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Yu L, Liu J, Zhang TD, Zheng XF, Luo DL, Zhu WL, Qiu XW, Guo LL. Decreased TMEM40 expression is associated with malignant behavior of cutaneous squamous cell carcinoma and inhibits tumor progression. Oncol Lett 2021; 22:606. [PMID: 34188708 PMCID: PMC8227547 DOI: 10.3892/ol.2021.12867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 03/08/2021] [Indexed: 01/22/2023] Open
Abstract
Cutaneous squamous cell carcinoma (CSCC) is one of the most common types of skin cancer in humans worldwide. The identification and characterization of cancer-associated transmembrane proteins are important for understanding the molecular biology of CSCC. The aim of the present study was to evaluate the expression pattern of transmembrane protein 40 (TMEM40) in CSCC and its clinical significance. The underlying mechanisms were also examined. Reverse transcription-quantitative PCR, western blot and immunohistochemistry analysis were used to determine the relative expression of TMEM40 in CSCC cell lines and clinical tissue samples. The effect of TMEM40 gene silencing on cell proliferation was also evaluated using Cell Counting Kit-8 assays. Wound healing assays, flow cytometry and Transwell assays were used to explore the migration, cell cycle distribution/apoptosis and invasion of CSCC cells following TMEM40 silencing, respectively. In the present study, increased TMEM40 expression was observed in CSCC tissue samples, compared with normal skin, and TMEM40 expression was associated with large tumor size in patients with CSCC. In vitro functional assays indicated that TMEM40 was involved in the regulation of A431 and SCL1 cell growth through its effects on the cell cycle and apoptosis. Silencing TMEM40 in A431 and SCL1 cells resulted in cell cycle arrest at the G0/G1 phase and promoted apoptosis. In addition, migration and invasion were significantly inhibited following silencing of TMEM40 expression in CSCC cells. Taken together, the results of the present study indicated that reduced TMEM40 expression could inhibit CSCC development and that TMEM40 may represent a therapeutic target in CSCC.
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Affiliation(s)
- Lei Yu
- Department of Dermatology, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Jie Liu
- Department of Clinical Laboratory, Yantai Yuhuangding Hospital, Yantai, Shandong 264000, P.R. China
| | - Tang-De Zhang
- Department of Dermatology, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Xiu-Fen Zheng
- Department of Dermatology, Shunde Hospital of Southern Medical University, Shunde, Guangdong 528308, P.R. China
| | - Dong-Lan Luo
- Department of Dermatology, Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong 518028, P.R. China
| | - Wei-Liang Zhu
- Department of Oncology, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Xian-Wen Qiu
- Department of Dermatology, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Lin-Lang Guo
- Department of Pathology, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
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Yan JH, Luo DL, Zhang F, Chen Y, Luo XL, Xu J, Li Z, Liu YH. [ Clinicopathological features of fibrin-a ssociated diffuse large B cell lymphoma arising within concurrent atrial myxoma: report of six cases]. Zhonghua Bing Li Xue Za Zhi 2020; 49:1027-1030. [PMID: 32992417 DOI: 10.3760/cma.j.cn112151-20200302-00160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the clinicopathological features, treatment and prognosis of fibrin-associated diffuse large B cell lymphoma (DLBCL) arising within concurrent atrial myxoma. Methods: Six cases of fibrin-associated DLBCL arising within concurrent atrial myxoma diagnosed at the Department of Pathology, Guangdong General Hospital, from 2006 to 2019 were included. The histology, immunophenotype, treatment and prognoses were analyzed. Results: The patients' age ranged from 46 to 78 years (mean 59 years). There were 3 males and 3 females. The tumors were all discovered incidentally on histological examination of surgical pathology specimens excised for atrial myxoma. All patients appeared to have morphological features of DLBCL, B lineage immunophenotype, high proliferative index and latency type III of Epstein-Barr viral infection. They had complete tumor resections without adjuvant chemotherapy and were healthy at 5- to 120-month follow-ups. Conclusions: Fibrin-associated DLBCL arising within concurrent atrial myxoma is an unusual form of DLBCL associated with chronic inflammation, and its clinical outcome is indolent. The findings suggest that this type of lymphoma does not warrant excessive or unnecessary treatments after complete resection.
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Affiliation(s)
- J H Yan
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - D L Luo
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - F Zhang
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Y Chen
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - X L Luo
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - J Xu
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Z Li
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Y H Liu
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
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Yan LX, Liu YH, Li Z, Luo DL, Li YF, Yan JH, Zhang JT, Liu C, Liu XH, He J. Prognostic value of delta-like protein 3 combined with thyroid transcription factor-1 in small-cell lung cancer. Oncol Lett 2019; 18:2254-2261. [PMID: 31452726 PMCID: PMC6676644 DOI: 10.3892/ol.2019.10538] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 05/09/2018] [Accepted: 04/26/2019] [Indexed: 11/24/2022] Open
Abstract
Rovalpituzumab tesirine is a promising delta-like protein 3 (DLL3)-targeted antibody-drug conjugate for the treatment of small-cell lung cancer (SCLC). Thyroid transcription factor-1 (TTF-1) and DLL3 protein are associated with SCLC, and may be used to identify patients, who respond to the DLL3-targeted therapy. However, little is known about the expression pattern of the DLL3 protein, and the prognostic value of DLL3 and TTF-1 for SCLC. A total of 335 patients with SCLC were identified, including 11 patients with paired biopsy of primary site and lobectomy specimens, and 37 patients with paired specimens of primary and metastatic site. The DLL3 expression levels of individuals were evaluated using the anti-DLL3 antibody. No differences in DLL3 expression levels were observed in paired biopsy and lobectomy specimens (P=0.774), and paired primary and metastatic sites (P=0.472). SCLC cases with high DLL3 expression levels were more frequent in male patients (P=0.041), smokers (P=0.023) and patients with positive TTF-1 expression (P=0.006) compared with DLL3-low SCLC. DLL3-high SCLC exhibited worse overall survival compared with DLL3-low SCLC (log-rank test, P=0.007). Patients with TTF-1+ SCLC experienced a significantly worse overall survival compared with patients with TTF-1- SCLC (P<0.001). DLL3-low/TTF-1- was defined as a distinct molecular subgroup of SCLC with optimal prognosis (P<0.001). DLL3-low/TTF-1- was an independent prognostic marker for SCLC (P=0.001). In conclusion, the present study, to the best of our knowledge, provided novel evidence for SCLC intratumoral and intertumoral homogeneity with the identification of DLL3 protein levels. Therefore, it is reliable to use biopsy specimens to evaluate DLL3 expression levels for identification of patients who may benefit from DLL3-targeted therapy. In addition, DLL3 and TTF-1 are two protein markers with potential clinical value in risk stratification for patients with SCLC.
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Affiliation(s)
- Li-Xu Yan
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Yan-Hui Liu
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Zhi Li
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Dong-Lan Luo
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Yu-Fa Li
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Jing-Hai Yan
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Jia-Tao Zhang
- Guangdong Lung Cancer Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Chao Liu
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Xun-Hua Liu
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Jiao He
- Department of Pathology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
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Qian J, Luo DL, Zhang JE, Li WY, Gao XL, Fang XF, An H, Deng JL, Li Q, Wu J. Diagnostic and prognostic factors for patients with primary pulmonary non-Hodgkin's lymphoma: A 16-year single-center retrospective study. Oncol Lett 2019; 18:2082-2090. [PMID: 31423281 DOI: 10.3892/ol.2019.10469] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Accepted: 04/29/2019] [Indexed: 12/14/2022] Open
Abstract
Primary pulmonary non-Hodgkin's lymphoma (PP-NHL) is a rare entity with non-specific symptoms and radiographic findings, as well as a difficult preoperative diagnosis. A limited number of studies have described PP-NHL in Chinese patients. The goal of the present study was to improve early diagnosis by examining prognostic factors in patients with PP-NHL. Therefore, a total of 29 patients with PP-NHL were included in the study between January 2001 and June 2017, including 14 with aggressive-type and 15 with indolent-type lymphomas (10 male, 19 female; median age, 50.3 years; range, 19-87 years). Pulmonary nodules and masses (55.2%) were the most common radiographic features. The diagnostic yield was 80% (12/15) by endobronchial biopsy or transbronchial lung biopsy and 100% by computed tomography (CT)-guided percutaneous needle lung biopsy (11/11) or surgery (8/8). Elevated lactate dehydrogenase levels and systemic symptoms were observed considerably more often in patients with aggressive disease than in those with indolent disease. The 1-, 3- and 5-year overall survival (OS) rates were 42, 32, and 21%, respectively, for all patients, 72, 57 and 43%, respectively, for patients with indolent lymphomas, and 13, 6 and 0%, respectively, for patients with aggressive lymphomas. The median OS rate for all patients was 12.0 months; however, the OS rate for patients with aggressive lymphomas was significantly shorter compared with those with indolent lymphomas (7.1 months vs. 16.6 months; P=0.002). Aggressive vs. indolent lymphoma status was indicated to be an independent prognostic factor for poor 5-year OS rate (hazard ratio, 5.98; P=0.014). In conclusion, bronchoscopic and CT-guided percutaneous needle lung biopsies were the most useful and least invasive procedures for diagnosing PP-NHL. Furthermore, aggressive PP-NHL was highly associated with poor 5-year OS rate and a poor prognosis.
