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Arfan S, Thway K, Jones RL, Huang PH. Molecular Heterogeneity in Leiomyosarcoma and Implications for Personalised Medicine. Curr Treat Options Oncol 2024; 25:644-658. [PMID: 38656686 DOI: 10.1007/s11864-024-01204-5] [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] [Accepted: 04/04/2024] [Indexed: 04/26/2024]
Abstract
OPINION STATEMENT Leiomyosarcoma (LMS) is one of the more common subtypes of soft tissue sarcomas (STS), accounting for about 20% of cases. Differences in anatomical location, risk of recurrence and histomorphological variants contribute to the substantial clinical heterogeneity in survival outcomes and therapy responses observed in patients. There is therefore a need to move away from the current one-size-fits-all treatment approach towards a personalised strategy tailored for individual patients. Over the past decade, tissue profiling studies have revealed key genomic features and an additional layer of molecular heterogeneity among patients, with potential utility for optimal risk stratification and biomarker-matched therapies. Furthermore, recent studies investigating intratumour heterogeneity and tumour evolution patterns in LMS suggest some key features that may need to be taken into consideration when designing treatment strategies and clinical trials. Moving forward, national and international collaborative efforts to aggregate expertise, data, resources and tools are needed to achieve a step change in improving patient survival outcomes in this disease of unmet need.
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Affiliation(s)
- Sara Arfan
- Division of Molecular Pathology, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK
| | - Khin Thway
- Division of Molecular Pathology, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK
- The Royal Marsden NHS Foundation Trust, Fulham Road, London, SW3 6JJ, UK
| | - Robin L Jones
- The Royal Marsden NHS Foundation Trust, Fulham Road, London, SW3 6JJ, UK
- Division of Clinical Studies, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK
| | - Paul H Huang
- Division of Molecular Pathology, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK.
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Grimaudo MS, Renne SL, Colombo P, Giordano L, Gennaro N, Laffi A, Cariboni U, Cananzi FCM, Ruspi L, Santoro A, Bertuzzi AF. Prognostic value of mitotic count in leiomyosarcoma: A comprehensive monocentric retrospective study. Hum Pathol 2024; 143:17-23. [PMID: 38000682 DOI: 10.1016/j.humpath.2023.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/03/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
BACKGROUND Leiomyosarcomas (LMSs) include heterogeneous entities with different clinical courses not entirely predicted by known prognostic factors. In particular, the value of mitotic count as independent prognostic factor in LMS has been poorly investigated. METHODS We retrospectively analyzed all patients with a diagnosis of LMS who accessed to our Institution from June 1999 to May 2022 for which mitotic count was numerically expressed within the pathology report. Univariate and multivariate analyses were conducted to explore the prognostic value of mitotic count along with other clinical and histological variables. RESULTS We identified 121 eligible patients, with a median follow-up of 91.03 months (range 0.62-275.2 months). Median progression-free survival (mPFS) was 16.7 months, and median overall survival (mOS) was 105.6 months. In univariate analysis, mitotic count showed a significant impact on PFS and OS, with an hazard ratio per mitotic unit of 1.03 (1.01-1.04, p < 0.001) and 1.03 (1.01-1.04, p = 0.007), respectively. Similar results were found for locally advanced and metastatic patients, separately. Other significant prognostic factors for PFS were stage at diagnosis, performance status, tumor size and Ki-67, while differentiation, necrosis, grade, stage at diagnosis, tumor size, performance status and age at diagnosis were identified for OS. In multivariate analysis, the only significant factors were mitotic count and the presence of metastases at diagnosis for PFS, whereas the same two factors plus age at diagnosis were identified for OS. CONCLUSION Mitotic count represented the most important histological prognostic factor for OS and PFS in localized and metastatic LMS.
