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Yang JZ, Guo XX, Xu C, Hou YY, Yuan W. [Clinicopathological features of gastric alpha-fetoprotein-producing adenocarcinoma with SWI/SNF complex deletion]. Zhonghua Bing Li Xue Za Zhi 2024; 53:52-57. [PMID: 38178747 DOI: 10.3760/cma.j.cn112151-20231023-00284] [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: 01/06/2024]
Abstract
Objective: To investigate the clinicopathological features and treatment of gastric alpha-fetoprotein (AFP)-producing adenocarcinoma with SWI/SNF complex deletion. Methods: Four cases of gastric AFP-producing adenocarcinoma with SWI/SNF complex deletion diagnosed in Zhongshan Hospital of Fudan University from January 2021 to December 2022 were collected, and their histomorphological characteristics, immunohistochemical (IHC), in situ hybridization of Epstein-Barr virus-encoded RNA (EBER), next-generation sequencing results, clinicopathological features and treatment were summarized, and literature review was conducted. Results: Among the 4 patients, there were three males and one female. They presented with abdominal pain, belching and melena. Serum AFP was significantly elevated in three patients, and endoscopy showed ulcerative lesions. Microscopically, the tumor cells showed mainly diffuse flaky or nest-like growth and typical characteristics of hepatoid adenocarcinoma. In two cases there were adenoid growth, and the tumor cells in these areas possessed clear cytoplasm, suggesting enteroblastic differentiation. The tumor cell nuclei were pleomorphic with large nucleoli and brisk mitoses. The IHC results showed that the tumor cells expressed AFP, GPC3 and SALL4, and there was retained expression of broad-spectrum keratin (CKpan) and E-cadherin. IHC detection of SWI/SNF complex subunits, namely INI1 (SMARCB1), BRG1 (SMARCA4), BRM (SMARCA2), ARID1A protein was performed. In all four cases the hepatoid adenocarcinoma region and enteroblastic differentiation region showed SMARCA2 deletion, and one case with enteroblastic differentiation also showed ARID1A deletion. SMARCB1 and SMARCA4 deletions were not seen. All the four cases were diffusely positive for p53 protein, and the Ki-67 proliferation index was 80%-90%. There were no mismatch repair deletion detected; one cases showed HER2 was strongly positive (3+), and EBER was negative. None of the four cases had mutations in the SWI/SNF complex-related subunits detected by next-generation sequencing. Among the four patients, two underwent palliative surgery due to distant metastasis at the time of surgery, two underwent radical resection. Postoperative adjuvant chemotherapy was given to three patients. Conclusions: AFP-producing adenocarcinoma is a rare subtype of gastric cancer, which can be combined with SWI/SNF complex deletion, and the pathomorphological manifestations are different from the classical SWI/SNF complex deletion of undifferentiated carcinoma with rhabdoid phenotype.
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Affiliation(s)
- J Z Yang
- Department of Pathology, Zhongshan Hospital (Xiamen Branch), Fudan University, Xiamen 361015, China
| | - X X Guo
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - C Xu
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Y Y Hou
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - W Yuan
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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He L, Pan XH, Yang JZ, Ma QQ. [Prevalence of syphilis in HIV-infected patients with transmission risk and influencing factors in Zhejiang Province]. Zhonghua Liu Xing Bing Xue Za Zhi 2023; 44:1358-1362. [PMID: 37743266 DOI: 10.3760/cma.j.cn112338-20230130-00046] [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: 09/26/2023]
Abstract
Objective: To investigate the prevalence of syphilis in HIV-infected patients with transmission risk and influencing factors in Zhejiang Province. Method: The information about the HIV-infected patients, who were alive, had been diagnosed with HIV for >1 year, had received no antiviral treatment or had HIV viral load ≥50 copies/ml, and were aged ≥15 years, reported in Zhejiang as of December 31, 2018 were collected from China Information System for Disease Control and Prevention. The information included general demographic characteristics, sexual behavior characteristics and antiretroviral therapy and syphilis serological test results. The prevalence of syphilis and the influencing factors were analyzed by logistic regression model. The SPSS 19.0 software was used for statistical analysis. Results: A total of 2 275 HIV-infected patients were at risk of HIV transmission, and 75.5% (1 717/2 275) of them were tested for syphilis, the prevalence rate of syphilis was 8.7% (150/1 717). Among the HIV-infected patients with syphilis, 11.3% (17/150) received no antiviral treatment, 38.7% (58/150) had viral load of 50-999 copies/ml and 50.0% (75/150) had ≥1 000 copies/ml. Multivariate logistic regression analysis showed that being men (aOR=2.04, 95%CI:1.06-3.96), homosexual transmission (aOR=1.53, 95%CI:1.04-2.27), history of sexually transmitted diseases (STDs) before HIV diagnosis (aOR=1.98, 95%CI:1.35-2.92) and HIV viral load ≥1 000 copies/ml (aOR=1.90, 95%CI:1.09-3.30) were the risk factors for syphilis. Marriage (aOR=0.47, 95%CI: 0.29-0.76) was a protective factor for syphilis. Conclusions: The prevalence of syphilis was high in HIV-infected patients with transmission risk in Zhejiang. It is urgent to carry out classified management and targeted intervention in HIV-infected patients, explore multi-disease prevention and treatment mechanism, strengthen syphilis screening and treatment in HIV-infected patients to reduce the transmission of HIV and syphilis.
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Affiliation(s)
- L He
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - X H Pan
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China Zhejiang Association of STD/AIDS Prevention and Control, Hangzhou 310005, China
| | - J Z Yang
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Q Q Ma
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China Zhejiang Association of STD/AIDS Prevention and Control, Hangzhou 310005, China
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Rong XK, Wang K, Wang T, Yang JZ, Ding JK, Dang JL, Yu Z, Yi CG. [Explorative study of the immobilizing effect of full-thickness skin subcutaneous grafting on allogeneic full-thickness skin graft in rats]. Zhonghua Shao Shang Za Zhi 2021; 37:987-989. [PMID: 34689469 DOI: 10.3760/cma.j.cn501120-20200801-00365] [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 investigate the immobilizing effect of full-thickness skin subcutaneous grafting on allogeneic full-thickness skin graft in rats. Methods: The experimental research method was used. The inbred male Brown-Norway rats (n=10) and Lewis rats (n=10) were used as donors and recipients respectively. After subcutaneously full-thickness separation of a 2.2 cm×2.2 cm area on the nape of the recipient rat, a full-thickness skin of 2.0 cm×2.0 cm taken from the abdomen of the donor rat was subcutaneously grafted, and the donor site was pulled together and sutured. The autologous skin over the allograft in the recipient rat was excised 5-6 d after grafting, and the stitches were removed 7 d after excision. Within 2 months after grafting, the feeding, activity, and survival of the donor and recipient rats, behavior of tearing and scratching the wounds of the recipient rats, the wound condition after autologous skin excision in recipient rats, and the survival and hair growth of the grafted allogeneic skin were observed. Results: Within 2 months after grafting, the donor and recipient rats all ate normally and could move freely with no abnormal death. No tearing or scratching of the wounds occurred in recipient rats. There was a small amount of exudation and partial epidermal desquamation after autologous skin excision in recipient rats. All transplanted allografts survived, which were free of infection and necrosis, with new hairs growing out smoothly. Conclusions: The immobilizing method of full-thickness skin subcutaneous grafting of allogeneic full-thickness skin graft in rats is simple and time-saving without postoperative dressing change, with reliable pressure fixation and high survival rate of skin grafts, which can be promoted for animal skin grafting models.
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Affiliation(s)
- X K Rong
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - K Wang
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - T Wang
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - J Z Yang
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - J K Ding
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - J L Dang
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - Z Yu
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - C G Yi
- Department of Plastic and Reconstructive Surgery, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
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Jiang J, Yang JZ, Xu Y, Luo MY, Chen L, Pan XH. [Epidemiological characteristic of newly reported HIV/AIDS cases with non-martial and non-commercial heterosexual behaviors in Zhejiang province, 2017-2019]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:1601-1606. [PMID: 34814590 DOI: 10.3760/cma.j.cn112338-20210303-00167] [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: 06/13/2023]
Abstract
Objective: To understand the epidemiological characteristics and transmission routes of newly reported HIV/AIDS cases with non-martial and non-commercial (NMNC) heterosexual behaviors in Zhejiang province. Methods: A retrospective survey was conducted among HIV/AIDS cases that had NMNC heterosexual behavior history and diagnosed with HIV infection in Zhejiang between January 1st, 2017 and September 30th, 2019. The multiple correspondence analysis (MCA) was used to explore the association of social demographic characteristics with NMNC heterosexual partner types in the cases. Results: A total of 406 participants with NMNC heterosexual behaviors before HIV diagnoses were recruited in this study. Most of them were males (67.2%, 273/406), aged 25-49 years at HIV diagnoses (59.1%, 240/406). Prior to HIV infection confirmation, 36.0% (146/406) participants only had casual sexual partners, 52.0% (211/406) only had regular sexual partners, and 12.0% (49/406) had both. Statistical differences in marital status, occupation and income level were found among participants with different types of NMNC heterosexual partners (all P<0.05). Result of MCA indicted that monthly income ≤3 000 yuan RMB, self-employed, being married were only associated with casual NMNC heterosexual partner; working in service industry, education level of junior high school were only associated with regular heterosexual partner; working in enterprise, high school education level or above, monthly income ≥5 000 yuan RMB were associated with both casual and regular sexual partner. Conclusion: The HIV/AIDS cases with NMNC heterosexual behaviors before HIV diagnoses accounted for a large proportion in Zhejiang province during 2017-2019. Active intervention efforts should be made to improve the health awareness of the public to reduce the risk behaviors for HIV transmission.
