Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 36
Filter
1.
J Helminthol ; 90(3): 294-7, 2016 May.
Article in English | MEDLINE | ID: mdl-25772632

ABSTRACT

The air sacs of free-ranging birds of prey (n= 652) from southern Italy, including 11 species of Accipitriformes and six of Falconiforms, were examined for infections with Serratospiculum tendo (Nematoda: Diplotriaenoidea). Of the 17 species of birds examined, 25 of 31 (80.6%) peregrine falcons (Falco peregrinus) from Calabria Region and a single northern goshawk (Accipiter gentilis) from Campania Region were infected with S. tendo, suggesting a strong host specificity for the peregrine falcon. The northern goshawk and 18 of 25 infected peregrine falcons showed cachexia and all infected birds had bone fractures. At gross examination, air sacculitis and pneumonia were the most common lesions in infected birds. Microscopically, the air-sac walls showed thickening of the smooth muscle cells, resulting in a papillary appearance, along with hyperplasia of the mesothelium and epithelium, and foci of plasma cell infiltration and macrophages associated with several embryonated eggs and adult parasites. Extensive areas of inflammation were found in the lungs, characterized by lymphocytes, macrophages and fibroblasts surrounding embryonated eggs. The northern goshawk also had detachment of the dextral lung with several necrotic foci. In this case, the death of the bird was directly attributed to S. tendo infection. Lesions and pathological changes observed here suggest that S. tendo can cause disease.


Subject(s)
Bird Diseases/epidemiology , Bird Diseases/parasitology , Raptors , Spirurida Infections/veterinary , Spirurida/isolation & purification , Air Sacs/parasitology , Animals , Bird Diseases/pathology , Female , Histocytochemistry , Italy , Lung/pathology , Male , Prevalence , Spirurida Infections/epidemiology , Spirurida Infections/parasitology , Spirurida Infections/pathology
2.
Res Vet Sci ; 100: 182-8, 2015 Jun.
Article in English | MEDLINE | ID: mdl-25816929

ABSTRACT

Endothelins and their receptors have been implicated in numerous diseases and have recently emerged as relevant players in a variety of malignancies. Tumours overexpress the Endothelin-1 (ET-1) and the Endothelin-A receptors (ETAR) and their interaction enhances tumour growth and metastasis by promoting tumour cell survival, proliferation and angiogenesis. In this study we have evaluated the expression of ET-1 and ETAR in 50 canine mammary tumours, compared to normal controls. Results demonstrated a progressive increase in ET-1 and ETAR expression from benign tumour to grade 1 and to grade 2 malignant mammary tumours with a decrease of expression in grade 3 carcinomas. Co-localization of ET-1 and ETAR was observed in benign mammary tumours and in G1 and G2 carcinomas, while absent in G3 carcinomas. Concluding, ET-1/ETAR can be considered reliable markers for evaluating malignancy of canine mammary tumours and could have importance for the development of specific anticancer therapies.


Subject(s)
Carcinoma/veterinary , Dog Diseases/metabolism , Endothelin-1/metabolism , Mammary Neoplasms, Animal/metabolism , Receptor, Endothelin A/metabolism , Animals , Blotting, Western/veterinary , Carcinoma/etiology , Carcinoma/metabolism , Dog Diseases/etiology , Dogs , Female , Fluorescent Antibody Technique/veterinary , Immunohistochemistry/veterinary , Mammary Neoplasms, Animal/etiology
4.
J Comp Pathol ; 142(2-3): 95-108, 2010.
Article in English | MEDLINE | ID: mdl-19818448

ABSTRACT

Four hundred bovine urothelial tumours and tumour-like lesions were classified in accordance with the 2004 World Health Organization (WHO) morphological classification for human urothelial tumours. The spectrum of neoplastic lesions of the urinary bladder of cattle is becoming wider and bovine urothelial tumours share striking morphological features with their human counterparts. A classification system based on the WHO scheme would also be appropriate for the classification of bovine bladder tumours. Bovine urothelial tumours are most often multiple. Four distinct growth patterns of bovine urothelial tumours and tumour-like lesions are recognized: flat, exophytic or papillary, endophytic and invasive. Carcinoma in situ (CIS) is the most common flat urothelial lesion, accounting for approximately 4% of urothelial tumours. CIS is detected adjacent to papillary and invasive tumours in 80-90% of cases. Approximately 3% of papillary lesions are papillomas and approximately 5% are 'papillary urothelial neoplasms of low malignant potential' (PUNLMP). Low-grade carcinoma is the most common urothelial tumour of cattle. High-grade carcinomas, and low and high-grade invasive tumours, are less commonly seen. Bovine papillomavirus (BPV) infection and ingestion of bracken fern both play a central role in carcinogenesis of these lesions.


