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Sleep Aid herbal formula - natural sleep aid||Herbal Breath - herbs for bad breath problems.||
Weight loss herbal formula||Ginkgo biloba||
Colon cleansing, Laxative for constipation relief, laxative, and colon cleansing||ViaVita, Lecithin for healthy liver
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Neuroscience. 2002;111(3):635-48.
Riluzole rescues cochlear sensory cells from acoustic trauma in the guinea-pig.
Wang J, Dib M, Lenoir M, Vago P, Eybalin M, Hameg A, Pujol R, Puel JL.
INSERM UMR. 254 - Universite de Montpellier 1, Laboratoire de Neurobiologie de l'Audition, 71 rue de Navacelles, 34090 Montpellier, France.
Acoustic trauma is the major cause of hearing loss in industrialised nations. We show in guinea-pigs that sound exposure (6 kHz, 120 dB sound pressure level for 30 min) leads to sensory cell death and subsequent permanent hearing loss. Ultrastructural analysis reveals that degeneration of the noise-damaged hair cells involved different mechanisms, including typical apoptosis, autolysis and, to a lesser extent, necrosis. Whatever the mechanisms, a common feature of noise damage to hair cells was mitochondrial alteration. Riluzole (2-amino-6-trifluoromethoxy benzothiazole) is a neuroprotective agent that prevents apoptosis- and necrosis-induced cell death. Perfusion of riluzole into the cochlea via an osmotic minipump prevents mitochondrial damage and subsequent translocation of cytochrome c, DNA fragmentation, and hair cell degeneration. This was confirmed by functional tests showing a clear dose-dependent reduction (ED(50)=16.8 microM) of permanent hearing loss and complete protection at 100 microM. Although less efficient than intracochlear perfusion, intraperitoneal injection of riluzole rescues the cochlea within a therapeutic window of 24 h after acoustic trauma.These results show that riluzole is able to prevent and rescue the cochlea from acoustic trauma. It may thus be an interesting molecule for the treatment of inner ear injuries.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12031350&dopt=Abstract
Comp Biochem Physiol B Biochem Mol Biol. 2002 Jun;132(2):353-8.
Inhibition of digestive enzyme release by neuropeptides in larvae of Opisina arenosella (Lepidoptera: Cryptophasidae).
Harshini S, Nachman RJ, Sreekumar S.
Department of Zoology, University College, Trivandrum-695 034, Kerala, India.
Leucokinins are a group of structurally related neuropeptides stimulating gut motility and fluid secretion by Malpighian tubule in insects. For studying effect of neuropeptides on digestive enzyme release, empty midgut tubes of larvae of Opisina arenosella ligated at both ends with hair were incubated with Leucokinins (LK I-VIII), LK analogues and Leucopyrokinin (LPK) in a bioassay apparatus at 37 degrees C for 30 min. The lumen contents were subsequently analyzed for digestive enzyme levels. The neuropeptides LK III, FFSWG amide, 122 A[1] WP-2, LPK and 434 [phi2] WP-1 inhibited the release of digestive enzymes, protease and amylase while LK VIII, unique in having tyrosine residue, stimulated protease release. The minimum sequence of amino acids at the C-terminal required for activity of LK peptides was found to be FXSWGamide (X=Asn, His, Ser, or Trp). The N-terminal pyroglutamate residue and proline at the C-terminal may contribute to the inhibitory effect of LPK on digestive enzyme release. The present study reveals for the first time an inhibitory effect for leucokinins and pyrokinin on the release of digestive enzymes from the insect midgut.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12031460&dopt=Abstract
Laryngoscope. 2002 Nov;112(11):2057-61.
Inhibition of the c-Jun N-terminal kinase signaling pathway influences neurite outgrowth of spiral ganglion neurons in vitro.
Bodmer D, Gloddek B, Ryan AF, Huverstuhl J, Brors D.
Division of Otolaryngology, Department of Surgery, University of California San Diego School of Medicine, Veterans Affairs Medical Center, La Jolla 92093, USA.
OBJECTIVES: Inhibitors of the c-Jun N-terminal kinase (JNK) signaling pathway have been demonstrated to protect hair cells of the auditory system and different types of neurons from various insults, and their use for future therapeutic applications has been proposed. In the study, we evaluated the effects of inhibition of the JNK pathway on process outgrowth from spiral ganglion neurons. METHODS: Spiral ganglion explants from rats (postnatal days 3-5) that were cultured on laminin were treated with neurotrophin-3 and/or the JNK signaling pathway inhibitor CEP-11004. Both neurite length and number of the explants were evaluated and statistically analyzed by analysis of variance. RESULTS: Inhibition of the JNK signaling pathway reduced process outgrowth from spiral ganglion explants. The reduction, both in length and number of neurites, was reversed by the application of neurotrophin-3. CONCLUSIONS: The results indicate that an intact JNK signaling pathway is important for process outgrowth of spiral ganglion neurons. However, neurotrophin-3 stimulates process extension by a JNK independent pathway. Our results demonstrate that inhibition of the JNK pathway can have adverse effects on the extension of spiral ganglion neurons, but that the negative effects can be ameliorated by appropriate treatment.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12439181&dopt=Abstract
Hear Res. 2002 Mar;165(1-2):19-29.
Effects of carboplatin on amino acid chemistry in chinchilla cochlear nucleus.
Li Y, Godfrey DA, Godfrey MA, Ding DL, Salvi R.
Department of Otolaryngology - Head and Neck Surgery, Medical College of Ohio, 3065 Arlington Avenue, Toledo 43614, USA.
Carboplatin, a drug widely used against solid head and neck tumors, selectively destroys cochlear inner hair cells and type I auditory nerve fibers in chinchilla. This should affect neurotransmitter chemistry, involving amino acids, where the type I auditory nerve fibers terminate in the cochlear nucleus. Using microdissection combined with high-performance liquid chromatography, amino acid concentrations were mapped in the cochlear nuclei of chinchillas injected intraperitoneally 6-8 weeks earlier with 100 mg/kg carboplatin and in those of control animals. Glutamate concentrations were 23% lower in the anteroventral cochlear nucleus (AVCN) and 40% lower in the posteroventral cochlear nucleus (PVCN) of carboplatin-injected chinchillas as compared to controls, while aspartate concentrations were 18% lower in AVCN and 27% lower in PVCN. Using a fluorometric assay, activities of glutaminase, an enzyme which catalyzes glutamate synthesis, were 30% lower in AVCN and 38% lower in PVCN of carboplatin-injected chinchillas. Concentrations of glutamine, gamma-aminobutyrate, and glycine were also lower in some ventral and dorsal cochlear nucleus regions of treated animals. These changes probably result mainly from both primary and later effects of reduced type I auditory nerve fiber input to the cochlear nucleus.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12031511&dopt=Abstract
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