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Chen XZ, He WX, Luo RG, Xia GJ, Zhong JX, Chen QJ, Huang YY, Guan YX. KLF14/miR-1283/TFAP2C axis inhibits HER2-positive breast cancer progression via declining tumor cell proliferation. Mol Carcinog 2023; 62:532-545. [PMID: 36752341 DOI: 10.1002/mc.23505] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 11/29/2022] [Accepted: 12/07/2022] [Indexed: 02/09/2023]
Abstract
MiR-1283 has been identified as a tumor suppressor in some malignancies. Whereas, the role of miR-1283 in HER2-positive (HER2+) breast cancer, particularly its role in regulating cell proliferation, one of the most significant features of tumor progression, is unclear. The related microRNA screened by the breast cancer sample GSE131599 dataset were detected in HER2+ breast cancer tissues and cell lines. Then, the obtained miR-1283 was overexpressed in SKBR3 and BT-474 cells followed by relevant functional assays concerning cell proliferation and apoptosis. The xenograft mouse model was induced and the effect of miR-1283 on tumor growth and cell proliferation was examined. The target of miR-1283 and the transcription factor regulating miR-1283 were predicted and identified. Finally, the influence of transcription factor KLF14 on cell proliferation and apoptosis was investigated. An integrated analysis confirmed that miR-1283 expression was significantly decreased in HER2+ breast cancer tissues. Also, by q-RT-PCR detection, miR-1283 expression was markedly reduced in HER2+ breast cancer tissues and cell lines. The miR-1283 overexpression prevented the proliferation and enhanced apoptosis of HER2+ breast cancer cells, as well as inhibited tumor growth. Mechanistically, miR-1283 inhibited TFAP2C expression by targeting the 3'-untranslated regions of TFAP2C messenger RNA, and the KLF14 enhanced miR-1283 level via binding to its promoter. The result subsequently confirmed the KLF14/miR-1283 signaling suppressed cell proliferation in HER2+ breast cancer. Our results suggested that the KLF14/miR-1283/TFAP2C axis inhibited HER2+ breast cancer progression, which might provide novel insight into mechanical exploration for this disease.
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Affiliation(s)
- Xue-Zhong Chen
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Wen-Xing He
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Rong-Guang Luo
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Guo-Jin Xia
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jin-Xiu Zhong
- Department of Breast Cancer Center/Nuclear Medicine, The Affiliated Cancer Hospital of Nanchang University, Nanchang, China
| | - Qing-Jie Chen
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yu-Ying Huang
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yan-Xing Guan
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China
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He WX, Yu Q. [New advances in vital pulp therapy and pulp regeneration for the treatment of pulpitis: from basic to clinical application]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:16-22. [PMID: 35012247 DOI: 10.3760/cma.j.cn112144-20210917-00417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In recent years, great progress has been made in research on the treatment of pulpitis, mainly due to the rapid development of basic and clinical researches in this field, and some achievement from basic research has been applied in clinical practice. Advances in the diagnostic methods for pulpitis can help the clinicians to recognize the true state of pulpitis more accurately and to adopt the corresponding treatment methods including indirect/direct pulp capping, pulpotomy, pulp regeneration and root canal therapy. The new theory of pulpitis diagnosis and the studies on immune defense, repair function of dental pulp and new pulp capping materials have significantly improved the success rate of vital pulp therapy. For diffuse coronary pulpitis or radicular pulpitis, which is difficult to achieve vital pulp therapy successfully, methods of pulp revascularization, cell homing and pulp stem cells-mediated pulp regeneration can also be used as treatment options in addition to root canal therapy. The present article focuses on the research progress on pulpitis treatments and related clinical transformation practices, in order to provide reference on vital pulp therapy and pulp regeneration for clinicians.
