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RISS 인기검색어
- 검색키워드
- 저자 : Jitendra Yadav (검색결과 3 건)
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Yadav Mohit,Rathore Jitendra Singh 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.3
Bacteria have a particular strategy to invade the host immune system by forming an undetectable dormant state that may resuscitate and cause disease even after inhabiting for years in a host body. Several mechanisms are known to be responsible for bacterial dormancy, among them the hipBA toxin-antitoxin (TA) system which was initially identified in Escherichia coli. Here we explore the genomic distribution and functional association of hipBA TA homologs from an entomopathogenic bacterium Xenorhabdus nematophila. This bacterium is a sym biotic model with the nematode Steinernema carpocapsae. We found that HipA toxin homologs are more closely related than HipB antitoxins and have satisfactory adenine (for HipA homologs) and nucleic acid (for HipB homologs) ligand partners with a typical TA interaction network that may promote the X. nematophila towards a stringent response to form the dormant state. Such homologs distribution is an inclusion in the current TA repertoire of X. nematophila.
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Episodes of prolonged “trance-like state” in an infant with hypothalamic hamartoma
Rakesh Kumar,Jaivinder Yadav,Jitendra Kumar Sahu,Manjul Tripathi,Chirag Ahuja,Devi Dayal 대한소아내분비학회 2019 Annals of Pediatirc Endocrinology & Metabolism Vol.24 No.1
Hypothalamic hamartoma (HH) is one of the most common causes of central precocious puberty (CPP) in first few years of life. It can present with either seizures or CPP, although both manifestations coexist in the majority of the children. Gelastic seizures (GS), or laughing spells, are usually the first type of seizures seen in patients with HH. Although a wide variety of seizure types are known to occur in children with HH, GS are most common and consistent seizure type. The clinical presentation of HH may vary with the size and position of the mass, although large tumours typically present with both CPP and seizures. Although CPP can be managed with medical therapy, seizures can be very difficult to treat, even with multiple antiepileptic drugs. Noninvasive gamma knife surgery has been used with some success for the treatment of refractory epilepsy. We present a case of HH with very early onset seizures and CPP. The patient had an atypical form of seizures described by the parents as a "trance-like state" in which the patient had prolonged episodes of unresponsiveness lasting for hours with normal feedings during the episodes. GS occurred late in the course and were refractory to various combinations of antiepileptic drugs. A brain magnetic resonance imaging showed a large sessile HH (>20 mm). Later in the course of the disease, the patient experienced cognitive and behavioural problems. The patient underwent gamma knife surgery at nearly 5 years of age and experienced a modest response in seizure frequency. This case highlights the presentation of HH as a previously unreported seizure morphology described as a prolonged "trance-like state."
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Ching-Wen Tan,Shaw-Yhi Hwang,Ju-Che Lo,Jitendra Yadav,Kaliova Tavou Ravuiwasa 한국응용곤충학회 2011 Journal of Asia-Pacific Entomology Vol.14 No.3
Defensive proteins, such as polyphenol oxidase (PPO) and trypsin inhibitor (TI), are induced by herbivore wounding and exogenous methyl jasmonate application in various plant species. This study was conducted to measure induction of PPO and TI in radish, sweet pepper, tomato, and water spinach plants following herbivore wounding (I), methyl jasmonate application (M), and a combination of the two treatments (M+I). The effect of induced responses was also examined against third instar Spodoptera litura Fab. PPO activity was induced in radish by treatment I only; in sweet pepper, by treatments I and M; in tomato, by treatments I, M,and M+I; and in water spinach, by treatments M and M+I. The activity of TI was enhanced 1.2–1.4-fold in radish, sweet pepper, and tomato by M and M+I treatments, whereas in water spinach, it was enhanced 1.2-fold by all 3 treatments. The relative growth rate (RGR) of S. litura was reduced by 53% on radish plants following M treatment only. It was reduced by 37% and 42% on sweet paper plants following M and M+I treatment, respectively. RGR was significantly reduced on test tomato plants following I, M, and M+I treatments. The RGR of S. litura was unaffected on water spinach plants following any treatment. Collectively,the results of this study indicated that induction of plant defensive proteins in response to S. litura feeding or exogenous methyl jasmonate application varied among plant species, which further affected the induced plant resistance to the caterpillars.
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