Fakülteler / Faculties
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Item A Partial Epithelial-Mesenchymal Transition Signature For Highly Aggressive Colorectal Cancer Cells That Survive Under Nutrient Restriction(JOURNAL OF PATHOLOGY, 2024-01-24) Pastorino, Gil A.; Sheraj, Ilir; Oral, Goksu; Gulec Taskiran, Aliye Ezgi; Palmisano, Ralph; Schneider-Stock, ReginePartial epithelial-mesenchymal transition (p-EMT) has recently been identified as a hybrid state consisting of cells with both epithelial and mesenchymal characteristics and is associated with the migration, metastasis, and chemoresistance of cancer cells. Here, we describe the induction of p-EMT in starved colorectal cancer (CRC) cells and identify a p-EMT gene signature that can predict prognosis. Functional characterisation of starvation-induced p-EMT in HCT116, DLD1, and HT29 cells showed changes in proliferation, morphology, and drug sensitivity, supported by in vivo studies using the chorioallantoic membrane model. An EMT-specific quantitative polymerase chain reaction (qPCR) array was used to screen for deregulated genes, leading to the establishment of an in silico gene signature that was correlated with poor disease-free survival in CRC patients along with the CRC consensus molecular subtype CMS4. Among the significantly deregulated p-EMT genes, a triple-gene signature consisting of SERPINE1, SOX10, and epidermal growth factor receptor (EGFR) was identified. Starvation-induced p-EMT was characterised by increased migratory potential and chemoresistance, as well as E-cadherin processing and internalisation. Both gene signature and E-cadherin alterations could be reversed by the proteasomal inhibitor MG132. Spatially resolving EGFR expression with high-resolution immunofluorescence imaging identified a proliferation stop in starved CRC cells caused by EGFR internalisation. In conclusion, we have gained insight into a previously undiscovered EMT mechanism that may become relevant when tumour cells are under nutrient stress, as seen in early stages of metastasis. Targeting this process of tumour cell dissemination might help to prevent EMT and overcome drug resistance. (c) 2024 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.Item Health Literacy In Older Adults Receiving Hemodialysis In Turkey: A Cross-Sectional Study(THERAPEUTIC APHERESIS AND DIALYSIS, 2024-01-10) Ugurlu, Ziyafet; Kav, Sultan; Eler, Cigdem Ozdemir; Kaya, Semiha; Korkmaz, YaseminIntroductionThis study aimed to determine the health literacy level and related factors of older adults receiving hemodialysis treatment.MethodsA cross-sectional study was conducted at the five dialysis centers, using the information form and Turkish Health Literacy Survey-32 (THLS-32). A total of 336 older adults receiving hemodialysis treatment participated.ResultsThe general health literacy score was found to be 25.69 +/- 14.47. Based on the health literacy assessment scores, 62.5% of the participants were in the category of inadequate and limited level of health literacy. The lower level of education, perceived health status, income, and getting help in reading and writing were statistically significant predictors of the health literacy score.ConclusionThe health literacy of older adults receiving hemodialysis treatment was inadequate and limited. Findings of this study emphasize the importance of integrating health literacy assessment in clinical care settings and supporting the health literacy of older adults receiving hemodialysis treatment.Item Subcortical Auditory Processing and Speech Perception in Noise Among Individuals With and Without Extended High-Frequency Hearing Loss(JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH, 2024-05-16) Colak, Hasan; Aydemir, Berfin Eylul; Sakarya, Merve Deniz; Cakmak, Eda; Alniacik, Asuman; Turkyilmaz, Meral DidemPurpose: The significance of extended high -frequency (EHF) hearing (> 8 kHz) is not well understood so far. In this study, we aimed to understand the relationship between EHF hearing loss (EHFHL) and speech perception in noise (SPIN) and the associated physiological signatures using the speech-evoked frequency-following response (sFFR). Method: Sixteen young adults with EHFHL and 16 age- and sex-matched individuals with normal hearing participated in the study. SPIN performance in right speech-right noise, left speech-left noise, and binaural listening conditions was evaluated using the Turkish Matrix Test. Additionally, subcortical auditory processing was assessed