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Meng W, Shen JJ, Liang TY, Wu Q, Wang LB, Huang D, Xu FP, Bai JY, Yang XJ, Shen PC. Gubentongluo decoction alleviates NLRP3 inflammasome in IgAN cell model. All Life 2023. [DOI: 10.1080/26895293.2022.2138560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Affiliation(s)
- Wei Meng
- Department of Clinical Laboratory, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Jiao-Jiao Shen
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Ting-Yu Liang
- Department of Pathology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Qing Wu
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Luo-Bing Wang
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Di Huang
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Fei-Peng Xu
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Jia-Yuan Bai
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Xue-Jun Yang
- TCM Institute of Kidney Disease, Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Pei-Cheng Shen
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
- Key Laboratory of Liver and Kidney Diseases, Shanghai University of Traditional Chinese Medicine, Ministry of Education, Shanghai, People’s Republic of China
- Shanghai Key Laboratory of Traditional Chinese Clinical Medicine (20DZ2272200), Shanghai, People’s Republic of China
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He C, Guo ZY, Chen WC, Liu YJ, Tang LF, Wang LB, Qian LL. [Diagnostic value of nasal nitric oxide for children with primary ciliary dyskinesia]. Zhonghua Er Ke Za Zhi 2023; 61:626-630. [PMID: 37385806 DOI: 10.3760/cma.j.cn112140-20230216-00106] [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: 07/01/2023]
Abstract
Objective: To evaluate the value of nasal nitric oxide (nNO) measurement as a diagnostic tool for Chinese patients with primary ciliary dyskinesia (PCD). Methods: This study is a retrospective study. The patients were recruited from those who were admitted to the respiratory Department of Respiratory Medicine, Children's Hospital of Fudan University from March 2018 to September 2022. Children with PCD were included as the PCD group, and children with situs inversus or ambiguus, cystic fibrosis (CF), bronchiectasis, chronic suppurative lung disease and asthma were included as the PCD symptom-similar group. Children who visited the Department of Child health Care and urology in the same hospital from December 2022 to January 2023 were selected as nNO normal control group. nNO was measured during plateau exhalation against resistance in three groups. Mann-Whitney U test was used to analyze the nNO data. The receiver operating characteristic of nNO value for the diagnosis of PCD was plotted and, the area under the curve and Youden index was calculated to find the best cut-off value. Results: nNO was measured in 40 patients with PCD group, 75 PCD symptom-similar group (including 23 cases of situs inversus or ambiguus, 8 cases of CF, 26 cases of bronchiectasis or chronic suppurative lung disease, 18 cases of asthma), and 55 nNO normal controls group. The age of the three groups was respectively 9.7 (6.7,13.4), 9.3 (7.0,13.0) and 9.9 (7.3,13.0) years old. nNO values were significantly lower in children with PCD than in PCD symptom-similar group and nNO normal controls (12 (9,19) vs. 182 (121,222), 209 (165,261) nl/min, U=143.00, 2.00, both P<0.001). In the PCD symptom-similar group, situs inversus or ambiguus, CF, bronchiectasis or chronic suppurative lung disease and asthma were significantly higher than children with PCD (185 (123,218), 97 (52, 132), 154 (31, 202), 266 (202,414) vs. 12 (9,19) nl/min,U=1.00, 9.00, 133.00, 0, all P<0.001). A cut-off value of 84 nl/min could provide the best sensitivity (0.98) and specificity (0.92) with an area under the curve of 0.97 (95%CI 0.95-1.00, P<0.001). Conclusions: nNO value can draw a distinction between patients with PCD and others. A cut-off value of 84 nl/min is recommended for children with PCD.
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Affiliation(s)
- C He
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Z Y Guo
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - W C Chen
- Department of Cardiothoracic Surgery, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Y J Liu
- Pediatric Clinical Research Center, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - L F Tang
- Department of Urology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - L B Wang
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - L L Qian
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
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Wang X, Ge T, Zhou T, Xia Q, Lu YM, Wang LB, Zhang T. [A case of Kabuki syndrome featuring biliary atresia due to KMT2D gene variation]. Zhonghua Er Ke Za Zhi 2023; 61:180-181. [PMID: 36720605 DOI: 10.3760/cma.j.cn112140-20220704-00613] [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: 02/02/2023]
Affiliation(s)
- X Wang
- Department of Gastroenterology, Hepatology and Nutrition, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - T Ge
- Department of Gastroenterology, Hepatology and Nutrition, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - T Zhou
- Department of Liver Transplantation, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 201114, China
| | - Q Xia
- Department of Liver Transplantation, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 201114, China
| | - Y M Lu
- Department of Pediatrics, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 201114, China
| | - L B Wang
- Respiratory Department, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - T Zhang
- Department of Gastroenterology, Hepatology and Nutrition, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
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Wu Q, Meng W, Shen JJ, Bai JY, Wang LB, Liang TY, Huang D, Shen PC. Guben Tongluo Formula Protects LPS-induced Damage in Lamina Propria B Lymphocytes Through TLR4/MyD88/NF-κB Pathway. Curr Med Sci 2022; 42:991-999. [PMID: 36107305 DOI: 10.1007/s11596-022-2622-4] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 06/24/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The main pathological feature of immunoglobulin A nephropathy (IgAN), an autoimmune kidney disease, is the deposition of IgA immune complexes, accompanied by mesangial cell proliferation and elevated urine protein. The Guben Tongluo formula (GTF) is a traditional Chinese medicine prescription, which has predominant protective effects on IgAN. However, the therapeutic mechanism of the GTF in IgAN remains elusive. The present study aimed to determine the effects of GTF in treating IgAN via regulating the TLR4/MyD88/NF-κB pathway. METHODS In the present study, lamina propria B lymphocytes were treated with different concentrations of lipopolysaccharide (LPS) (0, 1, 5, 10 and 20 ng/mL). Flow cytometry was used to define positive CD86+CD19+ cells. CCK-8 assay was used to examine cell proliferation. RNAi was used to induce TLR4 silencing. qRT-PCR and Western blotting were used to determine gene expression. RESULTS It was found that the LPS dose-dependently increased the content of IgA and galactose-deficient IgA1 (Gd-IgA), the levels of TLR4, Cosmc, MyD88 and phosphorylated (p)-NF-κB, and the ratio of CD86+CD19+ and IgA-producing B cells. However, the TLR4 knockdown reversed the role of LPS. This suggests that TLR4 mediates the effects of LPS on lamina propria B lymphocytes. Furthermore, the GTF could dose-dependently counteract the effects of LPS and TLR4 overexpression on lamina propria B lymphocytes through the TLR4/MyD88/NF-κB pathway. CONCLUSION Collectively, these results demonstrate that the GTF can regulate the TLR4/MyD88/NF-κB pathway to treat IgAN model lamina propria B lymphocytes stimulated by LPS.
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Affiliation(s)
- Qing Wu
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Wei Meng
- Department of Clinical Laboratory, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Jiao-Jiao Shen
- Department of Nursing, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Jia-Yuan Bai
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Luo-Bing Wang
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Ting-Yu Liang
- Department of Pathology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Di Huang
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Pei-Cheng Shen
- Department of Nephrology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
- Key Laboratory of Liver and Kidney Diseases, Shanghai, 201203, China.
- Key Laboratory of Liver and Kidney Diseases (Shanghai University of Traditional Chinese Medicine), Ministry of Education, Shanghai, 201203, China.
