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Biloborodova T, Lomakin S, Skarga-Bandurova I, Krytska Y. Region of Interest Identification in the Cervical Digital Histology Images. PROGRESS IN ARTIFICIAL INTELLIGENCE 2022. [DOI: 10.1007/978-3-031-16474-3_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Fractal Analysis of Cardiac Fibrosis Patterns Derived From Magnetization Transfer Contrast MRI in Patients With End-Stage Renal Disease. AJR Am J Roentgenol 2020; 214:506-513. [DOI: 10.2214/ajr.19.21745] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Pulford E, Hocking A, Griggs K, McEvoy J, Bonder C, Henderson DW, Klebe S. Vasculogenic mimicry in malignant mesothelioma: an experimental and immunohistochemical analysis. Pathology 2016; 48:650-659. [PMID: 27956272 DOI: 10.1016/j.pathol.2016.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 07/11/2016] [Accepted: 07/18/2016] [Indexed: 12/20/2022]
Abstract
Vasculogenic mimicry, the process in which cancer cells form angiomatoid structures independent of or in addition to host angiogenesis has been recorded in several otherwise non-endothelial malignant neoplasms. This study describes evidence of routine vascular mimicry by human mesothelioma cell lines in vitro, when the cell lines are cultured alone or co-cultured with human umbilical vascular endothelial cells, with the formation of angiomatoid tubular networks. Vasculogenic mimicry is also supported by immunohistochemical demonstration of human-specific anti-mitochondria antibody labelling of tumour-associated vasculature of human mesothelioma cells xenotransplanted into nude mice, and by evidence of vascular mimicry in some biopsy samples of human malignant mesotheliomas. These studies show mosaic interlacing of cells that co-label or label individually for immunohistochemical markers of endothelial and mesothelial differentiation. If vascular mimicry in mesothelioma can be characterised more fully, this may facilitate identification of more specific and targeted therapeutic approaches such as anti-angiogenesis in combination with chemotherapy and immunotherapy or other therapeutic approaches.
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Affiliation(s)
- Emily Pulford
- Department of Anatomical Pathology, Flinders University, Bedford Park, SA, Australia
| | - Ashleigh Hocking
- Department of Anatomical Pathology, Flinders University, Bedford Park, SA, Australia
| | - Kim Griggs
- Department of Anatomical Pathology, Flinders University, Bedford Park, SA, Australia
| | - James McEvoy
- Department of Anatomical Pathology, Flinders University, Bedford Park, SA, Australia
| | - Claudine Bonder
- Centre for Cancer Biology, University of South Australia, SA Pathology, and School of Medicine, University of Adelaide, Bedford Park, SA, Australia
| | - Douglas W Henderson
- Department of Anatomical Pathology, Flinders University, Bedford Park, SA, Australia; SA Pathology at Flinders Medical Centre, Bedford Park, SA, Australia
| | - Sonja Klebe
- Department of Anatomical Pathology, Flinders University, Bedford Park, SA, Australia; SA Pathology at Flinders Medical Centre, Bedford Park, SA, Australia.
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Takeda K, Kudo SE, Misawa M, Mori Y, Kudo T, Kodama K, Wakamura K, Miyachi H, Hidaka E, Ishida F, Inoue H. Comparison of the endocytoscopic and clinicopathologic features of colorectal neoplasms. Endosc Int Open 2016; 4:E397-402. [PMID: 27547815 PMCID: PMC4990025 DOI: 10.1055/s-0042-101753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 01/18/2016] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND AND AIM Permeation of a vein or lymphatic vessel by a tumor is a key risk factor for lymph node metastasis. We examined the features of colorectal tumor vessel permeation using endocytoscopy, an ultra-high magnifying endoscopic system combined with a narrow-band imaging capability (EC-NBI). PATIENTS AND METHODS We examined 188 colorectal lesions using EC-NBI before treatment was started. We measured the diameters of tumor vessels on EC-NBI images. We used the tumor vessel diameter (the mean diameter of four tumor-associated vessels) and the variation in tumor vessel caliber (the difference between the maximum and minimum diameters of the vessels expressed as a proportion) to judge changes in vessel formation. We examined the relationship between these variables and the extent of venous or lymphatic vessel permeation (vessel invasion) established by immunohistochemical examination of the resected specimen using monoclonal antibodies against the CD34 and D2 - 40 antigens. We also analyzed the relationships between tumor vessel diameter, tumor vessel caliber variation, and depth of tumor invasion. RESULTS There were significant differences in tumor vessel diameter and caliber variation between tumors in situ and T1 - T3 carcinomas. In T1 carcinomas, larger tumor vessel diameter and greater tumor vessel caliber variation were significantly associated with venous permeation. In T2 and T3 carcinomas, greater tumor vessel caliber variation was significantly associated with venous permeation. CONCLUSIONS The vessel diameter and caliber variation of colorectal tumor microvasculature are associated with depth of invasion and venous permeation, especially in T1 carcinomas.
