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Li Y, Liu T, Li X, Yang M, Liu T, Bao J, Jiang M, Hu L, Wang Y, Shao P, Jiang J. Combined surface functionalization of MSC membrane and PDA inhibits neurotoxicity induced by Fe 3O 4 in mice based on apoptosis and autophagy through the ASK1/JNK signaling pathway. Aging (Albany NY) 2023; 15:6933-6949. [PMID: 37470690 PMCID: PMC10415563 DOI: 10.18632/aging.204884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 06/23/2023] [Indexed: 07/21/2023]
Abstract
The extensive utilization of iron oxide nanoparticles in medical and life science domains has led to a substantial rise in both occupational and public exposure to these particles. The potential toxicity of nanoparticles to living organisms, their impact on the environment, and the associated risks to human health have garnered significant attention and come to be a prominent area in contemporary research. The comprehension of the potential toxicity of nanoparticles has emerged as a crucial concern to safeguard human health and facilitate the secure advancement of nanotechnology. As nanocarriers and targeting agents, the biocompatibility of them determines the use scope and application prospects, meanwhile surface modification becomes an important measure to improve the biocompatibility. Three different types of iron oxide nanoparticles (Fe3O4, Fe3O4@PDA and MSCM-Fe3O4@PDA) were injected into mice through the tail veins. The acute neurotoxicity of them in mice was evaluated by measuring the levels of autophagy and apoptosis in the brain tissues. Our data revealed that iron oxide nanoparticles could cause nervous system damage by regulating the ASK1/JNK signaling pathway. Apoptosis and autophagy may play potential roles in this process. Exposure to combined surface functionalization of mesenchymal stem cell membrane and polydopamine showed the neuroprotective effect and may alleviate brain nervous system disorders.
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Affiliation(s)
- Yang Li
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Yibin Jilin University Research Institute, Jilin University, Yibin, Sichuan, China
| | - Xiuying Li
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Modi Yang
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Tianxin Liu
- Jilin University School of Public Health, Changchun, Jilin, China
| | - Jindian Bao
- Jilin University School of Public Health, Changchun, Jilin, China
| | - Miao Jiang
- Jilin University School of Public Health, Changchun, Jilin, China
| | - Lingling Hu
- Jilin University School of Public Health, Changchun, Jilin, China
| | - Yuzhuo Wang
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Pu Shao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Jinlan Jiang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
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Liu HY, Chi BY, Shao P, Wang FF, Fang Y, Zhang HH. [Progression of high resolution esophageal manometry in children's digestive diseases]. Zhonghua Er Ke Za Zhi 2023; 61:659-662. [PMID: 37385814 DOI: 10.3760/cma.j.cn112140-20221213-01042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Affiliation(s)
- H Y Liu
- Department of Gastroenterology, the Affiliated Children's Hospital of Xi'an Jiaotong University, National Regional Medical Center for Children (Northwest), Xi 'an 710003, China
| | - B Y Chi
- Clinical Medicine Institute of Xi'an Medical University, Xi'an 710068, China
| | - P Shao
- Department of Gastroenterology, the Affiliated Children's Hospital of Xi'an Jiaotong University, National Regional Medical Center for Children (Northwest), Xi 'an 710003, China
| | - F F Wang
- Department of Gastroenterology, the Affiliated Children's Hospital of Xi'an Jiaotong University, National Regional Medical Center for Children (Northwest), Xi 'an 710003, China
| | - Y Fang
- Department of Gastroenterology, the Affiliated Children's Hospital of Xi'an Jiaotong University, National Regional Medical Center for Children (Northwest), Xi 'an 710003, China
| | - H H Zhang
- Department of Gastroenterology, the Affiliated Children's Hospital of Xi'an Jiaotong University, National Regional Medical Center for Children (Northwest), Xi 'an 710003, China
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Shao P, Wang Y, Zhang M, Wen X, Zhang J, Xu Z, Hu M, Jiang J, Liu T. Corrigendum to "The interference of DEHP in precocious puberty of females mediated by the hypothalamic IGF-1/PI3K/Akt/mTOR signaling pathway" [Ecotoxicol. Environ. Saf. 181 (2019) 362-369]. Ecotoxicol Environ Saf 2022; 234:113355. [PMID: 35247712 DOI: 10.1016/j.ecoenv.2022.113355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- Pu Shao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yuzhuo Wang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China; Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Meng Zhang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Xinggui Wen
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Jun Zhang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Zhonghang Xu
- Gastrointestinal and Colorectal Surgery, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Min Hu
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Jinlan Jiang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China.
| | - Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China.
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Wang Y, Jiang J, Fu X, Zhang J, Song J, Wang Y, Duan L, Shao P, Xu X, Zeng L, Zhang F. Fe 3O 4@polydopamine nanoparticle-loaded human umbilical cord mesenchymal stem cells improve the cognitive function in Alzheimer's disease mice by promoting hippocampal neurogenesis. Nanomedicine 2022; 40:102507. [PMID: 34883265 DOI: 10.1016/j.nano.2021.102507] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 11/30/2022]
Abstract
One of the most promising treatments for neurodegenerative diseases is the stem cell therapy; however, there are still some limitations in the treatment of Alzheimer's disease. In this study, superparamagnetic nanoparticles composed of magnetic Fe3O4 and polydopamine shells were used to label human umbilical cord mesenchymal stem cells (hUC-MSCs) in order to increase the targeting of hUC-MSCs. Our data suggested that Fe3O4@PDA labeling increase the efficiency of hUC-MSCs entering the brain. Moreover, the water maze test showed that compared with hUC-MSCs only, Fe3O4@PDA-labeled hUC-MSCs improved the cognitive ability of APP/PS1 transgenic mice more significantly. Other experimental data showed that the expression of essential proteins in the hippocampus, such as Aβ, synaptophysin, brain-derived neurotrophic factor, are affected by Fe3O4@PDA coated-hUC-MSCs. The regulation of Fe3O4@PDA coated-hUC-MSCs could improve the memory and cognitive ability of AD mice by excessive generation of neuroprotective factors, which might be considered a viable therapy to treat AD.
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Affiliation(s)
- Yuxiang Wang
- Edmond H. Fischer Signal Transduction Laboratory, College of Life Sciences, Jilin University, Changchun, China
| | - Jinlan Jiang
- Scientific Research Centre of China-Japan Union Hospital, Jilin University, Changchun, China
| | - Xueqi Fu
- Edmond H. Fischer Signal Transduction Laboratory, College of Life Sciences, Jilin University, Changchun, China
| | - Jingtian Zhang
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun, Jilin, China
| | - Jiayue Song
- Edmond H. Fischer Signal Transduction Laboratory, College of Life Sciences, Jilin University, Changchun, China
| | - Yu Wang
- Edmond H. Fischer Signal Transduction Laboratory, College of Life Sciences, Jilin University, Changchun, China
| | - Lian Duan
- Scientific Research Centre of China-Japan Union Hospital, Jilin University, Changchun, China
| | - Pu Shao
- Scientific Research Centre of China-Japan Union Hospital, Jilin University, Changchun, China
| | - Xuemin Xu
- Department of Biology, College of Arts and Sciences, University of Texas of the Permian Basin, Odessa, TX, USA
| | - Linlin Zeng
- Edmond H. Fischer Signal Transduction Laboratory, College of Life Sciences, Jilin University, Changchun, China.
| | - Fuqiang Zhang
- Scientific Research Centre of China-Japan Union Hospital, Jilin University, Changchun, China.
