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Start Over Author "Amankwah, Ernest K." Topic ovarian cancer
5 results on '"Amankwah, Ernest K."'

1. Epithelial-Mesenchymal Transition (EMT) Gene Variants and Epithelial Ovarian Cancer (EOC) Risk.

Author

Amankwah, Ernest K, Lin, Hui-Yi, Tyrer, Jonathan P, Lawrenson, Kate, Dennis, Joe, Chornokur, Ganna, Aben, Katja KH, Anton-Culver, Hoda, Antonenkova, Natalia, Bruinsma, Fiona, Bandera, Elisa V, Bean, Yukie T, Beckmann, Matthias W, Bisogna, Maria, Bjorge, Line, Bogdanova, Natalia, Brinton, Louise A, Brooks-Wilson, Angela, Bunker, Clareann H, Butzow, Ralf, Campbell, Ian G, Carty, Karen, Chen, Zhihua, Chen, Y Ann, Chang-Claude, Jenny, Cook, Linda S, Cramer, Daniel W, Cunningham, Julie M, Cybulski, Cezary, Dansonka-Mieszkowska, Agnieszka, du Bois, Andreas, Despierre, Evelyn, Dicks, Ed, Doherty, Jennifer A, Dörk, Thilo, Dürst, Matthias, Easton, Douglas F, Eccles, Diana M, Edwards, Robert P, Ekici, Arif B, Fasching, Peter A, Fridley, Brooke L, Gao, Yu-Tang, Gentry-Maharaj, Aleksandra, Giles, Graham G, Glasspool, Rosalind, Goodman, Marc T, Gronwald, Jacek, Harrington, Patricia, Harter, Philipp, Hasmad, Hanis N, Hein, Alexander, Heitz, Florian, Hildebrandt, Michelle AT, Hillemanns, Peter, Hogdall, Claus K, Hogdall, Estrid, Hosono, Satoyo, Iversen, Edwin S, Jakubowska, Anna, Jensen, Allan, Ji, Bu-Tian, Karlan, Beth Y, Jim, Heather, Kellar, Melissa, Kiemeney, Lambertus A, Krakstad, Camilla, Kjaer, Susanne K, Kupryjanczyk, Jolanta, Lambrechts, Diether, Lambrechts, Sandrina, Le, Nhu D, Lee, Alice W, Lele, Shashi, Leminen, Arto, Lester, Jenny, Levine, Douglas A, Liang, Dong, Lim, Boon Kiong, Lissowska, Jolanta, Lu, Karen, Lubinski, Jan, Lundvall, Lene, Massuger, Leon FAG, Matsuo, Keitaro, McGuire, Valerie, McLaughlin, John R, McNeish, Ian, Menon, Usha, Milne, Roger L, Modugno, Francesmary, Moysich, Kirsten B, Ness, Roberta B, Nevanlinna, Heli, Eilber, Ursula, Odunsi, Kunle, Olson, Sara H, Orlow, Irene, Orsulic, Sandra, and Weber, Rachel Palmieri

Subjects
Georgia Chenevix-Trench on behalf of the AOCS management group, Humans, Neoplasms, Glandular and Epithelial, Ovarian Neoplasms, Genetic Predisposition to Disease, Odds Ratio, Risk, Genotype, Polymorphism, Single Nucleotide, Adult, Aged, Middle Aged, European Continental Ancestry Group, Female, Genome-Wide Association Study, Epithelial-Mesenchymal Transition, Carcinoma, Ovarian Epithelial, epithelial-mesenchymal transition, ovarian cancer, single-nucleotide polymorphisms, Neoplasms, Glandular and Epithelial, Polymorphism, Single Nucleotide, Carcinoma, Ovarian Epithelial, Epidemiology, Public Health and Health Services, Genetics
Abstract

