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Ayala FRR, Martin JW, Bertuzzo CS. Replication Timing Aberration of KIF14 and MDM4 / PI3KC 2 β Alleles and Aneuploidy as Markers of Chromosomal Instability and Poor Treatment Response in Ewing Family Tumor Patients. Glob Med Genet 2023; 10:54-62. [PMID: 37091312 PMCID: PMC10121373 DOI: 10.1055/s-0043-1768238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
Replication timing of allelic gene pairs is strictly regulated according to expression, genome stability, and epigenetic changes, and tumorigenesis may be associated with changes in the allelic replication in various tumors. Our aim was to determine whether such alterations had a prognostic value in Ewing's family tumor (EFT) patients. The KIF14 and MDM4 / PI3KC 2β and the centromeric satellite sequence of chromosomes 8 and 12 were used for replication timing assessments. Aneuploidy was assessed by enumerating the copy numbers of chromosomes 8 and 12. Replication timing and aneuploidy were detected cytogenetically using multicolors fluorescence in situ hybridization assay applied in 135 EFT. Patients with trisomy 8 presented an association with an asynchronous replication pattern (SD) of MDM4 / PI3KC 2β genes ( p = 0.013). Trisomy 12 was associated with a synchronous pattern (DD) of KIF14 probe signals ( p = 0.04). The DD synchronous replication pattern of KIF14 showed a correlation with age ( p < 0.0001), and the SS synchronous replication pattern of the same locus showed a correlation with lung metastatic ( p = 0.012). The subgroup of patients presenting with multiplet signals of MDM4 / PI3KC 2β showed an association with treatment response ( p = 0.045) and age ( p = 0.033). Replication pattern of KIF14 may, significantly, be associated with chromosomal instability as MDM4 / PI3KC 2β may be a considerably new marker of poor treatment response in EFT patients.
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Affiliation(s)
- Fernanda Rocha Rojas Ayala
- Department of Medical Genetics, Unicamp University, Oncogenetics Service at Clinics Hospital, Campinas, SP, Brazil
- Address for correspondence Fernanda Rocha Rojas Ayala, MD, PhD Department of Medical Genetics, Unicamp University, Oncogenetics Service at Clinics HospitalCampinas, SP 13083-888Brazil
| | | | - Carmen Silvia Bertuzzo
- Department of Genetics and Genomics, at Unicamp University, Oncogenetics Services at Clinics Hospital, Campinas, SP, Brazil
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Domaradzka J, Deperas M, Obersztyn E, Kucińska-Chahwan A, Brison N, Van Den Bogaert K, Roszkowski T, Kędzior M, Bartnik-Głaska M, Łuszczek A, Jakubów-Durska K, Vermeesch JR, Nowakowska BA. A placental trisomy 2 detected by NIPT evolved in a fetal small Supernumerary Marker Chromosome (sSMC). Mol Cytogenet 2021; 14:18. [PMID: 33722255 PMCID: PMC7962352 DOI: 10.1186/s13039-021-00535-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 02/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Non-invasive prenatal testing (NIPT) is a rapidly developing and widely used method in the prenatal screening. Recently, the widespread use of the NIPT caused a neglecting of the limitations of this technology. CASE PRESENTATION The 38-year-old woman underwent amniocentesis because of a high risk of trisomy 2 revealed by the genome-wide Non-Invasive Prenatal Test (NIPT). The invasive prenatal diagnosis revealed the mosaicism for a small supernumerary marker chromosome sSMC derived from chromosome 2. Interphase fluorescence in situ hybridization (FISH) on uncultured amniocytes revealed three signals of centromere 2 in 30% of the cells. GTG-banded metaphases revealed abnormal karyotype (47,XX,+mar[21]/46,XX[19]) and was confirmed by array comparative genomic hybridization (aCGH). Cytogenetic analyses (FISH, aCGH, karyotype) on fetal skin biopsies were performed and confirmed the genomic gain of the centromeric region of chromosome 2. In the placenta, three cell lines were detected: a normal cell line, a cell line with trisomy 2 and a third one with only the sSMC. CONCLUSION Whole-genome Non-Invasive Prenatal Testing allows not only the identification of common fetal trisomies but also diagnosis of rare chromosomal abnormalities. Especially in such cases, it is extremely important to perform not only NIPT verification on a sample of material other than trophoblast, but also to apply appropriate research methods. Such conduct allows detailed analysis of the detected aberration, thus appropriate clinical validity.
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Affiliation(s)
- Justyna Domaradzka
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland.
