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Becker AK, Puladi B, Xie K, Cassataro A, Götzl R, Hölzle F, Beier JP, Knüchel-Clarke R, Braunschweig T. HER3 (ERBB3) amplification in liposarcoma - a putative new therapeutic target? World J Surg Oncol 2024; 22:131. [PMID: 38760830 PMCID: PMC11100077 DOI: 10.1186/s12957-024-03406-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Accepted: 05/07/2024] [Indexed: 05/19/2024] Open
Abstract
BACKGROUND Liposarcomas are among the most common mesenchymal malignancies. However, the therapeutic options are still very limited and so far, targeted therapies had not yet been established. Immunotherapy, which has been a breakthrough in other oncological entities, seems to have no efficacy in liposarcoma. Complicating matters further, classification remains difficult due to the diversity of morphologies and nonspecific or absent markers in immunohistochemistry, leaving molecular pathology using FISH or sequencing as best options. Many liposarcomas harbor MDM2 gene amplifications. In close relation to the gene locus of MDM2, HER3 (ERBB3) gene is present and co-amplification could occur. Since the group of HER/EGFR receptor tyrosine kinases and its inhibitors/antibodies play a role in a broad spectrum of oncological diseases and treatments, and some HER3 inhibitors/antibodies are already under clinical investigation, we hypothesized that in case of HER3 co-amplifications a tumor might bear a further potential therapeutic target. METHODS We performed FISH analysis (MDM2, DDIT3, HER3) in 56 archived cases and subsequently performed reclassification to confirm the diagnosis of liposarcoma. RESULTS Next to 16 out of 56 cases needed to be re-classified, in 20 out of 54 cases, a cluster-amplification of HER3 could be detected, significantly correlating with MDM2 amplification. Our study shows that the entity of liposarcomas show specific molecular characteristics leading to reclassify archived cases by modern, established methodologies. Additionally, in 57.1% of these cases, HER3 was cluster-amplified profusely, presenting a putative therapeutic target for targeted therapy. CONCLUSION Our study serves as the initial basis for further investigation of the HER3 gene as a putative therapeutic target in liposarcoma.
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Affiliation(s)
| | - Behrus Puladi
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, 52074, Aachen, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Aachen, Germany
| | - Kunpeng Xie
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, 52074, Aachen, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Aachen, Germany
| | - Angela Cassataro
- Institute of Pathology, University Hospital RWTH Aachen, 52074, Aachen, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Aachen, Germany
| | - Rebekka Götzl
- Department of Plastic, Hand Surgery - Burn Center, University Hospital RWTH Aachen, 52074, Aachen, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Aachen, Germany
| | - Frank Hölzle
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, 52074, Aachen, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Aachen, Germany
| | - Justus P Beier
- Department of Plastic, Hand Surgery - Burn Center, University Hospital RWTH Aachen, 52074, Aachen, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Aachen, Germany
| | - Ruth Knüchel-Clarke
- Institute of Pathology, University Hospital RWTH Aachen, 52074, Aachen, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Aachen, Germany
| | - Till Braunschweig
- Institute of Pathology, University Hospital RWTH Aachen, 52074, Aachen, Germany.
- Institute of Pathology, Faculty of Medicine, LMU Munich, Thalkirchner Strasse 36, 80337, Munich, Germany.
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Tsuji T, Fukuda T, Tamiya S, Tsuneyoshi M. Dedifferentiated Components Versus Well-differentiated Components in Dedifferentiated Lip sarcoma: A Comparative Study of Their Proliferative Activity and Interphase Cytogenetics Using MIB-1 Immunostaining and Fluorescence in Situ Hybridization. Int J Surg Pathol 2016. [DOI: 10.1177/106689699900700101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We retrospectively analyzed the proliferative activity and the centromeric copy number of chromosomes 8, 12, and 17 in both well-differentiated components and dedifferentiated ones of 10 dedifferentiated lip sarcoma cases by using MIB-1 immunostaining and fluorescence in situ hybridization (FISH) on the paraffin-embedded tissue specimens. The MIB1 labeling index (LI) in dedifferentiated components was higher than that in the well-differentiated components (p<.01). Chromosomal aberrations such as gains in chromosomes 8, 12, and 17 were found in two dedifferentiated components of the seven cases in which signals were detected. The most frequent aberrations were a gain in chromosome 17 (cases 2 and 10), followed by gains in chromosomes 8 (case 10) and 12 (case 2). In contrast, no chromosomal aberrations were observed in any of the eight well-differentiated components in which signals were detected. Based on these findings, chromosomal aberrations in the dedifferentiated components may reflect aggresive tumor progression in dedifferentiated lip sarcoma.