Epithelial-mesenchymal transition (EMT) is a process whereby epithelial cells assume mesenchymal characteristics to facilitate cancer metastasis. However, EMT also contributes to the initiation and development of primary tumors. Prior studies that explored the hypothesis that EMT gene variants contribute to epithelial ovarian carcinoma (EOC) risk have been based on small sample sizes and none have sought replication in an independent population. We screened 15,816 single-nucleotide polymorphisms (SNPs) in 296 genes in a discovery phase using data from a genome-wide association study of EOC among women of European ancestry (1,947 cases and 2,009 controls) and identified 793 variants in 278 EMT-related genes that were nominally (P < 0.05) associated with invasive EOC. These SNPs were then genotyped in a larger study of 14,525 invasive-cancer patients and 23,447 controls. A P-value

Published
2015

2. Common Genetic Variation In Cellular Transport Genes and Epithelial Ovarian Cancer (EOC) Risk

Author

Chornokur, Ganna, Lin, Hui-Yi, Tyrer, Jonathan P, Lawrenson, Kate, Dennis, Joe, Amankwah, Ernest K, Qu, Xiaotao, Tsai, Ya-Yu, Jim, Heather SL, Chen, Zhihua, Chen, Ann Y, Permuth-Wey, Jennifer, Aben, Katja KH, Anton-Culver, Hoda, Antonenkova, Natalia, Bruinsma, Fiona, Bandera, Elisa V, Bean, Yukie T, Beckmann, Matthias W, Bisogna, Maria, Bjorge, Line, Bogdanova, Natalia, Brinton, Louise A, Brooks-Wilson, Angela, Bunker, Clareann H, Butzow, Ralf, Campbell, Ian G, Carty, Karen, Chang-Claude, Jenny, Cook, Linda S, Cramer, Daniel W, Cunningham, Julie M, Cybulski, Cezary, Dansonka-Mieszkowska, Agnieszka, du Bois, Andreas, Despierre, Evelyn, Dicks, Ed, Doherty, Jennifer A, Dörk, Thilo, Dürst, Matthias, Easton, Douglas F, Eccles, Diana M, Edwards, Robert P, Ekici, Arif B, Fasching, Peter A, Fridley, Brooke L, Gao, Yu-Tang, Gentry-Maharaj, Aleksandra, Giles, Graham G, Glasspool, Rosalind, Goodman, Marc T, Gronwald, Jacek, Harrington, Patricia, Harter, Philipp, Hein, Alexander, Heitz, Florian, Hildebrandt, Michelle AT, Hillemanns, Peter, Hogdall, Claus K, Hogdall, Estrid, Hosono, Satoyo, Jakubowska, Anna, Jensen, Allan, Ji, Bu-Tian, Karlan, Beth Y, Kelemen, Linda E, Kellar, Mellissa, Kiemeney, Lambertus A, Krakstad, Camilla, Kjaer, Susanne K, Kupryjanczyk, Jolanta, Lambrechts, Diether, Lambrechts, Sandrina, Le, Nhu D, Lee, Alice W, Lele, Shashi, Leminen, Arto, Lester, Jenny, Levine, Douglas A, Liang, Dong, Lim, Boon Kiong, Lissowska, Jolanta, Lu, Karen, Lubinski, Jan, Lundvall, Lene, Massuger, Leon FAG, Matsuo, Keitaro, McGuire, Valerie, McLaughlin, John R, McNeish, Iain, Menon, Usha, Milne, Roger L, Modugno, Francesmary, Moysich, Kirsten B, Ness, Roberta B, Nevanlinna, Heli, Eilber, Ursula, Odunsi, Kunle, Olson, Sara H, and Orlow, Irene

Subjects
Biological Sciences, Biomedical and Clinical Sciences, Oncology and Carcinogenesis, Genetics, Cancer, Ovarian Cancer, Rare Diseases, 2.1 Biological and endogenous factors, Aetiology, Black or African American, Alleles, Asian, Biological Transport, Carcinoma, Ovarian Epithelial, Carrier Proteins, Case-Control Studies, Female, Genetic Association Studies, Genetic Predisposition to Disease, Genetic Variation, Humans, Neoplasms, Glandular and Epithelial, Odds Ratio, Ovarian Neoplasms, Polymorphism, Single Nucleotide, Risk, Georgia Chenevix-Trench, AOCS management group, General Science & Technology
Abstract

