- Institute of Rheology Mechanics, Xiangtan University, Hunan 411105, People's Republic of China.
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Xu SH, Yang ZM, Liu T, Zhang WN, Feng ZM, Zhang QY, Jiang ZH. An efficient compact 300 mW narrow-linewidth single frequency fiber laser at 1.5 microm. Opt Express 2010; 18:1249-1254. [PMID: 20173948 DOI: 10.1364/oe.18.001249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An efficient single frequency fiber laser by using a newly-developed Er(3+)/Yb(3+) co-doped single mode phosphate glass fiber with the net gain coefficient of 5.2 dB/cm and propagation loss coefficient of 0.04 dB/cm has been demonstrated. Over 300 mW stable continuous -wave single transverse and longitudinal mode seed lasering at 1.5 microm has been achieved from a 2.0 cm-long active fiber. The measured slope efficiency and the calculated quantum efficiency of laser emission are found to be 30.9% and 0.938 +/- 0.081, respectively. It is found that the linewidth of the fiber laser is less than 2 kHz, and the measured relative intensity noise (RIN) is around -120 dB/Hz in the frequency range of 50 to 500 kHz.
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Affiliation(s)
- S H Xu
- Institute of Optical Communication Materials, South China University of Technology, GuangZhou, P. R. China
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Zhang WJ, Zhang QY, Chen QJ, Qian Q, Yang ZM, Qiu JR, Huang P, Wang YS. Enhanced 2.0 microm emission and gain coefficient of transparent glass ceramic containing BaF2: Ho3+,Tm3+ nanocrystals. Opt Express 2009; 17:20952-20958. [PMID: 19997333 DOI: 10.1364/oe.17.020952] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Transparent glass ceramic containing BaF(2):Ho(3+),Tm(3+) nanocrystals has been prepared by melt quenching and subsequent thermal treatment. The precipitation of BaF(2) nanocrystals was confirmed by X-ray diffraction and high-resolution transmission electron microscopy. Intense 2.0 microm fluorescence originating from Ho(3+): (5)I(7) --> (5)I(8) transition was achieved upon excitation with 808 nm laser diode. A large ratio of forward Tm(3+) --> Ho(3+) energy transfer constant to that of backward process indicated high efficient energy transfer from Tm(3+)((3)F(4)) to Ho(3+)((5)I(7)), benefited from the reduced ionic distances of Tm(3+)-Tm(3+) and Tm(3+)-Ho(3+) pairs and low phonon energy environment with the incorporation of rare-earth ions into the precipitated BaF(2) nanocrystals. The results indicate that glass ceramic is a promising candidate material for 2.0 microm laser.
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Affiliation(s)
- W J Zhang
- Key Lab of Specially Functional Materials of Ministry of Education, Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, P. R. China
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Liu T, Yang ZM, Xu SH. Analytical investigation on transient thermal effects in pulse end-pumped short-length fiber laser. Opt Express 2009; 17:12875-12890. [PMID: 19654693 DOI: 10.1364/oe.17.012875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The transient heat conduction and thermal effects in pulse end-pumped fiber laser are modeled and analytically solved. For the arbitrary temporal shape of pump pulse, a three-dimensional (3D) temperature expression is derived via an integral transform method, and the thermal stress field is deduced through solving the Navier displacement equations. The results show that pulse shape has an important influence on the peak thermal stress and transient phase shift induced by heating of the fiber. Reasonable design for pulse duration and period can reduce thermal effects and optimize the performance of high-power fiber laser.
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Affiliation(s)
- T Liu
- Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, China
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Abstract
AIM To understand the role of fengycins in regulating the fumonisin B1 (FB1)production of Fusarium verticillioides. METHODS AND RESULTS The mass ratio of FB1 to mycelia was determined in order to identify the effect of fengycins on FB1 production. It was shown that the amount of FB1 produced by unit mass mycelia decreased to 28% of the control. Results from mycelia resuspension with fengycins also demonstrated that fengycins had a potent impact on FB1 production. Gene expression patterns using quantitative reverse-transcription PCR (RT-PCR) revealed that the transcriptional levels of both FUM1 and FUM8 (coding enzymes for the generation of FB1) were down-regulated with fengycin treatment. CONCLUSIONS Fengycins could down-regulate the transcription of some key genes involved in the production of FB1, and impair FB1 synthesis by F. verticillioides. SIGNIFICANCE AND IMPACT OF THE STUDY These results further improved our understanding of fengycins as the potential candidates to control FB1 contamination in crops and food.