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Affiliation(s)
- Jiang Qian
- Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China.,Department of Oncology, Chizhou People's Hospital, Chizhou, Anhui 247100, P.R. China
| | - Dong-Lan Luo
- Department of Pathology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Jin-E Zhang
- Department of Radiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Wen-Yu Li
- Department of Lymphoma, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Xing-Lin Gao
- Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Xiang-Feng Fang
- Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Hong An
- Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Jun-Liang Deng
- Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Qiong Li
- Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
| | - Jian Wu
- Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong 510080, P.R. China
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Wei W, Cheng MN, Ba LJ, Zeng RX, Luo DL, Qin YH, Liu ZL, Kuang JF, Lu WJ, Chen JY, Su XG, Shan W. Pitaya HpWRKY3 Is Associated with Fruit Sugar Accumulation by Transcriptionally Modulating Sucrose Metabolic Genes HpINV2 and HpSuSy1. Int J Mol Sci 2019; 20:ijms20081890. [PMID: 30999552 PMCID: PMC6514986 DOI: 10.3390/ijms20081890] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 01/28/2023] Open
Abstract
Sugar level is an important determinant of fruit taste and consumer preferences. However, upstream regulators that control sugar accumulation during fruit maturation are poorly understood. In the present work, we found that glucose is the main sugar in mature pitaya (Hylocereus) fruit, followed by fructose and sucrose. Expression levels of two sucrose-hydrolyzing enzyme genes HpINV2 and HpSuSy1 obviously increased during fruit maturation, which were correlated well with the elevated accumulation of glucose and fructose. A WRKY transcription factor HpWRKY3 was further identified as the putative binding protein of the HpINV2 and HpSuSy1 promoters by yeast one-hybrid and gel mobility shift assays. HpWRKY3 was localized exclusively in the nucleus and possessed trans-activation ability. HpWRKY3 exhibited the similar expression pattern with HpINV2 and HpSuSy1. Finally, transient expression assays in tobacco leaves showed that HpWRKY3 activated the expressions of HpINV2 and HpSuSy1. Taken together, we propose that HpWRKY3 is associated with pitaya fruit sugar accumulation by activating the transcriptions of sucrose metabolic genes. Our findings thus shed light on the transcriptional mechanism that regulates the sugar accumulation during pitaya fruit quality formation.
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Affiliation(s)
- Wei Wei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Mei-Nv Cheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Liang-Jie Ba
- School of Food and Pharmaceutical Engineering, Guizhou Engineering Research Center for Fruit Processing, Guiyang University, Guiyang 550003, China.
| | - Run-Xi Zeng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Dong-Lan Luo
- School of Food and Pharmaceutical Engineering, Guizhou Engineering Research Center for Fruit Processing, Guiyang University, Guiyang 550003, China.
| | - Yong-Hua Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Zong-Li Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Jian-Fei Kuang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Wang-Jin Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Jian-Ye Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Xin-Guo Su
- Department of Food Science, Guangdong Food and Drug Vocational College, Guangzhou 510520, China.
| | - Wei Shan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
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Luo DL, Yan JH, Ge Y, Yan LX, Chen J, Xu J, Luo XL, Liu YH. [Diagnostic and prognostic implications of MAML2 gene translocation in primary pulmonary mucoepidermoid carcinoma]. Zhonghua Bing Li Xue Za Zhi 2019; 48:26-30. [PMID: 30641642 DOI: 10.3760/cma.j.issn.0529-5807.2019.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate MAML2 gene-translocation in primary pulmonary mucoepidermoid carcinoma (PMEC) and pulmanary adenosquamous carcinoma, and the optimal diagnostic immunohistiochemical (IHC) panel in distinguishing PMEC from adenosqumous carcinoma. Methods: Twenty-four cases of PMEC and 44 adenosqumous carcinoma diagnosed in the Guangdong General Hospital were tested for MAML2 translocation by fluorescent in-situ hybridization (FISH) using tissue array. An IHC panel including TTF1, Napsin A, CK5/6, p63, p40 and Ki-67 was performed on the cohort. The clinical data for all cases were collected and all PMEC patients had follow-up information. Results: The patients' age ranged form 6 to 73 years, with a median age of 32 years. The male to female ratio was 1.4∶1.0. MAML2 translocation was found in 16/24 (66.7%) cases of PMEC whereas all 44 cases adenosqumous carcinoma were negative for translocation. All the cases of the PMEC were negative for TTF1 and Napsin A but positive for CK5/6, p63 and p40 in the intermediate cells and epidermal-like cells. In most PMEC cases, the Ki-67 expression index was lower than 10%. In contrast, most cases of adenosqumous carcinomas expressed TTF1 and Napsin A in the adenomatous component and CK5/6, p63 and p40 in the squamous component, which expression pattern was different from that of PMEC. Based on IHC staining, 2 cases of highly invasive ALK-positive adenocarcinoma mimicing PMEC were also found in the study. Conclusions: MAML2 gene translocation can be detected in about two-third of PMEC. Translocation of MAML2 gene and lower morphology grading are associated with good prognosis. The combined use of IHC antibodies panel is helpful to distinguish PMEC from the adenosqumous carcinoma and adenocarcinoma mimicing PMEC.
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Affiliation(s)
- D L Luo
- Department of Pathology, Guangdong General Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
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Zhang F, Luo DL, Chen Y, He J, Yan JH, Luo LQ, Luo XL, Liu YH. [Pathological features of duodenal-type follicular lymphoma]. Zhonghua Bing Li Xue Za Zhi 2019; 48:22-25. [PMID: 30641641 DOI: 10.3760/cma.j.issn.0529-5807.2019.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the clinicopathological features, treatment and prognosis of duodenal-type follicular lymphoma. Methods: Four cases of duodenal-type follicular lymphoma diagnosed at Guangdong General Hospital from 2014 to 2015 with detailed clinical data were included. The histomorphology, immunophenotype, treatment and prognoses were analyzed. Results: The patients' age ranged from 51 to 57 years (mean 54 years), and there were 2 males and 2 females. The involved sites were gastric fundus in one case, second portion of the duodenum in two cases and terminal ileum in one case. All patients presented with multiple mucosal granules or nodules at endoscopy. Microscopically, there were multiple mucosal neoplastic follicles, constituting grade 1-2 disease based on nodal follicular lymphoma grading system. The tumor cells were positive for CD20, CD10, bcl-6 and bcl-2. CD21 highlighted the follicular dendritic meshwork mainly at the periphery of the follicles. Proliferation index was low. Three patients received rituximab monotherapy for 4 cycles, leading to complete remission. One patient refused therapy and the disease progressed to systemic lymphoma 15 months after the initial diagnosis. Conclusions: Duodenal-type follicular lymphoma is a special variant of follicular lymphoma with indolent clinical course. The tumor exhibits morphology of low grade follicular lymphoma with characteristic dendritic meshwork at the periphery of the follicles and a low proliferation index. Prognosis is excellent. Rituximab monotherapy is treatment of choice, but a small minority of patients may progress to systemic disease.
