Surveillance of prion protein (PrP9 gene polymorphisms in Turkish native sheep breeds

Uzun, Begüm
Scrapie is an infectious fatal disease of sheep and goats which affects the central nervous system. In the present study, samples of 14 native Turkish sheep breeds (n=655) were analyzed with respect to their polymorphisms of PrP gene (at codons: 136, 141, 154 and 171) and their classical and atypical scrapie risk levels were identified. Turkish sheep are found to have the highest PrP genetic variability with 13 classical scrapie alleles and 14 atypical scrapie alleles compared to all previous studies. Classical scrapie-susceptible and wild-type ARQ allele was found as the most frequent allele in Turkish sheep examined. The most classical scrapie-susceptible allele, VRQ was detected at low frequencies in 5 of the breeds (Çine Çaparı, Dağlıç, Kıvırcık, Karayaka and Gökçeada). One novel allele (TL141HQ) was observed in Sakız breed for the first time in this study. It was found that most of the classical scrapie genotypes belong to R3 risk group, whereas atypical scrapie genotypes belonging to zero (0) and one (1) risk groups were frequently seen in sheep analyzed. In other words, Turkish sheep is found to have intermediate risk of classical scrapie and low atypical scrapie risk, in general. The data from the current study may help to establish a breeding program for classical scrapie control in Turkey and will be beneficial for both the animal and public health in the country. In addition, the outcomes of the study will fill the gap which is present in the geographic distribution data of PrP gene polymorphisms in Eurasia.


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Koyun ve keçilerin inkübasyon süresi uzun, ölümcül, merkezi sinir sistemini etkileyen (nörodejeneratif) bir hastalığı olan skrapi; birçok memeli türünü etkileyen bulaşıcı süngerimsi ensefalopatilerden (Transmissible Spongyform Encephalopathy -TSE) yani prion protein hastalıklarından biridir. Koyunda üç ekzon ve iki introndan oluşan prion protein geninde üçüncü ekzon bölgesinde halen 50’den fazla nokta mutasyonu polimorfizmi (TNP) gözlenmiştir. Ancak, skrapiye direnç / hassasiyeti be...
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Prion diseases are a group of fatal neurodegenerative disorders, characterized by the accumulation of prions in the central nervous system. The pathogenic prion (PrPSc) possesses the capability to convert the host-encoded cellular isoform of the prion protein, PrPC, into nascent PrPSc. The present work aims at providing novel insight into cellular response upon prion infection evidenced by synchrotron radiation infrared microspectroscopy (SR-IRMS). This non-invasive, label-free analytical technique was empl...
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Sareyyüpoǧlu, B.; Gülyaz, G.; Saraç, F.; Uzar, S.; Kabakl, Ö.; Çokçalşkan, C.; Gündüzalp, C.; Uzun, E.A.; Çamlı, Onur (2022-03-01)
There are many infectious animal diseases in Turkey and generally, vaccination is the primarly control strategy to combat them. However, it is difficult to apply all vaccines in a definite peri od i n the fi el d due to l i mi tati ons of the l abor and fi nance. Rapi d vacci nati on and effective use of labor can be possible with the help of simultaneous vaccine administrations. The study aims to show the effects of simultaneous foot-and-mouth disease (FMD), peste des petits ruminants (PPR), sheep pox and ...
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COVID-19 is an infectious disease caused by SARS-CoV-2. The virus was first detected in Wuhan, China in late 2019, and the outbreak was declared a pandemic in January 2020 by WHO, and continues to spread worldwide. As of July 2022, more than 575 million confirmed cases have been detected all over the world, and more than 6 million people died from the disease. One of the most important public health measures in combating the spread of infectious diseases is vaccination. Despite the existence of rapidly deve...
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Multiple sclerosis is a chronic disease characterized by inflammation, demyelination, and axonal damage in the central nervous system. Here, we established an induced pluripotent stem cell (iPSC) line METUi001-A from the peripheral blood mononuclear cells of a 25-year-old male individual with clinically diagnosed Relapsing-Remitting Multiple Sclerosis (RRMS) using the integration-free Sendai reprogramming method. We demonstrated that the iPSCs are free of exogenous Sendai reprogramming vectors, have a norma...
Citation Formats
B. Uzun, “Surveillance of prion protein (PrP9 gene polymorphisms in Turkish native sheep breeds,” M.S. - Master of Science, Middle East Technical University, 2012.