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Wang F, Zhou DS, Wei GZ, Ren FC, Liu JK. Chlorantholides A-F, eudesmane-type sesquiterpene lactones from Chloranthus elatior. Phytochemistry 2012; 77:312-7. [PMID: 22387090 DOI: 10.1016/j.phytochem.2012.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 12/04/2011] [Accepted: 02/10/2012] [Indexed: 05/15/2023]
Abstract
Six eudesmane-type sesquiterpene lactones, named chlorantholides A-F, were isolated from the ethanol extract of Chloranthus elatior (Chloranthaceae) together with 12 known compounds. Their structures were elucidated on the basis of extensive spectroscopic analysis, and their absolute configurations were studied by the CD exciton chirality method. The structure of a recently reported eudesmanolide from Chloranthus anhuiensis: 8β-hydroxy-1-oxoeudesma-3,7(11)-dien-12,8-olide, was also revised as 8β-hydroxy-2-oxoeudesma-3,7(11)-dien-12,8-olide (chlorantholide D).
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Affiliation(s)
- Fei Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
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Wu DJ, Liu SL, Hao AH, Zhou DS, Liu JL, Zhao JJ, Cui FZ, Zhou CJ, Wang XW, Ma SZ, Zhang C, Gao CZ. Enhanced repair of segmental bone defects of rats with hVEGF-165 gene-modified endothelial progenitor cells seeded in nanohydroxyapatite/collagen/poly(l-lactic acid) scaffolds. J BIOACT COMPAT POL 2012. [DOI: 10.1177/0883911512439599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A new type of tissue-engineered bone was constructed by seeding hVEGF165 gene-modified endothelial progenitor cells into the nanohydroxyapatite/collagen/poly(L-lactic acid) scaffolds. These were implanted into the segmental femoral defects of rats to explore the promotion of angiogenesis and osteogenesis. The bone marrow of Sprague Dawley rats was cultured and proliferated, and the endothelial progenitor cells were transfected with Ad5–hVEGF165–EGFP. The gene-modified endothelial progenitor cells were seeded into the nanohydroxyapatite/collagen/poly(L-lactic acid) scaffolds; the growth was observed by scanning electron microscope, and the proliferation was evaluated by methyl thiazolyl tetrazolium assay. In vivo, 80 Sprague Dawley rats were divided randomly into four groups; segmental femoral defects (5 mm) were made and allografted: group A with hVEGF165/endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid), group B with mock endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid), group C with endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid), and group D with scaffolds only. Radiographic, histological, and microvessel density tests were performed to evaluate the angiogenic and osteogenic ability. Reverse transcription polymerase chain reaction and western blot results showed that the target gene was expressed by endothelial progenitor cells. The scanning electron microscope findings and methyl thiazolyl tetrazolium assay revealed that endothelial progenitor cells were attached and proliferated within the nanohydroxyapatite/collagen/poly(L-lactic acid) scaffolds. The average radiographic score and capillary density were the highest in group A, and those in groups B and C were higher than that of group D. The histology showed osteogenesis and scaffold degradation in group A, with less in groups B and C and little in group D. The hVEGF165 gene-modified endothelial progenitor cells, which promoted angiogenesis and osteogenesis in bone-defected areas and the hVEGF165/endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid) composites, may have potential application in repair of segmental bone defects.