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Affiliation(s)
- F Zhang
- Department of Pathology, Guangdong General Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
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Yan LX, Liu YH, Luo DL, Zhang F, Cheng Y, Luo XL, Xu J, Cheng J, Zhuang HG. Correction: MYC Expression in Concert With BCL2 and BCL6 Expression Predicts Outcome in Chinese Patients With Diffuse Large B-Cell Lymphoma, Not Otherwise Specified. PLoS One 2018; 13:e0210027. [PMID: 30586419 PMCID: PMC6306192 DOI: 10.1371/journal.pone.0210027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Li L, Wang SX, Wu HM, Luo DL, Dong GF, Feng Y, Zhang X. Acquired hypophosphatemic osteomalacia is easily misdiagnosed or neglected by rheumatologists: A report of 9 cases. Exp Ther Med 2018; 15:5389-5393. [PMID: 29904418 DOI: 10.3892/etm.2018.6106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 05/11/2017] [Indexed: 12/23/2022] Open
Abstract
The aim of the present study was to assist rheumatologists in differentiating hypophosphatemic osteomalacia (HO) from mimic rheumatology diseases. Clinical data was obtained from 9 patients with acquired HO, initially misdiagnosed as mimic rheumatologic diseases. The data were retrospectively analyzed and a literature review was performed. The etiology of the cases was as follows: Adefovir dipivoxil-induced Fanconi syndrome was present in 6 of the cases, 2 were tumors and 1 case was chronic nephropathy. The chief complaint was thoracic or back pain and arthralgia, followed by progressive muscle weakness and dramatic movement limitation. All patients were transferred to 3-6 hospitals for extended periods due to misdiagnosis with conditions such as ankylosing spondylitis, chronic arthritis, lumbar disc disease, osteoporosis and somatoform disorder. Hypophosphatemia was observed in the patients and bone scans revealed diffusely decreased tracer uptake, with multiple hot spots of fractured sites and involved joints. Furthermore, patients' bone density was markedly low compared with the normal range for their age and sex. In the present study, 6 of the patients recovered when adefovir dipivoxil was stopped. In 1 case, hypophosphatemia was ameliorated following tumor resection. The remaining patients, 1 with sub-skull tumor and 1 with chronic kidney disease, had poor prognoses due to incurable diseases. In conclusion, diagnosing HO is challenging for rheumatologists and physicians. Basic examinations of electrolyte balance and bone mineral density should be performed, as should tumor screening and a careful collection of patient medical history and drugs in young patients with unexplained thoracic or back pain and muscle weakness. Removing any secondary etiology, such as drugs may dramatically improve the patients clinical manifestations and result in an improved prognosis.
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Affiliation(s)
- Ling Li
- Department of Rheumatology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Shu-Xia Wang
- Department of Nuclear Medicine, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Hong-Mei Wu
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Dong-Lan Luo
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Guang-Fu Dong
- Department of Rheumatology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Yuan Feng
- Department of Rheumatology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
| | - Xiao Zhang
- Department of Rheumatology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
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Zhang F, Luo DL, Chen Y, Wu HM, Yan JH, Luo XL, He J, Luo LQ, Liu YH. [Expression of βF1 and T cell receptor γ in T lymphoblastic lymphoma/leukemia]. Zhonghua Bing Li Xue Za Zhi 2018; 47:119-122. [PMID: 29429164 DOI: 10.3760/cma.j.issn.0529-5807.2018.02.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the expression of βF1 and T cell receptor (TCR)γ in T lymphoblastic lymphoma/leukemia(T-LBL/ALL), and investigate the clinicopathological features. Methods: Fifty-one cases of T-LBL/ALL were collected at Guangdong General Hospital from 2010 to 2016, the expression of βF1 and TCRγ was assessed by immunohistochemistry. Results: There were 13 cases of children and adolescents, and 38 cases of adults. The expression rates of βF1 and TCRγ were 27.5%(14/51) and 15.7%(8/51) respectively. The proportion of adults in αβ T-LBL/ALL, TCR-silent T-LBL/ALL and γδ T-LBL/ALL was 7/14, 79.3%(23/29)and 8/8 respectively, and the difference was significant (P=0.023). There was no statistical difference in sex, LDH, bone marrow involvement and Ann arbor stage among these three groups(P>0.05). γδ T-LBL/ALLs included 6 cases of CD4(-)/CD8(-) phenotype, whereas αβ T-LBL/ALL included 7 cases of CD4(+) /CD8(+) phenotype. There was significant difference in CD4/CD8 expression among these three groups(P<0.01). Conclusions: γδ T-LBL/ALL occurred only in adults, with predominantly CD4(-)/CD8(-) phenotype. αβ T-LBL/ALL occurred more common in children and adolescents, with predominantly CD4(+) /CD8(+) phenotype.
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Affiliation(s)
- F Zhang
- Department of Pathology, Guangdong General Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
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Luo DL, Zhang CJ, Huang YG, Huang T, Li HZ. [Serum uric acid is associated with disease severity and an important predictor for clinical outcome in patients with pulmonary hypertension]. Zhonghua Xin Xue Guan Bing Za Zhi 2017. [PMID: 28648026 DOI: 10.3760/cma.j.issn.0253-3758.2017.06.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: The growing body of literature showed a link between uric acid and pulmonary hypertension (PH), but the impact of hyperuremia on outcome of patients with PH has not been well defined. Therefore, the present study was performed to analyze the impact of uric acid on outcome of PH patients. Methods: One hundred seventy-three PH patients (112 females, mean age 38 years old), who were hospitalized in our department between January 2010 and December 2015, were included in our study, the PH diagnosis was made based on right heart catheterization examination result (mean pulmonary artery pressure≥25 mmHg(1 mmHg=0.133 kPa)). PH patients were divided into mild to moderate PH group (Rp/Rs≤0.6, n=97) and severe PH group (Rp/Rs>0.6, n=76). Fifty-one patients (33 females, mean age 45 years old) without PH based on right heart catheterization were included as control subjects. All participants were followed up for a median of 24 months(6-71 months). Clinical endpoints were defined as cardiogenic death or heart-and-lung transplantation. Results: Uric acid was positively correlated with pulmonary vascular resistance(r=0.398, P<0.01), systemic vascular resistance(r=0.244, P<0.01) and mean right atrial pressure (r=0.26, P<0.01), and was negatively correlated with cardiac index(r=-0.278, P<0.01)and mixed venous oxygen saturation (r=-0.322, P<0.01)in PH patients. Serum uric acid level was significantly higher in patients with severe PH than in patients with mild-to-moderate PH and the control subjects (both P<0.05). According to the receiver operating characteristic curve (ROC), 425.5 μmol/L was found to be the best cut-off value of serum uric acid level to predict the outcome of PH patients (sensitivity 50%, specificity 72%). During follow-up, patients with higher level of uric acid (>425.5 μmol/L) were linked with poorer clinical outcome compared to patients with uric acid <425.5 μmol/L(P=0.027). Conclusion: Our findings suggests that uric acid is associated with the severity of PH and higher uric acid level serves as an important predictor for poor clinical outcome of PH patients.
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Affiliation(s)
- D L Luo
- Department of Cardiology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Cardiovascular Institute, Guangzhou 510000, China
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Luo DL, Ba LJ, Shan W, Kuang JF, Lu WJ, Chen JY. Involvement of WRKY Transcription Factors in Abscisic-Acid-Induced Cold Tolerance of Banana Fruit. J Agric Food Chem 2017; 65:3627-3635. [PMID: 28445050 DOI: 10.1021/acs.jafc.7b00915] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Phytohormone abscisic acid (ABA) and plant-specific WRKY transcription factors (TFs) have been implicated to play important roles in various stress responses. The involvement of WRKY TFs in ABA-mediated cold tolerance of economical fruits, such as banana fruit, however remains largely unknown. Here, we reported that ABA application could induce expressions of ABA biosynthesis-related genes MaNCED1 and MaNCED2, increase endogenous ABA contents, and thereby enhance cold tolerance in banana fruit. Four banana fruit WRKY TFs, designated as MaWRKY31, MaWRKY33, MaWRKY60, and MaWRKY71, were identified and characterized. All four of these MaWRKYs were nuclear-localized and displayed transactivation activities. Their expressions were induced by ABA treatment during cold storage. More importantly, the gel mobility shift assay and transient expression analysis revealed that MaWRKY31, MaWRKY33, MaWRKY60, and MaWRKY71 directly bound to the W-box elements in MaNCED1 and MaNCED2 promoters and activated their expressions. Taken together, our findings demonstrate that banana fruit WRKY TFs are involved in ABA-induced cold tolerance by, at least in part, increasing ABA levels via directly activating NECD expressions.