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Affiliation(s)
- J Jiang
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - J Z Yang
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Y Xu
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - M Y Luo
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - L Chen
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - X H Pan
- Institute of AIDS/STD Prevention and Control, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
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Yang JZ, Chen WJ, Zhang WJ, He L, Zhang JF, Pan XH. [Molecular epidemiology and transmission of HIV-1 infection in Zhejiang province, 2015]. Zhonghua Liu Xing Bing Xue Za Zhi 2018; 38:1551-1556. [PMID: 29141348 DOI: 10.3760/cma.j.issn.0254-6450.2017.11.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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 understand the distribution of HIV-1 subtype diversity and its transmission characteristics in Zhejiang province. Methods: A total of 302 newly diagnosed HIV-1 positive patients were selected through stratified random sampling in Zhejiang in 2015. HIV-1 pol genes were sequenced successfully with reverse transcription PCR/nested PCR and phylogenetic analysis was conducted for 276 patients. Then a molecular epidemiologic study was performed combined with field epidemiological investigation. Results: Of 276 sequence samples analyzed, 122 CRF07_BC strains (44.2%), 103 CRF01_AE strains (37.3%), 17 CRF08_BC strains (6.1%), 9 B strains (3.2%), 6 CRF55_01B strains (2.2%), 5 C strains (1.8%), 1 CRF59_01B strain (0.4%), 1 CRF67_01B strain (0.4%), 1 A1 strain (0.4%), and 11 URFs strains (4.0%) were identified. Phylogenetic analysis revealed 16 clusters with only 15.1% (34/225) sequences involved among CRF07_BC and CRF01_AE strains. The clustered cases in MSM were higher than that in populations with other transmission routes. And clusters existed between the populations with different transmission routes. Conclusion: The major strains of HIV-1 in Zhejiang are CRF07_BC and CRF01_AE. The HIV subtypes showed more complexity in Zhejiang. It is necessary to strengthen the surveillance for HIV subtypes, carry out classified management and conduct effective prevention and control in the population at high risk.
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Affiliation(s)
- J Z Yang
- Department of AIDS/STD Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhuo 310051, China
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Zhang JF, Yao JM, Fan Q, Chen WJ, Pan XH, Ding XB, Yang JZ, Fu T. [Analysis on HIV-1 subtypes and transmission clusters in newly reported HIV/AIDS cases in Yiwu, Zhejiang Province, 2016]. Zhonghua Liu Xing Bing Xue Za Zhi 2018; 38:1688-1693. [PMID: 29294588 DOI: 10.3760/cma.j.issn.0254-6450.2017.12.021] [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 understand the characteristics of distribution on HIV-1 subtypes and the transmission clusters in Yiwu in Zhejiang province. Methods: A cross-sectional study of molecular epidemiology was carried out on newly reported HIV/AIDS cases in Yiwu. RNA was extracted from 168 plasma samples, followed by RT-PCR and nest-PCR for pol gene amplification, sequencing, phylogenetic tree construction used for analyzing the subtypes and transmission clusters. Mutations on drug resistance was analyzed by CPR 6.0 online tool. Results: Subjects were mainly males (86.3%, 145/168), with average age as (39.1±13.4) years old and most of them were migrants (66.7%, 112/168). The major routes of transmission included homosexual (51.2%, 86/168) and heterosexual (48.8%, 82/168) contacts. The rate of success for sequence acquisition was 89.9% (151/168). The dominant subtypes showed as CRF01_AE (74, 49.0%) and CRF07_BC (64, 42.4%), followed by CRF08_BC (5, 3.3%), CRF55_01B (3, 2.0%), each case of subtype B, CRF45_cpx, CRF59_01B, CRF85_BC and URF (B/C). CRF45_cpx and CRF85_BC were discovered the first time in Zhejiang province. Twenty-six transmission clusters involving 65 cases were found, with the total clustered rate as 43.0% (65/151), in which the CRF01_AE clustered rate appeared as 54.1% (40/74), higher than that of CRF07_BC (21/64, 32.8%). The average size of cluster was 2.5 cases/cluster, with average size of cluster in CRF01_AE patients infected through heterosexual transmission as the largest (3.5 cases/cluster). The prevalence of transmitted drug resistance was 4.6% (7/151). Seven cases with surveillance drug resistant mutations (SDRM) were found, including 5 cases of M46L (3.3%), and one case of F77L or Y181C. Conclusion: HIV genetic diversity and a variety of transmission clusters had been noticed in this study area (Yiwu). Programs on monitoring the subtypes and transmission clusters should be continued and strengthened.
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Affiliation(s)
- J F Zhang
- Department of HIV/AIDS and STD Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - J M Yao
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, China
| | - Q Fan
- Department of HIV/AIDS and STD Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - W J Chen
- Department of HIV/AIDS and STD Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - X H Pan
- Department of HIV/AIDS and STD Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - X B Ding
- Department of HIV/AIDS and STD Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - J Z Yang
- Department of HIV/AIDS and STD Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - T Fu
- Yiwu Municipal Center for Disease Control and Prevention, Yiwu 322000, China
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Zheng JL, Xu Y, He L, Jiang J, Zhang JF, Zhang WJ, Ding XB, Yang JZ. [Analysis on antiretroviral therapy efficacy for HIV/AIDS in Zhejiang province, 2009-2014]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 37:673-7. [PMID: 27188360 DOI: 10.3760/cma.j.issn.0254-6450.2016.05.017] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To analyze the efficacy of highly active antiretroviral therapy(HAART)for HIV/AIDS in Zhejiang province from 2009 to 2014. METHODS A retrospective cohort study was conducted among patients with access to HAART aged <15 years from 2009 to 2014 through descriptive epidemiological analysis on the patients' demographic characteristics, HAART efficacy. The immune recovery Kaplan-Meier curves were drawn by using baseline CD(4) T lymphocytes cell(CD(4))data. The influencing factors for virus suppression were analyzed by using logistic regression model. RESULTS There were 9 594 patients with access to HAART in Zhejiang from 2009 to 2014. The' average age of the patients was 38.7 years old, the male to female ratio was 4.11∶1. Heterosexual(55.9%)and homosexual(40.0%)contacts were the main transmission routes. Baseline CD(4) count 200-349 cells/μl was found in 45.4% of the patients, the median of the CD(4) count was 221(IQR: 123-298). The median of time for CD(4) recovery in patients with baseline CD(4) count <200 cells/μl was 3.48 and 11.58 times higher than the patients with baseline CD(4) count 200-349 cells/μl and baseline CD(4) count ≥350 cells/μl. Univariate and multivariate logistic regression analyses showed that marital status, HAART regimen, treatment miss in last week and CD(4) recovery were major influencing factors for HAART efficacy. CONCLUSIONS HAART had good treatment effecacy in HIV/AIDS patients in Zhejiang. The baseline CD(4) count and adherence to HAART were the most important influencing factors. It is recommended to take measures to expand HIV screening and HAART coverage, conduct HAART adherence education, and strengthen the special care for high-risk groups to improve the HAART efficacy in Zhejiang province.
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Affiliation(s)
- J L Zheng
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
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Zeng YW, Du J, Yang XM, Pu XY, Wang LX, Yang JZ, Du LJ, Yang T, Yang SM, Sun ZH. Identification of quantitative trait loci for mineral elements in grains and grass powder of barley. Genet Mol Res 2016; 15:gmr-15-04-gmr.15049103. [PMID: 27966755 DOI: 10.4238/gmr15049103] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mineral elements in barley (Hordeum vulgare) play an important physiological role in global human health. In this study, quantitative trait loci (QTLs) for concentration of nine mineral elements in barley grain and grass powder were detected in a population of 193 recombinant inbred lines of the barley cross Ziguangmangluoerling x Schooner and the parents. We observed large genetic variation contributing to element concentrations in both grains and grass powder. The mean K, Ca, and Fe concentrations in grass powder were 6.67, 12.00, and 4.58 times that of regenerating barley grains. In grains, 17 QTLs that accounted for 6.36-64.08% of the phenotypic variation in Zn, Mg, Ca, K, Na, Mn, Fe, and P concentrations were identified. In grass powder, seven QTLs were identified; these accounted for 6.03-21.86% of the variation in Ca, Zn, Mg, K, Fe, and Cu concentrations. These QTLs affecting elements in grain and grass powder are so far unreported in barley. To our knowledge, QTLs with pleiotropic effects for three elements were also identified for the first time in barley. The qK1/qMg1/qCa1 region between markers Bmag0211 and GBMS0014 on chromosome 1H was shown to have large additive effects for Mg, Ca, and K concentrations in grains. These additive effects indicated that the high element (Mg, Ca, Zn, Mn, and K) alleles were contributed by Ziguangmangluoerling. These results will further our understanding of the genetic basis of mineral elements and help us develop markers linked with mineral elements for marker-assisted selection breeding in barley.
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Affiliation(s)
- Y W Zeng
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - J Du
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - X M Yang
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - X Y Pu
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - L X Wang
- Institute of Quality Standards and Testing Technology, Yunnan Academy of Agricultural Sciences, Yunnan Province, China
| | - J Z Yang
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - L J Du
- Institute of Quality Standards and Testing Technology, Yunnan Academy of Agricultural Sciences, Yunnan Province, China
| | - T Yang
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - S M Yang
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - Z H Sun
- Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China.,Science and Technology Department, Southwest Forestry University, Yunnan Province, China
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Zeng YW, Sun D, Du J, Pu XY, Yang SM, Yang XM, Yang T, Yang JZ. Identification of QTLs for resistant starch and total alkaloid content in brown and polished rice. Genet Mol Res 2016; 15:gmr7268. [PMID: 27525873 DOI: 10.4238/gmr.15037268] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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
An F3 population consisting of 117 F2:3 families derived from a cross between two varieties of rice, Gongmi No. 3 and Diantun 502, with a large difference in their resistant starch and total alkaloid content, was used for quantitative trait locus (QTL) mapping. Two QTLs of resistant starch for rice (qRS7-1, qRS7-2) were identified in a linkage group on chromosome 7, which could explain phenotypic variance from 7.6 to 17.3%, due to additive effects for resistant starch from Gongmi No. 3 or over-dominance effects for qRS7-2 of the marker interval (RM3404-RM478) on chromosome 7 from Gongmi No. 3, accounting for 13.8-17.3% of the phenotypic variance. Two QTLs of total alkaloids for brown rice (qALb7-1, qALb7-2) were identified in the same linkage group, which could explain phenotypic variance from 7.7 and 19.3%, respectively, due to dominance or over-dominance effects for total alkaloids on chromosome 7 from Diantun 502. To our knowledge, these are the first QTLs to be identified, which are related to resistant starch and total alkaloid content in rice. These results are beneficial for understanding the genetic basis of, as well as for developing markers linked with, resistant starch and total alkaloids of functional components for marker-assisted selection breeding in rice.
