Yissum Research Development Company of the Hebrew University of Jerusalem Ltd.

Hadasit Medical Research Services and Development Ltd.

State of Israel, Ministry of Agriculture & Rural Development, Agricultural Research Organization

Itzhack Polacheck

Abraham J Domb

Shimon Benita

Galina Linden

Doron Steinberg

Adel Jabbour

Edward Sionov

Simon Tinman

Morris Srebnik

Rama Falk

Novel agents exhibiting anti-biofilm formation activity while being non-cytotoxic are provided, as well as methods of using the same, either per se or conjugated to a polymer, for preventing and/or reducing the formation of microbial biofilms and/or for disrupting microbial biofilms. The novel agents described herein include thiazolidine-2,4-diones (TZDs), pyrrolidine-2,5-diones (PYDs), imidazolidine-2,4-diones or oxazolidine-2,4-diones, substituted by an alkyl having 7-20 carbon atoms in its backbone chain.

Anti-biofilm agents

The invention relates to methods of treatment and prevention of aquatic mold infections in aquatic organisms and methods of disinfecting equipment used in raising aquatic organisms. The methods comprise use of one or more stilbene derivatives, including 4,4'-bis-(1,3,5-triazinylamino)stilbene-2,2&#x2032;-disulfonic acid derivatives.

Use of stilbene derivatives for treatment and prevention of aquatic mold infections

A method for producing a water-soluble polysaccharide conjugate of an oxidation-sensitive substance is described. The method comprises the following steps: (a) activating the polysaccharide to a dialdehyde by periodate oxidation; (b) purifying the dialdehyde from interfering anions and by-products; and (c) coupling the substance to the purified dialdehyde by Schiff base formation to form the conjugate. Optionally, the conjugate of step (c) is reduced to an amine conjugate by a reducing substance. The product conjugate may then be further purified from various reaction byproducts. The disclosed method results in the substance substantially retaining its biological activity. Also described are imine and amine polysaccaride conjugates of various drugs and polypeptides.

Conjugates of biologically active substances

A method for producing a substantially stable water-soluble polysaccharide conjugate of a polyene antibiotic is described. The method comprises the following steps: (a) activating the polysaccharide to a dialdehyde by periodate oxidation; (b) purifying the dialdehyde from interfering anions and by-products; (c) coupling the polyene to the purified dialdehyde by Schiff base formation to form the conjugate; and (d) purifying the conjugate. In a preferred embodiment, the conjugate of step (c) is reduced to an amine conjugate by a reducing agent prior to purification. Also described are imine and amine polysaccaride conjugates of the polyene Nystatin.

Water-Soluble polyene conjugate

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Jerusalem, Israel

Itzhack Polacheck