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https://www.readbyqxmd.com/read/28922483/molecular-basis-of-oral-squamous-cell-carcinoma-in-young-patients-is-it-any-different-from-older-patients
#1
REVIEW
Sara Ferreira Dos Santos Costa, Peter A Brennan, Ricardo Santiago Gomez, Eduardo Rodrigues Fregnani, Alan Roger Santos-Silva, Manoela Domingues Martins, Gilberto de Castro-Junior, Siavash Rahimi, Felipe Paiva Fonseca
Oral squamous cell carcinoma (OSCC) is the commonest subtype of oral cancer, mainly affecting older patients. It used to be a rare disease among individuals younger than 40 years, but recently increased incidences in this age group are being reported worldwide. The pathogenesis of OSCC affecting young patients remains controversial and the well known etiological factors for oral cancer, tobacco and alcohol use, are believed to play a minor role in the carcinogenesis of the neoplasm, suggesting that the etiology and the molecular basis of OSCC may differ between younger and older patients...
September 18, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28921398/preliminary-analysis-of-numerical-chromosome-abnormalities-in-reciprocal-and-robertsonian-translocation-preimplantation-genetic-diagnosis-cases-with-24-chromosomal-analysis-with-an-acgh-snp-microarray
#2
Yanxin Xie, Yanwen Xu, Jing Wang, Benyu Miao, Yanhong Zeng, Chenhui Ding, Jun Gao, Canquan Zhou
PURPOSE: The aim of this study was to determine whether an interchromosomal effect (ICE) occurred in embryos obtained from reciprocal translocation (rcp) and Robertsonian translocation (RT) carriers who were following a preimplantation genetic diagnosis (PGD) with whole chromosome screening with an aCGH and SNP microarray. We also analyzed the chromosomal numerical abnormalities in embryos with aneuploidy in parental chromosomes that were not involved with a translocation and balanced in involved parental translocation chromosomes...
September 18, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28921168/chromosomal-abnormalities-affect-the-surgical-outcome-in-infants-with-hypoplastic-left-heart-syndrome-a-large-cohort-analysis
#3
Dala Zakaria, Xinyu Tang, Rupal Bhakta, Nahed O ElHassan, Parthak Prodhan
Patients with hypoplastic left heart syndrome (HLHS) can have associated genetic abnormalities. This study evaluated the incidence of genetic abnormalities among infants with HLHS and the short-term outcomes of this population during the first hospitalization. This is a retrospective analysis of the multi-center Pediatric Heath Information System database of infants with HLHS who underwent Stage I Norwood, Hybrid, or heart transplant during their first hospitalization from 2004 through 2013. We compared clinical data between infants with and without genetic abnormality, among the three most common chromosomal abnormalities, and between survivors and non-survivors...
September 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28919146/m%C3%A3-llerian-agenesis-in-cat-eye-syndrome-and-22q11-chromosome-abnormalities-a-case-report-and-literature-review
#4
Abdulmajeed AlSubaihin, John VanderMeulen, Kate Harris, John Duck, Elizabeth McCready
BACKGROUND: Although Müllerian agenesis is the second most common cause of primary amenorrhea the underlying etiology in the majority of cases is unknown. Müllerian agenesis has been reported as a rare finding associated with chromosomal aberrations of the 22q11 chromosomal region including at least one individual with cat eye syndrome (CES) and 10 individuals with deletions or duplications of the 22q11.2 region. However, a potential link between 22q11 abnormalities and uterine malformations has been difficult to adequately ascertain given the limited case reports in the literature...
September 14, 2017: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/28918392/cnvs-affecting-cancer-predisposing-genes-cpgs-detected-as-incidental-findings-in-routine-germline-diagnostic-chromosomal-microarray-cma-testing
#5
Josie Innes, Lisa Reali, Jill Clayton-Smith, Georgina Hall, Derek Hk Lim, George J Burghel, Kim French, Unzela Khan, Daniel Walker, Fiona Lalloo, D Gareth R Evans, Dominic McMullan, Eamonn R Maher, Emma R Woodward
BACKGROUND: Identification of CNVs through chromosomal microarray (CMA) testing is the first-line investigation in individuals with learning difficulties/congenital abnormalities. Although recognised that CMA testing may identify CNVs encompassing a cancer predisposition gene (CPG), limited information is available on the frequency and nature of such results. METHODS: We investigated CNV gains and losses affecting 39 CPGs in 3366 pilot index case individuals undergoing CMA testing, and then studied an extended cohort (n=10 454) for CNV losses at 105 CPGs and CNV gains at 9 proto-oncogenes implicated in inherited cancer susceptibility...
