1
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Lu B, Yu Y, Xing XL, Liu RY. miR-183/TMSB4Y, a new potential signaling axis, involving in the progression of laryngeal cancer via modulating cell adhesion. J Recept Signal Transduct Res 2020; 42:133-140. [PMID: 33356743 DOI: 10.1080/10799893.2020.1863987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Laryngeal cancer (LCa) is a prevalent malignant head and neck cancer with relatively unclear pathogenesis. A prior study has suggested that miR-183 differentially expressed in laryngeal-related malignancies, but its accurate role has not been fully ascertained in LCa. miR-183 expression in LCa tissues and cells was detected assisted by TCGA/GEO databases or qRT-PCR assay, relatively. Target genes of miR-183 were predicted via accessing to TargetScan website. Luciferase activity analysis was conducted to determine the relationship between miR-183 and its possible target. CCK-8, colony formation and transwell invasion and migration experiments were implemented to measure LCa cell viability, invasion and migration. Western blot assay was utilized to evaluate cell adhesion and EMT-related proteins expressions. The expression of miR-183 was expressed in LCa tissue samples and cells at higher levels than normal controls. Upregulation of miR-183 facilitated Hep-2 and TU212 cells viability, while miR-183 reduction inhibited the proliferative potential of Hep-2 and TU212 cells. TMSB4Y was determined as a possible target of miR-183, and its expression was decreased in LCa. LCa patients with low TMSB4Y expression had poorer outcomes relative to that with high TMSB4Y expression. TMSB4Y overturned the promoting impacts of miR-183 on the LCa cellular malignant behaviors, including cell proliferation, colonogenicity, invasion and migration. miR-183 overexpression inhibited cell adhesion through inhibiting TMSB4Y expression. Overall, all results elucidated that miR-183, as an oncogenic molecule in LCa, may be used to predict the prognosis of LCa patients by targeting TMSB4Y.
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Affiliation(s)
- Bin Lu
- Department of Otorhinolaryngology and Head and Neck Surgery, The first people's Hospital of Jingzhou, Jingzhou, P.R. China
| | - Ying Yu
- E.N.T. department, Gaotang County People's Hospital, Liaocheng, P.R. China
| | - Xiao-Ling Xing
- Intravenous Medication Center of Binzhou People's Hospital, Binzhou, P.R. China
| | - Rui-Yue Liu
- Department of Otolaryngology, Heze Municipal Hospital, Heze, P.R. China
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2
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Wong HY, Wang GM, Croessmann S, Zabransky DJ, Chu D, Garay JP, Cidado J, Cochran RL, Beaver JA, Aggarwal A, Liu ML, Argani P, Meeker A, Hurley PJ, Lauring J, Park BH. TMSB4Y is a candidate tumor suppressor on the Y chromosome and is deleted in male breast cancer. Oncotarget 2016; 6:44927-40. [PMID: 26702755 PMCID: PMC4792601 DOI: 10.18632/oncotarget.6743] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 12/20/2015] [Indexed: 12/13/2022] Open
Abstract
Male breast cancer comprises less than 1% of breast cancer diagnoses. Although estrogen exposure has been causally linked to the development of female breast cancers, the etiology of male breast cancer is unclear. Here, we show via fluorescence in situ hybridization (FISH) and droplet digital PCR (ddPCR) that the Y chromosome was clonally lost at a frequency of ~16% (5/31) in two independent cohorts of male breast cancer patients. We also show somatic loss of the Y chromosome gene TMSB4Y in a male breast tumor, confirming prior reports of loss at this locus in male breast cancers. To further understand the function of TMSB4Y, we created inducible cell lines of TMSB4Y in the female human breast epithelial cell line MCF-10A. Expression of TMSB4Y resulted in aberrant cellular morphology and reduced cell proliferation, with a corresponding reduction in the fraction of metaphase cells. We further show that TMSB4Y interacts directly with β-actin, the main component of the actin cytoskeleton and a cell cycle modulator. Taken together, our results suggest that clonal loss of the Y chromosome may contribute to male breast carcinogenesis, and that the TMSB4Y gene has tumor suppressor properties.
