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  • 1
    Electronic Resource
    Electronic Resource
    DNA-ploidy and HPV infection in epithelial lesions of the lower female genital tract (1996)
    Suite 500, 5th Floor, 238 Main Street, Cambridge, Massachusetts, 02142, USA : Blackwell Science Inc.
    International journal of gynecological cancer 6 (1996), S. 0 
    Details
    ISSN: 1525-1438
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: DNA content was related to the type of human papillomaviruses (HPV) in a series of 87 lesions of the lower female genital tract. Nineteen condylomas, 32 biopsies with slight dysplasia, 19 with moderate dysplasia and 17 with severe dysplasia-carcinoma in situ were studied. HPV status was assessed by in situ hybrization (ISH) with biotinylated probes (HPV 6/11, 16/18, 31/35/51) and the polymerase chain reaction (PCR) (HPV 16,18). DNA ploidy was measured by Feulgen DNA cytophotometry. Positivity for HPV by ISH and PCR was obtained in 48% and 59% of the biopsies, respectively. Seventy-eight per cent of the lesions were diploid or tetraploid and the remaining 22% were aneuploid. The percentage of aneuploid DNA increased with the severity of the lesions. By comparing DNA-ploidy and HPV types by ISH, diploid DNA was more frequently found in HPV 6/11 positive lesions (93%) than in HPV 16/18 positive (81%) or HPV 31/35/51 positive (57%). PCR was more sensitive for detecting HPV in aneuploid dysplastic lesions than ISH, probably indicating the HPV copies are scarce in such lesions. In summary, the results indicate some relationship between aneuploidy and HPV types 16/18 and 31/35/51, which supports an oncogenic potential of these subtypes of HPV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1525-1438.1996.06010001.x
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  • 2
    Electronic Resource
    Electronic Resource
    Prognostic significance of p27Kip1, p45Skp2 and Ki67 expression profiles in Merkel cell carcinoma, extracutaneous small cell carcinoma, and cutaneous squamous cell carcinoma (2005)
    Oxford, UK : Blackwell Science Ltd
    Histopathology 46 (2005), S. 0 
    Details
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims:  To compare the immunohistochemical expression of prognostic markers p27Kip1, p45Skp2 and Ki67 in Merkel cell carcinoma (primary neuroendocrine carcinoma of the skin, MCC), small cell neuroendocrine carcinoma of lung and urinary bladder (SNC), and cutaneous squamous cell carcinoma (SCC).Methods and results:  Immunohistochemistry was performed using antibodies directed against p27Kip1, p45Skp2 and Ki67 on 72 tumour cases: 24 MCC, 25 SCC, and 23 SNC (15 from the lung and eight from the urinary bladder). Percentages of positive cells were determined for each marker and statistically analysed. Expression profiles on MCC and SCC were significantly different for all three markers. MCC and SNC exhibited significant similarities in their p27Kip1 and p45Skp2 expression profiles. In contrast, MCC and SNC differed significantly in their Ki67 proliferation indices, which were much higher in SNC. Additionally, MCC cases showed an association between increased proliferation indices and the appearance of local recurrence(s) and/or metastases.Conclusion:  The immunohistochemical profile of MCC differs from that of SCC, in spite of their common oncogenesis and the supposed metaplastic origin of MCC, and resembles that of SNC, except for Ki67 levels, which were higher in the latter (characterized by greater biological aggressiveness). High levels of Ki67 also appear to be a prognostic factor in MCC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2559.2005.02140.x
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  • 3
    Electronic Resource
    Electronic Resource
    Stromal tumours of the gastrointestinal tract: a clinicopathological and ploidy analysis of 33 cases (1994)
    Springer
    Virchows Archiv 424 (1994), S. 19-24 
    Details
    ISSN: 1432-2307
    Keywords: Stromal tumours ; Smooth muscle tumours ; Gastrointestinal tract ; Ploidy ; Flow cytometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The clinicopathological and DNA flow cytometric data of 33 patients with stromal tumours of the gastrointestinal tract (STGIT) were analysed to select pathological features of prognostic value. Tumours had been previously classified as benign (21 cases) or malignant (12 cases). Data relating to poor prognosis statistically were local invasion, pathological grade, size greater than 10 cm, mitotic index (MI) and necrosis. Pathological grade was related to local invasion. Aneuploidy did not correlate with poor survival although a common trend was detected between both. DNA content may help to predict prognosis of STGIT, but its real value has not yet been clearly established. Currently, stage (invasion), size, MI and pathological grade remain the most useful prognostic factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00197388
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  • 4
    Electronic Resource
    Electronic Resource
    Littoral cell angioma with severe thrombocytopenia (2000)
    Springer
    Annals of hematology 79 (2000), S. 46-49 
    Details
    ISSN: 1432-0584
    Keywords: Key words Littoral cell angioma ; Thrombocytopenia ; Spleen ; Autoimmune thrombocytopenic purpura