- Shanghai Key Laboratory of Traditional Chinese Clinical Medicine (20DZ2272200), Shanghai, 201203, China.
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Guo ZY, Chen JL, Wang LB, Qian LL. [Clinical phenotypes and genotypic spectrum of cystic fibrosis with pancreatic insufficiency in children]. Zhonghua Er Ke Za Zhi 2022; 60:915-919. [PMID: 36038301 DOI: 10.3760/cma.j.cn112140-20220427-00384] [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: 06/15/2023]
Abstract
Objective: To investigate the clinical phenotypes and genotypic spectrum of exocrine pancreatic insufficiency in children with cystic fibrosis. Methods: This was a retrospective analysis of 12 children with cystic fibrosis who presented to Children's Hospital of Fudan University from December 2017 to December 2021. Clinical features, fecal elastase-1 level, genotype, diagnosis and treatment were systematically reviewed. Results: A total of 12 children, 7 males and 5 females, diagnosis aged 5.4 (2.0, 10.6) years, were recruited. Common clinical features included chronic cough in 12 cases, malnutrition in 7 cases, steatorrhea in 7 cases, bronchiectasis in 5 cases and electrolyte disturbance in 4 cases. Exocrine pancreatic insufficiency were diagnosed in 8 cases,the main clinical manifestations were steatorrhea in 7 cases, of which 5 cases started in infancy; 6 cases were complicated with malnutrition, including mild in 1 case, moderate in 2 cases and severe in 3 cases; 3 cases had abdominal distension; 2 cases had intermittent abdominal pain; 4 cases showed fatty infiltration or atrophy of pancreas and 3 cases showed no obvious abnormality by pancreatic magnetic resonance imaging or B-ultrasound. All 8 children were given pancreatic enzyme replacement therapy, follow-up visit of 2.3 (1.2,3.2) years. Diarrhea significantly improved in 6 cases, and 1 case was added omeprazole due to poor efficacy. A total of 20 variations of CFTR were detected in this study, of which 7 were novel (c.1373G>A,c.1810A>C,c.270delA,c.2475_2478dupCGAA,c.2489_c.2490insA, c.884delT and exon 1 deletion). Conclusions: There is a high proportion of exocrine pancreatic insufficiency in Chinese patients with cystic fibrosis. The main clinical manifestations are steatorrhea and malnutrition. Steatorrhea has often started from infancy. Pancreatic enzyme replacement therapy can significantly improve the symptoms of diarrhea and malnutrition.
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Affiliation(s)
- Z Y Guo
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - J L Chen
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - L B Wang
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - L L Qian
- Department of Respiratory Medicine, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
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Liu DG, Zhuang SX, Zhang CC, Wang LB. [Pulmonary alveolar microlithiasis caused by SLC34A2 gene compound heterozygous variations in a child]. Zhonghua Er Ke Za Zhi 2022; 60:715-716. [PMID: 35768363 DOI: 10.3760/cma.j.cn112140-20220320-00221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- D G Liu
- Department of General Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - S X Zhuang
- Department of General Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - C C Zhang
- Department of Respiratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - L B Wang
- Department of General Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
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Shi YY, Lu YM, Yan GF, Zheng ZQ, Zhang M, Zhang Y, Yu H, Zhang T, Chen YW, Wang LB, Zhou JG, Zhou W. [Severe pneumonia caused by coinfection of SARS-CoV-2 Omicron variant and Mycoplasma pneumoniae in a child]. Zhonghua Er Ke Za Zhi 2022; 60:600-602. [PMID: 35582946 DOI: 10.3760/cma.j.cn112140-20220430-00400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Y Y Shi
- Department of Respiratory Medicine,Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Y M Lu
- Department of Pediatrics, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 201112, China
| | - G F Yan
- Pediatric Intensive Care Unit,Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Z Q Zheng
- Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - M Zhang
- Department of Respiratory Medicine,Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Y Zhang
- Department of Infectious Disease, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - H Yu
- Department of Infectious Disease, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - T Zhang
- Department of Gastroenterology, Hepatology and Nutrition, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, China
| | - Y W Chen
- Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, National Children's Medical Center, Shanghai 200127, China
| | - L B Wang
- Department of Respiratory Medicine,Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - J G Zhou
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Wenhao Zhou
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
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Zhou CF, Wang LB, Shen MZ, Guo Y, Wang FQ, Li K, Li B, Zhao SH, Zhang Z, Fu SH, Wang GY, Tian JW. [A case report of complex patent ovale foramen closure guided by intracardiac ultrasound]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:1143-1145. [PMID: 34775726 DOI: 10.3760/cma.j.cn112148-20211009-00864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- C F Zhou
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - L B Wang
- Department of Ultrasound, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - M Z Shen
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - Y Guo
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - F Q Wang
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - K Li
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - B Li
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - S H Zhao
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - Z Zhang
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - S H Fu
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
| | - G Y Wang
- Department of Cardiology, First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100080, China
| | - J W Tian
- Department of Cardiology, Hainan Hospital, Chinese People's Liberation Army General Hospital, Sanya 517200, China
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Wu FW, Wang LB, Li BF, Yan XL, Zi JR, Peng J, Cai X, Bao XY, Yang YM. [Prevalence of human soil-borne nematode infections in Yunnan Province: a cross-sectional study in 2015]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:513-517. [PMID: 34791851 DOI: 10.16250/j.32.1374.2021112] [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: 06/13/2023]
Abstract
OBJECTIVE To investigate the current prevalence of human soil-borne nematode infections in Yunnan province, so as to provide the scientific evidence for formulating the soil-borne nematodiasis control strategy in the province. METHODS In 2015, a total of 20 survey sites were sampled in 10 counties (cities) of Yunnan Province using the stratified cluster random sampling method. Stool samples were collected from all local permanent residents at ages of one year and older in each survey site, and the soil-borne nematode eggs were identified using the modified Kato-Katz technique and the egg number was counted. In addition, the hookworm species was identified using the filter-paperculture method, and Enterobius vermicularis eggs were detected using the cellophane tape method in children at ages of 3 to 6 years. RESULTS A total of 5 067 residents received stool examinations, and 950 residents were detected with soil-borne nematode infections, with an overall prevalence rate of 18.75%. The prevalence of Ascaris lumbricoides, Trichuris trichura and hookworm was 7.52%, 8.47% and 9.02%, respectively. Among 446 children detected using the cellophane tape method, 5 children were detected with E. vermicularis infections. Among the 160 residents with hookworm infections, there were 139 residents with Necator americanus infections (86.88%), 16 with A. duodenale infections (10.00%) and 5 with mixed infections (3.12%). Mild A. lumbricoides (67.98%, 259/381), T. trichura (88.58%, 380/429) and hookworm infections (94.53%, 432/457) were predominant. Among the four ecological zones, the highest prevalence of human soilborne nematode infections was found in the East Tibet-South Sichuan Ecological Zone (31.79%), and among the 10 survey counties (cities), the greatest prevalence was seen in Gongshan Derung and Nu Autonomous County (50.13%), while the lowest prevalence was found in Ninglang Yi Autonomous County (0.40%). The prevalence of human soil-borne nematode infections was 5.67% (43/759), 26.67% (610/2 287) and 14.70% (297/2 021) in high-, moderate- and low-economic-level regions, respectively. There were no significant differences in the prevalence of human soil-borne nematode infections in terms of ecological regions, survey counties (cities) or economic development levels (χ2 = 342.20, 814.60 and 201.34, all P < 0.05). There was no significantdifference in the prevalence of human soil-borne nematode infections between male (18.21%, 441/2 422) and female residents (19.24%, 509/2 645) (χ2 = 0.89, P > 0.05), and soil-borne nematode infections were detected in residents at all age groups, with the greatest prevalence found in residents at ages of 1 to 9 years (25.88%). In addition, the highest prevalence of soil-borne nematode infections was seen in residents with the Dulong Ethnic Minority (82.09%), in preschool children (25.06%) and in illiterate residents (24.80%), and there was no age-, ethnicity-, occupation- or education level-specific prevalence of soil-borne nematode infections detected (χ2 = 46.50, 1 016.96, 36.33 and 52.43, all P < 0.05). CONCLUSIONS The prevalence of human soil-borne nematode infections remains high in Yunnan Province. The management of soil-borne nematodiasis requires to be reinforced among low-age children, farmers, old people and residents with low educations levels or ethnic groups.
