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Hydrogen sulfide (H₂S), a gasotransmitter, facilitates pain sensation by targeting Ca(v)3.2 T-type calcium channels. The H₂S/Ca(v)3.2 pathway appears to play a role in the maintenance of surgically evoked neuropathic pain. Given evidence that chemotherapy-induced neuropathic pain is blocked by ethosuximide, known to block T-type calcium channels, we(More)
5-Methoxy-N,N-dimethyltryptamine (5-MeODMT) and 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) facilitate motoneuron excitability through 5-HT1C/5-HT2 receptors in rats. Using spinal cord slices prepared from adult rats, we recorded unitary cell discharges, evoked by local stimulation of the adjacent site, extracellularly in the motor nuclei of the(More)
A new delivery formulation (5FU-MS) of 5-fluorouracil (5FU), 5FU incorporated in microspheres composed of poly(glycolide-co-lactide) matrix, has been developed for the treatment of peritoneal carcinomatosis, and is designed to slowly release the incorporated 5FU for 3 weeks. Intraperitoneal 5FU-MS distributed higher concentrations of 5FU to the(More)
The effect of melatonin, para-chlorophenyl alanine (PCPA), gamma-aminobutyric acid (GABA) and dibutyryl-cAMP (d-cAMP) on the photoentrainment of the circadian adrenocortical rhythm was studied by the intrahypothalamic (near the SCN) implantation of a paraffin pellet mixed with each agent, in the rat. 2 weeks after implantation, the rats were moved to a room(More)
A significant increase of urinary Ca and hydroxyproline levels and a decrease of urinary alkaline phosphatase activity were found in 12 schizophrenic patients receiving certain neuroleptic drugs. In these patients, the levels of active metabolites of vitamin D3 were decreased, while the levels of midmolecule parathyroid hormone were within the normal range,(More)
Free-running blood corticosterone rhythms were examined between the 4th and 9th postnatal week in blinded rat pups optically enucleated on day 1. The pups were born of mother rats having a free-running rhythm under constant illumination conditions and then were put under two separate illumination conditions (light - dark cycle and dark - light cycle) under(More)
Previously, we presented in vivo evidence for a physiological significance of cAMP-regulated CFTR Cl(-) channels in Ca(2+)-activated Cl(-) reabsorption in the ductal system of the rat submandibular gland. Here, we address the mechanism by which basal CFTR activation contributes to the transepithelial Cl(-) movement evoked by muscarinic stimulation. The(More)
Mycobacterium avium is an intracellular microorganism that infects and multiplies within macrophages. Cell-mediated immunity plays an important role in host defense, and interleukin (IL)-12, which is produced mainly by macrophages, is critical for its development. In a mouse model of disseminated M. avium infection, genetically susceptible BALB/c mice had(More)
ProTx-I peptide, a venom toxin of the tarantula Thrixopelma pruriens, has been reported to interact with voltage-gated ion channels. ProTx-I reduced Ba(2+) currents through recombinant human T-type voltage-gated Ca(2+) channels, Ca(v)3.1 (hCa(v)3.1), with roughly 160-fold more potency than through hCa(v)3.2 channels. Chimeric channel proteins(More)
We investigated actions of uridine 5'-triphosphate (UTP) in rat aorta, cerebral and mesenteric arteries, and their single myocytes. UTP (≥10 µM) elicited an inward-rectifying current strongly reminiscent of activation of P2X(1) receptor, and a similar current was also induced by α,β-methylene adenosine 5'-triphosphate (ATP) (≥100 nM). UTP desensitized(More)