| | - Marta Deperas
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland
| | - Ewa Obersztyn
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland
| | - Anna Kucińska-Chahwan
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Czerniakowska 231, 00-416, Warsaw, Poland
| | - Nathalie Brison
- Centre for Human Genetics, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | | | - Tomasz Roszkowski
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Czerniakowska 231, 00-416, Warsaw, Poland
| | - Marta Kędzior
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland
| | - Magdalena Bartnik-Głaska
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland
| | - Alicja Łuszczek
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland
| | - Krystyna Jakubów-Durska
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland
| | | | - Beata Anna Nowakowska
- Medical Genetics Department, The Institute of Mother and Child, Kasprzaka 17A, 01-211, Warsaw, Poland
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3
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Sturiale A, Giudici F, Alemanno G, Cavalli T, Addasi R, Santomaggio C, Meoni G, Brandi ML, Tonelli F. Massive intrathoracic lipoma in men1 syndrome. Int J Surg Case Rep 2014; 6C:247-50. [PMID: 25545711 PMCID: PMC4337913 DOI: 10.1016/j.ijscr.2014.10.071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 10/17/2014] [Accepted: 10/18/2014] [Indexed: 11/22/2022] Open
Abstract
Introduction The multiple endocrine neoplasia type 1 (MEN1) is a rare autosomal dominant syndrome characterized by the onset of hyperparathyroidism, gastroenteropancreatic neuroendocrine tumors and pituitary lesions. Presentation of case This appears to be the first described case of a massive intrathoracic lipoma in MEN1. The patient was affected with primary hyperparathyroidism treated with a total parathyroidectomy followed by a distal pancreatectomy for insulinoma. At follow-up, the computed tomography showed a massive lesion on the left emithorax suggestive of a lipoma. At the onset of a mild dyspnea we decided to perform the surgical excision of the mass obtaining a complete relief of the symptoms. Discussion This case is evidence of the importance of a strict follow-up of such patients. Conclusion Lipomas are the most frequent benign soft tissue tumors. They are usually sporadic but are sometimes related to hereditary syndromes. Intrathoracic localizations are rare and can arise mainly in the mediastinum, bronchus or lung. The diagnosis is often incidental; despite preoperative imaging will accurately show the features of the lesions, it is impossible obtain an accurate diagnosis-hence, the treatment of choice remains the surgical excision.
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Affiliation(s)
- Alessandro Sturiale
- Digestive Surgery Unit, Department of Surgery and Translational Medicine, University of Florence Medical School, Careggi University Hospital, Florence, Italy.
| | - Francesco Giudici
- Digestive Surgery Unit, Department of Surgery and Translational Medicine, University of Florence Medical School, Careggi University Hospital, Florence, Italy
| | - Giovanni Alemanno
- Digestive Surgery Unit, Department of Surgery and Translational Medicine, University of Florence Medical School, Careggi University Hospital, Florence, Italy
| | - Tiziana Cavalli
- Digestive Surgery Unit, Department of Surgery and Translational Medicine, University of Florence Medical School, Careggi University Hospital, Florence, Italy
| | - Rami Addasi
- Digestive Surgery Unit, Department of Surgery and Translational Medicine, University of Florence Medical School, Careggi University Hospital, Florence, Italy
| | - Carmine Santomaggio
- Department of Pneumology, University of Florence Medical School, Careggi University Hospital, Florence, Italy
| | - Giulia Meoni
- Department of Oncology, Medical Oncology 1, Careggi University Hospital, Florence, Italy
| | - Maria Luisa Brandi
- Regional Centre for Hereditary Endocrine Tumors, Unit of Metabolic Bone Diseases, Department of Internal Medicine, University of Florence, Florence, Italy
| | - Francesco Tonelli
- Digestive Surgery Unit, Department of Surgery and Translational Medicine, University of Florence Medical School, Careggi University Hospital, Florence, Italy
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4
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Uwale Eyesan S, Christopher Ayeni S, Adesope Adesina S, Tolulope Kehinde G, Olawepo A, Kazeem Ibrahim O. Angiofibrolipoma of the calf. Rare Tumors 2013; 5:e48. [PMID: 24179660 PMCID: PMC3804823 DOI: 10.4081/rt.2013.e48] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 07/30/2013] [Accepted: 07/31/2013] [Indexed: 11/23/2022] Open
Abstract
Angiofibrolipoma is a neoplasm composed of fibrocytes, capillaries and matured adipose tissues. It is a rare histopathologic variant of lipoma, characterized by matured adipocytes, blood vessels and dense collagenous tissues. It is an extremely rare tumor with very few cases reported in the literature. We are reporting a 9-year-old boy who presented with a right calf swelling noticed since birth, slowly increasing in size which became painful about a year prior to presentation (at about the age of 8 years). The mass extended from the popliteal fossa to the junction of the gastro-soleus. Mid calf circumference on the right was 44 cm and 24 cm on the left. Clinically there was no foot drop. He had neither preceding trauma nor fall. He had no systemic symptom. Pre-operative plain radiographs, incisional biopsy and other ancillary investigations were done. Histopathology result after excisional biopsy revealed angiofibrolipoma and postoperative clinical improvement was significant. To our knowledge, such a case has not been previously reported in the literature.
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Affiliation(s)
- Samuel Uwale Eyesan
- Department of Orthopaedic Surgery, Bowen University Teaching Hospital , Ogbomoso
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5
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Shah VS, Harish M, Patel JR, Shah N. Infiltrating angiolipoma of the cheek. BMJ Case Rep 2013; 2013:bcr-2013-200041. [PMID: 24014331 DOI: 10.1136/bcr-2013-200041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Angiolipoma, spindle cell lipoma, myelolipoma, chondrolipoma and myxolipoma are histological variants of lipomas arising from fat tissue. Although angiolipoma is the most common tumour in the trunk and forearm, it occurs infrequently in the head and neck region. In this report we present a case of angiolipoma occurring in the buccal mucosa of a 33-year-old man. The patient had noticed a painless mass in his buccal mucosa for 2 months. The surgically removed tumour, measuring 4 × 4 cm in diameter was histologically evaluated. The tumour was composed of proliferations of mature fat cells and connective tissue containing many small blood vessels, which were evenly distributed.