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Affiliation(s)
- Hong Yuen Wong
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Grace M Wang
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sarah Croessmann
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Daniel J Zabransky
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - David Chu
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Joseph P Garay
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Justin Cidado
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Present address: Oncology iMED, AstraZeneca, Waltham, MA, USA
| | - Rory L Cochran
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Julia A Beaver
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Anita Aggarwal
- Veterans Affairs Medical Center, Washington, DC, USA.,The Georgetown University, Washington, DC, USA.,George Washington University School of Medicine, Washington, DC, USA
| | - Min-Ling Liu
- Veterans Affairs Medical Center, Washington, DC, USA.,George Washington University School of Medicine, Washington, DC, USA
| | - Pedram Argani
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alan Meeker
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Paula J Hurley
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Josh Lauring
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ben Ho Park
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Whiting School of Engineering, Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD, USA
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3
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Sayed Aly M. Interphase Cytogenetics of Male Breast Cancer. Breast J 2005; 11:532-3. [PMID: 16297133 DOI: 10.1111/j.1075-122x.2005.00173.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Ojopi EPB, Cavalli LR, Cavalieri LMB, Squire JA, Rogatto SR. Comparative genomic hybridization analysis of benign and invasive male breast neoplasms. CANCER GENETICS AND CYTOGENETICS 2002; 134:123-6. [PMID: 12034524 DOI: 10.1016/s0165-4608(01)00613-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Comparative genomic hybridization (CGH) analysis was performed for the identification of chromosomal imbalances in two benign gynecomastias and one malignant breast carcinoma derived from patients with male breast disease and compared with cytogenetic analysis in two of the three cases. CGH analysis demonstrated overrepresentation of 8q in all three cases. One case of gynecomastia presented gain of 1p34.3 through pter, 11p14 through q12, and 17p11.2 through qter, and loss of 1q41 through qter and 4q33 through qter. The other gynecomastia presented del(1)(q41) as detected by both cytogenetic and CGH analysis. CGH analysis of the invasive ductal carcinoma confirmed a gain of 17p11.2 through qter previously detected by cytogenetic analysis. These regions showed some similarity in their pattern of imbalance to the chromosomal alterations described in female and male breast cancer.
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MESH Headings
- Adolescent
- Adult
- Aged
- Breast Neoplasms, Male/genetics
- Breast Neoplasms, Male/pathology
- Chromosome Aberrations
- Chromosomes, Human, Pair 1/genetics
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 17/genetics
- Chromosomes, Human, Pair 4/genetics
- Chromosomes, Human, Pair 8/genetics
- Cytogenetic Analysis
- Humans
- Male
- Neoplasm Invasiveness/genetics
- Nucleic Acid Hybridization
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5
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Rudas M, Schmidinger M, Wenzel C, Okamoto I, Budinsky A, Fazeny B, Marosi C. Karyotypic findings in two cases of male breast cancer. CANCER GENETICS AND CYTOGENETICS 2000; 121:190-3. [PMID: 11063806 DOI: 10.1016/s0165-4608(00)00254-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Male breast cancer is uncommon; so far, only 10 cases with chromosome banding analysis have been published. We report the cytogenetic findings of two invasive breast cancers in two Caucasian men lacking a history of familial breast cancer and more than 70 years of age. Both had ductal carcinomas with lymphangiosis carcinomatosa and positive lymph nodes at diagnosis. Strong expression of estrogen receptor, weak expression of progesterone receptor, and lack of expression of androgen receptor by both tumors were demonstrated by immunohistochemistry, as well as lack of expression of p53 and C-ERB-B-2. The karyotypes were 45 approximately 46,XY,-Y[4],-7[2],+8[2],t(8;12)(q21;q24)[3], del(9)(q22)[3],del(11)(p11p14)[5],del(18)(q21)[7], t(19;20)(p10;q10)[8] [cp13] and 61 approximately 69,XXXY,-Y[3], del(2)(p21)[4],del(3)(p22q26)[3],-4,-4[5],+5,+5[5], dic(5;11)(p14;q23)[3],del(6)(q23)[4],del(8)(p21)[3],-9[4],-11[4],+ i(12)(p10)[4],-16[3],del(17)([13)[5],del(18)(q21)[4],+19[5], +20[4][cp7], respectively. Although the available data on male breast cancer are still very limited, our findings confirm that gain of an X chromosome, loss of the Y chromosome, gain of chromosome 5, and loss of material from chromosomes 17 and 18 are nonrandom aberrations in male breast cancer. Trisomy 8, characteristic of ductal carcinomas, was found in one case.
