Results | Andrology Laboratory | Institutes and Laboratories | Structure | Research Organisation | Research | Riga Stradiņš University

Contact details

16 Dzirciema Str., Rīga, LV-1007

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Results

  • Google plus

Projects

Grants by the Latvian Council of Science

  • Latvian Council of Sciences grant No. 04.1219. “Importance of sperm chromatin structure in male fertility: assessment methodology and dependence on the environmental, lifestyle-related, and genetic factors”. Duration: 2004–2008
  • Latvian Council of Sciences grant No. 233/2012 “Importance of functional diagnostics of plasma membrane Ca2+ ATPase 4 in male infertility”. Duration: 2013–1016

Market-oriented Research of the Ministry of Education and Science

  • TOP No. 04-01 project “Importance of selenium in prophylaxis and treatment of male infertility in Latvia”. Duration: 2004–2005
  • TOP No. 06-21 project “Development of new methods for diagnosing male infertility”. Duration: 2006–2009

EU Framework Programme projects

  • EU 5-FP project No. QLK4-1999-01422 “Envir.Reprod.Health”. Duration: 2002–2004. Result: Study of reproductive parameters and factors affecting it of young males from the general Latvian population.

Publications

2013

  • M. Punab, M. Grigorova, O. Poolamets, S.Sober, V.Vihlajev, B. Zilaitiene, J. Erenpreiss, V. Matulevicius, I. Tsarev, M. Laan. Study in 1790 Baltic men: FSHR Asn680Ser polymorphism affects total testes volume. Andrology, 2013, 1(2):293-300.

2012

  • M. Buividaite, J. Erenpreiss. The effect of treatment with antioxidants/vitamīns/aminoacids on semen quality in idiopathic infertile males. Journal of Reproductive Medicine and Endocrinology, Vol. 9, N 5, 2012, P28, p.366. Abstracts of the 7th European Congress of Andrology (Berlin, Germany, Nov 28 – Dec 1).

2011

  • Grigorova, M, Punab, M, Zilaitiene, B, Erenpreiss, J, Ausmees, K, Matulevicius, V, Tsarev, I, Jorgensen, N, Laan, M.: Genetically Determined Dosage of Follicle-Stimulating Hormone (FSH) Affects Male Reproductive Parameters. J. Clin. Endocrinol. Metab. Vol. 96, pp. E1534-E1541, 2011
  • I. Tsarev, J. Erenpreiss. Cytochemical tests for sperm chromatin maturity. In: Zini A, Agarwal A, eds, Sperm Chromatin: Biological and Clinical Applications in Male Infertility and Assisted Reproduction, New York, Springer, 2011, pp. 181-188.
  • Puzuka, A., Pronina, N, Grinfelde, I, Erenpreiss, J, Lejing, V, Bars, J, Pliss, L, Pelnena, I, Baumanis, V, Krumina, A.: Y chromosome-a tool in infertility studies of Latvian population. Russ. J. Genet. Vol. 47, pp. 347 - 353, 2011.
  • J. Erenpreiss, I. Tsarev. Differences in epigenetic regulatory mechanisms between fertile and infertile men. Fertility&Sterility, Vol. 96, N 3, Suppl. 1 (2011, Sept.), p. S167. Abstracts of the American Society for Reproductive Medicine 67th Annual Meeting (Orlando, Florida, USA, Oct. 15-19, 2011).
  • A. Puzuka, J. Erenpreiss, N. Pronina, et al. Evaluation of molecular aspects of male infertility in the Latvian population. In Vivo: International Journal of Experimental and Clinical Pathophysiology and Drug Research, Vol. 25, N 3, (2011, May-June), pp. 554-555. Abstracts of the 4th International Congress of Molecular Medicine (Istanbul, Turkey, June 27-30, 2011).

