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Belotti EM, Amweg AN, Matiller V, Varela ML, Stassi AF, Velázquez MML, Ortega HH, Rey F, Salvetti NR. Effects of adrenocorticotrophic hormone on the expression of matrix metalloproteinases and their inhibitors in the bovine ovary. Reprod Fertil Dev 2021; 32:748-762. [PMID: 32362313 DOI: 10.1071/rd19232] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 12/01/2019] [Indexed: 01/06/2023] Open
Abstract
Cattle undergo numerous environmental and management stressors that reduce fertility and affect ovulation. The extracellular matrix of the follicle wall can be altered by matrix metalloproteinases (MMPs), the activities of which are regulated by interleukins and tissue-specific inhibitors of metalloproteinases (TIMPs), especially during ovulation. The aims of the present study were to: (1) evaluate changes in the hormone milieu, the localisation and activity of MMP2 and MMP9 and the localisation of MMP14, TIMP1 and TIMP2 in response to adrenocorticotrophic hormone (ACTH) during the preovulatory period in cows; and (2) determine the direct effects of ACTH on the mRNA expression of MMP2 and MMP9 in the cultured follicle wall of bovine ovaries obtained from an abattoir. 100IU ACTH was administered during pro-oestrus every 12h until ovariectomy, which was performed before ovulation. Cortisol concentrations in the plasma and follicular fluid (FF) of preovulatory follicles were higher in ACTH-treated than control cows. Progesterone presented subluteal concentrations in plasma of ACTH-treated cows (P<0.05). MMP2 immunostaining and activity in ovaries were higher in ACTH-treated than control cows (P<0.05), whereas MMP9 immunostaining was similar between the two groups. However, unlike in control cows, MMP9 activity was absent in the FF of ACTH-treated cows. These results suggest that the administration of ACTH during the preovulatory period in cows could cause changes that culminate in modifications in the content and activation of MMPs and TIMPs in the ovary, which could interfere with the ovulation process.
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Affiliation(s)
- E M Belotti
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - A N Amweg
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - V Matiller
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - M L Varela
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - A F Stassi
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - M M L Velázquez
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - H H Ortega
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - F Rey
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina
| | - N R Salvetti
- Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral, R. P. Kreder 2805, CP3080, Esperanza, Santa Fe, Argentina; and Corresponding author.
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Gareis N, Angeli E, Huber E, Salvetti N, Rodríguez F, Ortega H, Hein G, Rey F. Alterations in key metabolic sensors involved in bovine cystic ovarian disease. Theriogenology 2018; 120:138-146. [DOI: 10.1016/j.theriogenology.2018.07.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 07/19/2018] [Accepted: 07/31/2018] [Indexed: 12/15/2022]
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3
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Lu Z, Liu Y, Xu J, Yin H, Yuan H, Gu J, Chen YH, Shi L, Chen D, Xie B. Immunohistochemical quantification of expression of a tight junction protein, claudin-7, in human lung cancer samples using digital image analysis method. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2018; 155:179-187. [PMID: 29512497 DOI: 10.1016/j.cmpb.2017.12.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 11/11/2017] [Accepted: 12/11/2017] [Indexed: 06/08/2023]
Abstract
BACKGROUND AND OBJECTIVES Tight junction proteins are correlated with cancer development. As the pivotal proteins in epithelial cells, altered expression and distribution of different claudins have been reported in a wide variety of human malignancies. We have previously reported that claudin-7 was strongly expressed in benign bronchial epithelial cells at the cell-cell junction while expression of claudin-7 was either altered with discontinued weak expression or completely absent in lung cancers. Based on these results, we continued working on the expression pattern of claudin-7 and its relationship with lung cancer development. We herein proposed a new Digital Image Classification, Fragmentation index, Morphological analysis (DICFM) method for differentiating the normal lung tissues and lung cancer tissues based on the claudin-7 immunohistochemical staining. METHODS Seventy-seven lung cancer samples were obtained from the Second Affiliated Hospital of Zhejiang University and claudin-7 immunohistochemical staining was performed. Based on C++ and Open Source Computer Vision Library (OpenCV, version 2.4.4), the DICFM processing module was developed. Intensity and fragmentation of claudin-7 expression, as well as the morphological parameters of nuclei were calculated. Evaluation of results was performed using Receiver Operator Characteristic (ROC) analysis. RESULTS Agreement between these computational results and the results obtained by two pathologists was demonstrated. The intensity of claudin-7 expression was significantly decreased while the fragmentation was significantly increased in the lung cancer tissues compared to the normal lung tissues and the intensity was strongly positively associated with the differentiation of lung cancer cells. Moreover, the perimeters of the nuclei of lung cancer cells were significantly greater than that of the normal lung cells, while the parameters of area and circularity revealed no statistical significance. CONCLUSIONS Taken together, our DICFM approach may be applied as an appropriate approach to quantify the immunohistochemical staining of claudin-7 on the cell membrane and claudin-7 may serve as a marker for identification of lung cancer.