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Affiliation(s)
- M Rudas
- Institute of Clinical Pathology, University of Vienna, Wien, Austria
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6
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Adeyinka A, Mertens F, Bondeson L, Garne JP, Borg A, Baldetorp B, Pandis N. Cytogenetic heterogeneity and clonal evolution in synchronous bilateral breast carcinomas and their lymph node metastases from a male patient without any detectable BRCA2 germline mutation. CANCER GENETICS AND CYTOGENETICS 2000; 118:42-7. [PMID: 10731589 DOI: 10.1016/s0165-4608(99)00150-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Two synchronous bilateral breast carcinomas and their matched lymph node metastases from a 70-year-old man were cytogenetically analyzed. All four tumors were near-diploid, and except for the primary tumor from the right breast, had a 45,X,-Y clone in common. The loss of the Y chromosome was, however, common to all four tumors, whereas metaphase cells from peripheral blood lymphocytes showed a normal 46, XY chromosome complement. The primary tumor from the right breast was monoclonal, with loss of the Y chromosome and gain of 1q, whereas its metastasis had two related clones: the 45,X,-Y clone, and the other a more complex version of the clone in the primary tumor, with inv(3), -14, and del(16)(q13) as additional changes. The primary tumor from the left breast was polyclonal with three unrelated clones: 45,X,-Y/45,XY,-18/47,XY,+20, two of which were present in its metastasis. DNA flow cytometric studies showed diploidy for both primary tumors. No mutation in the BRCA2 gene was found on analysis of DNA from peripheral blood lymphocytes. The present findings show that del(16)(q13) is a recurrent finding among male breast carcinomas and that some of the primary cytogenetic abnormalities, as well as the pattern of chromosomal changes during the progression of sporadic breast carcinoma in the male, are similar to those in the female. In addition, the loss of the Y chromosome in the tumors but not in peripheral blood lymphocytes, suggests a possible role for this abnormality in the pathogenesis of male breast carcinoma.
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MESH Headings
- Aged
- Aneuploidy
- BRCA2 Protein
- Breast Neoplasms, Male/genetics
- Breast Neoplasms, Male/pathology
- Carcinoma, Ductal, Breast/genetics
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Ductal, Breast/secondary
- Chromosome Aberrations/genetics
- Chromosome Deletion
- Clone Cells/metabolism
- Clone Cells/pathology
- Flow Cytometry
- Genetic Predisposition to Disease/genetics
- Germ-Line Mutation/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Karyotyping
- Lymphatic Metastasis/genetics
- Lymphatic Metastasis/pathology
- Lymphocytes/metabolism
- Male
- Neoplasm Proteins/genetics
- Receptors, Estrogen/analysis
- Transcription Factors/genetics
- Y Chromosome/genetics
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Affiliation(s)
- A Adeyinka
- Departments of Clinical Genetics, University Hospital, Lund, Sweden
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7
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Cornélio DA, Schmid-Braz AT, Cavalli LR, Lima RS, Ribeiro EM, Cavalli IJ. Clonal karyotypic abnormalities in gynecomastia. CANCER GENETICS AND CYTOGENETICS 1999; 115:128-33. [PMID: 10598146 DOI: 10.1016/s0165-4608(99)00090-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Gynecomastia is a benign condition that frequently occurs in the male breast gland; however, the cytogenetic data on this entity are very limited. To our knowledge, three cases have been reported in the literature, and the only one with an abnormal karyotype had a concomitant breast carcinoma. In this study we report clonal chromosomal alterations in a gynecomastia sample without any signs of adjacent malignant tissue. The nonrandom abnormalities observed were a deletion of 12p, monosomies of chromosomes 9, 17, 19, and 20, and the presence of a marker chromosome. Most of these alterations have been previously described in the literature in other breast lesions, including benign and malignant (male and female) tumors, indicating their recurrence and nonrandomness in abnormal processes of the mammary gland.