2010

  • Erenpreiss, J, Tsarev, I.: Comparison of global sperm DNA methylation in fertile and infertile men: preliminary results. Int. J. Androl. Vol. 33, pp. 49 - 49, 2010
  • Tsarev, I, Erenpreiss, J.: Global sperm DNA methylation compatison in fertile and infertile men: Preliminary results. Eur. Urol. Suppl. Vol. 9, pp. 540 - 541, 2010
  • Pozarskis, A, Erenpreiss, J, Pozarska, J.: Prevalence of late onset hypogonadism in Latvia: A preliminary study. J. Sex. Med. Vol. 7, pp. 219 - 219, 2010
  • Pozarskis A., Erenpreiss J.: Late-onset hypogonadism: Review of the problem. Proceedings of the Latvian Academy of Sciences, Section B: Natural, Exact, and Applied Sciences Vol. 64, pp. 93 - 97, 2010
  • A. Puzuka, N. Pronina, J. Erenpreiss, V. Lejins, L. Pliss, V. Baumanis, A. Krumina. Y chromosome microdeletion and haplogroup patterns in Latvian population. 4th Utah/Florence Symposium on the Genetics of Male Infertility, 4-6 February, 2010, Utah, USA. Abstracts, p. 55.

2009

  • Tsarev, I, Bungum, M, Giwercman, A, Erenpreisa, J, Ebessen, T, Ernst, E, Erenpreiss, J: Evaluation of male fertility potential by Toluidine Blue test for sperm chromatin structure assessment. Hum. Reprod. Vol. 24, pp. 1569 - 1574, 2009
  • Mahfouz, RZ, Sharma, RK, Said, TM, Erenpreiss, J, Agarwal, A: Association of sperm apoptosis and DNA ploidy with sperm chromatin quality in human spermatozoa. Fertil. Steril. Vol. 91, pp. 1110 - 1118, 2009

2008

  • Erenpreiss, J, Elzanaty, S, Giwercman, A.: Sperm DNA damage in men from infertile couples. Asian J. Androl. Vol. 10, pp. 786 - 790, 2008
  • Erenpreiss, J, Tsarev, I, Giwercman, A., Giwercman, Y: The impact of androgen receptor polymorphism and parental ethnicity on semen quality in young men from Latvia. Int. J. Androl. Vol. 31, pp. 477 - 482, 2008
  • Puzuka, A, Krumina, A, Prane, I, Grinfelde, I, Pronina, N, Lejins, V, Erenpreiss, J, Baumanis, V: Incidence of Y chromosomal microdeletions and CFTR gene mutations in infertile males in Latvia. FEBS J. Vol. 275, pp. 100, 2008
  • Pozarskis, A, Erenpreiss, J: The epidemiology peculiarity of the premature ejaculation in the territory of Latvia, generating factors and the medical treatment possibilities. J. Sex. Med. Vol. 5, pp. 132 - 132, 2008

2007

  • Elzanaty, S, Erenpreiss, J, Becker, C: Seminal plasma albumin: origin and relation to the male reproductive parameters. Andrologia Vol. 39, pp. 60 - 65, 2007
  • Bungum M, Humaidan P, Axmon A, Spano M, Bungum L, Erenpreiss J, and     Giwercman A. Sperm chromatin conformation measurment predicts the outcome of ART. Hum Reprod, 2007, 22:1 74-9.
  • A. Puzuka, A. Krumina, J. Erenpreiss et al. Analysis of Y-chromosomal microdeletions and polymorphism of CFTR gene in infertile males – a study from Latvian population. Dosjagnenja i problemi genetiki, selekcii ta biotehnologii (sbornik nauchnih trudov). Kiiv, 2007 – T.1, 575-578.
  • Mahfouz, R, Agarwal, A, Said, TM, Erenpreiss, J, Giwercman, A, Sharma, R: Evaluation of fertility potential by toluidine blue test and the sperm chromatin structure assay. Fertil. Steril. Vol. 88, pp. S301 - S301, 2007
  • D. Ungurjana, I. Tsarev, A. Silova, J. Orbidans, T. Ebessen, E. Ernst, A. Skesteris, J. Erenpreiss. Differences in oxidative stress and seminal antioxidative capacity un relation to semen parameters in sperm donors and infertile men. Annual Scientific Conference of Riga Stradins University. March 29-30, 2007. Riga, Latvia. Abstract book, p 59.
  • J. Erenpreiss, I. Tsarev. The impact of parental ethnicity and maternally derived androgen receptor polymorphism on semen quality in young men from Latvia. Annual Scientific Conference of Riga Stradins University. March 29-30, 2007. Riga, Latvia. Abstract book, p 125.
  • A. Pozarskis, J. Erenpreiss. Epidemiological peculiarities, causative factors and treatment options of premature ejaculation in Latvia: a pilot study. Annual Scientific Conference of Riga Stradins University. March 29-30, 2007. Riga, Latvia. Abstract book, p 225.
  • A. Puzuka, A. Krumina, N. Pronina, V. Lejins, J. Erenpreiss, J. Bars, I. Grinfelde. Analysis of Y-chromosomal microdeletions in infertile males. Annual Scientific Conference of Riga Stradins University. March 29-30, 2007. Riga, Latvia. Abstract book, p 251.
  • J. Erenpreiss. Sperm chromatin structure and male infertility. Invited speaker. 2nd Workshop on Reproductive Biomedicine. May 17-19, 2007. Tartu, Estonia. Abstract book, p 17.
  • A. Puzuka, A. Krumina, J. Erenpreiss et al. Microdeletions of AZF region of Y chromosome in infertile males, a study from Latvian population. European Journal of Human Genetics. 2007, Vol. 15, Suppl. 1, 208-209. European Human Genetics Conference 2007, Nice, France, June 16-19.

