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Carcinogenesis

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https://www.readbyqxmd.com/read/28430874/developmental-sall2-transcription-factor-a-new-player-in-cancer
#1
Viviana E Hermosilla, Matias I Hepp, David Escobar, Carlos Farlas, Elizabeth N Riffo, Ariel F Castro, Roxana Pincheira
SALL2, also known as Spalt-like transcription factor 2, is a member of the SALL family of transcription factors involved in development and conserved through evolution. Since its identification in 1996, findings indicate that SALL2 plays a role in neurogenesis, neuronal differentiation and eye development. Consistently, SALL2 deficiency associates with neural tube defects and coloboma, a congenital eye disease. Relevant to cancer, clinical studies indicate that SALL2 is deregulated in various cancers, and is a specific biomarker for Synovial Sarcoma...
April 18, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28430867/emerging-evidence-for-the-role-of-differential-tumor-microenvironment-in-breast-cancer-racial-disparity-a-closer-look-at-the-surroundings
#2
Sachin Kumar Deshmukh, Sanjeev K Srivastava, Nikhil Tyagi, Aamir Ahmad, Ajay P Singh, Ahmed Al Ghadhban, Donna L Dyess, James E Carter, Kari Dugger, Seema Singh
Although increased awareness leading to early detection and prevention, as well as advancements in treatment strategies, have resulted in superior clinical outcomes, African American women with breast cancer continue to have greater mortality rates, compared to Caucasian American counterparts. Moreover, African American women are more likely to have breast cancer at a younger age and be diagnosed with aggressive tumor sub-types. Such racial disparities can be attributed to socioeconomic differences, but it is increasingly being recognized that these disparities may indeed be due to certain genetic and other non-genetic biological differences...
April 18, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28419251/evaluating-genetic-variants-associated-with-breast-cancer-risk-in-high-and-moderate-penetrance-genes-in-asians
#3
Mi-Ryung Han, Wei Zheng, Qiuyin Cai, Yu-Tang Gao, Ying Zheng, Manjeet K Bolla, Kyriaki Michailidou, Joe Dennis, Qin Wang, Alison M Dunning, Paul Brennan, Shou-Tung Chen, Ji-Yeob Choi, Mikael Hartman, Hidemi Ito, Artitaya Lophatananon, Keitaro Matsuo, Hui Miao, Kenneth Muir, Suleeporn Sangrajrang, Chen-Yang Shen, Soo Hwang Teo, Chiu-Chen Tseng, Anna H Wu, Cheng Har Yip, Daehee Kang, Yong-Bing Xiang, Douglas F Easton, Xiao-Ou Shu, Jirong Long
Over the past 20 years, high-penetrance pathogenic mutations in genes BRCA1, BRCA2, TP53, PTEN, STK11, and CDH1 and moderate-penetrance mutations in genes CHEK2, ATM, BRIP1, PALB2, RAD51C, RAD50, and NBN have been identified for breast cancer. In the present study, we investigated whether there are additional variants in these 13 genes associated with breast cancer among women of Asian ancestry. We analyzed up to 654 single nucleotide polymorphisms (SNPs) from 6269 cases and 6624 controls of Asian descent included in the Breast Cancer Association Consortium (BCAC), and up to 236 SNPs from 5794 cases and 5529 controls included in the Shanghai Breast Cancer Genetics Study (SBCGS)...
April 17, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28419250/enhanced-glycolysis-regulated-by-hif-1%C3%AE-via-mct-4-promotes-inflammation-in-arsenite-induced-carcinogenesis
#4
Fei Luo, Zhonglan Zou, Xinlu Liu, Min Ling, Qingling Wang, Qi Wang, Lu Lu, Le Shi, Yonglian Liu, Qizhan Liu, Aihua Zhang
Arsenite is well established as a human carcinogen, but the molecular mechanisms leading to arsenite-induced carcinogenesis are complex and elusive. Accelerated glycolysis, a common process in tumor cells called the Warburg effect, is associated with various biological phenomena. However, the role of glycolysis induced by arsenite is unknown. We have found that, with chronic exposure to arsenite, L-02 cells undergo a metabolic shift to glycolysis. In liver cells exposed to arsenite, hypoxia inducible factor-1α (HIF-1α) and monocarboxylate transporter-4 (MCT-4) are over-expressed...