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Affiliation(s)
- Kenichi Takeda
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Shin-ei Kudo
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan,Corresponding author Shin-ei Kudo, MD PhD Digestive Disease CenterShowa UniversityNorthern Yokohama Hospital35-1 Chigasaki-ChuoTsuzukiYokohama 224-8503Japan+81-45-9497535
| | - Masashi Misawa
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Yuichi Mori
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Toyoki Kudo
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Kenta Kodama
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Kunihiko Wakamura
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Hideyuki Miyachi
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Eiji Hidaka
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Fumio Ishida
- Digestive Disease Center, Showa University, Yokohama Northern Hospital, Kanagawa, Japan
| | - Haruhiro Inoue
- Digestive Disease Center, Showa University, Koto Toyosu Hospital, Tokyo, Japan
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Wang R, Xu Y, Liu B. Recombination spot identification Based on gapped k-mers. Sci Rep 2016; 6:23934. [PMID: 27030570 PMCID: PMC4814916 DOI: 10.1038/srep23934] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 03/16/2016] [Indexed: 12/14/2022] Open
Abstract
Recombination is crucial for biological evolution, which provides many new combinations of genetic diversity. Accurate identification of recombination spots is useful for DNA function study. To improve the prediction accuracy, researchers have proposed several computational methods for recombination spot identification. The k-mer feature is one of the most useful features for modeling the properties and function of DNA sequences. However, it suffers from the inherent limitation. If the value of word length k is large, the occurrences of k-mers are closed to a binary variable, with a few k-mers present once and most k-mers are absent. This usually causes the sparse problem and reduces the classification accuracy. To solve this problem, we add gaps into k-mer and introduce a new feature called gapped k-mer (GKM) for identification of recombination spots. By using this feature, we present a new predictor called SVM-GKM, which combines the gapped k-mers and Support Vector Machine (SVM) for recombination spot identification. Experimental results on a widely used benchmark dataset show that SVM-GKM outperforms other highly related predictors. Therefore, SVM-GKM would be a powerful predictor for computational genomics.
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Affiliation(s)
- Rong Wang
- School of Computer Science and Technology, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Yong Xu
- School of Computer Science and Technology, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Bin Liu
- School of Computer Science and Technology, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
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Mikalsen LTG, Dhakal HP, Bruland ØS, Naume B, Borgen E, Nesland JM, Olsen DR. The clinical impact of mean vessel size and solidity in breast carcinoma patients. PLoS One 2013; 8:e75954. [PMID: 24146798 PMCID: PMC3795733 DOI: 10.1371/journal.pone.0075954] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 08/17/2013] [Indexed: 12/31/2022] Open
Abstract
Angiogenesis quantification, through vessel counting or area estimation in the most vascular part of the tumour, has been found to be of prognostic value across a range of carcinomas, breast cancer included. We have applied computer image analysis to quantify vascular properties pertaining to size, shape and spatial distributions in photographed fields of CD34 stained sections. Aided by a pilot (98 cases), seven parameters were selected and validated on a separate set from 293 breast cancer patients. Two new prognostic markers were identified through continuous cox regression with endpoints breast cancer specific survival and distant disease free survival: The average size of the vessels as measured by their perimeter (p = 0.003 and 0.004, respectively), and the average complexity of the vessel shapes measured by their solidity (p = 0.004 and 0.004). The Hazard ratios for the corresponding median-dichotomized markers were 2.28 (p = 0.005) and 1.89 (p = 0.016) for the mean perimeter and 1.80 (p = 0.041) and 1.55 (p = 0.095) for the shape complexity. The markers were associated with poor histologic type, high grade, necrosis, HR negativity, inflammation, and p53 expression (vessel size only). Both markers were found to strongly influence the prognostic properties of vascular invasion (VI) and disseminated tumour cells in the bone marrow. The latter being prognostic only in cases with large vessels (p = 0.004 and 0.043) or low complexity (p = 0.018 and 0.024), but not in the small or complex vessel groups (p>0.47). VI was significant in all groups, but showed greater hazard ratios for small and low complexity vessels (6.54-11.2) versus large and high complexity vessels (2.64-3.06). We find that not only the overall amount of produced vasculature in angiogenic hot-spots is of prognostic significance, but also the morphological appearance of the generated vessels, i.e. the size and shape of vessels in the studied hot spots.