Subject(s)
Carcinoma in Situ/veterinary , Carcinoma, Papillary/veterinary , Cattle Diseases , Papilloma/veterinary , Urinary Bladder Neoplasms/veterinary , Urothelium/pathology , Animals , Carcinoma in Situ/pathology , Carcinoma, Papillary/pathology , Cattle , Papilloma/pathology , Urinary Bladder Neoplasms/pathology
5.
Cytogenet Genome Res ; 120(1-2): 183-7, 2008.
Article in English | MEDLINE | ID: mdl-18467846

ABSTRACT

In recent years some buffalo farms in Campania have reported the birth of calves with limb malformation, especially with transversal hemimelia. We investigated 20 Mediterranean Italian buffaloes (8 males and 12 females) from one day to six months of age, of which 10 were affected by transversal hemimelia (group 1) and 10 were healthy controls (group 2). The following clinical and radiological patterns were observed in the malformed animals: hind limbs amputated, the right amputated off the second tarsus bones and the left amputated off the proximal epiphysis metatarsus, and the right thoracic limb hypoplasic (1 female); left hind limb amputated off the proximal epiphysis metatarsus (2 females and 1 male); left hind limb amputated off the third tarsus bones (1 female); left hind limb amputated off the tibia (1 female and 1 male); left hind limb amputated off the distal epiphysis metatarsus (1 female); left hind limb amputated off the first phalanx (1 male); right hind limb amputated off the proximal epiphysis metatarsus (1 male). In their malformed limbs all the animals presented more or less developed outlines of claws. The mean rate of SCE/cell in animals with transversal hemimelia was 8.80 +/- 3.19, that of the controls 6.61 +/- 2.73. The difference was statistically significant (P < 0.001).


Subject(s)
Buffaloes/genetics , Ectromelia/veterinary , Sister Chromatid Exchange/genetics , Animals , Chromosomal Instability/genetics , Ectromelia/diagnostic imaging , Ectromelia/genetics , Ectromelia/pathology , Female , Italy , Male , Mediterranean Region , Radiography
6.
Vet Res Commun ; 31(8): 1005-11, 2007 Nov.
Article in English | MEDLINE | ID: mdl-17279466

ABSTRACT

The assessment of nuclear area and nuclear shape by morphometric analysis, has been investigated in 40 canine mammary carcinomas in relation to their metastatic behaviour to regional lymph-nodes. The tumours were reviewed by two experienced pathologists blinded regarding their lymph-node status, and were classified according to the histogenetically based criteria suggested by Benjamin et al. (1999). Twenty of these tumours showed lymph-node metastases (node-positive), and the other twenty were node-negative. Node-positive tumours included 6 simple adenocarcinomas, 10 ductular carcinomas, 2 anaplastic carcinomas and 2 carcinomas in mixed tumours; node-negative tumours included 18 adenocarcinomas %96, 10 simple adenocarcinomas, 8 complex adenocarcinomas %96, and 2 carcinomas in mixed tumours. Node-positive tumours showed MNA and mean SDA values significantly higher (p<0.001) than node-negative carcinomas. Data of this study, seems to confirm the importance of an histogenetically based classification in canine mammary tumours, also suggesting that morphometry may increase our prognostic performances allowing a reproducible method for detecting individual tumours with higher metastatic potential.