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Affiliation(s)
| | | | | | - Masazumi Tsuneyoshi
- Second Department of Pathology, Faculty of Medicine, Kyushu University, Fukuoka 812-82, Japan
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3
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Al-Zaid T, Wang WL, Lopez-Terrada D, Lev D, Hornick JL, Hafeez Diwan A, Fletcher CDM, Lazar AJ. Pleomorphic fibroma and dermal atypical lipomatous tumor: are they related? J Cutan Pathol 2013; 40:379-84. [DOI: 10.1111/cup.12095] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 01/06/2013] [Accepted: 01/13/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Tariq Al-Zaid
- Department of Pathology; The University of Texas MD Anderson Cancer Center; Houston; TX; USA
| | - Wei-Lien Wang
- Department of Pathology; The University of Texas MD Anderson Cancer Center; Houston; TX; USA
| | | | | | - Jason L. Hornick
- Department of Pathology; Brigham and Women's Hospital and Harvard Medical School; Boston; MA; USA
| | - A. Hafeez Diwan
- Department of Pathology; Baylor College of Medicine; Houston; TX; USA
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Dodd LG. Update on Liposarcoma: A review for cytopathologists. Diagn Cytopathol 2011; 40:1122-31. [DOI: 10.1002/dc.21794] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Accepted: 07/07/2011] [Indexed: 11/10/2022]
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5
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Cellular Angiofibroma With Atypia or Sarcomatous Transformation: Clinicopathologic Analysis of 13 Cases. Am J Surg Pathol 2010; 34:707-14. [DOI: 10.1097/pas.0b013e3181d74bdb] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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6
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Binh MBN, Garau XS, Guillou L, Aurias A, Coindre JM. Reproducibility of MDM2 and CDK4 Staining in Soft Tissue Tumors. Am J Clin Pathol 2006. [DOI: 10.1309/vmbp67qunn6q3j0e] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Binh MBN, Sastre-Garau X, Guillou L, de Pinieux G, Terrier P, Lagacé R, Aurias A, Hostein I, Coindre JM. MDM2 and CDK4 Immunostainings Are Useful Adjuncts in Diagnosing Well-Differentiated and Dedifferentiated Liposarcoma Subtypes. Am J Surg Pathol 2005; 29:1340-7. [PMID: 16160477 DOI: 10.1097/01.pas.0000170343.09562.39] [Citation(s) in RCA: 398] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Atypical lipomatous tumor/well-differentiated liposarcoma (ALT-WDLPS) and dedifferentiated liposarcoma (DDLPS) may be difficult to distinguish from benign adipose tumors and from poorly differentiated sarcomas, respectively. Genetically, they are characterized by amplification of MDM2 and CDK4 genes on chromosome 12q13-15. We examined a series of 559 soft tissue tumors (44 ALT-WDLPS, 61 DDLPS, 49 benign adipose tumors, and 405 non-ALT-WDLPS/DDLPS sarcomas) for MDM2 and CDK4 expression using immunohistochemistry. MDM2 and CDK4 immunoexpressions were compared with gene amplification status (as assessed by quantitative PCR and/or comparative genomic hybridization) in 241 neoplasms. Most ALT-WDLPS/DDLPS expressed MDM2 (97%) and CDK4 (92%) as opposed to few benign adipose tumors (MDM2, 5%; CDK4, 2%) and a limited number of non-ALT-WDLSP/DDLPS sarcomas (MDM2, 19%; CDK4, 6%). The sensitivity and specificity of MDM2 and CDK4 immunostainings in identifying ALT-WDLPS/DDLPS among other soft tissue tumors were 97% and 92%, and 83% and 95%, respectively. MDM2 and CDK4 immunostainings were particularly useful to separate ALT-WDLPS from the large group of differentiated adipose tumors, and to distinguish DDLPS from poorly differentiated sarcomas. A strong correlation was observed between MDM2 and CDK4 stainings and gene amplification status. In conclusion, MDM2 and CDK4 immunostainings, which correlate with gene amplification, are helpful adjuncts to differentiate ALT-WDLPS from benign adipose tumors and to separate DDLPS from poorly differentiated sarcomas.