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Affiliation(s)
- F W Wu
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | | | - B F Li
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - X L Yan
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - J R Zi
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - J Peng
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - X Cai
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - X Y Bao
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - Y M Yang
- Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
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Zhang N, Xu FJ, Lang J, Wang LB, Wang JM, Sun YH, Liu BY, Xie N, Fang XZ, Yang XL, Kang XN, Wang XQ, Qin ZX, Ge WK, Shen B. Improved light extraction efficiency of AlGaN deep-ultraviolet light emitting diodes combining Ag-nanodots/Al reflective electrode with highly transparent p-type layer. Opt Express 2021; 29:2394-2401. [PMID: 33726435 DOI: 10.1364/oe.416826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
Enhancement of light extraction efficiency (LEE) of AlGaN-based deep-ultraviolet (DUV) light emitting diodes (LEDs) has been attempted by adopting Ag-nanodots/Al reflective electrodes on a highly transparent complex p-type layer. By thinning the p-GaN to several nm, highly DUV transparent p-type layer is achieved, making it meaningful for the application of reflective electrodes composed of Ag-nanodots and Al film to allow most light emitted upward to be reflected back to the sapphire side. By this approach, the maximum light output power and external quantum efficiency of the DUV-LEDs with optimized Ag nanodots/Al electrodes are severally increased by 52% and 58%, respectively, compared to those with traditional Ni/Au electrodes when the current is below 200 mA.
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Fu WJ, Hu XX, Wang LB, Zhang Y, Yang D, Zhang WP, Chen J, Wang JM, Yang JM. [Extramedually biliary relapse of Ph positive B lymphoblastic leukemia after allogeneic hematopoietic stem cell transplantation: a case report]. Zhonghua Xue Ye Xue Za Zhi 2020; 40:879. [PMID: 31775494 PMCID: PMC7364974 DOI: 10.3760/cma.j.issn.0253-2727.2019.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- W J Fu
- Department of Hematology, Changhai Hospital, the Second Military Medical University, Shanghai 200433, China
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Huang AJ, Wang LB, Du J, Tang GS, Cheng H, Gong SL, Gao L, Qiu HY, Ni X, Chen J, Chen L, Zhang WP, Wang JM, Yang JM, Hu XX. [Efficacy of Hyper-CVAD/MA and CHALL-01 regimens in the treatment of Philadelphia chromosome-positive adult acute lymphoblastic leukemia patients under 60 years old]. Zhonghua Xue Ye Xue Za Zhi 2019; 40:625-632. [PMID: 31495127 PMCID: PMC7342869 DOI: 10.3760/cma.j.issn.0253-2727.2019.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Objective: To compare the difference of efficacy between traditional Hyper-CVAD/MA regimen and the adolescents inspired chemotherapy regimen, CH ALL-01, in treatment of adult Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph(+) ALL) . Methods: In this study we retrospectively analyzed 158 Ph(+) ALL patients receiving Hyper-CVAD/MA regimen (n=63) or CHALL-01 regimen (n=95) in our center and Changzheng hospital from January 2007 to December 2017, excluding patients with chronic myeloid leukemia in blast crisis. Tyrosine kinase inhibitor (TKI) was administered during induction and consolidation chemotherapy. Patients who underwent hematopoietic stem cell transplantation received TKI as maintenance therapy. Results: Of them, 91.1% (144/158) patients achieved complete remission (CR) after 1-2 courses of induction. CR rate was 90.5% (57/63) for patients in Hyper-CVAD/MA group and 91.6% (87/95) for patients in CHALL-01 group. There was no difference in CR rates between the two groups (χ(2)=0.057, P=0.811) . The last follow-up was June 2018. A cohort of 134 CR patients could be used for further analysis, among them, 53 patients received Hyper-CVAD/MA regimen and other 81 patients received CHALL-01 regimen. The molecular remission rates were significantly higher in CHALL-01 group (complete molecular response: 44.4%vs 22.6%; major molecular response: 9.9% vs 18.9%) (χ(2)=7.216, P=0.027) . For the patients in Hyper-CVAD/MA group, the 4-year overall survival (OS) was 44.81% (95%CI: 30.80%-57.86%) and the 4-year disease free survival (DFS) was 37.95% (95%CI: 24.87%-50.93%) . For patients received CHALL-01 regimen, the 4-year OS was 55.63% (95%CI: 39.07%-69.36%) (P=0.037) and 4 year DFS was 49.06% (95%CI: 34.24%-62.29%) (P=0.015) , while there was no significant difference in 4 year cumulative incidence of relapse (CIR) (P=0.328) or cumulative incidence of nonrelapse mortality (CI-NRM) (P=0.138) . The rate of pulmonary infection was lower in patients received CHALL-01 regimen compared with patients received Hyper-CVAD regimen (43.4% vs 67.9%, χ(2)=7.908, P=0.005) . Conclusions: Outcome with CHALL-01 regimen appeared better than that with the Hyper-CVAD/MA regimen in Ph(+) ALL, which has lower incidence of pulmonary infection, higher molecular remission rate and better OS and DFS.
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Affiliation(s)
- A J Huang
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - L B Wang
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - J Du
- Department of Hematology, Changzheng Hospital, Second Military Medical University, Shanghai 200433, China
| | - G S Tang
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - H Cheng
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - S L Gong
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - L Gao
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - H Y Qiu
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - X Ni
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - J Chen
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - L Chen
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - W P Zhang
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - J M Wang
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - J M Yang
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - X X Hu
- Department of Hematology, Institute of Hematology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
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13
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Wang LB, Pan D, Huang GY, Zhao J, Kang N, Xu HQ. Crossover from Coulomb blockade to ballistic transport in InAs nanowire devices. Nanotechnology 2019; 30:124001. [PMID: 30566928 DOI: 10.1088/1361-6528/aaf9d4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report on the observation of a crossover from the single electron Coulomb blockade regime to the ballistic transport in individual InAs semiconducting nanowire devices. The InAs nanowires studied here were grown by molecular-beam epitaxy (MBE), which provides a clean system to study the intrinsic electrons transport in a quasi-one-dimensional system. Quantized conductance plateaus are observed for an InAs nanowire-based device by changing the Fermi level with a global back gate at low temperature, suggesting the ballistic transport of electrons. Further lowering the temperature, we observe the Coulomb blockade phenomenon with the formation of the quantum dot between the two normal metal contacts. By increasing the electron density, the characteristic Fabry-Pérot oscillations are observed, which further provides evidence for the ballistic nature of transport in the InAs nanowire device. Our observations indicate that high-quality InAs nanowires grown by MBE behave as clean quantum wires at low temperatures, which enables us to investigate novel phenomena in the quasi-one-dimensional system.
