National Repository of Grey Literature 32 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
First-trimester screening of pregnancy-related complications using plasma exosomal C19MC microRNAs
Špačková, Kamila ; Hromadníková, Ilona (advisor) ; Daňková, Pavlína (referee)
Pregnancy-related complications such as gestational hypertension, preeclampsia, fetal growth restriction, gestational diabetes mellitus, spontaneous preterm birth, and preterm premature rupture of membranes may have severe consequences for both the mother and the child. The development of reliable early screening methods for pregnancy-related complications has therefore been a long-term goal of obstetrics. New possibilities for prenatal diagnostics have opened with the discovery of circulating microRNAs in maternal plasma. MicroRNAs are short, noncoding, 21 to 23 nucleotides long, single-strand RNAs whose main function is to regulate gene expression. During pregnancy, both common and unique miRNAs are expressed by the placenta, amongst them the miRNAs of the C19MC cluster. Several C19MC miRNAs have been shown to display a different expression profile associated with certain pregnancy-related complications. This thesis identifies the plasma exosomal profiles of six C19MC miRNAs (miR-516-5p, miR-517-5p, miR-518b, miR-520a-5p, miR-520h, and miR-525-5p) in patients in their first trimester of gestation who later developed pregnancy-related complications, and compares them with profiles in patients with normal pregnancies.
Influence of fetal microchimerism on breast carcinoma in mothers
Šůchová, Anna-Marie ; Hromadníková, Ilona (advisor) ; Balounová, Jana (referee)
Fetal microchimerism is a condition where fetal cells are present in the body of the mother, they are transmitted during pregnancy and may persist for several decades after parturition. Their presence affects the immune system of the mother, which is investigated in both autoimmune and tumor diseases. This work, as a literature review, summarizes the current knowledge of the effect of fetal microchimerism on breast carcinomas in mothers, which is one of the most common cancer in women worldwide. It is based on studies that examined the presence of fetal cells in peripheral blood and neoplastic maternal tissues. While the correlation between the presence of fetal microchimerism in peripheral blood and breast cancer suggests a possible protective role, the data on the investigation of the same correlation in neoplastic tissue are not so unambiguous. Some of them suggest a protective role, others have a negative role. Key words - fetal microchimerism, breast carcinoma, pathogenesis, oncology, tumor
Postpartal expression profile of cardiovascular microRNAs with regard to occurrence of pregnancy-related complications - study on mothers 3-10 years after the delivery
Marvanová, Veronika ; Hromadníková, Ilona (advisor) ; Korabečná, Marie (referee)
The aim of this study was to investigate gene expression of cardiovascular miRNAs in peripheral blood of mothers after delivery. MiRNAs are small non-coding RNAs, which significantly modulate posttranscriptional adjustments of mRNA and thus regulate gene expression across biological processess. Dysregulation of miRNAs is associated with many pathological phenomena, thanks that we can use them for diagnosis and potentionaly we can treat these diseases by the manipulation of miRNA gene expression. We examined gene expression of circulating miRNAs associated with cardiovascular diseases, and we investigated, how the expression profile depends on pregnancy course and manifestation of pregnancy-related complications. For this purpose we examined material from 221 mothers 3-10 years after delivery. A group with identical pregnancy-related complication was always compared with a group of mothers after physiological pregnancy. Gene expression of 29 cardiovascular miRNAs in peripheral blood was studied using reverse transcription and quantitative real-time PCR. It was confirmed, that the expression profile of miRNAs differed between pregnancy-related complications and physiological controls. We also confirmed, that the profile of gene expression discovered at mothers 3-10 years after delivery was different...