BackgroundDefective cellular transport processes can lead to aberrant accumulation of trace elements, iron, small molecules and hormones in the cell, which in turn may promote the formation of reactive oxygen species, promoting DNA damage and aberrant expression of key regulatory cancer genes. As DNA damage and uncontrolled proliferation are hallmarks of cancer, including epithelial ovarian cancer (EOC), we hypothesized that inherited variation in the cellular transport genes contributes to EOC risk.MethodsIn total, DNA samples were obtained from 14,525 case subjects with invasive EOC and from 23,447 controls from 43 sites in the Ovarian Cancer Association Consortium (OCAC). Two hundred seventy nine SNPs, representing 131 genes, were genotyped using an Illumina Infinium iSelect BeadChip as part of the Collaborative Oncological Gene-environment Study (COGS). SNP analyses were conducted using unconditional logistic regression under a log-additive model, and the FDR q

Published
2015

3. Global ovarian cancer health disparities

Author

Chornokur, Ganna, Amankwah, Ernest K., Schildkraut, Joellen M., and Phelan, Catherine M.

Subjects
*OVARIAN cancer treatment, *HEALTH equity, *LITERATURE reviews, *CANCER research, *AFRICAN American women, *CANCER-related mortality, *SOCIOECONOMIC factors, *DISEASES
Abstract

Abstract: Objective: The objective of this article is to broadly review the scientific literature and summarize the most up-to-date findings on ovarian cancer health disparities worldwide and in the United States (U.S.). Methods: The present literature on disparities in ovarian cancer was reviewed. Original research and relevant review articles were included. Results: Ovarian cancer health disparities exist worldwide and in the U.S. Ovarian cancer disproportionately affect African American women at all stages of the disease, from presentation through treatment, and ultimately increased mortality and decreased survival, compared to non-Hispanic White women. Increased mortality is likely to be explained by unequal access to care and non-standard treatment regimens frequently administered to African American women, but may also be attributed to genetic susceptibility, acquired co-morbid conditions and increased frequency of modifiable risk factors, albeit to substantially lesser extent. Unequal access to care is, in turn, largely a consequence of lower socioeconomic status and lack of private health insurance coverage among the African American population. Conclusions: Our findings suggest the need for policy changes aimed at facilitating equal access to quality medical care. At the same time, further research is necessary to fully resolve racial disparities in ovarian cancer. [Copyright &y& Elsevier]

Published
2013
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4. Polymorphisms in Stromal Genes and Susceptibility to Serous Epithelial Ovarian Cancer: A Report from the Ovarian Cancer Association Consortium.

Author

Amankwah, Ernest K., Qinggang Wang, Schildkraut, Joellen M., Ya-Yu Tsai, Ramus, Susan J., Fridley, Brooke L., Beesley, Jonathan, Johnatty, Sharon E., Webb, Penelope M., Chenevix-Trench, Georgia, Dale, Laura C., Lambrechts, Diether, Amant, Frederic, Despierre, Evelyn, Vergote, Ignace, Gayther, Simon A., Gentry-Maharaj, Aleksandra, Menon, Usha, Chang-Claude, Jenny, and Shan Wang-Gohrke

Subjects
*OVARIAN cancer, *GENETIC polymorphisms, *ADNEXA uteri, *GONADS, *TUMORS
Abstract

