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Zeng WF, Wu SH, Wang Z, Liu YM. [Current status of occupational health and related countermeasures in Guangzhou, China]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2016; 34:148-150. [PMID: 27014900 DOI: 10.3760/cma.j.issn.1001-9391.2016.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To investigate the current status of occupational health and related countermeasures in Guangzhou, China. METHODS Related data were collected from occupational poisoning accident investigation, diagnosis and identification of occupational diseases, and the occupational disease hazard reporting system, and the statistical data of occupational health in Guangzhou were analyzed retrospectively. RESULTS The number of enterprises reporting for occupational disease hazards in Guangzhou was 20 890, and the total number of workers was 1 457 583. The number of workers exposed to occupational hazards was 284 233, and the cumulative number of workers with occupational diseases was 1 502. There were many risk factors for occupational diseases in enterprises, and there were a large number of workers with occupational diseases, as well as newly diagnosed cases. From 2001 to 2014, the total number of cases of occupational diseases was 958. CONCLUSION The situation for the prevention and control of occupational diseases is grim in Guangzhou. Occupational health supervision and law enforcement should be enhanced, the three-level supervision system should be established and perfected, and the occupational health supervision system with a combination of "prevention, treatment, and protection" should be established and promoted, so as to gradually establish a technical service support system for occupational health.
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Affiliation(s)
- W F Zeng
- The Hospital of Prevention and Treatment for Occupational Diseases, Guangzhou 510620, China
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Xie D, Sham JST, Zeng WF, Lin HL, Bi J, Che LH, Hu L, Zeng YX, Guan XY. Correlation of AIB1 overexpression with advanced clinical stage of human colorectal carcinoma. Hum Pathol 2005; 36:777-83. [PMID: 16084947 DOI: 10.1016/j.humpath.2005.05.007] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [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: 01/25/2005] [Accepted: 05/04/2005] [Indexed: 12/14/2022]
Abstract
AIB1, a member of the steroid receptor coactivator 1 family, has been cloned on 20q12 and is a candidate oncogene in human breast cancer. It is commonly amplified and overexpressed in several types of human cancers. In this study, we examined the expression of AIB1, as related to clinicopathologic features, in 85 human colorectal cancers (CRCs). The status of the number of AIB1 copies, p53 expression, and DNA ploidy was also analyzed. The overexpression of AIB1 was detected in 35% of CRCs. Amplification of AIB1 was observed in 10% of CRCs. In addition, the overexpression of AIB1 was observed more frequently in CRCs in later clinical stages (T3 N1 M0/T3 N0 2M1), compared with that in T3 N0 M0 stage (P < .05). These results suggest that overexpression of AIB1 might provide a selective advantage for the developmental growth and/or progression of subsets of CRCs. In addition, a significant correlation (P < .05) of overexpression of AIB1 with p53 overexpression as well as with aneuploid DNA content was observed in these CRCs. The overexpression of p53 was also correlated significantly with CRC DNA ploidy (P < .05). Furthermore, there was a substantial population of CRCs showing overexpression of both AIB1 and p53 protein and all had aneuploid DNA content; most of these were in the later clinical stage. These findings suggest a possible convergence of AIB1 with a pathway involving p53, which might induce chromosomal instability and affect the clinical phenotype of a subset of CRCs.
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Affiliation(s)
- Dan Xie
- Cancer Center, Sun Yat-Sen University, Guangzhou 510275, China
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Xie D, Sham JST, Zeng WF, Che LH, Zhang M, Wu HX, Lin HL, Wen JM, Lau SH, Hu L, Guan XY. Oncogenic role of clusterin overexpression in multistage colorectal tumorigenesis and progression. World J Gastroenterol 2005; 11:3285-9. [PMID: 15929184 PMCID: PMC4316065 DOI: 10.3748/wjg.v11.i21.3285] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression pattern of clusterin in colorectal adenoma-carcinoma-metastasis series, and to explore the potential role of clusterin in multistage colorectal tumorigenesis and progression.
METHODS: A colorectal carcinoma (CRC)-tissue microarray (TMA), which contained 85 advanced CRCs including 43 cases of Dukes B, 21 of Dukes C and 21 of Dukes D tumors, were used for assessing the expression of clusterin (clone 41D) and tumor cell apoptotic index (AI) by immunohist-ochemistry and TUNEL assay, respectively. Moreover the potential correlation of clusterin expression with the patient’s clinical-pathological features were also examined.
