Galderma Holding Sa

Galderma S.a.

Johan Olsson

Craig Steven Harris

Hotan Mojarradi

Jean-Guy Boiteau

Loïc Tomas

Morgan Karlsson

Åke Öhrlund

Thibaut Gerfaud

Kristoffer Bergman

Lars Nord

The present disclosure provides a method of preparing a hydrogel product comprising crosslinked glycosaminoglycan molecules at a concentration C(mg/mL). The method comprising the steps of: a) crosslinking a glycosaminoglycan having a molecular weight of above 700 kDa in conditions so as to provide a glycosaminoglycan hydrogel crosslinked by amide bonds and having a C(mg/mL) that is above C/2, wherein Cis the concentration of gel-form glycosaminoglycan in the gel when fully swollen in physiological buffer; b) subjecting the hydrogel from step a) to post-crosslinking degradation of the glycosaminoglycan backbone, thereby reducing the Cof the hydrogel to a value that is below C/2; and c) formulating the partially degraded hydrogel obtained from step b) to form an injectable hydrogel composition having a concentration of glycosaminoglycan molecules of C(mg/mL).

Post-crosslinking partial degradation of amide crosslinked hydrogels

A method for at least partial deacetylation of a biopolymer comprising acetyl groups, including: a1) providing a biopolymer including acetyl groups; a2) reacting the biopolymer including acetyl groups with hydroxylamine (NHOH) or a salt thereof at a temperature of 100° C. or less for 2-200 hours to form an at least partially deacetylated biopolymer; and a3) recovering the at least partially deacetylated biopolymer.

Method for deacetylation of biopolymers

A method of preparing a hydrogel product comprising crosslinked glycosaminoglycan molecules, comprising the steps of: (a) providing a mixed solution of glycosaminoglycan molecules, a di- or multinucleophilic functional crosslinker, and a mononucleophilic functional graft chain; (b) activating carboxyl groups on the glycosaminoglycan molecules with a coupling agent to form activated glycosaminoglycan molecules; and (c) simultaneously crosslinking the activated glycosaminoglycan molecules and grafting the graft chain to the activated glycosaminoglycan molecules by reacting the nucleophiles with the activated carboxyl groups.

Method of preparing a hydrogel product

The present technology is directed to methods of producing 6,6'-diamino-6,6′-dideoxy-trehalose ('DATH') or a salt thereof. The methods include optionally protecting one or more hydroxyl groups of D-trehalose and converting the primary hydroxyl groups of D-trehalose to produce DATH or a salt thereof through use of a halogen, azide, and/or protected amine. The present technology is also directed to intermediate products of the methods.

Process for the production of DATH and intermediates thereof

A method of preparing a hydrogel product including crosslinked glycosaminoglycan molecules, said method including: i) providing a glycosaminoglycan crosslinked by amide bonds, wherein the crosslinked glycosaminoglycans include residual amine groups; and ii) acylating residual amine groups of the crosslinked glycosaminoglycans provided in i) to form acylated crosslinked glycosaminoglycans.

Method for preparing acylated crosslinked glycosaminoglycans

The invention relates to a hydrogel product comprising glycosaminoglycan molecules as the swellable polymer, wherein the glycosaminoglycan molecules are covalently crosslinked via crosslinks comprising a spacer group selected from the group consisting of di-, tri-, tetra-, and oligosaccharides.

Carbohydrate crosslinker

Described are high molecular weight glycosaminoglycan (GAG) hydrogel compositions comprising GAGs covalently crosslinked with a carbohydrate crosslinker, and methods of making the high molecular weight GAG hydrogel compositions. Further described are methods of using the high molecular weight glycosaminoglycan (GAG) hydrogel compositions for reparative or plastic surgery, esthetic dermatology, facial contouring, body contouring, and gingival augmentation.

High molecular weight esthetic compositions

A method for at least partial deacetylation of a biopolymer comprising acetyl groups, including: a1) providing a biopolymer including acetyl groups; a2) reacting the biopolymer including acetyl groups with hydroxylamine (NHOH) or a salt thereof at a temperature of 100&#xb0; C. or less for 2-200 hours to form an at least partially deacetylated biopolymer; and a3) recovering the at least partially deacetylated biopolymer.

A method of preparing a hydrogel product comprising crosslinked glycosaminoglycan molecules, said method including: i) providing a glycosaminoglycan crosslinked by amide bonds, wherein the crosslinked glycosaminoglycans include ester crosslinks formed as byproducts during the amide crosslinking; and ii) subjecting the crosslinked glycosaminoglycans to alkaline treatment to hydrolyze ester crosslinks formed as byproducts during the amide crosslinking.

Growing community of inventors

Bromma, Sweden

Johan Olsson