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Affiliation(s)
- Maria Susanna Grimaudo
- IRCCS Humanitas Research Hospital, Department of Oncology & Hematology, Rozzano, Italy; Humanitas University, Department of Biomedical Sciences, Pieve Emanuele, Italy.
| | - Salvatore Lorenzo Renne
- Humanitas University, Department of Biomedical Sciences, Pieve Emanuele, Italy; IRCCS Humanitas Research Hospital, Department of Pathology, Rozzano, Italy.
| | - Piergiuseppe Colombo
- Humanitas University, Department of Biomedical Sciences, Pieve Emanuele, Italy; IRCCS Humanitas Research Hospital, Department of Pathology, Rozzano, Italy.
| | - Laura Giordano
- IRCCS Humanitas Research Hospital, Department of Oncology & Hematology, Rozzano, Italy.
| | - Nicolò Gennaro
- Northwestern University, Department of Radiology, Feinberg School of Medicine, Chicago, USA.
| | - Alice Laffi
- IRCCS Humanitas Research Hospital, Department of Oncology & Hematology, Rozzano, Italy.
| | - Umberto Cariboni
- IRCCS Humanitas Research Hospital, Department of Thoracic Surgery, Rozzano, Italy.
| | - Ferdinando Carlo Maria Cananzi
- Humanitas University, Department of Biomedical Sciences, Pieve Emanuele, Italy; IRCCS Humanitas Research Hospital, Department of Sarcoma Surgery, Rozzano, Italy.
| | - Laura Ruspi
- IRCCS Humanitas Research Hospital, Department of Sarcoma Surgery, Rozzano, Italy.
| | - Armando Santoro
- IRCCS Humanitas Research Hospital, Department of Oncology & Hematology, Rozzano, Italy; Humanitas University, Department of Biomedical Sciences, Pieve Emanuele, Italy.
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Arshad J, Barreto-Coelho P, Jonczak E, Espejo A, D'Amato G, Trent JC. Identification of Genetic Alterations by Circulating Tumor DNA in Leiomyosarcoma: A Molecular Analysis of 73 Patients. JOURNAL OF IMMUNOTHERAPY AND PRECISION ONCOLOGY 2020; 3:64-68. [PMID: 36751526 PMCID: PMC9179395 DOI: 10.36401/jipo-20-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/31/2020] [Indexed: 01/20/2023]
Abstract
Background Leiomyosarcoma is a malignant mesenchymal tumor of cells of smooth muscle lineage arising commonly in retroperitoneum, uterus, large veins, and the limbs. The genetics of leiomyosarcomas are complex and there is very limited understanding of common driver mutations. Circulating tumor DNA (ctDNA) offers a rapid and noninvasive method of next-generation sequencing (NGS) that could be used for diagnosis, therapy, and detection of recurrence. Methods ctDNA testing was performed using Guardant360, which detects single nucleotide variants, amplifications, fusions, and specific insertion/deletion mutations in 73 genes using NGS. Results Of 73 patients, 59 were found to have one or more cancer-associated genomic alteration. Forty-five (76%) were female with a median age of 63 (range, 38-87) years. All samples were designated metastatic. The most common alterations were detected in Tp53 (65%), BRAF (13%), CCNE (13%), EGFR (12%), PIK3CA (12%), FGFR1 (10%), RB1(10%), KIT (8%), and PDGFRA (8%). Some of the other alterations included RAF1, ERBB2, MET, PTEN TERT, APC, and NOTCH1. Potentially targetable mutations, by Food and Drug Administration-approved or clinical trials, were found in 24 (40%) of the 73 patients. Four patients (5%) were found to have incidental germline TP53 mutations. Conclusion NGS of ctDNA allows identification of genomic alterations in plasma from patients with leiomyosarcoma. Unfortunately, there is limited activity of current targeted agents in leiomyosarcomas. These results suggest opportunities to develop therapy against TP53, cell cycle, and kinase signaling pathways. Further validation and prospective evaluation is warranted to investigate the clinical utility of ctDNA for patients with leiomyosarcoma.