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Sirvent N, Maire G, Pedeutour F. Genetics of dermatofibrosarcoma protuberans family of tumors: from ring chromosomes to tyrosine kinase inhibitor treatment. Genes Chromosomes Cancer 2003; 37:1-19. [PMID: 12661001 DOI: 10.1002/gcc.10202] [Citation(s) in RCA: 216] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Dermatofibrosarcoma protuberans (DP) is a rare, slow-growing, infiltrating dermal neoplasm of intermediate malignancy, made up of spindle-shaped tumor cells often positive for CD34. The preferred treatment is wide surgical excision with pathologically negative margins. At the cytogenetic level, DP cells are characterized by either supernumerary ring chromosomes, which have been shown by using fluorescence in situ hybridization techniques to be derived from chromosome 22 and to contain low-level amplified sequences from 17q22-qter and 22q10-q13.1, or t(17;22), that are most often unbalanced. Both the rings and linear der(22) contain a specific fusion of COL1A1 with PDGFB. Similar to other tumors, the COL1A1-PDGFB fusion is occasionally cryptic, associated with complex chromosomal rearrangements. Although rings have been mainly observed in adults, translocations have been reported in all pediatric cases. DP is therefore a unique example of a tumor in which (i) the same molecular event occurs either on rings or linear translocation derivatives, (ii) the chromosomal abnormalities display an age-related pattern, and (iii) the presence of the specific fusion gene is associated with the gain of chromosomal segments, probably taking advantage of gene dosage effects. In all DP cases that underwent molecular investigations, the breakpoint localization in PDGFB was found to be remarkably constant, placing exon 2 under the control of the COL1A1 promoter. In contrast, the COL1A1 breakpoint was found to be variably located within the exons of the alpha-helical coding region (exons 6-49). No preferential COL1A1 breakpoint and no correlation between the breakpoint location and the age of the patient or any clinical or histological particularity have been described. The COL1A1-PDGFB fusion is detectable by multiplex RT-PCR with a combination of forward primers designed from a variety of COL1A1 exons and one reverse primer from PDGFB exon 2. Recent studies have determined the molecular identity of "classical" DP, giant cell fibroblastoma, Bednar tumor, adult superficial fibrosarcoma, and the granular cell variant of DP. In approximately 8% of DP cases, the COL1A1-PDGFB fusion is not found, suggesting that genes other than COL1A1 or PDGFB might be involved in a subset of cases. It has been proposed that PDGFB acts as a mitogen in DP cells by autocrine stimulation of the PDGF receptor. It is encouraging that inhibitory effects of the PDGF receptor tyrosine kinase antagonist imatinib mesylate have been demonstrated in vivo; such targeted therapies might be warranted in the near future for treatment of the few DP cases not manageable by surgery.
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Affiliation(s)
- Nicolas Sirvent
- Service de Pédiatrie, Centre hospitalier universitaire de Nice, Nice, France
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Forus A, Bjerkehagen B, Sirvent N, Meza-Zepeda LA, Coindre JM, Berner JM, Myklebost O, Pedeutour F. A well-differentiated liposarcoma with a new type of chromosome 12-derived markers. CANCER GENETICS AND CYTOGENETICS 2001; 131:13-8. [PMID: 11734312 DOI: 10.1016/s0165-4608(01)00516-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Well-differentiated liposarcomas (WDLPS) are cytogenetically characterized by the presence of supernumerary ring or giant rod marker chromosomes. These supernumerary chromosomes are composed of amplified sequences from chromosome 12 (12q14 approximately 15) in association with amplified segments from various other chromosomes, and contain alterations of the alpha satellite sequences. We report a case of WDLPS of the lipoma-like and sclerosing subtype that contains a novel type of supernumerary marker chromosome. Instead of rings or giant rods, these cells had three apparently identical copies of a subtelocentric supernumerary marker with a size and shape similar to C-group chromosomes. Fluorescence in situ hybridization analysis revealed that the markers were composed of amplified material from 12q14 approximately 15, including the genes MDM2 and CDK4. Similar to the rings and giant rods observed in other WDLPS cases, these unusual markers had no alpha satellite repeats at the primary constriction site, but centromeric activity could be demonstrated by using anti-centromere protein C antibodies. These findings show that the supernumerary markers of WDLPS may be variable in size and shape, but consistently share the same genomic structure, specifically 12q amplified sequences together with centromere alterations, and underline the importance of molecular methods in the diagnosis of adipose tissue tumors.
