نتایج جستجو برای: ناحیه hvr iii
تعداد نتایج: 282802 فیلتر نتایج به سال:
We assessed ventilatory patterns and ventilatory responses to hypoxia (HVR) in high-altitude (HA) plateau pikas, repetitively exposed to hypoxic burrows, and control rats. We evaluated the role of neuronal nitric oxide synthase (nNOS) and dopamine by using S-methyl-l-thiocitrulline (SMTC) inhibitor and haloperidol antagonist, respectively. Ventilation (Vi) was measured using a whole body plethy...
The I-allele of the angiotensin-converting enzyme (ACE) gene insertion/deletion (I/D) polymorphism has been associated with performance benefits at high altitude (HA). In n = 142 young males and females of largely Quechua origins in Peru, we evaluated 3 specific hypotheses with regard to the HA benefits of the I-allele: (1) the I-allele is associated with higher arterial oxygen saturation (Sa(O...
To evaluate the possibility that distinct viral quasispecies play a role in the pathogenesis of progressive hepatitis C virus (HCV) infection, we performed a detailed evaluation of HCV quasispecies before and after liver transplantation in five patients infected with HCV genotype 1, three of whom developed severe recurrent hepatitis C and two of whom developed asymptomatic posttransplant infect...
مرغ‌های بومی ایرانی مواد ژنتیکی پایه برای برنامه های اصلاح نژاد محسوب میشوند. انجام برنامه‌های اصلاح نژادی در گام نخست نیازمند شناسایی و حفظ تنوع ژنتیکی این جمعیت هاست. بررسی ژنوم میتوکندری در یک نژاد و مقایسه آن با سایر نژادها میتواند شاخص مناسبی از میزان تنوع موجود در جمعیت مورد بررسی را ارائه دهد. در مطالعه حاضر، به منظور ارزیابی تنوع ژنتیکی مرغان لاری ایران، تعداد 23 قطعه مرغ از منطقه لارست...
گونه های مرغ به طور گسترده در سراسر جهان پخش شده و نقش آنها در جامعه عموماً به عنوان منبع مواد غذایی و یا برای سرگرمی است. مرغ بومی در کشورهای در حال توسعه یک منبع مفید برای شناسایی، ژن جدید در میتوکندری و ژنوم هسته ای فراهم می کند. توالی یابی ژنوم میتوکندری یکی از بهترین و رایج ترین روش ها برای طبقه بندی ژنتیکی جمعیت ها و گونه های نزدیک به هم، بررسی امکان اشتقاق گونه های مختلف از یک جد مشترک، م...
Human respiratory syncytial virus (HRSV) is a major cause of acute lower respiratory tract infections in infants and children worldwide. We performed molecular analysis of HRSV among infants and children with clinical diagnosis of severe pneumonia in four study sites in the Philippines, including Biliran, Leyte, Palawan, and Metro Manila from June 2012 to July 2013. Nasopharyngeal swabs were co...
Many pathogens express a surface protein that binds the human complement regulator factor H (FH), as first described for Streptococcus pyogenes and the antiphagocytic M6 protein. It is commonly assumed that FH recruited to an M protein enhances virulence by protecting the bacteria against complement deposition and phagocytosis, but the role of FH-binding in S. pyogenes pathogenesis has remained...
BACKGROUND Little is known about the transmission of variant hepatitis C virus (HCV) genome through needlestick injuries. METHODS To demonstrate how HCV quasi species are transmitted and adapt to the new host in acute resolving infection, we analyzed the nucleotide and deduced amino acid sequences of the hypervariable region 1 (HVR-1) in the E2 domain of HCV in both the source of the virus ("...
When breathing ambient air at rest at 3,658 m altitude, Tibetan lifelong residents of 3,658 m ventilate as much as newcomers acclimatized to high altitude; they also ventilate more and have greater hypoxic ventilatory responses (HVRs) than do Han ("Chinese") long-term residents at 3,658 m. This suggests that Tibetan ancestry is advantageous in protecting resting ventilation levels during years ...
Although the ventilatory and heart rate responses to hypoxia are known to vary widely among subjects, it is not known how exercise or hypercapnia influence the intersubject variability of these responses. If the intersubject variability increases under such conditions, the inherent response of individuals will have more impact on ventilation and heart rate under a variety of hypoxic conditions ...
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