Subject(s)
Dog Diseases/pathology , Lymph Nodes/pathology , Mammary Neoplasms, Animal/pathology , Animals , Dogs , Female , Histocytochemistry , Image Processing, Computer-Assisted , Lymphatic Metastasis
7.
Eur J Histochem ; 50(2): 125-30, 2006.
Article in English | MEDLINE | ID: mdl-16864123

ABSTRACT

The aim of this study was to evaluate whether morphometrical analysis can be of diagnostic value for canine acanthomatous ameloblastoma. We calculated, by means of an automated image analyser, some morphometric nuclear parameters, in particular: mean nuclear area (MNA), mean nuclear perimeter (MNP), maximum and minimum diameters (MDx and MDm) coefficient of variation of the nuclear area (NACV), largest to smallest dimension ratio (LS ratio), and form factor (FF), in 8 canine acanthomatous ameloblastomas, and we compared these morphometric data to those of 13 squamous cell carcinomas of canine gingiva. The results indicated a progressive increase of the MNA, NACV, MNP and MDm proceeding from acanthomatous ameloblastomas (MNA: 42.11+/-8.74; NACV: 28,36+/-7,23; MNP: 24.18+/- 2.68; MDm: 5.69+/-0.49) to squamous cell carcinomas (MNA:49,69+/-9,10; NACV: 30,89+/-7,75; MNP: 25.63+/-2.54; MDm: 6.64+/-0.73). On the contrary, the LS ratio and the FF resulted greater in acanthomatous ameloblastomas (LS ratio: 1,63+/-0,12; FF: 1,13+/-0,002) than in SCCs (LS ratio: 1,40+/-0,12; FF:0.91+/-0.38). Moreover, the MNA, MNP,MDx and MDm resulted similar (MNA: p=0.89; MNP: p=0,65; MDm: p=0,16; MDx: p=0,13) in a subset of four acanthomatous ameloblastomas with cellular atypia (MNA:49,01+/-6,88; MNP: 26,28+/-1,99; MDm: 6.08+/-0.41; MDx: 10.18+/-0.88) and in squamous cell carcinomas (MNA:49.69+/-9,10; MNP: 25.63+/-2.54; MDm: 6.64+/-0.73; MDx: 9.26+/-1.05). While the NACV values resulted higher in typical acanthomatous ameloblastoma (29,99+/-6,06) than in atypical acanthomatous ameloblastoma (26,74+/-8,84) and similar to those of the SCCs (30,89+/-7,75). These results seem to confirm that acanthomatous ameloblastoma is a malignant or potentially malignant lesion and emphasizes that nuclear morphometry analysis can be an useful diagnostic and prognostic method in canine oral pathology.


Subject(s)
Ameloblastoma/veterinary , Carcinoma, Squamous Cell/veterinary , Cell Nucleus/pathology , Dog Diseases/diagnosis , Gingiva/pathology , Jaw Neoplasms/veterinary , Ameloblastoma/diagnosis , Ameloblastoma/pathology , Animals , Carcinoma, Squamous Cell/diagnosis , Carcinoma, Squamous Cell/pathology , Cell Nucleus/ultrastructure , Dog Diseases/pathology , Dogs , Gingiva/ultrastructure , Image Cytometry/methods , Jaw Neoplasms/diagnosis , Jaw Neoplasms/pathology
8.
Vet Rec ; 158(20): 690-4, 2006 May 20.
Article in English | MEDLINE | ID: mdl-16714433

ABSTRACT

Bone marrow aspiration smears from 15 dogs naturally infected with leishmania were evaluated. Three of the dogs showed no clinical signs, six had up to three clinical signs and six had more than three. The most common pathological features of the bone marrow were megakaryocytic dysplasia in 10 of the dogs, erythrophagocytosis in eight, erythroid dysplasia in two and emperipolesis in two. The megakaryocytic and erythroid dysplasia were probably related to an increased number of marrow macrophages producing high levels of tumour necrosis factor alpha and interferon gamma. Six of the dogs with clinical signs showed bone marrow dysplastic features and erythrophagocytosis, suggesting that leishmaniosis could be the unique cause of both conditions.