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Affiliation(s)
- Vandana S Shah
- Department of Oral & Maxillofacial Pathology, K.M. Shah Dental College & Hospital, Sumandeep Vidyapeeth, Vadodara, Gujarat, India
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6
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Bianchini L, Saâda E, Gjernes E, Marty M, Haudebourg J, Birtwisle-Peyrottes I, Keslair F, Chignon-Sicard B, Chamorey E, Pedeutour F. Let-7 MicroRNA and HMGA2 levels of expression are not inversely linked in adipocytic tumors: Analysis of 56 lipomas and liposarcomas with molecular cytogenetic data. Genes Chromosomes Cancer 2011; 50:442-55. [DOI: 10.1002/gcc.20869] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Accepted: 02/09/2011] [Indexed: 12/16/2022] Open
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Abou Youssif T, Fahmy MA, Koumakpayi IH, Ayala F, Al Marzooqi S, Chen G, Tamboli P, Squire J, Tanguay S, Sircar K. The mammalian target of rapamycin pathway is widely activated without PTEN deletion in renal cell carcinoma metastases. Cancer 2010; 117:290-300. [PMID: 20830770 DOI: 10.1002/cncr.25402] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Revised: 02/19/2010] [Accepted: 03/23/2010] [Indexed: 11/10/2022]
Abstract
BACKGROUND Inhibitors of the mammalian target of rapamycin (mTOR) are emerging as promising therapies for metastatic renal cell carcinoma (RCC). Because rational treatment strategies require understanding the activation status of the underlying signaling pathway being targeted at the desired stage of disease, the authors examined the activation status of different components of the mTOR pathway in RCC metastases and matched primary tumors. METHODS The authors immunostained metastatic RCC samples from 132 patients and a subset of 25 matched primary RCCs with antibodies against phosphatidylinositol 3'-kinase, PTEN, phospho-Akt, phospho-mTOR, and p70S6. PTEN genomic status was assessed by fluorescent in situ hybridization. Marker expression was correlated to clinicopathologic variables and to survival. RESULTS The mTOR pathway showed widespread activation in RCC metastases of various sites with strong correlation between different components of this signaling cascade (P<.0001), but without significant PTEN genomic deletion. Only cytoplasmic phospho-mTOR showed independent prognostic significance (P = .029) and fidelity between primary RCCs and their matched metastases (P = .004). CONCLUSIONS Activation of various components of the mTOR signaling pathway in metastatic RCC lesions across various tumor histologies, nuclear grades, and metastatic sites suggests the potential for vertical blockade of multiple steps of this pathway. Patient selection may be improved by mTOR immunostaining of primary RCC.
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Affiliation(s)
- Tamer Abou Youssif
- Department of Urology, McGill University Health Center, Montreal, Quebec, Canada
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8
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Brkić A, Ozçamur C, Gürkan-Köseoğlu B, Olgac V. Angiofibrolipoma of the buccal mucosa: a case report. J Oral Sci 2010; 52:173-6. [PMID: 20339251 DOI: 10.2334/josnusd.52.173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Angiofibrolipoma is a rare histopathological variant of lipoma, characterized by mature adipocytes, blood vessels and dense collagenous tissue. It is seldom seen in the oral and maxillofacial region. Clinically, as it shares macroscopic similarity with lipoma and fibroma, the diagnosis of angiofibrolipoma is only possible based on its histopathological features. The aim of this report is to present an unusual case of a 59-year-old female patient, who reported a pathological soft mass in the buccal mucosa of the left cheek which was present for 20 years. After excisional biopsy and histopathological evaluation of the sample, the diagnosis of angiofibrolipoma was made.
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Affiliation(s)
- Amila Brkić
- Department of Oral Surgery, Faculty of Dentistry, Istanbul University, Capa, Turkey.
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9
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Selvarajah S, Yoshimoto M, Maire G, Paderova J, Bayani J, Squire JA, Zielenska M. Identification of cryptic microaberrations in osteosarcoma by high-definition oligonucleotide array comparative genomic hybridization. ACTA ACUST UNITED AC 2007; 179:52-61. [DOI: 10.1016/j.cancergencyto.2007.08.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Accepted: 08/02/2007] [Indexed: 12/24/2022]
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10
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Yoshimoto M, Cunha IW, Coudry RA, Fonseca FP, Torres CH, Soares FA, Squire JA. FISH analysis of 107 prostate cancers shows that PTEN genomic deletion is associated with poor clinical outcome. Br J Cancer 2007; 97:678-85. [PMID: 17700571 PMCID: PMC2360375 DOI: 10.1038/sj.bjc.6603924] [Citation(s) in RCA: 218] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
This study examines the clinical impact of PTEN genomic deletions using fluorescence in situ hybridisation (FISH) analysis of 107 prostate cancers, with follow-up information covering a period of up to 10 years. Tissue microarray analysis using interphase FISH indicated that hemizygous PTEN losses were present in 42/107 (39%) of prostatic adenocarcinomas, with a homozygous PTEN deletion observed in 5/107 (5%) tumours. FISH analysis using closely linked probes centromeric and telomeric to the PTEN indicated that subband microdeletions accounted for ∼70% genomic losses. Kaplan–Meier survival analysis of PTEN genomic losses (hemizygous and homozygous deletion vs not deleted) identified subgroups with different prognosis based on their time to biochemical relapse after surgery, and demonstrated significant association between PTEN deletion and an earlier onset of disease recurrence (as determined by prostate-specific antigen levels). Homozygous PTEN deletion was associated with a much earlier onset of biochemical recurrence (P=0.002). Furthermore, PTEN loss at the time of prostatectomy correlated with clinical parameters of more advanced disease, such as extraprostatic extension and seminal vesicle invasion. Collectively, our data indicates that haploinsufficiency or PTEN genomic loss is an indicator of more advanced disease at surgery, and is predictive of a shorter time to biochemical recurrence of disease.