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Affiliation(s)
- L B Hu
- School of Food, Henan Institute of Science and Technology, Xinxiang, China
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36
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Abstract
A 3-dimenstional (3D) heat flow model of laser diode (LD) pumped short-length Er(3+)/Yb(3+) heavily co-doped phosphate fiber laser that includes the energy-transfer upconversion (ETU) effects has been developed. The fully 3D analytical solution with the consideration of longitudinal heat flow has been given to describe the temperature distribution in phosphate fiber. The calculated results show that both ETU processes and longitudinal heat conduction have a great influence on the fiber laser performance. Finally, we have validated the analytical expression by measuring the temperature distribution of an end-pumped short-length Er(3+)/Yb(3+) co-doped fiber laser, which was placed into the copper tube.
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Affiliation(s)
- T Liu
- Institute of Optical Communication Materials, South China University of Technology, GuangZhou, China
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37
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Qian Q, Zhao C, Yang GF, Yang ZM, Zhang QY, Jiang ZH. Thermal stability and spectroscopic properties of Er3+-doped antimony-borosilicate glasses. Spectrochim Acta A Mol Biomol Spectrosc 2008; 71:280-285. [PMID: 18255334 DOI: 10.1016/j.saa.2007.12.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2007] [Revised: 12/11/2007] [Accepted: 12/14/2007] [Indexed: 05/25/2023]
Abstract
This paper reports on the optical spectroscopic properties and thermal stability of Er3+-doped antimony-borosilicate glasses for developing 1.5 microm optical amplifiers. Upon excitation at 980 nm laser diode, an intense 1.5 microm infrared fluorescence has been observed with the maximum full width at half maximum (FWHM) of 90 nm for Er3+-doped antimony-borosilicate glasses. The emission cross-section and the lifetime of the 4I13/2 level of Er3+ ions are 6.3 x 10(-21) cm2 and 0.30 ms, respectively. It is noted that the product of the emission cross-section and FWHM of the glass studied is as great as 567 x 10(-21) cm2 nm, which is comparable or higher than that of bismuthate and tellurite glasses.
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Affiliation(s)
- Q Qian
- Key Laboratory of Specially Functional Materials of Ministry of Education, South China University of Technology, 381# Wushan Road, Guangzhou 510641, PR China
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38
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Huang ZP, Yu H, Yang ZM, Shen WX, Wang J, Shen QX. Uterine expression of implantation serine proteinase 2 during the implantation period and in vivo inhibitory effect of its antibody on embryo implantation in mice. Reprod Fertil Dev 2007; 16:379-84. [PMID: 15304212 DOI: 10.10371/rd03102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2003] [Accepted: 01/07/2004] [Indexed: 11/20/2022] Open
Abstract
The aim of the present study was to examine the uterine expression pattern of implantation serine proteinase 2 (ISP2) protein during early pregnancy in mice and the effects of anti-ISP2 antibody on embryo implantation. Expression of ISP2 protein was found to be specifically up-regulated in mouse uterine endometrial glands following the initiation of embryo implantation. Similarly, ISP2 protein expression was observed during pseudopregnancy, indicating that its expression is not embryo dependent. In other experiments, rabbit anti-ISP2 IgG was infused into the mouse uterine lumen on Day 3 or 4 of pregnancy to examine its effects on embryo implantation, whereas vehicle (saline) or unspecific rabbit IgG served as controls. The mean number of implanted embryos from anti-ISP2-IgG-treated mice was significantly lower than that from control mice. These results suggest that ISP2 may play an important role during embryo implantation.