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Affiliation(s)
- Y W Zeng
- Agricultural Biotechnology Key Laboratory of Yunnan Province/Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - D Sun
- School of Life Sciences, Yunnan University, Kunming, Yunnan Province, China
| | - J Du
- Agricultural Biotechnology Key Laboratory of Yunnan Province/Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - X Y Pu
- Agricultural Biotechnology Key Laboratory of Yunnan Province/Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - S M Yang
- Agricultural Biotechnology Key Laboratory of Yunnan Province/Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - X M Yang
- Agricultural Biotechnology Key Laboratory of Yunnan Province/Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - T Yang
- Agricultural Biotechnology Key Laboratory of Yunnan Province/Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan Province, China
| | - J Z Yang
- Key Laboratory of Southwestern Crop Gene Resources and Germplasm Innovation of Ministry of Agriculture/Kunming Tiankang Science & Technology Limited Company, Kunming, Yunnan Province, China
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Du W, Zhang Y, Yang JZ, Li HB, Xia J, Li N, Zhang JS, Yan XM, Zhou ZY. Effect of MSTN propeptide protein on the growth and development of Altay lamb muscle. Genet Mol Res 2016; 15:gmr7778. [PMID: 27420960 DOI: 10.4238/gmr.15027778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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
Prokaryotic expression technology was used to express maltose-binding protein binding myostatin (MSTN) propeptide fusion protein. Six disease-free Altay lambs were used in this study. The right leg gastrocnemii were injected with MSTN recombinant propeptide protein. The left leg gastrocnemii (the control group) were injected with the same dose of phosphate based saline. The lambs were fed during four months under the same conditions and then slaughtered. Gastrocnemius samples were hematoxylin-eosin stained and the size of the muscle fibers was measured. A real-time polymerase chain reaction (RT-PCR) showed that single gastrocnemius cells in the experimental group had an average area of 1163.01 µm(2), while it was 845.09 µm(2) in the control group (P < 0.05). This indicates that the MSTN propeptide biological agents had an inhibitory effect on MSTN. In order to reveal its mechanism, RT-PCR was conducted to detect the expression of the differentiation-associated genes MyoD, Myf5, Myogenin, p21, and Smad3. The results showed that, in the MSTN propeptide biological agent injected group, expression levels of MSTN, Smad3, and p21 were lower than the control group, while Myf5, MyoD, and Myogenin were higher compared to the control group. This indicates that, when expression of the MSTN gene was inhibited, muscle cell differentiation and growth can be promoted by Smad3 up-regulated expression of Myf5, MyoD, and Myogenin.
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Affiliation(s)
- W Du
- Xinjiang Academy of Animal Science, Urumqi, China
| | - Y Zhang
- Xinjiang Academy of Animal Science, Urumqi, China
| | - J Z Yang
- Agriculture Lab, University of Hawaii at Manoa, Honolulu, HI, USA
| | - H B Li
- Xinjiang Academy of Animal Science, Urumqi, China
| | - J Xia
- Xinjiang Academy of Animal Science, Urumqi, China
| | - N Li
- Xinjiang Academy of Animal Science, Urumqi, China
| | - J S Zhang
- Xinjiang Academy of Animal Science, Urumqi, China
| | - X M Yan
- Xinjiang Academy of Animal Science, Urumqi, China
| | - Z Y Zhou
- Xinjiang Academy of Animal Science, Urumqi, China
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11
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Yan WX, Jia XJ, Chen YB, Zhao ZX, Liu XL, Yang JZ, Wang TJ. Primary small cell carcinoma of the vagina with pulmonary metastasis: a case report. EUR J GYNAECOL ONCOL 2016; 37:129-132. [PMID: 27048125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Primary small cell carcinoma of the vagina is extremely rare; no standard treatment has been established despite it being highly aggressive. Here, the authors report on a 43-year-old patient who had a mass on the clitoris and no uterine or bilateral adnexal involvement. Vaginal wall biopsy revealed malignant small cell carcinoma. The carcinoma was composed of epithelial cells with round, hyperchromatic nuclei containing few distinct nucleoli, and scanty cytoplasm. Chest computerized axial tomography and pathological bronchoscopy revealed bilateral pulmonary metastases. She received radiotherapy combined with six cycles of chemotherapy (paclitaxel plus cisplatin), and achieved complete response, with complete suppression of the mass and lung metastases. There was no sign of tumor recurrence or distant metastases after 21 months of follow-up.
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12
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Yang JZ, Jiang H, Wang WJ, Zhang YM, Liu Y, Chen YG. Isolation and Characterization of Batatasin III and 3,4’- Dihydroxy-5-methoxybibenzyl: A Pair of Positional Isomers from Sunipia scariosa. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i4.7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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13
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Zhu JJ, Liu XF, Zhang PL, Yang JZ, Wang J, Qin Y, Zhang GL, Ren DQ, Cui CL, Guo XG. Anatomical information for intercostobrachial nerve preservation in axillary lymph node dissection for breast cancer. Genet Mol Res 2014; 13:9315-23. [PMID: 24615083 DOI: 10.4238/2014.january.24.13] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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
This study aimed to provide additional anatomical information for axillary lymph node dissection (ALND) through in vivo anatomy studies of intercostobrachial nerve (ICBN) preservation in order to provide theoretical and practical experience for clinicians. A total of 156 patients with breast cancer underwent ALND at the Department of Gynecology of Baotou Tumor Hospital between June 2009 and March 2010. The origin, destination, main source, length, branch type, and direction of ICBN in axilla were observed, as well as its relationship with adjacent major blood vessels and nerves within the axilla. There were 120 cases of single trunk, 23 cases of double trunks, 9 cases of multiple trunks, and 4 cases without trunks in 156 patients with ICBN preservation. The transverse diameter at the origin of the ICBN was 1.89 ± 0.44 mm with a length of 94.45 ± 12.08 mm; the distances were 77.19 ± 21.04 mm, 29.34 ± 6.73 mm, 90.04 ± 13.13 mm, and 28.63 ± 13.01 mm from origin to the inferior margin at the midpoint of the clavicle, inferior margin of the axillary vein, the bottom of axilla, and branch point, respectively. The identification, dissection, and preservation of ICBN was simple and easy in a modified radical mastectomy for breast cancer and breast-conserving surgery, which only took 10-20 min, but effectively reduced the incidence of post-mastectomy pain syndrome and significantly improved the quality of life for patients after surgery.
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Affiliation(s)
- J J Zhu
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - X F Liu
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - P L Zhang
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - J Z Yang
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - J Wang
- Department of Anti-Cancer Association, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - Y Qin
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - G L Zhang
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - D Q Ren
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
| | - C L Cui
- Department of Anatomy (Teaching and Research), Baotou Medical College, Science and Technology University of Baotou, Baotou City, Inner Mongolia, China
| | - X G Guo
- Department of Surgical Oncology, Cancer Hospital of Baotou City, Baotou City, Inner Mongolia, China
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14
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Xing L, Devadas B, Devraj RV, Selness SR, Shieh H, Walker JK, Mao M, Messing D, Samas B, Yang JZ, Anderson GD, Webb EG, Monahan JB. Discovery and characterization of atropisomer PH-797804, a p38 MAP kinase inhibitor, as a clinical drug candidate. ChemMedChem 2011; 7:273-80. [PMID: 22174080 DOI: 10.1002/cmdc.201100439] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 11/18/2011] [Indexed: 01/18/2023]
Abstract
PH-797804 ((aS)-3-{3-bromo-4-[(2,4-difluorobenzyl)oxy]-6-methyl-2-oxopyridin-1(2H)-yl}-N,4-dimethylbenzamde) is a diarylpyridinone inhibitor of p38 mitogen-activated protein (MAP) kinase derived from a racemic mixture as the more potent atropisomer (aS), first proposed by molecular modeling and subsequently confirmed by experiments. Due to steric constraints imposed by the pyridinone carbonyl group and the 6- and 6'-methyl substituents of PH-797804, rotation around the connecting bond of the pyridinone and the N-phenyl ring is restricted. Density functional theory predicts a remarkably high rotational energy barrier of >30 kcal mol(-1), corresponding to a half-life of more than one hundred years at room temperature. This gives rise to discrete conformational spaces for the N-phenylpyridinone group, and as a result, two atropic isomers that do not interconvert under ambient conditions. Molecular modeling studies predict that the two isomers should differ in their binding affinity for p38α kinase; whereas the atropic S (aS) isomer binds favorably, the opposite aR isomer incurs significant steric interference with p38α kinase. The two isomers were subsequently identified and separated by chiral chromatography. IC50 values from p38α kinase assays confirm that one atropisomer is >100-fold more potent than the other. It was ultimately confirmed by small-molecule X-ray diffraction that the more potent atropisomer, PH-797804, is the aS isomer of the racemic pair. Extensive pharmacological characterization supports that PH-797804 carries most activity both in vitro and in vivo, and it has a stability profile compatible with oral formulation and delivery options.
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Affiliation(s)
- Li Xing
- Inflammation/Immunology Chemistry, Pfizer Worldwide Research and Development, 200 CambridgePark Drive, Cambridge, MA 02421, USA.
