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ŞAHİN, ALİ

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ŞAHİN

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    PublicationOpen Access
    Does decision tree analysis predict oral ulcer activity-related factors in patients with Behçet's syndrome?
    (2023-10-01) ÇANDERELİ, ZEHRA ÖZGE; ŞİŞMAN KİTAPÇI, NUR; AKSOY, AYSUN; ŞAHİN, ALİ; ALİBAZ ÖNER, FATMA; İNANÇ, GÜZİDE NEVSUN; DİRESKENELİ, RAFİ HANER; MUMCU, GONCA; ÇANDERELİ Z. Ö., Arslan T., Özdamar Ö., Yay M., Karaçayli Ü., ŞİŞMAN KİTAPÇI N., Adesanya A., AKSOY A., Belem J. M. F. M., Taş M. N., et al.
    OBJECTIVES: The study aimed to identify the interactions among treatment protocols and oral ulcer activity related factors in patients with Behçet\"s syndrome (BS) using the Classification and Regression Tree (CART) algorithm. METHODS: In this cross-sectional study, 979 patients with BS were included from16 centres in Turkey, Jordan, Brazil and the United Kingdom. In the CART algorithm, activities of oral ulcer (active vs. inactive), genital ulcer (active vs. inactive), cutaneous involvement (active vs. inactive), musculoskeletal involvement (active vs. inactive), gender (male vs. female), disease severity (mucocutaneous and musculoskeletal involvement vs. major organ involvement), smoking habits (current smoker vs. non-smoker), tooth brushing habits (irregular vs. regular), were input variables. The treatment protocols regarding immunosuppressive (IS) or non-IS medications were the target variable used to split from parent nodes to purer child nodes in the study. RESULTS: In mucocutaneous and musculoskeletal involvement (n=538), the ratio of IS use was higher in patients with irregular toothbrushing (ITB) habits (27.1%) than in patients with regular toothbrushing (RTB) habits (14.2%) in oral ulcer activity. In major organ involvement (n=441), male patients with ITB habits were more likely treated with IS medications compared to those with RTB habits (91.6% vs. 77.6%, respectively). CONCLUSIONS: Male BS patients on IS who have major organ involvement and oral ulcer activity with mucocutaneous and musculoskeletal involvement have irregular toothbrushing habits. Improved oral hygiene practices should be considered to be an integral part for implementing patient empowerment strategies for BS.
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    PublicationOpen Access
    Fabrication and in vitro characterization of polycaprolactone/graphene oxide/collagen nanofibers for myocardial repair
    (2023-01-01) ULAĞ, SONGÜL; ŞAHİN, ALİ; DUMLUDAĞ, FATİH; GÜNDÜZ, OĞUZHAN; Karapehlivan S. S., Danisik M. N., Akdag Z., Yildiz E. N., Okoro O. V., Nie L., Shavandi A., ULAĞ S., ŞAHİN A., DUMLUDAĞ F., et al.
    This study is focused on fabricating tissue-engineered electrospun nanofibers that contain polycaprolactone (PCL), graphene oxide (GO), and collagen (COL) to get an alternative treatment for cardiac injuries. GO (1.5 wt%) is used to support the contraction-elongation of cardiomyocytes by improving electrical stimulation. The COL (1, 3, and 5 wt%) is the main component of the myocardial extracellular matrix have led to their frequent use in cardiac tissue engineering (CTE). The scanning electron microscope (SEM) images show the homogeneous and bead-free morphologies of the nanofibers. Adding a high amount (3% and 5%) of COL decreases the tensile strength value of 17% PCL/1.5% GO nanofiber. 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) assay demonstrates that the COL addition increases cell viability compared to that in 17% PCL/1.5% GO nanofibers on the third day. The response of the nanofibers to alternating current (AC) signal is studied between the frequencies 40 and 105 Hz. The direct current (DC) conductivity values of the films are determined to be between 1.10−10 and 6.10−10 S m−1 at 25 °C. The AC conductivity values show frequency-dependent behavior. Among the PCL/GO-based electrospun nanofibers, 17% PCL/1.5% GO/5% COL nanofiber shows greater DC and AC conductivity than 17% PCL/1.5% GO nanofiber.