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Affiliation(s)
- W X He
- Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
| | - Q Yu
- Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
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Burwood G, He WX, Fridberger A, Ren TY, Nuttall AL. Outer hair cell driven reticular lamina mechanical distortion in living cochleae. Hear Res 2021; 423:108405. [PMID: 34916081 DOI: 10.1016/j.heares.2021.108405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 10/25/2021] [Accepted: 11/25/2021] [Indexed: 11/17/2022]
Abstract
Cochlear distortions afford researchers and clinicians a glimpse into the conditions and properties of inner ear signal processing mechanisms. Until recently, our examination of these distortions has been limited to measuring the vibration of the basilar membrane or recording acoustic distortion output in the ear canal. Despite its importance, the generation mechanism of cochlear distortion remains a substantial task to understand. The ability to measure the vibration of the reticular lamina in rodent models is a recent experimental advance. Surprising mechanical properties have been revealed. These properties merit both discussion in context with our current understanding of distortion, and appraisal of the significance of new interpretations of cochlear mechanics. This review focusses on some of the recent data from our research groups and discusses the implications of these data on our understanding of vocalization processing in the periphery, and their influence upon future experimental directions. This article is part of the Special Issue Outer hair cell Edited by Joseph Santos-Sacchi and Kumar Navaratnam.
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Affiliation(s)
- G Burwood
- Department of Otolaryngology, Head and Neck Surgery, Oregon Health & Science University, Portland OR, United States
| | - W X He
- Department of Otolaryngology, Head and Neck Surgery, Oregon Health & Science University, Portland OR, United States
| | - A Fridberger
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - T Y Ren
- Department of Otolaryngology, Head and Neck Surgery, Oregon Health & Science University, Portland OR, United States
| | - A L Nuttall
- Department of Otolaryngology, Head and Neck Surgery, Oregon Health & Science University, Portland OR, United States.
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Zhong JX, Kong YY, Luo RG, Xia GJ, He WX, Chen XZ, Tan WW, Chen QJ, Huang YY, Guan YX. Circular RNA circ-ERBB2 promotes HER2-positive breast cancer progression and metastasis via sponging miR-136-5p and miR-198. J Transl Med 2021; 19:455. [PMID: 34732216 PMCID: PMC8564996 DOI: 10.1186/s12967-021-03114-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 10/09/2021] [Indexed: 12/21/2022] Open
Abstract
Background Circular RNAs (circRNAs) are pivotal regulators of various human cancers and circ-ERBB2 is abnormally expressed in breast cancer cells. However, the role and mechanism of circ-ERBB2 in HER2-positive breast cancer are still unknown. Methods The circ-ERBB2 expressions in the tumor tissues of HER2-positive breast cancer patients were tested using quantitative real-time PCR. The circ-ERBB2 function was investigated by cell counting kit 8 assay, Transwell, flow cytometry and Western blot. Mechanistically, fluorescence in situ hybridization, RNA immunoprecipitation, RNA pull-down and dual-luciferase reporter gene assays were conducted to confirm the interaction between circ-ERBB2 and miR-136-5p or miR-198 in HER2-positive breast cancer cells. Results Circ-ERBB2 was elevated in the tumor tissues of HER2-positive breast cancer patients. Functionally, the interference with circ-ERBB2 repressed HER2-positive breast cancer cell proliferation, migration, invasion and accelerated cell apoptosis. Furthermore, the mechanistic analysis corroborated that circ-ERBB2 acted as a competing endogenous RNA for miR-136-5p or miR-198 to relieve the repressive influence of miR-136-5p or miR-198 on its target transcription factor activator protein 2C (TFAP2C). Meanwhile, in vivo assays further corroborated the oncogenic function of circ-ERBB2 in HER2-positive breast cancer. Conclusions Circ-ERBB2 accelerated HER2-positive breast cancer progression through the circ-ERBB2/miR-136-5p/TFAP2C axis or the circ-ERBB2/miR-198/TFAP2C axis. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-03114-8.
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Affiliation(s)
- Jin-Xiu Zhong
- Department of Breast Cancer Center/Nuclear Medicine, The Affiliated Cancer Hospital of Nanchang University, Nanchang, 330029, China
| | - Yun-Yuan Kong
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China
| | - Rong-Guang Luo
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China
| | - Guo-Jin Xia
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China
| | - Wen-Xing He
- Department of Breast Cancer Center/Nuclear Medicine, The Affiliated Cancer Hospital of Nanchang University, Nanchang, 330029, China
| | - Xue-Zhong Chen
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China
| | - Wei-Wei Tan
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China
| | - Qing-Jie Chen
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China
| | - Yu-Yin Huang
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China
| | - Yan-Xing Guan
- Department of Nuclear Medicine/Radiology, The First Affiliated Hospital of Nanchang University, No. 17 Yong Wai Street, Nanchang, 330006, Jiangxi, China.
