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Prediction of the Structure and Mutations Instability of the Med12 Exon2 Gene in Uterine Fibroids in Senegalese Women

Received: 9 September 2019     Accepted: 20 September 2019     Published: 30 September 2019
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Abstract

Uterine fibroids are benign proliferations of slow evolution. They are associated with significant morbidity and constitute a real public health problem. Despite the large-scale medical and financial burden posed by uterine fibroids, the functional roles of the various factors and genes involved in their etiology and growth remain unclear. This shows a great need to undertake a study that would evaluate the molecular features of uterine fibroids. It is in this context that our study is based on 50 Senegalese women with uterine fibroids. Samples of tumour tissue and blood were taken from each patient. After sequencing, the raw data was submitted to the Mutation Surveyor software version 5.0.1. Pathogenicity of mutations was evaluated with Polyphen software. To better understand the functional impact of missense mutations at the three-dimensional level, we simulated the structure of the protein by the ab-initio method using the I-Tasser web server. After cleaning, correcting and aligning the sequences with the BioEdit software version 8.0.5, the amino acid frequencies for the blood and tumour tissue samples were retrieved with the MEGA7 software. To see if there is a difference in the distribution of each amino acid between blood and tumour tissue, the average comparison test was performed with the R software version 3.3.1. Our results showed the presence of mutations of the MED12 gene only in tumour tissues. All mutations are predicted to be deleterious. In comparison to the reference sequence, all the mutations show a conformational change in the 3D structure of the MED12 protein. In addition, the mutations p. Q43P, p. G44S, p. G44D, p. G44R, p. F45V, p. K60M give proteins of α-β structure different from the reference sequence which has an α structure. All mutations alter the predicted function of the MED12 protein, which further suggests their involvement in the pathobiology of uterine fibroids in Senegalese women. With regard to amino acid frequencies, the comparison of means between blood and tumour tissue samples shows different distributions for amino acids such as cysteine, aspartic acid, glycine, histidine, leucine, arginine and serine. The results obtained make it possible to better understand the molecular mechanisms involved in the etiology of uterine fibroids. They allow glimpsing applications for the screening of populations at risk, for a non-invasive diagnosis or even for preventive or curative treatment.

Published in International Journal of Genetics and Genomics (Volume 7, Issue 3)
DOI 10.11648/j.ijgg.20190703.18
Page(s) 80-87
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Uterine Fibroids, MED12 Mutations, Amino Acids, Biomarker