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Affiliation(s)
- M Yoshimoto
- Division of Applied Molecular Oncology, Ontario Cancer Institute, Princess Margaret Hospital, Toronto, Ontario, M5G 2M9, Canada
| | - I W Cunha
- Departamento de Patologia, Centro de Tratamento e Pesquisa, Hospital do Câncer, A.C. Camargo, São Paulo, 01509 010, Brazil
| | - R A Coudry
- Departamento de Patologia, Centro de Tratamento e Pesquisa, Hospital do Câncer, A.C. Camargo, São Paulo, 01509 010, Brazil
| | - F P Fonseca
- Serviço de Urologia, Departamento de Cirurgia Pélvica, Hospital do Câncer, A.C. Camargo, São Paulo, 01509 010, Brazil
| | - C H Torres
- Instituto de Matemática e Estatística, Universidade de São Paulo, São Paulo, 01509 010, Brazil
| | - F A Soares
- Departamento de Patologia, Centro de Tratamento e Pesquisa, Hospital do Câncer, A.C. Camargo, São Paulo, 01509 010, Brazil
| | - J A Squire
- Division of Applied Molecular Oncology, Ontario Cancer Institute, Princess Margaret Hospital, Toronto, Ontario, M5G 2M9, Canada
- Department of Medical Biophysics, Faculty of Medicine, University of Toronto, M5G 2M9, Canada
- Division of Applied Molecular Oncology, Ontario Cancer Institute, Princess Margaret Hospital. 610 University Avenue, Room 9-721, Toronto, Ontario, M5G 2M9, Canada. E-mail:
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Italiano A, Cardot N, Dupré F, Monticelli I, Keslair F, Piche M, Mainguené C, Coindre JM, Pedeutour F. Gains and complex rearrangements of the 12q13-15 chromosomal region in ordinary lipomas: the "missing link" between lipomas and liposarcomas? Int J Cancer 2007; 121:308-15. [PMID: 17372913 DOI: 10.1002/ijc.22685] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Well-differentiated liposarcomas (WDLPS) classically contain high-level amplification of 12q14-15 sequences, including the MDM2 and CDK4 genes, while lipomas are characterized by simple structural chromosome aberrations often involving HMGA2 at 12q15. Previous studies have shown that low-level gain of the 12q14-15 region, such as trisomy 12 and 12q15-24 duplication, might be sufficient for the development of minimal atypia and formation of WDLPS. Moreover, because some features, such as overexpression of HMGA2, are shared by both lipomas and WDLPS, it has been hypothesized that lipomas and WDLPS may form a genetic and morphological continuum. We report here the results of molecular cytogenetic analysis of 8 lipomas that had unusual chromosomal features resulting in gains of 12q14-15. While 3 cases had simple numerical rearrangements (trisomy 12) or structural rearrangements (unbalanced translocations with 12q gains), 5 cases were particularly intriguing because of peculiar features such as giant chromosomes, supernumerary chromosomes or neocentromeres that usually are the hallmark of WDLPS. Gain of 12q14-15 sequences including extra copies of MDM2 and CDK4 were detected by fluorescence in situ hybridization analysis in all analyzed cases but no expression of MDM2 and CDK4 was observed suggesting that these genomic imbalances had no functional consequence. We observed rearrangements of HMGA2 in 5 out 8 cases. Altogether, our results indicate that moderate gains of 12q are not always associated with a malignant phenotype, and that some intermediary forms exist between classical lipomas and classical WDLPS. Some of these intermediary forms may correspond to a genomic premalignant condition while some may have no malignant potential.
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Affiliation(s)
- Antoine Italiano
- Faculty of Medicine, Laboratory of Solid Tumors Genetics, Nice University Hospital and CNRS UMR 6543, Nice, France
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12
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Italiano A, Attias R, Aurias A, Pérot G, Burel-Vandenbos F, Otto J, Venissac N, Pedeutour F. Molecular cytogenetic characterization of a metastatic lung sarcomatoid carcinoma: 9p23 neocentromere and 9p23∼p24 amplification including JAK2 and JMJD2C. ACTA ACUST UNITED AC 2006; 167:122-30. [PMID: 16737911 DOI: 10.1016/j.cancergencyto.2006.01.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2005] [Revised: 01/10/2006] [Accepted: 01/18/2006] [Indexed: 12/16/2022]
Abstract
Sarcomatoid carcinoma of the lung (LSC) is a rare lung cancer characterized by an admixture of carcinoma and sarcoma components. Data concerning the genomic alterations of LSC are almost nonexistent. Here, we report on the first molecular cytogenetic characterization of a metastatic LSC. Cytogenetic and multicolor fluorescence in situ hybridization (M-FISH) analyses showed a near-triploid karyotype with numerous structural aberrations and four to six small supernumerary marker chromosomes containing chromosome 9 sequences. Comparative genomic hybridization on arrays (array CGH) detected an amplification of 9p23 approximately p24.3 and gains of 1q11 approximately q23.3, 3q26.2 approximately q29, and 17q23.2 approximately q24.1. The 9p amplification was also detected in the primary tumor and another metastasis of the same patient, indicating it was a significant element in the pathogenesis of this LSC case. Complementary FISH analysis showed that the small supernumerary chromosomes were isochromosomes for 9p23 approximately p24.3. These isochromosomes were lacking alpha-satellite sequences although they were still stable after 55 passages in culture. As demonstrated by immunostaining with anti-centromere antibodies, they contained a functional centromere. So-called analphoid "neocentromeres" are rare and have been mainly described in constitutional abnormal karyotypes. This case is the third description of the identification of neocentromeres in cancer, (i.e. well-differentiated liposarcoma and acute myeloid leukemia), and is the first one in a carcinoma. Our results suggest that the 9p23 neocentromere of this case of LSC might be similar to a 9p23 neocentromere previously identified in two constitutional cases. The frequency of neocentromere formation in solid tumors may indeed be underestimated and may have a significant implication in chromosomal instability in tumor cells.