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Affiliation(s)
- Z P Huang
- State Family Planning Commission Key Laboratory of Contraceptive Drugs and Devices, Shanghai Institute of Planned Parenthood Research, Shanghai, China
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39
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Luk JM, Lee NPY, Shum CK, Lam BY, Siu AFM, Che CM, Tam PC, Cheung ANY, Yang ZM, Lin YN, Matzuk MM, Lee KF, Yeung WSB. Acrosome-specific gene AEP1: identification, characterization and roles in spermatogenesis. J Cell Physiol 2007; 209:755-66. [PMID: 16924657 DOI: 10.1002/jcp.20746] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Spermatogenesis is a tightly regulated process leading to the development of spermatozoa. To elucidate the molecular spermatogenic mechanisms, we identified an acrosome-specific gene AEP1 in spermatids, which is located in rat chromosome 17p14 with a transcript size of 3,091 bp encoding a signal peptide, zinc finger-like motif, coiled-coil region, several predicted glycosylation and phosphorylation sites. Northern blot and RT-PCR analyses revealed the restricted expression of AEP1 to the testis only. In postnatal rat testes, AEP1 mRNA became detectable from postnatal 25 dpp (round spermatids) and onwards. By using in situ hybridization (ISH) and flow cytometry-fluorescent ISH, only the haploid spermatids yielded the positive AEP1 signal. Immunohistochemistry showed that AEP1 was expressed in the acrosomal cap of late-staged germ cells in rat testis, and co-localized with the acrosomal marker, peanut agglutinin. The spatial expression of AEP1 immunoreactivity in testis was conserved among diverse mammalian species (rat, pig, monkey, human). To further study its roles in spermatogenesis, we showed AEP1 and beta-actin was associated together in complex by co-immunoprecipitation in adult germ cells and by immunofluorescence assay in isolated spermatozoon. In human testes diagnosed with hypospermatogenesis, lower expression of AEP1 was observed, whereas there was no detectable signal in undescended testes. In short, AEP1 is an evolutionary-conserved acrosome-specific gene and likely functions in acrosome-cap formation.
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Affiliation(s)
- John M Luk
- Department of Surgery, The University of Hong Kong, Jockey Club Clinical Research Center, 21 Sassoon Road, Pokfulam, Hong Kong.
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Shi JJ, Ma XH, Diao HL, Ni H, Xu LB, Zhu H, Yang ZM. Differential expression of prostaglandin E receptor subtype EP2 in rat uterus during early pregnancy. Histol Histopathol 2006; 20:1021-8. [PMID: 16136483 DOI: 10.14670/hh-20.1021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
PGE2 is essential for mammalian female reproduction. This study was to examine the expression of EP2 gene in the rat uterus during early pregnancy, delayed implantation and artificial decidualization by in situ hybridization and immunohistochemistry. There was no detectable EP2 mRNA expression in the uterus from days 1 to 4 of pregnancy (day 1 = day of vaginal sperm). A low level of EP2 immunostaining was observed in the luminal and glandular epithelium from days 1 to 4 of pregnancy. Both EP2 mRNA and protein expression were highly detected in the luminal epithelium at implantation sites on day 6 of pregnancy. EP2 expression decreased from day 7 of pregnancy and was undetectable on days 8 and 9 of pregnancy. After delayed implantation was terminated by estrogen treatment and the embryo implanted, both EP2 mRNA and protein expression were strongly observed in the luminal epithelium at the implantation site. There was no detectable EP2 expression in both control and decidualized uteri. In conclusion, these data suggest that EP2 expression at implantation site may play an important role during embryo implantation in rats.
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Affiliation(s)
- J J Shi
- College of Life Sciences, Northeast Agricultural University, Harbin, China
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41
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Xie JJ, Xu LY, Zhang HH, Cai WJ, Mai RQ, Xie YM, Yang ZM, Niu YD, Shen ZY, Li EM. Role of fascin in the proliferation and invasiveness of esophageal carcinoma cells. Biochem Biophys Res Commun 2005; 337:355-62. [PMID: 16185662 DOI: 10.1016/j.bbrc.2005.09.055] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2005] [Accepted: 09/08/2005] [Indexed: 01/12/2023]
Abstract
Fascin, an actin-bundling protein, induces membrane protrusions and increases cell motility in various transformed cells. The overexpression of fascin in esophageal squamous cell carcinoma (ESCC) has been described only recently, but the roles and mechanism still remained unclear. Here, by using RNA interference (RNAi), we have stably silenced the expression of the fascin in EC109 cells, an ESCC cell line. Down-regulation of fascin resulted in a suppression of cell proliferation and as well as a decrease in cell invasiveness. Furthermore, we revealed that fascin might have functions in regulating tumor growth in vivo. The effect of fascin on cell invasiveness correlated with the activation of matrix metalloproteases such as MMP-2 and MMP-9. We examined that fascin down-expression also led to a decrease of c-erbB-2 and beta-catenin at the protein level. These results suggested that fascin might play crucial roles in regulating neoplasm progression of ESCC.