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15
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Carron CP, Trujillo JI, Olson KL, Huang W, Hamper BC, Dice T, Neal BE, Pelc MJ, Day JE, Rohrer DC, Kiefer JR, Moon JB, Schweitzer BA, Blake TD, Turner SR, Woerndle R, Case BL, Bono CP, Dilworth VM, Funckes-Shippy CL, Hood BL, Jerome GM, Kornmeier CM, Radabaugh MR, Williams ML, Davies MS, Wegner CD, Welsch DJ, Abraham WM, Warren CJ, Dowty ME, Hua F, Zutshi A, Yang JZ, Thorarensen A. Discovery of an Oral Potent Selective Inhibitor of Hematopoietic Prostaglandin D Synthase (HPGDS). ACS Med Chem Lett 2010; 1:59-63. [PMID: 24900177 DOI: 10.1021/ml900025z] [Citation(s) in RCA: 19] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 01/22/2010] [Indexed: 11/29/2022] Open
Abstract
Hematopoietic prostaglandin D synthase (HPGDS) is primarly expressed in mast cells, antigen-presenting cells, and Th-2 cells. HPGDS converts PGH2 into PGD2, a mediator thought to play a pivotal role in airway allergy and inflammatory processes. In this letter, we report the discovery of an orally potent and selective inhibitor of HPGDS that reduces the antigen-induced response in allergic sheep.
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Affiliation(s)
- Chris P. Carron
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - John I. Trujillo
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Kirk L. Olson
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Wei Huang
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Bruce C. Hamper
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Tom Dice
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Bradley E. Neal
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Matthew J. Pelc
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Jacqueline E. Day
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Douglas C. Rohrer
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - James R. Kiefer
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Joseph B. Moon
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Barbara A. Schweitzer
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Tanisha D. Blake
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Steve R. Turner
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Rhonda Woerndle
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Brenda L. Case
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Christine P. Bono
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Vickie M. Dilworth
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | | | - Becky L. Hood
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Gina M. Jerome
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Christine M. Kornmeier
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Melissa R. Radabaugh
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Melanie L. Williams
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Michael S. Davies
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Craig D. Wegner
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Dean J. Welsch
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - William M. Abraham
- Department of Research, Mount Sinai Medical Center, 4300 Alton Road, Miami Beach, Florida 33140
| | - Chad J. Warren
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Martin E. Dowty
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Fengmei Hua
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Anup Zutshi
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Jerry Z. Yang
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
| | - Atli Thorarensen
- Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017
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16
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Morris DL, O’Neil SP, Devraj RV, Portanova JP, Gilles RW, Gross CJ, Curtiss SW, Komocsar WJ, Garner DS, Happa FA, Kraus LJ, Nikula KJ, Monahan JB, Selness SR, Galluppi GR, Shevlin KM, Kramer JA, Walker JK, Messing DM, Anderson DR, Mourey RJ, Whiteley LO, Daniels JS, Yang JZ, Rowlands PC, Alden CL, Davis JW, Sagartz JE. Acute Lymphoid and Gastrointestinal Toxicity Induced by Selective p38α Map Kinase and Map Kinase–Activated Protein Kinase-2 (MK2) Inhibitors in the Dog. Toxicol Pathol 2010; 38:606-18. [DOI: 10.1177/0192623310367807] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Exposure to moderately selective p38α mitogen-activated protein kinase (MAPK) inhibitors in the Beagle dog results in an acute toxicity consisting of mild clinical signs (decreased activity, diarrhea, and fever), lymphoid necrosis and depletion in the gut-associated lymphoid tissue (GALT), mesenteric lymph nodes and spleen, and linear colonic and cecal mucosal hemorrhages. Lymphocyte apoptosis and necrosis in the GALT is the earliest and most prominent histopathologic change observed, followed temporally by neutrophilic infiltration and acute inflammation of the lymph nodes and spleen and multifocal mucosal epithelial necrosis and linear hemorrhages in the colon and cecum. These effects are not observed in the mouse, rat, or cynomolgus monkey. To further characterize the acute toxicity in the dog, a series of in vivo, in vitro, and immunohistochemical studies were conducted to determine the relationship between the lymphoid and gastrointestinal (GI) toxicity and p38 MAPK inhibition. Results of these studies demonstrate a direct correlation between p38α MAPK inhibition and the acute lymphoid and gastrointestinal toxicity in the dog. Similar effects were observed following exposure to inhibitors of MAPK-activated protein kinase-2 (MK2), further implicating the role of p38α MAPK signaling pathway inhibition in these effects. Based on these findings, the authors conclude that p38α MAPK inhibition results in acute lymphoid and GI toxicity in the dog and is unique among the species evaluated in these studies.
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Affiliation(s)
- Dale L. Morris
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Shawn P. O’Neil
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Rajesh V. Devraj
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Joseph P. Portanova
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Richard W. Gilles
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Cindy J. Gross
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Sandra W. Curtiss
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - Debra S. Garner
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Fernando A. Happa
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Lori J. Kraus
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - Joseph B. Monahan
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Shaun R. Selness
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - Kimberly M. Shevlin
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - John K. Walker
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Dean M. Messing
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - David R. Anderson
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Robert J. Mourey
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Laurence O. Whiteley
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - John S. Daniels
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Jerry Z. Yang
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Philip C. Rowlands
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Carl L. Alden
- Millennium Pharmaceuticals Inc., Cambridge, Massachusetts, USA
| | - John W. Davis
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
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17
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Yang JZ, Young AL, Chiang PC, Thurston A, Pretzer DK. Fluticasone and budesonide nanosuspensions for pulmonary delivery: Preparation, characterization, and pharmacokinetic studies. J Pharm Sci 2008; 97:4869-78. [DOI: 10.1002/jps.21380] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Zhou LL, Sun DP, Hu LY, Li YW, Yang JZ. Effect of addition of sodium alginate on bacterial cellulose production by Acetobacter xylinum. J Ind Microbiol Biotechnol 2007; 34:483-9. [PMID: 17440758 DOI: 10.1007/s10295-007-0218-4] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [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: 03/29/2006] [Accepted: 03/06/2007] [Indexed: 11/24/2022]
Abstract
Bacterial cellulose (BC) production by Acetobacter xylinum NUST4.1 was carried out in the shake flask and in a stirred-tank reactor by means of adding sodium alginate (NaAlg) into the medium. When 0.04% (w/v) NaAlg was added in the shake flask, BC production reached 6.0 g/l and the terminal yield of the cellulose was 27% of the total sugar initially added, compared with 3.7 g/l and 24% in the control, respectively. The variation between replicates in all determinations was less than 5%. During the cultivation in the stirred-tank reactor, the addition of NaAlg changed the morphology of cellulose from the irregular clumps and fibrous masses entangled in the internals to discrete masses dispersing into the broth, which indicates that NaAlg hinders formation of large clumps of BC, and enhances cellulose yield. Because the structure of cellulose is changed depending on the culture condition such as additives, structural characteristics of BC produced in the NaAlg-free and NaAlg medium are compared using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD). SEM photographs show some differences in reticulated structures and ribbon width and FT-IR spectra indicate that there is the hydrogen bonding interaction between BC and NaAlg, then X-ray diffraction (XRD) analysis reveals that BC produced with NaAlg-added has a lower crystallinity and a smaller crystalline size. The results show that enhanced yields and modification of cellulose structure occur in the presence of NaAlg.
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Affiliation(s)
- L L Zhou
- Bioengineering Department, Institute of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
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Tang F, Ouyang H, Yang JZ, Borchardt RT. Bidirectional transport of rhodamine 123 and Hoechst 33342, fluorescence probes of the binding sites on P-glycoprotein, across MDCK–MDR1 cell monolayers. J Pharm Sci 2004; 93:1185-94. [PMID: 15067695 DOI: 10.1002/jps.20046] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [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: 11/08/2022]
Abstract
The bidirectional permeation characteristics of rhodamine 123 and Hoechst 33342, fluorescence probes of the binding sites on P-glycoprotein (P-gp), across monolayers of MDCK cells transfected with the human MDR1 gene (MDCK-MDR1) were investigated. The ratios of the apparent permeability coefficients (P(app)) of rhodamine 123 and Hoechst 33342 flux measured in the basolateral (BL) to apical (AP) direction versus the flux in the AP-to-BL direction (P(app BL-to-AP)/P(app AP-to-BL)) were 115 and 177, respectively. The P-gp inhibitor GF-120918 could significantly reduce the polarized efflux of both rhodamine 123 and Hoechst 33342. Rhodamine 123 appeared to "stimulate" the polarized efflux of Hoechst 33342 across MDCK-MDR1 cell monolayers. In contrast, Hoechst 33342 partially inhibited the polarized efflux of rhodamine 123 across these cell monolayers whereas daunorubicin partially inhibited the polarized efflux of both rhodamine 123 and Hoechst 33342. The uptake characteristics of rhodamine 123 and Hoechst 33342 in MDCK-MDR1 cells were measured in the absence and presence of GF-120918 and known P-gp substrates (Hoechst 33342, rhodamine 123, and daunorubicin). The uptake of rhodamine 123 and Hoechst 33342 in MDCK-MDR1 cells was enhanced more than twofold by inclusion of GF-120918 (2 microM) in the incubation medium. Daunorubicin (160 microM) increased the relative fluorescence unit (RFU) values of cytoplasm-associated rhodamine 123 by up to 30%. However, daunorubicin (40 microM) and rhodamine 123 (5 microM) decreased the RFU values of cell membrane-associated Hoechst 33342 by 70% and 40%, respectively. To further explore what appears to be a "stimulatory" effect of daunorubicin and rhodamine 123 on the uptake of Hoechst 33342 and a stimulatory effect of daunorubicin on Hoechst 33342 transport across cell monolayer, uptake of Hoechst 33342 into liposomes in the presence and absence of GF-120918, daunorubicin, and rhodamine 123 was determined. GF-120918 exhibited no effect on the RFU values of liposome-associated Hoechst 33342. In contrast, rhodamine 123 and daunorubicin decreased the fluorescence of liposome-associated Hoechst 33342 suggesting these molecules were either quenching the fluorescence of this chemical probe or displacing it from the lipid bilayer. In conclusion, these bidirectional transport data indicate that rhodamine 123 and Hoechst 33342 are excellent substrates of P-gp in MDCK-MDR1 cells. The ability of Hoechst 33342 to partially inhibit the polarized efflux of rhodamine 123 is consistent with these substrates binding to the same site on P-gp. In contrast, the ability of rhodamine 123 to apparently "stimulate" the efflux of Hoechst 33342 in both the transport and uptake experiments suggests the substrates might bind to different sites on P-gp. However, experimental results using liposomes suggested that this "stimulation" phenomenon by rhodamine 123 on Hoechst 33342 uptake and efflux might simply be an artifact. Thus, the use of Hoechst 33342 to probe the binding sites on a membrane-bound protein such as P-gp might be problematic.