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Affiliation(s)
- A Forus
- Department of Tumour Biology, The Norwegian Radium Hospital, Montebello, 0310, Oslo, Norway.
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10
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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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11
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Pedeutour F, Forus A, Coindre JM, Berner JM, Nicolo G, Michiels JF, Terrier P, Ranchere-Vince D, Collin F, Myklebost O, Turc-Carel C. Structure of the supernumerary ring and giant rod chromosomes in adipose tissue tumors. Genes Chromosomes Cancer 1999. [DOI: 10.1002/(sici)1098-2264(199901)24:1<30::aid-gcc5>3.0.co;2-p] [Citation(s) in RCA: 204] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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12
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Abstract
We report here on two cases of retroperitoneal liposarcoma which heterochronously occurred in two siblings. A huge myxoid liposarcoma, 20 x 14 cm size, was noticed in a 33-year-old female, who died with multiple liver metastasis in about half a year. Two years later after the death of the younger sister, pleomorphic liposarcoma, 8 x 8 cm in size, was noticed in a 39-year-old male who died with local recurrence and multiple metastasis one year after the operation. Their mother (69 years old) had had an operation for malignant fibrous histiocytoma of the right thigh at age 66. There was no evidence of multiple lipomatosis, an autosomal dominant trait, in the siblings or their family. Diverse soft-tissue sarcomas, but not liposarcoma, occur excessively in siblings with the syndrome of Li-Fraumeni. To our knowledge this is the first such report of its sibship occurrence.
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Affiliation(s)
- T Narita
- Department of Pathology, Mutsu General Hospital, Japan
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Turc-Carel C, Pedeutour F, Durieux E. Characteristic chromosome abnormalities and karyotype profiles in soft tissue tumors. CURRENT TOPICS IN PATHOLOGY. ERGEBNISSE DER PATHOLOGIE 1995; 89:73-94. [PMID: 7882721 DOI: 10.1007/978-3-642-77289-4_5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Characteristic chromosome abnormalities and karyotype profiles are emerging for the soft tissue tumors. The notable findings are summarized in the Table 1. Within the broad range of solid tumors, it is certainly the soft tissue tumors in which the most spectacular success has occurred with regard to neoplasia-associated chromosome abnormalities. Cytogenetic studies of soft tissue tumors have been encouraged by the early and growing supporting interest of pathologists and clinicians concerned with soft tissue tumors. However, when one considers the variety of types and subtypes of benign and malignant soft tissue tumors, the number that has been so far characterized by a specific chromosome change is still very small. But, as we attempt to demonstrate in this report, these data should be viewed as paradigms for the importance of cytogenetic investigations in solid tumors. Cytogenetic studies of solid tumors are of more than clinical interest. Cytogenetic studies allow molecular investigations of the chromosomal breakpoints. They allow the search to proceed for genes involved in the chromosomal changes, providing a better knowledge of the malignant transformation process. In addition, the fruits of the combined efforts in cytogenetic and molecular technologies, from which has come "molecular cytogenetics," will let us recognize more conveniently, more quickly and, hopefully, less expensively the well-characterized diagnostic chromosome markers in tumor cells. Thus, we may be able to reach the goal of incorporating cytogenetics into standard diagnostic procedures for solid tumors, as has been achieved with hematological malignancies. Molecular cytogenetics including fluorescent in situ hybridization (FISH) technology promises to bring soft tissue tumor cytogenetics into regular diagnostic armamentaria and concurrently speed research into the basis of soft tissue tumors.
