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Pten review

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https://www.readbyqxmd.com/read/28413152/loss-of-pten-expression-is-associated-with-high-microrna-24-level-and-poor-prognosis-in-patients-with-tongue-squamous-cell-carcinoma
#1
Jingzhu Zhao, Jiadong Chi, Ming Gao, Jingtai Zhi, Yigong Li, Xiangqian Zheng
PURPOSE: The aim of this study was to detect the relationship between phosphatase and tensin homolog deletion on chromosome 10 (PTEN) and microRNA 24 (miR-24) and correlate PTEN expression with important clinical parameters of patients with tongue squamous cell carcinoma (TSCC). MATERIALS AND METHODS: In this retrospective case series, all TSCC patients treated at Tianjin Medical University Cancer Institute and Hospital between March 2005 and October 2011 were retrospectively reviewed...
March 23, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28399347/conjunctival-tumors-review-of-clinical-features-risks-biomarkers-and-outcomes-the-2017-j-donald-m-gass-lecture
#2
Carol L Shields, Jason L Chien, Thamolwan Surakiatchanukul, Kareem Sioufi, Sara E Lally, Jerry A Shields
Conjunctival tumors encompass a broad range of diagnoses. The 3 most important malignant tumors include ocular surface squamous neoplasia (OSSN) (14%), melanoma (12%), and lymphoma (7%). Conjunctival malignancies are rarely found in children. Regarding OSSN, pre-disposing conditions include chronic solar radiation, immune deficiency (HIV), organ transplant, autoimmune conditions, xeroderma pigmentosum, and chronic exposure to cigarette smoke. OSSN is managed surgically or with topical/injection immunotherapy or chemotherapy...
March 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28396890/cowden-syndrome-%C3%A2-oral-presentations-of-a-paraneoplastic-syndrome-%C3%A2-case-report-and-review-of-the-literature
#3
Snober Tariq, Joseph Katz
Cowden syndrome is an autosomal dominant disorder with a predisposition to multiple benign and malignant tumors with unique oral manifestations. We present a case of Cowden syndrome in a patient diagnosed with breast cancer, traumatic fibromas, bronchial asthma, and multiple papillomatous fibromatosis of the oral cavity. Close association between oral papillomatosis associated with Cowden syndrome and PTEN gene mutation may increase the risk for malignant transformation. Therefore, patients of Cowden syndrome should be monitored carefully for all kinds of cancers...
2017: Quintessence International
https://www.readbyqxmd.com/read/28377483/vulvar-squamous-cell-carcinoma-vscc-as-two-diseases-hpv-status-identifies-distinct-mutational-profiles-including-oncogenic-fibroblast-growth-factor-receptor-3
#4
Johanne I Weberpals, Bryan Lo, Marc M Duciaume, Johanna N Spaans, Aisling A Clancy, Jim Dimitroulakos, Glenwood D Goss, Harman S Sekhon
PURPOSE: Patients with advanced or recurrent invasive vulvar squamous cell carcinoma (VSCC) have limited treatment options and a grave prognosis. Understanding the genomic landscape may facilitate the identification of new therapies and improve clinical outcomes. EXPERIMENTAL DESIGN: A retrospective chart review and molecular analysis of patients with VSCC from 2000-2016 was performed at the Ottawa Hospital Research Institute. The presence of oncogenic HPV was determined by nested PCR and amplified DNA was sequenced using the Ion AmpliSeq Cancer Hotspot v2 Panel...
April 4, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28289089/molecular-pathways-oncologic-pathways-and-their-role-in-t-cell-exclusion-and-immune-evasion-a-new-role-for-the-axl-receptor-tyrosine-kinase
#5
Todd A Aguilera, Amato J Giaccia
With the clinical impact of CTLA-4 and PD-1/PD-L1 immune checkpoint therapies, widespread interest in cancer immunotherapy has been ignited. However, the rate and extent of clinical responses to approved therapies are limited and often non-existent in many solid tumors. This is partially because immune checkpoint therapies are most effective against T-cell inflamed tumors, and non-T-cell inflamed or T-cell excluded tumors remain a significant barrier. New strategies are needed to overcome immune resistance mechanisms that arise during tumor development which result in T-cell exclusion...
