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102. Germline mutation in the juxtamembrane domain of the kit gene in a family with gastrointestinal stromal tumors and urticaria pigmentosa

Author

Beghini, A, Tibiletti, M, Roversi, G, Chiaravalli, A, Serio, G, Capella, C, Larizza, L, Larizza, L., ROVERSI, GAIA, Beghini, A, Tibiletti, M, Roversi, G, Chiaravalli, A, Serio, G, Capella, C, Larizza, L, Larizza, L., and ROVERSI, GAIA

Abstract

BACKGROUND. Gain-of-function mutations of the c-kit protooncogene, mainly clustered in the juxtamembrane domain, have been reported in a significant fraction of gastrointestinal (GI) stromal tumors (GISTs) that represent the most common mesenchymal tumor of the GI tract. Two families also have been described with a GIST predisposition syndrome with a germline c-kit mutation affecting either the juxtamembrane domain or the tyrosine kinase domain. Here, the authors report on a family in which the dominantly inherited trait of hyper-pigmented spots was inherited from an individual who developed multiple GISTs with diffuse hyperplasia of the myenteric plexus by his son, who was affected with urticaria pigmentosa. METHODS. Screening for the c-kit mutation was performed by means of polymerase chain reaction-based denaturing gradient gel electrophoresis/constant denaturing gel electrophoresis followed by direct sequencing of abnormal conformers. Expression of KIT and CD34 was determined by immunohistochemistry. RESULTS. In peripheral blood DNA samples, both affected family members showed a previously undescribed c-kit mutation in the juxtamembrane domain, resulting in the substitution of alanine for valine(559). Mutation and polymorphic marker analyses on DNA samples from three GISTs and two skin biopsy specimens evidenced the same mutation in the heterozygous condition. Immunohistochemical examination showed coexpression of CD117 (c-kit) and CD34 in all independent GISTs and CD117 positivity in mast cells from the skin lesions. CONCLUSIONS. Comparative analysis of clinical presentation and mutation mapping in the families described to date point to the peculiar association of mast cells, melanocytic dysfunction, and GIST predisposition in carriers of c-kit mutations within the juxtamembrane domain. Cancer 200 1;92:657-62. (C) 2001 American Cancer Society.

Published
2001

103. RNA hyperediting and alternative splicing of hematopoietic cell phosphatase (PTPN6) gene in acute myeloid leukemia

Author

Beghini, A, Ripamonti, C, Peterlongo, P, Roversi, G, Cairoli, R, Morra, E, Larizza, L, ROVERSI, GAIA, Larizza, L., Beghini, A, Ripamonti, C, Peterlongo, P, Roversi, G, Cairoli, R, Morra, E, Larizza, L, ROVERSI, GAIA, and Larizza, L.

Abstract

The SH2 domain-containing tyrosine phosphatase PTPN6 (SHP-1, PTP1C, HCP) is a 68 kDa cytoplasmic protein primarily expressed in hematopoietic cell development, proliferation and receptor-mediated mitogenic signaling pathways. By means of direct dephosphorylation, it down-regulates a broad spectrum of growth-promoting receptors, including the Kit tyrosine kinase, activated to elicit a prominent cascade of intracellular events by stem cell factor binding. The pivotal contribution of PTPN6 in modulating myeloid cell signaling has been revealed by the finding that shp-1 mutation is responsible for the overexpansion and inappropriate activation of myelomonocytic populations in motheaten (me/me) and motheaten viable (me(v)/me(v)) mice. Association of PTPN6 with c-Kit and negative modulation of the myeloid leukocyte signal transduction pathways prompted us to examine the expression of the protein tyrosine phosphatase PTPN6 gene in CD34+/CD117+ blasts from acute myeloid leukemia patients. We identified and cloned cDNAs representing novel PTPN6 mRNA species, derived from aberrant splicing within the N-SH2 domain leading to retention of intron 3. Sequence analysis of cDNA clones revealed multiple A→G editing conversions. The editing of PTPN6 mRNA mainly occurred as an A→G conversion of A7866, which represents the putative branch site in IVS3 of PTPN6 mRNA. Evidence that editing of A7866 abrogates splicing has been obtained in vitro by using an edited clone and its backward clone generated by site-directed mutagenesis. The level of the aberrant intron-retaining splice variant, evaluated by semi-quantitative RT-PCR, was lower in CD117+-AML bone marrow mononuclear cells at remission than at diagnosis, suggesting the involvement of post-transcriptional PTPN6 processing in leukemogenesis.