References
[1] A. Audebert, "External endometriosis: histogenesis, etiology and natural evolution", Rev Practitioner, vol. 40, 1990, pp. 1077-1081.
[2] D. D. Baird, D. B. Dunson, M. C. Hill, D. Cousins, J. M. Schectman, " High cumulative incidence of uterine leiomyoma in black and white women: ultrasound evidence ", Am J Obstet Gynecol, vol. 188, 2003, pp. 100-107.
[3] S. Okolo, " Incidence, aetiology and epidemiology of uterine fibroids”, Best Pract Res Clin Obstet Gynaecol, vol. 22, 2008, pp. 571-588.
[4] S. M. Schwartz, L. M. Marshall, D. D. Baird, "Epidemiologic contributions to understanding the etiology of uterine leiomyomata", Environ Heal Perspect, vol. 108, No. 5, 2000, pp. 821-827.
[5] G. P. Flake, J. Andersen, D. Dixon, "Etiology and Pathogenesis of Uterine Leiomyomas: A Review", Environ Health Perspect, vol. 11, No. 8, 2003, pp. 1037-1054.
[6] B. Aissani, K. Zhang, H. Wiener, "Genetic determinants of uterine fibroid size in the Multiethnic NIEHS uterine fibroid study", Inter J Mol Epidemiol Genet, vol. 6, No. 1, 2015, pp. 9-19.
[7] N. Mäkinen, M. Mehine, J. Tolvanen, E. Kaasinen, Y. Li, H. J. Lehtonen, M. Gentile, J. Yan, M. Enge, M. Taipale, M. Aavikko, R. Katainen, E. Virolainen, T. Böhling, T. A. Koski, V. Launonen, J. Sjöberg, L. A. Aaltonen, "MED12, the Mediator Complex Subunit 12 Gene, Is Mutated at High Frequency in Uterine Leiomyomas", Science, vol. 334, 2011, pp. 252-254.
[8] N. Mäkinen, H. R. Heinonen, S. Moore, I. P. M. Tomlinson, Z. M. Van der Spuy, L. A. Aaltonen, "MED12 exon 2 mutations are common in uterine leiomyomas from South African patients", Oncotarget, vol. 2, No. 12, 2011, pp. 966-969.
[9] E. Bertsch, W. Qiang, Q. Zhang, M. Espona-Fiedler, S. Druschitz, Y. Liu, K. Mittal, B. Kong, T. Kurita, J. J. Wei, "MED12 and HMGA2 mutations: Two independent genetic events in uterine leiomyoma and leiomyosarcoma", Mod Pathol, vol. 27, No. 8, 2014, pp. 1144-1153.
[10] K. Kämpjärvi, T. M. Järvinen, T. Heikkinen, K. W. Hoag, O. Dufva, M. Kontro, L. Rassenti, E. Hertlein, T. J. Kipps, K. Porkka, J. C. Byrd, A. De la Chapelle, P. Vahteristo, "Somatic MED12 mutations are associated with poor prognosis markers in chronic lymphocytic leukemia", Oncotarget, vol. 6, No. 3, 2014, pp. 1884-1888.
[11] B. Kénémé, F. Mbaye, S. Ka, B. Diop, A. Dem, M. Sembène, "Mediator Complex Subunit 12 Gene Polymorphisms in Uterine Fibroids and Breast Fibroadenomas in Senegalese Women", Int. Biol. Biomed. J. Winter vol. 3, 2017, pp. 8-16.
[12] B. Kénémé, D. Ciss, S. Ka, F. Mbaye, A. Dem, M. Sembène, "Uterine fibroids in Senegal: polymorphism of MED12 gene and correlation with epidemiological factors", Am J Can Res Rev", vol. 2, No. 4, 2018, pp. 1-16.
[13] K. Tamura, G. Stecher, D. Peterson, A. Filipski, S. Kumar, "MEGA7: Molecular Evolutionary Genetics Analysis version 7.0", Mol Biol Evol, vol. 30, 2013, pp. 2725-2729.
[14] B. Banaganapalli, K. Mohammed, I. A. Khan, J. Y. Al-Aama, R. Elango, N. A. Shaik, "A computational protein phenotype prediction approach to analyze the deleterious mutations of human MED12 gene", J. Cell. Biochem, vol. 117, 2016, pp. 2023-2035. doi: 10.1002/jcb.25499.
[15] J. Yang, A. Roy, Y. Zhang, "BioLiP: A semi-manually curated database for biologically relevant ligand-protein interactions ", Nucl Acids Res, vol. 41, 2013, pp. 1096-1103, doi: 10.1093/nar/gks966.