Subject(s)
Bone Marrow Cells/cytology , Bone Marrow/pathology , Dog Diseases/pathology , Leishmaniasis/veterinary , Animals , Bone Marrow/parasitology , Bone Marrow Cells/pathology , Case-Control Studies , Dogs , Erythrocytes , Female , Immunohistochemistry/veterinary , Leishmaniasis/pathology , Male , Megakaryocytes/pathology
9.
J Comp Pathol ; 133(2-3): 209-11, 2005.
Article in English | MEDLINE | ID: mdl-16045919

ABSTRACT

Thirty-five canine cutaneous mast cell tumours (CCMCTs) were analysed by computerized nuclear morphometry. In each case, the nuclei of at least 100 neoplastic cells were measured, and the mean nuclear area (MNA), mean nuclear perimeter (MNP) and mean nuclear form factor (FF) were calculated. Significant differences in respect of MNA and MNP occurred between tumours of grades I and III and between those of grades II and III (P<0.01) but not between tumours of grades I and II (P>0.01). No significant differences in respect of FF were observed between tumours of different grades. The results obtained indicate that nuclear morphometric analysis may assist in the grading of CMCTs.


Subject(s)
Cell Nucleus/pathology , Dog Diseases/pathology , Mast-Cell Sarcoma/veterinary , Skin Neoplasms/veterinary , Animals , Dog Diseases/surgery , Dogs , Female , Male , Mast-Cell Sarcoma/classification , Mast-Cell Sarcoma/secondary , Neoplasm Recurrence, Local/veterinary , Neoplasm Staging/veterinary , Skin Neoplasms/classification , Skin Neoplasms/pathology
10.
Vet Pathol ; 41(6): 608-11, 2004 Nov.
Article in English | MEDLINE | ID: mdl-15557070

ABSTRACT

The aim of this study was to correlate nuclear morphometric features with animal and human World Health Organization International Histological Classifications in canine seminomas. Twenty-three canine seminomas were classified, according to Animal World Health Organization International Histological Classification as intratubular, intratubular with signs of invasion, or diffuse and according to Human World Health Organization International Histological Classification criteria as spermatocytic and typical. The morphonuclear characteristics of tumors were quantitatively evaluated by means of digital cell image analyses of hematoxylin and eosin-stained nuclei. In particular, the mean nuclear area, mean nuclear perimeter, mean nuclear form factor, and their respective standard deviations were calculated. The relationship between the different variables and the tumor histologic types was assessed. On the basis of animal and human classification systems, statistically significant differences were observed only between intratubular seminomas with signs of invasion and the other two types and between spermatocytic and typical seminomas, respectively. In humans, it is well known that typical seminomas are more common and aggressive than spermatocytic ones. In our study, the canine seminomas classified as typical showed significantly larger and more variable nuclear area and perimeter than spermatocytic seminomas. These results support the opinion that most canine seminomas correspond to human spermatocytic seminomas and could explain the benign behavior of canine seminomas, which derive from a more differentiated type of germ cell.


Subject(s)
Cell Nucleus/pathology , Dog Diseases/pathology , Seminoma/veterinary , Testicular Neoplasms/veterinary , Animals , Dogs , Humans , Male , Seminoma/classification , Seminoma/pathology , Testicular Neoplasms/pathology , World Health Organization
12.
J Comp Pathol ; 130(2-3): 99-104, 2004.
Article in English | MEDLINE | ID: mdl-15003465

ABSTRACT

Vascular endothelial growth factor (VEGF) induces endothelial cell proliferation, and the beginning of angiogenesis, by interacting with specific endothelial receptors termed VEGFR-1 (Flt-1) and VEGFR-2 (Flk-1). In this study, Flk-1 expression was evaluated immunohistochemically in 10 benign and 40 malignant canine mammary tumours. There was immunolabelling of endothelial cells located within the neoplastic proliferation and at the infiltrating periphery, and also of neoplastic cells. The number of positive endothelial and neoplastic cells, was higher in malignant than in benign tumours. Moreover, in the malignant tumours, expression of Flk-1 increased from well to less differentiated phenotypes (grade 1-3). The presence of VEGF receptor on neoplastic cells suggests that VEGF has an autocrine function in which neoplastic cells act as both VEGF producers and target cells. Thus, in malignant tumours, VEGF may contribute to neoplastic growth by inducing angiogenesis and by stimulating the proliferation of neoplastic cells.