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Affiliation(s)
| | - Hari Prasad Dhakal
- Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital HF, Oslo, Norway
| | - Øyvind S. Bruland
- Department of Oncology, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
- Institute for Clinical Medicine, University of Oslo, Oslo, Norway
| | - Bjørn Naume
- Department of Oncology, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
- Institute for Clinical Medicine, University of Oslo, Oslo, Norway
| | - Elin Borgen
- Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital HF, Oslo, Norway
| | - Jahn M. Nesland
- Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital HF, Oslo, Norway
- Institute for Clinical Medicine, University of Oslo, Oslo, Norway
| | - Dag Rune Olsen
- Faculty of Mathematics and Natural Sciences, University of Bergen, Bergen, Norway
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Digital microscopy assessment of angiogenesis in different breast cancer compartments. BIOMED RESEARCH INTERNATIONAL 2013; 2013:286902. [PMID: 24073397 PMCID: PMC3773887 DOI: 10.1155/2013/286902] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 07/29/2013] [Indexed: 12/03/2022]
Abstract
Background/Aim. Tumour angiogenesis defined by microvessel density (MVD) is generally accepted as a prognostic factor in breast cancer. However, due to variability of measurement systems and cutoffs, it is questionable to date whether it contributes to predictive outline. Our study aims to grade vascular heterogeneity by comparing clear-cut compartments: tumour associated stroma (TAS), tumour parenchyma, and tumour invasive front. Material and Methods. Computerized vessel area measurement was performed using a tissue cytometry system (TissueFAXS) on slides originated from 50 patients with breast cancer. Vessels were marked using immunohistochemistry with CD34. Regions of interest were manually defined for each tumour compartment. Results. Tumour invasive front vascular endothelia area was 2.15 times higher than that in tumour parenchyma and 4.61 times higher than that in TAS (P < 0.002). Worth to mention that the lymph node negative subgroup of patients show a slight but constant increase of vessel index in all examined compartments of breast tumour. Conclusion. Whole slide digital examination and region of interest (ROI) analysis are a valuable tool in scoring angiogenesis markers and disclosing their prognostic capacity. Our study reveals compartments' variability of vessel density inside the tumour and highlights the propensity of invasive front to associate an active process of angiogenesis with potential implications in adjuvant therapy.
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Abstract
Fractal characteristics of chromatin, revealed by light or electron microscopy, have been reported during the last 20 years. Fractal features can easily be estimated in digitalized microscopic images and are helpful for diagnosis and prognosis of neoplasias. During carcinogenesis and tumor progression, an increase of the fractal dimension (FD) of stained nuclei has been shown in intraepithelial lesions of the uterine cervix and the anus, oral squamous cell carcinomas or adenocarcinomas of the pancreas. Furthermore, an increased FD of chromatin is an unfavorable prognostic factor in squamous cell carcinomas of the oral cavity and the larynx, melanomas and multiple myelomas. High goodness-of-fit of the regression line of the FD is a favorable prognostic factor in acute leukemias and multiple myelomas. The nucleus has fractal and power-law organization in several different levels, which might in part be interrelated. Some possible relations between modifications of the chromatin organization during carcinogenesis and tumor progression and an increase of the FD of stained chromatin are suggested. Furthermore, increased complexity of the chromatin structure, loss of heterochromatin and a less-perfect self-organization of the nucleus in aggressive neoplasias are discussed.
