Ryszard Żaba

Prof. Dr. Ryszard Żaba

orcid

Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

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

Representative Publications

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21 August 2019 in BioMed Research International
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Journal Article
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AMAdam Maciejewski
Adam Maciejewski
MKMichał J. Kowalczyk
Michał J. Kowalczyk
WHWaldemar Herman
Waldemar Herman
ACAdam Czyżyk
Adam Czyżyk
MKMarta Kowalska
Marta Kowalska
KŁKatarzyna Łacka
Katarzyna Łacka
Purpose. Vitamin D, besides its role in calcium-phosphorus metabolism, turned out to play a significant immunomodulating function. Until now four single nucleotide polymorphisms of vitamin D receptor gene (VDR), rs2228570 (FokI), rs1544410 (BsmI), rs7975232 (ApaI), and rs731236 (TaqI), have been studied in autoimmune thyroid disorders, with conflicting results. Another functional polymorphism of the VDR gene, rs11568820 (Cdx2), has been shown to influence the immune system, although it has not been studied for its association with autoimmune thyroiditis to date. Therefore, the study aimed to evaluate the association of these five VDR gene polymorphisms with susceptibility to autoimmune thyroiditis among Caucasian Polish population. A relationship between the studied polymorphisms and selected clinical features of the disease was additionally assessed. Methods. 223 patients with autoimmune thyroiditis and 130 control subjects were enrolled in the study. VDR polymorphisms were studied by PCR-RFLP or TaqMan real-time PCR. Results. Allele and genotype distributions of any of the studied polymorphisms did not differ significantly between patients and controls. Similarly, frequencies of haplotypes derived from rs1544410-rs7975232-rs731236 (BsmI-ApaI-TaqI) polymorphisms were not significantly different in the two studied groups. However, a weak association between rs1544410 (BsmI) or rs7975232 (ApaI) VDR polymorphisms and thyroid volume was found (p = 0.03 and p = 0.04, resp.). Conclusions. Our results suggest that VDR gene is not a major susceptibility factor for autoimmune thyroiditis development, at least in Caucasian Polish population.

1 November 2019 in Reports of Practical Oncology and Radiotherapy
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Closed access
JPJakub Pazdrowski
Jakub Pazdrowski
APAdriana Polanska
Adriana Polanska
JKJoanna Kaźmierska
Joanna Kaźmierska
WBWojciech Barczak
Wojciech Barczak
MSMateusz Szewczyk
Mateusz Szewczyk
ADAleksandra Daſczak-Pazdrowska
Aleksandra Daſczak-Pazdrowska
To present the possibility of non-invasive monitoring of the skin after radiotherapy in regards of epidermal barrier function. Radiodermatitis constitutes 95% of all side effects in patients after radiotherapy. The proper assessment of the severity of radiodermatitis can be determined using semi-quantitative clinical scores [Common Terminology Criteria for Adverse Events v 4.0 (CTCAE)].The most accepted way to analyze the epidermal barrier function is to determine Transepidermal Water Loss (TEWL). In prospective study, we included 16 patients diagnosed with head and neck cancer treated with radiotherapy or concomitant chemoradiation in whom we performed non-invasive assessments of the skin barrier function, including TEWL measurement. The final analysis included 6 patients (4 treated with adjuvant radiotherapy, 2 with radical chemoradiation). Clinical assessment of irradiated skin was based on target lesion score (TLS) and CTCAE v 4.0. The mean TLS score in the middle of irradiation was 1.6 points, after last irradiation it was 2.3 points; 3 months later the mean TLS score was: 0. CTCAE v 4.0 criteria: 2 patients had grade 0, 3 patients - grade 1; 1 patient - grade 2. There were statistically significant differences in TEWL related to irradiated skin in the following time intervals: before vs. in the middle; before vs. day after; in the middle vs. day after; in the middle vs. 3 months after; day after vs. 3 months after. The study showed that radiotherapy causes skin barrier dysfunction in all patients independently of clinical radiodermatitis. The biophysical features of this dysfunction can precede clinical symptoms and they can be assessed by non-invasive and objective methods.

10 November 2013 in Applied Research in Quality of Life
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Journal Article
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BSBeata Szramka-Pawlak
Beata Szramka-Pawlak
Aleksandra Dańczak-PazdrowskaAleksandra Dańczak-Pazdrowska
Aleksandra Dańczak-Pazdrowska
TRTeresa Rzepa
Teresa Rzepa
ASAleksandra Szewczyk
Aleksandra Szewczyk
ASAnna Sadowska-Przytocka
Anna Sadowska-Przytocka
RŻRyszard Żaba
Ryszard Żaba
Despite extensive knowledge about quality of life of people suffering from dermatological diseases, data on patients with morphea are scarce. The aim of our study was to compare the quality of life of healthy controls and morphea patients, as well as to determine the correlation of this variable with the level of dispositional optimism. The study included 47 patients with morphea and 47 healthy controls, matched for gender and age. Cantril’s Ladder and Life Orientation Test-Revised were used to assess the levels of life satisfaction and dispositional optimism, respectively. LoSSI was used for the objective assessment. The anticipated level of life quality and the level of dispositional optimism were statistically significantly lower in morphea patients (p = 0.032 and p = 0.014, respectively) when compared to controls. There were no differences in the assessment of current (p = 0.168) and past (p = 0.318) levels of life quality. Also, we proved that type of morphea did not differentiate the current (p = 0.175), past (p = 0.620) and future (p = 0.356) assessment of the quality of life. In the group of morphea patients there was a statistically significant correlation between the level of dispositional optimism and current (p = 0.002, r = 0.43), as well as anticipated (p < 0.001, r = 0.57) levels of life quality. Current level of life quality of healthy controls and morphea patients is comparable, whereas the latter anticipate their future life situation to be significantly worse than the former. Higher level of life satisfaction correlates with higher level of optimism.