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Affiliation(s)
- Dong-Jin Wu
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan, People’s Republic of China
| | - Shu-Ling Liu
- Department of Radiology, the Hospital Affiliated to Shandong University of Traditional Chinese Medicine, Jinan, People’s Republic of China
| | - Ai-Hua Hao
- Department of Radiology, the Hospital Affiliated to Shandong University of Traditional Chinese Medicine, Jinan, People’s Republic of China
| | - Dong-Sheng Zhou
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan, People’s Republic of China
| | - Jun-Li Liu
- Laboratory of Clinical Molecular Biology, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Jing-Jie Zhao
- Laboratory of Clinical Molecular Biology, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Fu-Zhai Cui
- Department of Materials Science and Engineering, Tsinghua University Institute of Regenerative Medicine and Biomimetic Materials, Tsinghua University, Beijing, People’s Republic of China
| | - Cheng-Jun Zhou
- Department of Pathology, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Xiu-Wen Wang
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Sheng-Zhong Ma
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Cheng Zhang
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Chun-Zheng Gao
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
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Abstract
Five new indole alkaloids rauvotetraphyllines A–E (1–5), together with eight known analogues, were isolated from the aerial parts of Rauvolfia tetraphylla. The structures were established by means of spectroscopic methods.
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Affiliation(s)
- Yuan Gao
- />State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- />BioBioPha Co., Ltd., Kunming, 650201 China
- />Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | | | - Ling-Mei Kong
- />State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- />Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | - Ping Hai
- />BioBioPha Co., Ltd., Kunming, 650201 China
| | - Yan Li
- />State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Fei Wang
- />State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- />BioBioPha Co., Ltd., Kunming, 650201 China
| | - Ji-Kai Liu
- />State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
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Abstract
One rare tetracyclic macroline-type indole alkaloid, named rauvoyunine A (1), and two new picraline-type alkaloids rauvoyunines B and C (2 and 3) were isolated from the aerial parts of Rauvolfia yunnanensis. Their structures were elucidated on the basis of extensive spectroscopic analysis. Compounds 2 and 3 were evaluated for their in vitro cytotoxicity against five human tumor cell lines. ![]()
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Affiliation(s)
- Yuan Gao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- BioBioPha Co., Ltd., Kunming, 650201 China
- Graduate University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Fei Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- BioBioPha Co., Ltd., Kunming, 650201 China
| | | | - Yan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Ji-Kai Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
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Dong JL, Li LX, Mu WD, Wang YH, Zhou DS, Wei Hao, Zou DB, Kun Hu, Ji Li, Cui FZ. Bone Regeneration with BMP-2 Gene-modified Mesenchymal Stem Cells Seeded on Nano-hydroxyapatite/Collagen/ Poly(L-Lactic Acid) Scaffolds. J BIOACT COMPAT POL 2010. [DOI: 10.1177/0883911510380436] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this study, the capacity of bone morphogenetic protein 2 (BMP-2) gene-transfected bone marrow-derived mesenchymal stem cells (MSCs) in combination with nano-hydroxyapatite/collagen/poly(L-lactic acid) (nHAC/ PLA) to improve the repair of bone defects in rabbit was explored. MSCs from New Zealand White rabbits were cultured and injected with pIRES2-EGFPhBMP-2 or pIRES2-EGFP by electroporation. After the transfer efficiency was determined through the expression of EGFP, the MSCs were seeded on scaffolds to generate an in vitro 3D cell/scaffold construct. The adhesion and proliferation of the MSCs cultured in the scaffold was assessed by SEM. The cellular constructs obtained were allografted into the 15 mm critical-sized segmental bone defects in the radius of New Zealand White rabbits for 12 weeks. The bone regeneration was assessed by radiographical and histological analyses. In vitro, nHAC/PLA facilitated MSC adhesion and proliferation on the scaffold, and gene transfer efficiency reached a maximum of 35.5 ± 3.8%. In vivo, the implantation of BMP-2 transfected MSCs/nHAC/PLA construct significantly enhanced the formation of new bone in the segmental defect, compared to the control groups. This novel 3D BMP-2 transfected MSCs/nHAC/PLA construct has the potential for bone repair by genetic tissue engineering approach.
