attention deficit hyperactivity disorder/tyrosine

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Effect of tyrosine on attention deficit disorder with hyperactivity.

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A single-blind study was conducted to evaluate the effect of oral tyrosine on attention deficit disorder (ADD) with hyperactivity in seven outpatient children. Since most biological evidence of ADD supports a norepinephrine or dopamine deficiency, the authors hypothesized that tyrosine, which has

Enzyme which specifically adds tyrosine to the alpha chain of tubulin.

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A posttranslational modification of tubulin with potential significance for the regulation of microtubule assembly or function has been revealed by the discovery of an enzyme (tubulin--tyrosine ligase) which can add a tyrosine residue to the alphachain, apparently through peptide bond linkage to a

An open trial of L-tyrosine in the treatment of attention deficit disorder, residual type.

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To elucidate the role of catecholamines in attention deficit disorder, the authors conducted an open 8-week trial of L-tyrosine in 12 adults with attention deficit disorder, residual type. Eight showed marked to moderate clinical response in 2 weeks; at 6 weeks these eight developed tolerance,

Effect of treadmill exercise on social interaction and tyrosine hydroxylase expression in the attention-deficit/ hyperactivity disorder rats.

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Attention-deficit/hyperactivity disorder (ADHD) involves clinically heterogeneous dysfunctions of sustained attention, with behavioral hyper-activity and impulsivity. The exact underlying mechanisms of ADHD are not known, however, impairment of dopaminergic system in the nigrostriatal pathway was

No Tryptophan, Tyrosine and Phenylalanine Abnormalities in Children with Attention-Deficit/Hyperactivity Disorder.

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BACKGROUND The aim of the current study was to explore the role of aromatic amino acids (AAAs) in blood in relation to attention-deficit/hyperactivity disorder (ADHD). Given their impact on the synthesis of serotonin and dopamine, decreased concentrations of the AAAs tryptophan, tyrosine and

D-tyrosine adds an anti-melanogenic effect to cosmetic peptides.

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D-tyrosine is known to negatively regulate melanin synthesis by inhibiting tyrosinase activity. Here, we further reveal that peptides containing terminal D-tyrosine can reduce the melanin contents of human melanocytes. The addition of D-tyrosine to the terminus of the commercial anti-wrinkle

Effects of an Epithelial Growth Factor Receptor-Tyrosine Kinase Inhibitor Add-on in Stereotactic Radiosurgery for Brain Metastases Originating from Non-Small-Cell Lung Cancer.

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OBJECTIVE This study was aimed at optimizing the treatment of non-small-cell lung cancer (NSCLC) patients who are candidates for stereotactic radiosurgery (SRS) for brain metastases and harbor activating epithelial growth factor receptor (EGFR) mutations. METHODS We retrospectively reviewed the

Novel CoQ10 antidiabetic mechanisms underlie its positive effect: modulation of insulin and adiponectine receptors, Tyrosine kinase, PI3K, glucose transporters, sRAGE and visfatin in insulin resistant/diabetic rats.

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As a nutritional supplement, coenzyme Q10 (CoQ10) was tested previously in several models of diabetes and/or insulin resistance (IR); however, its exact mechanisms have not been profoundly explicated. Hence, the objective of this work is to verify some of the possible mechanisms that underlie its

Saikosaponin A Alleviates Symptoms of Attention Deficit Hyperactivity Disorder through Downregulation of DAT and Enhancing BDNF Expression in Spontaneous Hypertensive Rats.

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The disturbed dopamine availability and brain-derived neurotrophic factor (BDNF) expression are due in part to be associated with attention deficit hyperactivity disorder (ADHD). In this study, we investigated the therapeutical effect of saikosaponin a (SSa) isolated from Bupleurum Chinese DC,

The usefulness of the spontaneously hypertensive rat to model attention-deficit/hyperactivity disorder (ADHD) may be explained by the differential expression of dopamine-related genes in the brain.

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Spontaneously hypertensive rats (SHR) are considered to represent a genetic animal model for attention-deficit hyperactivity disorder (ADHD). In the present studies, we compared the locomotor activity, learning and memory functions of juvenile male SHR, with age- and gender-matched genetic control

Phenylethylaminergic mechanisms in attention-deficit disorder.

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Urinary excretion (24-hr) of beta-phenylethylamine (PEA), phenylacetic acid (PAA), phenylalanine (Phe), and p-tyrosine (Tyr), and plasma levels of PAA, Phe, and Tyr were examined in 18 normal children and 26 children diagnosed as having attention-deficit hyperactivity disorder (ADHD). The results

Tyrosine-1 and threonine-4 phosphorylation marks complete the RNA polymerase II CTD phospho-code.

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Eukaryotic RNA polymerase II (RNAP II) has evolved an array of heptad repeats with the consensus sequence Tyr1-Ser2-Pro3-Thr4-Ser5-Pro6-Ser7 at the carboxy-terminal domain (CTD) of its largest subunit (Rpb1). Dynamic phosphorylation of Ser2, Ser5 and Ser7 residues orchestrates the binding of

Hematopoietic stem cell transplantation in the era of tyrosine kinase inhibitors.

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Until the 1990 s, the treatment of chronic myeloid leukemia (CML) recognized hematopoietic stem cell transplantation as the best treatment for those patients with an available donor. With the advent of imatinib in 2001, this paradigm changed dramatically as this drug provided outstanding and durable

Do CD4 and CD8 control T-cell activation via a specific tyrosine protein kinase?

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The CD4 and CD8 glycoproteins play an important role in T-cell activation by binding to major histocompatibility complex (MHC) class II or class I molecules, respectively, and stabilizing their interactions with the T-cell receptor-CD3 complex during antigen presentation. Recent evidence suggesting

Multi tyrosine kinase inhibitor dasatinib as novel cause of severe pre-capillary pulmonary hypertension?

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BACKGROUND Pulmonary hypertension (PH) is a life-threatening disease with poor prognosis. Encouraging efforts have been made to target the main vasoproliferative aspects of the disease. Promising emerging therapeutics are tyrosine kinase inhibitors such as imatinib. METHODS Here, we discuss the

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