by recording sFFRs elicited by 40 -ms /da/ stimuli. Results: Individuals with EHFHL demonstrated poorer SPIN performances in all listening conditions (p < .01). Longer latencies were observed in the V (onset) and O (offset) peaks in these individuals (p <= .01). However, only the V/A peak amplitude was found to be significantly reduced in individuals with EHFHL (p < .01). Conclusions: Our findings highlight the importance of EHF hearing and suggest that EHF hearing should be considered among the key elements in SPIN. Individuals with EHFHL show a tendency toward weaker subcortical auditory processing, which likely contributes to their poorer SPIN performance. Thus, routine assessment of EHF hearing should be implemented in clinical settings, alongside the evaluation of standard audiometric frequencies (0.25-8 kHz).Item Working Memory, Attention Skills, and Language Proficiency in Children with Unilateral and Bilateral Cochlear Implants(JOURNAL OF THE AMERICAN ACADEMY OF AUDIOLOGY, 2024) Dikderi, Cagla; Atak, Hilal B. Ozkan; Yucel, EsraBackground Previous studies observed that children with cochlear implants (CIs) have poor language, working memory, and attention skills. The ability to perform cognitive tasks, such as attention and memory, plays a crucial role in the academic achievement and everyday life of children with hearing impairment. Purpose This study aimed to evaluate and compare the effects of age at the time of implantation and bilateral hearing on cognitive skills, such as language development, working memory, and selective attention, among children with CIs. Research Design Language skills were assessed using the Test of Language Development-Primary: Fourth Edition (TOLD-P:4), working memory using the Visual-Aural Digit Span Test-Revised Form (VADS-R), and selective attention skills using the Stroop Test TBAG Form. Study Sample A total of 58 participants, comprised of 21 children with early unilateral CIs (before 2 years), 18 children with late unilateral CIs (after 2 years), and 19 children with bilateral CIs, between the ages of 6 and 9 years, were included in the study. Data Collection and Analysis According to the age at the time of implantation and whether or not the participant was unilaterally or bilaterally implanted, the mean scores, percentage values, and resultant scores of the participants were calculated using the Mann-Whitney U test. The number of repeated backward digit spans for the VADS-R test, completion times, number of errors and corrections for the Stroop test, raw scores, scaled scores corresponding to raw scores at the relevant age, descriptive terms for the TOLD-P:4 test, and within-group comparisons for all tests were examined. Results There were significant differences in language, working memory, and attention skills between individuals with early and late unilateral cochlear implantation, whereas there were no significant differences in many subtests between individuals with early unilateral and bilateral cochlear implantation. Conclusion These findings demonstrate the importance of early cochlear implantation and bilateral hearing on the development of cognitive processes, such as language development, selective attention, and memory skills, which are important factors that may contribute to children's academic performance and overall success.Item The Effect of Forced-Air Warming in the Cesarean Section on Maternal Hypothermia, Shivering, and Thermal Comfort: A Randomized Controlled Trial(HEALTH CARE FOR WOMEN INTERNATIONAL, 2024)This trial was carried out to investigate the effect of forced air warming in various body areas of women on hypothermia during cesarean delivery. The patients in the study groups (n = 76) were assigned to the full-body warming group, upper-extremity warming group, lower-extremity warming group, and control groups. The intervention groups received forced-air warming 30 min before the surgery and continued until 30 min after surgery. The incidence of hypothermia was significantly higher in the control group than in the other groups at the 60th minute of the operation (p < 0.01). The intervention and control groups showed significant differences in the frequency of shivering at the entrance to the PACU (p = 0.001). Thermal comfort scores have significant difference between the control group and all of the intervention groups (p<.001). It is said that the full-body forced-air warming technique prevents hypothermia, shivering, and thermal discomfort in women Cesarean Section (CS).