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Zuo J, Tang J, Lu M, Zhou Z, Li Y, Tian H, Liu E, Gao B, Liu T, Shao P. Glycolysis Rate-Limiting Enzymes: Novel Potential Regulators of Rheumatoid Arthritis Pathogenesis. Front Immunol 2021; 12:779787. [PMID: 34899740 PMCID: PMC8651870 DOI: 10.3389/fimmu.2021.779787] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 11/02/2021] [Indexed: 01/10/2023] Open
Abstract
Rheumatoid arthritis (RA) is a classic autoimmune disease characterized by uncontrolled synovial proliferation, pannus formation, cartilage injury, and bone destruction. The specific pathogenesis of RA, a chronic inflammatory disease, remains unclear. However, both key glycolysis rate-limiting enzymes, hexokinase-II (HK-II), phosphofructokinase-1 (PFK-1), and pyruvate kinase M2 (PKM2), as well as indirect rate-limiting enzymes, 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3 (PFKFB3), are thought to participate in the pathogenesis of RA. In here, we review the latest literature on the pathogenesis of RA, introduce the pathophysiological characteristics of HK-II, PFK-1/PFKFB3, and PKM2 and their expression characteristics in this autoimmune disease, and systematically assess the association between the glycolytic rate-limiting enzymes and RA from a molecular level. Moreover, we highlight HK-II, PFK-1/PFKFB3, and PKM2 as potential targets for the clinical treatment of RA. There is great potential to develop new anti-rheumatic therapies through safe inhibition or overexpression of glycolysis rate-limiting enzymes.
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Affiliation(s)
- Jianlin Zuo
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Jinshuo Tang
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Meng Lu
- Department of Nursing, The First Bethune Hospital of Jilin University, Changchun, China
| | - Zhongsheng Zhou
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yang Li
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Hao Tian
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Enbo Liu
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Baoying Gao
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Pu Shao
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, Changchun, China
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
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Yao H, Yan J, Shao P, Wang Y, Liu T, Jiang J, Liu T. Co-modification with MSC membrane and PDA prevents Fe 3O 4-induced pulmonary toxicity in mice via AMPK-ULK1 axis. Toxicol Lett 2021; 351:145-154. [PMID: 34509610 DOI: 10.1016/j.toxlet.2021.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/31/2021] [Accepted: 09/07/2021] [Indexed: 11/30/2022]
Abstract
Fe3O4 nanoparticles are widely used in the diagnosis and treatment of diseases due to their superparamagnetism, but their toxicity in vivo, which can result in apoptosis or autophagy, cannot be ignored. It has been reported that polydopamine (PDA) modification can reduce the toxicity of Fe3O4 and increase its biocompatibility. However, more research is warranted to further improve the modification method. We therefore developed a new method to coat Fe3O4@PDA nanoparticles with the mesenchymal stem cell membrane (MSCM) and evaluated the toxicity of the modified particles in the lungs of mice. We found that the MSCM modification significantly reduced lung injury induced by Fe3O4 particles in mice. Compared with Fe3O4@PDA nanoparticles, co-modification with MSCM and PDA significantly reduced autophagy and apoptosis in mouse lung tissue, and reduced activation of autophagy mediated by the AMPK-ULK1 pathway axis. Thus, co-modification with MSCM and PDA prevents Fe3O4-induced pulmonary toxicity in mice by inhibiting autophagy, apoptosis, and oxidative stress.
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Affiliation(s)
- Hua Yao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Jun Yan
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Pu Shao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China; Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yuzhuo Wang
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Tianxin Liu
- School of Public Health, Jilin University, Changchun, China
| | - Jinlan Jiang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China.
| | - Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China.
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Tang J, Shao P, Liu T, Wen X, Wang Y, Wang C, Peng Y, Yao H, Zuo J. Osteomyelitis variolosa, an issue inherited from the past: case report and systematic review. Orphanet J Rare Dis 2021; 16:354. [PMID: 34362412 PMCID: PMC8344329 DOI: 10.1186/s13023-021-01985-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 07/27/2021] [Indexed: 11/18/2022] Open
Abstract
Background Osteomyelitis variolosa is a self-limiting disease triggered by variola virus that cannot be prevented or repaired. Smallpox has been eradicated for 40 years, and complications that remain after smallpox has been cured have become a remarkable diagnostic challenge for contemporary physicians. In this systematic review, we searched PubMed (MEDLINE), Web of Science, and Google Scholar for cases on complications, diagnosis, and treatment for osteomyelitis variolosa between January 1980 and February 2021. Results Ten papers and eleven finished cases, all patients from India, were included for comparison with the present case. In total, 100% of patients presented with bilateral elbow deformities, the ankle was the second most common site of lesion in 50%, and knee lesions accounted for 25% in this study. Flexion contracture, joint instability, secondary arthritis, and fracture are common complications of osteomyelitis variolosa, and most patients receive conservative treatment, while internal fixation has good results for combined fractures. Conclusions Although osteomyelitis variolosa is not a direct threat to the safety of patients, severe skeletal deformities can have a significant impact on quality of life. With advances in surgical techniques, clinicians are offering an increasing number of treatment options for patients with osteomyelitis variolosa. However, most importantly, smallpox has basically been removed from the historical arena, and for areas where smallpox was once endemic, physicians need to deepen the understanding of this disease again.
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Affiliation(s)
- Jinshuo Tang
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin, China
| | - Pu Shao
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin, China.,Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, Jilin, China
| | - Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, Jilin, China
| | - Xinggui Wen
- Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun, 130033, Jilin, China
| | - Yeliang Wang
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin, China
| | - Chenyu Wang
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin, China
| | - Yachen Peng
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin, China
| | - Hua Yao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, Jilin, China
| | - Jianlin Zuo
- Department of Orthopeadics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin, China.
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Shao P, Wang LL, Pi Z, Wang YX, Liu YF. [Malignant peritoneal mesothelioma in a child]. Zhonghua Er Ke Za Zhi 2021; 59:600-601. [PMID: 34405644 DOI: 10.3760/cma.j.cn112140-20210222-00149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- P Shao
- Department of Pediatric Gastroenterology, First Hospital of Jilin University, Changchun 130021, China
| | - L L Wang
- Department of Pediatric Gastroenterology, First Hospital of Jilin University, Changchun 130021, China
| | - Z Pi
- Department of Pediatric Gastroenterology, First Hospital of Jilin University, Changchun 130021, China
| | - Y X Wang
- Department of Pediatric Gastroenterology, First Hospital of Jilin University, Changchun 130021, China
| | - Y F Liu
- Department of Pediatric Gastroenterology, First Hospital of Jilin University, Changchun 130021, China
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Wen J, Shao P, Chen Y, Wang L, Lv X, Yang W, Jia Y, Jiang Z, Zhu B, Qu L. Genomic scan revealed KIT gene underlying white/gray plumage color in Chinese domestic geese. Anim Genet 2021; 52:356-360. [PMID: 33644907 DOI: 10.1111/age.13050] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2021] [Indexed: 01/17/2023]
Abstract
Goose is an important type of domesticated poultry. The wild geese that are regarded as the ancestors of modern domestic geese present gray plumage. Domesticated, geese have both white and gray feathers. To elucidate the genetic mechanisms underlying the formation of white and gray plumage in geese, we resequenced the whole genome of 18 geese from six populations including white and gray goose breeds. The average sequencing depth per individual was 9.81× and the average genome coverage was 96.8%. A total of 346 genes were detected in the top 1% of FST scores of gray- and white-feathered geese, and a significant FST site was located in the intron region within the KIT gene, the 18 bp deletion in KIT having the strongest potential association with white feathers. It has been reported that a number of genes are associated with plumage colors in birds. However, no studies have identified the relationship between KIT and plumage color in birds at present, although the white coat can be attributed to mutations in KIT in some mammals. Our study showed that that KIT is a plausible candidate gene for white/gray plumage color in Chinese domestic geese.