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Affiliation(s)
- Zhe Lu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, China
| | - Yi Liu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, China
| | - Junfeng Xu
- School of Science, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, China
| | - Hongping Yin
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, China
| | - Haiying Yuan
- Department of Clinical Laboratory, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province 310000, China
| | - Jinjing Gu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, China
| | - Yan-Hua Chen
- Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA
| | - Liyun Shi
- School of Basic Medical Science, Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province 210023, China
| | - Dan Chen
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, China
| | - Bin Xie
- School of Science, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, China.
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Shi P, Zhong J, Hong J, Huang R, Wang K, Chen Y. Automated Ki-67 Quantification of Immunohistochemical Staining Image of Human Nasopharyngeal Carcinoma Xenografts. Sci Rep 2016; 6:32127. [PMID: 27562647 PMCID: PMC4999801 DOI: 10.1038/srep32127] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 08/02/2016] [Indexed: 01/15/2023] Open
Abstract
Nasopharyngeal carcinoma is one of the malignant neoplasm with high incidence in China and south-east Asia. Ki-67 protein is strictly associated with cell proliferation and malignant degree. Cells with higher Ki-67 expression are always sensitive to chemotherapy and radiotherapy, the assessment of which is beneficial to NPC treatment. It is still challenging to automatically analyze immunohistochemical Ki-67 staining nasopharyngeal carcinoma images due to the uneven color distributions in different cell types. In order to solve the problem, an automated image processing pipeline based on clustering of local correlation features is proposed in this paper. Unlike traditional morphology-based methods, our algorithm segments cells by classifying image pixels on the basis of local pixel correlations from particularly selected color spaces, then characterizes cells with a set of grading criteria for the reference of pathological analysis. Experimental results showed high accuracy and robustness in nucleus segmentation despite image data variance. Quantitative indicators obtained in this essay provide a reliable evidence for the analysis of Ki-67 staining nasopharyngeal carcinoma microscopic images, which would be helpful in relevant histopathological researches.
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Affiliation(s)
- Peng Shi
- School of Mathematics and Computer Science, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Jing Zhong
- The Graduate School, Fujian Medical University, Fuzhou, Fujian 350004, China
| | - Jinsheng Hong
- Department of Radiation Oncology, Laboratory of Radiation Biology, First Affiliated Hospital, Fujian Medical University, Fuzhou, Fujian 350005, China
| | - Rongfang Huang
- Department of Pathology, Fujian Provincial Cancer Hospital, Fuzhou, Fujian 350014, China
| | - Kaijun Wang
- School of Mathematics and Computer Science, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Yunbin Chen
- The Graduate School, Fujian Medical University, Fuzhou, Fujian 350004, China.,Department of Radiology, Fujian Provincial Cancer Hospital, Fuzhou, Fujian 350014, China
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Ranefall P, Wählby C. Global gray-level thresholding based on object size. Cytometry A 2016; 89:385-90. [PMID: 26800009 DOI: 10.1002/cyto.a.22806] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 11/26/2015] [Accepted: 12/01/2015] [Indexed: 11/07/2022]
Abstract
In this article, we propose a fast and robust global gray-level thresholding method based on object size, where the selection of threshold level is based on recall and maximum precision with regard to objects within a given size interval. The method relies on the component tree representation, which can be computed in quasi-linear time. Feature-based segmentation is especially suitable for biomedical microscopy applications where objects often vary in number, but have limited variation in size. We show that for real images of cell nuclei and synthetic data sets mimicking fluorescent spots the proposed method is more robust than all standard global thresholding methods available for microscopy applications in ImageJ and CellProfiler. The proposed method, provided as ImageJ and CellProfiler plugins, is simple to use and the only required input is an interval of the expected object sizes. © 2016 International Society for Advancement of Cytometry.