Published
2000

107. RNA processing defects of the helicase gene <TOGGLE>RECQL4</TOGGLE> in a compound heterozygous Rothmund–Thomson patient

Author

Beghini, Alessandro, Castorina, Pierangela, Roversi, Gaia, Modiano, Philippe, and Larizza, Lidia

Abstract

Rothmund–Thomson syndrome (RTS) (OMIM 268400) is an autosomal recessive genodermatosis associated with genomic instability and increased risk of mesenchymal cancers. Mutations in the RECQL4 gene, encoding a protein of the family of Werner (WRN) and Bloom (BLM) helicases, have been identified in a subset of RTS patients. Apart from congenital poikiloderma, the clinical presentation of RTS is widely variable, raising the question of the possible existence of a second locus. Results herein reported on a sporadic Caucasian patient emphasize the concept that mutation analyses at both DNA and RNA level complement the genetic defect suggested by clinical and cytogenetic signs. The patient presented with typical congenital poikiloderma and bone defects and exhibited significant genomic instability in the peripheral blood karyotype. By RECQL4 DNA mutation analysis, he was found to carry a 1473delT (mut 5) on one allele and an AG to AC change at the 3'-splice site of exon 13 (a variant of mut 4) on the second allele. RT-PCR analysis of RECQL4 cDNA encompassing the entire helicase domain showed diffuse splicing defects indicating that the loss of a single 3'-splice signal motif disregulates the correct splice-site selection and affects the overall RNA processing. The presence of an unstable minisatellite which ends at 3'-splice site of IVS12 may enhance the mutation at this site. This genomic feature together with a number of short introns in the RECQL4 gene may account for the common missplicing of RECQL4 mRNA. While it is possible that defects of RECQL4 mRNA processing might account for part of the clinical variability observed for this syndrome, only a thorough analysis at both genomic and RNA level may allow a genotype–phenotype correlation in RTS patients, restricting the search of a second RTS locus to the specific patients. © 2003 Wiley-Liss, Inc.

Published
2003
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108. Associations of common breast cancer susceptibility alleles with risk of breast cancer subtypes in BRCA1 and BRCA2 mutation carriers