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Affiliation(s)
- D A Cornélio
- Departamento de Genética do Setor de Ciências Biológicas, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
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8
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Teixeira MR, Pandis N, Dietrich CU, Reed W, Andersen J, Qvist H, Heim S. Chromosome banding analysis of gynecomastias and breast carcinomas in men. Genes Chromosomes Cancer 1998; 23:16-20. [PMID: 9713992 DOI: 10.1002/(sici)1098-2264(199809)23:1<16::aid-gcc3>3.0.co;2-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Male breast cancer is 100 times less frequent than its female counterpart and accounts for less than 1% of all cancers in men. Although men with breast cancer also often have gynecomastia, it is still unknown whether gynecomastia per se predisposes the male breast to malignant disease. We describe the cytogenetic analysis of three gynecomastias and four breast cancers in men. No chromosome abnormalities were detected in two cases of gynecomastia, with no other concomitant breast disease. The third gynecomastia sample, taken from a site where a breast carcinoma had previously been removed, had a t(2;11)(p24;p13) as the sole chromosome change; this is the first time that an abnormal karyotype has been described in gynecomastia. All four cancers had clonal chromosome abnormalities. Several cytogenetically unrelated clones were found in the breast tumor and in a metastasis from case 1. In the carcinoma of case 2, a single abnormal clone was found, characterized by loss of the Y chromosome, monosomy 17, and a deletion of the long arm of chromosome 18. In the carcinoma of case 3, a clone with loss of the Y chromosome as the sole change dominated, accompanied by the gain of an X chromosome in a subclone. In the lymph node metastasis examined from case 4, a single clone carrying trisomies for chromosomes 5 and 16 was detected. Our findings, especially when collated with data on the six karyotypically abnormal breast carcinomas in men described previously, indicate that gain of the X chromosome, gain of chromosome 5, loss of the Y chromosome, loss of chromosome 17, and del(18)(q21) are nonrandom abnormalities in male breast carcinomas.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Breast Neoplasms, Male/genetics
- Chromosome Aberrations
- Chromosome Banding
- Chromosome Disorders
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 16/genetics
- Chromosomes, Human, Pair 17/genetics
- Chromosomes, Human, Pair 18/genetics
- Chromosomes, Human, Pair 2/genetics
- Chromosomes, Human, Pair 5/genetics
- Gynecomastia/genetics
- Humans
- Karyotyping
- Male
- Middle Aged
- Translocation, Genetic
- X Chromosome/genetics
- Y Chromosome/genetics
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Affiliation(s)
- M R Teixeira
- Department of Genetics, The Norwegian Radium Hospital and Institute for Cancer Research, Oslo
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9
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Abstract
Although breast cancer is uncommon in men, it can cause significant morbidity and mortality. The current review was undertaken to determine whether strategies applied for the evaluation and treatment of breast cancer in females are appropriate in male breast cancer. Male breast cancer has biological differences compared with female breast cancer, including a high prevalence in certain parts of Africa, a higher incidence of oestrogen receptor positivity and more aggressive clinical behaviour. It responds to hormonal manipulation and chemotherapy, but optimal treatment regimens in males are unknown. Male breast cancer remains an uncommon disease. Most of our current knowledge regarding its biology, natural history and treatment strategies has been extrapolated from its female counterpart. Much research is needed to further characterise the molecular biological properties of male breast tumours and their prognostic significance, and to devise treatment strategies, including optimal chemotherapy regimens.