March 13, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28283772/identification-genetic-testing-and-management-of-hereditary-melanoma
#6
Sancy A Leachman, Olivia M Lucero, Jone E Sampson, Pamela Cassidy, William Bruno, Paola Queirolo, Paola Ghiorzo
Several distinct melanoma syndromes have been defined, and genetic tests are available for the associated causative genes. Guidelines for melanoma genetic testing have been published as an informal "rule of twos and threes," but these guidelines apply to CDKN2A testing and are not intended for the more recently described non-CDKN2A melanoma syndromes. In order to develop an approach for the full spectrum of hereditary melanoma patients, we have separated melanoma syndromes into two types: "melanoma dominant" and "melanoma subordinate...
March 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/28277880/genomic-tests-to-guide-prostate-cancer-management-following-diagnosis
#7
Michele Colicchia, Alessandro Morlacco, John C Cheville, R Jeffrey Karnes
Prostate cancer (PCa) is a common cancer in men, but variable clinical behaviors make its management challenging. Risk stratification is a key issue in disease management. Patient-tailored strategies are strongly advocated to reduce unnecessary treatment while maximizing the oncological outcomes of patient who need active treatment in the primary, adjuvant or salvage setting. Recently, tissue-based biomarkers or genomic tests have become available to improve the clinical decision-making. Areas covered: In this review, the authors present recent evidence about these tissue-based biomarkers, discussing the application of each of them in the clinical setting, focusing on the tests aimed to provide a better risk stratification and to guide decision-making after the diagnosis of PCa (i...
March 13, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28273718/mechanisms-of-parkinson-s-disease-related-proteins-in-mediating-secondary-brain-damage-after-cerebral-ischemia
#8
TaeHee Kim, Raghu Vemuganti
Both Parkinson's disease (PD) and stroke are debilitating conditions that result in neuronal death and loss of neurological functions. These two conditions predominantly affect aging populations with the deterioration of the quality of life for the patients themselves and a tremendous burden to families. While the neurodegeneration and symptomology of PD develop chronically over the years, post-stroke neuronal death and dysfunction develop rapidly in days. Despite the discrepancy in the pathophysiological time frame and severity, both conditions share common molecular mechanisms that include oxidative stress, mitochondrial dysfunction, inflammation, endoplasmic reticulum stress, and activation of various cell death pathways (apoptosis/necrosis/autophagy) that synergistically modulate the neuronal death...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28271698/ovarian-cancer-in-endometriosis-an-update-on-the-clinical-and-molecular-aspects
#9
Rachel Ruderman, Mary Ellen Pavone
While endometriosis is a benign condition, the presence of endometriosis has been associated with the development of several types of cancers, including ovarian. Endometriomas, or ovarian endometriotic cysts, are found in 17-44% of patients with endometriosis, and may be a common precursor lesions to ovarian cancer. Endometriosis associated ovarian cancer is especially prominent in endometrioid and clear cell ovarian tumor histological subtypes. Several common pathways linking endometriosis and ovarian cancer have been elucidated, including the dominance of certain cytokines, oxidative stress, and a hyper-estrogenic hormonal milieu, which propagate both endometriosis and endometriosis associated ovarian cancer...
June 2017: Minerva Ginecologica
https://www.readbyqxmd.com/read/28263037/loss-of-phosphatase-and-tensin-homolog-expression-correlates-with-clinicopathological-features-of-non-small-cell-lung-cancer-patients-and-its-impact-on-survival-a-systematic-review-and-meta-analysis
#10
Yongsheng Zhao, Renyan Zheng, Jian Li, Feng Lin, Lunxu Liu
BACKGROUND: Phosphatase and tensin homolog ( PTEN ), regarded as a tumor suppressor gene, may act as a prognostic biomarker in human cancers. METHODS: All eligible studies from MEDLINE, Embase, CENTRAL, and the Chinese BioMedical Literature Database to October 2016 were incorporated. Two reviewers independently screened the literature according to inclusion and exclusion criteria, extracted the data, assessed the methodological quality of the included studies, and conducted meta-analysis...