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Affiliation(s)
- L B Wang
- Beijing Key Laboratory of Quantum Devices, Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, People's Republic of China
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14
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Xu J, Bai X, Wang LB, Shi HN, van der Giessen JWB, Boireau P, Liu MY, Liu XL. Influence of adjuvant formulation on inducing immune response in mice immunized with a recombinant serpin from Trichinella spiralis. Parasite Immunol 2017; 39. [PMID: 28445612 DOI: 10.1111/pim.12437] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 04/20/2017] [Indexed: 11/29/2022]
Abstract
Nematodes of the genus Trichinella are one of the most widespread zoonotic pathogens on the world, and they can still cause major public health problems in many parts of the world. Vaccination against the helminth nematode Trichinella could be a good strategy to reduce the risk of human and animal infection. It was our aim to evaluate three adjuvants, which could be used as an efficient vaccine for animals in combination with rTs-Serpin antigen. In this study, BALB/c mice were vaccinated by an intramuscular route with rTs-Serpin antigen from the parasite Trichinella spiralis in combination with three different adjuvant formulations: Montanide ISA201, Montanide IMS 1313 N PR VG and Freund's complete adjuvant/Freund's incomplete adjuvant (FCA/FIA). The dynamics of IgG, IgM, IgE and cytokine production from spleen cells and worm reduction rate of the vaccinated mice were analysed. The results showed that rTs-serpin can induce partial protection against Trichinella larvae challenge in mice, when compared to the FCA-/FIA-formulated vaccination, the IMS1313 plus rTs-serpin mixture showed higher humoral immunity and similar levels of cellular immunity and worm reduction rate. The study suggested that Montanide IMS nanoparticles 1313 are as effective as FCA but less toxic; thus, Montanide IMS nanoparticles 1313 can be used as a good candidate of adjuvant for developing vaccine against Trichinella spiralis.
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Affiliation(s)
- J Xu
- Key Lab for Zoonoses Research, Ministry of Education, Institute of Zoonoses, Jilin University, Changchun, PR, China
| | - X Bai
- Key Lab for Zoonoses Research, Ministry of Education, Institute of Zoonoses, Jilin University, Changchun, PR, China
| | - L B Wang
- Key Lab for Zoonoses Research, Ministry of Education, Institute of Zoonoses, Jilin University, Changchun, PR, China
| | - H N Shi
- Mucosal Immunology Laboratory, Pediatric Gastroenterology Unit, Massachusetts General Hospital East, Boston, MA, USA
| | - J W B van der Giessen
- Centre for Zoonoses and Environmental Microbiology, National Institute for Public Health and the Environment, Amsterdam, The Netherlands
| | - P Boireau
- Key Lab for Zoonoses Research, Ministry of Education, Institute of Zoonoses, Jilin University, Changchun, PR, China.,Laboratory for Animal Health, Maisons Alfort, ANSES, INRA, ENVA, Universite Paris Est, Paris, France
| | - M Y Liu
- Key Lab for Zoonoses Research, Ministry of Education, Institute of Zoonoses, Jilin University, Changchun, PR, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, PR, China
| | - X L Liu
- Key Lab for Zoonoses Research, Ministry of Education, Institute of Zoonoses, Jilin University, Changchun, PR, China
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15
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Fan YJ, Grebenc T, Wei J, Zhao YL, Yan W, Wang LB. Association of ectomycorrhizal fungi with Picea crassifolia (Pinaceae, Piceoidae) from high-altitude stands in Mount Helan Nature Reserve, China. Genet Mol Res 2016; 15:gmr8604. [PMID: 27706692 DOI: 10.4238/gmr.15038604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We investigated the diversity of ectomycorrhiza associated with the endemic Picea crassifolia in Mount Helan National Nature Reserve in Inner Mongolia, China. Toward this objective, we conducted morphological and molecular identification of ectomycorrhizae in soil cubes taken from pure P. crassifolia stands. Eleven types of ectomycorrhizal (ECM) organisms were separated, briefly described, and identified. Nine morphotypes belonged to the phylum Basidiomycotina [Amphinema byssoides, Cortinarius sp (cf. limonius), Cortinarius vernus, Inocybe cf. nitidiscula, Inocybe sp 1, Sebacina incrustans, Sebacina sp, Suillus luteus, and Piceirhiza tuberculata x Picea crassifolia (comb. Nov.)], and two morphotypes to the phylum Ascomycotina (Cenococcum geophilum and Helvella sp). The diversity of ECM organisms in P. crassifolia was lower than that reported by other studies on spruce or pine forests, or on sporocarp diversity in the high-mountain forests of China. Most of the fungi in the rhizosphere did not correspond to species previously recorded as sporocarps above ground. Here, several new ectomycorrhiza morphotypes are proposed and described. We also confirmed the ectomycorrhizal status of the genus Sebacina (order Sebacinales).
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Abstract
Karst mountainous ecosystems are associated with karst rocky desertification (KRD), which can greatly impact soil structure and function. Despite the importance of soil microbes as a major factor maintaining ecosystem stability, we know little about the effect on soil fungal communities of KRD in karst regions. We investigated this relationship across a gradient of KRD soils from Guizhou, China by polymerase chain reaction and denaturing gradient gel electrophoresis (PCR-DGGE). Fungal diversity indices (Shannon-Wiener, richness, and evenness) significantly differed (P < 0.05) based on KRD severity, being lowest in moderately affected areas. Cluster analysis showed that the five sites examined clustered into two main groups according to KRD grade (high and low). Moreover, a homology search using sequences recovered from PCR-DGGE bands showed that the dominant fungi in each community varied remarkably, and included Aspergillus, Aphanoascus, Blastomyces, Fusarium, Glomus, Geomyces, Gibberella, Mortierella, Tetracladium, and Tumularia species, and an unclassified group. In conclusion, these findings demonstrate that KRD has a significant impact on soil fungal communities.
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Affiliation(s)
- P C Wang
- Guizhou Institute of Prataculture, Guiyang, China
| | - B T Mo
- Guizhou Institute of Prataculture, Guiyang, China
| | - Y Chen
- Guizhou Institute of Prataculture, Guiyang, China
| | - Q F Zeng
- Guizhou Institute of Prataculture, Guiyang, China
| | - L B Wang
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
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17
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Li S, Kang N, Fan DX, Wang LB, Huang YQ, Caroff P, Xu HQ. Coherent Charge Transport in Ballistic InSb Nanowire Josephson Junctions. Sci Rep 2016; 6:24822. [PMID: 27102689 PMCID: PMC4840339 DOI: 10.1038/srep24822] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 04/06/2016] [Indexed: 11/09/2022] Open
Abstract
Hybrid InSb nanowire-superconductor devices are promising for investigating Majorana modes and topological quantum computation in solid-state devices. An experimental realisation of ballistic, phase-coherent superconductor-nanowire hybrid devices is a necessary step towards engineering topological superconducting electronics. Here, we report on a low-temperature transport study of Josephson junction devices fabricated from InSb nanowires grown by molecular-beam epitaxy and provide a clear evidence for phase-coherent, ballistic charge transport through the nanowires in the junctions. We demonstrate that our devices show gate-tunable proximity-induced supercurrent and clear signatures of multiple Andreev reflections in the differential conductance, indicating phase-coherent transport within the junctions. We also observe periodic modulations of the critical current that can be associated with the Fabry-Pérot interference in the nanowires in the ballistic transport regime. Our work shows that the InSb nanowires grown by molecular-beam epitaxy are of excellent material quality and hybrid superconducting devices made from these nanowires are highly desirable for investigation of the novel physics in topological states of matter and for applications in topological quantum electronics.
