Biomaterial Database

Synthesis of new arylpiperazinylalkylthiobenzimidazole, benzothiazole, or benzoxazole derivatives as potent and selective 5-HT1A serotonin receptor ligands. 2008

Maria A Siracusa, and Loredana Salerno, and Maria N Modica, and Valeria Pittalà, and Giuseppe Romeo, and Maria E Amato, and Mateusz Nowak, and Andrzej J Bojarski, and Ilario Mereghetti, and Alfredo Cagnotto, and Tiziana Mennini

Dipartimento di Scienze Farmaceutiche, Università di Catania, Catania, Italy. siracusa@unict.it

A series of new compounds containing a benzimidazole, benzothiazole, or benzoxazole nucleus linked to an arylpiperazine by different thioalkyl chains was prepared. They were tested in radioligand binding experiments to evaluate their affinity for 5-HT 1A and 5-HT 2A serotonergic, alpha 1 adrenergic, D1, and D2 dopaminergic receptors. Many of tested compounds showed an interesting binding profile; in particular, 36 displayed very high 5-HT 1A receptor affinity and selectivity over all the other investigated receptors. Selected compounds, evaluated in functional assays, showed antagonistic or partial agonistic activity at 5-HT 1A receptor. An extensive conformational research using both NMR and modeling techniques indicated that extended conformations predominated in vacuum, in solution and during interactions with 5-HT 1A receptor. Finally, the elaborated binding mode of selected compounds at 5-HT 1A receptor was used to explain the influence of spacer length on ligands affinity.

UI	MeSH Term	Description	Entries
D008024	Ligands	A molecule that binds to another molecule, used especially to refer to a small molecule that binds specifically to a larger molecule, e.g., an antigen binding to an antibody, a hormone or neurotransmitter binding to a receptor, or a substrate or allosteric effector binding to an enzyme. Ligands are also molecules that donate or accept a pair of electrons to form a coordinate covalent bond with the central metal atom of a coordination complex. (From Dorland, 27th ed)	Ligand
D008958	Models, Molecular	Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.	Molecular Models,Model, Molecular,Molecular Model
D009682	Magnetic Resonance Spectroscopy	Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).	In Vivo NMR Spectroscopy,MR Spectroscopy,Magnetic Resonance,NMR Spectroscopy,NMR Spectroscopy, In Vivo,Nuclear Magnetic Resonance,Spectroscopy, Magnetic Resonance,Spectroscopy, NMR,Spectroscopy, Nuclear Magnetic Resonance,Magnetic Resonance Spectroscopies,Magnetic Resonance, Nuclear,NMR Spectroscopies,Resonance Spectroscopy, Magnetic,Resonance, Magnetic,Resonance, Nuclear Magnetic,Spectroscopies, NMR,Spectroscopy, MR
D010879	Piperazines	Compounds that are derived from PIPERAZINE.
D011485	Protein Binding	The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.	Plasma Protein Binding Capacity,Binding, Protein
D000077489	Piperazine	An anti-nematodal agent effective against the intestinal nematodes ASCARIS LUMBRICOIDES (roundworm) and ENTEROBIUS VERMICULARIS (pinworm, threadworm). It produces a neuromuscular block leading to flaccid muscle paralysis in susceptible worms, which are then dislodged from the gut and expelled in feces.	1,4-Diazacyclohexane,1,4-Piperazine,Piperazine Diacetate,Piperazine Dihydrochloride,Piperazine Hexahydrate,Piperazine Hydrate,Piperazine Hydrobromide,Piperazine Hydrochloride,Piperazine Monohydrochloride,Piperazine Phosphate,Piperazine Phosphate (1:1),Piperazine Phosphate Anhydrous,Piperazine Salt,Piperazine Sulfate,Piperazine Tartrate,Piperazine Tartrate (1:1), (R-(R,R))-isomer,Piperazine Tartrate, (R-(R,R))-isomer,Piperazinium Oleate,Pripsen,1,4 Diazacyclohexane,1,4 Piperazine
D000478	Alkylation	The covalent bonding of an alkyl group to an organic compound. It can occur by a simple addition reaction or by substitution of another functional group.	Alkylations
D013329	Structure-Activity Relationship	The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups.	Relationship, Structure-Activity,Relationships, Structure-Activity,Structure Activity Relationship,Structure-Activity Relationships
D015394	Molecular Structure	The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.	Structure, Molecular,Molecular Structures,Structures, Molecular
D044282	Receptor, Serotonin, 5-HT1A	A serotonin receptor subtype found distributed through the CENTRAL NERVOUS SYSTEM where they are involved in neuroendocrine regulation of ACTH secretion. The fact that this serotonin receptor subtype is particularly sensitive to SEROTONIN RECEPTOR AGONISTS such as BUSPIRONE suggests its role in the modulation of ANXIETY and DEPRESSION.	Serotonin 1A Receptor,5-HT(1A) Receptor,5-HT1A Receptor,5-Hydroxytryptamine 1A Receptor,5-Hydroxytryptamine 1A Receptors,Receptor, 5-Hydroxytryptamine 1A,Serotonin Receptor, 5-HT1A,Serotonin, 5-HT1a Receptor,1A Receptor, 5-Hydroxytryptamine,1A Receptors, 5-Hydroxytryptamine,5 HT1A Receptor,5 Hydroxytryptamine 1A Receptor,5 Hydroxytryptamine 1A Receptors,5-HT1A Serotonin Receptor,5-HT1a Receptor Serotonin,Receptor Serotonin, 5-HT1a,Receptor, 5 Hydroxytryptamine 1A,Receptor, 5-HT1A,Receptor, 5-HT1A Serotonin,Receptor, Serotonin 1A,Receptors, 5-Hydroxytryptamine 1A,Serotonin Receptor, 5 HT1A,Serotonin, 5 HT1a Receptor