March 6, 2017: Thoracic Cancer
https://www.readbyqxmd.com/read/28262306/immunohistochemical-analysis-of-pten-her2-neu-and-ki67-expression-in-patients-with-gastric-cancer-and-their-association-with-survival
#11
Dalia M Badary, Mostafa E Abdel-Wanis, Mohamed Z Hafez, Noha A Aboulhagag
BACKGROUND: Considering the poor prognosis of patients with gastric cancer, molecular diagnostic and prognostic markers for this cancer should be established. The aims of our study were to assess the correlations between PTEN, HER2/neu, and Ki67 expressions and clinicopathological factors of gastric cancer patients in upper Egypt, as well as their influence on OS and DFS. PATIENTS AND METHODS: In this descriptive-analytic study, 42 patients with gastric carcinoma treated by postioerative chemoradiation between 2004 and 2014...
February 24, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/28259754/mc1r-signaling-intracellular-partners-and-pathophysiological-implications
#12
REVIEW
Cecilia Herraiz, Jose C Garcia-Borron, Celia Jiménez-Cervantes, Conchi Olivares
The melanocortin-1 receptor (MC1R) preferentially expressed in melanocytes is best known as a key regulator of the synthesis of epidermal melanin pigments. Its paracrine stimulation by keratinocyte-derived melanocortins also activates DNA repair pathways and antioxidant defenses to build a complex, multifaceted photoprotective response. Many MC1R actions rely on cAMP-dependent activation of two transcription factors, MITF and PGC1α, but pleiotropic MC1R signaling also involves activation of mitogen-activated kinases and AKT...
March 1, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28222667/curcumin-inhibits-cancer-progression-through-regulating-expression-of-micrornas
#13
REVIEW
Siying Zhou, Sijie Zhang, Hongyu Shen, Wei Chen, Hanzi Xu, Xiu Chen, Dawei Sun, Shanliang Zhong, Jianhua Zhao, Jinhai Tang
Curcumin, a major yellow pigment and spice in turmeric and curry, is a powerful anti-cancer agent. The anti-tumor activities of curcumin include inhibition of tumor proliferation, angiogenesis, invasion and metastasis, induction of tumor apoptosis, increase of chemotherapy sensitivity, and regulation of cell cycle and cancer stem cell, indicating that curcumin maybe a strong therapeutic potential through modulating various cancer progression. It has been reported that microRNAs as small noncoding RNA molecules are related to cancer progression, which can be regulated by curcumin...
February 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28199193/epigenetic-and-risk-factors-of-testicular-germ-cell-tumors-a-brief-review
#14
Daniel Adrian Landero-Huerta, Rosa Maria Vigueras-Villasenor, Emiy Yokoyama-Rebollar, Elena Arechaga-Ocampo, Julio Cesar Rojas-Castaneda, Francisco Jimenez-Trejo, Margarita Chavez-Saldana
Testicular germ cell cancer (TGCT) is the most common malignancy among young adult males, which has become important due to its increased incidence and mortality in the population worldwide. The etiology is multifactorial. Recent studies have shown some associations between the development of isolated TGCT and certain risk factors, such as exposure to endocrine disruptors, cryptorchidism, and family history of cancer, in order to identify the key pieces in carcinogenesis. Some of the most important findings in recent years is the association of different genes, such as c-KIT/KITLG, expression of the miR-371-373 cluster and protein expression as c-KIT and POU5F1 in the development of this neoplasia, and the identification of new molecular markers as TGFBR3 gene, identifying aberrant methylation patterns in promoter regions of several genes, expression of miR-1297 which regulates PTEN and protein expression as DMTR1...
March 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28145643/analysis-of-fifty-hotspot-mutations-of-lung-squamous-cell-carcinoma-in-never-smokers
#15
Ha Youn Lee, Se Hoon Lee, Jae Kyung Won, Dong Soo Lee, Nak Jung Kwon, Sun Mi Choi, Jinwoo Lee, Chang Hoon Lee, Sang Min Lee, Jae Joon Yim, Chul Gyu Yoo, Young Whan Kim, Sung Koo Han, Young Sik Park
Smoking is the major risk factor for lung squamous cell carcinoma (SCC), although a small number of lung SCCs occurs in never-smokers. The purpose of this study was to compare 50 hotspot mutations of lung SCCs between never-smokers and smokers. We retrospectively reviewed the medical records of patients newly diagnosed with lung SCC between January 1, 2011 and December 31, 2013 in the Seoul National University Hospital. Formalin-fixed, paraffin-embedded tumor samples were used for analysis of hotspot mutations...