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Affiliation(s)
- S Li
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
| | - N Kang
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
| | - D X Fan
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
| | - L B Wang
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
| | - Y Q Huang
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
| | - P Caroff
- I.E.M.N., UMR CNRS 8520, Avenue Poincaré, BP 60069, F-59652 Villeneuve d'Ascq, France
| | - H Q Xu
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China.,Division of Solid State Physics, Lund University, Box 118, S-221 00 Lund, Sweden
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18
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Fan D, Li S, Kang N, Caroff P, Wang LB, Huang YQ, Deng MT, Yu CL, Xu HQ. Formation of long single quantum dots in high quality InSb nanowires grown by molecular beam epitaxy. Nanoscale 2015; 7:14822-14828. [PMID: 26308470 DOI: 10.1039/c5nr04273a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report on realization and transport spectroscopy study of single quantum dots (QDs) made from InSb nanowires grown by molecular beam epitaxy (MBE). The nanowires employed are 50-80 nm in diameter and the QDs are defined in the nanowires between the source and drain contacts on a Si/SiO2 substrate. We show that highly tunable QD devices can be realized with the MBE-grown InSb nanowires and the gate-to-dot capacitance extracted in the many-electron regimes is scaled linearly with the longitudinal dot size, demonstrating that the devices are of single InSb nanowire QDs even with a longitudinal size of ∼700 nm. In the few-electron regime, the quantum levels in the QDs are resolved and the Landég-factors extracted for the quantum levels from the magnetotransport measurements are found to be strongly level-dependent and fluctuated in a range of 18-48. A spin-orbit coupling strength is extracted from the magnetic field evolutions of a ground state and its neighboring excited state in an InSb nanowire QD and is on the order of ∼300 μeV. Our results establish that the MBE-grown InSb nanowires are of high crystal quality and are promising for the use in constructing novel quantum devices, such as entangled spin qubits, one-dimensional Wigner crystals and topological quantum computing devices.
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Affiliation(s)
- Dingxun Fan
- Department of Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Peking University, Beijing 100871, China.
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19
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Xie SD, Xu CY, Shen JG, Jiang ZN, Shen JY, Wang LB. HER 2/neu protein expression in gastric cancer is associated with poor survival. Mol Med Rep 2015; 12:4794. [PMID: 26096440 DOI: 10.3892/mmr.2015.3955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Accepted: 08/19/2009] [Indexed: 11/05/2022] Open
Abstract
Mol Med Rep 2: [Related article:] 943–946, 2009; DOI: 10.3892/mmr_00000196
After the publication of the article, the authors noted that there was an error regarding the author list on the Pubmed website. J.Y. Shen was erroneously omitted from the data submitted for publication on the Pubmed website. We apologize for the oversight and possible misunderstanding.
The correct author list is the list that was published in PDF format on the Spandidos Publications website and in print, which is as follows: S.D. Xie1*, C.Y. Xu1,3*, J.G. Shen1, Z.N. Jiang2,3, J.Y. Shen1 and L.B. Wang1.
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Affiliation(s)
- S D Xie
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, P.R. China
| | - C Y Xu
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, P.R. China
| | - J G Shen
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, P.R. China
| | - Z N Jiang
- Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, P.R. China
| | - J Y Shen
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, P.R. China
| | - L B Wang
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, P.R. China
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20
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Wang PC, Zhao LL, Mo BT, Zhang Y, Chen J, Wang LB. Genetic diversity of Ceratoides arborescens, a species endemic to China, detected by inter-simple sequence repeat (ISSR). Genet Mol Res 2015; 14:5658-66. [PMID: 26125764 DOI: 10.4238/2015.may.25.18] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In order to investigate genetic diversity and population structure of Ceratoides arborescens, six populations were selected from different steppe types in Inner Mongolia grasslands of China. Inter-simple sequence repeat (ISSR) markers were used to assess the genetic diversity within and among natural populations of C. arborescens. Thirteen ISSR primers generated 154 discernible DNA bands, of which 151 (98.05%) were polymorphic. High genetic diversity was detected at the species level [percentage of polymorphic loci (PPB) = 98.05%; H = 0.2984; I = 0.4557], whereas, relatively low genetic diversity existed within populations (PPB = 80.62%; H = 0.2675; I = 0.4031). Analysis of molecular variance showed that variation existed mainly within populations (73.25%) rather than among populations (26.75%), which was in line with the high level of gene flow (Nm = 4.3332). The Mantel test found no significant correlation between genetic distance and geographic distance (r = 0.7522, P < 0.05). Six populations were clustered into two main groups, a desert steppe group and a typical steppe group.
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Affiliation(s)
- P C Wang
- Guizhou Institute of Prataculture, Guiyang, China
| | - L L Zhao
- College of Animal Science, Guizhou University, Guiyang, China
| | - B T Mo
- Guizhou Institute of Prataculture, Guiyang, China
| | - Y Zhang
- Guizhou Institute of Prataculture, Guiyang, China
| | - J Chen
- Research Institute of Forestry, Chinese Academy Forestry, Beijing, China
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Qin Q, Li H, Wang LB, Li AH, Ouyang J, Xie SQ, Liang ZH. A comparative study of the retention or removal of jejunal mucosa during pancreatic duct to jejunal anastomosis. MINERVA CHIR 2013; 68:399-407. [PMID: 24019048] [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: 06/02/2023]
Abstract
AIM The aim of this study was to compare the two anastomosis methods, that is, the retention or the removal of the jejunal mucosa during pancreatic duct to jejunal anastomosis after pancreaticoduodenectomy (PD). METHODS For this purpose, 46 PD patients were randomly and equally divided into groups A and B. In group A, the remnant pancreas was inserted 3 cm into the jejunum and the connecting part was sutured. In group B, the jejunal mucous membrane was cauterized 3 cm at the end, the remnant pancreas was sutured with the jejunal muscle layer, and the jejunum and pancreas were sutured together. RESULTS We found that in group A, the reoperation rate due to delayed bleeding was 13% (3/23) and the ulcer bleeding around anastomosis was 4.3% (1/23). In group B, the reoperation rate due to bleeding was 4.3% (1/23) and the incidence of postoperative pancreatic fistula was 17.4% (4/23). The duration of pancreaticojejunostomy operation in group A (46 ± 0.34 min) was shorter than in group B (P<0.001). CONCLUSION We, therefore, concluded that the pancreatic duct to jejunal anastomosis with retained jejunal mucosa was a simple and easy to perform method while it also excluded the risk of postoperative pancreatic fistula formation.