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Yuan Y, Wang LY, Mei J, Cheng Y, Wang W, Chu L, Tang J, Li N, Li HH, He WX, Yang LL, Chen J, Bai YS, Wu Y, Liang JB, Sun SY, Zhang X, Yang XD. [Protective effect of excretory-secretory protein from adult Trichinella spiralis on ovalbumin-induced allergic rhinitis in mice]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2019; 31:504-509. [PMID: 31713379 DOI: 10.16250/j.32.1374.2019069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate the protective effect of excretory-secretory protein (AES) from adult Trichinella spiralis on ovalbumin (OVA)-induced allergic rhinitis in mice. METHODS Eighteen female BALB/c mice were randomly divided into three groups, including the blank control group (Group A), OVA-induced rhinitis group (Group B) and AES treatment group (Group C). Mice in Group A were given PBS. Mice in Group B were intraperitoneally injected with antigen adjuvant suspension for systemic sensitization, once every other day for seven times; then, local excitation was intranasally induced with 5% OVA solution once a day for seven times to establish a mouse model of allergic rhinitis. In addition to induction of allergic rhinitis, mice in Group C were given 25 μg AES at baseline sensitization and local excitation. Following the final challenge, mice were observed for 30 min in each group, and the behavioral score was evaluated. The serum levels of IFN-γ, IL-4, IL-5, IL-10 and TGF-β were determined using an enzyme-linked immunosorbent assay in mice, and the pathological changes of mouse nasal mucosa were observed under a microscope. RESULTS There was a significant difference in the mouse behavioral scores among the three groups (F = 110.12, P < 0.01). The mouse behavioral score was significantly higher in Group B than in Group A (7.17 ± 0.75 vs. 1.33 ± 0.52, P < 0.01), and more remarkable pathological damages of mouse nasal mucosa were seen in Group B than in Group A, while the mouse behavioral score was significantly decreased in Group C than in Group B (P < 0.01), and the pathological damages of mouse nasal mucosa remarkably alleviated in Group C relative to Group B. There was a significant difference in serum IFN-γ level among the three groups (F = 7.50, P < 0.01) and the serum IFN-γ level in Group B was significantly lower than in group A and C (both P < 0.05). There were significant differences in serum IL-4 (F = 470.81, P < 0.01) and IL-5 levels (F =68.20, P < 0.01) among the three groups, and significantly greater serum IL-4 and IL-5 levels were detected in Group B than in Group A (P < 0.01), while significantly lower serum IL-4 and IL-5 levels were detected in Group C than in Group B (P < 0.01). There were significant differences in serum IL-10 (F = 174.91, P < 0.01) and TGF-β levels (F = 9.39, P < 0.01) among the three groups, and significantly greater serum IL-10 and TGF-β levels were seen in Group C than in Group B (both P < 0.05). CONCLUSIONS T. spiralis AES has a remarkable protective activity against OVA-induced allergic rhinitis in mice.