Author

Kuchenbaecker, Karoline B, Neuhausen, Susan L, Robson, Mark, Barrowdale, Daniel, McGuffog, Lesley, Mulligan, Anna Marie, Andrulis, Irene L, Spurdle, Amanda B, Schmidt, Marjanka K, Schmutzler, Rita K, Engel, Christoph, Wappenschmidt, Barbara, Nevanlinna, Heli, Thomassen, Mads, Southey, Melissa, Radice, Paolo, Ramus, Susan J, Domchek, Susan M, Nathanson, Katherine L, Lee, Andrew, Healey, Sue, Nussbaum, Robert L, Rebbeck, Timothy R, Arun, Banu K, James, Paul, Karlan, Beth Y, Lester, Jenny, Cass, Ilana, Breast Cancer Family Registry, the, Terry, Mary Beth, Daly, Mary B, Goldgar, David E, Buys, Saundra S, Janavicius, Ramunas, Tihomirova, Laima, Tung, Nadine, Dorfling, Cecilia M, van Rensburg, Elizabeth J, Steele, Linda, v O Hansen, Thomas, Ejlertsen, Bent, Gerdes, Anne-Marie, Nielsen, Finn C, Dennis, Joe, Cunningham, Julie, Hart, Steven, Slager, Susan, Osorio, Ana, Benitez, Javier, Duran, Mercedes, Weitzel, Jeffrey N, Tafur, Isaac, Hander, Mary, Peterlongo, Paolo, Manoukian, Siranoush, Peissel, Bernard, Roversi, Gaia, Scuvera, Giulietta, Bonanni, Bernardo, Mariani, Paolo, Volorio, Sara, Dolcetti, Riccardo, Varesco, Liliana, Papi, Laura, Tibiletti, Maria Grazia, Giannini, Giuseppe, Fostira, Florentia, Konstantopoulou, Irene, Garber, Judy, Hamann, Ute, Donaldson, Alan, Brewer, Carole, Foo, Claire, Evans, D Gareth, Frost, Debra, Eccles, Diana, EMBRACE Study, the, Douglas, Fiona, Brady, Angela, Cook, Jackie, Tischkowitz, Marc, Adlard, Julian, Barwell, Julian, Ong, Kai-ren, Walker, Lisa, Izatt, Louise, Side, Lucy E, Kennedy, M John, Rogers, Mark T, Porteous, Mary E, Morrison, Patrick J, Platte, Radka, Eeles, Ros, Davidson, Rosemarie, Hodgson, Shirley, Ellis, Steve, Godwin, Andrew K, Rhiem, Kerstin, Meindl, Alfons, Ditsch, Nina, Arnold, Norbert, Plendl, Hansjoerg, Niederacher, Dieter, Sutter, Christian, Steinemann, Doris, Bogdanova-Markov, Nadja, Kast, Karin, Varon-Mateeva, Raymonda, Wang-Gohrke, Shan, Gehrig, Andrea, Markiefka, Birgid, Buecher, Bruno, Lefol, Cédrick, Stoppa-Lyonnet, Dominique, Rouleau, Etienne, Prieur, Fabienne, Damiola, Francesca, GEMO Study Collaborators, the, Barjhoux, Laure, Faivre, Laurence, Longy, Michel, Sevenet, Nicolas, Sinilnikova, Olga M, Mazoyer, Sylvie, Bonadona, Valérie, Caux-Moncoutier, Virginie, Isaacs, Claudine, Van Maerken, Tom, Claes, Kathleen, Piedmonte, Marion, Andrews, Lesley, Hays, John, Rodriguez, Gustavo C, Caldes, Trinidad, de la Hoya, Miguel, Khan, Sofia, Hogervorst, Frans BL, Aalfs, Cora M, de Lange, JL, Meijers-Heijboer, Hanne EJ, van der Hout, Annemarie H, Wijnen, Juul T, van Roozendaal, KEP, Mensenkamp, Arjen R, van den Ouweland, Ans MW, van Deurzen, Carolien HM, van der Luijt, Rob B, HEBON, ., Olah, Edith, Diez, Orland, Lazaro, Conxi, Blanco, Ignacio, Teulé, Alex, Menendez, Mireia, Jakubowska, Anna, Lubinski, Jan, Cybulski, Cezary, Gronwald, Jacek, Jaworska-Bieniek, Katarzyna, Durda, Katarzyna, Arason, Adalgeir, Maugard, Christine, Soucy, Penny, Montagna, Marco, Agata, Simona, Teixeira, Manuel R, KConFab Investigators, the, Olswold, Curtis, Lindor, Noralane, Pankratz, Vernon S, Hallberg, Emily, Wang, Xianshu, Szabo, Csilla I, Vijai, Joseph, Jacobs, Lauren, Corines, Marina, Lincoln, Anne, Berger, Andreas, Fink-Retter, Anneliese, Singer, Christian F, Rappaport, Christine, Gschwantler Kaulich, Daphne, Pfeiler, Georg, Tea, Muy-Kheng, Phelan, Catherine M, Mai, Phuong L, Greene, Mark H, Rennert, Gad, Imyanitov, Evgeny N, Glendon, Gord, Toland, Amanda Ewart, Bojesen, Anders, Pedersen, Inge Sokilde, Jensen, Uffe Birk, Caligo, Maria A, Friedman, Eitan, Berger, Raanan, Laitman, Yael, Rantala, Johanna, Arver, Brita, Loman, Niklas, Borg, Ake, Ehrencrona, Hans, Olopade, Olufunmilayo I, Simard, Jacques, Easton, Douglas F, Chenevix-Trench, Georgia, Offit, Kenneth, Couch, Fergus J, Antoniou, Antonis C, CIMBA, on behalf of, Kuchenbaecker, K, Neuhausen, S, Robson, M, Barrowdale, D, Mcguffog, L, Mulligan, A, Andrulis, I, Spurdle, A, Schmidt, M, Schmutzler, R, Engel, C, Wappenschmidt, B, Nevanlinna, H, Thomassen, M, Southey, M, Radice, P, Ramus, S, Domchek, S, Nathanson, K, Lee, A, Healey, S, Nussbaum, R, Rebbeck, T, Arun, B, James, P, Karlan, B, Lester, J, Cass, I, Breast Cancer Family, R, Terry, M, Daly, M, Goldgar, D, Buys, S, Janavicius, R, Tihomirova, L, Tung, N, Dorfling, C, van Rensburg, E, Steele, L, v. O. Hansen, T, Ejlertsen, B, Gerdes, A, Nielsen, F, Dennis, J, Cunningham, J, Hart, S, Slager, S, Osorio, A, Benitez, J, Duran, M, Weitzel, J, Tafur, I, Hander, M, Peterlongo, P, Manoukian, S, Peissel, B, Roversi, G, Scuvera, G, Bonanni, B, Mariani, P, Volorio, S, Dolcetti, R, Varesco, L, Papi, L, Tibiletti, M, Giannini, G, Fostira, F, Konstantopoulou, I, Garber, J, Hamann, U, Donaldson, A, Brewer, C, Foo, C, Evans, D, Frost, D, Eccles, D, Embrace, S, Douglas, F, Brady, A, Cook, J, Tischkowitz, M, Adlard, J, Barwell, J, Ong, K, Walker, L, Izatt, L, Side, L, Kennedy, M, Rogers, M, Porteous, M, Morrison, P, Platte, R, Eeles, R, Davidson, R, Hodgson, S, Ellis, S, Godwin, A, Rhiem, K, Meindl, A, Ditsch, N, Arnold, N, Plendl, H, Niederacher, D, Sutter, C, Steinemann, D, Bogdanova Markov, N, Kast, K, Varon Mateeva, R, Wang Gohrke, S, Gehrig, A, Markiefka, B, Buecher, B, Lefol, C, Stoppa Lyonnet, D, Rouleau, E, Prieur, F, Damiola, F, GEMO Study, C, Barjhoux, L, Faivre, L, Longy, M, Sevenet, N, Sinilnikova, O, Mazoyer, S, Bonadona, V, Caux Moncoutier, V, Isaacs, C, Van Maerken, T, Claes, K, Piedmonte, M, Andrews, L, Hays, J, Rodriguez, G, Caldes, T, de la Hoya, M, Khan, S, Hogervorst, F, Aalfs, C, de Lange, J, Meijers Heijboer, H, van der Hout, A, Wijnen, J, van Roozendaal, K, Mensenkamp, A, van den Ouweland, A, van Deurzen, C, van der Luijt, R, Hebon, Olah, E, Diez, O, Lazaro, C, Blanco, I, Teulé, A, Menendez, M, Jakubowska, A, Lubinski, J, Cybulski, C, Gronwald, J, Jaworska Bieniek, K, Durda, K, Arason, A, Maugard, C, Soucy, P, Montagna, M, Agata, S, Teixeira, M, Kconfab, I, Olswold, C, Lindor, N, Pankratz, V, Hallberg, E, Wang, X, Szabo, C, Vijai, J, Jacobs, L, Corines, M, Lincoln, A, Berger, A, Fink Retter, A, Singer, C, Rappaport, C, Kaulich, D, Pfeiler, G, Tea, M, Phelan, C, Mai, P, Greene, M, Rennert, G, Imyanitov, E, Glendon, G, Toland, A, Bojesen, A, Pedersen, I, Jensen, U, Caligo, M, Friedman, E, Berger, R, Laitman, Y, Rantala, J, Arver, B, Loman, N, Borg, A, Ehrencrona, H, Olopade, O, Simard, J, Easton, D, Chenevix Trench, G, Offit, K, Couch, F, Antoniou, A, Cimba, Lee, Andrew [0000-0003-0677-0252], Dennis, Joe [0000-0003-4591-1214], Tischkowitz, Marc [0000-0002-7880-0628], Easton, Douglas [0000-0003-2444-3247], Antoniou, Antonis [0000-0001-9223-3116], and Apollo - University of Cambridge Repository