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Affiliation(s)
- Antoine Italiano
- Laboratory of Solid Tumors Genetics, Centre Hospitalier Universitaire de Nice and CNRS UMR 6543, Faculté de Medecine, 28 avenue de Valombrose, 06107 Nice, France
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13
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Nilsson M, Mertens F, Höglund M, Mandahl N, Panagopoulos I. Truncation and fusion of HMGA2 in lipomas with rearrangements of 5q32-->q33 and 12q14-->q15. Cytogenet Genome Res 2006; 112:60-6. [PMID: 16276091 DOI: 10.1159/000087514] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Accepted: 03/22/2005] [Indexed: 11/19/2022] Open
Abstract
Chromosome segment 12q13-->q15 recombines with many different chromosome bands in lipomas and at least ten recurrent translocations have been identified. The HMGA2 gene is often rearranged, but little is known about the molecular consequences at other breakpoints. Fusion genes between HMGA2 (12q14-->q15) and LPP (3q27-->q28), LHFP (13q12) and CMKOR1 (2q37) have been reported. In the present study, eight lipomas with rearrangements involving chromosome bands 12q14-->q15 and 5q32-->q33 were analyzed. In chromosome 5, five of the cases had a breakpoint in the 5' part of EBF in 5q33, while three cases had breakpoints located about 200 kb 3' of EBF. In chromosome 12, the breakpoints clustered to the region of HMGA2. Four cases had breaks within the gene and four had breaks 5' to HMGA2 where the gene BC058822 is located. Two versions of an HMGA2/EBF fusion transcript were detected in one case; one transcript was in frame and the other out of frame. Identical EBF/BC058822 fusion transcripts, seen in two cases, one of which also had the HMGA2/EBF transcript, were out of frame and resulted in truncation of EBF. Since EBF and HMGA2 have different orientations, the findings must be explained by complex aberrations including multiple breaks. The combined data indicate that the pathogenetically significant event is fusion, truncation or transcriptional activation of HMGA2, but it can not be excluded that EBF, which has been implicated in adipogenesis, contributes to the tumor development.
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Affiliation(s)
- M Nilsson
- Department of Clinical Genetics, University Hospital, Lund, Sweden
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14
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Vougiouklakis T, Mitselou A, Agnantis NJ. Giant lipoma: An unusual cause of intrathoracic mass. Pathol Res Pract 2006; 202:47-9. [PMID: 16310971 DOI: 10.1016/j.prp.2005.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2005] [Accepted: 09/01/2005] [Indexed: 11/20/2022]
Abstract
Postmortem examination performed in a 39-year-old woman revealed a well-circumscribed, round, large mass in the right hemithorax. The tumor was attached with its pedicle to the ventral pericardium and adjoined the diaphragm with compression of the right lower lobe of the lung. Histologic examination confirmed the diagnosis of giant lipoma.
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Affiliation(s)
- Theodore Vougiouklakis
- Department of Forensic Pathology, Medical School, University of Ioannina, 45210 Ioannina, Greece.
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15
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Inazu T, Myint Z, Kuroiwa A, Matsuda Y, Noguchi T. Molecular cloning, expression and chromosomal localization of mouse MM-1. Mol Biol Rep 2005; 32:273-9. [PMID: 16328889 DOI: 10.1007/s11033-005-3006-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/02/2005] [Indexed: 10/25/2022]
Abstract
The protooncogene product Myc associates with many proteins. The isolation of the mouse MM-1; c-Myc binding protein (Myc-Modulator 1) cDNA is described. The cDNA contains a 462 bp open reading frame that encodes a polypeptide of 154 amino acid residues. The deduced amino acid sequence indicates that mouse MM-1 has a 99% identity with the sequence of human MM-1. The expression of mouse MM-1 mRNA was detected in the fetal liver, but its level was 3-fold higher than that in the normal adult liver, and was slightly increased after a partial hepatectomy. It is expressed widely in a variety of adult mouse tissues. Thus, MM-1 may play a role in liver development and growth. A bioinformatics analysis indicates that mouse MM-1 gene consists of 6 exons. Furthermore, the chromosomal location of the mouse MM-1 gene was on the F2-F3 band of chromosome 15, as determined by fluorescence in situ hybridization.
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Affiliation(s)
- Tetsuya Inazu
- Department of Biochemistry, Fukui Medical University, Matsuoka, Fukui 910-1193, Japan.