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10
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Cavalli LR, Rogatto SR, Rainho CA, dos Santos MJ, Cavalli IJ, Grimaldi DM. Cytogenetic report of a male breast cancer. CANCER GENETICS AND CYTOGENETICS 1995; 81:66-71. [PMID: 7773962 DOI: 10.1016/s0165-4608(94)00194-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The cytogenetic findings on G-banding in an infiltrating ductal breast carcinoma in a 69-year-old man are reported. The main abnormalities observed were trisomy of chromosomes 8 and 9 and structural rearrangement in the long arm of chromosome 17 (add(17)(q25)). Our results confirm the trisomy of chromosome 8 in the characterization of the subtype of ductal breast carcinomas and demonstrate that chromosome 17, which is frequently involved in female breast cancers, is also responsible for the development or progression of primary breast cancers in males.
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Affiliation(s)
- L R Cavalli
- Departamento de Genética, Universidade Federal do Paraná, Curitiba, Pr, Brazil
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11
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Wagner JL, Thomas CR, Koh WJ, Rudolph RH. Carcinoma of the male breast: update 1994. MEDICAL AND PEDIATRIC ONCOLOGY 1995; 24:123-32. [PMID: 7990761 DOI: 10.1002/mpo.2950240213] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In many ways, male and female breast cancers are similar, but do have some notable differences. Although the underlying etiology of male breast cancer may be partially due to hormonal or environmental changes, this disease is rare compared to female breast cancer. Most often, it presents as a painless lump, with estrogen receptor-positive infiltrating ductal carcinoma being the most common pathologic type. The main component of local therapy is either a radical or a modified radical mastectomy, with adjuvant chemotherapy proving useful. Estrogen receptor-positive tumors respond well to hormonal therapy. More research is needed in order to: (1) further characterize the molecular biological properties of male breast cancer tumors, (2) further investigate the role of adjuvant chemotherapy, and define successful regimens, and (3) determine optimal chemotherapy regimens in the treatment of metastatic disease. As this disease is a relatively rare condition, whenever possible, all patients should be allowed to participate in national cooperative group studies.
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Affiliation(s)
- J L Wagner
- Fred Hutchinson Cancer Research Center, Division of Clinical Research, Seattle, WA
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12
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Udayakumar AM, Bhargava MK. Chromosomal abnormalities in the lymphocytes of a male patient with breast cancer. CANCER GENETICS AND CYTOGENETICS 1994; 78:99-101. [PMID: 7987815 DOI: 10.1016/0165-4608(94)90054-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Blood lymphocyte cultures of a male with carcinoma of the breast revealed both numerical (hypodiploidy and hyperdiploidy) and structural abnormalities. Only few cases of male breast cancer have been cytogenetically characterized. Earlier studies revealed normal karyotypes in peripheral blood cultures of male breast cancer patients and abnormalities only in the tumor tissue. The present report describes 16.6% abnormal metaphases detected in the peripheral blood lymphocytes. Numerical abnormalities were loss of chromosome 9 and 19 and gain of chromosome 7. Structural abnormalities were a cell with marker, del(11)(q22-23) and dic(7;19)(q36;p13). These abnormalities are compared with male and female tumor karyotypes reported in the literature.