21 October 2023 in Cardiovascular Diabetology
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Journal Article
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KBKlaudia Bogusz-Górna
Klaudia Bogusz-Górna
APAdriana Polanska
Adriana Polanska
Aleksandra Dańczak-PazdrowskaAleksandra Dańczak-Pazdrowska
Aleksandra Dańczak-Pazdrowska
RŻRyszard Żaba
Ryszard Żaba
MSMarta Sumińska
Marta Sumińska
AKAndrzej Kędzia
Andrzej Kędzia
Aims/Hypothesis: The study aimed to assess the usefulness of capillaroscopy and photoplethysmography in the search for early vascular anomalies in children with type 1 diabetes. Methods: One hundred sixty children and adolescents aged 6–18, 125 patients with type 1 diabetes, and 35 healthy volunteers were enrolled in the study. We performed a detailed clinical evaluation, anthropometric measurements, nailfold capillaroscopy, and photoplethysmography. Results: Patients with diabetes had more often abnormal morphology in capillaroscopy (68.60%, p = 0.019), enlarged capillaries (32.6%, p = 0.006), and more often more over five meandering capillaries (20.90%, p = 0.026) compared to healthy controls. Meandering capillaries correlated with higher parameters of nutritional status. In a photoplethysmography, patients with diagnosed neuropathy had a higher percentage of flow disturbance curves (p < 0.001) with a reduced frequency of normal curves (p = 0.050). Conclusions: Capillaroscopic and photoplethysmographic examinations are non-invasive, painless, fast, and inexpensive. They are devoid of side effects, and there are no limitations in the frequency of their use and repetition. The usefulness of capillaroscopy and photoplethysmography in the study of microcirculation in diabetic patients indicates the vast application possibilities of these methods in clinical practice.

LJLucyna Jankowska
Lucyna Jankowska
ZAZygmunt Adamski
Zygmunt Adamski
APAdriana Polańska
Adriana Polańska
MBMonika Bowszyc-Dmochowska
Monika Bowszyc-Dmochowska
Katarzyna Plagens-RotmanKatarzyna Plagens-Rotman
Katarzyna Plagens-Rotman
RŻRyszard Żaba
Ryszard Żaba
Tertiary syphilis is a large diagnostic challenge. It is rarely the case that it affects the skin, bone tissue and the eyes at the same time. The presented case shows that extensive symptomatology of syphilis poses a challenge in making a proper diagnosis in patients whose history does not suspect STDs. The study aims to present the case of a young woman hospitalized with a suspected autoimmune disease, diagnosed with symptomatic late syphilis with involvement of the skin, bones and eyes.

30 March 2020 in Genes
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Journal Article
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JGJustyna Gornowicz-Porowska
Justyna Gornowicz-Porowska
MKMichał J. Kowalczyk
Michał J. Kowalczyk
ASAgnieszka Seraszek-Jaros
Agnieszka Seraszek-Jaros
MBMonika Bowszyc-Dmochowska
Monika Bowszyc-Dmochowska
EKElzbieta Kaczmarek
Elzbieta Kaczmarek
Marian DmochowskiMarian Dmochowski
Marian Dmochowski
Autoimmune blistering dermatoses (ABDs) are characterized by autoantibodies to keratinocyte surface antigens and molecules within the dermal–epidermal junction causing disruption of skin integrity. The affinity of Fc receptors (FcRs) causing an autoimmune response in ABDs may vary based on single-nucleotide polymorphisms (SNPs) in FcRs determining the course of disease. This study aimed to explore the effects of CD16A and CD32A SNPs on the autoimmune response in several ABDs. In total, 61 ABDs patients were investigated. ELISA tests, direct immunofluorescence (DIF), TaqMan SNP Genotyping Assays, and statistical analyses were performed. The CA genotype (composed of allele C and A) of rs396991 in CD16A had a higher affinity for tissue-bound IgG1 in pemphigus and for C3 in subepithelial ABDs, showing statistical significance. The greatest relative risk (odds ratio) was reported for AA (rs396991 of CD16A) and CC (rs1801274 of CD32A) homozygotes. There were no statistically significant differences between certain genotypes and specific circulating autoantibodies (anti-DSG1, anti-DSG3 IgG in pemphigus; anti-BP180, anti-BP230 IgG) in subepithelial ABDs. Our findings indicated that rs396991 in CD16A may be of greater importance in ABDs development. Moreover, FcR polymorphisms appeared to have a greater impact on tissue-bound antibodies detected using DIF than circulating serum antibodies in ABDs.