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Affiliation(s)
- Dong-Lan Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University , Guangzhou, 510642, People's Republic of China
- School of Food and Pharmaceutical Engineering/Guizhou Engineering Research Center for Fruit Processing, Guiyang College , Guiyang, 550003, People's Republic of China
| | - Liang-Jie Ba
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University , Guangzhou, 510642, People's Republic of China
- School of Food and Pharmaceutical Engineering/Guizhou Engineering Research Center for Fruit Processing, Guiyang College , Guiyang, 550003, People's Republic of China
| | - Wei Shan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University , Guangzhou, 510642, People's Republic of China
| | - Jian-Fei Kuang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University , Guangzhou, 510642, People's Republic of China
| | - Wang-Jin Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University , Guangzhou, 510642, People's Republic of China
| | - Jian-Ye Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University , Guangzhou, 510642, People's Republic of China
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Wang SY, Chen G, Luo DL, Shao D, Liu ET, Sun T, Wang SX. 18F-FDG PET/CT and contrast-enhanced CT findings of pulmonary cryptococcosis. Eur J Radiol 2017; 89:140-148. [PMID: 28267531 DOI: 10.1016/j.ejrad.2017.02.008] [Citation(s) in RCA: 21] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 01/31/2017] [Accepted: 02/01/2017] [Indexed: 12/15/2022]
Abstract
PURPOSE Pulmonary cryptococcosis is an uncommon cause of pulmonary nodules in non-AIDS patients. This study reports the 18F-fluorodeoxyglucose-positron emission tomography (18F-FDG PET/CT) and contrast-enhanced CT (CE-CT) findings of 42 patients with pulmonary cryptococcosis. MATERIALS AND METHODS A retrospective review of the 18F-FDG PET/CT and CE-CT findings of 42 patients with histologically proven pulmonary cryptococcosis was conducted. All patients underwent PET/CT and CE-CT in the same session. The CT diagnosis was based on the location, morphological features, and enhancement of lesions. The PET/CT findings were recorded, and clinical data and surgical and histopathological findings were collected. RESULTS The results of the PET scans revealed that 37 (88%) of 42 patients showed higher FDG uptake, and 5 (12%) patients demonstrated lower FDG uptake than the mediastinal blood pool. The maximum standardized uptake value (SUV) of pulmonary cryptococcosis ranged from 1.4 to 13.0 (average: 5.7±3.3, median 4.9). A single nodular pattern was the most prevalent pattern observed and was found in 29 (69%) patients. This pattern was followed by scattered nodular (n=4, 10%), clustered nodular (n=3, 7%), mass-like (n=3, 7%), and bronchopneumonic (n=3, 7%) patterns. The most frequent pattern of immunocompetent patients was the single nodular pattern (29 of 33, 88%). Immunocompromised patients most frequently pattern exhibited mass-like (3 of 9, 33%) and bronchopneumonic (3 of 9, 33%) patterns. CONCLUSION Pulmonary cryptococcosis most commonly appears as single nodules in immunocompetent patients. Mass-like and bronchopneumonic patterns were common in immunocompromised patients. In 88% of patients, lung lesions showed high FDG uptake, thus mimicking a possible malignant condition.
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Affiliation(s)
- Si-Yun Wang
- Department of PET Center, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, PR China.
| | - Gang Chen
- Department of Thoracic Surgery, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, PR China.
| | - Dong-Lan Luo
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, PR China.
| | - Dan Shao
- Department of PET Center, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, PR China.
| | - En-Tao Liu
- Department of PET Center, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, PR China.
| | - Taotao Sun
- Department of PET Center, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, PR China.
| | - Shu-Xia Wang
- Department of PET Center, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, PR China.
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Xu FP, Liu YH, Luo XL, Zhang F, Zhou HY, Ge Y, Liu C, Chen J, Luo DL, Yan LX, Mei P, Xu J, Zhuang HG. Overexpression of SRC-3 promotes esophageal squamous cell carcinoma aggressiveness by enhancing cell growth and invasiveness. Cancer Med 2016; 5:3500-3511. [PMID: 27781415 PMCID: PMC5224859 DOI: 10.1002/cam4.884] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 08/02/2016] [Accepted: 08/04/2016] [Indexed: 02/06/2023] Open
Abstract
Steroid receptor coactivator‐3 (SRC‐3), a transcriptional coactivator for nuclear receptors and other transcription factors, plays an important role in the genesis and progression of several cancers. However, studies investigated the role of SRC‐3 in esophageal squamous cell carcinomas (ESCCs) are limited, and the role of SRC‐3 in tumor progression remains unclear. We examined the expression of SRC‐3 in 8 ESCC cell lines and 302 human ESCC tissues by qPCR, Western blot, and immunohistochemistry. In addition, ESCC cell lines were subjected to proliferation and invasion assays, tumorigenicity assay, flow cytometry assay, qPCR, Western blot, and Chromatin Immunoprecipitation assay to investigate the role of SRC‐3 in cancer progression. SRC‐3 was overexpressed in 48% of cases and correlated with poor overall (P = 0.0076) and progression‐free (P = 0.0069) survival of surgically resected ESCC patient. Cox regression analysis revealed that SRC‐3 is an independent prognostic marker. Furthermore, we found that activation of insulin‐like growth factor (IGF)/AKT) was involved in the SRC‐3 on the cell growth and invasiveness in two ESCC cell lines, Eca109 and EC18 cells. SRC‐3 overexpression is clinically and functionally relevant to the progression of human ESCC, and might be a useful molecular target for ESCC prognosis and treatment.
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Affiliation(s)
- Fang-Ping Xu
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yan-Hui Liu
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Xin-Lan Luo
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Fen Zhang
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Hai-Yu Zhou
- Department of Thoracic Surgery, Cancer Center, Guangdong General Hospital, Guangzhou, China
| | - Yan Ge
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Chao Liu
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jie Chen
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Dong-Lan Luo
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Li-Xu Yan
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Ping Mei
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jie Xu
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Heng-Guo Zhuang
- Department of Pathology and Laboratory Medicine, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, China
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Luo XL, Liu XF, He J, Luo DL, Liu YH. [Correlation between immunohistochemical staining conditions and results of anaplastic lymphoma kinase expression]. Zhonghua Bing Li Xue Za Zhi 2016; 45:337-340. [PMID: 27142919 DOI: 10.3760/cma.j.issn.0529-5807.2016.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Yan LX, Liu YH, Xiang JW, Wu QN, Xu LB, Luo XL, Zhu XL, Liu C, Xu FP, Luo DL, Mei P, Xu J, Zhang KP, Chen J. PIK3R1 targeting by miR-21 suppresses tumor cell migration and invasion by reducing PI3K/AKT signaling and reversing EMT, and predicts clinical outcome of breast cancer. Int J Oncol 2015; 48:471-84. [PMID: 26676464 PMCID: PMC4725461 DOI: 10.3892/ijo.2015.3287] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 11/22/2015] [Indexed: 01/06/2023] Open
Abstract
We have previously shown that dysregulation of miR-21 functioned as an oncomiR in breast cancer. The aim of the present study was to elucidate the mechanisms by which miR-21 regulate breast tumor migration and invasion. We applied pathway analysis on genome microarray data and target-predicting algorithms for miR-21 target screening, and used luciferase reporting assay to confirm the direct target. Thereafter, we investigated the function of the target gene phosphoinositide-3-kinase, regulatory subunit 1 (α) (PIK3R1), and detected PIK3R1 coding protein (p85α) by immunohistochemistry and miR-21 by RT-qPCR on 320 archival paraffin-embedded tissues of breast cancer to evaluate the correlation of their expression with prognosis. First, we found that PIK3R1 suppressed growth, invasiveness, and metastatic properties of breast cancer cells. Next, we identified the PIK3R1 as a direct target of miR-21 and showed that it was negatively regulated by miR-21. Furthermore, we demonstrated that p85α overexpression phenocopied the suppression effects of antimiR-21 on breast cancer cell growth, migration and invasion, indicating its tumor suppressor role in breast cancer. On the contrary, PIK3R1 knockdown abrogated antimiR‑21-induced effect on breast cancer cells. Notably, antimiR-21 induction increased p85α, accompanied by decreased p-AKT level. Besides, antimiR-21/PIK3R1-induced suppression of invasiveness in breast cancer cells was mediated by reversing epithelial-mesenchymal transition (EMT). p85α downregulation was found in 25 (7.8%) of the 320 breast cancer patients, and was associated with inferior 5-year disease-free survival (DFS) and overall survival (OS). Taken together, we provide novel evidence that miR-21 knockdown suppresses cell growth, migration and invasion partly by inhibiting PI3K/AKT activation via direct targeting PIK3R1 and reversing EMT in breast cancer. p85α downregulation defined a specific subgroup of breast cancer with shorter 5-year DFS and OS, which may require more aggressive treatment.