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Affiliation(s)
- Q Qin
- Department of Surgical Oncology, Tung Wah Affiliated Hospital of Sun Yat-sen University Dongguan, Guangdong, China -
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22
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Abstract
Spondyloepiphyseal dysplasia (SED) is an autosomal dominant skeletal dysplasia characterized by short stature, abnormal epiphyses and flattened vertebral bodies. SED is mainly caused by mutations in the gene encoding the type II procollagen α-1 chain (COL2A1). We looked for mutations in COL2A1 in three unrelated Chinese families with SED. Putative mutations were confirmed by RFLP analysis. We identified three missense mutations (p.G504S, p.G801S and p.G1176V) located in the triple-helical domain; p.G801S and p.G1176V are novel mutations. The p.G504S mutation has been associated with diverse phenotypes in previous studies. Our study extends the mutation spectrum of SED and confirms a relationship between mutations in the COL2A1 gene and clinical findings of SED.
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Affiliation(s)
- L H Cao
- Research Center for Medical Genomics, Key Laboratory of Cell Biology, Ministry of Public Health, Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, China
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Xie SD, Xu CY, Shen JG, Jiang ZN, Shen JY, Wang LB. HER 2/neu protein expression in gastric cancer is associated with poor survival. Mol Med Rep 2012; 2:943-6. [PMID: 21475925 DOI: 10.3892/mmr_00000196] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The presence of HER 2/neu has been reported in gastric cancer, but its impact on patient survival remains unclear. The purpose of this study was to investigate the expression of HER 2/neu in gastric cancer. A total of 218 paired resected gastric cancer and corresponding normal specimens were collected. HER 2/neu protein expression was assessed by immunohistochemical staining. The correlation between HER 2/neu expression and patient clinicopathological parameters was evaluated and the prognostic significance of HER 2/neu expression was assessed by univariate and multivariate analyses. Forty-one out of 218 (18.8%) gastric cancer specimens showed HER 2/neu-positive expression. No relationship was found between membranous HER 2/neu expression and clinicopathological parameters. However, HER 2/neu expression was correlated with poorer overall survival (p<0.001). In multivariate analysis, HER 2/neu expression was a significant independent prognostic predictor of gastric cancer (p<0.001), and was associated with poor survival in gastric cancer patients. These data indicate that HER 2/neu may play a major role in the therapeutic management of gastric cancer.
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Affiliation(s)
- S D Xie
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, P.R. China
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Cao LH, Wang LB, Wang SS, Ma HW, Ji CY, Luo Y. Identification of novel and recurrent mutations in the calcium binding type III repeats of cartilage oligomeric matrix protein in patients with pseudoachondroplasia. Genet Mol Res 2011; 10:955-63. [PMID: 21644213 DOI: 10.4238/vol10-2gmr1111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Pseudoachondroplasia is an autosomal dominant osteochondrodysplasia characterized by disproportionate short stature, joint laxity, and early onset osteoarthrosis. Pseudoachondroplasia is caused by mutations in the gene encoding cartilage oligomeric matrix protein (COMP). We looked for mutations in the COMP gene in three sporadic Chinese pseudoachondroplasia patients and identified two novel mutations, c.1189G>T (p.D397Y) and c.1220G>A (p.C407Y), and one recurrent mutation, c.1318G>C (p.G440R), in the calcium binding type III repeats of COMP. This study confirms the relationship between mutations of the COMP gene and clinical findings of pseudoachondroplasia; it also provides evidence for the importance of the calcium binding domains to the functioning of COMP.
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Affiliation(s)
- L H Cao
- Research Center for Medical Genomics, China Medical University, Shenyang, China
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Guo JL, Xu CY, Jiang ZN, Dong MJ, Xie SD, Shen JG, Cao J, Wang LB. Estrogen receptor beta variants mRNA expressions in gastric cancer tissues and association with clinicopathologic parameters. Hepatogastroenterology 2010; 57:1584-1588. [PMID: 21443125] [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: 05/30/2023]
Abstract
BACKGROUNDS/AIMS The aim of this study is to examine the expression of estrogen receptor beta-1, 2 ,5 in gastric cancer tissues and evaluate their correlation with clinicopathological features. METHODOLOGY Real-time quantitative PCR assay was applied to detect the expression of estrogen receptor beta-1, 2, 5 mRNAs in 44 gastric cancer tissues and their paired normal tissues and correlate their mRNA levels with the clinicopathological properties of the tumors. 2(deltaCT) method was used to obtain the relative quantity of target mRNA expression. RESULTS In almost all patients, estrogen receptor beta-1, 2, 5 mRNAs were expressed in gastric cancers and their matched normal tissues; however estrogen receptor beta-5 mRNA was not found in 8 normal gastric tissues. Estrogen receptor beta-5 had a much higher expression than estrogen receptor beta-1, 2 in gastric cancer tissues. Higher estrogen receptor beta-5 mRNAlevel was observed in gastric cancers than matched normal tissues (p = 0.001) and its increased expression was correlated with pTNM stage of the tumor (p = 0.032) and the lymph node metastasis (p = 0.026). Decreased mRNA level of estrogen receptor beta-1 was observed in gastric cancers compared to their matched normal tissues (p = 0.008). Estrogen receptor beta-1, 2 were not correlated with lymph node metastasis, gender, age, tumor size, tumor grade and pTNM stage (p > 0.05). CONCLUSIONS This is the first study investigating the clinicopathologic role of estrogen receptor beta variants in gastric cancer. Our study shows that estrogen receptor beta-5 is the most important factor for gastric cancer development and progression among the three estrogen receptor beta variants.
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Affiliation(s)
- J L Guo
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, China
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Xu CY, Guo JL, Jiang ZN, Xie SD, Shen JG, Shen JY, Wang LB. Prognostic role of estrogen receptor alpha and estrogen receptor beta in gastric cancer. Ann Surg Oncol 2010; 17:2503-9. [PMID: 20339947 DOI: 10.1245/s10434-010-1031-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2009] [Indexed: 12/12/2022]
Abstract
BACKGROUND The presence of estrogen receptor alpha (ERalpha) and estrogen receptor beta (ERbeta) have been reported in cell and tissue level in gastric cancer, but its impact on patients' survival remains unclear. This study was designed to investigate the expression level of ERalpha and ERbeta and to assess clinical significance of ERalpha and ERbeta expression in gastric cancer. METHODS The expression level of ERalpha and ERbeta were assessed by reverse-transcriptase polymerase chain reaction (RT-PCR) in 35 surgically resected gastric cancer and corresponding normal tissues and by immunohistochemical staining in 211 surgically resected gastric cancer and match normal tissues. RESULTS The expression level between ERalpha mRNA expression in gastric cancer tissues and match normal tissues had no statistically significant difference. The ERbeta mRNA level in normal tissues was significantly higher than that observed in gastric cancer tissues (P = 0.001). Neither ERalpha nor ERbeta mRNA expression levels had significant correlation with clinicopathologic parameters. Forty-eight of 211 (22.7%) gastric cancer tissues showed positive expression of ERalpha and ERbeta detected in gastric cancer. ERalpha-positive expression correlated with poorer overall survival (P = 0.014), as did the absence of ERbeta expression in patients with gastric cancer (P = 0.001). In multivariate analysis, the positive expression of ERalpha and the absence of ERbeta were significant independent prognostic factors for overall survival (hazard ratio 2.159, P = 0.013, and hazard ratio 2.016, P = 0.025 respectively). CONCLUSIONS Our results indicated that ERalpha and ERbeta were expressed in both gastric cancer and corresponding normal tissues. ERalpha expression and the absence of ERbeta expression are associated with poor survival.