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Affiliation(s)
- Konradin Metze
- Department of Pathology, Faculty of Medical Sciences Research Group, 'Analytical Cellular Pathology' and National Institute of Photonics Applied to Cell Biology, University of Campinas, Campinas, Brazil +55 19 32893897 kmetze.at.fcm.unicamp.br
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Kayser G, Kayser K. Quantitative pathology in virtual microscopy: history, applications, perspectives. Acta Histochem 2013; 115:527-32. [PMID: 23313439 DOI: 10.1016/j.acthis.2012.12.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 12/03/2012] [Indexed: 11/19/2022]
Abstract
With the emerging success of commercially available personal computers and the rapid progress in the development of information technologies, morphometric analyses of static histological images have been introduced to improve our understanding of the biology of diseases such as cancer. First applications have been quantifications of immunohistochemical expression patterns. In addition to object counting and feature extraction, laws of thermodynamics have been applied in morphometric calculations termed syntactic structure analysis. Here, one has to consider that the information of an image can be calculated for separate hierarchical layers such as single pixels, cluster of pixels, segmented small objects, clusters of small objects, objects of higher order composed of several small objects. Using syntactic structure analysis in histological images, functional states can be extracted and efficiency of labor in tissues can be quantified. Image standardization procedures, such as shading correction and color normalization, can overcome artifacts blurring clear thresholds. Morphometric techniques are not only useful to learn more about biological features of growth patterns, they can also be helpful in routine diagnostic pathology. In such cases, entropy calculations are applied in analogy to theoretical considerations concerning information content. Thus, regions with high information content can automatically be highlighted. Analysis of the "regions of high diagnostic value" can deliver in the context of clinical information, site of involvement and patient data (e.g. age, sex), support in histopathological differential diagnoses. It can be expected that quantitative virtual microscopy will open new possibilities for automated histological support. Automated integrated quantification of histological slides also serves for quality assurance. The development and theoretical background of morphometric analyses in histopathology are reviewed, as well as their application and potential future implementation in virtual microscopy.
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Affiliation(s)
- Gian Kayser
- Institute of Pathology, University Hospital Freiburg, Germany.
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Wan J, Chai H, Yu Z, Ge W, Kang N, Xia W, Che Y. HIF-1α effects on angiogenic potential in human small cell lung carcinoma. J Exp Clin Cancer Res 2011; 30:77. [PMID: 21843314 PMCID: PMC3174873 DOI: 10.1186/1756-9966-30-77] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Accepted: 08/15/2011] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Hypoxia-inducible factor-1 alpha (HIF-1α) maybe an important regulatory factor for angiogenesis of small cell lung cancer (SCLC). Our study aimed to investigate the effect of HIF-1α on angiogenic potential of SCLC including two points: One is the effect of HIF-1α on the angiogenesis of SCLC in vivo. The other is the regulation of angiogenic genes by HIF-1α in vitro and in vivo. METHODS In vivo we used an alternative method to study the effect of HIF-1a on angiogenic potential of SCLC by buliding NCI-H446 cell transplantation tumor on the chick embryo chorioallantoic membrane (CAM) surface. In vitro we used microarray to screen out the angiogenic genes regulated by HIF-1a and tested their expression level in CAM transplantation tumor by RT-PCR and Western-blot analysis. RESULTS In vivo angiogenic response surrounding the SCLC transplantation tumors in chick embryo chorioallantoic membrane (CAM) was promoted after exogenous HIF-1α transduction (p < 0.05). In vitro the changes of angiogenic genes expression induced by HIF-1α in NCI-H446 cells were analyzed by cDNA microarray experiments. HIF-1α upregulated the expression of angiogenic genes VEGF-A, TNFAIP6, PDGFC, FN1, MMP28, MMP14 to 6.76-, 6.69-, 2.26-, 2.31-, 4.39-, 2.97- fold respectively and glycolytic genes GLUT1, GLUT2 to2.98-, 3.74- fold respectively. In addition, the expression of these angiogenic factors were also upregulated by HIF-1α in the transplantion tumors in CAM as RT-PCR and Western-blot analysis indicated. CONCLUSIONS These results indicated that HIF-1α may enhance the angiogenic potential of SCLC by regulating some angiogenic genes such as VEGF-A, MMP28 etc. Therefore, HIF-1α may be a potential target for the gene targeted therapy of SCLC.