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Affiliation(s)
- J J Xie
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, Shantou 515041, PR China
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Yang ZM, Wang L, Yuan J, Shen J, Lin SC. Synthetic studies on nonthrombogenic biomaterials 14: synthesis and characterization of poly(ether-urethane) bearing a Zwitterionic structure of phosphorylcholine on the surface. J Biomater Sci Polym Ed 2004; 14:707-18. [PMID: 12903738 DOI: 10.1163/156856203322274950] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A new Zwitterionic compound of the phosphorylcholine analogue, 4-hydroxylbutyl phosphorylcholine (HBPC), was synthesized and characterized. HBPC was chemically tethered onto the surface of poly(ether-urethane) (PEU) films with hexamethylene diisocyanate (HDI) as a coupling agent. The existence of a phosphorylcholine structure on the PEU surface was demomstrated by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FT-IR), X-ray photoelectron spectroscopy (XPS) and water contact angle measurements. The nonthrombogenicity of the modified films was evaluated by platelet-rich plasma (PRP) assay. The results showed that films grafted with HBPC have excellent platelet adhesion resistance.
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Affiliation(s)
- Z M Yang
- Research Center of Surface Interface Science and Technology, Nanjing University, Nanjing 210093, P.R. China
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Yang ZM, Rao SC, Xiang Z. [Allogeneic humeral shaft transplantation with vascular anastomosis: twenty years follow-up]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:354-7. [PMID: 11762222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To sum up the clinical results of allogeneic humeral transplantation with vascular anastomosis, and evaluate the clinical significance. METHODS From September to November 1979, 1 case with humeral shaft defect of 10 cm in length and 2 cases with tibia shaft defect of 12 cm in length were repaired by allogeneic humeral transplantation with vascular anastomosis. Azathiopurine and prednisone were applied for 3 months postoperatively. All cases were followed up for 20 years. RESULTS Case 1 recovered well with good bone union and reconstruction after operation, and could work normally. In case 2, five chronic rejections were occurred during 3 years after operation, and recovered after treatment, the allograft bone was fractured after 2 years of operation, and unioned by autogeneous iliac bone transplantation. In case 3, the distal part of allograft bone was fractured after 46 months, and unioned by autogeneous iliac bone transplantation. The middle part of allograft bone was non-unioned after 20 years follow-up in case 3, but the patient could still work normally. CONCLUSION The clinical results of allogeneic long bone transplantation can be improved by rational tissue matching test, application of effective immunosuppressive drugs in a certain period according to the principles of modern transplantation immunology.
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Affiliation(s)
- Z M Yang
- Department of Orthopedic Surgery, First University Hospital, West China University of Medical Sciences, Chengdu Sichuan, P. R. China 610041.
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Xie CJ, Ni ZF, Sun QX, Yang ZM, Liu BS, Wei YL. [Molecular tagging of a major powdery mildew resistance gene MlG in wheat derived from wild Emmer by using microsatellite marker]. Yi Chuan Xue Bao 2001; 28:1034-9. [PMID: 11725638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Powdery mildew caused by Erysiphe graminis f. sp. tritici is one of the most important wheat diseases in many regions of the world. Breeding for resistant cultivars has been proved to be an effective and environmentally safe method to control diseases in wheat production. It is necessary to search for more resistance genes for the diversification of resistance genes in wheat breeding. An Isreali wild emmer wheat (Triticum dicoccoides) accession "G-305-M" was found resistant to the prevailing E. graminis f. sp. tritici isolate Race No. 15 in Beijing region. The powdery mildew resistance has been transferred from G-305-M into common wheat by crossing and backcrossing (G-305-M/781//Jing 411* 3). Genetic analysis showed that the resistance was controlled by a single dominant gene at the seedling stage. A segregating BC2F3 family of the cross "G-305-M/781//Jing 411* 3" with 167 plants was chosen for SSR analysis. Totally 96 wheat microsatellite primer pairs were screened, only one primer pair WMS570 could generate polymorphic DNA fragments between the resistant and susceptible plants. After evaluating this polymorphic marker in the segregating population, the microsatellite locus Xgwm570 mapped on chromosome 6AL was found to be linked to the resistance gene, with the estimated genetic distance of 14.9 +/- 3.0 cM. Based on the origin and chromosomal location of the gene, it is suggested that the resistance gene derived from G-305-M should be a novel Pm gene and is temporarily designated MlG.
