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The prevalence of chosen polymorphisms of luteinizing hormone receptor gene in Czech population and patients with ovarian hyperstimulation syndrome
Chrudimská, Jana ; Macek, Milan (advisor) ; Schierová, Michaela (referee)
Ovarian hyperstimulation syndrome (OHSS) is an iatrogenic potentially life-threatening complication of assisted reproduction techniques (ART). It is caused by an increased sensitivity of ovaries to gonadotropins administered during the controlled ovarian hyperstimulation (COH). Thus, the degree of ovarian response can be gently tuned by genetic polymorphisms of gonadotropins and their receptors. The aim of this study is to ascertain the prevalence of polymorphisms Asn291Ser (rs1470652), Ser312Asn (rs2293275) and insLQ (insertion of leucine and glutamine, rs58356637) in the luteinizing hormone chorionic gonadotropin receptor (LHCGR) gene in 102 Czech fertile men, 149 fertile women and 58 patients with serious grade of OHSS. Detection of the Asn291Ser and Ser312Asn polymorphisms was performed using TaqMan SNP Genotyping Assays. The insLQ variation was detected by the capillary electrophoresis with fluorescence-labeled primers. This study ascertained the prevalence of studied variants in Czech fertile population. Obtained results are in concordance with the majority of data from other European populations. There is no difference in prevalence between control-men and control-women. No relation to the development of OHSS was disclosed. The number of analyzed samples is too small for haplotype analysis. These...
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The prevalence of chosen polymorphisms of luteinizing hormone receptor gene in Czech population and patients with ovarian hyperstimulation syndrome
Chrudimská, Jana ; Macek, Milan (advisor) ; Schierová, Michaela (referee)
Ovarian hyperstimulation syndrome (OHSS) is an iatrogenic potentially life-threatening complication of assisted reproduction techniques (ART). It is caused by an increased sensitivity of ovaries to gonadotropins administered during the controlled ovarian hyperstimulation (COH). Thus, the degree of ovarian response can be gently tuned by genetic polymorphisms of gonadotropins and their receptors. The aim of this study is to ascertain the prevalence of polymorphisms Asn291Ser (rs1470652), Ser312Asn (rs2293275) and insLQ (insertion of leucine and glutamine, rs58356637) in the luteinizing hormone chorionic gonadotropin receptor (LHCGR) gene in 102 Czech fertile men, 149 fertile women and 58 patients with serious grade of OHSS. Detection of the Asn291Ser and Ser312Asn polymorphisms was performed using TaqMan SNP Genotyping Assays. The insLQ variation was detected by the capillary electrophoresis with fluorescence-labeled primers. This study ascertained the prevalence of studied variants in Czech fertile population. Obtained results are in concordance with the majority of data from other European populations. There is no difference in prevalence between control-men and control-women. No relation to the development of OHSS was disclosed. The number of analyzed samples is too small for haplotype analysis. These...
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Study of luteinizing hormone's and its receptor's polymorphisms in relation to development of ovarian hyperstimulation syndrome
Chrudimská, Jana ; Macek, Milan (advisor) ; Schierová, Michaela (referee)
Ovarian hyperstimulation syndrome (OHSS) is an iatrogenic complication in an assisted reproduction (ART), which can threaten the life of the patient. It is caused by an increased sensitivity of ovarian receptors to exogenous gonadotrophins during controlled ovarian hyperstimulation (COH) that is necessary for induction more than one oocyte. Treatment for this syndrome is symptomatic hence the emphasis is primarily on the prevention. The purpose of current reproduction genetics is to find risk markers, by which it could be possible to assess the sensitiveness of a hormonal receptor for luteinizing hormone (LH-R) and a receptor for follicle stimulating hormone (FSH-R) just before the start of the therapy. Individualization of the COH would decrease the risk of both, the OHSS, and the risk of canceling the COH through a poor ovarian response. Temporary, only FSH-R genotypes are studied in relation to an increased risk of OHSS and its severity. The aim of further studies is an ascertaining the possible impact of LH-R's and the luteinizing hormone's (LH) genotype on the final ovarian response during COH and other types of hormonal treatment. This bachelor's work summarizes the present knowledge of the possible connection of LH's and LH-R's polymorphisms to OHSS in continuum to findings gained about FSH-R.
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