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Affiliation(s)
- Li-Xu Yan
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Yan-Hui Liu
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Jian-Wen Xiang
- Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, Guangdong, P.R. China
| | - Qi-Nian Wu
- The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P.R. China
| | - Lei-Bo Xu
- Sun Yat-sen Memorial Hospital, SunYat-sen University, Guangzhou, Guangdong, P.R. China
| | - Xin-Lan Luo
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Xiao-Lan Zhu
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Chao Liu
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Fang-Ping Xu
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Dong-Lan Luo
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Ping Mei
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Jie Xu
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Ke-Ping Zhang
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
| | - Jie Chen
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou, Guangdong, P.R. China
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Zhang F, Yan LX, Lin SX, Ye ZY, Zhuang HG, Yun JP, Lin HL, Luo DL, Xu FP, Luo XL, Cheng J, Zhang KP, Liu YH. Immunophenotypic features and t(14;18) (q32;q21) translocation of Chinese follicular lymphomas helps to distinguish subgroups. Diagn Pathol 2013; 8:154. [PMID: 24047469 PMCID: PMC3853627 DOI: 10.1186/1746-1596-8-154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Accepted: 09/09/2013] [Indexed: 12/29/2022] Open
Abstract
Background The revised 2008 World Health Organization classification maintains a histological grading system (grades 1–3) for follicular lymphoma (FL). The value of grading FL has been debated. This study will yield deeper insights into the morphologic, immunophenotypic characterization and t(14;18) translocation in FL and explore their significance of diagnosis of Chinese FL subgroups. Methods We retrospectively reviewed the FL diagnoses according to the 2008 WHO classification in all diagnostic specimens from a multicentric cohort of 122 Chinese patients. Upon review, 115 cases proved to be truly FL. CD10, BCL6, MUM1, BCL2 and t(14;18) (q32;q21) translocation were detected by Envision immunostaining technique and fluorescence in situ hybridization. Results FL1 has larger proportion of follicular pattern (93.0%) than that of FL2 (73.7%, P = 0.036), FL3B (63.6%, P = 0.003) and FL3A (77.4%, P = 0.053), although the last P value was more than 0.05 (Pearson’s chi-squared test). Areas of DLBCL were present in 25.8% (8/31) of FL3A and more frequent in FL3B (59.1%, 13/22; P = 0.015). The positivity of CD10 and BCL2 in FL1-2 were significantly higher than those in FL3 (P < 0.001, P = 0.043, respectively). The positivity of MUM1 in FL1-2 was significantly lower than that in FL3 (10.2% vs. 51.0%; P < 0.001). Furthermore the positivity of MUM1 in FL3A was significantly lower than that in FL3B (37.9% vs. 68.2%; P = 0.032). The positivity of t(14;18) was higher in FL1-2 than in FL3 (73.5% vs. 35.6%, P < 0.001), and was higher in FL3A than in FL3B (51.9% vs. 11.1%, P = 0.005). t(14;18) was significantly correlated with CD10+ (R = 0.453, P < 0.001) and MUM1+ (R = -0.482, P < 0.001). Conclusions FL1 and FL2 were immunophenotypically and genomically similar, while FL3A and FL3B were partly immunophenotypically similar but morphologically, genomically distinct. FL3A was genomically closer to FL1-2, whereas FL3A was genomically closer DLBCL. Thus we hypothesize that FL may in fact be a heterogeneous indolent lymphoma encompassing entities with distinct molecular pathogenesis and genetic characteristics. Immunohistochemical and genetic characterization helps to distinguish subgroups of FLs. Virtual slides The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1334018129864616.
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Affiliation(s)
- Fen Zhang
- Department of Pathology, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangzhou 510080, China.
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Chen HJ, Yang JJ, Xu CR, Lei YY, Luo DL, Yan HH, Wu YL. Principles of biopsy in suspected lung cancer: priority still based on invasion in the era of targeted therapy? J Thorac Dis 2013; 5:E93-7. [PMID: 23825792 DOI: 10.3978/j.issn.2072-1439.2013.04.17] [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] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 04/24/2013] [Indexed: 11/14/2022]
Abstract
There are multiple ways to obtain a biopsy for patients with suspected lung cancer under clinical circumstances. Diagnostic goals described previously in literature should be achieved preferably by using the safest, least invasive, and least costly biopsies. Insight into molecular profile and era of targeted therapy challenged the previous concepts on tumor biopsy. Distinct principles of biopsy should be revisited to adopt the advances in clinical research. A 53-year-old gentleman with 10-year history of dust exposure consulted to our hospital because of bloody sputum. PET/CT scanning revealed a 3.2-centimeter mass with an increased (18)F-FDG uptake in right upper lung lobe, metabolically active lesions in multiple stations of mediastinal or bilateral hilar lymph nodes and an intramuscular nodule in the left gluteus maximus. He underwent transthoracic core needle biopsy of the lung mass, resection of intramuscular nodule, bronchoscopy and right upper lung lobectomy in sequence. The final diagnosis was considered as systemic lipid deposition. Principles of biopsy in suspected lung cancer should be prioritized in sequence based on weight in clinical management, acquisition of tissue, invasion, efficiency and cost.
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Affiliation(s)
- Hua-Jun Chen
- Guangdong Lung Cancer Institute, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou 510080, P. R. China
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Abstract
Selective internal radiation therapy is a relatively new technique that irradiates primary and metastatic liver cancer using yttrium 90 microspheres. Increasing reports have shown this to be a useful treatment for unresectable primary hepatocellular carcinoma and others metastases from colon, lung, breast, sarcoma, and ocular melanoma. On the other hand, more and more therapy-related complications have been described. Since the morphologic description of injured organs are relatively uncommon, we report 2 cases of selective internal radiation therapy–related gastric injury, which represent basophilic round bodies in gastric biopsies little known by pathologists. The appearances in esophagogastroduodenoscopy include gastrointestinal ulcer, edema, and bleeding. Histological findings are mucosal atrophy, mild to moderate cytologic atypia, edema of the stroma, and inflammatory infiltration. The most characteristic feature is the presence of round blue and dark microspheres in the stromal blood vessels.
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Affiliation(s)
- Dong-Lan Luo
- Guangdong General Hospital/Guangdong Academy of Medical Sciences, Guangzhou, China
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Ye HY, Chen JG, Luo DL, Jiang ZM, Chen ZH. Perivascular epithelioid cell tumor (PEComa) of gynecologic origin: a clinicopathological study of three cases. EUR J GYNAECOL ONCOL 2012; 33:105-108. [PMID: 22439417] [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: 05/31/2023]
Abstract
Perivascular epithelioid cell tumors (PEComas), occasionally associated with the tuberous sclerosis complex, are characterized by varying amounts of spindle and epithelioid cells with clear to eosinophilic cytoplasm that display immunoreactivity for melanocytic markers, most frequently HMB-45. Perivascular epithelioid cell tumor of gynecologic origin is very rare, and there have been only a few reported cases. This study describes the clinical, histological, and immunohistochemical features and prognoses of three cases of gynecologic origin. Two of the three tumors were confined to the uterus and one to the vagina. None of the patients had tuberous sclerosis complex. Immunohistochemistry indicated that all three cases expressed at least one melanocytic marker, and HMB45 was a positive marker for all of them. These markers can be found in both epithelial cells and spindle cells. Except for MiTF, which was located in the nucleus, all the other antibodies were located in the cytoplasm. The three cases have been followed up for 26, 22, and three months, respectively, with disease-free survival in all cases. We conclude that PEComas of gynecologic origin have morphological and immunohistochemical features of the PEComa family, which are rare and should be included in the differential diagnosis with other tumors. Until more cases of this rare tumor are evaluated with longer follow-up, firm criteria for malignancy remain uncertain.