Study of extracellular placental specific microRNAs in maternal circulation and their utilization in clinical diagnostics of pregnancy-related complications
Kotlabová, Kateřina ; Hromadníková, Ilona (advisor) ; Černá, Marie (referee) ; Korabečná, Marie (referee)
Objectiees: Our etudy inieetigated the poeeible utliiaton of extracellular microRNAAe ae noiel non-iniaeiie biomarkere for diaignoetce of preignancy-related complicatone euch ae igeetatonal hyperteneion (GH), preeclampeia (PE) and fetal igrowth reetricton (FGR). Firet, we identifed appropriate preignancy-aeeociated (placenta epeciifc) microRNAAe in maternal circulaton in preignanciee with normal couree of igeetaton. Then, we quantifed eelected extracellular C19MC microRNAAe in maternal circulaton oiertme in normally proigreeeinig preignanciee. Subeequently, we compared C19MC microRNAA expreeeion proiflee in maternal circulaton between preignanciee with clinically eetabliehed preignancy-related complicatone (PE, FGR, GH) and igeetatonal-aige-matched controle. Finally, monitorinig of eelected placenta epeciifc C19MC microRNAAe in maternal circulaton within the ifret trimeeter of igeetaton wae performed with the aim to identfy extracellular C19MC microRNAAe able to diferentate between normal preignanciee and thoee at riek of eubeequent deielopment of preignancy- related complicatone. Reeultes: The leiele and expreeeion proiflee of extracellular placental epeciifc microRNAAe in circulaton of non-preignant indiiiduale and preignant women were performed ueinig real- tme RT-PCR. The eelecton of...
The expression profile of cardiovascular disease associated microRNAs in pregnancies with clinical manifestation of gestational hypertension, preeclampsia and intrauterine growth restriction
Bohatá, Jana ; Hromadníková, Ilona (advisor) ; Korabečná, Marie (referee)
MicroRNA (miRNA) are small non-coding 21-23 nucleotides long one strand RNAs. They are among the major posttranscriptional regulators of gene expression that regulate both physiological and pathological processes. Some of microRNAs, amount of their expression respectively, are specific only for certain type of tissue or pathological condition. The hypothesis for my diploma thesis was that gene expression of 28 cardiovascular disease associated microRNAs (miR-1-3p, miR-16-5p, miR-17-5p, miR- 20a-5p, miR-20b-5p, miR-21-5p, miR-23a-3p, miR-24-3p, miR-26a-5p, miR-29a-3p, miR-92a-3p, miR-100-5p, miR-103a-3p, miR-125b-5p, miR-126-3p, miR-130b-3p, miR-133a-3p, miR-143-3p, miR-145-5p, miR-146a-5p, miR-181-5p, miR-195-5p, miR- 199a-5p, miR-210-3p, miR-221-3p, miR-342-3p, miR-499a-5p, miR-574-3p) would differ in umbilical cord blood between groups of women with physiological pregnancies (FG), gestational hypertension (GH), preeclampsia (PE) and fetal growth restriciton (FGR). The studied cohort consisted of 184 pregnant women involving 44 controls, 47 GH pregnancies, 56 PE pregnancies and 37 FGR pregnancies. Relative quantification of microRNAs was performed by quantitative real-time PCR. Results showed a trend to miR-195-5p down-regulation in umbilical cord blood of GH patients. On the other hand, mild PE...
Relation between cardiovascular microRNAs and pregnancy-related complications
Dalecká, Linda ; Hromadníková, Ilona (advisor) ; Daňková, Pavlína (referee)
During the pregnancy, there are many complications, which can affect a fetal development and eventually, its or mother's life. Pre-eclampsia is one of these complications. It is a hypertensive disorder, which appears during the pregnancy. Another example of these complications is an intrauterine growth restriction. It is a condition, when the fetus is not able to reach its genetical growth potential. Both of those pathological disorders are accompanied by changes in microRNA gene expression in placenta, for example miR-16, miR-21, miR-210. Knowledge about these changes in gene expression could represent unique instruments in the field of noninvasive prenatal diagnosis of these disorders. This could be benefitial due to the fact, that both of these disorders are responsible for increasing maternal and perinatal morbidity and mortality. This work focused on microRNAs, their expression in aformentioned disorders and benefits, which could bring in diagnostics. In this work these two disorders, characteristics of microRNAs and their biogenesi are described. MicroRNAs are interesting for us as potential biomarkers for noninvasive prenatal diagnostics becouse they are present in body fluids, such as plasma, breast milk or amniotic fluid and they are not subject of rapid degradation. Key words:...