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16
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Patel HS, Kantarjian HM, Bueso-Ramos CE, Medeiros LJ, Haidar MA. Frequent deletions at 12q14.3 chromosomal locus in adult acute lymphoblastic leukemia. Genes Chromosomes Cancer 2005; 42:87-94. [PMID: 15495192 DOI: 10.1002/gcc.20116] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Cytogenetic abnormalities at the 12q12-q14 chromosomal locus are rarely detected in acute lymphoblastic leukemia (ALL). To examine submicroscopic deletions at this locus, we analyzed 78 adult precursor B- and T-cell ALL cases [27 with Philadelphia chromosome (Ph)-negative B-cell ALL, 20 with Ph-negative B-cell ALL with expression of one or two myeloid markers, 18 with Ph-positive B-cell ALL, and 13 with T-cell ALL] using a panel of 13 microsatellite (MST) markers that span the 12q12-q14.3 region. The status of MST markers was evaluated by use of polymerase chain reaction performed with fluorescence-labeled primers and automated fragment analysis. The MST marker analyses showed submicroscopic deletions at the 12q14.3 locus in 20 of the 78 ALL cases (26%). The frequency of deletions was highest in Ph-negative B-cell ALL (13 of 27, 48%) compared with that in Ph-negative B-cell ALL with expression of myeloid markers (4 of 20, 20%), Ph-positive B-cell ALL (2 of 18, 11%), and T-cell ALL (1 of 13, 8%). Deletion frequencies of MST markers along the 12q12-q14.3 locus suggest that the targeted gene of deletion is located within a 170-kb region bordered by the markers D12S1504 (approximately 65 kb upstream of HMGA2) and D12S1509 (in intron 3 of HMGA2) at the 12q14.3 locus. These submicroscopic deletions at the 12q14.3 locus may play a role in the pathogenesis of ALL, particularly in Ph-negative precursor B-cell ALL.
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Affiliation(s)
- Hemantkumar S Patel
- Department of Hematopathology, Division of Pathology and Laboratory Medicine, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA
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Sandberg AA. Updates on the cytogenetics and molecular genetics of bone and soft tissue tumors: lipoma. ACTA ACUST UNITED AC 2004; 150:93-115. [PMID: 15066317 DOI: 10.1016/j.cancergencyto.2003.12.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2003] [Revised: 12/22/2003] [Accepted: 12/24/2003] [Indexed: 02/02/2023]
Affiliation(s)
- Avery A Sandberg
- Department of DNA Diagnostics, St. Joseph's Hospital and Medical Center, 350 West Thomas Road, Phoenix, AZ 85013, USA.
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18
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Dal Cin P, Thomas A, Weremowicz S. An intragenic rearrangement of HMGA2 is not necessary for lipoma formation. ACTA ACUST UNITED AC 2004; 149:178-9. [PMID: 15036898 DOI: 10.1016/j.cancergencyto.2003.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Maire G, Forus A, Foa C, Bjerkehagen B, Mainguené C, Kresse SH, Myklebost O, Pedeutour F. 11q13 alterations in two cases of hibernoma: large heterozygous deletions and rearrangement breakpoints near GARP in 11q13.5. Genes Chromosomes Cancer 2003; 37:389-95. [PMID: 12800150 DOI: 10.1002/gcc.10223] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Hibernomas are rare, benign tumors with a histological appearance resembling that of brown adipose tissue. The diagnosis of hibernomas may be difficult because some of them contain only a small number of the characteristic multivacuolated fat cells and can be mistakenly classified as well-differentiated liposarcomas. Cytogenetic information has been reported for 10 cases, showing that these tumors are characterized by structural rearrangements involving 11q13. Previous fluorescence in situ hybridization (FISH) studies revealed consistent and sometimes cryptic losses of the MEN1 region in 11q13.1. Here, we describe the molecular cytogenetic analysis of two new hibernoma cases. Both tumors showed complex rearrangements, simultaneously including translocations, inversions, and deletions affecting the pair of chromosomes 11. The translocation partners were chromosome 5 in one case and chromosomes 16 and 22 in the other case. The 11q13 region was concomitantly rearranged on both chromosomes 11. FISH studies revealed large heterozygous deletions within the 11q13 band, from 11q13.1 to 11q13.5. Genes such as PYGM, MEN1, CCND1, FGF3, ARIX, and GARP were deleted, showing that the size of the 11q13 altered region was larger than previously reported. Furthermore, both tumors had breakpoints in 11q13.5, one of them in the immediate proximity of the GARP gene. Our results suggest that rearrangements of GARP or a neighboring gene may be important for the pathogenesis of hibernomas.
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Affiliation(s)
- Georges Maire
- Laboratoire de Génétique, Centre Hospitalier Universitaire de Nice, Université de Nice-Sophia Antipolis, France.
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Foa C, Mainguené C, Dupré F, Coindre JM, Huguet C, Kober C, Pedeutour F. Rearrangement involving chromosomes 1 and 8 in a retroperitoneal lipoma. CANCER GENETICS AND CYTOGENETICS 2002; 133:156-9. [PMID: 11943344 DOI: 10.1016/s0165-4608(01)00573-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Superficial lipomas are very common benign adipose tissue tumors. In contrast, deep-seated lipomas such as retroperitoneal lipomas, are extremely rare and have to be carefully distinguished from well-differentiated liposarcomas for appropriate treatment and follow-up. We report to, our knowledge, the first cytogenetic analysis of a retroperitoneal lipoma occurring in an adult, which showed a complex rearrangement interpreted as t(1;8)(q32;q22-q23) followed by a pericentric inversion of der(8). There was no detectable rearrangement of chromosome 12, and in particular no 12q14-q15 amplification. Because rearrangements of the 8q11-q13 region involving the PLAG1 gene have been described in lipoblastoma-another kind of benign adipose tumor--we used fluorescence in situ hybridization analysis to determine in the present case the chromosomal breakpoint on 8q was located between the ETO (8q22) and COX6C (8q22-q23) genes at a great distance from PLAG1. Karyotypic analysis of additional cases of retroperitoneal lipomas will be required to assess the significance of chromosome 1 and 8 rearrangements in a continuous effort to attain a better classification of adipose tissue tumors. Of great importance is the determination of such genetic markers as additional tools for the differential diagnosis between benign and malignant forms of adipose tumors, and to avoid erroneous diagnoses.
