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)
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)
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)
Alkyl t-butyl esters of Nifedipine (1a) analogues, in which the o-nitrophenyl group at position 4 is replaced by pyridinyl (7), dihydropyridinyl (8-10), or N-methyltetrahydropyridinyl (12), were synthesized and evaluated as calcium channel antagonists using the muscarinic receptor-mediated Ca+2-dependent contraction of guinea pig ileal longitudinal smooth(More)
We recently reported that cholecystokinin (CCK) excited nucleus accumbens (NAc) cells and depressed excitatory synaptic transmission indirectly through gamma-aminobutyric acid (GABA), acting on presynaptic GABAB receptors (Kombian et al. [2004] J. Physiol. 555:71-84). The present study tested the hypothesis that CCK modulates inhibitory synaptic(More)
We and others have previously shown that 12-O-tetracanoylphorbol-13-acetate (TPA), a protein kinase-C (PKC) activator, inhibits TSH-stimulated iodide organification in porcine thyroid cells. However, TPA action may be independent of PKC. To further explore the role of PKC in the regulation of differentiated thyroid function, we studied the effects of the(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)
Activation of protein kinase C (PKC) has been observed following TSH exposure in FRTL-5 thyroid cells. However, PKC exists as a family of isoforms displaying individual characteristics. Recently, Wang et al. identified alpha-, delta-, epsilon-, and zeta-PKC in FRTL-5 thyroid cells chronically exposed to TSH. To determine if these PKC isoforms are regulated(More)