RESULTS: The positive staining of clusterin in different colorectal tissues was primarily a cytoplasmic pattern. Cytoplasmic overexpression of clusterin was detected in none of the normal colorectal mucosa, 17% of the adenomas, 46% of the primary CRCs, and 57% of the CRC metastatic lesions. In addition, a significant positive correlation between overexpression of clusterin and advanced clinical (Dukes) stage was observed (P<0.01). Overexpression of cytoplasmic clusterin in CRCs was inversely correlated with tumor apoptotic index (P<0.01), indicating the anti-apoptotic function of cytoplasmic clusterin in CRCs.
CONCLUSION: These data suggests that overexpression of cytoplasmic clusterin might be involved in the tumorigenesis and/or progression of CRCs. The anti-apoptotic function of cytoplasmic clusterin may be responsible, at least in part, for the development and biologically aggressive behavior of CRC.
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Affiliation(s)
- Dan Xie
- Department of Clinical Oncology, The University of Hong Kong, Room 109, School of Chinese Medicine Building, 10 Sassoon Road, Hong Kong, China
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Hu L, Wen JM, Sham JST, Wang W, Xie D, Tjia WM, Huang JF, Zhang M, Zeng WF, Guan XY. Establishment of cell lines from a primary hepatocellular carcinoma and its metastatis. ACTA ACUST UNITED AC 2004; 148:80-4. [PMID: 14697646 DOI: 10.1016/s0165-4608(03)00206-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [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: 11/19/2022]
Abstract
Hepatocellular carcinoma (HCC) is one of the most common malignancies in the world with a very poor prognosis that has been associated with tumor metastasis. The molecular mechanism of HCC metastasis is still unclear. In this study, we established cell lines from a primary tumor (H2-P) and its metastasis (H2-M). G-banding karyotyping, comparative genomic hybridization, and fluorescence in situ hybridization were applied to study these two cell lines and the results demonstrated that they are of the same origin. These cell lines provide a very useful tool to identify genetic alterations associated with HCC metastasis.
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Affiliation(s)
- Liang Hu
- Department of Clinical Oncology, The University of Hong Kong, Room 109, 1/F, School of Chinese Medicine Building, 10 Sassoon Road, Hong Kong, China
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Xie D, Sham JST, Zeng WF, Lin HL, Che LH, Wu HX, Wen JM, Fang Y, Hu L, Guan XY. Heterogeneous expression and association of beta-catenin, p16 and c-myc in multistage colorectal tumorigenesis and progression detected by tissue microarray. Int J Cancer 2004; 107:896-902. [PMID: 14601048 DOI: 10.1002/ijc.11514] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.4] [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: 11/07/2022]
Abstract
Most colorectal carcinomas (CRCs) arise from adenomas through an archetypal pathogenic pathway, the adenoma-carcinoma-metastasis sequence. Aberrant expression of beta-catenin, p16, E-cadherin and c-myc appears to have played important roles in the development and/or progression of CRC, but their precise distribution pattern and associations in different pathologic loci along CRC's pathogenic pathway have not been thoroughly examined. In this study, a tissue microarray (TMA) containing 85 advanced CRCs in different Dukes stages was constructed. In each of 85 cases, tissue specimens from normal mucosa and primary carcinomas in different layers of the bowel wall were included in the TMA. Tissue specimens from matched adenoma, lymph node metastases and distant metastases were obtained from 22, 21 and 21 cases, respectively. Expression patterns of beta-catenin, p16, E-cadherin and c-myc were evaluated by immunohistochemistry. The results revealed that nuclear expression of beta-catenin, p16 and c-myc was quantitatively increased from normal mucosa to premalignant adenoma, primary carcinoma and lymph node metastatic carcinoma; the frequency of nuclear overexpression of beta-catenin and p16 in lymph node metastases was significantly higher than that in distant metastases (p < 0.05). These results suggest an association between nuclear overexpression of beta-catenin and/or p16 and CRC lymph node metastasis but not distant metastasis. The results also showed that correlative high nuclear expression of beta-catenin and c-myc was observed in primary carcinomas involving the serosa and lymph node metastases (p < 0.05) but not in other pathologic regions of CRCs, suggesting that the tumor microenvironment in different pathologic loci of colorectal tumorigenesis and progression may influence c-myc responsiveness to beta-catenin/Tcf activation.
