Ionamin online research references
Cell Tissue Res. 1976 Aug 20;171(2):273-6.
Alterations in peripheral nerves of rats treated with chlorphentermine or with iprindole.
Drenckhahn D, Lullmann-Rauch R.
This study deals with the effects of two amphiphilic lipidosis-inducing drugs (chlorphentermine, iprindole) upon the ultrastructure of peripheral nerves of rats. After prolonged drug treatment the preterminal and terminal axoplasm of motor and sensory nerves within skeletal muscles contain numerous abnormal inclusions (osmiophilic conglomerates, autophagic vacuoles, lamellated bodies). By contrast, the axons within large peripheral nerves are little effected. The present observations are tentatively interpreted as resulting from interference with catabolic processes involved in the normal turnover of axoplasmic constituents at the nerve terminal. The exact pathogenesis and the functional significance of these alterations remain to be elucidated.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=184953&dopt=Abstract
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Cell Tissue Res. 1976 Jul 6;169(4):501-14.
Alterations in the neurohypophysis of rats treated with chlorphentermine or tricyclic antidepressants.
Lullmann-Rauch R.
Rats were treated with several amphiphilic, cationic compounds that are known to cause generalized lipidosis (chlorphentermine, iprindole, 1-chloro-amitriptyline, clomipramine). After prolonged drug treatment the neurohypophysis showed severe morphologic alterations particularly in Herring bodies (HB), perivascular cells, and pituicytes. HBs displayed the following abnormalities: (a) great accumulation of autophagic vacuoles that contained neurosecretory granules (NSG); (b) numerous coarse osmiophilic conglomerates; (c) masses of multilamellated material; (d) reduced numbers of intact NSGs. Perivascular cells accumulated large lamellated inclusion bodies. Pituicytes contained membrane-bound crystalloid inclusion bodies. The noxious effect of chlorphentermine and l-chloro-amitriptyline was more pronounced than that of iprindole and clomipramine. The alterations in perivascular cells and in pituicytes are typical of drug-induced lipidosis. The lesions in HBs are tentatively explained as follows: HBs were previously proposed to be the sites of normally occurring intraaxonal disposal of excess neurosecretory material. The present experimental conditions interfere with this catabolic process. Incomplete digestion of the axo-plasmic constituents due for disposal might result in abnormal accumulation of NSG-containing autophagic vacuoles, osmiophilic conglomerates, and multilamellated material. This eventually leads to degeneration of HBs. The functional implications of the neurohypophysial lesions remain to be elucidated by functional experiments.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=186187&dopt=Abstract
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J Pharm Pharmacol. 1976 Sep;28(9):692-9.
The microsomal N-oxidation of phentermine.
Beckett AH, Belanger PM.
The microsomal N-oxidation of phentermine (Ia) to N-hydroxyphentermine (Ib) and to alpha,alpha-dimethyl-alpha-nitroso-beta-phenylethane (Ic was investigated. Maximum activities were obtained with microsomal (9000 g supernatant and microsomes) fractions of rabbit liver in the presence of an NADPH generating system. Incubation of Ia with hepatic washed microsomes from a phenobarbitone pretreated rabbit increased the formation of Ib and decreased that of Ic but the total amount of N-oxidized metabolites (i.e. Ib + Ic) was not affected. The ratio of the metabolically produced Ic to Ib but not the total amount of N-oxygenated metabolites varied greatly depending of the liver microsomal fractions used in the incubation mixtures of Ia; more Ib was produced from Ia using 9000 g supernatant and conversely, more Ic was formed using the washed microsomes of the same liver. The nitroso compound (Ic) was metabolically reduced to Ib and Ib to Ia by the hepatic 9000 g supernatant and soluble fraction; under the same conditions, washed microsomes had only limited reductive properties towards Ic and Ib. N-Hydroxyphentermine (Ib) was not metabolically oxidized to Ic when incubated with washed microsomes from rabbit liver. The use of known carbon-oxidation inhibitors showed that cytochrome P-450 is not involved in the incorporation of oxygen at the nitrogen centre of Ia. The metabolic characteristics and kinetic behavior of the microsomal N-oxidation of Ia supported a recently proposed mechanism explaining the independent formation of Ib and Ic from a common precursor resulting from metabolic N-oxidation of Ia.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10392&dopt=Abstract
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