Subjects
Cancer Research, Receptor, ErbB-2, Genes, BRCA2, BRCA, LOCI, Genes, BRCA1, MODIFIERS, VARIANTS, ErbB-2, 610 Medical sciences Medicine, Ductal, Receptors, Medicine and Health Sciences, INVESTIGATORS, Breast, skin and connective tissue diseases, Progesterone, Medicine(all), Carcinoma, Ductal, Breast, Middle Aged, Adult, Aged, Alleles, Breast Neoplasms, Carcinoma, Carcinoma, Lobular, Female, Genetic Predisposition to Disease, Heterozygote, Humans, Neoplasm Grading, Neoplasm Staging, Receptors, Estrogen, Receptors, Progesterone, Oncology, TUMOR SUBTYPES, Receptor, Research Article, MEDULLARY CARCINOMA, OVARIAN-CANCER, Lobular, GENOME-WIDE ASSOCIATION, CONSORTIUM, BRCA1, Estrogen, BRCA2, ESTROGEN-RECEPTOR, Genes
Abstract

Introduction More than 70 common alleles are known to be involved in breast cancer (BC) susceptibility, and several exhibit significant heterogeneity in their associations with different BC subtypes. Although there are differences in the association patterns between BRCA1 and BRCA2 mutation carriers and the general population for several loci, no study has comprehensively evaluated the associations of all known BC susceptibility alleles with risk of BC subtypes in BRCA1 and BRCA2 carriers. Methods We used data from 15,252 BRCA1 and 8,211 BRCA2 carriers to analyze the associations between approximately 200,000 genetic variants on the iCOGS array and risk of BC subtypes defined by estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2) and triple-negative- (TN) status; morphologic subtypes; histological grade; and nodal involvement. Results The estimated BC hazard ratios (HRs) for the 74 known BC alleles in BRCA1 carriers exhibited moderate correlations with the corresponding odds ratios from the general population. However, their associations with ER-positive BC in BRCA1 carriers were more consistent with the ER-positive associations in the general population (intraclass correlation (ICC) = 0.61, 95% confidence interval (CI): 0.45 to 0.74), and the same was true when considering ER-negative associations in both groups (ICC = 0.59, 95% CI: 0.42 to 0.72). Similarly, there was strong correlation between the ER-positive associations for BRCA1 and BRCA2 carriers (ICC = 0.67, 95% CI: 0.52 to 0.78), whereas ER-positive associations in any one of the groups were generally inconsistent with ER-negative associations in any of the others. After stratifying by ER status in mutation carriers, additional significant associations were observed. Several previously unreported variants exhibited associations at P

