Wandikayi C Matowe

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OBJECTIVES The aim of this study was to measure the attitude and practice of Kuwaiti patients in Kuwait with regard to safe disposal of unwanted medicines. SUBJECTS AND METHODS Three-hundred patients or their family members waiting for prescriptions at public general hospitals in Kuwait completed a questionnaire soliciting their practice with regard to(More)
The major projection cells of the nucleus accumbens (NAc) are under a strong inhibitory influence from GABAergic afferents and depend on afferent excitation to produce their output. We have earlier reported that substance P (SP), a peptide which is colocalized with GABA in these neurons, depresses excitatory synaptic transmission in this nucleus (Kombian,(More)
The peptide cholecystokinin (CCK) is abundant in the rat nucleus accumbens (NAc). Although it is colocalized with dopamine (DA) in afferent terminals in this region, neurochemical and behavioural reports are equally divided as to whether CCK enhances or diminishes DA's actions in this nucleus. To better understand the role of this peptide in the physiology(More)
Substance P (SP) is an undecapeptide that is co-localized with conventional transmitters in the nucleus accumbens (NAc). Its neurochemical and behavioral effects resemble those of cocaine and amphetamine. How SP accomplishes these effects is not known, partly because its cellular and synaptic effects are not well characterized. Using whole cell and(More)
We studied whether TSH or phorbol myristate acetate (PMA) stimulates the hydrolysis of phospholipids, predominantly phosphatidylcholine, via phospholipase D (PLD) in FRTL-5 thyroid cells and whether this occurs as a consequence of protein kinase C (PKC) activation. FRTL-5 thyroid cells were labeled with [3H]myristate followed by incubation with 200 mM(More)
Protein kinase C (PKC) is involved in the alpha1-adrenergic-potentiation of beta-adrenergic stimulated cyclic nucleotide responses in rat pinealocytes. In the present study, the PKC isozymes expressed in rat pinealocytes and their regulation by norepinephrine (NE) were investigated. Western blot analysis identified PKC alpha (a classical PKC isozyme), PKC(More)
We demonstrated previously that TSH activates phospholipase D (PLD) via stimulation of protein kinase C (PKC) in Fischer rat thyroid line (FRTL)-5 thyroid cells. To examine the role of the cAMP pathway in the regulation of PLD, we studied the effects of forskolin (0-100 microM; 30 min) and dibutyryl cAMP (dbcAMP; 0-1 mM; 30 min) on PLD activation. FRTL-5(More)
OBJECTIVES This study set out to determine the roles of protein kinase A (PKA) and protein kinase C (PKC) signalling cascades in substance P- (SP-) mediated synaptic depression in the nucleus accumbens. MATERIALS AND METHODS We used whole-cell patch recording in rat forebrain slices to study the effects of excitatory and inhibitory modulators of PKA and(More)
Activation of protein kinase C (PKC) follows its translocation from the cytosol to an active membrane-bound form. Previously, we demonstrated that only high concentrations of partially-purified bovine thyroid-stimulating hormone (TSH) could translocate PKC in vitro when measured by histone phosphorylation. Measuring PKC by Western blotting, we assessed(More)
A novel group of racemic isopropyl 1,4-dihydro-2,6-dimethyl-3-nitro-4-pyridinylpyridine-5-carboxylate isomers [(+/-)-12-14] were prepared using a modified Hantzsch reaction that involved the condensation of nitroacetone with isopropyl 3-aminocrotonate and 2-, 3-, or 4-pyridinecarboxaldehyde. Determination of their in vitro calcium channel-modulating(More)