Subject(s)
Dog Diseases/pathology , Mammary Neoplasms, Animal/pathology , Vascular Endothelial Growth Factor Receptor-2/biosynthesis , Animals , Biomarkers, Tumor/analysis , Dogs , Immunohistochemistry , Mammary Neoplasms, Animal/metabolism , Microscopy, Confocal , Neoplasm Invasiveness/pathology , Vascular Endothelial Growth Factor A/metabolism
13.
Acta Myol ; 23(3): 151-3, 2004 Dec.
Article in English | MEDLINE | ID: mdl-15938572

ABSTRACT

Neosporosis was diagnosed in a 2-month-old dog by indirect immunofluorescence antibody test (IFAT) and confirmed by means of histopathology and immunohistochemistry. The associated myositis was characterized by Major Histocompatibility Complex expression on some muscle fibres. This finding indicates an immunological activation, of the muscle cells that, acquiring Major Histocompatibility Complex expression, may, in some way, contribute to antigen presentation. A possible role of these glycoproteins in the pathogenesis of Neospora-associated myositis is discussed.


Subject(s)
Coccidiosis/veterinary , Dog Diseases/metabolism , Histocompatibility Antigens Class II/metabolism , Histocompatibility Antigens Class I/metabolism , Myositis/veterinary , Neospora , Animals , Coccidiosis/metabolism , Coccidiosis/pathology , Dog Diseases/parasitology , Dog Diseases/pathology , Dogs , Male , Muscle, Skeletal/metabolism , Muscle, Skeletal/pathology , Myositis/metabolism , Myositis/parasitology
14.
J Comp Pathol ; 128(4): 252-9, 2003 May.
Article in English | MEDLINE | ID: mdl-12834608

ABSTRACT

Angiogenesis, which assists in supplying the nutritional and respiratory needs of proliferating cells, is essential for tumour growth. Angiogenic control is complex, involving a network of cytokines, in particular vascular endothelial growth factor (VEGF), a potent endothelial cell mitogen which also stimulates neoplastic cell proliferation. The purpose of this study was to evaluate VEGF expression and microvessel density (number of microvessels per mm(2)), in canine seminomas. VEGF expression and microvessel density were higher in seminomas than in normal testicular tissue; both parameters were higher in diffuse tumours than in intratubular tumours. These data demonstrate an increase in angiogenesis in the more malignant histological types of seminoma and suggest that both VEGF and microvessel density are useful criteria for evaluating the intrinsic malignancy and growth potential of canine testicular tumours.


Subject(s)
Dog Diseases/pathology , Neovascularization, Pathologic/veterinary , Seminoma/veterinary , Testicular Neoplasms/veterinary , Animals , Cell Count/veterinary , Dog Diseases/metabolism , Dogs , Endothelial Growth Factors/metabolism , Immunoenzyme Techniques/veterinary , Intercellular Signaling Peptides and Proteins/metabolism , Lymphokines/metabolism , Male , Microcirculation , Neovascularization, Pathologic/metabolism , Neovascularization, Pathologic/pathology , Seminoma/blood supply , Seminoma/secondary , Testicular Neoplasms/blood supply , Testicular Neoplasms/pathology , Testis/blood supply , Vascular Endothelial Growth Factor A , Vascular Endothelial Growth Factors
15.
J Comp Pathol ; 127(2-3): 114-7, 2002.
Article in English | MEDLINE | ID: mdl-12354521

ABSTRACT

To investigate the diagnostic and prognostic value of nuclear morphometry in squamous cell carcinomas (SCCs) of canine skin, histological samples from 15 dogs were retrospectively analysed by computerized nuclear morphometry. In each case, the nuclei of at least 100 neoplastic cells were measured, and the mean nuclear area (MNA), standard deviation of MNA (SDa), mean nuclear perimeter (MNP), standard deviation of MNP (SDp), nuclear form factor (FF), and standard deviation of FF (SDf) were calculated. The morphometric data were examined in relation to tumour histological grade. No statistical differences were found between the different grades of SCC in terms of the mean values of SDa, SDp, FF or SDf. The MNA values, however, differed significantly between grades: I and III; I and IV; II and III; II and IV. The MNP values differed significantly between grades: I and III; I and IV; II and IV. The results indicate that nuclear morphometry analysis is a simple and reproducible method that could be used to provide objective diagnostic criteria for cutaneous SCCs in the dog.