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Affiliation(s)
- Junaid Arshad
- Department of Medicine, Division of Medical Oncology, Miller School of Medicine, Jackson Memorial Hospital/University of Miami, Miami, FL, USA
| | - Priscila Barreto-Coelho
- Department of Medicine, Division of Internal Medicine, Miller School of Medicine, Jackson Memorial Hospital/University of Miami, Miami, FL, USA
| | - Emily Jonczak
- Department of Medicine, Division of Medical Oncology, Miller School of Medicine, Jackson Memorial Hospital/University of Miami, Miami, FL, USA
| | - Andrea Espejo
- Department of Medicine, Division of Medical Oncology, Miller School of Medicine, Jackson Memorial Hospital/University of Miami, Miami, FL, USA
| | - Gina D'Amato
- Department of Medicine, Division of Medical Oncology, Miller School of Medicine, Jackson Memorial Hospital/University of Miami, Miami, FL, USA
,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Jonathan C. Trent
- Department of Medicine, Division of Medical Oncology, Miller School of Medicine, Jackson Memorial Hospital/University of Miami, Miami, FL, USA
,Sylvester Comprehensive Cancer Center, Miami, FL, USA
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Cuppens T, Moisse M, Depreeuw J, Annibali D, Colas E, Gil-Moreno A, Huvila J, Carpén O, Zikán M, Matias-Guiu X, Moerman P, Croce S, Lambrechts D, Amant F. Integrated genome analysis of uterine leiomyosarcoma to identify novel driver genes and targetable pathways. Int J Cancer 2017; 142:1230-1243. [DOI: 10.1002/ijc.31129] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 08/31/2017] [Accepted: 09/28/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Tine Cuppens
- Department of Oncology, Gynecologic Oncology; KU Leuven (University of Leuven); Leuven 3000 Belgium
- VIB Center for Cancer Biology, VIB; Leuven Belgium
| | - Matthieu Moisse
- Laboratory for Translational Genetics, Department of Human Genetics; KU Leuven; Leuven Belgium
| | - Jeroen Depreeuw
- Department of Oncology, Gynecologic Oncology; KU Leuven (University of Leuven); Leuven 3000 Belgium
- VIB Center for Cancer Biology, VIB; Leuven Belgium
- Laboratory for Translational Genetics, Department of Human Genetics; KU Leuven; Leuven Belgium
| | - Daniela Annibali
- Department of Oncology, Gynecologic Oncology; KU Leuven (University of Leuven); Leuven 3000 Belgium
| | - Eva Colas
- Biomedical Research Group in Gynecology, Vall Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, CIBERONC; Barcelona Spain
| | - Antonio Gil-Moreno
- Biomedical Research Group in Gynecology, Vall Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, CIBERONC; Barcelona Spain
- Gynecological Oncology Department; Vall Hebron University Hospital; Barcelona Spain
| | - Jutta Huvila
- Department of Pathology; University of Turku and Turku University Hospital; Turku Finland
| | - Olli Carpén
- Department of Pathology; University of Turku and Turku University Hospital; Turku Finland
- Department of Pathology and Genome Scale Research Program; University of Helsinki and HUSLAB, Helsinki University Hospital; Helsinki Finland
| | - Michal Zikán
- Department of Obstetrics and Gynecology; Gynecological Oncology Center, Charles University in Prague, 1st Faculty of Medicine and General University Hospital in Prague; Prague Czech Republic
| | - Xavier Matias-Guiu
- Pathological Oncology Group and Pathology Department; Hospital U Arnau de Vilanova, and Hospital U de Bellvitge, IRBLLEIDA and Idibell, University of Lleida, CIBERONC; Lleida Spain
| | - Philippe Moerman
- Department of Pathology; UZ Leuven - KU Leuven (University of Leuven); Leuven B-3000 Belgium
| | - Sabrina Croce
- Department of Biopathology; Institut Bergonié; Bordeaux F-33000 France
| | - Diether Lambrechts
- VIB Center for Cancer Biology, VIB; Leuven Belgium
- Laboratory for Translational Genetics, Department of Human Genetics; KU Leuven; Leuven Belgium
| | - Frédéric Amant
- Department of Oncology, Gynecologic Oncology; KU Leuven (University of Leuven); Leuven 3000 Belgium
- Centre for Gynecologic Oncology Amsterdam (CGOA), Antoni Van Leeuwenhoek - Netherlands Cancer Institute; Amsterdam The Netherlands
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Worhunsky DJ, Gupta M, Gholami S, Tran TB, Ganjoo KN, van de Rijn M, Visser BC, Norton JA, Poultsides GA. Leiomyosarcoma: One disease or distinct biologic entities based on site of origin? J Surg Oncol 2015; 111:808-12. [PMID: 25920434 DOI: 10.1002/jso.23904] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 02/28/2015] [Indexed: 11/05/2022]
