Generating salt-tolerant Nicotiana tabacum and identification of stress-responsive miRNAs in transgenics

Identification of vacuolar Na+/H+ antiporters facilitates the basis of salt stress tolerance mechanisms. Na+ accumulation into the vacuole is crucial for the avoidance of cytoplasmic Na+ toxicity. In this study, we show that the introduction of AtNHX1 into tobacco generated more tolerant plants when compared to wild-type plants. Transgenic tobacco plants exhibited higher germination rates in the presence of increasing salt concentrations compared to wild-type plants. In addition, proline levels were higher under salt stress conditions in both the shoots and the roots of transgenics compared to wild-type plants. Increase in malondialdehyde production during lipid peroxidation by salinity was lower in transgenic plants compared to the controls. Being important and newly discovered determiners of plant stress responses, microRNAs (miRNAs) are noncoding small RNAs and essential indicators of plant stress response mechanisms. For further identification of stress responses, the expression levels of growth and abiotic stress-related miRNAs (miR319a, miR319b, miR159b, miR398a, and miR398b) were quantified. miR319a, miR319b, and miR159b expression levels were higher in wildtype plants, and miR319a and miR159b expression was restored in transgenic plants. There was a slight decrease in the expression levels of miR398a and miR398b of wild-type plants. However, the recovery of the miR398a and miR398b expressions was especially significant in transgenic plants. Furthermore, an investigation of miRNAs in transgenic plants can help to understand the stress tolerance mechanisms of the plants

Proton Magnetic Resonance Spectroscopy in Asperger's Syndrome: Correlations with Neuropsychological Test Scores

ozguven, halise/0000-0002-9355-2757; Munir, Kerim M/0000-0002-2404-1806WOS: 000264595300003PubMed: 19306123Objectives: It has been shown that autistic spectrum patients have impaired theory of mind (ToM) performance; however no study has investigated the relationship between ToM performance and brain neurochemistry in these patients. The present study aimed to investigate the correlations between dorsolateral prefrontal cortex (DLPFC) and anterior cingulate cortex (ACC) N-acetyl-aspartate (NAA)/choline (Cho), NAA/creatine (Cr), and Cho/Cr values based on H-1 magnetic resonance spectroscopy and ToM tests. Method: The study sample included 13 adult, right-handed, Caucasian males with Asperger's syndrome (AS) (age range: 17-37 years) and 20 controls matched by age, gender, handedness, and Wechsler Adult Intelligence Scale, Revised (WAIS-R) full-scale IQ scores. Results: AS cases had significantly lower ToM performance. DLPFC NAA/Cho levels were inversely correlated to ToM scores (r = -0.738, P = 0.004). On the other hand, ToM performance improved as DLPFC Cho/Cr increased (r = 0,655, P = 0.015). ACC MRS variables were not significantly correlated with ToM performance in the AS group. No significant correlation was observed between ACC or DLPFC MRS variables and ToM performance in the control group. Discussion: Because NAA/Cho was inversely correlated with ToM performance and Cho/Cr was correlated with ToM performance, it can be suggested that the Cho level was related to better ToM test performance in the AS group. An increase in the Cho peak was associated with an increase in membrane breakdown or turnover The Cho peak was also thought to reflect cellular density and astrocytosis. It is suggested that membrane turnover and astrocytosis might affect cognitive functioning.FIC NIH HHSUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) - USANIH Fogarty International Center (FIC) [D43 TW005807

Cognitive And Behavioral Impairment In Mild Hyperphenylalaninemia

As elevated phenylalanine (Phe) is detrimental to brain functions, determining a safe upper limit of blood Phe is important for initiation of treatment plans and setting Phe targets in hyperphenlalaninemic patients. It is accepted that Phe levels below 360 mu mol/L does not impair brain function and hence does not require treatment. Therefore, we aimed to compare cognitive functions and attention-related problems among healthy children and untreated patients with hyperphenylalaninemia (HPA). This study included 41 hyperphenylalaninemic patients ("all HPA group") aged 6-16 years with untreated blood Phe between 240 and 600 mu mol/L and 29 healthy controls. "All HPA group" was further divided into 2 subgroups according to their lifetime median blood Phe levels as "Phe 360-600 mu mol/L" and "Phe 240-360 mu mol/L" groups. Wechsler Intelligence Scale for Children-IV (WISC-IV), Conners' Continuous Performance Test (CPT), Strength and Difficulties Questionnaire (SDQ) and Schedule for Affective Disorders and Schizophrenia for School-Age Children: Present and Lifetime Version (K-SADS-PL) were performed as a comprehensive neurocognitive, attention and behavioral assessment. The study illustrated that "all HPA" patients had significantly lower scores on all WISC-IV indexes compared to controls, except for Working Memory. Both "Phe 360-600 mu mol/L" and "Phe 240-360 mu mol/L" subgroups had lower Full Scale intelligence quotient (IQ) and Verbal Comprehension scores compared to controls. "All HPA" patients also had longer reaction times and more peer problems than controls, indicating attention deficits and behavioral problems. Since the results demonstrated that children with untreated Phe levels between 240-360 mu mol/L are at higher risk for cognitive and attention-related problems, lowering the "safe" upper Phe level should be considered.WoSScopu

Reliability And Validity Of The Schedule For Affective Disorders And Schizophrenia For School-Age Children-Present And Lifetime Version, Dsm-5 November 2016-Turkish Adaptation (K-Sads-Pl-Dsm-5-T)

Objective: The aim of this study was evaluate the reliability and validity of the Schedule for Affective Disorders and Schizophrenia for School-Age Children-Present and Lifetime Version, DSM-5 November 2016 -Turkish Adaptation (K-SADS-PL-DSM-5-T). Method: A total of 150 children and adolescents between 6 and 17 years of age were assessed with K-SADS-PL-DSM-5-T. The degree of agreement between the DSM-5 criteria diagnoses and the K-SADS-PL-DSM-5-T diagnoses were considered as the measure of consensus validity. In addition, concurrent validity was examined by analyzing the correlation between the diagnoses on K-SADS-PL-DSM-5-T and relevant scales. Interrater reliabilities were assessed on randomly selected 20 participants. Likewise, randomly selected 20 other participants were interviewed with K-SADS-PL-DSM-5-T three weeks after the first interview to evaluate test-retest reliability. Results: The consistency of diagnoses was almost perfect for eating disorders, selective mutism and autism spectrum disorder (K=0.92-1.0), substantial for elimination disorders, obsessive-compulsive disorder, oppositional defiant disorder, generalized anxiety disorder, social anxiety disorder, depressive disorders, disruptive mood dysregulation disorder and attention deficit hyperactivity disorder (K=0.67-0.80). Interrater reliability was perfect for selective mucism (K=1.0), substantial for oppositional defiant disorder, disruptive mood dysregulation disorder, attention deficit hyperactivity disorder, depressive disorders and social anxiety disorder (K=0.63-0.73). Test-retest reliability was almost perfect for autism spectrum disorder (K=0.82), substantial for attention deficit hyperactivity disorder, oppositional defiant disorder, disruptive mood dysregulation disorder, depressive disorders and generalized anxiety disorder (K=0.62-0.78). Conclusion: The results of this study show that the K-SADS-PL-DSM-5-T is an effective instrument for diagnosing major childhood psychiatric disorders including selective mutism, disruptive mood dysregulation disorder and autism spectrum disorder which have recently been added to the schedule.WoSScopu