Ionamin online research references
Neuropharmacology. 1986 Oct;25(10):1111-7.
Mitochondrial alterations in the brain of the rat caused by chlorphentermine.
Zychlinski L, Montgomery MR.
The effects of chlorphentermine on the bioenergetics and activity of monoamine oxidase in mitochondria from the brain of the rat were examined. Oxidation rates of glutamate and succinate were investigated in the presence of chlorphentermine (0.1-5.0 mM). In small concentrations (0.1-1.0 mM), chlorphentermine decreased the respiratory control ratio and the adenosine diphosphate oxygen (ADP/O) ratio, and stimulated state four respiration. State three respiration and the uncoupled state were also decreased, but to a lesser degree. In the presence of larger concentrations of chlorphentermine (1.0-5.0 mM), the respiration in states four, three, and in the uncoupled state, as well as the respiratory control ratio and ADP/O ratio, were decreased significantly. These data indicate that chlorphentermine functions as an uncoupler of oxidative phosphorylation. Oxidation of norepinephrine, serotonin, octopamine, tyramine and dopamine by monoamine oxidase (MAO), an enzyme marker of the outer mitochondrial membrane, was inhibited in the presence of 0.01 to 0.1 mM of chlorphentermine. Oxidation of tryptamine and benzylamine was unaffected. A kinetic study of the oxidation of serotonin in the absence and presence of chlorphentermine (0.025-0.1 mM) indicated that both the Vmax and Km were affected. This drug is an inhibitor of monoamine oxidase of mitochondria of the brain with mixed type inhibition. These combined data show that chlorphentermine affects biochemical processes in both inner and outer mitochondrial membranes.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3785579&dopt=Abstract
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Drug Metab Dispos. 1979 Mar-Apr;7(2):65-9.
The metabolism of N-hydroxyphentermine by rat liver microsomes.
Sum CY, Cho AK.
N-Hydroxyphentermine is oxidized to 2-methyl-2-nitro-1-phenylpropane by rat liver microsome preparations. This oxidation accounts for differences noted in levels of N-hydroxyphentermine formed from phentermine in washed and unwashed microsome preparations. The reaction is inhibited by hemoglobin and catalase, whose presence in unwashed microsomes could terminate the N-oxidation of phentermine at the hydroxylamine level. The hydroxylamine-nitro-oxidation appears to be dependent on cytochrome P-450, as the reaction was induced by phenobarbital pretreatment and inhibited by carbon monoxide and 2,4-dichloro-6-phenylphenoxyethylamine.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=38075&dopt=Abstract
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Nucl Med Commun. 1985 Jan;6(1):49-56.
Synthesis and evaluation of p-iodo-phentermine (IP) as a brain perfusion imaging agent.
Kizuka H, Elmaleh DR, Brownell GL, Strauss HW, Hanson RN.
p-(123I and 131I)iodo alpha,alpha-dimethylphenethylamine (p-iodophentermine, IP) as the alpha-methylated analogue of iodoamphetamine has been prepared. It is hoped that this methyl substitution will increase the lipophilicity of the agent, enhance resistance to metabolism by monoamine oxidase, and will result in increased initial uptake and slower washout from the brain as compared to N-isopropyl-p-(123I)iodoamphetamine. IP was prepared by diazotization of p-aminophentermine followed by decomposition of the diazonium salt with KI. Radioiodinated IP was prepared either by the solid-phase isotopic exchange reaction or by decomposition of the piperidinotriazene derivative with a radiochemical yield of 40-60%. Biodistribution of 131I-IP in rats showed brain uptake in the range of 1.7% dose g-1 at 5, 30 and 60 min. Imaging studies with 123I-IP in dogs showed high brain extraction and slow washout of activity.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3843616&dopt=Abstract
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