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Donner LR. Cytogenetics of tumors of soft tissue and bone. Implication for pathology. CANCER GENETICS AND CYTOGENETICS 1994; 78:115-26. [PMID: 7828142 DOI: 10.1016/0165-4608(94)90079-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Pathologists should be aware of the existence of diagnostically useful chromosomal rearrangements in several soft tissue and bone tumors. They include rearrangement of 8q12 in lipoblastomas, ring chromosomes in atypical lipomas, ring and giant marker chromosomes in well differentiated liposarcomas, t(12;16)(q13;p11) in myxoid liposarcomas, rearrangement of 7p21-22 in low-grade endometrial stromal sarcomas, t(2;13)(q37;q14) in alveolar rhabdomyosarcomas, t(X;18)(p11.2;q11.2) in synovial sarcomas, t(12;22) (q13;q13) in clear cell sarcomas, t(11;22)(q24;q12) in Ewing's sarcomas and peripheral neuroepitheliomas, and t(9;22)(q21-31;q11-12) in extraskeletal myxoid chondrosarcomas.
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Affiliation(s)
- L R Donner
- Department of Pathology, Scott & White Clinic and Memorial Hospital, Temple, TX 76508
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Pedeutour F, Suijkerbuijk RF, Forus A, Van Gaal J, Van de Klundert W, Coindre JM, Nicolo G, Collin F, Van Haelst U, Huffermann K. Complex composition and co-amplification of SAS and MDM2 in ring and giant rod marker chromosomes in well-differentiated liposarcoma. Genes Chromosomes Cancer 1994; 10:85-94. [PMID: 7520271 DOI: 10.1002/gcc.2870100203] [Citation(s) in RCA: 142] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Extra abnormal chromosomes (rings and giant rods) containing chromosome 12 sequences are characteristic of well-differentiated liposarcoma (WDLPS). By whole chromosome painting we found in 6 WDLPS that minimally 5 chromosomes had contributed to the formation of the extra abnormal chromosomes. To the constant chromosome 12 contribution, sequences were variably added from chromosomes 1, 4, and 16. Material from chromosomes 1, 4, and 12 was identified by painting in interphase nuclear projections ("blebs") and in micronuclei consistent with the concept that blebs are precursors to micronuclei. The complexity of the mechanisms generating the extra abnormal chromosomes in WDLPS was also attested to by the diversity and, in some cases, intricacy of the patterns of fluorescence. To begin to fathom the function of the extra abnormal chromosomes we examined the amplification of genes, including SAS, MDM2, and GADD153/CHOP, known to be in the region 12q13-14. SAS and MDM2 demonstrated constant co-amplification. GADD153/CHOP, which is critically rearranged in myxoid liposarcoma, was not amplified in WDLPS.
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Affiliation(s)
- F Pedeutour
- Laboratoire de Génétique Moléculaire des Cancers Humains, URA CNRS 1462, Nice, France
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Suijkerbuijk RF, Olde Weghuis DE, Van den Berg M, Pedeutour F, Forus A, Myklebost O, Glier C, Turc-Carel C, Geurts van Kessel A. Comparative genomic hybridization as a tool to define two distinct chromosome 12-derived amplification units in well-differentiated liposarcomas. Genes Chromosomes Cancer 1994; 9:292-5. [PMID: 7519052 DOI: 10.1002/gcc.2870090410] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Well-differentiated liposarcomas (WDLPS) are frequently characterized by a near-diploid karyotype with supernumerary ring and/or giant rod-shaped marker chromosomes. We have shown, using fluorescence in situ hybridization (FISH) and molecular strategies, that these markers contain chromosome 12-derived sequences. Here we report the analysis of six WDLPS for the presence of amplified DNA segments by means of the recently developed comparative genomic hybridization (CGH) strategy. Two distinct chromosome 12-derived amplification units could be identified in all tumors examined, one located in the q14-q15 region as expected, the second unexpectedly mapping to q21.3-q22. Our results indicate that the concerted amplification of these two distinct regions on the long arm of chromosome 12 may be a consistent characteristic of WDLPS. These amplifications are most likely directly related to the presence of supernumerary ring and/or giant marker chromosomes in this group of soft tissue tumors.
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Affiliation(s)
- R F Suijkerbuijk
- Department of Human Genetics, University Hospital, Nijmegen, The Netherlands
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17
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Pedeutour F, Suijkerbuijk RF, Van Gaal J, Van de Klundert W, Coindre JM, Van Haelst A, Collin F, Huffermann K, Turc-Carel C. Chromosome 12 origin in rings and giant markers in well-differentiated liposarcoma. CANCER GENETICS AND CYTOGENETICS 1993; 66:133-4. [PMID: 8500103 DOI: 10.1016/0165-4608(93)90245-h] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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