Subject(s)
Carcinoma, Squamous Cell/veterinary , Cell Nucleus/pathology , Dog Diseases/pathology , Skin Neoplasms/veterinary , Animals , Carcinoma, Squamous Cell/pathology , Dogs , Female , Image Cytometry/veterinary , Image Processing, Computer-Assisted/methods , Male , Reproducibility of Results , Retrospective Studies , Skin Neoplasms/pathology
16.
Vet Pathol ; 39(4): 488-93, 2002 Jul.
Article in English | MEDLINE | ID: mdl-12126152

ABSTRACT

Vascular endothelial growth factor (VEGF) is a dimeric protein that stimulates angiogenesis in vitro and in vivo by inducing endothelial cell proliferation and migration. In this immunohistochemical study, VEGF-immunolabeled cells were counted in a series of 10 benign and 40 malignant canine mammary tumors. The morphologic pattern of VEGF positivity (intensity of immunolabeling and VEGF granule size and distribution) was also evaluated. A low number of cells weakly positive for VEGF with few and small granules polarized to the luminal pole was detected in benign neoplasms. In contrast, in malignancies a high number of VEGF-positive cells had strong immunolabeling, often with large granules found diffusely in the cytoplasm. This level of immunolabeling was more pronounced in the less differentiated, more malignant phenotypes (grade 3). Macrophages, which can synthesize VEGF, were strongly positive. Stromal and myoepithelial cells were negative. VEGF data were correlated statistically with intratumoral microvessel density (number of newly formed microvessels) and both measures were greater in less differentiated malignant neoplasms, demonstrating that angiogenesis and malignancy increase together. VEGF appears to be a powerful angiogenic factor in canine mammary tumors.


Subject(s)
Dog Diseases/metabolism , Endothelial Growth Factors/biosynthesis , Intercellular Signaling Peptides and Proteins/biosynthesis , Lymphokines/biosynthesis , Mammary Neoplasms, Animal/blood supply , Neovascularization, Pathologic/veterinary , Animals , Dog Diseases/pathology , Dogs , Endothelial Growth Factors/genetics , Female , Gene Expression Regulation, Neoplastic , Image Processing, Computer-Assisted , Immunohistochemistry/veterinary , Intercellular Signaling Peptides and Proteins/genetics , Lymphokines/genetics , Mammary Neoplasms, Animal/metabolism , Mammary Neoplasms, Animal/pathology , Neovascularization, Pathologic/metabolism , Neovascularization, Pathologic/pathology , Vascular Endothelial Growth Factor A , Vascular Endothelial Growth Factors
17.
J Comp Pathol ; 126(4): 271-6, 2002 May.
Article in English | MEDLINE | ID: mdl-12056775

ABSTRACT

An immunohistochemical approach was used to examine the expression of MMP-2 and the activator MT1-MMP in a series of 50 canine mammary carcinomas of different histotype and stage. MMP-2 and MT1-MMP were mainly expressed in the cytoplasm of carcinoma cells and in fibroblasts. Immunolabelling for both MMP-2 and MT1-MMP was also seen on the tumour cell membranes. This labelling pattern showed no significant association with either the histological sub-type or stage of the carcinomas. Therefore, although distinct patterns of expression of MMP-2 and MT-MMP1 were shown by these carcinomas, functional studies by means of zymography would be required to provide useful information on tumour behaviour.