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109. Exploring the link between MORF4L1 and risk of breast cancer

Author

Pontificia Universidad Javeriana. Facultad de Medicina. Instituto de Genética Humana, Martrat, Griselda, Maxwell, Christopher A., Tominaga, Emiko, Porta-de-la-Riva, Montserrat, Bonifaci, Núria, Gómez-Baldó, Laia, Bogliolo, Massimo, Lázaro, Conxi, Blanco, Ignacio, Brunet, Joan, Aguilar, Helena, Fernández-Rodríguez, Juana, Seal, Sheila, Renwick, Anthony, Rahman, Nazneen, Kühl, Julia, Neveling, Kornelia, Schindler, Detlev, Ramírez, María J., Castellà, María, Hernández, Gonzalo, EMBRACE, Easton, Douglas F., Peock, Susan, Cook, Margaret, Oliver, Clare T., Frost, Debra, Platte, Radka, Evans, D. Gareth, Lalloo, Fiona, Eeles, Rosalind, Izatt, Louise, Chu, Carol, Davidson, Rosemarie, Ong, Kai-Ren, Cook, Jackie, Douglas, Fiona, Hodgson, Shirley, Brewer, Carole, Morrison, Patrick J., Porteous, Mary, Peterlongo, Paolo, Manoukian, Siranoush, Peissel, Bernard, Zaffaroni, Daniela, Roversi, Gaia, Barile, Monica, Viel, Alessandra, Pasini, Barbara, Ottini, Laura, Putignano, Anna Laura, Savarese, Antonella, Bernard, Loris, Radice, Paolo, Healey, Sue, Spurdle, Amanda, Chen, Xiaoqing, Beesley, Jonathan, kConFab Investigators, Rookus, Matti A., Verhoef, Senno, Tilanus-Linthorst, Madeleine A., Vreeswijk, Maaike P., Asperen, Christi J., Bodmer, Danielle, Van Os, Theo A., Blok, Marinus J., Hogervorst, Frans BL, HEBON, Goldgar, David E., Ausems, Margreet G. E. M., Meijers-Heijboer, Hanne E. J., Buys, Saundra, John, Esther M., Miron, Alexander, Southey, Melissa, Daly, Mary B., BCFR, SWE-BRCA, Harbst, Katja, Borg, Ake, Rantala, Johanna, Barbany-Bustinza, Gisela, Ehrencrona, Hans, Stenmark-Askmalm, Marie, Kaufman, Bella, Laitman, Yael, Milgrom, Roni, Friedman, Eitan, Domchek, Susan M., Nathanson, Katherine L., Rebbeck, Timothy R., Johannsson, Oskar Thor, Couch, Fergus J., Wang, Xianshu, Fredericksen, Zachary, Cuadras, Daniel, Moreno, Víctor, Pientka, Friederike K., Depping, Reinhard, Caldés, Trinidad, Osorio, Ana, Benítez, Javier, Bueren, Juan, Heikkinen, Tuomas, Nevanlinna, Heli, Hamann, Ute, Torres, Diana, Caligo, Maria Adelaide, Godwin, Andrew K., Imyanitov, Evgeny N., Janavicius, Ramunas, GEMO Study Collaborators, Sinilnikova, Olga M., Stoppa-Lyonnet, Dominique, Mazoyer, Sylvie, Verny-Pierre, Carole, Castera, Laurent, De Pauw, Antoine, Bignon, Yves-Jean, Uhrhammer, Nancy, Peyrat, Jean-Philippe, Vennin, Philippe, Ferrer, Sandra Fert, Collonge-Rame, Marie-Agnès, Mortemousque, Isabelle, McGuffog, Lesley, Chenevix-Trench, Georgia, Pereira-Smith, Olivia M., Antoniou, Antonis C., Cerón, Julián, Tominaga, Kaoru, Surrallés, Jordi, Pujana, Miguel Angel, Pontificia Universidad Javeriana. Facultad de Medicina. Instituto de Genética Humana, Martrat, Griselda, Maxwell, Christopher A., Tominaga, Emiko, Porta-de-la-Riva, Montserrat, Bonifaci, Núria, Gómez-Baldó, Laia, Bogliolo, Massimo, Lázaro, Conxi, Blanco, Ignacio, Brunet, Joan, Aguilar, Helena, Fernández-Rodríguez, Juana, Seal, Sheila, Renwick, Anthony, Rahman, Nazneen, Kühl, Julia, Neveling, Kornelia, Schindler, Detlev, Ramírez, María J., Castellà, María, Hernández, Gonzalo, EMBRACE, Easton, Douglas F., Peock, Susan, Cook, Margaret, Oliver, Clare T., Frost, Debra, Platte, Radka, Evans, D. Gareth, Lalloo, Fiona, Eeles, Rosalind, Izatt, Louise, Chu, Carol, Davidson, Rosemarie, Ong, Kai-Ren, Cook, Jackie, Douglas, Fiona, Hodgson, Shirley, Brewer, Carole, Morrison, Patrick J., Porteous, Mary, Peterlongo, Paolo, Manoukian, Siranoush, Peissel, Bernard, Zaffaroni, Daniela, Roversi, Gaia, Barile, Monica, Viel, Alessandra, Pasini, Barbara, Ottini, Laura, Putignano, Anna Laura, Savarese, Antonella, Bernard, Loris, Radice, Paolo, Healey, Sue, Spurdle, Amanda, Chen, Xiaoqing, Beesley, Jonathan, kConFab Investigators, Rookus, Matti A., Verhoef, Senno, Tilanus-Linthorst, Madeleine A., Vreeswijk, Maaike P., Asperen, Christi J., Bodmer, Danielle, Van Os, Theo A., Blok, Marinus J., Hogervorst, Frans BL, HEBON, Goldgar, David E., Ausems, Margreet G. E. M., Meijers-Heijboer, Hanne E. J., Buys, Saundra, John, Esther M., Miron, Alexander, Southey, Melissa, Daly, Mary B., BCFR, SWE-BRCA, Harbst, Katja, Borg, Ake, Rantala, Johanna, Barbany-Bustinza, Gisela, Ehrencrona, Hans, Stenmark-Askmalm, Marie, Kaufman, Bella, Laitman, Yael, Milgrom, Roni, Friedman, Eitan, Domchek, Susan M., Nathanson, Katherine L., Rebbeck, Timothy R., Johannsson, Oskar Thor, Couch, Fergus J., Wang, Xianshu, Fredericksen, Zachary, Cuadras, Daniel, Moreno, Víctor, Pientka, Friederike K., Depping, Reinhard, Caldés, Trinidad, Osorio, Ana, Benítez, Javier, Bueren, Juan, Heikkinen, Tuomas, Nevanlinna, Heli, Hamann, Ute, Torres, Diana, Caligo, Maria Adelaide, Godwin, Andrew K., Imyanitov, Evgeny N., Janavicius, Ramunas, GEMO Study Collaborators, Sinilnikova, Olga M., Stoppa-Lyonnet, Dominique, Mazoyer, Sylvie, Verny-Pierre, Carole, Castera, Laurent, De Pauw, Antoine, Bignon, Yves-Jean, Uhrhammer, Nancy, Peyrat, Jean-Philippe, Vennin, Philippe, Ferrer, Sandra Fert, Collonge-Rame, Marie-Agnès, Mortemousque, Isabelle, McGuffog, Lesley, Chenevix-Trench, Georgia, Pereira-Smith, Olivia M., Antoniou, Antonis C., Cerón, Julián, Tominaga, Kaoru, Surrallés, Jordi, and Pujana, Miguel Angel