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Affiliation(s)
- Fuxing Tang
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047, USA.
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20
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Chen J, Si CW, Wang QH, Liu Y, Zhong YW, Yang JZ, Hong WG. [Cloning and sequence analysis of a gene encoding amastin from Leishmania major]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 18:30-2. [PMID: 12567469] [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: 02/28/2023]
Abstract
OBJECTIVE To clone a gene encoding surface protein from Leishmania major. METHODS Using T. cruzi amastin DNA sequence as a reference, computer search was done on GenBank and dbEST databases by using BLAST path. A Leishmania major DNA library has been constructed and screened by in situ colony hybridization. RESULTS A 309nt DNA fragment from Leishmania major was found in dbEST. Leishmania major DNA library was screened using specific primers synthesized according to 309 nt DNA sequence, and a full-length coding sequence for Leishmania major amastin was cloned. The coding sequence consisted of 552 nt, and translated into 183 amino acid residues. The homology is 23.5% at amino acid sequence level between Leishmania major and T. cruzi amastins. CONCLUSION A full length amastin coding gene for Leishmania major has been cloned.
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Affiliation(s)
- J Chen
- Gene Therapy Research Center, Institute of Infectious Diseases, 302 Hospital of PLA, Beijing 100039
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21
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Yang JZ, Si TM, Ruan Y, Ling YS, Han YH, Wang XL, Zhou M, Zhang HY, Kong QM, Liu C, Zhang DR, Yu YQ, Liu SZ, Ju GZ, Shu L, Ma DL, Zhang D. Association study of neuregulin 1 gene with schizophrenia. Mol Psychiatry 2003; 8:706-9. [PMID: 12874607 DOI: 10.1038/sj.mp.4001377] [Citation(s) in RCA: 188] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A number of studies have indicated that 8p22-p12 is likely to harbor schizophrenia susceptibility loci. In this region, the candidate gene of interest, neuregulin 1 (NRG1), may play a role in the pathogenesis of schizophrenia. Then in the present study, we performed the linkage disequilibrium to determine the association between three genetic variants (SNPs: rs3924999, rs2954041, SNP8NRG221533) on NRG1 gene and schizophrenia in 246 Chinese Han schizophrenic family trios using PCR-based restriction fragment length polymorphism method and denaturing high-performance liquid chromatography. The transmission disequilibrium test analysis for each variant showed a significant difference between two transmitted alleles even after Bonferroni correction (rs3924999, P=0.007752; rs2954041, P=0.0009309; SNP8NRG221533, P=0.012606). The global chi(2) test for haplotype transmission also revealed a strong association (chi(2)=46.068, df=7, P&<0.000001). Our results suggest that the NRG1 gene may play a role in conferring susceptibility to the disease.
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Affiliation(s)
- J Z Yang
- Institute of Mental Health, Peking University, Beijing 100083, China
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Yang JZ, Bastian KC, Moore RD, Stobaugh JF, Borchardt RT. Quantitative analysis of a model opioid peptide and its cyclic prodrugs in rat plasma using high-performance liquid chromatography with fluorescence and tandem mass spectrometric detection. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 780:269-81. [PMID: 12401352 DOI: 10.1016/s1570-0232(02)00536-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [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: 10/27/2022]
Abstract
Two analytical methods were developed for quantitative determination of DADLE (H(2)N-Tyr-D-Ala-Gly-Phe-D-Leu-COOH) and its two cyclic prodrugs in rat plasma. For high-performance liquid chromatography with fluorescence detection (LC-FLU), precolumn derivatization of DADLE was accomplished by labeling the N-terminal amino group with the reagent naphthalene-2,3-dicarboxaldehyde in the presence of cyanide (NDA/CN) to form a highly fluorescent 1-cyanobenz[f]isoindole (CBI) derivative. A multi-dimensional LC system was employed to improve selectivity, and solid-phase extraction (SPE) was used for plasma sample preparation. The cyclic prodrugs were converted to DADLE prior to their derivatization. With fluorescence detection after derivatization, the limit of quantitation (LOQ) was 6 ng ml(-1) for the analysis of DADLE, and good linearity was observed up to 6000 ng ml(-1) in rat plasma. Quantitative analysis of DADLE and its cyclic prodrugs was also performed using liquid chromatography interfaced to electrospray ionization tandem mass spectrometry (LC-ESI-MS-MS). Chromatographic separation was achieved on a C(18) column using gradient elution in a water-acetonitrile system containing 0.1% (v/v) formic acid. The tandem mass spectrometric analysis was performed in the multiple reaction monitoring mode using internal standardization to improve assay precision and accuracy. For plasma sample pretreatment, acetonitrile was added first to precipitate proteins and SPE was used to minimize matrix effects. Using LC-ESI-MS-MS, the LOQ was 0.5 ng ml(-1) for DADLE and 2 to 5 ng ml(-1) for its prodrugs. Good linearity was observed from the LOQ up to 1000 ng ml(-1) for all compounds. For the analysis of DADLE, both analytical methods showed good precision, accuracy and stability. However, for prodrug analysis, LC-FLU showed some sensitivity and accuracy problems, while the LC-ESI-MS-MS method provided consistent and satisfactory results. In conclusion, LC-ESI-MS-MS is the method of choice for the analysis of DADLE and its cyclic prodrugs in rat plasma samples due to its good selectivity, high sensitivity, and fast analysis. Its application was demonstrated through biodisposition and bioconversion studies of the coumarinic acid-based prodrug after intravenous administration in rats.
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Affiliation(s)
- Jerry Z Yang
- Department of Pharmaceutical Chemistry, The University of Kansas, 2095 Constant Avenue, Lawrence, KS 66047, USA
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Chen W, Yang JZ, Andersen R, Nielsen LH, Borchardt RT. Evaluation of the permeation characteristics of a model opioid peptide, H-Tyr-D-Ala-Gly-Phe-D-Leu-OH (DADLE), and its cyclic prodrugs across the blood-brain barrier using an in situ perfused rat brain model. J Pharmacol Exp Ther 2002; 303:849-57. [PMID: 12388672 DOI: 10.1124/jpet.102.037143] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 11/22/2022] Open
Abstract
The permeation characteristics of a model opioid peptide, H-Tyr-D-Ala-Gly-Phe-D-Leu-OH (DADLE), and its cyclic prodrugs [acyloxyalkoxy-based cyclic prodrug of DADLE (AOA-DADLE), coumarinic acid-based cyclic prodrug of DADLE (CA-DALE), and oxymethyl-modified coumarinic acid-based cyclic prodrug of DADLE (OMCA-DADLE)] across the blood-brain barrier (BBB) were determined using an in situ perfused rat brain model. The rat brains were perfused with Krebs-bicarbonate buffer containing test compounds in the absence or presence of a specific P-glycoprotein inhibitor (GF-120918). Brain samples were collected after perfusion and processed by a capillary depletion method. After liquid phase extraction with acetonitrile, samples were analyzed using high-performance liquid chromatography with tandem mass spectrometric detection. Linear uptake kinetics of DADLE and its cyclic prodrugs was observed within the range of 60 to 240 s of perfusion. The apparent permeability coefficient (P(app)) of DADLE across the BBB was very low (<10(-7) cm/s), probably due to its unfavorable physicochemical properties (e.g., charge, hydrophilicity, and high hydrogen-bonding potential). All three cyclic prodrugs, however, also exhibited low membrane permeation (P(app) <10(-7) cm/s) in spite of their more favorable physicochemical properties (e.g., no charge, high hydrophobicity, and low hydrogen-bonding potential). Inclusion of GF-120918 (10 microM) in the perfusates fully inhibited the P-gp activity in the BBB and dramatically increased the P(app) values of AOA-DADLE, CA-DADLE, and OMCA-DADLE by approximately 50-, 460-, and 170-fold, respectively. In contrast, GF-120918 had no effect on the P(app) value of DADLE. In addition, the observed bioconversions of the prodrugs to DADLE in the rat brains after 240-s perfusion were very low (5.1% from AOA-DADLE, 0.6% from CA-DADLE, and 0.2% from OMCA-DADLE), which was consistent with the in vitro bioconversion rates determined previously in rat brain homogenates.
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Affiliation(s)
- Weiqing Chen
- Department of Pharmaceutical Chemistry, The University of Kansas, 2095 Constant Avenue, Lawrence, KS 66047, USA
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Yang JZ, Chen W, Borchardt RT. In vitro stability and in vivo pharmacokinetic studies of a model opioid peptide, H-Tyr-D-Ala-Gly-Phe-D-Leu-OH (DADLE), and its cyclic prodrugs. J Pharmacol Exp Ther 2002; 303:840-8. [PMID: 12388671 DOI: 10.1124/jpet.102.037135] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [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: 11/22/2022] Open
Abstract
In vitro stability and in vivo pharmacokinetic studies of a model opioid peptide, H-Tyr-D-Ala-Gly-Phe-D-Leu-OH (DADLE), and its cyclic prodrugs (acyloxyalkoxy-based cyclic prodrug of DADLE, coumarinic acid-based cyclic prodrug of DADLE, and oxymethyl-modified coumarinic acid-based cyclic prodrug of DADLE) were conducted. The enzymatic stability of DADLE and its prodrugs in various biological media was determined at 37 degrees C in the presence and absence of paraoxon, a known esterase inhibitor. The prodrugs exhibited metabolic stability to exo- and endopeptidases, and esterase-catalyzed bioconversion of the prodrugs to DADLE was observed. For pharmacokinetic studies in rats, various biological samples (blood, bile, urine, and brain) were collected after i.v. administration of DADLE and its prodrugs. The samples were analyzed by high-performance liquid chromatography with tandem mass spectrometric detection, and the conversion from the prodrugs to intermediates to DADLE was monitored. The prodrugs exhibited similar pharmacokinetic properties and showed improved stability compared with DADLE in rat blood. This increased stability led to higher plasma concentrations of DADLE after i.v. administration of the prodrugs compared with i.v. administration of DADLE alone. In terms of elimination pathways, metabolism by endopeptidases was the major route for DADLE elimination, whereas rapid biliary excretion was the major route of elimination for the prodrugs. The rapid elimination of the prodrugs by the liver and the formation of stable intermediates after esterase hydrolysis limited the bioconversion efficiencies of the prodrugs to DADLE after i.v. administration. The substrate activity of the prodrugs for efflux transporters (e.g., P-glycoprotein) in the blood-brain barrier significantly restricted their access to the brain.