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Affiliation(s)
- J Wen
- State Key Laboratory of Animal Nutrition, Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, 100094, China
| | - P Shao
- State Key Laboratory of Animal Nutrition, Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, 100094, China
| | - Y Chen
- Beijing Animal Husbandry and Veterinary Station, Beijing, 100107, China
| | - L Wang
- Beijing Animal Husbandry and Veterinary Station, Beijing, 100107, China
| | - X Lv
- Beijing Animal Husbandry and Veterinary Station, Beijing, 100107, China
| | - W Yang
- Beijing Animal Husbandry and Veterinary Station, Beijing, 100107, China
| | - Y Jia
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Z Jiang
- Department of Animal Sciences, Washington State University, Pullman, WA, 99164, USA
| | - B Zhu
- Zhuozhou Animal Health Supervision Station, Hebei, 072750, China
| | - L Qu
- State Key Laboratory of Animal Nutrition, Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, 100094, China
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Gai B, Li Q, Shao P, Yang D. Advantages of interstitial radioactive seed implantation for the treatment of Stage III pancreatic cancer. J Cancer Res Ther 2021; 17:702-706. [PMID: 34269302 DOI: 10.4103/jcrt.jcrt_803_20] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objective The objective of the study was to identify the advantages of interstitial radioactive seed implantation for the treatment of Stage III pancreatic cancer. Materials and Methods Clinical data of 160 patients with pancreatic cancer implanted with radioactive seeds were retrospectively analyzed. Patients were grouped according to tumor size, lymph node metastasis, and tumor invasion to important blood vessels, and survival time statistics were obtained. Results The mean postoperative survival time (months) was 24.80 for Stage I, 12.89 for Stage II, 13.51 for Stage III, and 7.49 for Stage IV patients, and the difference between Stage II and Stage III patients was not statistically significant. The efficacy of radioactive seed implantation therapy for pancreatic cancer was strongly associated with tumor size and number of lymph node metastases but not significantly associated with tumor invasion to blood vessels. Conclusions Radioactive seed implantation obviously advantageous for the treatment of Stage III pancreatic cancer.
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Affiliation(s)
- Baodong Gai
- Department of Gastrointestinal Surgical, Third Hospital of Jilin University, Changchun, China
| | - Qingchun Li
- Department of Gastrointestinal Surgical, Third Hospital of Jilin University, Changchun, China
| | - Pu Shao
- Department of Gastrointestinal Surgical, Third Hospital of Jilin University, Changchun, China
| | - Dongyan Yang
- Department of Ultrasound, Third Hospital of Jilin University, Changchun, China
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Zhang M, Zhang F, Liu T, Shao P, Duan L, Yan J, Mu X, Jiang J. Polydopamine Nanoparticles Camouflaged by Stem Cell Membranes for Synergistic Chemo-Photothermal Therapy of Malignant Bone Tumors. Int J Nanomedicine 2020; 15:10183-10197. [PMID: 33363374 PMCID: PMC7754090 DOI: 10.2147/ijn.s282931] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [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: 09/19/2020] [Accepted: 11/20/2020] [Indexed: 12/23/2022] Open
Abstract
Purpose Nanoparticle (NP)-based chemo-photothermal therapy (CPT) has been shown to be a promising non-invasive approach for antitumor treatment. However, NPs must overcome the limitations of opsonization, clearance of the reticuloendothelial system, and ineffective targeting of tumor tissue sites. To solve these problems, stem cell membrane (SCM)-camouflaged polydopamine nanoparticles (PDA@SCM NPs) carrying the hydrophobic anticancer drug 7-ethyl-10-hydroxycamptothecin (SN38) were constructed for CPT of malignant bone tumors. Methods We developed umbilical-cord mesenchymal stem cell membrane-coated polydopamine nanoparticles encapsulating SN38 (PDA-SN38@SCM NPs) as an efficient tumor-targeting drug-delivery platform for CPT of malignant bone tumors. We characterized PDA@SCM NPs and evaluated the biocompatibility and anti-phagocytosis properties of PDA@SCM NPs. The antitumor activity of PDA-SN38@SCM NPs was evaluated in MG63 lines and an MG63 xenograft model in mice. Results Synthesized PDA-SN38@SCM NPs retained an excellent photothermal effect after SN38 loading. The drug release of PDA-SN38@SCM NPs could be triggered by near-infrared irradiation and an acidic stimulus. PDA@SCM NPs exhibited lower nonspecific macrophage uptake, longer retention in blood, and more effective accumulation at tumor sites than that shown by PDA NPs. Confocal laser scanning microscopy (CLSM) and flow cytometry showed that MG63 cells took up more PDA-SN38@SCM NPs than PDA-SN38 NPs. In vitro and in vivo antitumor studies demonstrated the outstanding performance of PDA-SN38@SCM NPs in synergistic CPT for bone tumors. Conclusion PDA-SN38@SCM NPs demonstrated an extraordinary synergistic CPT effect and could be a promising strategy for the treatment of malignant bone tumors.
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Affiliation(s)
- Meng Zhang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Fuqiang Zhang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Pu Shao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Lian Duan
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Jun Yan
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Xupeng Mu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Jinlan Jiang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
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Leng J, Li W, Wang L, Zhang S, Liu H, Li W, Wang S, Shao P, Pan L, Wang S, Liu E. Higher thyroid-stimulating hormone levels in the first trimester are associated with gestational diabetes in a Chinese population. Diabet Med 2019; 36:1679-1685. [PMID: 31407386 DOI: 10.1111/dme.14106] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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] [Accepted: 08/10/2019] [Indexed: 01/11/2023]
Abstract
AIM To evaluate the relationship between maternal thyroid-stimulating hormone levels during the first trimester and gestational diabetes risk. METHODS In Tianjin, China, 7258 women underwent a thyroid-stimulating hormone screening test within 12 gestational weeks and then had a glucose challenge test at 24-28 weeks of gestational age. The women with a glucose challenge test ≥7.8 mmol/l underwent a 75 g oral glucose tolerance test. Gestational diabetes was diagnosed following International Association of Diabetes and Pregnancy Study Group criteria. Restricted cubic spline analysis was performed to explore full-range risk associations of thyroid-stimulating hormone levels with gestational diabetes. Logistic regression was performed to obtain odds ratios and 95% confidence intervals. RESULTS In all, 594 women (8.2%) had gestational diabetes. Among women with thyroid-stimulating hormone ≤3.2 mIU/l, a positive association between thyroid-stimulating hormone levels and gestational diabetes risk was found (adjusted OR: 1.13, 95% CI: 1.00-1.27). There was no relationship between thyroid-stimulating hormone levels and gestational diabetes risk in univariable and multivariable analyses among women with thyroid-stimulating hormone >3.2 mIU/l. In subgroup analyses, among women with thyroid-stimulating hormone ≤3.2 mIU/l and BMI ≥25 kg/m2 , the adjusted odds ratio for thyroid-stimulating hormone levels with gestational diabetes was enhanced to 1.25 (95% CI: 1.02-1.53). CONCLUSIONS In pregnant Chinese women, thyroid-stimulating hormone levels even within normal range in the first trimester were positively related to gestational diabetes risk, especially for pre-pregnancy overweight/obese women.