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Affiliation(s)
- Y Yuan
- Department of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China.,Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - L Y Wang
- Department of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China.,Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - J Mei
- The Second Affiliated Hospital of Bengbu Medical College, China
| | - Y Cheng
- Department of Pathogenic Infection and Immunity, Wuxi Medical School, Jiangnan University, China
| | - W Wang
- The First Affiliated Hospital of Bengbu Medical College, China
| | - L Chu
- The Second Affiliated Hospital of Bengbu Medical College, China
| | - J Tang
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - N Li
- Department of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
| | - H H Li
- Department of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
| | - W X He
- Department of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
| | - L L Yang
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - J Chen
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - Y S Bai
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - Y Wu
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - J B Liang
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - S Y Sun
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - X Zhang
- Anhui Provincial Key Laboratory of Infection and Immunity, China
| | - X D Yang
- Department of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China.,Anhui Provincial Key Laboratory of Infection and Immunity, China
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Guo GM, He WX. [New insights on drug-induced vasculitis]. Zhonghua Er Ke Za Zhi 2019; 57:567-570. [PMID: 31269561 DOI: 10.3760/cma.j.issn.0578-1310.2019.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- G M Guo
- Department of Pediatric Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - W X He
- Department of Nephrology, Children's Hospital of Shanghai Jiao Tong University, Shanghai 200062, China
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He WX, Jiang C, Liu XG, Huang W, Chen C, Jiang L, Yang B, Wu K, Chen QK, Yang Y, Yu YM, Jiang GN. [Short-term outcomes of lung transplant recipients using organs from brain death donors]. Zhonghua Wai Ke Za Zhi 2016; 54:894-897. [PMID: 27916030 DOI: 10.3760/cma.j.issn.0529-5815.2016.12.004] [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 assess short-term outcomes after lung transplantation with organs procured following brain death. Methods: Between April 2015 and July 2016, all 17 recipients after lung transplantation using organs from brain death donors (DBD) at Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine were enrolled in this study. All patients were male, aging (60±7) years, including 11 chronic obstructive pulmonary disease, 5 idiopathic pulmonary fibrosis, 1 silicosis. Seventeen donors were 16 males and 1 female, with 10 traumatic brain injury, 5 cerebrovascular accident and 2 sudden cardiac death. Of 17 recipients receiving DBD lung transplant, 16 were single lung transplant. Data were collected including intubation duration of mechanical ventilation, hospital length of stay, incidence of pulmonary infection bronchus anastomosis complications, primary graft dysfunction (PGD), and acute rejection, bronchiolitis obliterans syndrome (BOS) as well as mortality of 90-day after lung transplantation. Results: Median duration of intubation were 2 (2) days (M(QR)) in recipients after lung transplantation. The incidence of pulmonary infection and bronchus anastomosis complications were 15/17 and 5/17, respectively. Median length of stay in hospital were 56 (19) days. The ratio of readmission 1 month after discharge were 10/17. Mortality of 90-day post-transplant were 2/17. The incidence of PGD and BOS were 1/17 and 2/17, respectively. Conclusion: Recipients with DBD lung transplantation have an acceptable survival during short-term follow-up, but with higher incidences of complications related to infection post-transplantation.
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Affiliation(s)
- W X He
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
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Abstract
Since laser was introduced in the field of medicine in 1970's, its application range has continuously expanded. The application of laser in endodontics also increased due to its safety and effectiveness in dental treatments. The majority of the laser application researches in dentistry focused on dentin hypersensitivity, removal of carious tissues, tooth preparations, pulp capping or pulpotomy, and root canal treatment. In this article, we reviewed literature on the effects of laser in the treatments of dental and pulp diseases.
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Affiliation(s)
- W X He
- Department of Operative Dentistry & Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Resrarch Center for Oral Diseases & Shanxi Key Laboratory of Oral Diseases, Xi'an 710032, China
| | - N N Liu
- Department of Operative Dentistry & Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Resrarch Center for Oral Diseases & Shanxi Key Laboratory of Oral Diseases, Xi'an 710032, China
| | - X L Wang
- Department of Operative Dentistry & Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Resrarch Center for Oral Diseases & Shanxi Key Laboratory of Oral Diseases, Xi'an 710032, China
| | - X Y He
- Department of Operative Dentistry & Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Resrarch Center for Oral Diseases & Shanxi Key Laboratory of Oral Diseases, Xi'an 710032, China
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Pang JL, Wu BL, He WX, Zhang YQ, Zhao HP, Xie ZH. Effect of antisense oligonucleotide against mouse dentine matrix protein 1 on mineralization ability and calcium ions metabolism in odontoblast-like cell line MDPC-23. Int Endod J 2006; 39:527-37. [PMID: 16776757 DOI: 10.1111/j.1365-2591.2006.01104.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIM To study the mineralization ability and the dynamic changes of intracellular and extracellular concentrations of calcium ions in the odontoblast-like cell line MDPC-23 affected by antisense oligonucleotide (AS-ODN) against mouse dentine matrix protein 1 (DMP1). METHODOLOGY The expression of DMP1 in MDPC-23 cells was detected by an immunohistochemical method and its blocking outcome by the Western blot method. The alkaline phosphatase (ALP) activity, size and number of mineralized nodules, and the intracellular free ([Ca2+]if), total ([Ca2+]it) and the extracellular ([Ca2+]e) calcium ion concentrations in MDPC-23 cells in the experimental group affected with AS-ODN were compared with those in the control group (paired-samples t-test). RESULTS Dentine matrix protein 1 was stably expressed in a stable way in MDPC-23 cells; the expression was only just detectable at 12 h and became negative after 24 h affected by AS-ODN. Compared with the control groups, ALP activity of MDPC-23 cells in the AS-ODN group was decreased (P < 0.05), and both the number and size of mineralized nodules were smaller than those in the control group. [Ca2+]if in the AS-ODN group increased and then decreased after 24 h. [Ca2+]it dropped substantially to the lowest point at 24 h (P < 0.01). [Ca2+]e increased before treatment for 24 h and then dropped, however, it was still higher than that of the control group. CONCLUSIONS Antisense oligonucleotide against DMP1 could decrease mineralization ability and affect the intracellular and extracellular concentrations of calcium ions in MDPC-23 cells. This would indicate that DMP1 regulates the metabolism and transportation of calcium ions in odontoblasts, and thus boosts dentine mineralization.