March 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28143872/musashi-rna-binding-proteins-as-cancer-drivers-and-novel-therapeutic-targets
#16
Alexander E Kudinov, John Karanicolas, Erica A Golemis, Yanis Boumber
Aberrant gene expression that drives human cancer can arise from epigenetic dysregulation. While much attention has focused on altered activity of transcription factors and chromatin-modulating proteins, proteins that act post-transcriptionally can potently affect expression of oncogenic signaling proteins. The RNA-binding proteins (RBPs) Musashi-1 (MSI1) and Musashi-2 (MSI2) are emerging as regulators of multiple critical biological processes relevant to cancer initiation, progression, and drug resistance...
January 31, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28134728/marker-protein-expression-combined-with-expression-heterogeneity-is-a-powerful-indicator-of-malignancy-in-acral-lentiginous-melanomas
#17
Fernando Cintra Lopes Carapeto, Andréia Neves Comodo, Andressa Germano, Daiane Pereira Guimarães, Denise Barcelos, Mariana Fernandes, Gilles Landman
PATIENTS AND METHODS: Samples of acral lentiginous melanomas (ALMs) were obtained from the Department of Pathology at Escola Paulista de Medicina-Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil. Demographic, clinical, and follow-up data were obtained from the charts of Hospital São Paulo. From 2 tissue microarrays containing 60 nevi and quadruplicate samples of ≥1.0-mm of 49 ALM, sections were stained to evaluate SCF, KIT, BRAF, CYCLIND1, MYC, and PTEN immunohistochemical protein expression...
February 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28131082/mitochondrial-dynamics-in-type-2-diabetes-pathophysiological-implications
#18
REVIEW
Susana Rovira-Llopis, Celia Bañuls, Noelia Diaz-Morales, Antonio Hernandez-Mijares, Milagros Rocha, Victor M Victor
Mitochondria play a key role in maintaining cellular metabolic homeostasis. These organelles have a high plasticity and are involved in dynamic processes such as mitochondrial fusion and fission, mitophagy and mitochondrial biogenesis. Type 2 diabetes is characterised by mitochondrial dysfunction, high production of reactive oxygen species (ROS) and low levels of ATP. Mitochondrial fusion is modulated by different proteins, including mitofusin-1 (MFN1), mitofusin-2 (MFN2) and optic atrophy (OPA-1), while fission is controlled by mitochondrial fission 1 (FIS1), dynamin-related protein 1 (DRP1) and mitochondrial fission factor (MFF)...
April 2017: Redox Biology
https://www.readbyqxmd.com/read/28125452/morphologic-reproducibility-genotyping-and-immunohistochemical-profiling-do-not-support-a-category-of-seromucinous-carcinoma-of-the-ovary
#19
Peter F Rambau, John B McIntyre, Jennifer Taylor, Sandra Lee, Travis Ogilvie, Anna Sienko, Don Morris, Máire A Duggan, W Glenn McCluggage, Martin Köbel
The 2014 World Health Organization Classification of Tumors of Female Reproductive Organs endorsed the new category of seromucinous carcinoma, a neoplasm that exhibits morphologic and immunophenotypic overlap with other histotypes of ovarian carcinoma. The goal of this study was to determine whether seromucinous carcinoma was a distinct histotype by assessing its diagnostic reproducibility and comparing its molecular composition to the 5 major histotypes of ovarian carcinoma. Thirty-two tumors diagnosed as seromucinous carcinomas from 2 centers were studied...
May 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28105255/pi3k-ship2-pten-pathway-in-cell-polarity-and-hepatitis-c-virus-pathogenesis
#20
REVIEW
Aline Awad, Ama Gassama-Diagne
Hepatitis C virus (HCV) infects hepatocytes, polarized cells in the liver. Chronic HCV infection often leads to steatosis, fibrosis, cirrhosis and hepatocellular carcinoma, and it has been identified as the leading cause of liver transplantation worldwide. The HCV replication cycle is dependent on lipid metabolism and particularly an accumulation of lipid droplets in host cells. Phosphoinositides (PIs) are minor phospholipids enriched in different membranes and their levels are tightly regulated by specific PI kinases and phosphatases...
January 8, 2017: World Journal of Hepatology
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