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Affiliation(s)
- H Y Ye
- Department of Gynecology and Obstetrics, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China.
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Luo DL, Liu YH, Zhuang HG, Li L, Xu FP, Zhang F, Luo XL, Xu J. [Immunophenotypes and prognosis of diffuse large B-cell lymphoma: a study of 500 cases]. Zhonghua Bing Li Xue Za Zhi 2011; 40:235-239. [PMID: 21615996] [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: 05/30/2023]
Abstract
OBJECTIVE To study the immunophenotype and overall survival of diffuse large B-cell lymphoma (DLBCL) classified according to the 2008 World Health Organization classification of tumors of hematopoietic and lymphoid tissues. METHODS Five hundred cases of DLBCL were retrospectively analyzed with histologic review, immunohistochemistry, gene rearrangement study, in situ hybridization and fluorescence in situ hybridization. Follow-up data were collected. The overall survival rates of germinal center B-cell (GCB) and non-germinal center B-cell (non-GCB) subtypes, as well as those of DLBCL, not otherwise specified (NOS) and Epstein-Barr virus (EBV)-positive DLBCL of the elderly, were compared. RESULTS DLBCL-NOS was the commonest subtype which accounted for 77.2% (386/500) of the cases. EBV-positive DLBCL of the elderly, primary DLBCL of central nervous system, primary mediastinal (thymic) large B-cell lymphoma and T cell/histiocyte-rich large B-cell lymphoma accounted for 9.4% (47/500), 4.4% (22/500), 2.8% (14/500) and 2.6% (13/500), respectively. 68.5% (219/320) of DLBCL-NOS belonged to non-GCB subtype. The percentage of GCB subtype and CD5-positive subtype were 28.4% (91/320) and 3.1% (10/320), respectively. Comparison of the overall survival, GCB and non-GCB immunophenotypic groups have no significant difference (P = 0.93). And the same result in which of the EBV-positive DLBCL of the elderly and DLBCL-NOS group, before and after age matched (P = 0.13 and 0.28, respectively). A double-hit lymphoma was found by FISH detection, which presenting as gray zone lymphoma in morphology. CONCLUSIONS By using Hans algorithm, GCB and non-GCB subtypes show no significant difference in overall survival. EBV-positive DLBCL of the elderly and DLBCL-NOS also do not have significant difference in overall survival. Fluorescence in situ hybridization technique is helpful in identification of DLBCL with rare phenotypes.
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Affiliation(s)
- Dong-Lan Luo
- Department of Pathology and Medical Laboratory, Guangdong General Hospital and Guangdong Academy of Medical Science, Guangzhou 510080, China
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Zhong WZ, Wu YL, Yang XN, Guo AL, Su J, Zhang XC, Luo DL, Wang Z, Chen HJ, Zhou Q, Xu CR, Qiao GB, Liao RQ, Yang JJ, Mok TS. Genetic evolution of epidermal growth factor receptor in adenocarcinoma with a bronchioloalveolar carcinoma component. Clin Lung Cancer 2010; 11:160-8. [PMID: 20439191 DOI: 10.3816/clc.2010.n.020] [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: 02/02/2023]
Abstract
BACKGROUND Epidermal growth factor receptor (EGFR) mutations may accumulate during the multistage progression of bronchioloalveolar carcinoma (BAC), leading to heterogeneity within the tumor. This study sought to determine whether metachronous adenocarcinomas with a BAC component emerging in the lung field arise from a single or multiple clones in the same individual. MATERIALS AND METHODS Samples of adenocarcinomas exhibiting various degrees of BAC were obtained by thoracotomy. Sequential specimens were obtained upon detection of metachronous lesions in the lung field. Genomic DNA was extracted from specimens, and the presence of activating mutations in EGFR was determined via direct sequencing. Our pathologic findings, sequential image information, and genetic data were compared to track evidence of cancer evolution. RESULTS Based on EGFR gene analyses of tumor specimens from 431 patients, 17 cases of sequential BAC-related adenocarcinomas, obtained by thoracotomy, were noteworthy. Upon alteration of the BAC/adenocarcinoma components, the EGFR tyrosine kinase inhibitor-untreated series, which had at least one episode of an EGFR-activating mutation, represented 3 potential hypotheses: no significant EGFR evolution for a single clone, genetic alterations from mutant to wild-type EGFR for multifocal lesions, or a switch from wild-type to mutant EGFR, leading to indeterminable cancer progression. CONCLUSION Genetic analysis, in conjunction with pathologic and radiologic diagnoses, can be used to explore the origin of multifocal BAC. The single-clone model indicates subsequent disease progression, whereas genetic alterations from mutations to wild-type EGFR are suggestive of second primary carcinoma. In cases when additional lesions emerge after the radical resection of BAC-related lung cancer, sequential tumor samples should be obtained for further evaluation.
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Affiliation(s)
- Wen-Zhao Zhong
- Guangdong Lung Cancer Institute, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou, China
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Liu YH, Xu FP, Rao JY, Zhuang HG, Luo XL, Li L, Luo DL, Zhang F, Xu J. Justification of the change from 10% to 30% for the immunohistochemical HER2 Scoring criterion in breast cancer. Am J Clin Pathol 2009; 132:74-9. [PMID: 19864236 DOI: 10.1309/ajcpg3lcvkpnfj6r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
We compared the American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) immunohistochemical scoring criterion (30%) for determining HER2 status and the Food and Drug Administration criterion (10%) with fluorescence in situ hybridization (FISH), the HER2 gene amplification method in 328 cases of breast cancer. Of 294 tumor samples successfully analyzed simultaneously by FISH and immunohistochemically, 178 of 196 cases scored 3+ using the 10% and the 30% criteria. Using FISH as the reference, the number of false-positives was reduced from 24 to 9 after application of the 30% criterion. The specificity of immunohistochemical analysis was higher with the 30% (92.0%) vs the 10% (78.8%) criterion. The kappa coefficient between FISH and immunohistochemical analysis was increased to 0.850 (almost perfect agreement; P < .001) after application of the 30% criterion vs 0.757 (substantial agreement) for the 10% criterion; the false-positive rate decreased to 5.1% from 12.2%. The chi(2) test showed that immunohistochemical analysis had significantly higher accuracy with the 30% (94.9%) vs the 10% (87.8%; P = .014) criterion. Our results from a large series of Chinese patients with breast cancer support that the ASCO/CAP 30% criterion may offer better results for assessing HER2 status.
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Affiliation(s)
- Yan-Hui Liu
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
| | - Fang-Ping Xu
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
| | | | - Heng-Guo Zhuang
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
| | - Xin-Lan Luo
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
| | - Li Li
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
| | - Dong-Lan Luo
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
| | - Fen Zhang
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
| | - Jie Xu
- Departments of Pathology and Laboratory Medicine, Guangdong General Hospital, Guangzhou, China
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Liu YH, Xu FP, Zhuang HG, Lai KCC, Xie D, Luo DL, Li L, Luo XL, Xu J, Zhang MH, Zhang F, Li HM. Clinicopathologic significance of immunophenotypic profiles related to germinal center and activation B-cell differentiation in diffuse large B-cell lymphoma from Chinese patients. Hum Pathol 2008; 39:875-84. [DOI: 10.1016/j.humpath.2007.10.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2007] [Revised: 10/15/2007] [Accepted: 10/17/2007] [Indexed: 10/22/2022]
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Liu YH, Li L, Liu G, Zhuang HG, Luo DL, Luo XL, Xu J. [Gene expression profiling of diffuse large B-cell lymphoma in China]. Zhonghua Bing Li Xue Za Zhi 2007; 36:79-83. [PMID: 17493379] [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: 05/15/2023]
Abstract
OBJECTIVE Gene expression profiling of diffuse large B-cell lymphoma (DLBCL) of different immunophenotypes. METHODS The study included 156 cases of DLBCL, which were subclassified by immunohistochemistry including CD10, bcl-6 and MUM1. Affymetrix U133 plus2.0 oligonucleotide microarrays were used to obtain differential gene expression profiling of 9 DLBCL (3 representative cases from each immunophenotypical group) and 3 tonsils. Clinical stages of all 9 lymphomas were Ann Arbor stage IV. RESULTS The immunohistochemistry subclassified 156 cases of DLBCL into 3 groups: CD10(+) and/or bcl-6(+), MUM1(-) (group 1); CD10(+) and/or bcl-6(+), MUM1(+) (group 2); CD10(-) and bcl-6(-), MUM1(+) (group 3). By gene expression array, 9 lymphomas and 3 tonsils were clustered in an unsupervised fashion into 4 groups (A, B, C and D), which were in accordance with the immunophenotypical groups (group 1, 2, 3 and normal). A total of 81 genes were markedly decreased and 86 genes were over-expressed in all DLBCL groups. Although Group B lymphomas showed mixed immunophenotypical features of both germinal center B-cell-like DLBCL (Group A) and activated B-cell-like lymphomas (Group C), gene profile clustering showed that Group B was dissimilar to Group A or Group C, with 45 over-expressed and 27 uniquely expressed genes. CONCLUSIONS Gene expression profiling indicates that DLBCL can be subgrouped at the molecular level and can be identified by immunophenotyping. The gene expression profile of Group B lymphomas suggests that factors other than the cell-of-origin may contribute to the pathogenesis of DLBCL.