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Affiliation(s)
- Jerry Z Yang
- Department of Pharmaceutical Chemistry, The University of Kansas, 2095 Constant Avenue, Lawrence, KS 66047, USA
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Han SH, Zhuang YH, Zhang HX, Wang ZJ, Yang JZ. Phosphine and methane generation by the addition of organic compounds containing carbon-phosphorus bonds into incubated soil. Chemosphere 2002; 49:651-657. [PMID: 12430652 DOI: 10.1016/s0045-6535(02)00401-0] [Citation(s) in RCA: 7] [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: 05/24/2023]
Abstract
Formation of phosphine and methane in anaerobic incubation systems was investigated under stirred and unstirred conditions. The PH3 and CH4 levels in the headspace, as well as the matrix-bound PH3 content in the stirred soil, significantly increased upon the addition of phosphonoacetic acid (P(O)(OH)2CH2COOH). Both the levels of matrix-bound PH3 and CH4 are positively correlated to the buffered dithionite fraction of reactive phosphorus in the soil samples, while a negative correlation was observed between matrix-bound PH3/CH4 levels and the reactive phosphorus fraction.
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Affiliation(s)
- S H Han
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing
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Yang JZ, Zhou LX, Ding Y. [Studies on chemical constituents of oligostilbenes from Vitis davidii Foex]. Zhongguo Zhong Yao Za Zhi 2001; 26:553-5. [PMID: 12776371] [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: 03/02/2023]
Abstract
OBJECTIVE To study the chemical constituents of oligostilbenes from Vitis davidii. METHOD Compounds were isolated with polystyrene resin RA, silica gel and C18 column chromatography. The structures were elucidated by means of spectroscopic evidence. RESULT Seven compounds were obtained and identified as resveratrol, heyneanol A, ampelopsin E, amurensin B, (+)-epsilon-viniferin, vitisin A and amurensin G. CONCLUSION All the compounds were isolated from this plant for the first time.
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Affiliation(s)
- J Z Yang
- Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100050, China
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27
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Abstract
Levoglucosan (LG), 1,6-anhydro-beta-D-glucopyranose, was produced by pyrolysis of cellulose. A response surface method was used to optimize the reaction parameters: X1, temperature; X2, time required for heating cellulose from room temperature to the designed pyrolysis temperature; and X3, vacuum, and a Box-Behnken design was employed for this purpose. The optimal temperature and time were found to be 388 degrees C and 26.2 min by fixing the vacuum at 1 mm Hg. The levoglucosan prepared was fermented to citric acid by Aspergillus niger CBX-209, which was a mutant derived by gamma-ray mutagenesis of the parent strain CBX-2. The mutant could produce increasing citric acid with increasing LG purity and had a citric acid yield of 87.5% when using purified levoglucosan as the sole carbon source in a 5 day fermentation period.
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Affiliation(s)
- X L Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing
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Yang JZ, Walker BC. 0.09-terawatt pulses with a 31% efficient, kilohertz repetition-rate Ti:sapphire regenerative amplifier. Opt Lett 2001; 26:453-455. [PMID: 18040351 DOI: 10.1364/ol.26.000453] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We present an efficient, ultrafast regenerate amplifier that increases the energy of a laser pulse from 300 pJ to 6 mJ and produces average powers of as much as 9 W in a TEM(00) spatial mode. As an ultrafast amplifier, the system produces 4-mJ pulses with 0.09 TW of peak power.
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Yang JZ, Agarwal SK, Foster WG. Subchronic exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin modulates the pathophysiology of endometriosis in the cynomolgus monkey. Toxicol Sci 2000; 56:374-81. [PMID: 10910996 DOI: 10.1093/toxsci/56.2.374] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
An increase in the incidence and severity of endometriosis following treatment with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) was a serendipitous finding in a reproductive toxicology study in rhesus monkeys. The purpose of this study was to investigate the effects of subchronic exposure to TCDD on the survival and growth of surgically implanted endometrial fragments. Endometrial fragments of equal size (4 x 1 mm(2)) were auto-transplanted to the pelvic cavity of nulliparous cynomolgus monkeys (Macaca fascicularis, n = 23), who were divided into 4 treatment groups and dosed 5 days a week with gelatin capsules containing 0, 1, 5, or 25 ng/kg body weight of TCDD mixed with glucose. Endometrial implant survival was monitored by laparoscopy at intervals of 1, 3, and 6 months. Animals were euthanized at 12 months of treatment in the early to mid luteal phase and the maximal and minimal endometrial implant diameter was measured. Both the maximal and minimal diameters were significantly reduced in the 0.71-ng/kg/day-TCDD dose group, compared to controls, whereas the survival rate was unaffected (20 vs. 16%, respectively). In contrast, exposure to 3.57 and 17.86 ng/kg/day TCDD for 1 year resulted in a significantly higher survival rate of implants (26.7% and 33.3% respectively vs. 16.0%) and significantly larger diameter implants in the 17.86-ng/kg/day dose group only, compared to the control group. Treatment had no effect on circulating gonadal steroid levels or menstrual cycle characteristics. It is concluded that TCDD facilitates the survival of endometrial implants and exerts a bimodal effect on endometrial implant growth.
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Affiliation(s)
- J Z Yang
- Environmental and Occupational Toxicology Division, Health Protection Branch, Department of Health, Ottawa, Ontario, Canada
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Foster WG, Ruka MP, Gareau P, Foster RA, Janzen EG, Yang JZ. Morphologic characteristics of endometriosis in the mouse model: application to toxicology. Can J Physiol Pharmacol 1997. [DOI: 10.1139/y97-153] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Foster WG, Ruka MP, Gareau P, Foster RA, Janzen EG, Yang JZ. Morphologic characteristics of endometriosis in the mouse model: application to toxicology. Can J Physiol Pharmacol 1997; 75:1188-96. [PMID: 9431442] [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: 02/05/2023]
Abstract
Surgically induced endometriosis in the mouse has been described as a model to investigate the effect of environmental pollutants on the growth of endometriotic implants. The objectives of this study were to evaluate a modified surgical procedure to induce endometriosis and validate the model by comparing the effects of estrogen, 4-chlorodiphenyl ether (4-CDE) as a possible estrogenic contaminant, and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), a contaminant with predominantly anti-estrogenic activities, on the growth of endometrial implants. Uterine strips (1.0 x 4.0 mm2) were autotransplanted to multiple sites in the abdomen of sexually mature female B6C3F1 mice (n = 33), which were randomly assigned to the following groups: intact control (n = 4); ovariectomized (OVX, n = 9); OVX and treated with 4-CDE (n = 6); OVX and treated with 17 beta-estradiol (E2, n = 9); and OVX and treated with E2 plus TCDD (n = 5). Endometrial implants survived warm ischemia regardless of implant site and appeared as small clear spherical or ovoid fluid-filled cysts. The diameter of the endometrial cysts in the OVX animals was significantly (p < 0.0001) smaller compared with the intact animals and OVX animals replaced with E2 or 4-CDE. In contrast, TCDD treatment inhibited the growth of endometrial cysts in the presence of estrogen. We conclude that autotransplantation of uterine slices to multiple abdominal sites results in formation of endometriotic cysts that are responsive to estrogen, and that environmental contaminants possess the potential to affect the survival and growth of endometrial cysts. Therefore, we concluded that the mouse endometriosis model described in this paper has applications to investigate the possible role of environmental pollutants in the development of endometriosis.
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Affiliation(s)
- W G Foster
- Reproductive Toxicology Section, Department of Health, Ottawa, ON, Canada
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Abstract
The objectives of this study were to evaluate the effects of repeated injection of 4-chlorodiphenyl ether (4-CDE) on the survival and growth of endometriotic implants. Endometriosis was surgically induced in adult female B6C3F1 mice (n = 25) after ovariectomy. Seven days later the animals were randomly divided into five groups and treated with vehicle alone (corn oil, control), or 20 micrograms/kg/d estrone (positive control), or 10, 75, or 150 mg/kg/d 4-CDE in vehicle for 28 d. The number and size of the endometriotic cysts were recorded and the cysts were then harvested for histology at necropsy 2 d after the last treatment. There were significantly more cysts formed (P < 0.05) in the 150 mg/kg/d 4-CDE group compared to the vehicle-treated control (60 vs. 8%), but not compared to the estrone-treated positive control (90 vs. 60%). Hepatic enzymes were evaluated to confirm exposure and to further clarify the enzymatic route of 4-CDE biotransformation by the liver. In conclusion, the repeated exposure to 4-CDE increased the survival rates of the endometriotic cysts in the ovariectomized mouse, which suggests that 4-CDE mimics estrogen effects on endometriotic tissues because the endometrial tissues are dependent on estrogenic support for survival.