Abstract
BACKGROUND Leiomyosarcoma (LMS) can originate from the retroperitoneum, uterus, extremity, and trunk. It is unclear whether tumors of different origin represent discrete entities. We compared clinicopathologic features and outcomes following surgical resection of LMS stratified by site of origin. METHODS Patients with LMS undergoing resection at a single institution were retrospectively reviewed. Clinicopathologic variables were compared across sites. Survival was calculated using the Kaplan-Meier method and compared using log-rank and Cox regression analyses. RESULTS From 1983 to 2011, 138 patients underwent surgical resection for LMS. Retroperitoneal and uterine LMS were larger, higher grade, and more commonly associated with synchronous metastases. However, disease-specific survival, recurrence-free survival, and recurrence patterns were not significantly different across the four sites. Synchronous metastases (HR 3.20, P < 0.001), but not site of origin, size, grade, or margin status, were independently associated with worse DSS. A significant number of recurrences and disease-related deaths were noted beyond 5 years. CONCLUSIONS Although larger and higher grade, retroperitoneal and uterine LMS share similar survival and recurrence patterns with their trunk and extremity counterparts. LMS of various anatomic sites may not represent distinct disease processes based on clinical outcomes. The presence of metastatic disease remains the most important prognostic factor for LMS.
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Affiliation(s)
- David J Worhunsky
- Department of Surgery, Stanford University Medical Center, Stanford, California
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Hayashi T, Horiuchi A, Sano K, Hiraoka N, Kasai M, Ichimura T, Sudo T, Tagawa YI, Nishimura R, Ishiko O, Kanai Y, Yaegashi N, Aburatani H, Shiozawa T, Konishi I. Potential role of LMP2 as tumor-suppressor defines new targets for uterine leiomyosarcoma therapy. Sci Rep 2011; 1:180. [PMID: 22355695 PMCID: PMC3240965 DOI: 10.1038/srep00180] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 11/07/2011] [Indexed: 12/15/2022] Open
Abstract
Although the majority of smooth muscle neoplasms found in the uterus are benign, uterine
leiomyosarcoma (LMS) is extremely malignant, with high rates of recurrence and metastasis.
We earlier reported that mice with a homozygous deficiency for LMP2, an interferon
(IFN)-γ-inducible factor, spontaneously develop uterine LMS. The IFN-γ pathway is important
for control of tumor growth and invasion and has been implicated in several cancers. In this
study, experiments with human and mouse uterine tissues revealed a defective LMP2 expression
in human uterine LMS that was traced to the IFN-γ pathway and the specific effect of JAK-1
somatic mutations on the LMP2 transcriptional activation. Furthermore, analysis of a
human uterine LMS cell line clarified the biological significance of LMP2 in malignant
myometrium transformation and cell cycle, thus implicating LMP2 as an anti-tumorigenic
candidate. This role of LMP2 as a tumor suppressor may lead to new therapeutic targets in
human uterine LMS.
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Affiliation(s)
- Takuma Hayashi
- Dept. of Immunology and Infectious Disease, Shinshu University Graduate School of Medicine.
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Lee CH, Ali R, Gilks CB. Molecular Genetics of Mesenchymal Tumors of the Female Genital Tract. Surg Pathol Clin 2009; 2:823-34. [PMID: 26838781 DOI: 10.1016/j.path.2009.08.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Mesenchymal tumors of the female genital tract are a heterogeneous group of neoplasms that can be classified based on cellular differentiation into 3 main groups: smooth muscle tumors, endometrial stromal tumors, and other differentiated and undifferentiated tumors. Genomic analysis techniques have revealed important genetic aberrations such as the t(7;17) translocation, resulting in JAZF1-JJAZ1 gene fusion, characteristic of endometrial stromal tumors. These analyses have demonstrated genetic complexity and heterogeneity in many mesenchymal tumor types. This article focuses on current understanding of the molecular genetics of mesenchymal tumors of the female genital tract, with emphasis on diagnostic and prognostic molecular features.
