A structure-activity relationship study of the affinity of selected imidazo[1,2-a]pyridine derivatives, congeners of zolpidem, for the omega 1-subtype of the benzodiazepine receptor. gamma-Aminobutyric acid(A) receptor subunit expression predicts functional changes in hippocampal dentate granule cells during postnatal development. Ribozyme-mediated reduction of the GABA(A) receptor alpha1 subunit. Comparative effects of melatonin, zolpidem and diazepam on sleep, body temperature, blood pressure and heart rate measured by radiotelemetry in Wistar rats. Ambien online references

Ambien online research references

Acta Pol Pharm. 2001 Jan-Feb;58(1):43-52.
A structure-activity relationship study of the affinity of selected imidazo[1,2-a]pyridine derivatives, congeners of zolpidem, for the omega 1-subtype of the benzodiazepine receptor.

Lange J, Karolak-Wojciechowska J, Wejroch K, Rump S.

Chemistry Department, University of Technology, 3 Noakowskiego Str., 00-664 Warsaw, Poland.

A series of 6-substituted 2-aryl-N,N-dimethylimidazol[1,2-a] pyridine-3-acetamides, congeners of zolpidem and alpidem, was synthesized and tested in vitro for binding with the benzodiazepine receptor in the competition with 3H-zolpidem as an omega 1-selective radioligand. Molecular electrostatic potential (MEP) and the HOMO and LUMO energies were calculated for the compounds by semi-empirical quantum chemistry methods. The lipophilicity parameter of the compounds, expressed as the logarithm of the octanol-water partition coefficient (log P), was calculated; alternatively, standard values of the Hansch hydrophobic substituent constants pi were used. In agreement with earlier investigations on the benzodiazepine receptor ligands with a high preference for the omega 1-subtype, a quantitative correlation of the biological data with molecular parameters has revealed a significant dependence (r = 0.954) of the binding affinity (IC50) on the deepest MEP minimum, in this case associated with the amide carbonyl oxygen atom. The lipophilicity parameters were found to be of lower significance.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11370287&dopt=Abstract

word search insomnia ambien online literature

J Neurochem. 2001 Jun;77(5):1266-78.
gamma-Aminobutyric acid(A) receptor subunit expression predicts functional changes in hippocampal dentate granule cells during postnatal development.

Brooks-Kayal AR, Shumate MD, Jin H, Rikhter TY, Kelly ME, Coulter DA.

Pediatric Regional Epilepsy Program and Joseph Stokes Research Institute of The Children's Hospital of Philadelphia, PA 19104, USA. kayal

word search insomnia ambien online literature

email.chop.edu

Profound alterations in the function of GABA occur over the course of postnatal development. Changes in GABA(A) receptor expression are thought to contribute to these differences in GABAergic function, but how subunit changes correlate with receptor function in individual developing neurons has not been defined precisely. In the current study, we correlate expression of 14 different GABA(A) receptor subunit mRNAs with changes in the pharmacological properties of the receptor in individual hippocampal dentate granule cells over the course of postnatal development in rat. We demonstrate significant developmental differences in GABA(A) receptor subunit mRNA expression, including greater than two-fold lower expression of alpha1-, alpha4- and gamma2-subunit mRNAs and 10-fold higher expression of alpha5-mRNA in immature compared with adult neurons. These differences correlate both with regional changes in subunit protein level and with alterations in GABA(A) receptor function in immature dentate granule cells, including two-fold higher blockade by zinc and three-fold lower augmentation by type-I benzodiazepine site modulators. Further, we find an inverse correlation between changes in GABA(A) receptor zinc sensitivity and abundance of vesicular zinc in dentate gyrus during postnatal development. These findings suggest that developmental differences in subunit expression contribute to alterations in GABA(A) receptor function during postnatal development.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11389177&dopt=Abstract

word search insomnia ambien online literature

Brain Res Mol Brain Res. 2001 Aug 15;92(1-2):149-56.
Ribozyme-mediated reduction of the GABA(A) receptor alpha1 subunit.

Subramaniam JR, Corsi L, Vicini S, Whiting PJ, Neale JH.

Department of Biology, Georgetown University, Washington, DC 20057-1229, USA.

As an approach to understanding the role of the alpha1 subunit of the GABA(A) receptor, ribozymes were designed to reduce expression of this subunit protein by hydrolysis of alpha1 subunit message and antisense inactivation. The ribozyme cleavage sites were selected through homology comparison of all known murine GABA(A) receptor subunits at the amino acid and nucleotide sequence level. Two ribozymes were designed and synthesized: one against the extracellular domain and the other against the cytoplasmic domain. These ribozymes were cloned in a mammalian expression plasmid, pZeoSV2 (+). Cleavage of both extracellular and cytoplasmic domain transcripts by the respective ribozymes was observed when each ribozyme was tested against in vitro transcribed mRNA. The stable cell line, 122, expressing recombinant human GABA(A) alpha1, beta2 and gamma2S subunits of receptor was stably transfected with the cytoplasmic domain ribozyme (cy) alone and with both the cytoplasmic (cy) and extracellular domain (ex) ribozyme expression plasmids. Northern analysis showed a 55-60% reduction of alpha1 mRNA in clones of cells transfected with either the single ribozyme (Cy) or with both ribozymes (EC). The alpha1 protein level was reduced 75% in a stable Cy clone and more than 90% in a stable EC clone when compared with alpha1 expression in 122 cells and the vector transfected (Zeo) cells. Electrophysiological analysis revealed that the GABA(A) receptor properties were very similar in 122 cells and in stable clones in which the subunit protein expression had been greatly reduced. No significant difference was detected in the potentiation of the receptor response by either bretazenil or zolpidem. These data demonstrate the efficacy of the ribozyme approach in dramatically reducing GABA(A) subunit protein levels in transfected cells and identify those elements that will be important to the application of similar ribozymes to knock-down transmitter receptor subunit proteins under inducible promoters in transgenic mice.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11483251&dopt=Abstract

word search insomnia ambien online literature

Psychopharmacology (Berl). 2001 Aug;156(4):417-26.
Comparative effects of melatonin, zolpidem and diazepam on sleep, body temperature, blood pressure and heart rate measured by radiotelemetry in Wistar rats.

Mailliet F, Galloux P, Poisson D.

UMR INRA-CNRS-Universite de Tours 6073, Physiologie de la Reproduction et des Comportements, 37380 Nouzilly, France. Francois.Mailliet

word search insomnia ambien online literature

DreamPharm: Herbal and Nutritional supplements online || Hair Million herbal formula for hair loss and hair growth || Wellstreet online pharmacy for click-order prescription medications || Altace Online Pharmacy || Rx Drugs USA, Prescription Drugs Online Pharmacy || Insurance plans and information || Insurance policies for all purposes || Antibiotics and prescription medications online literature ||