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Affiliation(s)
- Jin-Lei Dong
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan 250021, People's Republic of China
| | - Lian-Xin Li
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan 250021, People's Republic of China
| | - Wei-Dong Mu
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan 250021, People's Republic of China
| | - Yong-Hui Wang
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan 250021, People's Republic of China
| | - Dong-Sheng Zhou
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan 250021, People's Republic of China,
| | - Wei Hao
- Department of Spinal Cord Injury, General Hospital of Ji'nan Military Area, Jinan 250031, People's Republic of China
| | - De-Bo Zou
- Department of Orthopedics, Qianfoshan Hospital Affiliated to Shandong University, Jinan 250014, People's Republic of China
| | - Kun Hu
- Institute of Nuclear and New Energy Technology Tsinghua University, Beijing 100084, People's Republic of China
| | - Ji Li
- Department of Orthopedics, Jinan Fourth Hospital Jinan 250031, People's Republic of China
| | - Fu-Zhai Cui
- State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering, Tsinghua University Beijing 100084, People's Republic of China,
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Mu WD, Wang XQ, Jia TH, Zhou DS, Cheng AX. Quantitative anatomic basis of antegrade lag screw placement in posterior column of acetabulum. Arch Orthop Trauma Surg 2009; 129:1531-7. [PMID: 19221771 DOI: 10.1007/s00402-009-0836-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2008] [Indexed: 10/21/2022]
Abstract
BACKGROUND Lag screw fixation has been recommended for treatment of acetabular and pelvic fracture for several years. The aim of the present study was to determine the projection of the axis of the posterior column on the inner table of the iliac wing in the supra-acetabular region. METHODS Thirty adult dried bony hemipelves specimens and other five intact adult dried pelvic specimens were included in this study. The projection point of the axis of the posterior column of the acetabulum was determined on the inner table of the iliac wing of the hemipelves specimens. The perpendicular distance from the optimal entry point to the linea terminalis of pelvis was measured and recorded as the lateral distance. The same measurement along the linea terminalis from the optimal entry point to the junction between the anterior border of iliosacral articulation and the linea terminalis of pelvis was made and recorded as the posterior distance. The depth of the anchor path and the corresponding average retroversion angulation and extraversion angulation were also measured. According to the results acquired from this study, a series of 6.5 mm lag screws were inserted into the posterior column of each side of the other five intact specimens, respectively, to evaluate the position of the screws. The data were expressed as mean +/- SD and analyzed by using the descriptive methods with SPSS 10.0. RESULTS The average length of lag screw was 104.8 +/- 4.2 mm. The average lateral distance was 16.8 +/- 2.1 mm. The average posterior distance was 23.5 +/- 3.4 mm. The corresponding average retroversion angulation and extraversion angulation were 57 degrees 36' +/- 4 degrees 28' and 119 degrees 18' +/- 2 degrees 32', respectively. The insertion of the single 6.5 mm lag screw of adequate length was possible in the posterior column along its anchor path and no accidental extraosseous or intraarticular screw placement had occurred. CONCLUSIONS The present study describes a safe anchor path of antegrade lag screw fixation in the posterior column. Insertion of the lag screws of adequate length is possible in the posterior column along its functional axis.
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Affiliation(s)
- Wei-Dong Mu
- Department of Orthopaedics, Provincial Hospital Affiliated to Shandong University, Jinan, China.
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57
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Zhou DS, Sun D, Yang SY, Huang RB. Poly[(μ(2)-4,4'-bipyridine)bis-(μ(4)-5-tert-butyl-isophthalato)bis-(μ(3)-5-tert-butyl-isophthalato)di-μ(3)-hydroxido-penta-zinc(II)]. Acta Crystallogr Sect E Struct Rep Online 2009; 65:m1078-9. [PMID: 21577432 PMCID: PMC2969937 DOI: 10.1107/s1600536809031365] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Accepted: 08/08/2009] [Indexed: 11/15/2022]
Abstract
The asymmetric unit of the title compound, [Zn5(C12H12O4)4(OH)2(C10H8N2)]n, consists of three ZnII ions (one of which is located on a twofold rotation axis), two 5-tert-butylisophthalate ligands, one 4,4′-bipyridine ligand and one hydroxide group. The five ZnII ions form a pentanuclear zinc cluster, which is further bridged by ten organic ligands, forming two-dimensional sheets. The central zinc ion of the cluster has site symmetry 2 and is octahedrally coordinated in a N2O4 donor set, whereas the other four zinc atoms are tetrahedrally coordinated by four O atoms. The coordination modes for the 5-tert-butylisophthalates are bis(bidentate) or bidentate-monodentate. Hydrogen bonds are formed between adjacent sheets through the hydroxide groups and the O atoms of the monodentate carboxylate groups. The two tert-butyl groups are disordered over two positions with ratios of 0.64 (2):0.36 (2) and 0.85 (3):0.15 (3).