110. Clinical utility gene card for: Rothmund-Thomson syndrome.

Author

Larizza, Lidia, Roversi, Gaia, and Verloes, Alain

Subjects
*SKIN disease genetics, *GENETIC mutation, *SKIN disease diagnosis, *DIFFERENTIAL diagnosis, *GENE frequency, *TELANGIECTASIA
Abstract

The article discusses the genetic aspects of Rothmund-Thomson syndrome (RTS), providing information on its mutation, diagnosis, and differential diagnostics. It mentions that association of biallelic mutations in the RECQL4 gene with RTS and two recessive disorders. It states that poikiloderma, which include telangiectasi lesions, reticulated areas of depigmentation, and punctate atrophy, is the main diagnostic sign of RTS.

Published
2013
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111. Differential cytogenomics and miRNA signature of the Acute Myeloid Leukaemia Kasumi-1 cell line CD34+38− compartment

Author

Pedranzini, Laura, Mottadelli, Federica, Ronzoni, Simona, Rossella, Franca, Ferracin, Manuela, Magnani, Ivana, Roversi, Gaia, Colapietro, Patrizia, Negrini, Massimo, Pelicci, Pier Giuseppe, and Larizza, Lidia

Subjects
*ACUTE myeloid leukemia, *CYTOGENETICS, *NON-coding RNA, *GENOMICS, *CELL compartmentation, *GENE expression, *KARYOTYPES, *GENETICS
Abstract

Abstract: The t(8;21) Acute Myeloid Leukaemia (AML) Kasumi-1 cell line with N822K KIT mutation, is a model system for leukemogenesis. As AML initiating cells reside in the CD34+CD38− fraction, we addressed the refined cytogenomic characterization and miRNA expression of Kasumi-1 cell line and its FACS-sorted subpopulations focussing on this compartment. By conventional cytogenetics, Spectral-Karyotyping and array-CGH the cytogenomic profile of Kasumi-1 cells evidenced only subtle regions differentially represented in CD34+CD38− cells. Expression profiling by a miRNA platform showed a set of miRNA differentially expressed in paired subpopulations and the signature of miR-584 and miR-182 upregulation in the CD34+CD38− fraction. [ABSTRACT FROM AUTHOR]

Published
2010
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112. Familiar unbalanced complex rearrangements involving 13 p-arm: description of two cases.