September 16, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28917518/genome-stability-of-programmed-stem-cell-products
#6
REVIEW
Ulrich Martin
Inherited and acquired genomic abnormalities are known to cause genetic diseases and contribute to cancer formation. Recent studies demonstrated a substantial mutational load in mouse and human embryonic and induced pluripotent stem cells (ESCs and iPSCs). Single nucleotide variants, copy number variations, and larger chromosomal abnormalities may influence the differentiation capacity of pluripotent stem cells and the functionality of their derivatives in disease modelling and drug screening, and are considered a serious risk for cellular therapies based on ESC or iPSC derivatives...
September 13, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28916873/effects-of-methotrexate-on-the-quality-of-oocyte-maturation-in-vitro
#7
N Tian, J Yu, Sh Zhang, W Y Ma, T Wang, Y M Wang
Methotrexate (MTX), an antifolate drug, is widely used for clinical treatment of malignancies and ectopic pregnancy. Many studies have documented that MTX has strong side-effects on rapidly dividing somatic cells. However, its side-effects on female reproductive cells have not been widely reported. Combined with in vitro culture, two-photon fluorescence imaging and three-dimensional reconstruction, this study analyzed the effects of MTX on oocyte maturation time, chromosome arrangement, karyotype, spindle morphology, and the localization of microtubule organizing centers (MTOCs)...
September 15, 2017: European Biophysics Journal: EBJ
https://www.readbyqxmd.com/read/28915648/synergistic-suppression-of-t-8-21-positive-leukemia-cell-growth-by-combining-oridonin-and-mapk1-erk2-inhibitors
#8
Pavel Spirin, Timofey Lebedev, Natalia Orlova, Alexey Morozov, Nadezhda Poymenova, Sergey E Dmitriev, Anton Buzdin, Carol Stocking, Olga Kovalchuk, Vladimir Prassolov
One of the most common chromosomal translocations in acute myeloid leukemia is t(8;21)(q22;q22), which results in the appearance of abnormal transcripts encoding for the fusion protein RUNX1-ETO. Therefore, this oncoprotein is considered to be a pertinent and promising target for treating t(8;21) leukemia. Previously, we have shown that downregulation of RUNX1-ETO leads to activation of intracellular signaling pathways enhancing cell survival and determined that the protein ERK2 can mediate activation of most of these pathways...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915607/coal-tar-pitch-extract-could-induce-chromosomal-instability-of-human-bronchial-epithelial-cells-mediated-by-spindle-checkpoint-related-proteins
#9
Peng Zhang, Zhitao Li, Na Wang, Guangcai Duan, Wei Wang, Yanming Feng, Yong Zhao, Lixia Wang, Hansong Zhu, Qiao Zhang, Xiaozhuan Liu, Weidong Wu, Yongjun Wu, Wu Yao, Jing Wang, Yiming Wu, Feifei Feng
Coal tar pitch (CTP) is a byproduct of coal tar distillation. The workers working with coal tar or in aluminum smelters, potrooms and carbon plants have the opportunities of exposing to coal tar pitch volatiles. Coal tar pitches from which polycyclic aromatic hydrocarbons (PAHs) originate have been shown to exhibit lung carcinogenicity in humans. Chromosomal instability (CIN) is a mechanism in carcinogenesis, however, whether CIN is involved in coal tar pitch-induced lung cancer remains elusive. In this present study, human bronchial epithelial cells (BEAS-2B) were first exposed to coal tar pitch extracts (CTPE) to induce a malignant transformation model...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915119/cytogenetic-analysis-in-fetuses-with-late-onset-abnormal-sonographic-findings
#10
Ron Bardin, Eran Hadar, Lylach Haizler-Cohen, Rinat Gabbay-Benziv, Israel Meizner, Sarit Kahana, Josepha Yeshaya, Shiri Yacobson, Lital Cohen-Vig, Ifaat Agmon-Fishman, Lina Basel-Vanagaite, Idit Maya
OBJECTIVE: To determine the rate of chromosomal cytogenetic abnormalities in fetuses with late onset abnormal sonographic findings. DESIGN: Retrospective cohort of women who underwent amniocentesis at or beyond 23 weeks of gestation, for fetal karyotype and chromosomal microarray analysis, indicated due to late onset abnormal sonographic findings. RESULTS: All 103 fetuses had a normal karyotype. Ninety-five women also had chromosomal microarray analysis (CMA) performed...