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Affiliation(s)
- Cyril Foa
- UF Recherche Clinique 0952, Laboratoire de Génétique, CHU de Nice, Nice, France
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21
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Broberg K, Tallini G, Höglund M, Lindstrand A, Toksvig-Larsen S, Mertens F. The tumor-associated gene HMGIC is expressed in normal and osteoarthritis-affected synovia. Mod Pathol 2001; 14:311-7. [PMID: 11301347 DOI: 10.1038/modpathol.3880308] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Chromosomal rearrangements involving chromosome bands 12q13-15 are very frequent findings in benign solid tumors, and recently, the primary molecular target for these aberrations was identified as the gene HMGIC. However, mutations in this gene have also been observed in nonneoplastic tissues. In a previous study, we reported breakpoints within HMGIC of synovia affected by osteoarthritis (OA) in two cases with 12q15 aberrations. To analyze further the role of HMGIC in this disease, we have performed cytogenetic, fluorescent in situ hybridization (FISH), RNA, and protein expression analyses on synovial samples from patients with OA and individuals without signs of the disorder. Cytogenetic analysis of short-term cultured cells revealed clonal 12q13-15 aberrations in 2/36 cases of OA synovia and no rearrangement in any of the five controls. With FISH analysis, it was shown that the chromosomal breakpoints in the two aberrant cases were located outside the HMGIC locus. In contrast, at RNA and protein expression analyses, OA-affected as well as normal synovia displayed transcription and translation of the gene. We also analyzed whether immunoreactivity for HMGIC was associated with the proliferation-specific antigen Ki-67, but no correlation between the staining patterns of these proteins was observed. From the results of the present study, it is evident that expression of HMGIC cannot simply be considered a sign of neoplasia or an effect of proliferation.
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Affiliation(s)
- K Broberg
- Department of Clinical Genetics, University Hospital, Lund, Sweden.
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Sirvent N, Forus A, Lescaut W, Burel F, Benzaken S, Chazal M, Bourgeon A, Vermeesch JR, Myklebost O, Turc-Carel C, Ayraud N, Coindre JM, Pedeutour F. Characterization of centromere alterations in liposarcomas. Genes Chromosomes Cancer 2000; 29:117-29. [PMID: 10959091 DOI: 10.1002/1098-2264(2000)9999:9999<::aid-gcc1014>3.0.co;2-q] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Supernumerary ring and large marker chromosomes are a characteristic of atypical lipomas and well-differentiated liposarcomas (ALP-WDLPS) and are composed of amplified 12q14-15 sequences in association with variable segments from other chromosomes. Although stably transmitted, these chromosomes contain centromeric alterations, showing no detectable alpha-satellite sequences. We performed C-banding, fluorescence in situ hybridization, and immunostaining with anti-centromere antibodies in 8 cases of liposarcomas with supernumerary rings and large markers, including 5 ALP-WDLPS and 3 dedifferentiated-LPS and high-grade LPS. Our results with alpha-satellite probes and anti-CENPB antibodies confirm the lack of detectable alpha-satellite sequences in the five ALP-WDLPS supernumerary chromosomes, whereas centromeric activity was proved by the detection of kinetochores by using anti-CENPC antibodies. In contrast, the high grade and dedifferentiated liposarcomas showed a different pattern. In 2 cases, amplified chromosome 12 sequences, including amplification of alpha-satellite 12 sequences in 1 case, were present on chromosomes with typical centromeres. In another case, the rings were similar to WDLPS-ALP rings, but a large marker contained a chromosome 5 centromere and amplified alpha-satellite sequences from chromosome 8. ALP-WDLPS is the first example of a tumor class for which the presence of stable analphoid chromosomes is a constant and specific abnormality. Formation of newly derived centromeres, so-called neocentromeres, could be an original and effective way to maintain a selective advantage in neoplastic cells by conferring stability to the supernumerary chromosomes of ALP-WDLPS. The activation of normally non-centromeric sequences might be obtained by an epigenetic mechanism due to the peculiar chromatin conformation of these highly complex chromosomes.
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Affiliation(s)
- N Sirvent
- UF Recherche Clinique 0952, CHU de Nice, Université de Nice-Sophia Antipolis, France
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23
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Park KC, Choi EJ, Min SW, Chung SS, Kim H, Suzuki T, Tanaka K, Chung CH. Tissue-specificity, functional characterization and subcellular localization of a rat ubiquitin-specific processing protease, UBP109, whose mRNA expression is developmentally regulated. Biochem J 2000; 349:443-53. [PMID: 10880343 PMCID: PMC1221167 DOI: 10.1042/0264-6021:3490443] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A cDNA encoding an ubiquitin-specific processing protease, UBP109, in rat skeletal muscle was cloned and its product was characterized. Northern analysis revealed that UBP109 mRNA is highly expressed in testis and spleen, compared with other tissues. Furthermore, in situ hybridization showed that the level of UBP109 mRNA in liver, spinal cord and brain dramatically changed during embryonic development, indicating that the expression of UBP109 mRNA is developmentally regulated. UBP109 was expressed in Escherichia coli and purified to apparent homogeneity using a (125)I-labelled ubiquitin-peptide fusion as a substrate. The purified enzyme cleaved at the C-terminus of the ubiquitin moiety in natural and engineered fusions irrespective of their sizes. UBP109 also released free ubiquitin from poly-His-tagged penta-ubiquitin. Moreover, it released free ubiquitin from poly-ubiquitinated protein conjugates of rabbit reticulocytes. In addition, UBP109 localized to both the cytoplasm and the nucleus and, among three putative nuclear localization sequences, only the one located near the C-terminus is responsible for nuclear localization. These results suggest that UBP109 may play an important role in generation of free ubiquitin from its precursors and its recycling from poly-ubiquitinated protein conjugates, and hence in regulation of ubiquitin-mediated cellular processes, particularly related to embryonic development.