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Affiliation(s)
- A M Udayakumar
- Department of Pathology, Kidwai Memorial Institute of Oncology, Bangalore, India
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13
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Lu YJ, Xiao S, Yan YS, Fu SB, Liu QZ, Li P. Direct chromosome analysis of 50 primary breast carcinomas. CANCER GENETICS AND CYTOGENETICS 1993; 69:91-9. [PMID: 8402564 DOI: 10.1016/0165-4608(93)90081-v] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Direct chromosome analyses were performed in 50 cases of primary breast carcinoma. Thirty-six cases had modal chromosome counts in the diploid range; the other 14 cases were polyploid. Of the 22 cases with detailed G-banding analyses, the most frequent structural changes involved chromosome 1 (15 of 22), 3 (13 of 22), and 6 (13 of 22). Deletion of chromosome 1p was noted in nine cases, and both 3p- and 6q- were noted in 10 cases.
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Affiliation(s)
- Y J Lu
- Department of Biology, Harbin Medical College, People's Republic of China
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14
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Mitchell EL, Woodhouse B, Birch JM, Santibanez-Koref MF. The expression of aphidicolin-induced fragile sites in familial breast cancer patients. CANCER GENETICS AND CYTOGENETICS 1993; 67:108-12. [PMID: 8392434 DOI: 10.1016/0165-4608(93)90161-e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The expression frequency of aphidicolin-induced fragile sites was examined in familial breast cancer patients to determine whether this parameter could be used as a marker of genetic susceptibility in at-risk individuals. No difference was found in expression frequency between the breast cancer patients and a group of normal individuals (p = 0.61). This indicates that the expression frequency of aphidicolin-induced fragile sites is not a suitable marker for assessing genetic susceptibility in familial breast cancer.
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Affiliation(s)
- E L Mitchell
- CRC Department of Cancer Genetics, Paterson Institute for Cancer Research, Manchester, United Kingdom
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15
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Balazs M, Mayall BH, Waldman FM. Interphase cytogenetics of a male breast cancer. CANCER GENETICS AND CYTOGENETICS 1991; 55:243-7. [PMID: 1933827 DOI: 10.1016/0165-4608(91)90084-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Direct interphase cytogenetic analysis was performed on nuclei from a male breast tumor using fluorescence in situ hybridization (FISH). DNA probes specific for repetitive pericentromeric regions on chromosomes 1, 7, 9, 11, 15, 17, 18, X, and Y were used to determine chromosome copy numbers in interphase tumor cells. Copy number distributions varied greatly between chromosomes, showing major tumor populations with on (Y), two (X,9), three (11, 15, 18), and four (1, 7, 17) copies of the pericentromeric targets. The X chromosome was present in two copies in 84.7% of tumor nuclei, with the balance being primarily monosomic. Normal skin fibroblasts cultured from the same patient showed 99% monosomy X. The Y chromosome showed a minor population (12%) with two copies. The DNA index of the tumor was 2.0 as determined by flow cytometry. The proliferative activity of the tumor cells was simultaneously analyzed using detection of in vivo bromodeoxyuridine (BrdU) incorporation. The BrdU labeling index was 13.2%.
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Affiliation(s)
- M Balazs
- Department of Laboratory Medicine, University of California San Francisco 94143-0808
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16
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Mitchell EL, Santibanez-Koref MF. 1p13 is the most frequently involved band in structural chromosomal rearrangements in human breast cancer. Genes Chromosomes Cancer 1990; 2:278-89. [PMID: 2268577 DOI: 10.1002/gcc.2870020405] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cytogenetic data on 14 breast carcinomas were examined to determine which chromosome arms and bands are preferentially involved in structural chromosome changes. Chromosome arms 17p, 16q, and 1p and band 1p13 were found to be significantly involved. A review of the world literature confirmed 1p as being the most frequently involved arm in structural chromosome changes in breast cancer and 1p13 as being the band most frequently involved in such changes. The two sets of results were pooled, and the analysis of 113 tumours revealed 229 of 304 bands to be involved, with 1p13 affected in 20% of the tumours.
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Affiliation(s)
- E L Mitchell
- Cancer Research Campaign Department of Cancer Genetics, Paterson Institute for Cancer Research, Christie Hospital, Manchester, UK
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