Abstract:
The present invention provides novel compounds having activity as histamine H3-receptor antagonists. In a preferred aspect, the compounds of the invention exhibit ready penetration of the blood-brain-barrier and reduced toxicity. The novel compounds of the invention include compounds of the formula (I) wherein D is CH2 or CH2-CH2, Z represents S or O, preferably O, x is 0 or 1, n is an integer from 0 to 6, R1 represents preferably hydrogen, or a hydrolysable group, but can be a lower alkyl or aryl group, and R2 represents a linear chain, branched chain or carbocyclic group or aryl group of up to about 20 carbon atoms, and salts thereof. If R2 is tert-butyl, cyclohexyl, or dicyclohexylmethyl, x or n must not be 0. If R2 is adamantane, the sum of x and n must be greater than 1. The various alkyl or aryl groups can have functional group substituents. Illustrative of the compounds of the invention is the molecule 4-(1-cyclohexylvaleryol-4-piperidyl)-1H-imidazole.
Abstract:
An implantable bioartificial pancreas device (1) having an islet chamber (5) containing glucose responsive and insulin-secreting islets of Langerhans or similar hormone secreting cells, the islet chamber (5) having baffle means (60) inside thereof to assist in even distribution of the islets in the chamber, one or more vascularizing chambers (10) open to surrounding tissue, a semi-permeable membrane (25) between the islet and vascularizing chambers that allows passage of small molecules including insulin, oxygen and glucose and does not allow passage of agents of the immune system such as white cells and antibodies, the vascularizing chambers containing a growth factor soaked fibrous or foam matrix (30) having a porosity of about 40 to 95 %, the matrix providing small capillary growth and preventing the blood from clotting in the lower chamber.
Abstract:
The present invention relates to a novel process for the preparation of highly potent histamine receptor antagonists (I), in particular histamine H3-receptor antagonists. Also disclosed is a novel process for the preparation of intermediates (II) and (III) useful in the preparation of histamine receptor antagonists, in particular H3-receptor antagonists.
Abstract:
A muscarinic agonist compound having structure (I) or (II). In structure (I) R is methyl or dimethylamino. In structure (II) R' is dimethylamino.
Abstract:
Purified imines of porphyrins, chlorins, bacteriochlorins, chlorophylls, bacteriochlorophylls, purpurins, reduced purpurins, verdins, Diels Alder adducts, benzochlorins and metal complexes of the foregoing imines are disclosed. The formulas of the benzochlorinimines and of the benzochlorinimine metal complexes are set forth (1) and (2). In specific examples, M in the metal complexes is a copper cation that is complexed with two of the nitrogens of the benzochlorinimine R' and R"" are methyl, and R1 through R8 are ethyl.
Abstract:
A muscarinic agonist compound having formula (I) or (II) or a pharmaceutically acceptable salt thereof. In formula (I) R is (trans) 3-methyl-2-penten-4-ynyl, (cis) 3-methyl-2-penten-4-ynyl, 2-butynyl, 2-methylbutenyl, 3-methylpropynyl, phenylpropynyl, butynyl. In formula (II) R' is butynyl.
Abstract:
The present invention is directed to compounds of the class of piperidyl-imidazole derivative histamine H3-receptor antagonist. Such compounds have affinity for histamine H3-receptor, and preferably penetrate the blood-brain barrier. The compounds can block the soporific effect of an H3-receptor agonist. Illustrative of the compounds of the invention is the molecule 4-(1-cyclohexylvaleroyl-4-piperidyl)-1H-imidazole. These compounds have been found to have utility in treating cognitive disorders and have been found to be useful as appetite suppressants.
Abstract:
A method of delivering a cytotoxic compound to a cancer cell and getting the compound inside the cancer cell using a plasminogen material such as a plasminogen activator inhibitor (PAI-1). The toxic compound is coupled to PAI-1 to form a reaction product that is coupled with urokinase plasminogen activator (uPA) that is bound to the cell surface by uPA receptors (uPAR). The resultant complex is internalized to enter the cancer cell to deliver the cytotxic compound within the cell.
Abstract:
A method of electroless plating at least one homogeneous metal coating in a predetermined pattern on a solid substrate surface having pendant hydroxy groups. The method includes the steps of providing a first monatomic metal layer in a predetermined pattern on the solid substrate surface having pendant hydroxy groups and then immersing the solid substrate surface in a bath containing a chemical reducing agent to build up the at least one homogeneous metal coating only on the monatomic metal layer.
Abstract:
A second sphere contrast enhancing agent for medical resonance imaging comprises a paramagnetic metal ion having catecholate ligands coordinated thereto and having water molecules hydrogen bonded to the catecholate ligands.