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Affiliation(s)
- J Leng
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - W Li
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - L Wang
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - S Zhang
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - H Liu
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - W Li
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - S Wang
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - P Shao
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - L Pan
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - S Wang
- Tianjin Women and Children's Health Centre, Tianjin, China
| | - E Liu
- Tianjin Women and Children's Health Centre, Tianjin, China
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Wang Y, Li Y, Shao P, Wang L, Bao X, Hu M. IL1β inhibits differentiation of cementoblasts via microRNA‐325‐3p. J Cell Biochem 2019; 121:2606-2617. [DOI: 10.1002/jcb.29482] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 10/08/2019] [Indexed: 01/17/2023]
Affiliation(s)
- Yuzhuo Wang
- Department of Orthodontics, School of Stomatology Jilin University Changchun China
| | - Ying Li
- Department of Orthodontics, School of Stomatology Jilin University Changchun China
| | - Pu Shao
- Department of Orthopedics China‐Japan Union Hospital of Jilin University Changchun China
| | - Liuyi Wang
- Department of Orthodontics, School of Stomatology Jilin University Changchun China
| | - Xingfu Bao
- Department of Orthodontics, School of Stomatology Jilin University Changchun China
| | - Min Hu
- Department of Orthodontics, School of Stomatology Jilin University Changchun China
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Shao P, Wang Y, Zhang M, Wen X, Zhang J, Xu Z, Hu M, Jiang J, Liu T. The interference of DEHP in precocious puberty of females mediated by the hypothalamic IGF-1/PI3K/Akt/mTOR signaling pathway. Ecotoxicol Environ Saf 2019; 181:362-369. [PMID: 31212184 DOI: 10.1016/j.ecoenv.2019.06.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/29/2019] [Accepted: 06/05/2019] [Indexed: 06/09/2023]
Abstract
DEHP is reported to cause precocious puberty of females in both humans and rodents, but the underlying mechanisms were largely unknown. This study was designed to clarify the effects and the mechanisms of DEHP on the pathogenesis of sexual precocity. Prepubertal female rats were treated with DEHP for 4 weeks. Key organs were analyzed in control conditions and after exposure to 0.2, 1, and 5 mg/kg/day DEHP in pubertal female rats. To determine the role of the IGF-1/PI3K/Akt/mTOR signaling pathway in DEHP-induced female precocious puberty, 36 rats were treated with 5 mg/kg/day DEHP to establish a model of female precocious puberty. And we investigated the expression of genes and proteins related to IGF-1 pathway in rat hypothalamus after treatment with inhibitors. In the present study, we observed that DEHP treatment resulted in earlier vaginal opening time, higher number of Nissl bodies in the hypothalamus neurons, lower apoptosis of hypothalamic cells, higher IGF-1 and GnRH levels in the serum and hypothalamus. DEHP could also upregulated the expression of IGF-1/PI3K/Akt/mTOR pathway and GnRH in the hypothalamus of adolescent female rats, and inhibition of IGF-1R and mTOR in hypothalamus could block the activation of Kiss-1, GPR54, and GnRH by DEHP. In summary, our study suggested that DEHP might activate the hypothalamic GnRH neurons prematurely through the IGF-1 signaling pathway and promote GnRH release, leading to the initiation of female sexual development. Our results provide a new molecular mechanism underlying reproductive and developmental toxicity in pubertal female rats induced by DEHP.
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Affiliation(s)
- Pu Shao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yuzhuo Wang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China; Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Meng Zhang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Xinggui Wen
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Jun Zhang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Zhonghang Xu
- Gastrointestinal and Colorectal Surgery, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Min Hu
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Jinlan Jiang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China.
| | - Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China.
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Shao P, Li Z, Yang M, Wang Y, Liu T, Yang Y, Duan L, Jiang J, Zuo J. Impact of acetabular reaming depth on reconstruction of rotation center in primary total hip arthroplasty. BMC Musculoskelet Disord 2018; 19:425. [PMID: 30497444 PMCID: PMC6267806 DOI: 10.1186/s12891-018-2336-8] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 11/07/2018] [Indexed: 11/10/2022] Open
Abstract
PURPOSE To study the impact of acetabular reaming depth on reconstruction of rotation center (RC) in unilateral primary total hip arthroplasty (UPTHA) and guide individualized preoperative design. METHODS 200 postoperative standard bilateral hip anteroposterior radiographs after UPTHA were included, which were collected from January, 2013 to June, 2017 in our hospital. Osteonecrosis of femoral head was the only diagnosis in this cohort. The parameters were measured on the anteropoterior radiographs by using RadiAnt DICOM viewer. RESULTS The average of the thickness of the teardrop is about 6.13 ± 1.42 mm. The parameter a (the difference value of the distance of bilateral RC and midline) was positively correlated with the parameter e (the acetabular reaming depth), and the Pearson correlation coefficient was 0.49 when P = 0.05. Furthermore, the value of parameter (e) was 8.25 mm when a2 (the distance from the center of the prosthesis femoral head to the vertical line across the midpoint of pubic symphysis) equaled a1 (the distance from RC of the healthy femoral head to the vertical line across the midpoint of pubic symphysis). CONCLUSIONS The reaming depth of the acetabulum could influence the reconstruction of RC during UPTHA. When the medial margin of the cup was placed about 2 mm to the lateral border of the ipsilateral teardrop (the bottom of the ovum), the rotation center would be accurately restored.
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Affiliation(s)
- Pu Shao
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China
| | - Zhizhou Li
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China
| | - Modi Yang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China
| | - Yuzhuo Wang
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, 130021, People's Republic of China
| | - Te Liu
- Scientific Research Centre of China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China
| | - Yuhui Yang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China
| | - Lian Duan
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China
| | - Jinlan Jiang
- Scientific Research Centre of China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China.
| | - Jianlin Zuo
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 xiantai street, Changchun, 130033, People's Republic of China.