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Affiliation(s)
- Petter Ranefall
- Centre for Image Analysis and SciLifeLab, Uppsala University, Uppsala, Sweden
| | - Carolina Wählby
- Centre for Image Analysis and SciLifeLab, Uppsala University, Uppsala, Sweden
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6
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Cytoprotective mechanisms in rats lung parenchyma with zinc deprivation. Biometals 2014; 27:305-15. [DOI: 10.1007/s10534-014-9713-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 02/01/2014] [Indexed: 10/25/2022]
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7
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Brianezi G, Minicucci EM, Marques MEA, Miot HA. Evaluation epidermal p53 immunostaining by digital image analysis. Skin Res Technol 2012; 19:e108-12. [DOI: 10.1111/j.1600-0846.2012.00616.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Accepted: 04/26/2012] [Indexed: 12/27/2022]
Affiliation(s)
- Gabrielli Brianezi
- Botucatu Medical School; UNESP - Univ Estadual Paulista; Department of Pathology; 18618-000; Botucatu; SP; Brazil
| | - Eliana Maria Minicucci
- Botucatu Medical School; UNESP - Univ Estadual Paulista; Department of Dermatology and Radiotherapy; 18618-000; Botucatu; SP; Brazil
| | | | - Hélio Amante Miot
- Botucatu Medical School; UNESP - Univ Estadual Paulista; Department of Dermatology and Radiotherapy; 18618-000; Botucatu; SP; Brazil
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8
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Abstract
Suboptimal intake of Zn is one of the most common nutritional problems worldwide. Previously, we have shown that Zn deficiency (ZD) produces oxidative and nitrosative stress in the lung of rats. We analyse the effect of moderate ZD on the expression of several intermediate filaments of the cytoskeleton, as well as the effect of restoring Zn during the refeeding period. Adult male rats were divided into three groups: Zn-adequate control (CO) group; ZD group; Zn-refeeding group. CerbB-2 and proliferating cell nuclear antigen (PCNA) expression was increased in the ZD group while the other parameters did not change. During the refeeding time, CerbB-2, cytokeratins, vimentin and PCNA immunostaining was higher than that in the CO group. The present findings indicate that the overexpression of some markers could lead to the fibrotic process in the lung. Perhaps ZD implications must be taken into account in health interventions because an inflammation environment is associated with ZD in the lung.
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Salvetti NR, Stangaferro ML, Palomar MM, Alfaro NS, Rey F, Gimeno EJ, Ortega HH. Cell proliferation and survival mechanisms underlying the abnormal persistence of follicular cysts in bovines with cystic ovarian disease induced by ACTH. Anim Reprod Sci 2010; 122:98-110. [DOI: 10.1016/j.anireprosci.2010.08.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 07/20/2010] [Accepted: 08/02/2010] [Indexed: 02/02/2023]
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10
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Salvetti NR, Baravalle C, Mira GA, Gimeno EJ, Dallard BE, Rey F, Ortega HH. Heat shock protein 70 and sex steroid receptors in the follicular structures of induced ovarian cysts. Reprod Domest Anim 2008; 44:805-14. [PMID: 18992127 DOI: 10.1111/j.1439-0531.2008.01086.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to estimate the expression and relative amounts of estrogen (ER) and progesterone receptors (PR) and their isoforms as well as heat shock protein 70 (HSP70) in ovaries of rats with induced cystic ovarian disease (COD). Primary, secondary, tertiary, atretic and cystic follicles were evaluated by immunohistochemistry and total ovarian proteins were analyzed by Western blot. In the granulosa layer, growing and cystic follicles in the treated group have a higher expression of ERalpha than growing follicles of control individuals. In the theca interna layer, tertiary follicles presented a significantly higher expression of ERalpha in the treated group. An increase in total ERalpha protein was detected in the treated group. Granulosa cells of all growing, atretic and cystic follicles show a lower expression of ERbeta in animals with COD, and the total protein expression of ERbeta was lower in this group. The expression of PR was lower in the granulosa cell layer of tertiary and cystic follicles in treated animals, and theca interna layer had less intense immunostaining in this group. Although there were no differences in the expression of PR-B by Western blotting, the expression of PR-A was higher and the expression of PR-C was smaller in the treated group. An intense HSP70 immunostaining was observed in the cells of cystic follicles. By Western blotting, higher protein expression of HSP70 was detected in the ovarian samples of the control group than those of the treated ones. Ovaries of animals with COD exhibited an altered steroid receptor expression and subtype balance as compared with control animals, and an increase in HSP70 immunoexpression.