Alterations in stromal tissue components can inhibit or promote epithelial tumorigenesis. Decorin (DCN) and lumican (LUM) show reduced stromal expression in serous epithelial ovarian cancer (sEOC). We hypothesized that common variants in these genes associate with risk. Associations with sEOC among Caucasians were estimated with odds ratios (OR) among 397 cases and 920 controls in two U.S.-based studies (discovery set), 436 cases and 1,098 controls in Australia (replication set 1) and a consortium of 15 studies comprising 1,668 cases and 4,249 controls (replication set 2). The discovery set and replication set 1 (833 cases and 2,013 controls) showed statistically homogeneous (Pheterogeneity≥0.48) decreased risks of sEOC at four variants: DCN rs3138165, rs13312816 and rs516115, and LUM rs17018765 (OR = 0.6 to 0.9; Ptrend, = 0.001 to 0.03). Results from replication set 2 were statistically homogeneous (Pheterogeneity≤0.13) and associated with increased risks at DCN rs3138165 and rs13312816, and LUM rs17018765: all ORs = 1.2; Ptrend≥0.02. The ORs at the four variants were statistically heterogeneous across all 18 studies (Pheterogeneity≤0.03), which precluded combining. In post-hoc analyses, interactions were observed between each variant and recruitment period (Pinteraction≤0.003), age at diagnosis (Pinteraction = 0.04), and year of diagnosis (Pinteraction = 0.05) in the five studies with available information (1,044 cases, 2,469 controls). We conclude that variants in DCN and LUM are not directly associated with sEOC, and that confirmation of possible effect modification of the variants by non-genetic factors is required. [ABSTRACT FROM AUTHOR]

Published
2011
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5. Epithelial-Mesenchymal Transition (EMT) Gene Variants and Epithelial Ovarian Cancer (EOC) Risk

Author

Amankwah, Ernest K., Lin, Hui-Yi, Tyrer, Jonathan P., Lawrenson, Kate, Dennis, Joe, Chornokur, Ganna, Aben, Katja K. H., Anton-Culver, Hoda, Antonenkova, Natalia, Bruinsma, Fiona, Bandera, Elisa V., Bean, Yukie T., Beckmann, Matthias W., Bisogna, Maria, Bjorge, Line, Bogdanova, Natalia, Brinton, Louise A., Brooks-Wilson, Angela, Bunker, Clareann H., Butzow, Ralf, Campbell, Ian G., Carty, Karen, Chen, Zhihua, Chen, Y. Ann, Chang-Claude, Jenny, Cook, Linda S., Cramer, Daniel William, Cunningham, Julie M., Cybulski, Cezary, Dansonka-Mieszkowska, Agnieszka, du Bois, Andreas, Despierre, Evelyn, Dicks, Ed, Doherty, Jennifer A., Dörk, Thilo, Dürst, Matthias, Easton, Douglas F., Eccles, Diana M., Edwards, Robert P., Ekici, Arif B., Fasching, Peter A., Fridley, Brooke L., Gao, Yu-Tang, Gentry-Maharaj, Aleksandra, Giles, Graham G., Glasspool, Rosalind, Goodman, Marc T., Gronwald, Jacek, Harrington, Patricia, Harter, Philipp, Hasmad, Hanis N., Hein, Alexander, Heitz, Florian, Hildebrandt, Michelle A. T., Hillemanns, Peter, Hogdall, Claus K., Hogdall, Estrid, Hosono, Satoyo, Iversen, Edwin S., Jakubowska, Anna, Jensen, Allan, Ji, Bu-Tian, Karlan, Beth Y., Jim, Heather, Kellar, Melissa, Kiemeney, Lambertus A., Krakstad, Camilla, Kjaer, Susanne K., Kupryjanczyk, Jolanta, Lambrechts, Diether, Lambrechts, Sandrina, Le, Nhu D., Lee, Alice W., Lele, Shashi, Leminen, Arto, Lester, Jenny, Levine, Douglas A., Liang, Dong, Lim, Boon Kiong, Lissowska, Jolanta, Lu, Karen, Lubinski, Jan, Lundvall, Lene, Massuger, Leon F. A. G., Matsuo, Keitaro, McGuire, Valerie, McLaughlin, John R., McNeish, Ian, Menon, Usha, Milne, Roger L., Modugno, Francesmary, Moysich, Kirsten B., Ness, Roberta B., Nevanlinna, Heli, Eilber, Ursula, Odunsi, Kunle, Olson, Sara H., Orlow, Irene, Orsulic, Sandra, Weber, Rachel Palmieri, Paul, James, Pearce, Celeste L., Pejovic, Tanja, Pelttari, Liisa M., Permuth-Wey, Jennifer, Pike, Malcolm C., Poole, Elizabeth M., Risch, Harvey A., Rosen, Barry, Rossing, Mary Anne, Rothstein, Joseph H., Rudolph, Anja, Runnebaum, Ingo B., Rzepecka, Iwona K., Salvesen, Helga B., Schernhammer, Eva S, Schwaab, Ira, Shu, Xiao-Ou, Shvetsov, Yurii B., Siddiqui, Nadeem, Sieh, Weiva, Song, Honglin, Southey, Melissa C., Spiewankiewicz, Beata, Sucheston-Campbell, Lara, Teo, Soo-Hwang, Terry, Kathryn Lynne, Thompson, Pamela J., Thomsen, Lotte, Tangen, Ingvild L., Tworoger, Shelley Slate, van Altena, Anne M., Vierkant, Robert A., Vergote, Ignace, Walsh, Christine S., Wang-Gohrke, Shan, Wentzensen, Nicolas, Whittemore, Alice S., Wicklund, Kristine G., Wilkens, Lynne R., Wu, Anna H., Wu, Xifeng, Woo, Yin-Ling, Yang, Hannah, Zheng, Wei, Ziogas, Argyrios, Kelemen, Linda E., Berchuck, Andrew, Schildkraut, Joellen M., Ramus, Susan J., Goode, Ellen L., Monteiro, Alvaro N. A., Gayther, Simon A., Narod, Steven A., Pharoah, Paul D. P., Sellers, Thomas A., and Phelan, Catherine M.