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Liu T, Wang Y, Yang M, Shao P, Duan L, Li M, Zhu M, Yang J, Jiang J. Di-(2-ethylhexyl) phthalate induces precocious puberty in adolescent female rats. Iran J Basic Med Sci 2018; 21:848-855. [PMID: 30186573 PMCID: PMC6118085 DOI: 10.22038/ijbms.2018.28489.6905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 03/08/2018] [Indexed: 12/23/2022]
Abstract
OBJECTIVES Nowadays, Di-(2-ethylhexyl) phthalate (DEHP) is widely used in different kinds of commercial products as a plasticizer. Previous studies have revealed that exposures to DEHP could be associated with precocious puberty in teenagers, but the exact mechanism is yet to be known. MATERIALS AND METHODS In this study, 48 prepubertal Wistar female rats were randomly apportioned into 4 groups and orally treated with 0, 250, 500, and 1000 mg/kg/d DEHP from postnatal day 21 up to 4 weeks. Subsequently, we examined the indicators related to the initiation of sexual development. RESULTS DEHP was able to shorten the vaginal opening time and prolong the estrous cycles of female rats. IGF-1 expression was significantly upregulated by 1000 mg/kg/d DEHP in the hypothalamus, and the hypothalamic, as well as serum levels of GH, were also upregulated by DEHP. It also caused decrements in serum levels of FSH, LH, and T and the increment in level of progesterone. Meanwhile, DEHP was able to exert its effect on the mRNA and protein expression levels of Kiss-1, GPR54, and GnRH in the hypothalamus in pubertal female rats. CONCLUSION These findings are revealing that DEHP exposure more likely causes imbalances of hypothalamus functioning in pubertal female rats and thus induces precautious puberty in these animals.
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Affiliation(s)
- Te Liu
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Yuzhuo Wang
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, 130021, China
| | - Modi Yang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Pu Shao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Lian Duan
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Meng Li
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Mingji Zhu
- Department of Dermatological, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Jie Yang
- Department of Endocrinology, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Jinlan Jiang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
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Li N, Shao P, Liu T, Zhang M. Effects of Di-(2-ethylhexyl) phthalate on thyroid in pubertal female rats and related mechanism. ASIAN PAC J TROP MED 2018. [DOI: 10.4103/1995-7645.243113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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18
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Zhou YL, Du YF, Du H, Shao P. Insulin resistance in Alzheimer's disease (AD) mouse intestinal macrophages is mediated by activation of JNK. Eur Rev Med Pharmacol Sci 2017; 21:1787-1794. [PMID: 28485801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE Alzheimer's disease (AD) has been considered as a metabolic disorder disease, which closely related to insulin signaling impairment. Therefore, identifying the potential mechanism of insulin resistance is important for AD treatment. MATERIALS AND METHODS An APP/PS1 double transgenic AD mouse model was introduced to study insulin resistance in gut. The expressions of AD markers and key elements of insulin signaling were detected in ileum and intestinal macrophages of AD mice by immunohistochemistry. Furthermore, mouse intestinal macrophage cell line RAW264.7 was treated by Aβ25-35 or Aβ25-35 + insulin to explore the mechanism of insulin resistance in vitro. The expression of IR-β and the activation of cell signaling related proteins (Insulin receptor substrate 1 (IRS1), protein kinase B (AKT) and c-Jun N-terminal kinase (JNK)) in Aβ25-35-stimulated macrophages were performed via Western blotting. RESULTS The expressions of IRS1, Aβ and Tuj in AD mice ileum were significantly different from WT mice (p<0.05). Also, there were significant discrepancies in the expressions of β2AR and eNOS in intestinal macrophages of two groups (p<0.05). After exposure to Aβ25-35, cell proliferation rate (p<0.01) of macrophage and the levels of TNF-α (p<0.01) and Il-6 (p<0.01) was significant elevated and treatment with insulin could reverse these changes (p<0.05). The amount of IR-β and the p-AKT/AKT ratio significantly decreased in Aβ25-35-treated macrophages (p<0.01), while the ratios of p-IRS1/IRS1 and p-JNK/JNK significantly enlarged (p<0.01). Furthermore, all the changes caused by Aβ25-35 treatment were attenuated by insulin addition. CONCLUSIONS Activation of JNK pathway played an important role in insulin resistance of AD mice, suggesting that inhibition of JNK pathway might be a new strategy toward resolving insulin resistance related diseases, such as AD.
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Affiliation(s)
- Y-L Zhou
- Department of Neurology, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China.
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Shao P, Xu ZR, Zhao LX, Zhao ZH. [Effect of inserted angle on the stability of loaded microscrews]. Zhonghua Kou Qiang Yi Xue Za Zhi 2017; 52:39-43. [PMID: 28072993 DOI: 10.3760/cma.j.issn.1002-0098.2017.01.008] [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: 06/06/2023]
Abstract
Objective: To evaluate the effect of different insertion angles on the osseointegration of loaded microscrews in beagle jaws. Methods: Forty-eight microscrews were inserted at four different angles (30°, 50°, 70° and 90°) into the interradicular zones between the mandibular first molar and third premolar in twelve beagles and the microscrews had been loaded with a force of 2 N immediately for 8 weeks. After microscrew-bone specimens fixed, the maximum output value (Fmax) of pull-out test was recorded and the histomorphological changes of hard tissue were observed. The bone-implant contact (BIC%) was quantitatively analyzed and the osseointegration of microscrew-bone interface was comprehensively evaluated. Results: Both Fmax and BIC% values of microscrews were influenced by the insertion angles. The maximum value of Fmax was (385±23) N in the group with 50° angle, and the minimum value was (198±16) N in the group with 30° angle(P <0.05). The maximum value of BIC% was (59.1±6.0)% in the group with 70° angle, and the minimum value was (30.2±3.2)% in the group with 30° angle (P <0.05). Histomorphology observation revealed that in peri-screws region, the various degree of bone remodeling was found in different angle samples. Conclusions: The insertion angles (50°and 70°) were favorable to the stability of the microscrew.
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Affiliation(s)
- P Shao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China (Present address: Department of Stomatology, 363 Hospital of China Aviation Industry, Chengdu 610041, China)
| | - Z R Xu
- Department of Orthodontics, Jinqin International Dental Clinic-Shuangnan Branch, Chengdu 610041, China
| | - L X Zhao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Z H Zhao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
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Wu RR, Zhang FY, Gao KM, Ou JJ, Shao P, Jin H, Guo WB, Chan PK, Zhao JP. Metformin treatment of antipsychotic-induced dyslipidemia: an analysis of two randomized, placebo-controlled trials. Mol Psychiatry 2016; 21:1537-1544. [PMID: 26809842 PMCID: PMC5078852 DOI: 10.1038/mp.2015.221] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 11/10/2015] [Accepted: 12/02/2015] [Indexed: 01/24/2023]
Abstract
Dyslipidemia is one of the most common adverse effects in schizophrenia patients treated with antipsychotics. However, there are no established effective treatments. In this study, data were pooled from two randomized, placebo-controlled trials, which were originally designed to examine the efficacy of metformin in treating antipsychotic-induced weight gain and other metabolic abnormalities. In total, 201 schizophrenia patients with dyslipidemia after being treated with an antipsychotic were assigned to take 1000 mg day-1 metformin (n=103) or placebo (n=98) for 24 weeks, with evaluation at baseline, week 12 and week 24. The primary outcome was the low-density lipoprotein cholesterol (LDL-C) levels. After metformin treatment, the mean difference in the LDL-C value between metformin treatment and placebo was from 0.16 mmol l-1 at baseline to -0.86 mmol l-1 at the end of week 24, decreased by 1.02 mmol l-1 (P<0.0001); and 25.3% of patients in the metformin group had LDL-C ≥3.37 mmol l-1, which is significantly <64.8% in the placebo group (P<0.001) at week 24. Compared with the placebo, metformin treatment also have a significant effect on reducing weight, body mass index, insulin, insulin resistance index, total cholesterol and triglyceride, and increasing high-density lipoprotein cholesterol. The treatment effects on weight and insulin resistance appeared at week 12 and further improved at week 24, but the effects on improving dyslipidemia only significantly occurred at the end of week 24. We found that metformin treatment was effective in improving antipsychotic-induced dyslipidemia and insulin resistance, and the effects improving antipsychotic-induced insulin resistance appeared earlier than the reducing dyslipidemia.