Author

Conconi D, Villa N, Redaelli S, Sala E, Crosti F, Maitz S, Rigoldi M, Parini R, Dalprà L, Lavitrano M, and Roversi G

Abstract

Background: Copy number variations (CNVs) are largely known today, but their position is rarely established by fluorescence in situ hybridization (FISH) or karyotype analysis., Case Presentation: We described two families with copy number gain in which FISH analysis with the specific subtelomeric probe of chromosome 4q and 7q evidenced a third signal at band 13p11.2. Genomic study by array comparative genomic hybridization defined the triple dose segment. In the first case, the duplicate tract is free of known genes, in the second one it contained three expressed genes., Conclusions: The CNV localization on the short arm of an acrocentric chromosome could explain the lack of phenotypic effect, being known the regulatory role of heterochromatin in the position-effect silencing. Furthermore, we would like to underline the importance of using complementary techniques such as FISH and array-CGH to obtain a better definition of genomic rearrangements., Competing Interests: Not applicable.Written informed consent was obtained from the patient’s parents for publication of this case report and any accompanying images.The authors declare that they have no competing interests.Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Published
2018
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113. Associations of common breast cancer susceptibility alleles with risk of breast cancer subtypes in BRCA1 and BRCA2 mutation carriers.

Author

Kuchenbaecker KB, Neuhausen SL, Robson M, Barrowdale D, McGuffog L, Mulligan AM, Andrulis IL, Spurdle AB, Schmidt MK, Schmutzler RK, Engel C, Wappenschmidt B, Nevanlinna H, Thomassen M, Southey M, Radice P, Ramus SJ, Domchek SM, Nathanson KL, Lee A, Healey S, Nussbaum RL, Rebbeck TR, Arun BK, James P, Karlan BY, Lester J, Cass I, Terry MB, Daly MB, Goldgar DE, Buys SS, Janavicius R, Tihomirova L, Tung N, Dorfling CM, van Rensburg EJ, Steele L, v O Hansen T, Ejlertsen B, Gerdes AM, Nielsen FC, Dennis J, Cunningham J, Hart S, Slager S, Osorio A, Benitez J, Duran M, Weitzel JN, Tafur I, Hander M, Peterlongo P, Manoukian S, Peissel B, Roversi G, Scuvera G, Bonanni B, Mariani P, Volorio S, Dolcetti R, Varesco L, Papi L, Tibiletti MG, Giannini G, Fostira F, Konstantopoulou I, Garber J, Hamann U, Donaldson A, Brewer C, Foo C, Evans DG, Frost D, Eccles D, Douglas F, Brady A, Cook J, Tischkowitz M, Adlard J, Barwell J, Ong KR, Walker L, Izatt L, Side LE, Kennedy MJ, Rogers MT, Porteous ME, Morrison PJ, Platte R, Eeles R, Davidson R, Hodgson S, Ellis S, Godwin AK, Rhiem K, Meindl A, Ditsch N, Arnold N, Plendl H, Niederacher D, Sutter C, Steinemann D, Bogdanova-Markov N, Kast K, Varon-Mateeva R, Wang-Gohrke S, Gehrig A, Markiefka B, Buecher B, Lefol C, Stoppa-Lyonnet D, Rouleau E, Prieur F, Damiola F, Barjhoux L, Faivre L, Longy M, Sevenet N, Sinilnikova OM, Mazoyer S, Bonadona V, Caux-Moncoutier V, Isaacs C, Van Maerken T, Claes K, Piedmonte M, Andrews L, Hays J, Rodriguez GC, Caldes T, de la Hoya M, Khan S, Hogervorst FB, Aalfs CM, de Lange JL, Meijers-Heijboer HE, van der Hout AH, Wijnen JT, van Roozendaal KE, Mensenkamp AR, van den Ouweland AM, van Deurzen CH, van der Luijt RB, Olah E, Diez O, Lazaro C, Blanco I, Teulé A, Menendez M, Jakubowska A, Lubinski J, Cybulski C, Gronwald J, Jaworska-Bieniek K, Durda K, Arason A, Maugard C, Soucy P, Montagna M, Agata S, Teixeira MR, Olswold C, Lindor N, Pankratz VS, Hallberg E, Wang X, Szabo CI, Vijai J, Jacobs L, Corines M, Lincoln A, Berger A, Fink-Retter A, Singer CF, Rappaport C, Kaulich DG, Pfeiler G, Tea MK, Phelan CM, Mai PL, Greene MH, Rennert G, Imyanitov EN, Glendon G, Toland AE, Bojesen A, Pedersen IS, Jensen UB, Caligo MA, Friedman E, Berger R, Laitman Y, Rantala J, Arver B, Loman N, Borg A, Ehrencrona H, Olopade OI, Simard J, Easton DF, Chenevix-Trench G, Offit K, Couch FJ, and Antoniou AC