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Affiliation(s)
- K C Park
- Division of Biological Sciences and Research Center for Cell Differentiation, College of Natural Sciences, Seoul National University, Seoul 151-742, Korea
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Røsok O, Pedeutour F, Odeberg J, Lundeberg J, Aasheim HC. The C1orf9 gene encodes a putative transmembrane member of a novel protein family. Biochem Biophys Res Commun 2000; 267:855-62. [PMID: 10673381 DOI: 10.1006/bbrc.1999.2016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Here we report the characterization of a human mRNA encoding a novel protein denoted C1orf9 (chromosome 1 open reading frame 9). The cDNA sequence, derived from a testis cDNA library, contains 5700 bp which encodes an open reading frame of 1254 amino acids. The deduced protein contains a putative N-terminal signal peptide and one putative transmembrane region, indicating membrane localization. No significant homology was found with known characterized proteins. However, a 150 amino acid region has significant homology to deduced protein sequences from other organisms, including Caenorhabditis elegans (43% identity), Saccharomyces cerevisiae (47% identity), Schizosaccharomyces pombe (48% identity), and two proteins from Arabidopsis thaliana (42% and 40% identity), suggesting a novel family of conserved domains. The C1orf9 gene was assigned to chromosome 1q24. The gene spans approximately 78.7 kb and is organized into at least 24 exons. Expression analysis revealed a single C1orf9 mRNA species of approximately 6.0 kb with a predominant expression in pancreas and testis, and only low levels of expression in other tissues examined.
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Affiliation(s)
- O Røsok
- Department of Immunology, Norwegian Radium Hospital, Montebello, Oslo, N-0310, Norway
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Somia NV, Schmitt MJ, Vetter DE, Van Antwerp D, Heinemann SF, Verma IM. LFG: an anti-apoptotic gene that provides protection from Fas-mediated cell death. Proc Natl Acad Sci U S A 1999; 96:12667-72. [PMID: 10535980 PMCID: PMC23041 DOI: 10.1073/pnas.96.22.12667] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Programmed cell death regulates a number of biological phenomena, and the apoptotic signal must itself be tightly controlled to avoid inappropriate cell death. We established a genetic screen to search for molecules that inhibit the apoptotic signal from the Fas receptor. Here we report the isolation of a gene, LFG, that protects cells uniquely from Fas but not from the mechanistically related tumor necrosis factor alpha death signal. LFG is widely distributed, but remarkably is highly expressed in the hippocampus. LFG can bind to the Fas receptor, but does not regulate Fas expression or interfere with binding of an agonist antibody. Furthermore LFG does not inhibit binding of FADD to Fas.
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Affiliation(s)
- N V Somia
- The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA
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26
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Broberg K, H�glund M, Limon J, Lindstrand A, Toksvig-Larsen S, Mandahl N, Mertens F. Rearrangement of the neoplasia-associated geneHMGIC in synovia from patients with osteoarthritis. Genes Chromosomes Cancer 1999. [DOI: 10.1002/(sici)1098-2264(199903)24:3<278::aid-gcc14>3.0.co;2-l] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Weremowicz S, Morton CC. Is HMGIC rearranged due to cryptic paracentric inversion of 12q in karyotypically normal uterine leiomyomas? Genes Chromosomes Cancer 1999; 24:172-3. [PMID: 9885987 DOI: 10.1002/(sici)1098-2264(199902)24:2<172::aid-gcc13>3.0.co;2-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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28
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Pedeutour F, Quade BJ, Weremowicz S, Dal Cin P, Ali S, Morton CC. Localization and expression of the human estrogen receptor beta gene in uterine leiomyomata. Genes Chromosomes Cancer 1998; 23:361-6. [PMID: 9824210 DOI: 10.1002/(sici)1098-2264(199812)23:4<361::aid-gcc12>3.0.co;2-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Estrogens have an important function in the natural history of uterine leiomyomata. The human estrogen receptor beta gene (ESR2) has been identified recently and mapped to 14q22-24, a region frequently rearranged in uterine leiomyomata and other benign tumors, including pulmonary chondroid hamartomas and endometrial polyps. Using fluorescence in situ hybridization and radiation hybrid mapping, we map ESR2 within 14q23-24.1, to a region approximately 2 Mb centromeric to the t(12;14) breakpoint in uterine leiomyomata, between markers D14S63 and WI-7536. Two YAC clones, 948B6 and 741H4, contain ESR2. Using RT-PCR, we show that ESR2 is expressed in uterine leiomyomata and pulmonary chondroid hamartomas as well as in normal myometrium. Lack of a direct relationship between rearrangement of 14q23-24 and ESR2 expression suggests that ESR2 is not involved with HMGIC or HMGIY in t(12;14) or t(6;14). However, because of its relatively close physical distance from the characteristic site of rearrangements in 14q23-24, a role for ESR2 in the pathobiology of these tumors warrants future consideration.
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Affiliation(s)
- F Pedeutour
- Department of Obstetrics, Gynecology and Reproductive Biology, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts 02115, USA
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