[16] A. Roy, Y. Zhang, "Recognizing protein- ligand binding sites by global structural align- ment and local geometry refinement", Structure, vol. 20, 2012, pp. 987-997, doi: 10.1016/j.str.2012.03.009.
[17] T. A. Hall, "BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT", Nucl Acids Symp Ser, vol. 41, 1999, pp. 95-98.
[18] R Development Core Team, "R: A language and environment for statistical computing", R Foundation for Statistical Computing, Vienna, Austria. 2005, ISBN 3-900051-07-0, URL: http://www.R-project.org.
[19] S. Malik, R. G. Roeder, "The metazoan Mediator co-activator complex as an integrative hub for transcriptional regulation", Nat Rev Genet, vol. 11, 2010, pp. 761-772.
[20] E. M. Je, M. R. Kim, K. O. Min, N. J. Yoo, S. H. Lee, "Mutational analysis of MED12 exon 2 in uterine leiomyoma and other common tumors", Int J Cancer, doi: 10.1002/ijc.27610. 2012.
[21] M. A. De Graaff, A. M. Cleton-Jansen, K. Szuhai, J. V. Bovee, "Mediator complex subunit 12 exon 2 mutation analysis in different subtypes of smooth muscle tumors confirms genetic heterogeneity" Hum Pathol, vol. 44, No. 8, 2013, pp. 1597-1604.
[22] C. E. Barbieri, S. C. Baca, M. S. Lawrence, "Exome sequencing identifies recurrent SPOP, FOXA1 and MED12 mutations in prostate cancer". Nat Genet, vol. 44, No. 6, 2012, pp. 685-689.
[23] C. E. Barbieri, A. Sboner, M. A. Rubin, L. A. Garraway, "Mutation in prostate tumours from Caucasian patients", J Pathol, vol. 230, 2013, pp. 453-456.
[24] Y. K. Kang, M. Guermah, C. X. Yuan, R. G. Roeder, "The TRAP/Mediator coactivator complex interacts directly with estrogen receptors alpha and beta through the TRAP220 subunit and directly enhances estrogen receptor function in vitro", PNAS, vol. 99, No. 5, 2002, pp. 2642-2647.
[25] M. Farber, S. Conrad, W. L. Heinrichs, "Estradiol binding by fibroid tumors and normal myometrum", Obstet Gynecol, vol. 40, 1972, pp. 479-486.
[26] P. Rosati, C. Exacoustos, S. Mancuso, "Longitudinal evaluation of uterine myoma growth during pregnancy: a sonographic study", J Ultrasound Med, vol. 1, No. 1, 1992, pp. 511-515.
[27] N. Strobelt, A. Ghidini, M. Cavallone, "Natural history of uterine leiomyomas in pregnancy", J Ultrasound Med, vol. 1, No. 3, 1994, pp. 399-401.
[28] H. M. Bourbon, "Comparative genomics supports a deep evolutionary origin for the large, four module transcriptional mediator complex". Nucleic Acids Res, vol. 36, 2008, pp. 3993-4008.
[29] M. Turunen, J. M. Spaeth, S. Keskitalo, "Uterine leiomyoma-linked MED12 mutations disrupt Mediator associated CDK activity", Cell Rep, vol. 7, No. 3, 2014, pp. 654-660.
[30] T. M. Knuesel, D. K. Meyer, J. A. Donner, J M. J. Espinosa, J. D. Taatjes, "The Human CDK8 Subcomplex Is a Histone Kinase That Requires Med12 for Activity and Can Function Independently of Mediator ", Mol Cell Biol, vol. 29, No. 3, 2009, pp. 650-661.
[31] L. D. Stegink, L. DenBesten, "Synthesis of cysteine from methionine in normal adult subjects. Effect of route of alimentation", Science (Wash. D. C), vol. 178, No. 514, 1972.
[32] A. Barbul, "Arginine: biochemistry, physiology, and therapeutic implications". J. Parent. Ent. Nutr, vol. 10, 1986, pp. 227-238.
Cite This Article
  • APA Style