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Affiliation(s)
- C Y Xu
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Xu CY, Shen JG, Shen JY, Chen WJ, Wang LB. Ulcer size as a novel indicator marker is correlated with prognosis of ulcerative gastric cancer. Dig Surg 2009; 26:312-6. [PMID: 19657193 DOI: 10.1159/000231881] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Accepted: 05/25/2009] [Indexed: 12/22/2022]
Abstract
AIMS The objective of this study was to assess the significance of ulcer size for the survival of gastric cancer patients. METHODS A total of 260 patients with ulcerative gastric cancer who had undergone curative resection were reviewed. The diameter of the malignant ulcer was measured. Patients were divided into group U1 (< or =3 cm) and group U2 (>3 cm) according to the diameter of the ulcer. The prognostic significance of ulcer size was assessed by uni- and multivariate analyses. RESULTS Patient survival was correlated with age, gender, tumor location, tumor size, ulcer size, serosal invasion, node involvement and synchronism distant metastasis. The 5-year overall survival rate in U1 patients was 84.3% as compared with 67.5% in U2 patients (p < 0.001), and the 5-year recurrence-free survival rates were 82.9% for group U1 and 62.5% for group U2 (p = 0.001). Multivariate analysis revealed that ulcer size is an independently significant predictive factor for survival rates (overall: hazard ratio 1.222, p = 0.003; recurrence-free: hazard ratio 1.205, p = 0.006). CONCLUSION Ulcer size might be a potential indicator for advanced disease and the use of minimal local treatments must be considered carefully in larger ulcer size patients.
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Affiliation(s)
- C Y Xu
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University College of Medicine, Hangzhou 310016, China
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Hao XL, Kuang H, Li YL, Yuan Y, Peng CF, Chen W, Wang LB, Xu CL. Development of an enzyme-linked immunosorbent assay for the alpha-cyano pyrethroids multiresidue in Tai lake water. J Agric Food Chem 2009; 57:3033-3039. [PMID: 19368347 DOI: 10.1021/jf803807b] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A general and broad class selective competitive enzyme-linked immunosorbent assay (ELISA) for the detection of the alpha-cyano pyrethroids was developed. One class specific hapten, the 5-(3-benzylphenyl)-5-cyanopentanoic acid (CPBA-BE), was conjugated with BSA as an immunogen. Polyclonal antibodies, PY-antibodies, were generated. The assay with the most selectivity for the family alpha-cyano pyrethroids such as cyphenothrin was further optimized and tested for tolerance to cosolvent, pH, and ionic strength changes. The IC(50) values of the optimized immunoassay were 4.58 microg L(-1) for cyphenothrin, 5.62 microg L(-1) for fenpropathrin, 7.08 microg L(-1) for deltamethrin, 10.72 microg L(-1) for cypermethrin, 19.95 microg L(-1) for flucythrinate, and 28.18 microg L(-1) for esfenvalerate. The cross-reactivities of cyphenothrin, fenpropathrin, deltamethrin, cypermethrin, flucythrinate, and esfenvalerate were 100%, 81.49%, 64.68%, 42.72%, 22.96%, and 16.25%, respectively. The low detection limit (LDL) of this assay was 0.107 microg L(-1) for cyphenothrin. This method was used for the detection of the alpha-cyano pyrethroids in Tai lake water.
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Affiliation(s)
- X L Hao
- School of Food Science and Technology, Jiangnan University, Wuxi, JiangSu, 214000, China
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Fan AY, Lao L, Zhang RX, Zhou AN, Wang LB, Moudgil KD, Lee DYW, Ma ZZ, Zhang WY, Berman BM. Effects of an acetone extract of Boswellia carterii Birdw. (Burseraceae) gum resin on adjuvant-induced arthritis in lewis rats. J Ethnopharmacol 2005; 101:104-9. [PMID: 15970410 DOI: 10.1016/j.jep.2005.03.033] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2004] [Revised: 03/29/2005] [Accepted: 03/29/2005] [Indexed: 05/03/2023]
Abstract
Ruxiang (Gummi olibanum), the dried gum resin of Boswellia carterii (BC), has been used in traditional Chinese medicine to alleviate pain and inflammation for thousands of years. In this random, blinded study, the anti-arthritic effects of a BC extract were observed and compared to vehicle control in a Lewis rat adjuvant arthritis model (n=8/group). Arthritis was induced by injecting CFA subcutaneously into the base of the tail, and the extract was administered orally (i.g.) for 10 consecutive days beginning on day 16 after the injection. Arthritic scores, paw edema, and the local tissue pro-inflammatory cytokines tumor necrosis factor alpha (TNF-alpha) and interleukin-1 beta (IL-1beta) were assessed. Toxicity and adverse effects of the extract were evaluated. At 0.90 g/kg per day, BC significantly decreased arthritic scores between days 20 and 25 (p<0.05) and reduced paw edema on days 18, 20 and 22 compared to control (p<0.05). It also significantly suppressed local tissue TNF-alpha and IL-1beta (p<0.05). No major adverse effects were observed in animals during the repeated-dose treatment profile although mild fur discoloration was noted. The data show that BC extract has significant anti-arthritic and anti-inflammation effects and suggest that these effects may be mediated via the suppression of pro-inflammatory cytokines.
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Affiliation(s)
- A Y Fan
- Center for Integrative Medicine, School of Medicine, University of Maryland, 3rd Floor, James Kernan Hospital Man, 2200 Kernan Drive, Baltimore, MD 21201, USA.
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Abstract
The effects of extracts from Ganoderma lucidum spores on the growth of human cervix uteri tumor HeLa cells as well as on the cell cycle and intracellular calcium level were investigated. Alcohol extracts were prepared from sporoderm-broken and sporoderm-nonbroken spores (termed extract I and extract II) of G. lucidum. Extract I was then subjected to silica gel chromatography to obtain extract III. Cytotoxicity was examined by means of trypan blue exclusion and MTT tests. It was found that extract I and extract III, but not extract II strongly inhibited the growth of HeLa cells, and that extract III was more effective than extract I. Moreover, extract III was shown to be capable of blocking the cell cycle at the transition from G1 to S phase and inducing a marked decrease of intracellular calcium level, determined by flow cytometry and the specific fluorescent calcium probe Fura-2, respectively. These results imply that (1) the breaking of G. lucidum spores improves the release of cytotoxic activity and (2) the effective extract might influence the cell cycle and cellular signal transduction by altering the calcium transport system.
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Affiliation(s)
- H S Zhu
- Research Center of Materials Science, Beijing Institute of Technology, China.
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Song YY, Xu YZ, Weng SF, Wang LB, Li XF, Zhang TF, Wu JG. Biological effects of rare earth protein complexes: influence of lanthanide ions Eu3+, Tb3+ on secondary structure of calmodulins. Biospectroscopy 1999; 5:371-7. [PMID: 10604289 DOI: 10.1002/(sici)1520-6343(1999)5:6<371::aid-bspy6>3.0.co;2-#] [Citation(s) in RCA: 13] [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: 11/11/2022]
Abstract
The secondary structure of four kinds of calmodulins (CaMs; i.e., Brassica campestris pollen CaM, bovine brain CaM, earthworm calcium binding protein, and earthworm new calcium binding protein) in thin films are determined by the FTIR resolution enhanced technique and curve fitting. The variation in the secondary structure of CaM upon its binding with Ca2+, Eu3+, and Tb3+, the assay of phosphodiesterase enzyme, and sodium dodecyl sulfate-polyacrylamide gel electrophoresis are also investigated. The effect of lanthanide ions on the conformation of CaM are described.