April 17, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28419191/ppar%C3%AE-promotes-tumor-progression-via-activation-of-glut1-and-slc1-a5-transcription
#5
Wenbo Zhang, Ying Xu, QingGang Xu, Haifeng Shi, Juanjuan Shi, Yongzhong Hou
Malignant cancer cell uncontrolled growth depends on the persistent nutrient availability such as glucose and amino acids, which is required for cancer cell energetic and biosynthetic pathways. As a nuclear hormone receptor, peroxisome-proliferator-activated receptor δ (PPARδ) plays a critical role in inflammation and cancer, however, it is still unclear the regulatory mechanism of PPARδ on cancer cell metabolism. Here we found that PPARδ directly regulated neutral amino acid transporter SLC1-A5 (solutecarrier family 1 member 5) and glucose transporter-1(Glut1) gene transcription, leading to uptake of glucose and amino acid, activation of mTOR signaling, and tumor progression...
April 13, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28383684/functional-variants-in-dcaf4-associated-with-lung-cancer-risk-in-european-populations
#6
Hongliang Liu, Zhensheng Liu, Yanru Wang, Thomas E Stinchcombe, Kouros Owzar, Younghun Han, Rayjean J Hung, Yonathan Brhane, John McLaughlin, Paul Brennan, Heike Bickeböller, Albert Rosenberger, Richard S Houlston, Neil Caporaso, Maria Teresa Landi, Irene Brüske, Angela Risch, Xifeng Wu, Yuanqing Ye, David C Christiani, Christopher I Amos, Qingyi Wei
Cullin-RING ubiquitin ligases (CRLs) responsible for substrate specificity of ubiquitination and play a key role in cell-cycle control and DNA damage response. In this study, we assessed associations between 16,599 SNPs in 115 CRL genes and lung cancer risk by using summary data of six published genome-wide association studies (GWASs) of 12,160 cases and 16,838 cases of European ancestry. As a result, we identified three independent SNPs in DCAF4 (rs117781739, rs12587742 and rs2240980) associated with lung cancer risk (odds ratio = 0...
April 5, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28383667/inactivation-of-jnk2-as-carcinogenic-factor-in-colitis-associated-and-sporadic-colorectal-carcinogenesis
#7
Wiebke Lessel, Andrew Silver, Doerthe Jechorek, Thomas Guenther, Friedrich Wilhelm Roehl, Thomas Kalinski, Albert Roessner, Angela Poehlmann-Nitsche
We recently reported that dysregulated c-Jun N-terminal kinases (JNK) activity causes defective cell cycle checkpoint control, inducing neoplastic transformation in a cellular ulcerative colitis (UC) model. In the quiescent chronic phase of UC, p-p54 JNK was down-regulated and p-p46 JNK was up-regulated. Both were up-regulated in the acute phase. Consequently, increased p21WAF1 and γ-H2AX, two JNK-regulated proteins, induced cell cycle arrest. Their down-regulation led to checkpoint override, causing increased proliferation and undetected DNA damage in quiescent chronic phase, all characteristics of tumorigenesis...
April 5, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28379297/human-mitochondrial-pyrroline-5-carboxylate-reductase-1-promotes-invasiveness-and-impacts-survival-in-breast-cancers
#8
Jiefeng Ding, Mei-Ling Kuo, Leila Su, Lijun Xue, Frank Luh, Hang Zhang, Jianghai Wang, Tiffany G Lin, Keqiang Zhang, Peiguo Chu, Shu Zheng, Xiyong Liu, Yun Yen
Human mitochondrial pyrroline-5-carboxylate reductase (PYCR) is a house-keeping enzyme that catalyzes the reduction of Δ1-pyrroline-5-carboxylate to proline. This enzymatic cycle plays pivotal roles in amino acid metabolism, intracellular redox potential and mitochondrial integrity. Here, we hypothesize that PYCR1 might be a novel prognostic biomarker and therapeutic target for breast cancer. In this study, breast cancer tissue samples were obtained from Zhejiang University (ZJU set). Immunohistochemistry analysis was performed to detect the protein level of PYCR1, and Kaplan-Meier and Cox proportional analyses were employed in this outcome study...
April 3, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28379317/circulating-pancreatic-stellate-stromal-cells-in-pancreatic-cancer-a-fertile-area-for-novel-research
#9
Tony Cy Pang, Zhihong Xu, Srinivasa Pothula, Therese Becker, David Goldstein, Romano C Pirola, Jeremy S Wilson, Minoti V Apte
Pancreatic stellate cells (PSCs) is known to play an important role in facilitating pancreatic cancer progression - both in terms of local tumour growth as well as the establishment of metastases. We have previously demonstrated that PSCs from the primary cancer seed to distant metastatic sites. We therefore hypothesise that PSCs circulate along with pancreatic cancer cells (circulating tumour cells - CTCs) to help create a growth permissive microenvironment at distant metastatic sites. This review aims to explore the concept of circulating PSCs in pancreatic cancer and suggests future directions for research in this area...
