Nedathur Narasimhachari

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This study provides the first evidence for catecholamine synthesis and release in the RAW264.7 cell line, an important macrophage model. Although catecholamines were low in unstimulated cells, activation with lipopolysaccharide (LPS) induced tyrosine hydroxylase (TH) mRNA and increased extracellular norepinephrine and intracellular dopamine within 48 h. The(More)
Dextroamphetamine 30 mg and placebo were administered by mouth in a double-blind randomized cross-over trial to ten subjects. Behavior was assessed and blood samples analyzed for growth hormone (GH), prolactin (PRL), homovanillic acid (HVA), and amphetamine. There was a statistically significant increase in well-being following d-amphetamine as compared to(More)
Cultured murine bone marrow derived mast cells (BMMC) were found to store high levels of dopamine (3753+/-844 pg/10(7) cells) and occasionally produce norepinephrine and epinephrine. The catecholamine synthesis inhibitor, alpha-methyl-para-tyrosine, decreased intracellular catecholamine concentrations, and activation with ionomycin stimulated dopamine(More)
The effect of six acute doses of the dopamine receptor agonist apomorphine on non-human primate social and individual behaviour was studied in a social colony of four adult Stumptail macaques. Apomorphine was administered intramuscularly to 2 monkeys/day in doses ranging from 0.05 to 3.00 mg kg-1 15 min bfefore a 1 h observation period. Apomorphine induced(More)
Keeping biochemical determinations and clinical judgements independent, the authors investigated three aspects of the transmethylation hypothesis. They found that 26 acutely schizophrenic patients were no more likely to have bufotenine or N,N-dimethyltryptamine present in urine or elevated serum indolethylamine N-methyltransferase activity than 10 normal(More)
Acute morphine produced a dose-dependent, naloxone-sensitive, reversible increase in tryptophan hydroxylase activity in low speed supernatants of midbrain, pons-medulla and cerebral cortex but not spinal cord. The increase in cortical enzyme activity was blocked by 6-hydroxydopamine pretreatment, could be reversed in vitro by incubation with alkaline(More)
The behavioral and biological responses to d-amphetamine have been studied extensively in patients with schizophrenia and depression, and to a lesser degree in bipolar affective disorders. Because of theories linking borderline personality disorder to those illnesses, amphetamine, 30 mg, p.o., was administered to eight borderline patients in a double-blind,(More)
Psychological and biological variables were examined in two groups of patients with both depression and pain. The relationship of these variables to severity of pain and to pain threshold was examined in a nontreatment evaluation group (N = 25), and their relationship to relief of pain and depression was examined n a doxepin-treated group (N = 16).(More)
A 10-year-old white girl showed chorea with elevated antibody titers indicative of an earlier group A streptococcal infection. Prior to treatment, cerebrospinal fluid homovanillic acid levels were markedly elevated. Haloperidol caused minimal improvement. She was then treated with reserpine alone, which resulted in remarkable improvement within one week. A(More)
The antipsychotic drug molindone is considered to be atypical in its mode of action and to have mild side effects. Currently no data are available on the range of serum levels of this drug during treatment. By means of a high performance liquid chromatographic technique, serum molindone levels were measured in 14 psychotic patients receiving a wide range of(More)