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    Impact of enriched environment on production of tau, amyloid precursor protein and, amyloid-? peptide in high-fat and high-sucrose-fed rats
    (Cambridge Univ Press, 2017) Selvi, Yavuz; Gergerlioglu, Hasan Serdar; Akbaba, Nursel; Oz, Mehmet; Kandeger, Ali; Demir, Enver Ahmet; Yerlikaya, Fatma Humeyra
    Objective: The Western-type diet is associated with an elevated risk of Alzheimer's disease and other milder forms of cognitive impairment. The aim of the present study was to investigate the effects of the environmental enrichment on amyloid and tau pathology in high-fat and high-sucrose-fed rats. Methods: In total, 40 adult male rats were categorised into two main groups according to their housing conditions: enriched environment (EE, n = 16) and standard housing condition (n = 24). The groups were further divided into five subgroups that received standard diet, high-fat diet, and high-sucrose diet. We performed the analysis of amyloid beta-peptide (A beta) (1-40), A beta(1-42), amyloid precursor protein (APP), and tau levels in the hippocampus of rats that were maintained under standard housing conditions or exposed to an EE. Results: The EE decreased the A beta(1-40), A beta(1-42), APP, and tau levels in high-fat and high-sucrose-fed rats. Conclusion: This observation shows that EE may rescue diet-induced amyloid and tau pathology.
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    Is time of childbirth affected by chronotype of the mother?
    (Taylor & Francis Ltd, 2013) Guler, Ayse; Aydin, Adem; Selvi, Yavuz; Dalbudak, Tuna
    We have investigated if biological rhythms, which affect many physiological and pathological events, influence the time of birth. Two hundred and sixty-three cases who were hospitalized with a diagnosis of active labor and who delivered vaginally were enrolled in the study. Information about the age, gravidity, parity, gestational age on admission, and time of onset of labor and birth was registered. A Morningness-Eveningness Questionnaire (MEQ) was administered for determining the patients' chronotypes and dividing them into a morning- or evening-type group. While 20 (35%) of the morning-types delivered between 18:00 and 24:00h, only 11 (19%) of them delivered between 06:00 and 12:00h. From the evening types, 6 (33%) delivered between 18:00 and 24:00h and 3 (17%) between 06:00 and 12:00h. We conclude that there was no statistically significant difference between the chronotypes in terms of delivery time.