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Affiliation(s)
- Yan-Hui Liu
- Department of Pathology and Laboratory Medicine, Guangdong Provincial People's Hospital, Guangzhou 510080, China.
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Abstract
A series of magnesium sulphate phosphors MgSO4:RE3+,X ( RE = Dy, Tm, Eu and X = P, Mn) have been prepared and studied. Based on the experimental results of thermoluminescence (TL) emission spectra and dose responses studies, it is proposed that in these phosphors large defect complexes are formed, which include intrinsic imperfections and dopants. These defect complexes were formed in the course of preparation of phosphors and could be regarded as basic elements in the TL multi-stage processes. This defect model might be applicable to the most of TL materials.
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Affiliation(s)
- D L Luo
- Department of Physics, Zhongshan University, Guangzhou 510275, China
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Abstract
The thermoluminescence (TL) and optically stimulated luminescence (OSL) of SrSO4:Eu (0.1 mol%) powder sample were studied. The TL and OSL emission spectrum are measured after irradiation (absorbed dose 100 Gy) of 90Sr source; both of them showed that the emission wavelength is at approximately 375 nm, which indicates that TL and OSL have the same luminescence centres, and the luminescence comes from transitions between the energy levels of Eu2+. The TL glow curves and OSL decay curves illustrate that there is only one main TL peak but two main components in OSL curves. By a comparative study of TL and OSL it is concluded that OSL traps are different from TL traps. The TL and OSL dose responses of SrSO4:Eu phosphor were measured, and it showed that phosphor has similar dose responses for OSL and TL.
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Affiliation(s)
- Q Tang
- Department of Physics, Zhongshan University, Guangzhou 510275, People's Republic of China.
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Zhang CX, Tang Q, Lin LB, Luo DL. Thermoluminescence glow curves and optical stimulated luminescence of undoped alpha-Al2O3 crystals. Radiat Prot Dosimetry 2006; 119:402-7. [PMID: 16644982 DOI: 10.1093/rpd/nci579] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The characteristics of thermoluminescence (TL) and optical stimulated luminescence (OSL) in undoped alpha-Al2O3 single crystals were studied. The TL glow curves of the crystal samples irradiated at various dose levels were measured by RisØ TL/OSL-DA-15B/C reader with U-340 or 7-59 filters at different heating rates. The glow peaks measured with U-340 at approximately 210 degrees C of the undoped alpha-Al2O3 can be well fitted by first-order kinetic equation whereas the glow peaks measured with 7-59 filters are a composite of two first-order glow peaks. It indicates that the TL glow curves are dependent upon the filter used in the reader that is related to the emission spectra of luminescence materials. The OSL were also measured and fitted by two exponential functions to get the luminescence intensities. The TL and OSL dose responses of the undoped alpha-Al2O3 crystal were obtained in the dose range of 0.12-248 Gy and fitted by the composite action dose-response function to get nonlinear characteristic parameters. The TL and OSL dose responses are linear-sublinear.
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Affiliation(s)
- C X Zhang
- Department of physics, Zhongshan University, Guangzhou 510275, China.
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Abstract
CaSO4:Eu, MgSO4:Eu and MgSO4:Eu,P phosphors have been prepared and their thermoluminescence (TL) characteristics were studied. A main glow peak due to Eu2+ ions is seen at approximately 146 degrees C and 440 nm and glow peaks at approximately 145 degrees C, approximately 190 degrees C, approximately 260 degrees C and approximately 360 degrees C for 590 nm and 625 nm wavelengths are identified as Eu3+ ion emissions in MgSO4:Eu. Emission spectra in MgSO4:Eu and the MgSO4:Eu,P show that the MgSO4:Eu3+ glow peak at 260 degrees C for 590 nm and 625 nm shifts to 280 degrees C with enhanced intensity while the Eu2+ ion glow peak at 146 degrees C remains but with reduced intensity. The main glow peak at approximately 146 degrees C and 440 nm from Eu2+ ions shows significant difference from the characteristic glow peaks of Eu3+ ions. It is observed that the wavelength of the Eu2+ ion glow peak is inversely proportional to the radius of the cation of the host sulphate in alkaline-earth sulphate phosphors. By contrast the wavelengths of the Eu3+ ion glow peaks remain unchanged in different sulphates. Besides, the glow curve at approximately 146 degrees C obtained using a conventional blue sensitive reader shows simply the first order kinetics. It is concluded that the luminescence centres and distribution of traps related to Eu2+ ions are different from that of Eu3+ ions in MgSO4:Eu and MgSO4:Eu,P phosphors.
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Affiliation(s)
- C X Zhang
- Department of Physics, Zhongshan University, Guangzhou, PR China.
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Abstract
Thermoluminescence (TL) dose responses to gamma radiation in the dose range from 0.1 Gy to 20 kGy in MgSO4:Dy, MgSO4:Dy,Mn, MgSO4:Dy,P and MgSO4:Dy,P,Cu phosphors were obtained and fitted by the composite action dose response function to obtain non-linear characteristic parameters, one-hit factor R and characteristic dose D0, which indicate that the TL dose responses for individual TL glow peaks in MgSO4:Dy, MgSO4:Dy,Mn and MgSO4:Dy,P phosphors all are supralinear. The non-linearity of dose response for the main dosimetric peak in MgSO4:Dy,P,Cu depends critically on the concentration of doped Cu and sublinearity can be obtained in the dose responses of TL materials doped with a certain amount of Cu. Based on studying the TL glow curves, dose responses and three dimension emission spectra of these phosphors, it is supposed that the TL event is generated via a multi-stage process within a large defect complex in doped magnesium sulphate phosphors. Doping with Cu results in reformation of the defect complex in which there is a strong spatial association between a trapping centre and a recombination centre so that the probability of one-hit TL events increases. The non-linearity of the dose responses is usually a difficulty for measuring higher dose in TL dosemeters. It can be overcome by enlarging the linear range of the dose-response or by calibrating the dose-response curves using non-linear characteristic parameters in a dose response function, such as the composite action dose response function.
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Affiliation(s)
- C X Zhang
- Department of Physics, Zhongshan University, Guangzhou, PR China.