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Affiliation(s)
- N R Salvetti
- Department of Anatomy and Histology, Center for Experimental Biology and Laboratory Animals Sciences, Faculty of Veterinary Sciences, National University of Litoral, Argentina
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Baravalle C, Salvetti NR, Mira GA, Pezzone N, Ortega HH. Microscopic characterization of follicular structures in letrozole-induced polycystic ovarian syndrome in the rat. Arch Med Res 2006; 37:830-9. [PMID: 16971221 DOI: 10.1016/j.arcmed.2006.04.006] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2005] [Accepted: 04/24/2006] [Indexed: 02/08/2023]
Abstract
BACKGROUND Our objective was to characterize the tissular distribution of relevant cytoskeletal proteins, cellular adhesion molecules and proliferation markers and conduct a histomorphometrical study of the follicular wall of letrozole-induced polycystic ovaries. METHODS Twenty rats were divided into two groups: a control group (C) of ten rats that received vehicle only (0.9% NaCl solution) once daily p.o. and a treatment group (T) of ten animals administered letrozole at a concentration of 1 mg/kg p.o. dissolved in 0.9% NaCl solution once daily during 21 days. Twenty four h after the last administration, all animals were sacrificed. Control animals were sacrificed in proestrous (n = 5) and diestrous (n = 5). Serum hormone levels, histomorphometrical changes and immunoexpression of intermediate filaments (vimentin, cytokeratins and desmin), cadherins and proliferation cellular nuclear antigen were examined. RESULTS The granulosa cell layer of cystic follicles had a greater significant immunostaining for vimentin and cytokeratins. Immunohistochemical localization of desmin was restricted to the theca externa. Positive immunoreactivity for cadherins rises gradually and significantly, together with the follicular development, and immunoreactivity was comparatively stronger in follicular cysts. A significantly higher immunostaining for PCNA cells was observed in secondary and tertiary follicles as compared with atretic and cystic follicles. An increase in the LH, FSH and testosterone serum concentrations was observed in letrozole-treated rats. Estradiol and progesterone showed a considerable reduction. CONCLUSIONS The changes observed are probably due to structural and functional alterations that occur during the process of cystogenesis and may be associated with important modifications in the expression of cytoskeletal proteins, cellular adhesion molecules and proliferation markers that may be essential for proper cellular functioning.
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Affiliation(s)
- Celina Baravalle
- Department of Anatomy and Histology, Faculty of Veterinary Sciences, National University of Litoral, Esperanza, Santa Fe, Argentina
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12
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Mao KZ, Zhao P, Tan PH. Supervised learning-based cell image segmentation for p53 immunohistochemistry. IEEE Trans Biomed Eng 2006; 53:1153-63. [PMID: 16761842 DOI: 10.1109/tbme.2006.873538] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this paper, we present two new algorithms for cell image segmentation. First, we demonstrate that pixel classification-based color image segmentation in color space is equivalent to performing segmentation on grayscale image through thresholding. Based on this result, we develop a supervised learning-based two-step procedure for color cell image segmentation, where color image is first mapped to grayscale via a transform learned through supervised learning, thresholding is then performed on the grayscale image to segment objects out of background. Experimental results show that the supervised learning-based two-step procedure achieved a boundary disagreement (mean absolute distance) of 0.85 while the disagreement produced by the pixel classification-based color image segmentation method is 3.59. Second, we develop a new marker detection algorithm for watershed-based separation of overlapping or touching cells. The merit of the new algorithm is that it employs both photometric and shape information and combines the two naturally in the framework of pattern classification to provide more reliable markers. Extensive experiments show that the new marker detection algorithm achieved 0.4% and 0.2% over-segmentation and under-segmentation, respectively, while reconstruction-based method produced 4.4% and 1.1% over-segmentation and under-segmentation, respectively.
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Affiliation(s)
- K Z Mao
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore.
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13
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Bengtsson E. Computerized Cell Image Analysis: Past, Present, and Future. IMAGE ANALYSIS 2003. [DOI: 10.1007/3-540-45103-x_54] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Law AKW, Lam KY, Lam FK, Wong TKW, Poon JLS, Chan FHY. Image analysis system for assessment of immunohistochemically stained proliferative marker (MIB-1) in oesophageal squamous cell carcinoma. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2003; 70:37-45. [PMID: 12468125 DOI: 10.1016/s0169-2607(02)00025-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The prognosis of oesophageal cancer patients is related to the portion of MIB-1 positively stained tumour nuclei. In this study, an image analysis system was developed based on LEICA Image Processing and Analysis System to reduce the subjective, tedious and inaccurate manual counting of nuclei staining. Representative oesophageal cancer tissues were collected and immunohistochemical preparations of MIB-1 were made. The MIB-1 positive nuclei in these tumours were assessed by quantitative counting, semi-quantitative counting, and three computer assessment methods using LEICA QWIN PRO. Our results showed that computer assessment methods were reliable and consistent. The procedure using the system could be accomplished within 15 min. Overlapped or missed counting of nuclei by the observer were eliminated. The image analysis system can really assist experts in obtaining reliable data for the prognosis of oesophageal cancer patients quickly.