The Role of Heat Shock Proteins in Pathogenesis of Placental Insufficinecy
Slabá, Kristýna ; Hromadníková, Ilona (advisor) ; Černý, Jan (referee)
Heat shock proteins (Hsp) are highly conserved proteins that are part of the universal stress response of the cell. Their main function is to protect cells against structural and functional damage. Organisms exposed to different forms of stress, such as e.g. a lack of nutrients or water, hypoxia, infection or inflammation, demonstrated an increased gene expression of these proteins. Pregnancy complications cause stress conditions for maternal and fetal organism, which may result in an increased gene expression of Hsp. In my thesis, I examined the concentration of extracellular mRNA for five different heat shock proteins (Hsp27, Hsp60, Hsp70, Hsp90, HspBP1) in the plasma of pregnant women and wheather this concentration is affected by possible pregnancy complications (preeclampsia, fetal growth restriction and gestational hypertension). I also investigated a possible correlation between mRNA plasma concentration for Hsp and pulsatility index values (PI) obtained by Doppler ultrasound. This research should help to invent a new predictive method for pregnancy complications, based on a detection of specific biomarkers in the first trimester of pregnancy. The research was conducted on plasma samples obtained from peripheral blood of pregnant women, whose collection was performed during clinical manifestations of...
Study of placental specific microRNA expression in pacients with spontaneous preterm birth and preterm prelabor rupture of membranes
Vintrová, Iva ; Hromadníková, Ilona (advisor) ; Daňková, Pavlína (referee)
MicroRNAs (miRNAs) are small non-coding RNAs with a length of 18 to 25 nucleotides playing a pivotal role in post-transcriptional regulation of gene expression. There are miRNAs whose expression is limited to a certain tissue type and diseases which are characterized by a unique miRNA expression profile. I assumed spontaneous preterm birth (PTB) and preterm prelabor rupture of membranes (PPROM) would be characterized by a unique miRNA expression profile. I observed the gene expression of 15 placental specific miRNAs (miR-512-5p, miR-515-5p, miR-516b-5p, miR-517-5p, miR-518b, miR-518f-5p, miR-519a-5p, miR-519d-3p, miR-519e- 5p, miR-520a-5p, miR-520h, miR-524-5p, miR-525-5p, miR-526a and miR-526b-5p) in placental tissue of pacients with PTB, PPROM and women with term in labor pregnancies (FG). PTB group consisted of 24 pacients, PPROM group of 75 pacients and FG group of 20 pacients. Quantitative real-time PCR was used to quantify gene expression. In the group of PTB pregnancies I identified 3 significantly upregulated miRNAs (miR-516b-5p, miR-519d-3p and miR-524-5p) and 4 miRNAs (miR-518b, miR-519a-5p, miR-520h and miR-526a) with a trend to upregulation compared to controls (FG). In the group of PPROM pregnancies I identified 3 miRNAs (miR-519d-3p, miR-520h and miR-256b-5p) with a trend to...
The role of microRNAs in pathogenesis of placental insufficiency - related pregnancies
Fárková, Eva ; Hromadníková, Ilona (advisor) ; Korabečná, Marie (referee)
MicroRNAs (miRNAs) are small noncoding RNAs of length ranging from 18 to 25 nucleotides that regulate gene expression at posttranscriptional level. Expression of some miRNAs is tissue specific. This task assumed that placental insufficiency related pregnancy complications may be characterised by the dysregulation of microRNAs that are crutial for the regulation of cardiovascular system and cardiovascular diseases. The gene expresion of 32 cardiovascular miRNAs was studied in two types of biological material - placental tissue and maternal whole peripheral blood. Patient cohort of clinically manifested preeclampsia (PE), gestational hypertension (GH) and intrauterine growth restriction (IUGR) was compared with samples derived from normal pregnancies (FG). In total, 127 placental tissue samples (20 FG, GH 20, 20 IUGR , 67 PE) and 80 maternal whole peripheral blood samples (20 FG, GH 20, 20 IUGR , 20 PE) were processed. Before the research, two pilot studies focused on the selection of endogenous controls for data normalization of gene expression in both types of biological material were performed. Detection and quantification was carried out by quantitative real-time PCR. In a group of placental tissue several miRNAs showed elevated levels in GH (miR-1, miR-16, miR-17, miR-20a, miR-21, miR-23a,...

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