2006

  • Erenpreiss, J, Bungum, M, Spano, M, Elzanaty, S, Orbidans, J, Giwercman, A: Intra-individual variation in sperm chromatin structure assay parameters in men from infertile couples: clinical implications. Hum. Reprod. Vol. 21, pp. 2061 - 2064, 2006.
  • I. Tsarev, T. Freivalds, J. Orbidans, J. Erenpreiss. Toluidine blue test for precise diagnostic of male infertility. Riga Stradins University 5th Scientific Conference. March 3, 2006, Riga Latvia. Abstract Book, p. 40.
  • I. Tsarev, J. Erenpreisa, T. Freivalds, T. Ebbesen, E. Ernst, M. Bungum, A.       Giwercman, J. Erenpreiss. A new approach to predict male fertility potential       with high precision using Toluidine Blue test: preliminary results. 14th European Workshop on the Molecular and Cellular Endocrinology of the Testis. April 22-26, 2006, Bad Aibling, Germany. Abstract book, II-36.
  • T.M. Said, A. Agarwal, J. Erenpreiss, R. Mahfouz, A. Giwercman, D.P. Evenson. Association of early apoptosis with the nuclear integrity and maturity in different seminal fractions. 62nd Annual Meeting of the American Society for Reproductive Medicine. October 21-25, 2006. New Orleans, Louisiana, USA. P-985.
  • T.M. Said, A. Agarwal, J. Erenpreiss, R. Mahfouz, A. Giwercman, D.P. Evenson. Evaluation of seminal fractions using the Toluidine blue test and sperm chromatin structure assay. 62nd Annual Meeting of the American Society for Reproductive Medicine. October 21-25, 2006. New Orleans, Louisiana, USA. P-986.
  • T.M. Said, R. Mahfouz, J. Erenpreiss, A. Giwercman, R.K. Sharma, A. Agarwal. Association of early apoptosis with the nuclear integrity and maturity in different seminal fractions. 62nd Annual Meeting of the American Society for Reproductive Medicine. October 21-25, 2006. New Orleans, Louisiana, USA. P-988.
  • R. Mahfouz, T.M. Said, J. Erenpreiss, A. Giwercman, D.P. Evenson, A. Agarwal. Comparison of DNA contents of apoptotic sperm cells in neat and     processed semen. 62nd Annual Meeting of the American Society for Reproductive Medicine. October 21-25, 2006. New Orleans, Louisiana, USA. P-989.
  • I. Tsarev, T. Ebbesen, E. Ernst. A. Giwercman, J. Erenpreiss. Toluidine Blue       image analysis cytometry for the prognosis of male fertility potential. IVth       European Congress of Andrology. December 7-10, Toulouse, France. Andrologie, 2006, Vol 16, No 4, PO 066, p.360.
  • J. Erenpreiss, I. Tsarev, A. Giwercman, Y. Giwercman. The impact of androgen receptor polymorphism and parental ethnicity on semen quality in young men from Latvia. IVth European Congress of Andrology. December 7-10, Toulouse, France. Andrologie, 2006, Vol 16, No 4, PO 032, p.338.

Accomplishments

Toluidine blue cytometry test for sperm DNA structure assessment for clarifying diagnosis of male fertility.

andrologijas lab 01


Rīga Stradiņš University, 16 Dzirciema Street, Rīga, LV-1007, Latvia, +371 67409261 (UTC +2), international@rsu.lv