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Affiliation(s)
- Dong-Sheng Zhou
- Department of Chemistry, Xiamen University, Xiamen 361005, People's Republic of China
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58
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Zhou DS, Wang FK, Yang SY, Xie ZX, Huang RB. Substituent effect on the assembly of coordination polymers containing isophthalic acid and its derivatives. CrystEngComm 2009. [DOI: 10.1039/b907142c] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cheng XR, Zhou WX, Zhang YX, Zhou DS, Yang RF, Chen LF. Differential gene expression profiles in the hippocampus of senescence-accelerated mouse. Neurobiol Aging 2007; 28:497-506. [PMID: 16569465 DOI: 10.1016/j.neurobiolaging.2006.02.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [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: 06/21/2005] [Revised: 01/27/2006] [Accepted: 02/10/2006] [Indexed: 02/04/2023]
Abstract
The senescence-accelerated mouse (SAM) is an animal model for studying senescence and age-associated disorders due to its inherited aging phenotype. The SAM/prone8 (SAMP8) is a useful animal model to investigate the fundamental mechanisms involved in age-related learning and memory deficits that may have relevance to age-associated AD, while SAM/resistant1 (SAMR1) shows normal. To identify genes rendering the cognitive deterioration with aging, the subtractive cDNA libraries containing 1924 clones with the positive ratio of 96.18% were generated and the microarray containing 3136 cDNA was prepared. The results of screening libraries by the microarray showed that of all 91 differentially expressed genes, 50 were over-expressed and 41 were low-expressed in SAMP8. Some of the identified genes were confirmed by the real time quantitative RT-PCR. These results indicated the profiles of gene expression in the hippocampus of SAMP8 and SAMR1 were significantly different, which may play important roles in the age-related cognitive deficit in SAMP8, suggesting those genes related to the cognitive deficient or pathology change in the brain of SAMP8 may be potential gene targets for Alzheimer's disease therapy.
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Affiliation(s)
- Xiao-Rui Cheng
- Beijing Institute of Pharmacology and Toxicology, Beijing 100850, PR China
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60
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Tong ZZ, Zhou DS, Song YJ, Zhang L, Pei D, Han YP, Pang X, Li M, Cui BZ, Wang J, Guo ZB, Qi ZZ, Jin LX, Zhai JH, Du ZM, Wang XY, Wang J, Huang PT, Yang HM, Yang RF. Genetic variations in the pgm locus among natural isolates of Yersinia pestis. J GEN APPL MICROBIOL 2005; 51:11-9. [PMID: 15864756 DOI: 10.2323/jgam.51.11] [Citation(s) in RCA: 8] [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: 11/03/2022]
Abstract
A PCR-based screening method was used to study the genetic variations of the pgm locus among natural isolates of Yersinia pestis from China. Our results indicate that genetic variations in the pgm locus are well correlated with biovars of Y. pestis and plague foci, suggesting that the pgm locus plays a role in Y. pestis adaptation to its environment. The gene encoding two-component regulatory system sensor kinase became a pseudogene in all strains of biovar Orientalis due to a thymidine deletion, while it is intact in all the strains of the other biovars. Only strains from Foci H and L are the same as Yersinia pseudotuberculosis in that they have an intact transmembrane helix in the sensor kinase protein, which is lost in all the other strains because of the 18 bp in-frame deletion. The IS100 element that flanks the 39 terminus of the pgm locus was inserted into the chromosome during the within-species microevolution of Y. pestis, which is absent in strains from Foci G, H and L and also in Y. pseudotuberculosis. This fact indicates that the strains from these three foci are of an older lineage of Chinese Y. pestis. It is this IS100 element's absence that maintained high stability of the pgm locus in the Y. pestis strains from these three foci. The IS285 element insertion in the pigmentation segment and the IS100 element insertion in the downstream flanking region of the pgm locus are only present in strains from Foci H and L. The flanking region outside the 59 terminus of the upstream IS100 element is identical in the strains from these two foci, which is different in the other strains. All of these unique characteristics suggest that they are of a special lineage of Chinese Y. pestis.