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Affiliation(s)
- Dan Xie
- Department of Clinical Oncology, 1/F Building, School of Chinese Medicine, University of Hong Kong, 10 Sassoon Road, Hong Kong, China
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Hu L, Lau SH, Tzang CH, Wen JM, Wang W, Xie D, Huang M, Wang Y, Wu MC, Huang JF, Zeng WF, Sham JST, Yang M, Guan XY. Association of Vimentin overexpression and hepatocellular carcinoma metastasis. Oncogene 2004; 23:298-302. [PMID: 14647434 DOI: 10.1038/sj.onc.1206483] [Citation(s) in RCA: 173] [Impact Index Per Article: 8.7] [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: 02/07/2023]
Abstract
The poor prognosis of hepatocellular carcinoma (HCC) has been associated with recurrence and metastasis. Recently, we established a pair of HCC cell lines from a primary (H2-P) and its matched metastatic (H2-M) HCC tumors. A high density of cDNA microarray with 9184 human cDNA was used to identify the differentially expressed genes between H2-P and H2-M. Comparing with H2-P, eight upregulated and six downregulated genes were detected in H2-M. One interesting finding is the overexpression of Vimentin (VIM), a well-defined intermediate filament, which has been linked to a more aggressive status in various tumors. The correlation of overexpression of VIM and HCC metastasis was studied by immunohistochemistry using a tissue microarray with 200 primary HCCs and 60 pairs of primary and matched metastatic HCC samples. Tissue microarray demonstrated that the overexpression of VIM was significantly associated with HCC metastasis (P<0.01). This finding strongly suggests that the overexpression of VIM may play an important role in the metastasis of HCC.
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Affiliation(s)
- Liang Hu
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong, China
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He QJ, Zeng WF, Sham JST, Xie D, Yang XW, Lin HL, Zhan WH, Lin F, Zeng SD, Nie D, Ma LF, Li CJ, Lu S, Guan XY. Recurrent genetic alterations in 26 colorectal carcinomas and 21 adenomas from Chinese patients. Cancer Genet Cytogenet 2003; 144:112-8. [PMID: 12850373 DOI: 10.1016/s0165-4608(02)00959-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [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
Colorectal cancer (CRC) is one of the most common malignancies worldwide. The incidence of CRC in the Chinese population has increased dramatically during the last two decades; however, nonrandom chromosomal alterations in Chinese patients have not been described. In the present study, comparative genomic hybridization (CGH) was applied to detect recurrent chromosome alterations in 26 primary colorectal carcinomas and 21 colorectal adenomas from Chinese patients. In CRC, several recurrent chromosomal changes were found, including gains of 8q (14/26 cases, 54%), 20q (54%), 3q (50%), 13q (50%), 5p (46%), 7p (42%), 7q (42%), and 12p (38%) and losses of 18q (65%) and 17p (42%). From comparison with previous CGH studies, the frequent gains of 3q and 12p might be distinctive occurrences in Chinese patients. The distribution of frequently found chromosomal alterations in different locations was studied. The gain of 20q was more frequently found in colon cancer (P<0.01) and the gain of 12p was more frequently found in rectal cancer. Chromosomal alterations were found in 19/21 of adenomas; the most frequent chromosomal alteration was the loss of 18q (9/21 cases, 43%). These recurrent alterations provide several starting points for the isolation of candidate oncogenes and tumor suppressor genes.
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Affiliation(s)
- Qiao-Jie He
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong, China
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Lin YH, Lin YH, Tang SS, Tang SS, Lin CC, Lin CC, Chen JH, Chen JH, Zeng WF, Zeng WF, Wang SS, Wang SS, Lin HJ, Lin HJ. Molecular-Structure of bis(ethane-1,2-diolato)( tetraphenylporphyrinato )phosphorus(V) chloride: [P( tpp )(OCH2CH2OH)2]+Cl -. Aust J Chem 1995. [DOI: 10.1071/ch9951367] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The structure of bis(ethane-1,2-diolato)( tetraphenylporphyrinato )phosphorus(V) chloride, [P( tpp )(OCH2CH2OH)2]+Cl -, has been confirmed by X-ray diffraction. The cation displays an octahedral coordination about the phosphorus atom and exhibits a ruffled porphyrin geometry with a core size of 1.841 Ǻ. It crystallizes in the orthorhombic space group P212121, with a 12.524(3), b 25.177(5), c 14.275(3) Ǻ, and Z = 4. Refinement based on 4194 observed reflections led to a final R value of 5.1%. The displacement of the phosphorus atom from the porphyrin mean plane is 0.014 Ǻ. The geometry around the phosphorus centre of the [P( tpp )(OCH2CH2OH)2]+Cl- molecule has P-O(1) 1.643(4), P-O(3) 1.642(4) and P- Np 1.841(4) Ǻ. n.m.r. spectroscopy provides a complementary method for the investigation of the ethane-1,2-diolate ligand. The 13C resonances (24°C) of this axial ligand were observed at 62.9 [P-O-C-C-OH, with 2J(P,C) 16.1 Hz] and 57.8 ppm [P-O-C-C-OH with 3J(P,C) 19.1 Hz].
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