Subjects
ovarian cancer, epithelial-mesenchymal transition, single nucleotide polymorphisms
Abstract

Epithelial-mesenchymal transition (EMT) is a process whereby epithelial cells assume mesenchymal characteristics to facilitate cancer metastasis. However, EMT also contributes to the initiation and development of primary tumors. Prior studies that explored the hypothesis that EMT gene variants contribute to epithelial ovarian carcinoma (EOC) risk have been based on small sample sizes and none have sought replication in an independent population. We screened 15,816 single-nucleotide polymorphisms (SNPs) in 296 genes in a discovery phase using data from a genome-wide association study of EOC among women of European ancestry (1,947 cases and 2,009 controls) and identified 793 variants in 278 EMT-related genes that were nominally (P < 0.05) associated with invasive EOC. These SNPs were then genotyped in a larger study of 14,525 invasive-cancer patients and 23,447 controls. A P-value <0.05 and a false discovery rate (FDR) <0.2 were considered statistically significant. In the larger dataset, GPC6/GPC5 rs17702471 was associated with the endometrioid subtype among Caucasians (odds ratio (OR) = 1.16, 95% CI = 1.07-1.25, P = 0.0003, FDR = 0.19), whereas F8 rs7053448 (OR = 1.69, 95% CI = 1.27-2.24, P = 0.0003, FDR = 0.12), F8 rs7058826 (OR = 1.69, 95% CI = 1.27-2.24, P = 0.0003, FDR = 0.12), and CAPN13 rs1983383 (OR = 0.79, 95% CI = 0.69-0.90, P = 0.0005, FDR = 0.12) were associated with combined invasive EOC among Asians. In silico functional analyses revealed that GPC6/GPC5 rs17702471 coincided with DNA regulatory elements. These results suggest that EMT gene variants do not appear to play a significant role in the susceptibility to EOC., Other Research Unit

Published
2015
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