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Affiliation(s)
- Zong-Zhong Tong
- Beijing Genomics Institute, Chinese Academy of Sciences, Beijing 101300, P. R. China
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61
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He H, Yu JS, Xu SP, Zhou DS, Liu Y. [Interaction between protein and ciprofloxacin]. Yao Xue Xue Bao 2001; 36:549-51. [PMID: 12585092] [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: 04/20/2023]
Abstract
AIM To study the interaction between ciprofloxacin and BSA in physiological condition by fluorescence spectroscopy. METHODS The affection of drug to the protein conformation was investigated. The binding constant between drug and BSA from a double reciprocal Lineweaver-Burk plot was determined and the main sort of binding force was found according to the thermodynamic parameters. RESULTS The binding constants between BSA and ciprofloxacin at 26 degrees C and 45 degrees C are about 10(4). At 26 degrees C, the thermodynamic parameters of reaction between BSA and ciprofloxacin are delta H = -49.13 kJ.mol-1, delta G = -26.45 kJ.mol-1, delta S = -75 kJ.mol-1. The maximum wavelength of the synchronous fluorescence spectra of BSA moved from 279 nm to 289 nm with the increasing of the amount of ciprofloxacin. CONCLUSION There exists fluorescence energy transfer between BSA and ciprofloxacin. The main sort of binding force between BSA and ciprofloxacin is Van der Waals' interaction. Ciprofloxacin can be deposited and be transported by serum protein in vivo. Ciprofloxacin affects the protein conformation.
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Affiliation(s)
- H He
- Deparment of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China
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Butrapet S, Kimura-Kuroda J, Zhou DS, Yasui K. Neutralizing mechanism of a monoclonal antibody against Japanese encephalitis virus glycoprotein E. Am J Trop Med Hyg 1998; 58:389-98. [PMID: 9574781 DOI: 10.4269/ajtmh.1998.58.389] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/07/2022] Open
Abstract
The neutralization of Japanese encephalitis virus (JEV) was studied using JEV-specific neutralizing (NT) monoclonal antibody (MAb) 503 that recognizes the envelope glycoprotein. Analysis using radiolabeled JEV and observations by confocal laser microscopy and electron microscopy indicated that the NT and protection activities of MAb 503 did not result from the prevention of the first step of JEV infection, binding of virus to the cell surface. Treatment with MAb 503 strongly inhibited JEV-induced cell fusion and internalization of JEV into the cells, and resulted in enhanced release of JEV-RNA from the cells. These observations suggested that the NT activity of MAb 503 is involved in the later steps of JEV infection.