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Affiliation(s)
- Y Y Song
- Department of Chemistry, State Key Laboratory of Rare Earth Material Chemistry and Applications, Peking University, Beijing, People's Republic of China
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Reed TC, Wang LB, Wilson CJ, Ayer WA. Transitions in dental care coverage: a case study of patient satisfaction in managed care dental plans. Northwest Dent Res 1998; 6:24-32. [PMID: 9487925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abstract
The synthesis and reactions of glycopyranosyl heterocyclic ketene aminals were investigated. Under mild conditions, the benzoyl-substituted heterocyclic ketene aminals 3 or 4 underwent O-glycosylation with tetra-O-acetyl-alpha-D-glucopyranosyl bromide (1) using mercuric cyanide or silver trifluoromethanesulfonate as catalyst in acetonitrile to give O-glycopyranosyl heterocyclic ketene aminals 5-7 and 8-11, respectively. The beta-anomers were the sole products. By the O-glycosylation of heterocyclic ketene aminals with 1, the O-attack of heterocyclic ketene aminals was carried out for the first time. Some of 5-11 in the synthesis of oligosaccharides 14 and 15 can provide a valuable leaving group at the anomeric position of the glycopyranosyl ring. Compounds 6c or 10c may be potentially useful as glycosyl donors in the synthesis of oligosaccharides.
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Affiliation(s)
- Z J Li
- Institute of Chemistry, Academia Sinica, Beijing, People's Republic of China
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Du HY, Zhang WN, Zhang ZG, Shao Y, Wang LB, Wang JX, Wu FM. [Correlation between ability of learning-memory and synaptosomal free [Ca2+]i in mice of different age]. Sheng Li Xue Bao 1996; 48:43-7. [PMID: 8758689] [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: 02/02/2023]
Abstract
In the present investigation, the behavior of learning and memory of 1-month and 6-month-old mice was studied by using Y-maze and one-trial passive avoidance response device. The synaptosomal free [Ca2+]i of four main brain regions (Hippocampus, Cerebral cortex, Cerebellum, Tectum of midbrain) of these mice were measured by fluorescent probe Ca2+ indicator Fura-2 and an AR-CM-MIC cation measurement system. The results showed that, in comparison with 1-month-old mice, the ability of discrimination learning and memory of 6-month-old ones were attenuated, and the synaptosomal free [Ca2+]i of hippocampus was increased.
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Affiliation(s)
- H Y Du
- Department of Biological Science and Technology, Nanjing University
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Yuan YZ, Wang LB. [Nursing care of perioperative period for obstructive neonatal hepatitis]. Zhonghua Hu Li Za Zhi 1993; 28:89-90. [PMID: 8339359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Huang JT, Chen LC, Wang LB, Kim MH, Warshaw JA, Armstrong D, Zhu QY, Chou TC, Watanabe KA, Matulic-Adamic J. Fluorinated sugar analogues of potential anti-HIV-1 nucleosides. J Med Chem 1991; 34:1640-6. [PMID: 2033590 DOI: 10.1021/jm00109a017] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In order to obtain agents with therapeutic indices superior to those of AZT, FLT, or D4T, several analogues of anti-HIV-1 nucleosides were synthesized. These include 2',3'-dideoxy-2',3' -difluoro-5-methyluridine (13), its arabino analogue 19, arabino-5-methylcytosine analogue 21, 3'-deoxy-2',3'-didehydro-2' -fluorothymidine (25), 3'-azido-2',3'-dideoxy-2'-fluoro-5-methyluridine (29), 2'-azido-3'-fluoro-2',3'-dideoxy-5-methyluridine (31), and 2'3'-dideoxy-2' -fluoro-5-methyluridine (37). These new nucleosides were screened for their activity against HIV and feline TLV in vitro. None of the compounds showed significant activity. It is interesting to note that such a small modification in the sugar moiety of active anti-HIV nucleosides (i.e., displacement of hydrogen by fluorine) almost completely inactivate the agents.
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Affiliation(s)
- J T Huang
- Sloan-Kettering Institute for Cancer Research, Memorial Sloan-Kettering Cancer Center, Sloan-Kettering Division of Graduate School of Medical Sciences, Cornell University, New York, New York 10021
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Oelberg DG, Wang LB, Sackman JW, Adcock EW, Lester R, Dubinsky WP. Bile salt-induced calcium fluxes in artificial phospholipid vesicles. Biochim Biophys Acta 1988; 937:289-99. [PMID: 2827771 DOI: 10.1016/0005-2736(88)90251-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The ionic permeability of selected biological membranes is increased by bile salts. To examine changes in calcium permeability during the exposure of artificial membranes to bile salts, we investigated calcium uptake by unilamellar and multilamellar phospholipid vesicles. In the presence of 750 microM taurodeoxycholate, uptake of radiolabelled calcium by unilamellar vesicles increased 2.5-fold over control values. Calcium uptake by multilamellar vesicles as measured with a free calcium indicator, arsenazo III, increased 2.2- or 21-fold in the presence of 60 microM lithocholate or 3 beta-hydroxy-5-cholenoate, respectively. Results were directly influenced by experimental variables such as bile salt hydrophobicity, external calcium concentration, and the bile salt/lipid molar ratio. Observed membrane solubilization was minimal despite increased calcium permeability. Comparison of radiolabelled calcium uptake with radiolabelled sodium or radiolabelled rubidium uptake indicated that bile salt-dependent calcium uptake was 60-140-times greater than bile salt-dependent uptake of either monovalent cation. In an effort to delineate forces affecting calcium translocation, vesicles were exposed either to valinomycin, which induced an electrochemical gradient across the membrane, or to nigericin, which induced a proton gradient. Exposure to valinomycin minimally influenced bile salt-induced calcium uptake while exposure to nigericin significantly promoted uptake by 40-70%. The results suggest that bile salts promote calcium uptake by a mechanism which may be similar to those of other carboxylic ionophores.
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Affiliation(s)
- D G Oelberg
- University of Texas Medical School, Department of Pediatrics, Houston 77225
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Abstract
At high concentrations, bile salts induce hemolysis by comicellization of lipid components of the cell membrane. However, bile salts are also associated with hemolysis at lower concentrations by mechanisms which have not been characterized. To investigate the possibility that bile salts promote calcium uptake by red blood cells and that bile salt-associated hemolysis is, in part, calcium-mediated, calcium uptake by red blood cells was measured in the presence of individual bile salts, and hemolysis dependence upon calcium availability was examined. Washed human red blood cells with or without ATP depletion were incubated with 1 mM CaCl2 and tracer amounts of 45CaCl2 in the presence of selected bile salts at concentrations (0.01 to 0.3 mM) reported to be below critical micellar concentrations. Calcium uptake (defined for the purposes of this study as 45Ca retained in red blood cells) was monitored over 5 hr, after which hemolysis and membrane phospholipid content were determined. The presence of bile salts stimulated calcium uptake 4- to 25-fold--the magnitude of which was partly related to the lipid solubility of the bile salts. ATP depletion or exposure to trifluoperazine, procedures which inhibit calcium pump activity in red blood cells, enhanced bile salt-induced calcium uptake relative to controls. The percentage of associated hemolysis (2 to 14%) at the end of 5 hr correlated directly with the observed calcium uptake. Removal of calcium from the extracellular space reduced hemolysis in the presence of bile salts to control levels.(ABSTRACT TRUNCATED AT 250 WORDS)
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