    Keneme Bineta, Ciss Daouda, Ka Sidy, Dem Ahmadou, Sembene Pape Mbacke, et al. (2019). Prediction of the Structure and Mutations Instability of the Med12 Exon2 Gene in Uterine Fibroids in Senegalese Women. International Journal of Genetics and Genomics, 7(3), 80-87. https://doi.org/10.11648/j.ijgg.20190703.18

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    ACS Style

    Keneme Bineta; Ciss Daouda; Ka Sidy; Dem Ahmadou; Sembene Pape Mbacke, et al. Prediction of the Structure and Mutations Instability of the Med12 Exon2 Gene in Uterine Fibroids in Senegalese Women. Int. J. Genet. Genomics 2019, 7(3), 80-87. doi: 10.11648/j.ijgg.20190703.18

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    AMA Style

    Keneme Bineta, Ciss Daouda, Ka Sidy, Dem Ahmadou, Sembene Pape Mbacke, et al. Prediction of the Structure and Mutations Instability of the Med12 Exon2 Gene in Uterine Fibroids in Senegalese Women. Int J Genet Genomics. 2019;7(3):80-87. doi: 10.11648/j.ijgg.20190703.18

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  • @article{10.11648/j.ijgg.20190703.18,
      author = {Keneme Bineta and Ciss Daouda and Ka Sidy and Dem Ahmadou and Sembene Pape Mbacke and Serigne Magueye Gueye},
      title = {Prediction of the Structure and Mutations Instability of the Med12 Exon2 Gene in Uterine Fibroids in Senegalese Women},
      journal = {International Journal of Genetics and Genomics},
      volume = {7},
      number = {3},
      pages = {80-87},
      doi = {10.11648/j.ijgg.20190703.18},
      url = {https://doi.org/10.11648/j.ijgg.20190703.18},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijgg.20190703.18},
      abstract = {Uterine fibroids are benign proliferations of slow evolution. They are associated with significant morbidity and constitute a real public health problem. Despite the large-scale medical and financial burden posed by uterine fibroids, the functional roles of the various factors and genes involved in their etiology and growth remain unclear. This shows a great need to undertake a study that would evaluate the molecular features of uterine fibroids. It is in this context that our study is based on 50 Senegalese women with uterine fibroids. Samples of tumour tissue and blood were taken from each patient. After sequencing, the raw data was submitted to the Mutation Surveyor software version 5.0.1. Pathogenicity of mutations was evaluated with Polyphen software. To better understand the functional impact of missense mutations at the three-dimensional level, we simulated the structure of the protein by the ab-initio method using the I-Tasser web server. After cleaning, correcting and aligning the sequences with the BioEdit software version 8.0.5, the amino acid frequencies for the blood and tumour tissue samples were retrieved with the MEGA7 software. To see if there is a difference in the distribution of each amino acid between blood and tumour tissue, the average comparison test was performed with the R software version 3.3.1. Our results showed the presence of mutations of the MED12 gene only in tumour tissues. All mutations are predicted to be deleterious. In comparison to the reference sequence, all the mutations show a conformational change in the 3D structure of the MED12 protein. In addition, the mutations p. Q43P, p. G44S, p. G44D, p. G44R, p. F45V, p. K60M give proteins of α-β structure different from the reference sequence which has an α structure. All mutations alter the predicted function of the MED12 protein, which further suggests their involvement in the pathobiology of uterine fibroids in Senegalese women. With regard to amino acid frequencies, the comparison of means between blood and tumour tissue samples shows different distributions for amino acids such as cysteine, aspartic acid, glycine, histidine, leucine, arginine and serine. The results obtained make it possible to better understand the molecular mechanisms involved in the etiology of uterine fibroids. They allow glimpsing applications for the screening of populations at risk, for a non-invasive diagnosis or even for preventive or curative treatment.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Prediction of the Structure and Mutations Instability of the Med12 Exon2 Gene in Uterine Fibroids in Senegalese Women
    AU  - Keneme Bineta
    AU  - Ciss Daouda
    AU  - Ka Sidy
    AU  - Dem Ahmadou
    AU  - Sembene Pape Mbacke
    AU  - Serigne Magueye Gueye
    Y1  - 2019/09/30
    PY  - 2019
    N1  - https://doi.org/10.11648/j.ijgg.20190703.18
    DO  - 10.11648/j.ijgg.20190703.18
    T2  - International Journal of Genetics and Genomics
    JF  - International Journal of Genetics and Genomics
    JO  - International Journal of Genetics and Genomics
    SP  - 80
    EP  - 87
    PB  - Science Publishing Group
    SN  - 2376-7359
    UR  - https://doi.org/10.11648/j.ijgg.20190703.18
    AB  - Uterine fibroids are benign proliferations of slow evolution. They are associated with significant morbidity and constitute a real public health problem. Despite the large-scale medical and financial burden posed by uterine fibroids, the functional roles of the various factors and genes involved in their etiology and growth remain unclear. This shows a great need to undertake a study that would evaluate the molecular features of uterine fibroids. It is in this context that our study is based on 50 Senegalese women with uterine fibroids. Samples of tumour tissue and blood were taken from each patient. After sequencing, the raw data was submitted to the Mutation Surveyor software version 5.0.1. Pathogenicity of mutations was evaluated with Polyphen software. To better understand the functional impact of missense mutations at the three-dimensional level, we simulated the structure of the protein by the ab-initio method using the I-Tasser web server. After cleaning, correcting and aligning the sequences with the BioEdit software version 8.0.5, the amino acid frequencies for the blood and tumour tissue samples were retrieved with the MEGA7 software. To see if there is a difference in the distribution of each amino acid between blood and tumour tissue, the average comparison test was performed with the R software version 3.3.1. Our results showed the presence of mutations of the MED12 gene only in tumour tissues. All mutations are predicted to be deleterious. In comparison to the reference sequence, all the mutations show a conformational change in the 3D structure of the MED12 protein. In addition, the mutations p. Q43P, p. G44S, p. G44D, p. G44R, p. F45V, p. K60M give proteins of α-β structure different from the reference sequence which has an α structure. All mutations alter the predicted function of the MED12 protein, which further suggests their involvement in the pathobiology of uterine fibroids in Senegalese women. With regard to amino acid frequencies, the comparison of means between blood and tumour tissue samples shows different distributions for amino acids such as cysteine, aspartic acid, glycine, histidine, leucine, arginine and serine. The results obtained make it possible to better understand the molecular mechanisms involved in the etiology of uterine fibroids. They allow glimpsing applications for the screening of populations at risk, for a non-invasive diagnosis or even for preventive or curative treatment.
    VL  - 7
    IS  - 3
    ER  - 

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Author Information
  • Department of Animal Biology, Cheikh Anta Diop University, Dakar, Senegal

  • Maternity and Gynecology Obstetrics Service, Grand Yoff Hospital, Dakar, Senegal

  • Joliot Curie Institute, Le Dantec Hospital, Cheikh Anta Diop University, Dakar, Senegal

  • Joliot Curie Institute, Le Dantec Hospital, Cheikh Anta Diop University, Dakar, Senegal

  • Department of Animal Biology, Cheikh Anta Diop University, Dakar, Senegal

  • Urology Department, General Hospital Grand Yoff, Dakar, Senegal

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