April 1, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28402394/autophagy-and-trkc-nt-3-signaling-joined-forces-boost-the-hypoxic-glioblastoma-cell-survival
#10
Soha Jawhari, Barbara Bessette, Sophie Hombourger, Karine Durand, Aurélie Lacroix, François Labrousse, Marie-Odile Jauberteau, Marie-Hélène Ratinaud, Mireille Verdier
Glioblastoma multiform (GBM), the most common and aggressive primary brain tumor, is characterized by a high degree of hypoxia and resistance to therapy because of its adaptation capacities, including autophagy and growth factors signaling. In this study, we show an efficient hypoxia-induced survival autophagy in four different GBM cell lines (U87MG, M059K, M059J and LN-18) and an activation of a particular neurotrophin signaling pathway. Indeed, the enhancement of both TrkC and NT-3 was followed by downstream p38MAPK phosphorylation, suggesting the occurrence of a survival autocrine loop...
March 31, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28379545/reduced-mrna-expression-of-nucleotide-excision-repair-genes-in-lymphocytes-and-risk-of-squamous-cell-carcinoma-of-the-head-and-neck
#11
Peng Han, Fengqin Gao, Hongliang Liu, Zhensheng Liu, Qiong Shi, Jesse D Troy, Kouros Owzar, Walter Lee, Jose P Zevallos, Erich M Sturgis, Qingyi Wei
Nucleotide excision repair (NER) plays a critical role in the development of smoking-related cancers. We hypothesize that mRNA expression levels of NER genes are associated with risk of the squamous cell carcinoma of head and neck (SCCHN). To test this hypothesis, we conducted a case-control study of 260 SCCHN patients and 246 cancer-free controls by measuring the mRNA expression levels of eight core NER genes in cultured peripheral lymphocytes. Compared with the controls, cases had statistically significantly lower expression levels of DDB1 and ERCC3 (P = 0...
March 31, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28369212/associations-between-single-nucleotide-polymorphisms-in-rybp-and-the-prognosis-of-hepatocellular-carcinoma-in-a-chinese-population
#12
Xiaonian Zhu, Zhigang Wang, Xiaoqiang Qiu, Chao Tan, Hongping Yu, Chunhua Bei, Linyuan Qin, Yuan Ren, Shengkui Tan
Down-regulated RINGl and YYl binding protein (RYBP) is reported to be an independent predictor of a poor prognosis in patients with hepatocellular carcinoma (HCC). However, the genetic association of RYBP polymorphisms with HCC risk and prognosis has not been investigated now. In this study, five RYBP SNPs, rs12956, rs2118593, rs17009699, rs4676875 and rs4532099, were studied from a hospital-based case-control study including 1,100 cases (HCC patients) and 1,100 controls (non-HCC patients) in Guangxi, China...
March 29, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28369244/targeted-sequencing-of-chromosome-15q25-identified-novel-variants-associated-with-risk-of-lung-cancer-and-smoking-behavior-in-chinese
#13
Yang Cheng, Cheng Wang, Meng Zhu, Juncheng Dai, Yuzhuo Wang, Liguo Geng, Zhihua Li, Jiahui Zhang, Hongxia Ma, Guangfu Jin, Dongxin Lin, Zhibin Hu, Hongbing Shen
Previous genome-wide association studies (GWAS) in populations of European descent identified a lung cancer susceptibility locus at 15q25 that was biologically associated with nicotine addiction. However, the allele frequency of susceptibility variants identified in this region varied dramatically across European and Asian populations, suggesting that additional risk SNPs in Asians need to be identified. Thus, we conducted a fine-mapping study of chromosome 15q25 using targeted resequencing of 200 lung cancer cases and 300 controls of Chinese descent...
March 27, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334277/in-bone-metastasis-mir-34a-5p-absence-inversely-correlates-with-met-expression-while-met-oncogene-is-unaffected-by-mir-34a-5p-in-non-metastatic-and-metastatic-breast-carcinomas
#14
Paola Maroni, Rossella Puglisi, Gianfranco Mattia, Alessandra Carè, Emanuela Matteucci, Paola Bendinelli, Maria Alfonsina Desiderio
The highlight of the molecular basis and therapeutic targets of the bone-metastatic process requires the identification of biomarkers of metastasis colonization. Here, we studied miR-34a-5p expression, and Met-receptor expression and localization in bone metastases from ductal breast carcinomas, and in ductal carcinomas without history of metastasis (20 cases). miR-34a-5p was elevated in non-metastatic breast carcinoma, intermediate in the adjacent tissue and practically absent in bone metastases, opposite to pair-matched carcinoma...