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Affiliation(s)
- Jun Wan
- Department of Thoracic Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Huiping Chai
- Department of Thoracic Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Zaicheng Yu
- Department of Thoracic Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Wei Ge
- Department of Thoracic Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Ningning Kang
- Department of Thoracic Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Wanli Xia
- Department of Thoracic Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Yun Che
- Department of Thoracic Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
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Belli C, Anand S, Tassi G, Fennell D, Mutti L. Translational therapies for malignant pleural mesothelioma. Expert Rev Respir Med 2010; 4:249-60. [PMID: 20406091 DOI: 10.1586/ers.10.17] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Malignant pleural mesothelioma is a highly invasive tumor arising from the mesothelial cells of serosal surfaces. Several chemotherapeutic agents have been tested for the treatment of this disease and doublet cisplatin with antifolates has been demonstrated to have significant efficacy in Phase III studies. However, the benefit of these treatments remains poor and the median survival time of patients is low, ranging between 9 and 17 months. Targeted therapies are being developed in oncology and emerging evidence suggests that they offer disease control in several tumors. This article reviews the knowledge on the malignant pleural mesothelioma molecular pathway and focuses on results of clinical trials conducted on this devastating disease.
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Affiliation(s)
- Carmen Belli
- Oncology Department, San Raffaele Scientific Institute, Via Olgettina 60, 20132 Milan, Italy.
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13
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Fractal analysis of vascular networks: Insights from morphogenesis. J Theor Biol 2010; 262:614-33. [DOI: 10.1016/j.jtbi.2009.10.037] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Revised: 10/20/2009] [Accepted: 10/29/2009] [Indexed: 11/17/2022]
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Sprindzuk M, Dmitruk A, Kovalev V, Bogush A, Tuzikov A, Liakhovski V, Fridman M. Computer-aided Image Processing of Angiogenic Histological. J Clin Med Res 2009; 1:249-61. [PMID: 22481986 PMCID: PMC3311439 DOI: 10.4021/jocmr2009.12.1274] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2009] [Indexed: 12/11/2022] Open
Abstract
UNLABELLED This article reviews the questions regarding the image evaluation of angiogeneic histological samples, particularly the ovarian epithelial cancer. Review is focused on the principles of image analysis in the field of histology and pathology. The definition, classification, pathogenesis and angiogenesis regulation in the ovaries are also briefly discussed. It is hoped that the complex image analysis together with the patient's clinical parameters will allow an acquiring of a clear pathogenic picture of the disease, extension of the differential diagnosis and become a useful tool for the evaluation of drug effects. The challenge of the assessment of angiogenesis activity is the heterogeneity of several objects: parameters derived from patient's anamnesis as well as of pathology samples. The other unresolved problems are the subjectivity of the region of interest selection and performance of the whole slide scanning. KEYWORDS Angiogenesis; Image processing; Microvessel density; Cancer; Pathology.
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Affiliation(s)
- Matvey Sprindzuk
- United Institute of Informatics Problems, National Academy of Sciences of Belarus, Belarus
| | - Alexander Dmitruk
- United Institute of Informatics Problems, National Academy of Sciences of Belarus, Belarus
| | - Vassili Kovalev
- United Institute of Informatics Problems, National Academy of Sciences of Belarus, Belarus
| | - Armen Bogush
- United Institute of Informatics Problems, National Academy of Sciences of Belarus, Belarus
| | - Alexander Tuzikov
- United Institute of Informatics Problems, National Academy of Sciences of Belarus, Belarus
| | - Victor Liakhovski
- United Institute of Informatics Problems, National Academy of Sciences of Belarus, Belarus
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Goutzanis LP, Papadogeorgakis N, Pavlopoulos PM, Petsinis V, Plochoras I, Eleftheriadis E, Pantelidaki A, Patsouris E, Alexandridis C. Vascular fractal dimension and total vascular area in the study of oral cancer. Head Neck 2009; 31:298-307. [PMID: 19073004 DOI: 10.1002/hed.20959] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Microvessel quantification has been studied extensively as a factor reflecting angiogenesis in various malignant tumors. The aim of our study was to evaluate the vascular fractal dimension and the immunohistochemically positive total vascular area in oral cavity carcinomas in order to assess their potential value as factors reflecting angiogenesis. METHODS Histologic sections from 48 carcinomas and 17 nonmalignant mucosa specimens were evaluated by image analysis using fractal analysis software. Total vascular area was also quantified. RESULTS Carcinomas presented higher mean values of vascular fractal dimension and total vascular area compared to normal mucosa. The difference for the vascular fractal dimension was statistically significant. CONCLUSIONS This study provides evidence that vascular fractal dimension could be used as a reliable factor reflecting angiogenesis in oral squamous cell carcinoma and that there are several statistically significant correlations among total vascular area, vascular fractal dimension, nuclear size, and clinicopathologic factors.