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Littoral cell angioma (LCA) is a recently described splenic vascular tumor. We present a new case in a 62-year-old woman with severe thrombocytopenia and mild bleeding diathesis, but without palpable splenomegaly. Abdominal ultrasound and magnetic resonance showed multiple nodular images, suggesting splenic hemangiomas. A platelet kinetic study revealed a very short platelet survival. As the spleen was the site of platelet destruction, splenectomy was carried out. Histopathological and immunohistochemical data allowed a final diagnosis of LCA. Following splenectomy, the patient showed a transitory normalization of the platelet counts. Thrombocytopenia then reappeared but was moderate, without hemorrhagic diathesis. A second platelet kinetic study, performed 16 months post-splenectomy, showed hepatic platelet destruction. However, there were no macroscopic hepatic lesions in a second abdominal magnetic resonance study. This case illustrates the difficulties involved in determining the etiology of many peripheral thrombocytopenias.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002770050009
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  • 5
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    Chronic Kidney Disease, Dialysis, and Transplantation: A Companion to Brenner and Rector's The Kidney [Book and Media Reviews] (2012)
    American Medical Association (AMA)
    Details
    Publication Date: 2012-04-25
    Keywords: Renal Diseases, Dialysis, Renal Diseases, Other, Transplantation, Kidney Transplantation
    Print ISSN: 0098-7484
    Electronic ISSN: 1538-3598
    Topics: Medicine
    Published by American Medical Association (AMA)
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  • 6
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    BRCA1 loss activates cathepsin L-mediated degradation of 53BP1 in breast cancer cells (2013)
    Rockefeller University Press
    Details
    Publication Date: 2013-01-22
    Description: Loss of 53BP1 rescues BRCA1 deficiency and is associated with BRCA1-deficient and triple-negative breast cancers (TNBC) and with resistance to genotoxic drugs. The mechanisms responsible for decreased 53BP1 transcript and protein levels in tumors remain unknown. Here, we demonstrate that BRCA1 loss activates cathepsin L (CTSL)–mediated degradation of 53BP1. Activation of this pathway rescued homologous recombination repair and allowed BRCA1-deficient cells to bypass growth arrest. Importantly, depletion or inhibition of CTSL with vitamin D or specific inhibitors stabilized 53BP1 and increased genomic instability in response to radiation and poly(adenosine diphosphate–ribose) polymerase inhibitors, compromising proliferation. Analysis of human breast tumors identified nuclear CTSL as a positive biomarker for TNBC, which correlated inversely with 53BP1. Importantly, nuclear levels of CTSL, vitamin D receptor, and 53BP1 emerged as a novel triple biomarker signature for stratification of patients with BRCA1-mutated tumors and TNBC, with potential predictive value for drug response. We identify here a novel pathway with prospective relevance for diagnosis and customization of breast cancer therapy.
    Electronic ISSN: 1540-8140
    Topics: Biology
    Published by Rockefeller University Press
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  • 7
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    DNA methylation profiling of well-differentiated thyroid cancer uncovers markers of recurrence free survival (2014)
    Wiley-Blackwell
    Details
    Publication Date: 2014-01-01
    Description: Thyroid cancer is a heterogeneous disease with several subtypes characterized by cytological, histological and genetic alterations, but the involvement of epigenetics is not well understood. Here, we investigated the role of aberrant DNA methylation in the development of well-differentiated thyroid tumors. We performed genome-wide DNA methylation profiling in the largest well-differentiated thyroid tumor series reported to date, comprising 83 primary tumors, as well as 8 samples of adjacent normal tissue. The epigenetic profiles were closely related to not only tumor histology but also the underlying driver mutation; we found that follicular tumors had higher levels of methylation, which seemed to accumulate in a progressive manner along the tumorigenic process from adenomas to carcinomas. Furthermore, tumors harboring a BRAF or RAS mutation had a larger number of hypo- or hypermethylation events, respectively. The aberrant methylation of several candidate genes potentially related to thyroid carcinogenesis was validated in an independent series of 52 samples. Furthermore, through the integration of methylation and transcriptional expression data, we identified genes whose expression is associated with the methylation status of their promoters. Finally, by integrating clinical follow-up information with methylation levels we propose etoposide-induced 2.4 and Wilms tumor 1 as novel prognostic markers related to recurrence-free survival. This comprehensive study provides insights into the role of DNA methylation in well-differentiated thyroid cancer development and identifies novel markers associated with recurrence-free survival. © 2013 Wiley Periodicals, Inc.
    Print ISSN: 0020-7136
    Electronic ISSN: 1097-0215
    Topics: Biology , Medicine
    Published by Wiley-Blackwell
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