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Affiliation(s)
- J Z Yang
- Reproductive Toxicology Section, Department of Health, Ottawa, Ontario, Canada
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Yang JZ, Foster WG. Continuous exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin inhibits the growth of surgically induced endometriosis in the ovariectomized mouse treated with high dose estradiol. Toxicol Ind Health 1997; 13:15-25. [PMID: 9098947 DOI: 10.1177/074823379701300102] [Citation(s) in RCA: 22] [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: 02/04/2023]
Abstract
The objectives of this study were to evaluate the effects of repeated injection of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on the growth of endometriosis and the formation of adhesions in the mouse. Sexually mature female B6C3F1 mice (n = 19) were ovariectomized and subcutaneously implanted with a silastic capsule containing estradiol (E2). Uterine tissues in full thickness (I x I mm2, 5 pieces) from the left uterine horn were surgically autotransplanted to 5 different locations in the peritoneal cavity. One week later the animals were randomly assigned to four groups and treated with: vehicle alone (corn oil). 10.50 or 100 ng/kg/day TCDD for 28 days. Two days after last dose a necropsy was performed to measure the diameter of endometrial implants and to score the adhesions. Endometrial implants were harvested for histology and blood was collected for assessment of E2 levels. The diameter of endometrial implants was significantly smaller in the TCDD treated groups compared to the controls (p < 0.05). Survival of endometrial implants, the formation and scores of adhesions, and serum E2 levels were not significantly different among the dosing groups. Histology of implants showed a significant regression of endometrial tissues in the animals receiving 50 and 100 ng/kg/day TCDD compared to the controls. We conclude that continuous exposure to TCDD resulted in regression of the endometriotic implants in the ovariectomized mice treated with a high dose exogenous F2.
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Affiliation(s)
- J Z Yang
- Reproductive Toxicology Section, Department of Health Ottawa, Ontario, Canada
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Yang JZ, Van Vugt DA, Roy BN, Kennedy JC, Foster WG, Reid RL. Intrauterine 5-aminolevulinic acid induces selective endometrial fluorescence in the rhesus and cynomolgus monkey. J Soc Gynecol Investig 1996; 3:152-7. [PMID: 8796824] [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
OBJECTIVES To evaluate the selectivity of endometrial photosensitization after intrauterine 5-aminolevulinic acid administration in nonhuman primates, and to assess acute and chronic systemic toxicity after intravenous (i.v.) delivery of 5-aminolevulinic acid. METHODS Ovariectomized cynomolgus monkeys (n = 19) aged 6-18 years and ovariectomized rheusus monkeys (n = 3) aged 9-14 years were used in these studies, 5-aminolevulinic acid at various doses was administered by a transfundal (n = 8), transcervical (n = 3), or i.v. (n = 11) route. Spectrophoto-fluorometric readings and fluorescence microscopy were used to assess 5-aminolevulinic acid-induced photosensitization of uterine tissues; respiration, heart rate, blood biochemistry, and behavior were used to evaluate potential acute and delayed systemic toxicity. RESULTS Endometrial fluorescence was achieved in all animals after administration of 5-aminolevulinic acid. Characteristic spectrophotofluorescence peaks of protoporphyrin IX (PpIX) in the endometrium but not myometrium confirmed selective endometrial PpIX production from 5-aminolevulinic acid. A transient (less than 1 week) increase in serum aspartate aminotransferase was observed after systemic instillation of 5-aminolevulinic acid in dosages 24-50-fold greater than that required to induce endometrial photosensitization after intrauterine injection. CONCLUSIONS The endometrium but not myometrium in nonhuman primates is capable of converting 5-aminolevulinic acid into protoporphyrin IX. At large doses, systemic 5-aminolevulinic acid causes a transient increase in the serum aspartate aminotransferase level. No other evidence of acute or delayed systemic toxicity was observed.
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Affiliation(s)
- J Z Yang
- Department of Obstetrics and Gynecology, Queen's University, Kingston, Ontario, Canada
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Yang JZ, Van Dijk-Smith JP, Van Vugt DA, Kennedy JC, Reid RL. Fluorescence and photosensitization of experimental endometriosis in the rat after systemic 5-aminolevulinic acid administration: a potential new approach to the diagnosis and treatment of endometriosis. Am J Obstet Gynecol 1996; 174:154-60. [PMID: 8572000 DOI: 10.1016/s0002-9378(96)70388-5] [Citation(s) in RCA: 23] [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: 01/31/2023]
Abstract
OBJECTIVE Our purpose was to evaluate and compare the conversion of 5-aminolevulinic acid into the endogenous photosensitizer protoporphyrin IX in experimentally induced endometriosis and in other normal tissues in a rat model. STUDY DESIGN Fluorescence of experimental endometriotic lesions, uterus, peritoneum, bowel mesentery, bladder, eye, skin, and skeletal muscle was assessed 3 hours after either intravenous, oral, or intrauterine administration of 5-aminolevulinic acid with use of spectrophotofluorometry. In another experiment the fluorescence of surgically induced endometriosis and adjacent normal peritoneum was evaluated every 15 minutes after 5-aminolevulinic acid administration to assess the time course of protoporphyrin IX production. RESULTS In the rat endometriosis model intralesional and systemic 5-aminolevulinic acid produced fluorescence within implants showing viable endometrial cells. Treatment with 5-aminolevulinic acid produced low-intensity fluorescence in peritoneum, bowel mesentery, and eye. Relatively intense fluorescence was seen in skin, bladder, and uterus. No fluorescence was observed in skeletal muscle. The intensity of fluorescence varied with the dosage and route of administration of 5-aminolevulinic acid. Fluorescence intensity of protoporphyrin IX was significantly greater in implants than in adjacent normal peritoneum between 2 and 4 hours after treatment. CONCLUSIONS Protoporphyrin IX fluorescence in experimentally induced endometriosis lesions after intravenous and oral delivery of 5-aminolevulinic acid was significantly greater than the fluorescence detected in adjacent normal peritoneum.
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Affiliation(s)
- J Z Yang
- Department of Obstetrics and Gynecology, Queen's University, Kingston, Ontario, Canada
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Yang JZ, Greer PA, van Vugt DA, Reid RL. Treatment with 5-aminolevulinic acid and photoactivating light causes destruction of preimplantation mouse embryos. Fertil Steril 1995; 63:1088-93. [PMID: 7720923] [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: 01/26/2023]
Abstract
OBJECTIVE To evaluate the direct effect of photodynamic treatment with 5-aminolevulinic acid (ALA) on preimplantation mouse embryos in an in vitro setting. DESIGN Preimplantation mouse embryos were incubated with or without ALA for 5 hours and followed immediately by light exposure for 0, 5, or 15 minutes. Comparison of the viability and blastocyst formation was made among different treatment groups. SETTING A conventional laboratory setting with embyro culture facilities. INTERVENTIONS Female CD1 mice were superovulated with pregnant mare serum gonadotropin and hCG before mating. Four-and eight-cell embryos and compacted morulae were flushed from the oviducts and incubated with 0, 0.1, 0.5, 1.0, or 5.0 mM ALA for 5 hours. Embryos subsequently were exposed to photoactivating light for 0, 5, or 15 minutes. MAIN OUTCOME MEASURES Microscopic assessment of embryos quality at 12 hours and determination of the percentage of embryos progressing to the blastocyst stage at 36 or 60 hours. RESULTS Incubation of embryos with 0.1, 0.5, 1.0, 5.0 mM ALA without light resulted in 87.3% +/- 1.6%, 84.9% +/- 3.4%, 81.4% +/- 1.8%, and 82.8% +/- 4.7% of the embryos developing to blastocysts, respectively. In the absence of ALA, light exposure for 0, 5, or 15 minutes resulted in 93.8% +/- 2.3%, 92.3% +/- 2.2%, and 85.9% +/- 1.7% blastocyst formation. Combining treatment of ALA at the same concentrations with light resulted in 33.3% +/- 2.1%, 0.7% +/- 0.9%, 0%, 0% (5-minute light), 13.3% +/- 1.0%, 0%, 1.6% +/- 1.3%, 0% (15-minute light) blastocyst formation, respectively. When gross morphology was used to assess embryo viability at 12 hours, similar results were observed. Measurement of the fluorescent spectrum of embryos incubated with ALA indicated that protoporphyrin IX had been formed. CONCLUSION Photodynamic ablation of mouse embryos was achieved with ALA under in vitro conditions. These results indicate that preimplantation mouse embryos are capable of converting ALA to the photosensitizer, protoporphyrin IX, and are susceptible to subsequent photoablation. A photodynamic effect on the embryo may be important to the successful application of this technique to the treatment of human ectopic pregnancy.
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Affiliation(s)
- J Z Yang
- Department of Obstetrics and Gynecology, Queen's University, Kingston, Ontario, Canada
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Yang JZ, Van Vugt DA, Melchior MF, Hahn PM, Reid RL. Photodynamic ablation of early pregnancy in the rat with 5-aminolevulinic acid: a potential new therapy for tubal ectopic pregnancy in the human. Fertil Steril 1994; 62:1060-5. [PMID: 7926119 DOI: 10.1016/s0015-0282(16)57074-5] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
OBJECTIVE To determine whether systemic 5-aminolevulinic acid (ALA) could produce photosensitization and photodynamic ablation of early pregnancy in the rat. SETTING A conventional laboratory setting. PATIENTS Female Sprague-Dawley rats, weighing 220 to 275 g at the time of breeding. INTERVENTIONS Rats at 10 days of gestation were injected IV with saline, 20 or 200 mg/kg ALA. Three hours later, the abdominal cavity was opened to record the number of fetuses in both uterine horns. One or both uterine horns were exposed to photoactivating light at 630 nm for 0, 5, 15, or 30 minutes. MAIN OUTCOME MEASURES Mean fetal survival rate was determined 7 days after treatment. RESULTS The mean +/- SEM fetal survival rates in groups (n = 6) treated with saline, 20 or 200 mg/kg ALA followed by 30-minute light exposure were 90.8% +/- 2.8%, 16.0% +/- 4.9%, and 0%, respectively. The mean +/- SEM fetal survival rates in groups (n = 6) treated with 200 mg/kg ALA followed by 0-, 5-, 15-, or 30-minute light exposure were 71.3% +/- 11.8%, 8.9% +/- 6.2%, 0.9% +/- 1.3%, and 0%, respectively. CONCLUSIONS We conclude that systemic ALA followed by transmural exposure to photoactivating light (630 nm) results in resorption of early pregnancies in the rat. This approach could potentially be developed as a new treatment for human ectopic pregnancy.