March 16, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28203756/erbb4-acts-as-a-suppressor-in-the-development-of-hepatocellular-carcinoma
#15
Yao Liu, Liming Song, Hengli Ni, Lina Sun, Weijuan Jiao, Lin Chen, Qun Zhou, Tong Shen, Hongxia Cui, Tianming Gao, Jianming Li
No abstract text is available yet for this article.
February 16, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334384/the-cancer-paradigms-of-mammalian-regeneration-can-mammals-regenerate-as-amphibians
#16
Rachel Sarig, Eldad Tzahor
Regeneration in mammals is restricted to distinct tissues and occurs mainly by expansion and maturation of resident stem cells. During regeneration, even subtle mutations in the proliferating cells may cause a detrimental effect by eliciting abnormal differentiation or malignant transformation. Indeed, cancer in mammals has been shown to arise through deregulation of stem cells maturation, which often leads to a differentiation block and cell transformation. In contrast, lower organisms such as amphibians retain a remarkable regenerative capacity in various organs, which occurs via de- and re-differentiation of mature cells...
April 1, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334334/p53-and-its-mutants-on-the-slippery-road-from-stemness-to-carcinogenesis
#17
Alina Molchadsky, Varda Rotter
Normal development, tissue homeostasis and regeneration following injury rely on the proper functions of wide repertoire of stem cells (SCs) persisting during embryonic period and throughout the adult life. Therefore, SCs employ robust mechanisms to preserve their genomic integrity and avoid heritage of mutations to their daughter cells. Importantly, propagation of SCs with faulty DNA as well as dedifferentiation of genomically altered somatic cells may result in derivation of cancer SCs, which are considered to be the driving force of the tumorigenic process...
April 1, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334319/erbb4-acts-as-a-suppressor-in-the-development-of-hepatocellular-carcinoma
#18
Yao Liu, Liming Song, Hengli Ni, Lina Sun, Weijuan Jiao, Lin Chen, Qun Zhou, Tong Shen, Hongxia Cui, Tianming Gao, Jianming Li
ERBB4, one member of the epidermal growth factor receptor (EGFR) family, plays a key role in physiological and pathological processes. Recently, we identified that ERBB4 played a protective role from chronic hepatitis B virus infection. However, the role of ERBB4 in hepatocellular carcinoma (HCC) is still unclear. Here, we explore the role of ERBB4 in the development of HCC using in vitro models, in vivo animal models and clinical samples of HCC. Liver-specific ERBB4 knockout alleles and full ERBB4 except heart knockout mice were used in this study...
April 1, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334272/17%C3%AE-estradiol-induced-acsl4-protein-expression-promotes-an-invasive-phenotype-in-estrogen-receptor-positive-mammary-carcinoma-cells
#19
Anissa Belkaid, Rodney J Ouellette, Marc E Surette
Long chain acyl-CoA synthase-4 (ACSL4) expression has been associated with an aggressive phenotype in breast carcinoma cells, whereas its role in ERα-positive breast cancer has not been studied. ACSL4 prefers 20-carbon polyunsaturated fatty acid (PUFA) substrates, and along with other ACSLs has been associated with cellular uptake of exogenous fatty acids. 17β-estradiol induces proliferation and invasive capacities in ERα+ve breast carcinoma that is associated with modifications of cellular lipid metabolism...
April 1, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334234/breast-cancer-risk-associated-variants-at-6q25-1-influence-risk-of-hepatocellular-carcinoma-in-a-chinese-population
#20
Jiaoyuan Li, Ying Wang, Ying Zhu, Yajie Gong, Yang Yang, Jianbo Tian, Yi Zhang, Danyi Zou, Xiating Peng, Juntao Ke, Jing Gong, Rong Zhong, Jiang Chang
The gender disparity observed in the incidence of hepatocellular carcinoma (HCC) suggests an important role of estrogens in HCC pathogenesis. In this study, we conducted a case-control study to investigate whether breast cancer risk-associated single nucleotide polymorphisms (SNPs) located at estrogens loci identified by genome-wide association studies (GWASs) also predispose to HCC in a Chinese population. Three candidate SNPs at 6q25.1 were genotyped in 2025 HCC cases and 2032 healthy controls. Differential expression analyses and expression quantitative trait loci (eQTL) analyses were conducted to further explore the potential function of significant SNPs and genes they reside in...
April 1, 2017: Carcinogenesis
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