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Affiliation(s)
- J L Pang
- Department of Operative Dentistry and Endodontics, Qindu Stomatological Hospital, The Fourth Military Medical University, Xi'an City, China
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Xiao M, Li Q, Guo L, Luo T, Duan WX, He WX, Wang L, Chen F. AFLP analysis of genetic diversity of the endangered species Sinopodophyllum hexandrum in the Tibetan region of Sichuan Province, China. Biochem Genet 2006; 44:47-60. [PMID: 16724277 DOI: 10.1007/s10528-006-9006-5] [Citation(s) in RCA: 15] [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] [Received: 02/10/2005] [Accepted: 07/18/2005] [Indexed: 10/24/2022]
Abstract
Amplified fragment length polymorphism (AFLP) markers were used to estimate the genetic diversity of seven wild populations of Sinopodophyllum hexandrum (Royle) Ying from the Tibetan region of Sichuan Province, China. Six primer combinations generated a total of 428 discernible DNA fragments, of which 111 were polymorphic. The percentage of polymorphic bands (PPB) was 25.93 at the species level, and PPB within population ranged from 4.91 to 12.38%. Genetic diversity (H(E)) within populations varied from 0.01 to 0.04, averaging 0.05 at the species level. As revealed by the results of AMOVA analysis, 58.8% of the genetic differentiation occurred between populations, and 41.2% within populations. The genetic differentiation was, perhaps, due to the limited gene flow (Nm = 0.43) of the species. The correlation coefficient (r) between genetic and geographical distance using Mantel's test for all populations was 0.698 (P = 0.014). The UPGMA cluster analysis revealed a similar result in that the genetic distances among the populations show, to a certain extent, a spatial pattern corresponding to their geographic locations. On the basis of the genetic and ecological information, we propose some appropriate strategies for conserving the endangered S. hexandrum in this region.
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Affiliation(s)
- Meng Xiao
- College of Life Sciences, Sichuan University, Chengdu, 610064, P. R. China
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He WX, Niu ZY, Zhao SL, Chen J. [The expression and distribution of Smad 2 in human tooth germ]. Shanghai Kou Qiang Yi Xue 2001; 10:246-8. [PMID: 14994008] [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: 04/29/2023]
Abstract
OBJECTIVE To investigate the expression of Smad 2 gene in human tooth germ,and the possible function of Smad 2 during human tooth germ development. METHODS Immunohistochemical staining on prepared specimens of different stages of developing human tooth germ. RESULTS Smad 2 expression had specific temporal-spatial pattern during tooth germ development, which was similar to TGF-beta. CONCLUSION The expression of Smad 2 gene in tooth germ was detected in different stages of human tooth germ. The results suggest that Smad 2, one of the intracellular downstream molecules of TGF-beta, and as an inductive signal mediating epithelial-mesenchymal interaction, may regulate the differentiation of ameloblast and odontoblast cells, and modulate dentinogenesis and amelogenesis.
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Affiliation(s)
- W X He
- School of Stomatology, the Fourth Military Medical University, Xi'an 710032, China
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Chen HZ, Lin YS, Dai RH, He WX, Yuan JG, Li JH, Wu SM, Yang YJ. Changes in etiologic types of heart disease in Shanghai during the past 32 years. An analysis of 15,696 patients. Chin Med J (Engl) 1985; 98:151-6. [PMID: 3924504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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