Body fluid resistant tissue adhesives

Patent metadata

Field	Value
Publication number	US-12319844-B2
Application number	US-202318535124-A
Country	US
Kind code	B2
Filing date	Dec 11, 2023
Priority date	Dec 3, 2019
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

A tissue adhesive material that provides fast and robust adhesion even on tissue surfaces covered in bodily fluids. The tissue adhesive material is formed of a hydrophobic matrix and a plurality of bioadhesive microparticles dispersed within the hydrophobic matrix configured such that disposing the adhesive material directly on a fluid covered surface and applying pressure causes the (a) hydrophobic matrix to repel the fluid, (b) the bioadhesive particles to compress forming an adhesive layer, and (c) the bioadhesive particles to form temporary crosslinks followed by covalent crosslinks with the surface.

First claim

What is claimed is:

1. A method of adhering one or more tissue surfaces covered in one or more fluids comprising:
(a) applying an adhesive material directly to one or more of the fluid covered tissue surfaces, the adhesive material comprising: a hydrophobic matrix; and a plurality of bioadhesive microparticles dispersed within the hydrophobic matrix, the bioadhesive microparticles comprising: (i) one or more hydrophilic polymers or copolymers; (ii) one or more amine coupling groups, and (iii) one or more cross linkers;
(b) applying pressure ranging from about 1 kPa to 50 kPa to the adhesive material;
(c) allowing the hydrophobic matrix to repel and clean the one or more fluids from the tissue surfaces;
(d) allowing physical bond forming group in the bioadhesive microparticles to form temporary crosslinks by intermolecular bonds; and
(e) allowing amine coupling groups in the bioadhesive microparticles to form covalent crosslinks with the tissue surfaces.

2. The method of claim 1 , wherein pressure is applied for about 5 seconds to about 30 seconds.

3. The method of claim 1 , wherein the adhesive material is an injectable adhesive material, and the adhesive material is applied using a syringe.

4. The method of claim 1 , wherein the (i) one or more hydrophilic polymers or copolymers are selected from hydrophilic polymers or copolymers that absorb water at a dry state.

5. The method of claim 1 , wherein the (i) one or more hydrophilic polymers or copolymers are selected from polyacrylic acid, polyacrylamide, polyvinyl alcohol, polyhydroxy ethyl methacrylate, polyethylene glycol, polyurethane, casein, albumin, gelatin, chitosan, hyaluronic acid, alginate, oxidized alginate, cellulose, oxidized cellulose, poly vinyl pyrrolidone, poly styrene sulfonate, collagen, alginic acid, pectin, and combinations thereof.

6. The method of claim 1 , wherein the (ii) one or more amine coupling groups are selected from N-hydroxysuccinimide ester, N-hydroxysulfosuccinimide ester, aldehyde, imidoester, epoxide, isocyanate, catechol, and combinations thereof.

7. The method of claim 1 , wherein the (iii) one or more crosslinkers are selected from gelatin methacrylate, hyaluronic acid methacrylate, oxidized methacrylic alginate, polycaprolactone diacrylate, N,N′-bis(acryloyl) cystamine, N,N′-methylenebis(acrylamide), polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, and combinations thereof.

8. The method of claim 1 , wherein the hydrophobic matrix is selected from silicone oils, mineral oils, essential oils, perfluoropolyether oils, lanolin oils, and combinations thereof.

9. The method of claim 1 , wherein the adhesive comprises plurality of bioadhesive microparticles fabricated of (i) poly(acrylic acid) grafted with (ii) N-hydroxysuccinimide ester (PAAc-co-NHS ester) (iii) crosslinked with biodegradable gelatin methacrylate and (i) biodegradable chitosan, dispersed in a silicone oil hydrophobic matrix.

10. The method of claim 1 , wherein the adhesive material adheres with an interfacial toughness of at least about 100 J m −2 , shear strength of at least about 30 kPa and tensile of at least about 10 kPa.

11. The method of claim 1 , wherein the physical bond forming groups in the bioadhesive microparticles are carboxylic acid groups which form the temporary crosslinks by intermolecular bonds.

12. The method of claim 1 , wherein the bioadhesive microparticles have a particle size ranging from about 10 μm to about 200 μm.

13. The method of claim 1 , wherein the adhesive material comprises a ratio between the bioadhesive microparticles and the hydrophobic matrix ranging from about 1:3 to about 1:0.5.

14. The method of claim 1 , wherein the one or more fluids are physiological body fluids selected from blood plasma, interstitial fluid, lymphatic fluid, cerebrospinal fluid, gastrointestinal fluid, and combinations thereof.

15. The method of claim 1 , wherein after (a) applying an adhesive material directly to one or more of the fluid covered tissue surfaces and prior to (b) applying pressure, the method further comprises applying a backing material to the adhesive material and wherein (b) applying pressure comprises applying pressure to the adhesive material via the backing material.

16. The method of claim 15 , wherein the backing material is fabricated of a biocompatible material that does not adhere to wet surfaces.

17. The method of claim 16 , wherein the backing material is fabricated of oxidized cellulose, silicone elastomer, polyurethane, hydrogel, any other biocompatible materials that do not adhere to wet tissue, and combinations thereof.

18. The method of claim 1 , wherein the one or more tissue surfaces comprise a tissue injury, the method further comprising (f) allowing cell infiltration into the crosslinked bioadhesive microparticles and healing of the underlying tissue injury.

19. A method of healing a tissue injury comprising:
(a) applying an adhesive material directly to the tissue injury, wherein the tissue injury comprises one or more fluid covered tissue surfaces, the adhesive material comprising: a hydrophobic matrix; and a plurality of bioadhesive microparticles dispersed within the hydrophobic matrix, the bioadhesive microparticles comprising: (i) one or more hydrophilic polymers or copolymers; (ii) one or more amine coupling groups, and (iii) one or more cross linkers;
(b) applying pressure ranging from about 1 kPa to 50 kPa to the adhesive material;
(c) allowing the hydrophobic matrix to repel and clean the one or more fluids from the tissue surfaces;
(d) allowing physical bond forming group in the bioadhesive microparticles to form temporary crosslinks by intermolecular bonds;
(e) allowing amine coupling groups in the bioadhesive microparticles to form covalent crosslinks with the tissue surfaces; and
(f) allowing cell infiltration into the crosslinked bioadhesive microparticles and healing of the underlying tissue injury.

20. The method of claim 19 , wherein the adhesive material is biodegradable, and wherein the cells replace the biodegrading bioadhesive microparticles to heal the underlying tissue injury.

Assignees

• Massachusetts Inst Technology
• Mayo Found Medical Education & Res

Inventors

• Zhao Xuanhe
• Yuk Hyunwoo
• Mao Xinyu
• Nabzdyk Christoph

Classifications

• C09J151/003

  grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C09J151/04, C09J151/06 take precedence) · CPC title

• C09J2483/00

  Presence of polysiloxane · CPC title

• A61L24/0042

  Materials resorbable by the body · CPC title

• C09J9/00

  Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks (C09J7/00 takes precedence) · CPC title

• A61L2400/04

  Materials for stopping bleeding · CPC title