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Affiliation(s)
- S Butrapet
- Department of Microbiology and Immunology, Tokyo Metropolitan Institute for Neuroscience, Fuchu-City, Japan
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Seki K, Zhou DS, Komuro T. Immunohistochemical study of the c-kit expressing cells and connexin 43 in the guinea-pig digestive tract. J Auton Nerv Syst 1998; 68:182-7. [PMID: 9626946 DOI: 10.1016/s0165-1838(97)00134-3] [Citation(s) in RCA: 37] [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] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The distribution of the c-kit receptor expressing cells and gap junction protein, connexin (Cx) 43 in the guinea-pig stomach (antrum), small intestine (jejunum) and colon (ascending) was studied by immunohistochemistry. The anti-c-kit protein immunopositive cells were regularly observed in the myenteric region throughout all three organs. The immunopositive cells were also sparsely distributed in the circular muscle layer of both the stomach and the colon, but not in the small intestine. They were densely located in the regions of the deep muscular plexus (DMP) of the small intestine and submuscular plexus (SMP) of the colon. In contrast, strong immunoreactivity to anti-Cx 43 antibody was observed in almost the entire thickness of the circular muscle layer of the stomach and the small intestine, but not in the colon. Dense immunoreaction deposits were observed in the region of the DMP and SMP. However, only very weak immunoreactivity to anti-Cx 43 antibody was detected in the myenteric region of all three organs. These results suggest that the c-kit receptor expressing cells or interstitial cells of Cajal (ICC) in the myenteric region of the three organs, and in the SMP of the colon, are poorly coupled with the bulk of circular muscle tissue by gap junctions, while ICC in the DMP and in the circular muscle layer of the stomach couple well with the surrounding muscle tissue.
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Affiliation(s)
- K Seki
- Department of Basic Human Sciences, School of Human Sciences, Waseda University, Tokorozawa, Saitama, Japan.
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Komuro T, Zhou DS. Anti-c-kit protein immunoreactive cells corresponding to the interstitial cells of Cajal in the guinea-pig small intestine. J Auton Nerv Syst 1996; 61:169-74. [PMID: 8946337 DOI: 10.1016/s0165-1838(96)00078-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Interstitial cells of Cajal (ICC) of the guinea-pig small intestine were studied with whole-mount preparations by using the zinc iodide-osmic acid method (ZIO) and immunohistochemistry for vimentin and c-kit receptor tyrosine kinase, and by electron microscopy. The myenteric ICC visualized with ZIO staining are immunopositive to both anti-c-kit antibody (ACK-2) and anti-vimentin antibody (V9), and constitute an independent cellular network from the myenteric plexus. Those cells are characterized by many mitochondria, abundant intermediate filaments, and surface cell membranes not covered with a basal lamina. They are connected with each other by gap junctions at tips of the cytoplasmic processes. It is concluded that the myenteric ICC of the guinea-pig intestine are fibroblast-like cells and that they correspond to the c-kit expressing cells regarded as the intestinal pacemaker.
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Affiliation(s)
- T Komuro
- Department of Basic Human Sciences, School of Human Sciences, Waseda University, Saitama, Japan.
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65
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Komuro T, Tokui K, Zhou DS. Identification of the interstitial cells of Cajal. Histol Histopathol 1996; 11:769-86. [PMID: 8839765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Observation of whole mount stretch preparations using the zinc-iodide-osmic acid method reveals a wide variety of interstitial cells in different tissue layers of the guinea-pig small intestine. And a subsequent electron-microscopic examination and survey of references makes clear that the interstitial cells of Cajal (ICC) depicted in original drawings of Cajal are heterogeneous and correspond to different types of interstitial cells. The myenteric ICC are characterized by long dichotomous branching processes which constitute cellular networks independent from the nerve plexus and form many gap junctions at their tips. Their ultrastructure is similar to that of fibroblasts and they have no basal lamina. The myenteric ICC show strong immunoreactivity for vimentin and the c-kit receptor, and probably correspond to the intestinal pacemaker cells. Within the circular muscle layer, ICC are represented by the cells that are closely associated with fine nerve bundles. The ICC have various shapes, ranging from bipolar to stellate, depending on the running pattern of the nerve fibers that they are associated with. They show fibroblast-like ultrastructure and have no basal lamina. They form gap junctions with smooth muscle cells and are immunoreactive for vimentin. On the other hand, ICC associated with the deep muscular plexus described in the guinea-pig by Cajal could not be clearly identified. However, it is suggested that the ICC in this location may correspond to glycogen-rich cells possessing a basal lamina. Although they show a fairly well-developed rough endoplasmic reticulum, Golgi apparatus and immunoreactivity for vimentin, ICC of the deep muscular plexus are probably specialized smooth muscle cells in nature.