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Ai J, Gao HH, He SZ, Wang L, Luo DL, Yang BF. Effects of matrine, artemisinin, tetrandrine on cytosolic [Ca2+]i in guinea pig ventricular myocytes. Acta Pharmacol Sin 2001; 22:512-5. [PMID: 11747756] [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: 02/22/2023] Open
Abstract
AIM To compare the effects of matrine, artemisinin, and tetrandrine on intracellular Ca2+ concentration ([Ca2+]i) in guinea pig ventricular myocytes. METHODS A single ventricular myocyte was loaded with Fluo 3-acetoxymethyl (Fluo 3-AM). [Ca2+]i was recorded by laser scanning confocal microscope and represented by fluorescence intensity (FI). RESULTS 1) KCl 60 mmol . L-1 elevated the FI from 299 +/ -19 to 1389 +/- 325 (P < 0.01) in the presence of extracellular Ca2+ 1.8 mmol . L-1. 2) Both matrine and artemisinin at the concentration of 100 micromol . L-1 could enhance the increase of FI by KCl 60 mmol . L-1. The FI values reached 1495 +/- 320 and 1646 +/- 308 from 301 +/- 14 and 299 +/- 16 (P < 0.01), respectively. 3) Both tetrandrine 1, 10, and 100 micromol . L-1 and verapamil 10 micromol . L-1 inhibited the influx of extracellular Ca2+ induced by KCl 60 mmol . L-1. 4) Matrine 1, 10, and 100 micromol . L-1 could elevate the FI in the presence of extracellular Ca2+. The FI values reached 441 +/- 96, 504 +/- 112, and 643 +/- 126 from 303 +/- 27, 300 +/- 32, and 296 +/- 19 (P < 0.05), respectively. 5) Tetrandrine 1 and 10 micromol . L-1 could apparently inhibited Ca2+ release from intracellular calcium stores induced by caffeine 20 mmol . L-1 (P < 0.05). CONCLUSION Effects of matrine, artemisinin, and tetrandrine on [Ca2+ )]i in ventricular
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Affiliation(s)
- J Ai
- Department of Pharmacology, Harbin Medical University, Harbin 150086, China
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Shan HL, Zhang XD, Gu RM, Luo DL, Yang BF. Effects of erysimin G on renal tubular function and 70-pS K+ channel activity of thick ascending limb. Acta Pharmacol Sin 2001; 22:411-4. [PMID: 11743887] [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: 02/22/2023] Open
Abstract
AIM To study the effect of erysimin G (CH35H52O13) on the thick ascending limb (TAL) 70-pS K+ channel of rat kidney and its effect on diuresis. METHODS The patch-clamp cell-attached recording technique was used to record the single potassium channel current, and the urine volume (UV) was measured by urethral intubation to determine the diuretic effect. RESULTS Erysimin G can increase the urine volume and decrease the 70-pS potassium channel activity of TAL. CONCLUSION Erysimin G has a diuretic effect and its inhibition on the activity of apical 70-pS potassium channel may be the mechanism of its diuretic effect.
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Affiliation(s)
- H L Shan
- Department of Pharmacology, Harbin Medical University, Harbin 150086, China
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Yang BF, Luo DL, Bao LH, Zhang YC, Wang HZ. Artemisinin blocks activating and slowly activating K+ current in guinea pig ventricular myocytes. Zhongguo Yao Li Xue Bao 1998; 19:269-72. [PMID: 10375742] [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: 02/12/2023]
Abstract
AIM To study the effect of artemisinin (Art) on outward rectifier potassium current in ventricular myocytes. METHODS In isolated guinea pig ventricular myocytes, the effects of Art on the two components of delayed outward rectifier K+ current (IK), the rapidly activating inward K+ current (IKr), and the slowly rectifying outward K+ current (IKs) were observed by the whole cell patch-clamp technique. RESULTS Art decreased IK in a concentration-dependent manner. The IKstep and IKtail were reduced from 387 +/- 46 pA to 240 +/- 48 pA and from 299 +/- 30 pA to 130 +/- 38 pA, respectively at holding potential of +40 mV by Art 50 mumol.L-1. The envelope of tail analysis suggested that both IKr and IKs were inhibited. CONCLUSION Art blocked the two components of delayed outward rectifier K+ current (IKr and IKs) in guinea pig ventricular cells.
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Affiliation(s)
- B F Yang
- Department of Pharmacology, Harbin Medical University, China.
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Yu KN, Cheung T, Young EC, Luo DL. The bioconcentration of 131I in fresh water fish. Health Phys 1996; 71:719-722. [PMID: 8887517 DOI: 10.1097/00004032-199611000-00012] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The dynamic characteristics of the radionuclide concentration process in fresh water fish have been studied. The experimental data for the tilapias were fitted using a simple compartment model to get characteristic parameters such as concentration factors, elimination rate constants, and initial concentration rates, which are 3.08 Bq kg-1/Bq L-1, 0.00573 h-1, and 12.42 Bq kg-1 h-1, respectively. The relative concentrations of 131I in different parts, i.e., head, gills, flesh, bone and internal organs, of the tilapias are also determined, which are found to be 10.8, 15.4, 26.1, 11.0, and 37.0%, respectively. The effects of different factors on the transfer of radionuclides in fresh water fishes are also discussed. Experiments on the tilapias and the common carp show that the variation of concentration factors for different species may be significant even for the same radionuclide and the same ecological system. On the other hand, the variation in the concentration factors for the flesh of the tilapias is not significant for a certain range of 131I concentrations in the water.
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Affiliation(s)
- K N Yu
- Department of Physics and Materials Science, City University of Hong Kong, Kowloon
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Luo DL, Li WH. Evoked tensions in rabbit aorta by emptying intracellular Ca2+ stores with cyclopiazonic acid, thapsigargin, and ryanodine. Zhongguo Yao Li Xue Bao 1995; 16:280-4. [PMID: 7660829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
AIM To study the increase of plasma membrane Ca2+ permeability in response to depletion of intracellular Ca2+ stores. METHODS In Ca(2+)-free medium, 2 selective inhibitors of sarcoplasmic reticulum (SR) Ca2+ pump ATPase, cyclopiazonic acid (CPA) and thapsigargin (Tha), and an activator of Ca(2+)-induced Ca2+ release channel (CICR), ryanodine (Rya), depleted intracellular Ca2+ stores sensitive to both caffeine and phenylephrine in rabbit aortic rings and caused sustained tensions when Ca2+ reintroduction. These tensions were taken as the increase of plasma Ca2+ permeability by depletion of intracellular Ca2+ stores. RESULTS The extracellular Ca(2+)-dependent tensions caused by Tha and Rya 3 mumol.L(-1) and CPA 30 mumol.L(-1) were 0.94, 1.1, and 0.14 g, respectively, and the tension caused by Rya was not inhibited by CPA. CONCLUSION (a) Besides the depletion of intracellular Ca2+ stores, an activated state of Ca2+ release channels in SR may also mediate the activation of Ca2+ influx from plasma membrane in rabbit aorta; (b) Rya needs caffeine to fully open CICR channel in SR.
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Affiliation(s)
- D L Luo
- Department of Pharmacology, Harbin Medical University, China
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Luo DL, Nakazawa M, Ishibashi T, Kato K, Imai S. Putative, selective inhibitors of sarcoplasmic reticulum Ca+(+)-pump ATPase inhibit relaxation by nitroglycerin and atrial natriuretic factor of the rabbit aorta contracted by phenylephrine. J Pharmacol Exp Ther 1993; 265:1187-92. [PMID: 8389854] [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: 01/30/2023] Open
Abstract
Using three putative, selective inhibitors of the Ca+(+)-pump ATPase of sarcoplasmic reticulum (SR), cyclopiazonic acid, thapsigargin and 2,5-di-(tert-butyl)-1,4-benzohydroquinone, the mechanisms of relaxation of the arterial smooth muscle by cyclic GMP-generating vasodilators were studied in the ring preparations of the rabbit aorta. Nitroglycerin (NTG) and atrial natriuretic factor (ANF) were used as representative cyclic GMP-generating vasodilators. When the above three inhibitors of SR Ca+(+)-pump ATPase were present during the period of reloading of intracellular store sites with Ca++, the phasic contractions induced by phenylephrine or caffeine in the succeeding period in Ca+(+)-free media containing 2 mM EGTA were inhibited in a concentration-dependent manner. With 3 x 10(-5) M of cyclopiazonic acid the inhibition was almost complete for both agonists. NTG and ANF relaxed the aorta contracted by phenylephrine (10(-6) M) and produced an increase in cyclic GMP content. All the three SR Ca+(+)-pump ATPase inhibitors produced a concentration-dependent inhibition of the relaxation by NTG and ANF without affecting the increment of cyclic GMP content. These results indicate that the proper functioning of SR Ca+(+)-pump ATPase is necessary for elicitation of relaxation by NTG and ANF. Enhanced sequestration of Ca++ by SR may be an important mechanism by which these compounds induce relaxation in this type of smooth muscle.
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Affiliation(s)
- D L Luo
- Department of Pharmacology, Niigata University School of Medicine, Japan
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