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Affiliation(s)
- Albert K W Law
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong
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Osterberg J, Haglund U. Effect of linomide on gut immune cell distribution and on TNF-alpha in plasma and ascites: an experimental study in the septic rat. Shock 2002; 18:471-5. [PMID: 12412629 DOI: 10.1097/00024382-200211000-00015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A significant reduction of the pan T lymphocytes as well as CD4+ and CD8 subsets of cells in the gut mucosa of the septic rats has previously been demonstrated. In contrast, the populations of major histocompatibility complex (MHC) class II-positive cells and macrophages increased. The aim of this study was to evaluate if the immunomodulator Linomide influenced the immune cell distribution in the small intestinal mucosa in sepsis and, furthermore, if these changes coincide with changes in the concentration of tumor necrosis factor-alpha (TNF-alpha) in plasma or ascites. Polymicrobial sepsis was induced in rats by cecal ligation and puncture (CLP). Three different experimental groups were used: CLP, Linomide p.o. + CLP, and Linomide i.p.+ CLP, with adequate controls. Specimens were taken from the small bowel for immunohistologic staining and grading of mucosal injury. The following monoclonal antibodies were used: W3/25, OX8, R73, OX6, and ED1. All slides were examined by one "blinded" examiner. Mucosal injury was graded from 0 to 5. The immunostained tissues were also analyzed by an automatic color-based image system. All controls had a normal appearance of the mucosa (grade 0-1), whereas the septic animals had a median grade of III (II-IV) mucosal injury. Linomide i.p. + CLP decreased mucosal damage to median I (0-IV, P < 0.05). Linomide had no effects on the immune cell distribution in controls. In CLP rats, a significant reduction in both CD4+ and CD8+ T lymphocytes as well as an increased number of macrophages and MHC class II-positive cells was seen in the villi as compared with sham-operated controls (P < 0.05). Linomide attenuated these changes for CD8+ and T lymphocytes and macrophages. Sepsis caused increased concentrations of TNF-alpha in portal blood and ascites 3 h from CLP induction. This increase was attenuated by Linomide.
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Wester K, Andersson AC, Ranefall P, Bengtsson E, Malmström PU, Busch C. Cultured human fibroblasts in agarose gel as a multi-functional control for immunohistochemistry. Standardization Of Ki67 (MIB1) assessment in routinely processed urinary bladder carcinoma tissue. J Pathol 2000; 190:503-11. [PMID: 10700002 DOI: 10.1002/(sici)1096-9896(200003)190:4<503::aid-path537>3.0.co;2-e] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Immunohistochemistry (IHC) in clinical practice is hampered by lack of standardization and by subjectivity in interpretation and quantitation. This study aimed to develop a control system for IHC in routinely fixed and histoprocessed tissues. Such a system should be easy to handle in clinical practice and should reflect variations in fixation time, section thickness, section storage conditions, and staining protocols. In addition, in image analysis quantitation of immunostained tissues, when using classifiers computed on IHC-control images, the control system should be very stable. Cultured human fibroblasts were suspended in agarose, transferred into a length of tubing and stored at 4 degrees C. Three pieces of the cellgel control were separately fixed, histoprocessed, and paraffin-embedded as external controls. One piece was prepared together with each of 18 bladder carcinoma biopsies as internal controls. Slides with sections from the biopsy and all types of cellgel controls were stored at different temperatures and then stained using three different IHC protocols. The fibroblasts were homogeneously distributed in the agarose gel. Variation in section thickness did not influence immunostaining as evaluated by the MIB1 labelling index (MIB1 LI). The external controls decreased notably in MIB1 LI with increased fixation time. This was not seen in the 18 internal controls that were each fixed with a fresh biopsy. However, section storage and immunostaining conditions influenced the MIB1 expression equally in all control types and to a similar degree to the biopsies. Furthermore, colour-based image analysis quantitation of MIB1 LI in biopsies proved stable and independent of the control type used to compute the classifier.
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Affiliation(s)
- K Wester
- Department of Genetics and Pathology, Uppsala University, Uppsala, Sweden.
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