September 15, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28913734/molecular-profile-of-atypical-hyperplasia-of-the-breast
#11
REVIEW
David N Danforth
PURPOSE: Atypical ductal and atypical lobular hyperplasia (AH) of the breast are important proliferative lesions which are associated with a significantly increased risk for breast cancer. The breast cancer which develops in association with AH may occur synchronously, representing local progression, or metachronously at a later date in either the ipsilateral or contralateral breast. These high-risk characteristics of AH suggest they contain significant genomic changes. METHODS: To define the genomic changes in AH, a comprehensive review of the literature was conducted to identify the numerical chromosomal and structural chromosomal changes, DNA methylation, and gene expression abnormalities in atypical ductal and atypical lobular hyperplasia...
September 14, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28913147/summary-of-2185-prenatal-invasive-procedures-in-a-single-center-a-retrospective-analysis
#12
Hüseyin Çağlayan Özcan, Mete Gürol Uğur, Seyhun Sucu, Aynur Mustafa, Neslihan Bayramoğlu Tepe, Özcan Balat
OBJECTIVE: To determine the frequency, indications, and outcomes of diagnostic invasive prenatal procedures (DIPP) performed in a university hospital. MATERIALS AND METHODS: This retrospective, observational study included 2185 cases of DIPP (chorionic villus sampling, amniocentesis, and cordocentesis) performed at the department of obstetrics and gynecology of a university hospital between 2010 and 2016. We included all DIPP cases performed between 11 and 24 weeks of gestation...
June 2017: Turk J Obstet Gynecol
https://www.readbyqxmd.com/read/28912835/a-unique-set-of-complex-chromosomal-abnormalities-in-an-infant-with-myeloid-leukemia-associated-with-down-syndrome
#13
Daiane Correa de Souza, Amanda Faria de Figueiredo, Daniela R Ney Garcia, Elaine Sobral da Costa, Moneeb A K Othman, Thomas Liehr, Eliana Abdelhay, Maria Luiza Macedo Silva, Teresa de Souza Fernandez
BACKGROUND: Children with Down syndrome (DS) have an enhanced risk of developing acute leukemia, with the most common subtype being acute megakaryoblastic leukemia (AMKL). Myeloid leukemia in Down syndrome (ML-DS) is considered a disease with distinct clinical and biological features. There are few studies focusing on the clonal cytogenetic changes during evolution of ML-DS. CASE PRESENTATION: Here, we describe a complex karyotype involving a previously unreported set of chromosomal abnormalities acquired during progression of ML-DS in an infant boy: derivative der(1)t(1;15)(q24;q23), translocation t(4;5)(q26;q33) and derivative der(15)t(7;15)(p21;q23)...
2017: Molecular Cytogenetics
https://www.readbyqxmd.com/read/28912834/molecular-and-clinical-characterization-of-new-patient-with-1-08%C3%A2-mb-deletion-in-10p15-3-region
#14
Anna Poluha, Joanna Bernaciak, Ilona Jaszczuk, Marta Kędzior, Beata Anna Nowakowska
BACKGROUND: Three distinct contiguous gene deletion syndromes are located at 10p chromosomal region. The deletion, involving 10p15.3 region, has been characterized by (DeScipio et al., Am J Med Genet A 158A:2152-61, 2012). However, because of the variation in size of the described deletions and lack of knowledge about the involved genes, the correlation between genotypes and patients' phenotypes remains unknown. CASE PRESENTATION: We describe female patient with de novo 1,08 Mb deletion in 10p15...
2017: Molecular Cytogenetics
https://www.readbyqxmd.com/read/28906004/acute-myeloid-leukaemia-fab-aml-m4eo-with-cryptic-insertion-of-cbfb-resulting-in-cbfb-myh11-fusion
#15
Nathalie Douet-Guilbert, Aurelie Chauveau, Nadia Gueganic, Gaëlle Guillerm, Corine Tous, Marie-Josee Le Bris, Audrey Basinko, Frederic Morel, Valerie Ugo, Marc De Braekeleer
Inv(16)(p13q22) and t(16;16)(p13;q22) are cytogenetic hallmarks of acute myelomonoblastic leukaemia, most of them associated with abnormal bone marrow eosinophils [acute myeloid leukaemia French-American-British classification M4 with eosinophilia (FAB AML-M4Eo)] and a relatively favourable clinical course. They generate a 5'CBFB-3'MYH11 fusion gene. However, in a few cases, although RT-PCR identified a CBFB-MYH11 transcript, normal karyotype and/or fluorescent in situ hybridization (FISH) analyses using commercially available probes are found...