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Affiliation(s)
- C J Xie
- College of Crop Science, China Agricultural University, Beijing 100094, China
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Yang ZM, Cen SQ, Xie HQ. [The proliferation and differentiation of primary human embryonic skeletal myoblasts]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:261-4. [PMID: 11761849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To observe the proliferation and differentiation properties of primary human embryonic skeletal myoblasts cultured in vitro. METHODS The skeletal muscle samples were obtained from 20 to 25-week abortion fetus, the family history of inherited myopathies of parental generation was negative. With a modified method of Blau, the muscle sample was digested with trypsin and collagenase. The isolated cell suspension was a mixture of myoblasts and fibroblasts, the latter was removed by repeated attachment to culture dishes. The morphological, immunohistochemical observation, the proliferation and differentiation of primary myoblasts were studied. RESULTS The isolated myoblasts were spherical in cell suspension and spindle-like after attached to culture dishes. The myosin specialized immunohistochemical staining was strongly positive. A large quantity of skeletal muscle specialized creatine kinase (CK-MM) was synthesized in cultured myoblasts. Additionally, while the cell density of myoblasts increased, the monocyte myoblasts would fused to form multinucleated myotube. All those indicated that the cultured cells were myoblasts. Primary myoblasts proliferated quickly, the doubling time, measured in growth curve, was 4.8 days. CONCLUSION A large number of myoblasts can be available with digestion and repeated attachment method. The cultured cells can be proved as myoblasts by morphological and immunohistochemical detection. The cultured myoblasts have good ability of proliferation and differentiation.
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Affiliation(s)
- Z M Yang
- Department of Orthopedic Surgery, First University Hospital, West China University of Medical Sciences, Chengdu Sichuan, P. R. China 610041
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46
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Wang J, Yang ZM. [Advance on repair of growth plate injury]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:291-4. [PMID: 11761856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To sum up the studying course and latter development of repair of injury of growth plate. METHODS Recent original articles about repair of injury of growth plate were extensively reviewed, focused on the progresses in understanding repair of injury of growth plate and comparison of several major reparative methods. RESULTS Repair of injury of growth plate is a great difficulty in experimental study and clinical treatment of pediatric orthopedics. Graft of free growth plate and cartilage were unfavorably used because of lack of blood supplement. Although graft of vascularized growth plate solved circulation problem, both two kinds of grafts were involved in limitation of donor and immunologic reaction. Non-cartilaginous tissue and material could only prevent formation of bony bridge in small defect of growth plate and lacked ability of regenerative repair. Transfer of tissue engineered cartilage might be the best choice for repair of injury of growth plate. CONCLUSION Considering source of transplanted material, reparative effect and adverse reaction, repair of injury of growth plate with tissue engineered cartilage deserves further investigation.
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Affiliation(s)
- J Wang
- Department of Orthopedic Surgery, First University Hospital, West China University of Medical Sciences, Chengdu Sichuan, P. R. China 610041
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47
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Yang H, Wong JW, Yang ZM, Zhou LX. Ability of Agrogyron elongatum to accumulate the single metal of cadmium, copper, nickel and lead and root exudation of organic acids. J Environ Sci (China) 2001; 13:368-375. [PMID: 11590773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Agrogyron elongatum were grown in nutrient solution containing moderate to high amounts of separate heavy metal of Cd, Cu, Ni and Pb in a greenhouse for a 9-day. Cd, Cu, Ni and Pb generally led to decrease in the elongation of roots although the length of seedlings exposed to Cd and Pb at 0.05 and 0.5 mg/L showed to be slightly greater than that of controls. Of the four metals in the experiment, Pb was absorbed and accumulated to the highest level, with the concentrations of 92,754 mg/kg dry weight (DW) in roots and 11,683 mg/kg DW in shoots. Cd was moderately accumulated in Agrogyron elongatum, but the maximum bioaccumulation coefficients (BCs) for roots and shoots were observed. The patterns for Cu and Ni uptake and distribution in plants differed from those of Pb and Cd, as it was showed that the shoot accumulation of Cu and Ni was significantly higher than in roots. A. elongatum had the highest Ni concentration in shoots (30,261 mg/kg DW) at the external concentration of 250 mg/L. Cu ranked second, with a shoot concentration of 12,230 mg/kg DW when 50 mg/L Cu in solution was applied. For the four trace elements tested, the highest concentrations in shoots decreased by the order of Ni > Cu > Pb > Cd (mg/kg DW), and those in roots were Pb > Cd > Ni > Cu (mg/kg DW). Malic, oxalic and citric acids exuded by roots exposed to 1 and 50 mg/L of the metals were detected. Release of organic acids from plants significantly differed among the metal treatments. Cu was most effectively in inducing root exudation of the three types of organic acids. Cd, and Ni were also the inducers of secretion of malic and oxalic acids. With reference of Pb, a small amounts of malic and oxalic acids were detected in the root exudates, but few quantities of citric acid were found. However, no correlation between alternations in root exudation of organic acids and metal accumulation could be established.
