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RNAi-mediated inhibition of ocular hypertension targets

a technology of ocular hypertension and rna composition, which is applied in the direction of lyse, drug composition, cardiovascular disorder, etc., can solve the problems of abnormally high resistance to fluid drainage from the eye, pharmaceutical anti-glaucoma approaches that have exhibited various undesirable side effects, blurred vision, etc., and achieve the effect of lowering intraocular pressur

Inactive Publication Date: 2006-08-03
ARROWHEAD RES CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008] The present invention is directed to interfering RNAs that silence ocular hypertension target mRNA expression, thus lowering intraocular pressure in patients with open-angle glaucoma or ocular hypertension. Ocular hypertension targets includ...

Problems solved by technology

POAG is characterized by the degeneration of the trabecular meshwork, resulting in abnormally high resistance to fluid drainage from the eye.
Pharmaceutical anti-glaucoma approaches have exhibited various undesirable side effects.
For example, miotics such as pilocarpine can cause blurring of vision and other negative visual side effects.
Systemically administered carbonic anhydrase inhibitors (CAIs) can also cause nausea, dyspepsia, fatigue, and metabolic acidosis.
Further, certain beta-blockers have increasingly become associated with serious pulmonary side effects attributable to their effects on beta-2 receptors in pulmonary tissue.
Such negative side effects may lead to decreased patient compliance or to termination of therapy.
In addition, the efficacy of current IOP lowering therapies is relatively short-lived requiring repeated dosing during each day and, in some cases, the efficacy decreases with time.

Method used

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  • RNAi-mediated inhibition of ocular hypertension targets

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example 1

Interfering RNA for Specifically Silencing CA2 in HeLa Cells

[0182] The present study examines the ability of CA2-interfering RNA to knock down the levels of endogenous CA2 expression in cultured HeLa cells.

[0183] Transfection of HeLa cells was accomplished using standard in vitro concentrations (100 nM and 1 nM) of CA2 siRNAs, or a non-targeting control siRNA and DharmaFECT™ 1 transfection reagent (Dharmacon, Lafayette, Colo.). All siRNAs were dissolved in 1×siRNA buffer, an aqueous solution of 20 mM KCl, 6 mM HEPES (pH 7.5), 0.2 mM MgCl2. CA2 protein expression and actin protein expression (loading control) was evaluated by western blot analysis 72 hours post-transfection. The CA2 siRNAs are double-stranded interfering RNAs having specificity for the following target sequences: siCA2#1 targets SEQ ID NO:721; siCA2#3 targets SEQ ID NO:15; siCA2#4 targets SEQ ID NO:720; siCA2#5 targets SEQ ID NO:141. Each of the four CA2 siRNAs decreased CA2 expression significantly at both 100 nM ...

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Abstract

RNA interference is provided for inhibition of ocular hypertension target mRNA expression for lowering elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension. Ocular hypertension targets include carbonic anhydrase II, IV, and XII; β1- and β2 adrenergic receptors; acetylcholinesterase; Na+ / K+-ATPase; and Na—K-2Cl cotransporter. Ocular hypertension is treated by administering interfering RNAs of the present invention.

Description

[0001] The present application claims the benefit of co-pending U.S. Provisional Patent Applications having Ser. Nos. 60 / 648,926 filed Feb. 1, 2005, and 60 / 753,364 filed Dec. 22, 2005, the texts of which are specifically incorporated by reference herein.FIELD OF THE INVENTION [0002] The present invention relates to the field of interfering RNA compositions for inhibition of expression of ocular hypertension targets in glaucoma, particularly for primary open angle glaucoma. BACKGROUND OF THE INVENTION [0003] Glaucoma is a heterogeneous group of optic neuropathies that share certain clinical features. The loss of vision in glaucoma is due to the selective death of retinal ganglion cells in the neural retina that is clinically diagnosed by characteristic changes in the visual field, nerve fiber layer defects, and a progressive cupping of the optic nerve head (ONH). One of the main risk factors for the development of glaucoma is the presence of ocular hypertension (elevated intraocular ...

Claims

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Application Information

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IPC IPC(8): A61K48/00C12N15/113
CPCC12N15/1137C12N15/1138C12N2310/111C12N2310/14C12N2310/53C12Y301/01007C12Y306/03009C12Y402/01001A61P27/02A61P27/06A61P43/00A61P9/12C12N15/113A61K31/713
Inventor SHEPARD, ALLANCHATTERTON, JONCLARK, ABBOT
Owner ARROWHEAD RES CORP
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