Subjects
Adult, Aged, Alleles, Breast Neoplasms metabolism, Breast Neoplasms pathology, Carcinoma genetics, Carcinoma metabolism, Carcinoma pathology, Carcinoma, Ductal, Breast metabolism, Carcinoma, Ductal, Breast pathology, Carcinoma, Lobular metabolism, Carcinoma, Lobular pathology, Female, Genetic Predisposition to Disease, Heterozygote, Humans, Middle Aged, Neoplasm Grading, Neoplasm Staging, Receptor, ErbB-2 metabolism, Receptors, Estrogen metabolism, Receptors, Progesterone metabolism, Breast Neoplasms genetics, Carcinoma, Ductal, Breast genetics, Carcinoma, Lobular genetics, Genes, BRCA1, Genes, BRCA2
Abstract

Introduction: More than 70 common alleles are known to be involved in breast cancer (BC) susceptibility, and several exhibit significant heterogeneity in their associations with different BC subtypes. Although there are differences in the association patterns between BRCA1 and BRCA2 mutation carriers and the general population for several loci, no study has comprehensively evaluated the associations of all known BC susceptibility alleles with risk of BC subtypes in BRCA1 and BRCA2 carriers., Methods: We used data from 15,252 BRCA1 and 8,211 BRCA2 carriers to analyze the associations between approximately 200,000 genetic variants on the iCOGS array and risk of BC subtypes defined by estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2) and triple-negative- (TN) status; morphologic subtypes; histological grade; and nodal involvement., Results: The estimated BC hazard ratios (HRs) for the 74 known BC alleles in BRCA1 carriers exhibited moderate correlations with the corresponding odds ratios from the general population. However, their associations with ER-positive BC in BRCA1 carriers were more consistent with the ER-positive associations in the general population (intraclass correlation (ICC) = 0.61, 95% confidence interval (CI): 0.45 to 0.74), and the same was true when considering ER-negative associations in both groups (ICC = 0.59, 95% CI: 0.42 to 0.72). Similarly, there was strong correlation between the ER-positive associations for BRCA1 and BRCA2 carriers (ICC = 0.67, 95% CI: 0.52 to 0.78), whereas ER-positive associations in any one of the groups were generally inconsistent with ER-negative associations in any of the others. After stratifying by ER status in mutation carriers, additional significant associations were observed. Several previously unreported variants exhibited associations at P <10(-6) in the analyses by PR status, HER2 status, TN phenotype, morphologic subtypes, histological grade and nodal involvement., Conclusions: Differences in associations of common BC susceptibility alleles between BRCA1 and BRCA2 carriers and the general population are explained to a large extent by differences in the prevalence of ER-positive and ER-negative tumors. Estimates of the risks associated with these variants based on population-based studies are likely to be applicable to mutation carriers after taking ER status into account, which has implications for risk prediction.

Published
2014
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114. Identification of two novel RECQL4exonic SNPs and genomic characterization of the IVS12 minisatellite.

Author

Roversi G, Beghini A, Zambruno G, Paradisi M, and Larizza L

Subjects
Alleles, Enhancer Elements, Genetic, Exons genetics, Humans, RecQ Helicases, Rothmund-Thomson Syndrome genetics, Adenosine Triphosphatases genetics, DNA Helicases genetics, Minisatellite Repeats genetics, Polymorphism, Single Nucleotide
Abstract

Rothmund-Thomson syndrome is a rare autosomal recessive disorder characterized by a widely heterogeneous clinical presentation. Only a subset of clinically diagnosed patients carry RECQL4 gene mutations, probably because of their genetic heterogeneity and/or the complexity of molecular testing. We here describe the polymorphic sites of the RECQL4 gene that detail its genomic structure and may be of interest as modulators of the splicing process and gene expression. We characterized two novel and one already described single-nucleotide polymorphism in the coding region of the RECQL4 gene, which were shown by the exonic splicing enhancer (ESE) score matrix to fall into high-score motifs recognized by serine/arginine-rich proteins. We also describe the genomic structure of a G-C rich minisatellite flanking the 3' splice site of IVS12 in the helicase domain of the RECQL4 gene, which may enhance mutations such as those described at the IVS12 acceptor site. RECQL4 polymorphic sites may be useful for identifying alleles associated with missplicing and, more generally, in cancer-susceptibility association studies.

Published
2003
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