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1. US20020123809 - Processes for making cryopreserved composite living constructs and products resulting therefrom

Office
États-Unis d'Amérique
Numéro de la demande 10032929
Date de la demande 26.12.2001
Numéro de publication 20020123809
Date de publication 05.09.2002
Numéro de délivrance 6638709
Date de délivrance 28.10.2003
Type de publication B2
CIB
A01N 1/00
ANÉCESSITÉS COURANTES DE LA VIE
01AGRICULTURE; SYLVICULTURE; ÉLEVAGE; CHASSE; PIÉGEAGE; PÊCHE
NCONSERVATION DE CORPS HUMAINS OU ANIMAUX OU DE VÉGÉTAUX, OU DE PARTIES DE CEUX-CI; BIOCIDES, p.ex. EN TANT QUE DÉSINFECTANTS, PESTICIDES OU HERBICIDES; PRODUITS REPOUSSANT OU ATTIRANT LES ANIMAUX NUISIBLES; RÉGULATEURS DE CROISSANCE DES VÉGÉTAUX
1Conservation de corps humains ou animaux, ou de parties de ceux-ci
A01N 1/02
ANÉCESSITÉS COURANTES DE LA VIE
01AGRICULTURE; SYLVICULTURE; ÉLEVAGE; CHASSE; PIÉGEAGE; PÊCHE
NCONSERVATION DE CORPS HUMAINS OU ANIMAUX OU DE VÉGÉTAUX, OU DE PARTIES DE CEUX-CI; BIOCIDES, p.ex. EN TANT QUE DÉSINFECTANTS, PESTICIDES OU HERBICIDES; PRODUITS REPOUSSANT OU ATTIRANT LES ANIMAUX NUISIBLES; RÉGULATEURS DE CROISSANCE DES VÉGÉTAUX
1Conservation de corps humains ou animaux, ou de parties de ceux-ci
02Conservation de parties vivantes
A61L 27/38
ANÉCESSITÉS COURANTES DE LA VIE
61SCIENCES MÉDICALE OU VÉTÉRINAIRE; HYGIÈNE
LPROCÉDÉS OU APPAREILS POUR STÉRILISER DES MATÉRIAUX OU DES OBJETS EN GÉNÉRAL; DÉSINFECTION, STÉRILISATION OU DÉSODORISATION DE L'AIR; ASPECTS CHIMIQUES DES BANDAGES, DES PANSEMENTS, DES GARNITURES ABSORBANTES OU DES ARTICLES CHIRURGICAUX; MATÉRIAUX POUR BANDAGES, PANSEMENTS, GARNITURES ABSORBANTES OU ARTICLES CHIRURGICAUX
27Matériaux pour prothèses ou pour revêtement de prothèses
36contenant des constituants de constitution indéterminée ou leurs produits réactionnels
38Cellules animales
C12N 5/08
CCHIMIE; MÉTALLURGIE
12BIOCHIMIE; BIÈRE; SPIRITUEUX; VIN; VINAIGRE; MICROBIOLOGIE; ENZYMOLOGIE; TECHNIQUES DE MUTATION OU DE GÉNÉTIQUE
NMICRO-ORGANISMES OU ENZYMES; COMPOSITIONS LES CONTENANT; CULTURE OU CONSERVATION DE MICRO-ORGANISMES; TECHNIQUES DE MUTATION OU DE GÉNÉTIQUE; MILIEUX DE CULTURE
5Cellules non différenciées humaines, animales ou végétales, p.ex. lignées cellulaires; Tissus; Leur culture ou conservation; Milieux de culture à cet effet
08Cellules ou tissus humains
CPC
A61L 27/3891
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
27Materials for ; grafts or; prostheses or for coating ; grafts or; prostheses
36containing ingredients of undetermined constitution or reaction products thereof ; , e.g. transplant tissue, natural bone, extracellular matrix
38containing added animal cells
3886comprising two or more cell types
3891as distinct cell layers
A01N 1/02
AHUMAN NECESSITIES
01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
1Preservation of bodies of humans or animals, or parts thereof
02Preservation of living parts
A01N 1/0221
AHUMAN NECESSITIES
01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
1Preservation of bodies of humans or animals, or parts thereof
02Preservation of living parts
0205Chemical aspects
021Preservation or perfusion media, liquids, solids or gases used in the preservation of cells, tissue, organs or bodily fluids
0221Freeze-process protecting agents, i.e. substances protecting cells from effects of the physical process, e.g. cryoprotectants, osmolarity regulators like oncotic agents
A01N 1/0231
AHUMAN NECESSITIES
01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
1Preservation of bodies of humans or animals, or parts thereof
02Preservation of living parts
0205Chemical aspects
0231Chemically defined matrices, e.g. alginate gels, for immobilising, holding or storing cells, tissue or organs for preservation purposes; Chemically altering or fixing cells, tissue or organs, e.g. by cross-linking, for preservation purposes
A01N 1/0284
AHUMAN NECESSITIES
01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
1Preservation of bodies of humans or animals, or parts thereof
02Preservation of living parts
0278Physical preservation processes
0284Temperature processes, i.e. using a designated change in temperature over time
A61L 27/3804
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
27Materials for ; grafts or; prostheses or for coating ; grafts or; prostheses
36containing ingredients of undetermined constitution or reaction products thereof ; , e.g. transplant tissue, natural bone, extracellular matrix
38containing added animal cells
3804characterised by specific cells or progenitors thereof, e.g. fibroblasts, connective tissue cells, kidney cells
Déposants Ortec International, Inc.
Inventeurs Tai, Hsin-Chien
Laufer, Alla
Song, Ying
Ray, Nitya G.
Mandataires Lilore, Ralph T.
Données relatives à la priorité 10032929 26.12.2001 US
Titre
(EN) Processes for making cryopreserved composite living constructs and products resulting therefrom
Abrégé
(EN)

Processes are described for making a cryopreserved Composite Living Construct (CCLC) as well as a corresponding thawed and rinsed CCLC, comprised of separated layers of cultured fibroblasts and cultured keratinocytes, wherein the percent of cells that are viable, i.e., the cell viability, of such CCLC is at least about 70 %. The viable cell density in the CCLC is at least about 50% of that before cryopreservation. The storage stability of the CCLC is at least about 12 months. Additionally, the metabolic activity of thawed and rinsed CCLC is at least about 50% of the Composite Living Construct (CLC) before cryopreservation. The structural integrity of CCLC is substantially the same as the CLC before cryopreservation. The process for making the CCLC comprises the steps of: providing a collagen substrate comprised of a collagen sponge layer and a nonporous to cells, semipermeable collagen layer; seeding and culturing, in the presence of a cell growth medium, fibroblasts on and within the collagen sponge layer and keratinocytes on the nonporous to cells, semipermeable collagen layer, thereby providing a CLC; equilibrating the CLC, according to a defined equilibration program with a cryoprotectant solution comprising at least chondroitin sulfate and dimethylsulfoxide; lowering the temperature, according to a programmed rate, to about −90° C.; and storing the CCLC at about −150° C. or lower. The process for preparing the CCLC to treat wounds in humans and in animals additionally comprises programmed thawing as well as a rinsing sequence to substantially remove the cryoprotectants.