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Affiliation(s)
- T Komuro
- Department of Basic Human Sciences, Waseda University School of Human Sciences, Saitama, Japan
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Zhou DS, Desaki J, Komuro T. Neuro-muscular junctions of longitudinal and circular muscle fibers of the guinea-pig esophagus and their relation to myenteric plexus. J Auton Nerv Syst 1996; 58:63-8. [PMID: 8740661 DOI: 10.1016/0165-1838(95)00116-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The structure of the neuromuscular junctions (NMJs) and their relation to the myenteric plexus were studied by zinc iodide-osmic acid (ZIO) staining and by scanning electron microscopy in the guinea-pig esophagus. The esophageal muscle coat consisted of the inner circular and outer longitudinal striated muscle fibers. The myenteric plexus was located between the two muscle layers along its whole length and was characterized by a loose and irregular network. It was demonstrated that unmyelinated nerve fibers form NMJs with the muscle fibers of both layers. The NMJs in the longitudinal muscle can be classified as 'plate' type, whereas those of the circular muscle resemble the 'grape' type. The different NMJs in the two muscle layers probably correspond to different contractile properties. The whole-mount preparations with ZIO staining also demonstrated that some NMJs receive minute branches from the myenteric plexus. Therefore, it is likely that the myenteric plexus is involved in the control of striated muscles of the guinea-pig esophagus.
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Affiliation(s)
- D S Zhou
- Department of Basic Human Sciences, School of Human Sciences, Waseda University, Saitama, Japan
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Zhou DS, Komuro T. Ultrastructure of the zinc iodide-osmic acid stained cells in guinea pig small intestine. J Anat 1995; 187 ( Pt 2):481-5. [PMID: 7592010 PMCID: PMC1167442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
This study has demonstrated that cells stained using the zinc iodide-osmic acid (ZIO) method have the same fine structural features as those of fibroblasts. They have a well developed Golgi apparatus, granular endoplasmic reticulum and many mitochondria. They have no basal lamina. They are distributed in association with the deep muscular plexus, within the outer circular muscle layer and in the space between the circular and longitudinal muscle layers. Since this staining method is believed to co-stain nerves and interstitial cells of Cajal, we concluded that these ZIO-positive, fibroblast-like cells represent at least some, if not all, of the interstitial cells which appeared in the original description by Cajal.
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Affiliation(s)
- D S Zhou
- Department of Basic Human Sciences, School of Human Sciences, Waseda University, Saitama, Japan
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Zhou DS, Komuro T. The cellular network of interstitial cells associated with the deep muscular plexus of the guinea pig small intestine. Anat Embryol (Berl) 1992; 186:519-27. [PMID: 1292369 DOI: 10.1007/bf00186974] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Systematic examination using electron microscopic montages and serial sections has demonstrated that three types of interstitial cell, namely gap junction-rich cells, glycogen-rich cells and fibroblast-like cells, are densely located along the whole extent of the deep muscular plexus of the guinea pig small intestine. They tend to be distributed in an alternating fashion in the cellular network, connected with muscle cells of the outer, circular layer by means of gap junctions. These three types of interstitial cell show close relations to two types of nerve varicosity: one type is characterized by clear round vesicles with diameters of about 50 nm, and the other by flattened vesicles measuring about 35 nm by 70 nm. Electron-dense patches have been observed at the cytoplasmic side of the axonal membranes. Muscle cells of both inner and outer circular layers also show close relations to these two types of nerve varicosity. These morphological features are discussed with the implication that they may have some regulatory role in intestinal movement.