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Affiliation(s)
- H Yang
- College of Science, Nanjing Agricultural University, Nanjing 210095, China
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Li YL, Yang ZM, Xie HQ. [Cellular compatibility of three natural xenogeneic bone derived biomaterials]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:227-31. [PMID: 11488032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE To evaluate the cellular compatibility of three natural xenogeneic bone derived biomaterials. METHODS Three types of natural xenogeneic bone derived biomaterials were made with physical and chemical treatment, composite fully deproteinized bone(CFDB), partially deproteinized bone(PDPB) and partially decalcified bone(PDCB). Three types biomaterials were cocultured with human embryonic periosteal osteoblasts. The cell growth, attachment, cell cycle, alkaline phosphatase activity were detected to evaluate the cellular compatibility to biomaterials. RESULTS Osteoblasts attached on all three biomaterials and grew well, the effect of three biomaterials on cell proliferation was PDCB > PDPB > CFDB. The cell cycle was not obviously affected by three biomaterials. The effect of three biomaterials on alkaline phosphatase activity of osteoblasts was PDCB > PDPB > CFDB. CONCLUSION CFDB,PDPB,PDCB have good cellular compatibility without cytotoxic and tumorigenicity, CFDB is the best. The three biomaterials can be used as scaffold materials of bone tissue engineering.
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Affiliation(s)
- Y L Li
- Department of Orthopedic Surgery, First University Hospital, West China University of Medical Sciences, Chengdu Sichuan, P. R. China 610041
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Xie HQ, Yang ZM, Qu Y. [Proliferation properties and telomerase activity of human embryonic tendon cells transformed by ptsA58H plasmid]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:171-5. [PMID: 11393961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
OBJECTIVE To analysis the proliferation properties and telomerase activity of human embryonic tendon cells transformed by ptsA58H plasmid cultured in vitro continuously. METHODS The 40th, 70th, and 75th passages of transformed human embryonic tendon cells (THETC) were adopted. The collagen secretion of THETC was detected by immunohistochemical methods, the growth curve of different passages of THETC was compared, and chromosome karyotype was analyzed. Total RNA of THETC were extracted to detect human telomerase reverse transcriptase (hTERT) mRNA expression by RT-PCR technique. RESULTS When THETC were subcultured to 70 passages, the morphological characteristics of cells changed and began replicative senescence. THETC still could secret type I collagen normally. The chromosome of THETC was heteroploid (2n = 94). There were no hTERT mRNA expression. CONCLUSION SV40 transfection can not make human embryonic tendon cells immortalization, on the other hand, human embryonic tendon cells transformed by ptsA58H plasmid has no tendency of malignant transformation.
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Affiliation(s)
- H Q Xie
- Department of Orthopedic Surgery, First University Hospital, West China University of Medical Sciences, Chengdu Sichuan, P. R. China 610041.
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Qu YL, Yang ZM, Xie HQ. [The influence of tissue engineered tendon on subgroup of T lymphocytes and its receptor in roman chickens]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:113-7. [PMID: 11286160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
OBJECTIVE To investigate the influence of tissue engineered tendon on subgroup of T lymphocytes and its receptor in Roman chickens. METHODS The flexor digitorum profundus of the third toes of right feet in 75 Roman chickens were resected and made 2.5 cm defects as experimental model. They were randomly divided into five groups according to five repair methods: no operation (group A), autograft (group B), fresh allograft (group C), polymer combined with allogenous tendon cells (group D), derived tendon materials combined with allogenous tendon cells (group E). The proliferation and transformation of lymphocytes and contribution of CD4+, CD8+, CD28 and T cell receptor (TCR) were detected to study the immune response. RESULTS The CD4+, CD8+ and TCR of group D and E were increased slightly than that of group B after 7 days, while after 14 days, those data decreased gradually and no significant difference between tissue engineered tendon and autografts (P > 0.05), and there was significant difference between fresh allograft and tissue engineered tendon (P < 0.05). Lymphocytes transformation induced by conA also showed no significant difference between tissue engineered tendon and autografts (P > 0.05). CONCLUSION Tendon cells are hypoantigen cells, there are less secretion of soluble antigen or antigen chips dropped out from cells. Tissue engineered tendon has excellent biocompatibility.
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Affiliation(s)
- Y L Qu
- Department of Orthopedic Surgery, First University Hospital, West China University of Medical Sciences, Chengdu Sichuan, P, R, China 610041.
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