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Affiliation(s)
- Cheng-Han Lee
- Department of Pathology & Laboratory Medicine, University of British Columbia, 1st Floor JPPN, Vancouver General Hospital, 920 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada
| | - Rola Ali
- Department of Pathology & Laboratory Medicine, University of British Columbia, 1st Floor JPPN, Vancouver General Hospital, 920 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada
| | - C Blake Gilks
- Department of Pathology & Laboratory Medicine, University of British Columbia, 1st Floor JPPN, Vancouver General Hospital, 920 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada.
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Alvegård T, Hall KS, Bauer H, Rydholm A. The Scandinavian Sarcoma Group: 30 years' experience. ACTA ORTHOPAEDICA. SUPPLEMENTUM 2009; 80:1-104. [PMID: 19919379 DOI: 10.1080/17453690610046602] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Does comparative genomic hybridization reveal distinct differences in DNA copy number sequence patterns between leiomyosarcoma and malignant fibrous histiocytoma? ACTA ACUST UNITED AC 2008; 187:1-11. [PMID: 18992634 DOI: 10.1016/j.cancergencyto.2008.06.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Revised: 06/02/2008] [Accepted: 06/11/2008] [Indexed: 11/20/2022]
Abstract
Leiomyosarcoma (LMS) is the third most common type of soft tissue sarcoma after malignant fibrous histiocytoma (MFH) and liposarcoma. Comparative genomic hybridization (CGH) has shown similar DNA copy number imbalances in LMS and MFH. It has been suggested that both tumors may correspond to different differentiation states of a single tumor entity and that a large proportion of MFHs could correspond to undifferentiated LMS. We report CGH results from 102 MFH and 82 LMS cases, as well as a subsequent clustering analysis. The distribution pattern of DNA copy number changes could not differentiate LMS from MFH, suggesting that most MFHs could represent an ultimate state of tumor progression of LMS. Even if an oncogenic pattern common to LMS and MFH is valid, the genes relevant to smooth muscle cell differentiation may reside in one or more chromosomal imbalances that are not shared by both tumor types. Further explorative analysis identified a small cluster of tumors (9% of the samples: 2 LMS and 10 MFH) characterized by the presence of high-level amplifications at 1p33 approximately p34.3, 17q22 approximately q23, 17q25 approximately qter, 19p, 22p, and 22q, and associated with a higher proportion of tumors located in the thigh (P=0.003) and with male sex (P=0.079).
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Hayashi T, Shimamura Y, Saegusa T, Horiuchi A, Kobayashi Y, Hiraoka N, Kanai Y, Aburatani H, Sano K, Konishi I. Molecular mechanisms of uterine leiomyosarcomas: involvement of defect in LMP2 expression. GENE REGULATION AND SYSTEMS BIOLOGY 2008; 2:297-305. [PMID: 19787091 PMCID: PMC2733082 DOI: 10.4137/grsb.s470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Patients with uterine leiomyosarcoma (LMS) typically present with vaginal bleeding, pain, and a pelvic mass. Typical presentations with hypercalcemia or eosinophilia have been reported. Radiographic evaluation with combined positron emission tomography/computed tomography may assist in the diagnosis and surveillance of women with uterine LMS. A recently developed risk-assessment index is highly predictive of disease-specific survival. Ovarian preservation does not appear to negatively impact outcome, and the addition of adjuvant therapy after surgical treatment does not seem to improve survival. It is noteworthy that LMP2-deficient mice exhibit spontaneous development of uterine LMS with a disease prevalence of ~37% by 12 months of age. The LMP2 gene is transcribed from a promoter containing an interferon (IFN)-γ-response factor element; thus, the IFN-γ-signal strongly induces LMP2 expression. Furthermore, a recent report demonstrated the loss of ability to induce LMP2 expression, which is an interferon (IFN)-γ-inducible factor, in human uterine LMS tissues and cell lines. Analysis of human uterine LMS shows somatic mutations in the IFNγ signalling pathway, thus the loss of LMP2 induction is attributable to a defect in the earliest steps of the IFN-γ signalling pathway. The discovery of an impaired key cell-signalling pathway may provide new targets for diagnostic approaches and therapeutic intervention.