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Affiliation(s)
- D S Zhou
- Department of Histology and Embryology, 3rd Military Medical College, Chongqing, People's Republic of China
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Zhou DS, Komuro T. Interstitial cells associated with the deep muscular plexus of the guinea-pig small intestine, with special reference to the interstitial cells of Cajal. Cell Tissue Res 1992; 268:205-16. [PMID: 1617694 DOI: 10.1007/bf00318788] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.6] [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: 12/27/2022]
Abstract
Interstitial cells associated with the deep muscular plexus of the guinea-pig small intestine were studied by electron microscopy, and three-dimensional cell models were reconstructed from serial ultrathin sections with a computer graphic system. Three types of cells were recognized. The first type was similar in shape to smooth muscle cells, but did not contain an organized contractile apparatus. Many large gap junctions comprising about 4% of the cell surface were present; they connected cells of the first type to each other, to the second type of cell and to smooth muscle cells of the outer circular layer. The second type of cell had a well-demarcated cell body with long slender processes and was characterized by a large amount of glycogen comprising about 9% of the cell volume. The third type of cell was similar to fibroblasts, and contained well-developed Golgi apparatus and rough endoplasmic reticulum. Some of these fibroblast-like cells (a possible subtype) formed small gap junctions. All three types of cells showed close relationships with nerve varicosities. This cellular network consisting of gap-junction-rich cells, glycogen-rich cells and smooth muscle cells may be involved in the pacemaking activity of intestinal movement.
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Affiliation(s)
- D S Zhou
- Department of Anatomy, Ehime University, School of Medicine, Japan
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Zhang GS, Zhou DS. [Study on risk factors involving train traffic accidents--effects of human factors on accidents]. Zhonghua Yu Fang Yi Xue Za Zhi 1991; 25:282-4. [PMID: 1773671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This article analysed human factors involving train traffic accidents by using log-linear model. The results showed that lower degree of culture (OR = 2.571) and weak nervous type (OR = 2.099) were risk factors involving train traffic accidents. Interactions were shown to exist between nervous type and degree of culture, average sleeping time everyday, and visuomotor reaction time.
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Affiliation(s)
- G S Zhang
- Department of Health, Nanjing Railway Medical College
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Zhou DS. [Epidemiological features and causes of railway traffic accidents]. Zhonghua Yu Fang Yi Xue Za Zhi 1991; 25:26-9. [PMID: 2036908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This article reports on epidemiological features of railway traffic accidents and factors influencing traffic safety. An analysis of various kinds of railway traffic accidents over 30 years in Nanjing Railway Branch, Showed that railway traffic accidents have become a sort of modern social disease, and had particular epidemiological features. The peak of the epidemic curve appeared cyclically and had a close relation to social disturbances, Frequency of accident occurrence was the highest in the first season (period of spring transport) and the third season (period of high temperature) of the year thus most accidents happen in February and August. Most accidents occurred on Fridays and least on Mondays. Distribution of accidents had obvious "antenna" phenomenon in round graph which had a 24-hour cycle. Analysing the multiple factors influencing traffic safety, the results showed that the upper-limit-age of a train driver should not be more than 50 years old; The phenomenon "bathtub" between personage accident rate and age must be taken seriously. More attention should be paid to the psychological aspects when recruiting train drivers. In our country, it is urgent to set up standard of psychomovement function for choosing train locomotive drivers. Fatigue was one of the direct causes resulting in accident occurrences. No statistical correlation was found between biorhythm and accident occurrence.
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Dai MJ, Zhou DS. [Application of cluster analysis in adolescent development research (author's transl)]. Zhonghua Yu Fang Yi Xue Za Zhi 1981; 15:287-9. [PMID: 7341108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Zhou DS. [An approach to the statistical treatment of multiple groups of small frequencies in medical research--hypergeometric probability distribution and its application (author's transl)]. Zhonghua Yu Fang Yi Xue Za Zhi 1980; 14:211-3. [PMID: 7238185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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