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Affiliation(s)
- R-R Wu
- Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, Hunan, China,Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, 139# Middle Renmin Road, Changsha, Hunan 410011, China. E-mail: or
| | - F-Y Zhang
- Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, Hunan, China,Division of Clinical Sciences, Lieber Institute for Brain Development, Baltimore, MD, USA
| | - K-M Gao
- Department Psychiatry at Case Western Reserve/University Hospital Case Medical Center, Cleveland, OH, USA
| | - J-J Ou
- Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, Hunan, China
| | - P Shao
- Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, Hunan, China
| | - H Jin
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
| | - W-B Guo
- Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, Hunan, China
| | - P K Chan
- Department Psychiatry at Case Western Reserve/University Hospital Case Medical Center, Cleveland, OH, USA
| | - J-P Zhao
- Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, Hunan, China,Mental Health Institute of the Second Xiangya Hospital, National Technology Institute of Psychiatry, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, 139# Middle Renmin Road, Changsha, Hunan 410011, China. E-mail: or
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Wang J, Jia L, Wei W, Lang S, Shao P, Fan X. Determination of polycyclic aromatic hydrocarbons in edible oil by gel permeation chromatography and ultra-high performance liquid chromatography coupled with diode array detector and fluorescence detector. ACTA CHROMATOGR 2016. [DOI: 10.1556/1326.2016.28.3.11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shao P, Zhang JF, Chen XX, Sun PL. Microwave-assisted extraction and purification of chlorogenic acid from by-products of Eucommia Ulmoides Oliver and its potential anti-tumor activity. J Food Sci Technol 2015; 52:4925-34. [PMID: 26243912 PMCID: PMC4519487 DOI: 10.1007/s13197-014-1571-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/26/2014] [Accepted: 09/16/2014] [Indexed: 10/24/2022]
Abstract
An efficient method for the rapid extraction, separation and purification of chlorogenic acid (CGA) from by-products of Eucommia Ulmoides Oliver (E. ulmoides) by microwave-assisted extraction (MAE) coupled with high-speed counter-current chromatography (HSCCC) was developed. The optimal MAE parameters were evaluated by response surface methodology (RSM), and they were extraction time of 12 min, microwave power of 420 W, ethanol concentration of 75 %, solvent/sample ratio of 30:1 (mL/g), yield of CGA reached 3.59 %. The crude extract was separated and purified directly by HSCCC using ethyl acetate-butyl alcohol-water (3:1:4, v/v) as the two-phase solvent system. The 14.5 mg of CGA with the purity of 98.7 % was obtained in one-step separation from 400 mg of crude extract. The chemical structure of CGA was verified with IR, ESI-MS analysis. Meanwhile, the purified CGA extract was evaluated by MTT assay and results indicate that CGA extract exhibited potential anti-tumor activity for AGS gastric cancer cell.
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Affiliation(s)
- P. Shao
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014 China
| | - J. F. Zhang
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014 China
| | - X. X. Chen
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014 China
| | - P. L Sun
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014 China
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Dai SQ, Yu LP, Shi X, Wu H, Shao P, Yin GY, Wei YZ. Serotonin regulates osteoblast proliferation and function in vitro. ACTA ACUST UNITED AC 2014; 47:759-65. [PMID: 25098615 PMCID: PMC4143203 DOI: 10.1590/1414-431x20143565] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 05/22/2014] [Indexed: 11/22/2022]
Abstract
The monoamine serotonin (5-hydroxytryptamine, 5-HT), a well-known neurotransmitter,
also has important functions outside the central nervous system. The objective of
this study was to investigate the role of 5-HT in the proliferation, differentiation,
and function of osteoblasts in vitro. We treated rat primary
calvarial osteoblasts with various concentrations of 5-HT (1 nM to 10 µM) and
assessed the rate of osteoblast proliferation, expression levels of
osteoblast-specific proteins and genes, and the ability to form mineralized nodules.
Next, we detected which 5-HT receptor subtypes were expressed in rat osteoblasts at
different stages of osteoblast differentiation. We found that 5-HT could inhibit
osteoblast proliferation, differentiation, and mineralization at low concentrations,
but this inhibitory effect was mitigated at relatively high concentrations. Six of
the 5-HT receptor subtypes (5-HT1A, 5-HT1B, 5-HT1D,
5-HT2A, 5-HT2B, and 5-HT2C) were found to exist
in rat osteoblasts. Of these, 5-HT2A and 5-HT1B receptors had
the highest expression levels, at both early and late stages of differentiation. Our
results indicated that 5-HT can regulate osteoblast proliferation and function
in vitro.
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Affiliation(s)
- S Q Dai
- Department of Orthopedic Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - L P Yu
- Department of Orthopedic Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - X Shi
- Department of Obstetrics and Gynecology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - H Wu
- Emergency Department, The First Affiliated Hospital, Soochow University, Suzhou, China
| | - P Shao
- Department of Orthopedic Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - G Y Yin
- Department of Orthopedic Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Y Z Wei
- Department of Orthopedic Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
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Tao L, Chen J, Zhou H, Qin C, Li P, Cao Q, Li J, Ju X, Zhu C, Wang M, Zhang Z, Shao P, Yin C. A functional polymorphism in the CYR61 (IGFBP10) gene is associated with prostate cancer risk. Prostate Cancer Prostatic Dis 2012; 16:95-100. [PMID: 23045290 DOI: 10.1038/pcan.2012.41] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND CYR61 (cysteine-rich protein 61, also named IGFBP10) is a secreted signaling molecule that promotes angiogenesis and tumor growth. The goal of this study is to determine whether a functional polymorphism in the promoter region of the CYR61 gene (rs3753793) is associated with prostate cancer (PCa) risk and gene expression in Chinese patients. METHODS A total of 665 patients diagnosed with PCa and 703 cancer-free controls were genotyped in this hospital-based case-control study, and 26 PCa tissue samples were evaluated for mRNA expression of CYR61 by real-time quantitative reverse-transcription PCR. RESULTS Men carrying the G allele of rs3753793 (TG+GG) had significantly lower risk of PCa when compared with the TT genotype (odds ratio (OR) = 0.76, 95% confidence interval (CI) = 0.61-0.95). The association was generally more pronounced among subgroups of PCa patients with advanced stage (OR = 0.70, 95% CI = 0.53-0.94), Gleason score >7 (OR = 0.63, 95% CI = 0.46-0.86) and PSA>20 ng ml(-1) (OR = 0.68, 95% CI = 0.53-0.88). Prostate tumors derived from cases with the GT/GG genotypes had significantly lower levels of CYR61 mRNA when compared with cases with the TT genotypes (P = 0.02). CONCLUSIONS Our results indicate that the genetic variation of rs3753793 in the CYR61 promoter may contribute to genetic predisposition to PCa and intra-tumor expression gene expression.