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Affiliation(s)
- Lampros P Goutzanis
- Department of Oral and Maxillofacial Surgery, Evangelismos General Hospital of Athens, Dental School, University of Athens, Athens, Greece.
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Doukas CN, Maglogiannis I, Chatziioannou AA. Computer-supported angiogenesis quantification using image analysis and statistical averaging. ACTA ACUST UNITED AC 2008; 12:650-7. [PMID: 18779080 DOI: 10.1109/titb.2008.926463] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Angiogenesis is a complex process, involving multiple crosstalks among tumor, endothelial, and stromal cells in order to establish a biochemical network for oxygen and nutrients supply, necessary for the promotion of tumor growth. In this sense, measuring angiogenic activity is considered an informative marker of tumor growth or its inhibition. One of the most popular testbeds for the study of angiogenesis is developing chick embryo and its chorioallantoic membrane (CAM). In this paper, an automated image analysis and statistical processing method for the extraction of features informative for the angiogenic process is proposed and a Web-based tool that provides an unbiased quantification of the microvessel density and growth in angiogenic CAM images is described. The applicability of the tool is tested in two datasets, concerning: 1) the quantification and subsequent detection of tumor growth at different stages of embryonic development and 2) the inhibitory effect of dexamethasone (i.e., an inhibitor of the angiogenesis phenomenon) over a series of CAM samples. Experimental results presented in this paper indicate the efficiency of the automated angiogenesis quantification method regarding both tumor growth and inhibition detection.
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Affiliation(s)
- Charalampos N Doukas
- Department of Information and Communication Systems Engineering, University of the Aegean, 81100 Mytilene, Greece.
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Doukas CN, Maglogiannis I, Chatziioannou A, Papapetropoulos A. Automated angiogenesis quantification through advanced image processing techniques. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2008; 2006:2345-8. [PMID: 17946107 DOI: 10.1109/iembs.2006.260675] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Angiogenesis, the formation of blood vessels in tumors, is an interactive process between tumor, endothelial and stromal cells in order to create a network for oxygen and nutrients supply, necessary for tumor growth. According to this, angiogenic activity is considered a suitable method for both tumor growth or inhibition detection. The angiogenic potential is usually estimated by counting the number of blood vessels in particular sections. One of the most popular assay tissues to study the angiogenesis phenomenon is the developing chick embryo and its chorioallantoic membrane (CAM), which is a highly vascular structure lining the inner surface of the egg shell. The aim of this study was to develop and validate an automated image analysis method that would give an unbiased quantification of the micro-vessel density and growth in angiogenic CAM images. The presented method has been validated by comparing automated results to manual counts over a series of digital chick embryo photos. The results indicate the high accuracy of the tool, which has been thus extensively used for tumor growth detection at different stages of embryonic development.
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Affiliation(s)
- Charlampos N Doukas
- Department of Information & Communication Systems Engineeering, University of the Aegean, Samos, Greece.