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Affiliation(s)
- Takuma Hayashi
- Department of Immunology and Infectious Disease, Shinshu University Graduate School of Medicine, Nagano, Japan.
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Abstract
Human sarcoma cells can be killed by radio- and chemotherapy, but tumor cells acquiring resistance frequently kill the patient. A keen understanding of the intracellular course of oncogenic cascades leads to the discovery of small molecular inhibitors of the involved phosphorylated kinases. Targeted therapy complements chemotherapy. Oncogene silencing is feasible by small interfering RNA. The restoration of some of the mutated or deleted tumor-suppressor genes (p53, Rb, PTEN, hSNF, INK/ARF and WT) by demethylation or reacetylation of their histones has been accomplished. Genetically engineered or naturally oncolytic viruses selectively lyse tumors and leave healthy tissues intact. Adeno- or retroviral vectors deliver genes of immunological costimulators, tumor antigens, chemo- or cytokines and/or tumor-suppressor proteins into tumor (sarcoma) cells. Suicide gene delivery results in apoptosis induction. Genes of enzymes that target prodrugs as their substrates render tumor cells highly susceptible to chemotherapy, with the prodrug to be targeted intracellularly. It will be combinations of sophisticated surgical removal of the nonencapsulated and locally invasive primary sarcomas, advanced forms of radiotherapy to the involved sites and immunotherapy with sarcoma vaccines that will cure primary sarcomas. Adoptive immunotherapy with immune lymphocytes will be operational in metastatic disease only when populations of regulatory T cells are controlled. Targeted therapy with small molecular inhibitors of oncogene cascades, the driving forces of sarcoma cells, alteration of the tumor stroma from a supportive to a tumor-hostile environment, reactivation or replacement of wild-type tumor-suppressor genes, and radio-chemotherapy (with much reduced toxicity) will eventually accomplish the cure of metastatic sarcomas.
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Affiliation(s)
- Joseph G Sinkovics
- The University of South Florida, Cancer Institute of St Joseph's Hospital, HL Moffitt Cancer Center, The University of South Florida College of Medicine, FL, USA.
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Kaur S, Larramendy ML, Vauhkonen H, Böhling T, Knuutila S. Loss of TP53 in sarcomas with 17p12~p11 gain. A fine-resolution oligonucleotide array comparative genomic hybridization study. Cytogenet Genome Res 2007; 116:153-7. [PMID: 17317953 DOI: 10.1159/000098180] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2006] [Accepted: 11/13/2006] [Indexed: 01/17/2023] Open
Abstract
The amplification or gain of the p-arm of chromosome 17 is common in sarcomas, suggesting its role in carcinogenesis. Here, we report the architectural structure and targets of 17p aberrations commonly shared by osteosarcoma (OS), leiomyosarcoma (LMS) and malignant fibrous histiocytoma (MFH) of soft tissue. Two low-grade and two high-grade soft tissue LMS, three OS, and two MFH samples were studied using fine-resolution oligonucleotide-based microarray comparative genomic hybridization. Eight of the nine samples showed a loss of 17pter-->p13, the locus of tumor suppressor TP53 preceding the amplified area 17p12-->p11.2. The size and detailed architecture of the amplified region of 17p differed between the studied sarcoma entities. OS and high-grade LMS showed similar complex patterns of discontinuous amplifications with regions of gain in between. MFH and low-grade LMS showed continuous regions of gains and amplifications. Precise boundaries of the lost or gained regions were determined, and in addition to the previously suggested targets of the region, ELAC and FLCN were amplified in all the sarcoma entities.
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Affiliation(s)
- S Kaur
- Department of Pathology, Haartman Institute and HUSLAB, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
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