Katarzyna Olszak-Wąsik

Dr. Katarzyna Olszak-Wąsik

orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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10 May 2019 in Nutrients
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Journal Article
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ABAnna Bednarska-Czerwińska
Anna Bednarska-Czerwińska
KOKatarzyna Olszak-Wąsik
Katarzyna Olszak-Wąsik
AOAnita Olejek
Anita Olejek
MCMichał Czerwiński
Michał Czerwiński
Andrzej TukiendorfAndrzej Tukiendorf
Andrzej Tukiendorf
Background: Anti-Müllerian hormone (AMH) is considered to be one of the most significant indicators of women’s fertility. Many studies have shown that vitamin D may modify human reproductive functions; however, the results are conflicting. The composition of follicular fluid (FF) creates the biochemical environment of the oocyte and affects its quality, which later determines the embryo quality. In this study, we aimed to revise with advanced statistical techniques the relationship between AMH and vitamin D in FF. Methods: The study was designed as a prospective single-center study in infertile patients with AMH ≥ 0.7 ng/mL who underwent controlled ovarian hyperstimulation for in vitro fertilization. AMH and vitamin D levels in FF were measured. Next, the standard and advanced statistical (including segmented regression) techniques were applied. Results: We observed a negative linear correlation between levels of AMH in serum and FF and total vitamin D concentrations up to approximately 30 ng/mL; with a statistically significant relationship in FF. Beyond that concentration, the trend was positive but statistically insignificant. Conclusions: As an existing “change-point problem” was noticed, we suggest segmentation in the relationship between vitamin D and AMH during infertility treatment.

26 November 2019 in Oxidative Medicine and Cellular Longevity
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Journal Article
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KOKatarzyna Olszak-Wąsik
Katarzyna Olszak-Wąsik
ABAnna Bednarska-Czerwińska
Anna Bednarska-Czerwińska
AOAnita Olejek
Anita Olejek
Andrzej TukiendorfAndrzej Tukiendorf
Andrzej Tukiendorf
Background. Oxidative stress appears to be involved in oocyte growth and maturation that when impaired results in poor embryo quality and lower potential to implant. The biochemical microenvironment of the oocyte (follicular fluid (FF)) consists of hormones and other various substances regulating the balance between oxidants and antioxidants. Aim. The aim of this study was to examine the possible impact of selected biomarkers (“every day,” hormonal biomarkers, enzymatic and nonenzymatic antioxidants, and also oxidative stress markers) in serum and FF, on embryo quality and pregnancy success in infertile women undergoing infertility treatment. Methods. All 53 patients, mean age 34.7±4.1 years, with serum AMH level≥0.7 ng/mL, were diagnosed with idiopathic infertility. They were stimulated in short antagonist protocol, followed by in vitro fertilization (IVF-ICSI intracytoplasmatic sperm injection) and a single embryo transfer. Follicular fluid was aspirated from the first mature follicle. In statistical analyses the R software was used, then all data was assessed with the Shapiro-Wilk test, logistic regression, and later the receiver operating characteristic (ROC) curve was applied using “pROC” R package. Results. We did not observe any correlation between AMH and embryo quality and pregnancy rate. Statistically significant results were only found for biomarkers examined in follicular fluid. Greater levels of GPX in FF were associated with the increased chance of producing a high quality embryo (the optimal cut-off concentration was established at over 450 lU/L.) Regarding pregnancy success, increasing levels of GR (cut-off at 21 IU/L), CuZnSOD (cut-off at 9NU/mL), and GST (cut-off at 2.5 IU/L) resulted in lower chances of a successful pregnancy. Conclusion. Our results indicate that FF markers may have some advantages in predicting embryo quality and pregnancy over AMH. The GPX system seems to be mostly related to embryo quality and pregnancy.

19 May 2016 in PLOS ONE
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Journal Article
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ANAndrzej Nowakowski
Andrzej Nowakowski
MCMarek Cybulski
Marek Cybulski
IBIrmina Buda
Irmina Buda
IJIwona Janosz
Iwona Janosz
KOKatarzyna Olszak-Wąsik
Katarzyna Olszak-Wąsik
WBWłodzimierz Baranowski
Włodzimierz Baranowski
A population-based organised cervical cancer screening programme (OCCSP) was introduced in Poland in 2006. In this study we have aimed to analyse whether selected parameters related to invasive cervical cancer (ICC) of patients diagnosed in two distant gynaecological oncology centres changed after the first screening round of the programme run between 2006–2008. We have run a retrospective cross-sectional analysis of 189 women diagnosed with ICC between 2002–2005 (directly before introduction of the programme) and 165 patients diagnosed between 2009–2012 (just after the first screening round of the programme) and compared their age at diagnosis, histology, stage of tumours and overall survival (OS). Mean age of patients diagnosed in years 2002–2005 and 2009–2012 was 52.1 and 52.6 years respectively. Squamous cell carcinomas constituted 90.5% and 86.1% of tumours diagnosed in years 2002–2005 and 2009–2012 respectively and the rest of tumours had glandular and other histologies. 74.5% and 61.0% of women diagnosed in years 2002–2005 and 2009–2012 respectively had early ICC (FIGO—International Federation of Gynaecology and Obstetrics stages I-IIA) and the rest had advanced disease (FIGO IIB-IV). We have noticed no significant differences in mean age of patients, histology of tumours and OS of patients with ICC diagnosed before and after the first screening round of OCSSP in Poland. Advanced stages of ICC were more commonly diagnosed after the introduction of OCSSP. Changes only in some clinical parameters of patients with ICC were noticed before and after the first screening round of OCSSP in Poland but OS of patients remained the same.

1 January 2016 in Menopause Review-Przeglad Menopauzalny
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Journal Article
Closed access
AOAnita Olejek
Anita Olejek
KOKatarzyna Olszak-Wąsik
Katarzyna Olszak-Wąsik
ACAnna Czerwinska-Bednarska
Anna Czerwinska-Bednarska
Uterine fibroids are found in almost 20-40% of women of reproductive age. For each woman an individualised treatment method should be applied because the hysterectomy procedure is not a good option in every case. The uterus is an organ necessary not only in reproduction. Its removal may result...

1 January 2013 in Menopause Review-Przeglad Menopauzalny
Verified
Journal Article
Closed access
AOAnita Olejek
Anita Olejek
KOKatarzyna Olszak-Wąsik
Katarzyna Olszak-Wąsik
SKStęplewska Katarzyna
Stęplewska Katarzyna
SHStanisław Horak
Stanisław Horak
JZJacek Zamłyński
Jacek Zamłyński
AGAndrzej Gabriel
Andrzej Gabriel
Background: Lichen sclerosus (LS) is an immune-mediated chronic dermatosis of perimenopausal women. Inflammatory infiltration has been suggested as a potential cause of LS changes in epidermis and dermis. Photodynamic therapy (PDT) is a specific noninvasive treatment based on detection and...

1 March 2012
Verified
Journal Article
Closed access
AOAnita Olejek
Anita Olejek
KOKatarzyna Olszak-Wąsik
Katarzyna Olszak-Wąsik
THTomasz Horzelski
Tomasz Horzelski
LNLeszek Nowak
Leszek Nowak
JZJacek Zamłyński
Jacek Zamłyński
DLDariusz Lange
Dariusz Lange