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Affiliation(s)
- L Tao
- State Key Laboratory of Reproductive Medicine, Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Shao P, Qin C, Meng X, Li J, Ju X, Li P, Yin C. Hybrid Laparoscopic Technique for Renal Artery Takayasu Arteritis. Eur J Vasc Endovasc Surg 2011; 42:803-8. [DOI: 10.1016/j.ejvs.2011.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 09/08/2011] [Indexed: 10/16/2022]
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26
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Chi Z, Zhang W, Liu D, Ma Z, Cao Y, Shao P, Han C. SU-FF-T-193: An Investigation of the Accuracy of Esophageal IMRT Dose Distribution Using Three-Dimensional Dosimetry Techniques and Monte Carlo Simulation. Med Phys 2009. [DOI: 10.1118/1.3181668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Shao P, Jiang S, Ying Y. Optimization of Molecular Distillation for Recovery of Tocopherol from Rapeseed Oil Deodorizer Distillate Using Response Surface and Artificial Neural Network Models. Food and Bioproducts Processing 2007. [DOI: 10.1205/fbp06048] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shao P, Huang R. On the profile of gas pressure drops in the bore of hollow fiber membranes: A reply to the comment by T.S.Y. Choong in J. Membr. Sci. 280 (2006) 990. J Memb Sci 2007. [DOI: 10.1016/j.memsci.2006.10.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Circadian rhythmicity is an essential feature of bone metabolism. The present study was undertaken to (Aoshima et al., 1998) determine the changes in bone resorption and formation in rats over 24h, (Black et al., 1999) evaluate the effect of the consecutive administration of etidronate on circadian rhythms of serum bone markers, and (Blumsohn et al., 1994) determine whether the effect of etidronate on bone metabolism is circadian time-dependent. One hundred twenty male Wistar rats, which had been adapted to a 12/12h light/dark cycle, were injected subcutaneously once daily with either 0.5 mgP/kg etidronate or 0.9% NaCl (control group) at 0090, 1300, 1700, 2100, 0100, or 0500h for 10d. Serum was collected and tibiae were dissected 24h after the last injection. Serum pyridinoline (Pyd), tartrate-resistant acid phosphatase (TRAP), osteocalcin (OC), alkaline phosphatase (ALP), calcium (Ca), phosphorus (Pi), calcitonin (CT), and parathyroid hormone (PTH) were determined. Bone mineral density (BMD) in the proximal tibia, and the rate of formation of longitudinal trabecular bone over the past 48h were also determined using a chronological labeling method with NTA-Pb. The results showed characteristic circadian rhythms in serum bone markers in rats, with peaks in both bone resorption and bone formation during the animals' rest span. The administration of etidronate at the different times of the day decreased the level of bone-resorption markers (Pyd and TRAP) without affecting the circadian patterns of markers of bone formation (OC and ALP). However, the magnitude of the decrease due to etidronate was not uniform throughout the day, and was greatest during the daytime. Etidronate increased the BMD in the tibial metaphysis in all of the time-treatment groups, but the magnitude of the increase did not vary with the time of etidronate administration. The present data provide a physiological basis for future studies on bone metabolism and may be important in the design of future experiments and in the interpretation of experimental data.
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Affiliation(s)
- P Shao
- Division of Pharmacology, Department of Oral Biology, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
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Wang X, Xu K, Niu W, Shao P. [High-frequency ventilation in the treatment of sleep apnea syndrome in diabetes mellitus]. Zhonghua Yi Xue Za Zhi 2001; 81:565-6. [PMID: 16432963] [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: 05/06/2023]
Affiliation(s)
- X Wang
- Center for Sleep study, Yinchuan City First Hospital, Ningxia 750001, China
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Zhang H, Feng J, Zhu W, Liu C, Xu S, Shao P, Wu D, Yang W, Gu J. Chronic toxicity of rare-earth elements on human beings: implications of blood biochemical indices in REE-high regions, South Jiangxi. Biol Trace Elem Res 2000; 73:1-17. [PMID: 10949964 DOI: 10.1385/bter:73:1:1] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.5] [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] [Received: 03/05/1999] [Accepted: 05/10/1999] [Indexed: 11/11/2022]
Abstract
Blood analyses for rare-earth element (REE)-high background regions in South Jiangxi show that the population averages of many of the biochemical indices deviate markedly from normal values in the normal region. These deviations are thought to be caused by prolonged intake of REE through food chains in view of that the toxicity of other harmful metals such as Pb and Cd can be neglected because of their insignificant amounts in the environment. In comparison with the normal region, blood biochemical indices abnormal in the REE-high regions are manifested as low total serum protein (TSP), albumin, beta-globulin, glutamic pyruvic transitanase, serium triglycerides, and immunoglobulin, but high cholesterol. These deviations may be related to the REE concentration and composition of food chains, and are sex dependent. Certain blood indices (such as TSP) of different age groups in the LREE-high region indicate that the influence of REE on males is a one-way irreversible process, whereas females show a strong ability of restoration.
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Affiliation(s)
- H Zhang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, People's Republic of China
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Zhu W, Xu S, Shao P, Zhang H, Wu D, Yang W, Feng J. Bioelectrical activity of the central nervous system among populations in a rare earth element area. Biol Trace Elem Res 1997; 57:71-7. [PMID: 9258470 DOI: 10.1007/bf02803871] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [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: 02/05/2023]
Abstract
Auditory brainstem electric response (ABR) and somatosensory evoked potential (SEP) of 21 subjects (41 ears) among villagers in a rare earth element (REE) area in Gan County, Jiangxi, China, were studied. No difference in ABR between the subjects from the REE area and the control group was noted. However, the conduction detected by SEP from the median nerve to the thalamus (P15) was shortened (P < 0.05), especially to the first-grade primary somatosensory responsive region (S1) (P < 0.01) and the amplitude of S1 decreased (P < 0.05), indicating that REE was difficult to accumulate in the brainstem, but it was susceptible to cerebral cortex, thus causing sub-clinical damage. This condition was confirmed in the animal experiment. It was suggested that the toxicity through long-term intake of small doses of REE might not be negligible, and the hazard of REE environments should be investigated.
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Affiliation(s)
- W Zhu
- Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, P.R. China
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Abstract
An ophthalmofunduscope was used to investigate arteriosclerosis among villagers aged 20-40 yr old in two rare earth areas in Ganzhou, Jiangxi Province. It was noted that the occurrence of arteriosclerosis of the fundus aculi was significantly high (P < 0.05-0.01), the detection of serum cholesterol (CHO) was remarkably increased (P < 0.01), and the level of IgM was also elevated. However, high-density lipoprotein (HDL) remained at a low level. The effect of taking rare earth elements (REE) could be direct or indirect, thus causing an increase in cholesterol and interfering with the synthesis of high-density lipoprotein. Furthermore, rare earth could also cause immunogenic damage to the vascular wall. All of these could facilitate the formation of arteriosclerosis.
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Affiliation(s)
- W Zhu
- Institute of Geochemistry, Chinese Academy of Sciences, Giyang, Guizhou, P.R.C
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Shen Z, Shao P, Liu H. [Study of skeletal and occlusal pattern]. Zhonghua Kou Qiang Yi Xue Za Zhi 1996; 31:207-9. [PMID: 9592269] [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: 02/07/2023]
Abstract
The aims of this study were to analyze the characteristics of craniofacial structure in normal occlusion and to assess the relationship between the skeletal and occlusal pattern. Fifty-seven subjects with normal occlusion were divided into three skeletal groups according to Hauston measurement. One hundred and sixty-six subjects with Angle's malocclusion were also classified according to ANB values. The result showed that there were significant differences in the values of NA-APg, AB-NPg, SNA, SNB, U1-NA, L1-NB among the three groups. These data indicate that skeletal pattern does not coincide with occlusion. Different skeletal pattern exists even in normal occlusion. In diagnosis and treatment planning, the data of skeletal pattern should be referred.