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Affiliation(s)
- J Z Yang
- Department of Physiology, Queens's University, Kingston, Ontario, Canada
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Abstract
We report here our preliminary experience with percutaneous endoscopic polypectomy of gallbladder polyps. Five patients with a total of 17 cholesterol polyps (size: 4-6 mm) and one patient with two gallbladder adenomas (size: 5 mm), four of whom were symptomatic and all of whom refused cholecystectomy, underwent a single-stage procedure under epidural anesthesia. All patients had functioning gallbladders, as assessed by oral cholecystography after stimulation. Following a small incision, the gallbladder was pulled out of the abdominal wall, incised, and a cholecystoscope introduced. The polyps were coagulated at their stalk using microwave irradiation (70-80 mA, 9 sec) and removed for histopathological evaluation thereafter. A catheter was left in situ for ten days. Follow-up for a mean of 11.6 months (8-16 months) showed all patients to be symptom-free and without recurrence of polyps on ultrasonography. Gallbladder function was assessed in five cases by meal-stimulated oral cholecystography, and in one by hepato-iminodiacetate acid (HIDA) scan and was found to be well preserved. The preliminary results warrant further evaluation of this method of removing indeterminate gallbladder polyps.
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Affiliation(s)
- Z L Ji
- Departments of General and Biliary Surgery, Affiliated Hospital, Nanjing Railway Medical College, Jiangsu, China
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Affiliation(s)
- Z L Ji
- Department of General and Biliary Surgery, Affiliated Hospital, Nanjing Railway Medical College, People's Republic of China
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Yang JZ, Van Vugt DA, Kennedy JC, Reid RL. Intrauterine 5-aminolevulinic acid induces selective fluorescence and photodynamic ablation of the rat endometrium. Photochem Photobiol 1993; 57:803-7. [PMID: 8337251 DOI: 10.1111/j.1751-1097.1993.tb09214.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [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: 01/30/2023]
Abstract
5-Aminolevulinic acid (ALA), a precursor of protoporphyrin IX (Pp IX), was administered into the rat uterine cavity in an attempt to selectively ablate the endometrium. Doses of ALA ranging from 4 to 50 mg were injected into one uterine horn of rats while the vehicle (saline) was injected into the contralateral horn. Animals were divided into three groups. In group one, the uterine horns were removed and processed for either fluorescent microscopy or spectrophotofluorometry 3 h later. In group two, rats were allowed to survive for either 2 or 10 days, and then the uterine horns were harvested and processed histologically. In group three, both uterine horns were exposed to transmural light (approximately 150 J/cm2) 3 h after administration of ALA or saline and processed histologically either 2 or 10 days later. Fluorescent microscopy showed fluorescence in the endometrium and not in the myometrium. The maximum emission spectra of endometrial fluorescence occurred at 630 and 690 nm, characteristic of Pp IX. In contrast, no fluorescence was detected in saline-treated uterine horns. Light exposure resulted in extensive damage only to the ALA-treated endometrium. There was no indication of regeneration 10 days after treatment. We conclude from these studies that ALA administered into the lumen of the rat uterus is selectively converted into Pp IX within the endometrium. Furthermore, photoactivation of the Pp IX results in selective ablation of the endometrium.
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Affiliation(s)
- J Z Yang
- Department of Physiology, Queen's University, Kingston, Ontario, Canada
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Yang JZ, Van Vugt DA, Kennedy JC, Reid RL. Evidence of lasting functional destruction of the rat endometrium after 5-aminolevulinic acid-induced photodynamic ablation: prevention of implantation. Am J Obstet Gynecol 1993; 168:995-1001. [PMID: 8456915 DOI: 10.1016/s0002-9378(12)90859-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [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: 01/30/2023]
Abstract
OBJECTIVE We evaluated disruption of endometrial function after treatment with 5-aminolevulinic acid with or without light exposure. STUDY DESIGN In a conventional laboratory setting adult Sprague-Dawley female rats were treated with various doses of 5-aminolevulinic acid in one uterine horn and saline in the contralateral horn. Three hours after treatment both uterine horns were exposed to light, and the rats were bred to a fertile male 10 or 60 days later. Ablation of endometrium was evaluated by both rate of implantation and histologic features. RESULTS In the absence of light exposure 5-aminolevulinic acid had no significant effect on the rate of implantation, compared with saline (76% vs 92%, n = 25, p > 0.05). In contrast, 5-aminolevulinic acid treatment plus light exposure profoundly decreased the rate of implantation in the 5-aminolevulinic acid-treated uterine horns of rats bred 10 days (3.8% vs 100%, n = 26, p < 0.001) or 60 days after treatment (16.7% vs 100%, n = 24, p < 0.001). Histologic examination revealed that the 5-aminolevulinic acid plus light-treated uterine horns were completely devoid of endometrium. CONCLUSION Photodynamic treatment with 5-aminolevulinic acid resulted in a persistent disruption of rat endometrial function and was consistent with the histologic evidence of complete endometrial ablation. In addition, a partial destruction of myometrium adjacent to endometrium was observed. The myometrial damage may be through a nonphotodynamic mechanism because myometrium is unable to synthesize protoporphyrin IX from 5-aminolevulinic acid.
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Affiliation(s)
- J Z Yang
- Department of Physiology, Queen's University, Kingston, Ontario, Canada
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Ji ZL, Chen HR, Lei RQ, Yang JZ, Huang MH. Cystic duct occlusion by microwave tissue coagulator in rabbits. J R Coll Surg Edinb 1991; 36:395-8. [PMID: 1774708] [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: 12/28/2022]
Abstract
In this preliminary study a flexible bipolar microwave electrode, 1.8 mm in diameter, was designed to occlude the cystic duct in 18 rabbits. Thermal model tests were performed to evaluate the effect of the antenna and to master the coagulating condition. Through surgical cholecystostomy, the antenna was inserted into the proximal cystic duct for various coagulation treatments. Cholecystography showed that the cystic duct was occluded minutes to hours after coagulation. Histologically, the microwave technique induced a chronic inflammation and fibrosis which eventually obliterated the coagulated cystic duct permanently. In group A (30 mA for 20 s) the cystic duct epithelium regeneration occurred and surrounding liver damage was limited, while in groups B (50 mA for 10 s) and C (70 mA for 6 s) no epithelium regeneration was observed and injury to the liver was mild to moderate. It was found that microwaves generated at 50 mA for 10 s to occlude the rabbit's cystic duct are effective and less injurious.
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Affiliation(s)
- Z L Ji
- Department of Surgery, Nanjing Railway Medical College, Jiangsu, China
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Yang JZ. [Diagnosis and treatment of insulinomas--analysis of 6 cases]. Zhonghua Zhong Liu Za Zhi 1989; 11:389-91. [PMID: 2559838] [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: 01/01/2023]
Abstract
Six patients with insulinoma treated from 1977-1986 are analysed. All patients had symptoms of neuro-glucopenia, hypoglycemic coma and sympathetic irritation. The fasting blood glucose level was below 30 mg%. The fasting plasma IRI was 17.3-19.84 mu u/ml and the IRI/glucose ratio was greater than 0.3 in four patients. The symptoms disappeared after the tumor was removed in three patients. One patient was complicated by pancreatic fistula after tumor resection, but was cured by drainage. One patient who had multi-insulinomas undiagnosed preoperatively had Whipple's triad after operation. One was treated by other methods because of his cardiovascular disorders. The percutaneous transhepatic portal catheterization segment IRI assay is a reliable method, especially when combined with abdominal selective arteriography, for the pre-operative diagnosis of insulinoma. The IRI/glucose ratio is more reliable than either glucose or IRI alone.
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Affiliation(s)
- J Z Yang
- Affiliated Hospital, Nanjing Railway Medical College
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Yang JZ, Gao ZQ, Huang ZY. [Hyperfunctioning parathyroid carcinoma]. Zhonghua Zhong Liu Za Zhi 1987; 9:63-4. [PMID: 3595430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Two cases of parathyroid carcinoma with hyperparathyroidism, a relatively rare endocrine tumor are reported. It accounts for approximately 1-4% of all cases of primary hyperparathyroidism. Parathyroid crisis occurred for three times in one case. It is difficult to make an early diagnosis, frequently leading to misdiagnosis and wrong treatment. During operation iatrogenic implant or incomplete resection may occur, resulting in recurrence and repeated operations. It is important to differentiate from hypercalcemia caused by parathyroid adenoma. Neck mass, hypercalcemia usually above 14 mg%, severe decalcification and pathological fractures are characteristic. Fibrosis and inflammatory reaction of the tumor and metastases in the neck lymph nodes are commonly seen at operation. Histologically active tumor cell mitosis, capsular and vascular invasions usually exist. Local recurrences often occur after surgical treatment. If the surgeon can recognized the malignant change and give a curative resection in the initial operation, more gratifying results can be obtained.
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Sun BZ, Yang JZ, Shen SY. [Chromosome changes in refractory anemia: a report of 15 cases]. Zhonghua Nei Ke Za Zhi 1986; 25:7-9, 62. [PMID: 3731954] [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: 01/07/2023]
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Yang JZ. [Changes in cyclic AMP of the lung tissue and plasma in experimental silicosis]. Zhonghua Jie He He Hu Xi Xi Ji Bing Za Zhi 1983; 6:280-1. [PMID: 6327208] [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: 01/19/2023]
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Abstract
The radiographic findings of 200 cases of meconium peritonitis were analyzed; 194 cases were discovered in newborn infants and six cases in fetuses. The radiographic features in the newborn group could be categorized as pneumoperitoneum with intestinal obstruction (adhesions) and calcification (35 cases), intestinal obstruction with calcification (143 cases), intestinal obstruction with no radiographically visible calcification (5 cases), and calcification alone (11 cases). All six cases of the fetal group were diagnosed when the mothers had been hospitalized for polyhydramnios and a plaque-like or ring-like calcification showed up in the fetal abdomen on the plain radiograph. Meconium peritonitis is one of the few conditions that can be diagnosed before birth and is almost the only condition around the time of birth to produce calcification in the abdomen. Therefore, if there is any sign of polyhydramnios, radiographs or ultrasonograms of the maternal abdomen should be obtained to detect any calcification within the peritoneal cavity of the fetus. A simple experiment carried out in rats showed that it takes at least eight days after the meconium escapes into the peritoneal cavity for calcification in the meconium to be radiographically demonstrable.
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