September 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28905881/identification-of-asah1-as-a-susceptibility-gene-for-familial-keloids
#16
Regie Lyn P Santos-Cortez, Ying Hu, Fanyue Sun, Fairouz Benahmed-Miniuk, Jian Tao, Jitendra K Kanaujiya, Samuel Ademola, Solomon Fadiora, Victoria Odesina, Deborah A Nickerson, Michael J Bamshad, Peter B Olaitan, Odunayo M Oluwatosin, Suzanne M Leal, Ernst J Reichenberger
Keloids result from abnormal proliferative scar formation with scar tissue expanding beyond the margin of the original wound and are mostly found in individuals of sub-Saharan African descent. The etiology of keloids has not been resolved but previous studies suggest that keloids are a genetically heterogeneous disorder. Although possible candidate genes have been suggested by genome-wide association studies using common variants, by upregulation in keloids or their involvement in syndromes that include keloid formation, rare coding variants that contribute to susceptibility in non-syndromic keloid formation have not been previously identified...
October 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28905509/de-novo-setd5-loss-of-function-variant-as-a-cause-for-intellectual-disability-in-a-10-year-old-boy-with-an-aberrant-blind-ending-bronchus
#17
Claire Green, Joshua Willoughby, Meena Balasubramanian
Although rare, 3p microdeletion cases have been well described in the clinical literature. The clinical phenotype includes; intellectual disability (ID), growth retardation, facial dysmorphism, and cardiac malformations. Advances in chromosome microarray (CMA) testing narrowed the 3p25 critical region to a 124 kb region, and recent Whole Exome Sequencing (WES) studies have suggested that the SETD5 gene contributes significantly to the 3p25 phenotype. Loss-of-Function (LoF) variants in SETD5 are now considered a likely cause of ID...
September 14, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28905115/clinical-application-of-snp-array-analysis-in-fetuses-with-ventricular-septal-defects-and-normal-karyotypes
#18
Fang Fu, Qiong Deng, Ting-Ying Lei, Ru Li, Xiang-Yi Jing, Xin Yang, Can Liao
PURPOSE: The present study aims to evaluate the utility of high-resolution single-nucleotide polymorphism (SNP) arrays in fetuses with ventricular septal defects (VSDs) with or without other structural anomalies but with normal karyotypes and to investigate the outcomes of cases of prenatal VSDs via clinical follow-up. METHODS: We analyzed 144 fetuses with VSDs and normal karyotypes using Affymetrix CytoScan HD arrays and the analyses were carried out a year after birth...
September 13, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28903905/the-pathogenicity-of-genomic-genetic-variant-of-x-chromosomal-genes-in-males-with-intellectual-disability
#19
Ji-Ping Peng, Fang Liu, Hua Xie, Xiao-Li Chen
Intellectual Disability (ID, previously named mental retardation) is a group of common pediatric neurology disorders characterized by extensive genetic and phenotypic heterogeneity. About 25%-50% of ID was caused by genomic/genetic variants, in which genomic/genetic variants of X-chromosome are one of key pathogenic causation (25%-30%), resulting in X-linked ID (XLID). The epidemiological data showed that the male to female ratio is 1.3: 1 in ID patients. The prevalence of XLID in the whole ID population is 10%-15%, and this prevalence reaches 20%-25% in the male ID population...
June 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28903372/myosin-va-plays-essential-roles-in-maintaining-normal-mitosis-enhancing-tumor-cell-motility-and-viability
#20
Yan-Ruide Li, Ai Zhong, Han Dong, Lu-Han Ni, Fu-Qing Tan, Wan-Xi Yang
Myosin Va, a member of Class V myosin, functions in organelle motility, spindle formation, nuclear morphogenesis and cell motility. The purpose of this study is to explore the expression and localization of myosin Va in testicular cancer and prostate cancer, and its specific roles in tumor progression including cell division, migration and proliferation. We detected myosin Va in testicular and prostate tumor tissues using sqRT-PCR, western blot, and immunofluorescence. Tumor samples showed an increased expression of myosin Va, abnormal actin and myosin Va distribution...
August 15, 2017: Oncotarget
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