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Affiliation(s)
- Z Shen
- School of Stomatology, HuBei Medical University, Wuhan
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Steinmann B, Eyre DR, Shao P. Urinary pyridinoline cross-links in Ehlers-Danlos syndrome type VI. Am J Hum Genet 1995; 57:1505-8. [PMID: 8533783 PMCID: PMC1801424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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Wang LD, Shi ST, Zhou Q, Goldstein S, Hong JY, Shao P, Qiu SL, Yang CS. Changes in p53 and cyclin D1 protein levels and cell proliferation in different stages of human esophageal and gastric-cardia carcinogenesis. Int J Cancer 1994; 59:514-9. [PMID: 7960222 DOI: 10.1002/ijc.2910590414] [Citation(s) in RCA: 76] [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: 01/28/2023]
Abstract
The objective of this study was to quantify the changes in p53 and cyclin D1 protein levels in different stages of human esophageal and gastric cardia carcinogenesis in a high-risk population in Henan, China. Immunoreactivity of p53, cyclin D1 and proliferating-cell nuclear antigen (PCNA) was observed in the cell nuclei of esophageal and gastric cardia biopsies. The number of p53-immunostaining-positive cells was low in normal epithelia, slightly increased in basal-cell hyperplasia (BCH), markedly increased in dysplasia (DYS) (10-fold), and further increased in squamous-cell carcinoma (SCC) (40-fold). This pattern of change was similar to that of cell proliferation as indicated by PCNA immunostaining. On the other hand, the number of cyclin D1-immunostaining-positive cells did not increase from BCH to DYS, although a slight increase from DYS to SCC was noted. In the gastric cardia, again, the pattern of change of p53-positive cells in different stages of lesions paralleled the pattern of cell proliferation. The number of p53-positive cells was very low, much lower than that of PCNA-positive cells, in normal, chronic superficial gastritis (CSG) and chronic atrophic gastritis (CAG); therefore, the increase of p53-positive cells from CAG to DYS was more dramatic (100-fold). From DYS to adenocarcinoma (AC), the p53-positive and the PCNA-positive cells increased 4-fold. On the other hand, the number of cyclin D1-positive cells did not increase in pre-cancerous lesions, but increased slightly in AC. This study demonstrates that p53 protein accumulation increased with the progression of pre-cancerous lesions, especially in the genesis of dysplasia, both in the esophagus and in the gastric cardia. Our approach of quantitative immunohistochemistry sheds light on the mechanisms of genesis of esophageal and gastric-cardia cancers, which frequently occur together in many high-incidence areas.
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Affiliation(s)
- L D Wang
- Laboratory for Cancer Research, College of Pharmacy, Rutgers University, Piscataway, NJ 08854
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Abstract
Bone resorption shows a circadian rhythm in human subjects, but the physiological mechanisms underlying this rhythm are unknown. We compared the circadian rhythm of bone collagen degradation in 18 premenopausal women before and after oral calcium supplementation (1000 mg calcium for 14 days). Subjects were randomized to receive calcium at either 0800 h or 2300 h. Continuous 48-h urine collections and 1 day of 4-h urine collections were obtained before and after the 14-day supplementation period. We measured urinary deoxypyridinoline (Dpd) and the cross-linked N-telopeptide of type I collagen (NTx) as biochemical markers of bone resorption. There was a significant effect of time of day on excretion of Dpd and NTx (analysis of variance, P < 0.001) with peak excretion between 0300-0700 h and a nadir between 1500-1900 h. The mean amplitude (peak to trough) was similar for Dpd and NTx (70.3% and 63.3%, respectively). Evening calcium supplementation resulted in marked suppression of the nocturnal increase in Dpd and NTx and reversed the usual nocturnal increase in the level of parathyroid hormone. In contrast, morning calcium supplementation had no significant effect on the circadian rhythm of Dpd or NTx. Evening calcium supplementation suppressed overall daily excretion of Dpd by 20.1% (P = 0.03) and NTx by 18.1% (P = 0.03). Morning calcium supplementation had no significant effect on overall daily excretion of either Dpd or NTx. We conclude that evening calcium supplementation suppresses the circadian rhythm of bone resorption. The daily rhythm of PTH secretion or calcium intake is likely to be an important determinant of this rhythm. Experimental protocols designed to investigate the effect of calcium supplementation on bone mineral density should take the timing of supplementation into account.
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Affiliation(s)
- A Blumsohn
- Department of Human Metabolism and Clinical Biochemistry, University of Sheffield, England
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Gertz BJ, Shao P, Hanson DA, Quan H, Harris ST, Genant HK, Chesnut CH, Eyre DR. Monitoring bone resorption in early postmenopausal women by an immunoassay for cross-linked collagen peptides in urine. J Bone Miner Res 1994; 9:135-42. [PMID: 8140926 DOI: 10.1002/jbmr.5650090202] [Citation(s) in RCA: 123] [Impact Index Per Article: 4.1] [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] [Indexed: 01/29/2023]
Abstract
A new immunoassay using an ELISA approach for measuring urinary excretion of cross-linked N-telopeptides of type 1 collagen was evaluated as a specific measure of bone resorption. The assay was applied to 65 early postmenopausal women who participated in a placebo-controlled trial of the aminobisphosphonate, alendronate sodium. Eight blood and urine samples were collected over a 9 month interval. Baseline cross-linked peptide excretion varied from 26 to 216 pmol BCE (bone collagen/mumol Cr. Within-subject variability (CV) for cross-linked peptide excretion was 20.2% over the 9 months in placebo-treated subjects, substantially less than that observed for other biochemical markers of bone resorption: 45, 53, and 63% for fasting urinary calcium and hydroxyproline and 24 h urinary lysylpyridinoline (HPLC assay), respectively. Baseline cross-linked peptide excretion correlated significantly (p < 0.001) with baseline total urine lysylpyridinoline and serum osteocalcin, but not with the other biochemical markers. Initial peptide excretion also correlated inversely with lumbar spine bone mineral density at entry (r = -0.26, p < 0.05). Treatment for 6 weeks with alendronate produced a dose-dependent suppression of cross-linked peptide excretion (0 +/- 8, 29 +/- 6, 56 +/- 5, and 64 +/- 3% for 0, 5, 20, and 40 mg, respectively, p < 0.01 versus placebo for treatment effect), with a return toward pretreatment values during follow-up. Measurement of the urinary cross-linked N-telopeptides of type I collagen by this new ELISA approach appears promising as a simple and reliable method to assess overall bone resorption.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- B J Gertz
- Merck Research Laboratories, Rahway, New Jersey
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Shao P, Huang YQ, Xia J, Shao QW. [Giant mandibular second molar: Report of one case]. Shanghai Kou Qiang Yi Xue 1993; 2:66. [PMID: 15159845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Affiliation(s)
- P Shao
- Department of Dentistry, Wuma Health Clinic, Lucheng District of Wenzhou City. Zhejiang 325000,China
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