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Moreno MJ, Ball M, Andrade MF, McDermid A, Stanimirovic DB. Insulin-like growth factor binding protein-4 (IGFBP-4) is a novel anti-angiogenic and anti-tumorigenic mediator secreted by dibutyryl cyclic AMP (dB-cAMP)-differentiated glioblastoma cells. Glia 2006; 53:845-57. [PMID: 16586492 DOI: 10.1002/glia.20345] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
cAMP has been shown to reverse the transformed phenotype of various cancer cells. Human glioblastoma U87MG cells exposed to 500 microM dB-cAMP for 6 days showed reduced proliferation, attenuated invasiveness, and inability to induce angiogenic responses in human brain endothelial cells (HBECs) grown in Matrigeltrade mark. VEGF was the principal mediator of angiogenic actions of U87MG conditioned media (CM), since VEGF neutralizing antibody completely inhibited U87MG-induced angiogenic responses and no detectable levels of IGF, bFGF, and PlGF were found in U87MG CM. VEGF release was induced ( approximately 20%) in dB-cAMP-treated U87MG cells, suggesting a simultaneous induction of anti-angiogenic mediators. Down-stream effectors of dB-cAMP actions in U87MG were investigated by microarray gene expression analysis. Detected increases in differentiation genes, staniocalcin-1 and Wnt-5a, and angiogenesis-related genes, PAI-1, SPARC, IGFBP-4, IGFBP-7, PAPP-A, and PRSS-11 in dB-cAMP-treated U87MG cells were validated by real-time PCR, Western blot, and/or ELISA. A subsequent series of experiments identified IGFBP-4 as the principal anti-angiogenic mediator secreted by glioblastoma cells in response to dB-cAMP. Human recombinant IGFBP-4 inhibited the angiogenic response of HBEC induced by U87MG CM, whereas anti-human IGFBP-4 antibody restored the pro-angiogenic activity of dB-cAMP-treated U87MG CM. Since neither U87MG nor HBEC cells secreted detectable levels of IGF-I, and there are no known cellular IGFBP-4 receptors, the anti-angiogenic effect of IGFBP-4 was likely IGF-I-independent and indirect. IGFBP-4 also antagonized angiogenic effects of VEGF(165), PlGF, and bFGF, and reduced U87MG colony formation in soft-agar. IGFBP-4 is a novel dB-cAMP-induced anti-angiogenic and anti-tumorigenic mediator that may be a promising candidate for glioblastoma therapy.
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Affiliation(s)
- María J Moreno
- Cerebrovascular Research Group, Institute for Biological Sciences, National Research Council of Canada, Ottawa, Ontario, Canada.
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Abstract
A large body of preclinical evidence suggests that angiogenesis plays a key role in the pathogenesis of malignant mesothelioma. Several mediators of angiogenesis seem to be autocrine growth factors in mesothelioma, and in preclinical models, agents that target angiogenesis produce tumor regression. Several clinical trials are currently evaluating the efficacy of inhibitors of angiogenesis in mesothelioma. This article details the preliminary results of these trials and future directions.
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Affiliation(s)
- Jonathan E Dowell
- University of Texas-Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8852, USA.
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Tjalma WAA, Van Waes TR, Van den Eeden LEM, Bogers JJPM. Role of human papillomavirus in the carcinogenesis of squamous cell carcinoma and adenocarcinoma of the cervix. Best Pract Res Clin Obstet Gynaecol 2005; 19:469-83. [PMID: 16150388 DOI: 10.1016/j.bpobgyn.2005.02.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Human papillomavirus (HPV) infection is the most common sexually transmitted disease, with more than 80% of the population infected at some time in their life. In rare cases, this infection may lead to cervical cancer. Virtually all squamous cell carcinomas and the overwhelming majority of adenocarcinomas of the cervix are HPV positive. HPV integration in the genome will lead to inactivation of the p53 pathway and the Rb pathway. Integration is essential for the onset of cervical carcinogenesis, but is probably not sufficient for progression to invasive cervical cancers. It is likely that several cofactors, such as environmental, viral and host-related factors, are necessary for the development of cervical cancer. There are several similarities and differences between the two major histological types. This article will address the role of HPV in cervical carcinogenesis as well as the molecular biology involved in the process.
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Affiliation(s)
- W A A Tjalma
- Department of Gynecology and Gynecologic Oncology, University Hospital Antwerpen, Universiteit Antwerpen, Wilrijkstraat 10, 2650 Antwerp, Belgium.
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