Subject(s)
Carcinoma/veterinary , Dog Diseases/enzymology , Mammary Neoplasms, Animal/enzymology , Matrix Metalloproteinase 2/biosynthesis , Metalloendopeptidases/biosynthesis , Animals , Breast/anatomy & histology , Breast/enzymology , Carcinoma/enzymology , Carcinoma/secondary , Dog Diseases/pathology , Dogs , Female , Immunoenzyme Techniques/veterinary , Mammary Neoplasms, Animal/pathology , Matrix Metalloproteinases, Membrane-Associated
18.
J Comp Pathol ; 125(2-3): 117-21, 2001.
Article in English | MEDLINE | ID: mdl-11578126

ABSTRACT

In a number of recent papers, the intratumoral microvessel density (iMVD) has been described as a promising new prognostic factor. In this study, the angiogenic rate was evaluated immunohistochemically for platelet endothelial cell adhesion molecule (CD31) in 15 squamous cell carcinomas (SCCs) of canine skin. Computer image analysis was used to measure the iMVD, which increased progressively from differentiation grade I to IV. The iMVD was consistently and significantly greater in the poorly differentiated SCC cases. The correlation of angiogenesis data with differentiation grade of canine SCCs suggests that the iMVD value may provide an additional criterion for evaluating the intrinsic malignancy and growth potential of such tumours.


Subject(s)
Carcinoma, Squamous Cell/blood supply , Carcinoma, Squamous Cell/veterinary , Dog Diseases/pathology , Neovascularization, Pathologic/veterinary , Skin Neoplasms/blood supply , Skin Neoplasms/veterinary , Animals , Carcinoma, Squamous Cell/metabolism , Dog Diseases/metabolism , Dogs , Female , Image Processing, Computer-Assisted , Male , Microcirculation/metabolism , Microcirculation/pathology , Neoplasm Staging/veterinary , Neovascularization, Pathologic/metabolism , Neovascularization, Pathologic/pathology , Platelet Endothelial Cell Adhesion Molecule-1/metabolism , Skin Neoplasms/metabolism
19.
J Comp Pathol ; 123(2-3): 141-5, 2000.
Article in English | MEDLINE | ID: mdl-11032667

ABSTRACT

The expression of vascular endothelial growth factor (VEGF) was evaluated immunohistochemically in 20 basal cell tumours (BCTs) and 15 squamous cell carcinomas (SCCs) of canine skin. VEGF was identified in all the SCCs and was particularly striking in those occurring on the toe. On the other hand, VEGF was absent in the great majority of BCTs, occurring only in those of the solid type. The results suggest that presence of VEGF is a useful additional criterion for evaluating malignancy and growth potential in tumours of these types.


Subject(s)
Carcinoma, Basal Cell/pathology , Carcinoma, Squamous Cell/pathology , Endothelial Growth Factors/biosynthesis , Lymphokines/biosynthesis , Skin Neoplasms/pathology , Animals , Carcinoma, Basal Cell/metabolism , Carcinoma, Squamous Cell/metabolism , Dogs , Female , Immunohistochemistry , Male , Skin/chemistry , Skin/pathology , Skin Neoplasms/metabolism , Species Specificity , Vascular Endothelial Growth Factor A , Vascular Endothelial Growth Factors
20.
J Comp Pathol ; 123(2-3): 164-70, 2000.
Article in English | MEDLINE | ID: mdl-11032670

ABSTRACT

The expression of the beta1 common chain of the VLA integrin subfamily was evaluated immunohistochemically in a series of five normal and 30 neoplastic canine testicles. The tumours, consisting of seminomas or Sertoli cell tumours, were classified according to WHO criteria as intraductal without signs of invasion, intraductal with signs of invasion, or diffuse. Expression of beta1 integrin decreased progressively from intraductal tumours without signs of invasion, to the diffuse type, in which immunolabelling was generally absent. In a few cases of diffuse neoplasia, groups of neoplastic cells exhibited strong positivity that was not restricted to the basal pole of the cell membrane. These results suggest that the expression of beta1 integrin was related to the histological tumour type, possibly reflecting a specific requirement for a reduction in integrin by neoplastic cells with infiltrative and metastatic potential.


Subject(s)
Integrin beta1/biosynthesis , Testicular Neoplasms/metabolism , Testis/chemistry , Animals , Dogs , Immunohistochemistry , Male , Neoplasm Invasiveness , Seminoma/metabolism , Seminoma/pathology , Sertoli Cell Tumor/metabolism , Sertoli Cell Tumor/pathology , Testicular Neoplasms/pathology , Testis/anatomy & histology
SELECTION OF CITATIONS
SEARCH DETAIL
...