Glue composition for lung volume reduction
View Patent ↗The present invention relates to methods and compositions for sealing localized regions of damaged lung tissue to reduce overall lung volume. The glue compositions provide a glue featuring an adhering moiety coupled to one or more other moieties including, for example, a cross-linkable moiety and/or one other adhering moiety. The methods and compositions of the invention find use, for example, in treating pulmonary conditions, such as emphysema.
1. A method of reducing lung volume in a lung of a subject in need thereof comprising:
providing a glue composition comprising a first adhering moiety connected with a second adhering moiety, wherein the first and second adhering moieties are independently selected from the group consisting of a) alpha-1 antitrypsin, b) elafin, and c) serpin, and wherein the first and second adhering moieties adhere to different sites bearing elastase in a lung;
administering an effective amount of the glue composition to a localized region of damaged lung tissue of the subject;
adhering the first adhering moiety to a first site bearing elastase in the localized region of damaged lung tissue of the subject;
collapsing a first portion or all of the lung of said subject wherein the first portion comprises the localized region of damaged lung tissue;
adhering the second adhering moiety to a second site bearing elastase in the damaged lung tissue; and
re-inflating a second portion of the lung of the subject wherein the second portion does not comprise the damaged lung tissue, thereby reducing the lung volume.
2. The method as recited in claim 1 wherein the first adhering moiety is an alpha-1 antitrypsin moiety.
3. The method as recited in claim 2 wherein the alpha-1 antitrypsin moiety is a recombinant alpha-1 antitrypsin moiety.
4. The method as recited in claim 1 wherein the first adhering moiety is an elafin moiety.
5. The method as recited in claim 4 wherein the elafin moiety is a recombinant elafin moiety.
6. The method as recited in claim 1 wherein the first adhering moiety is a serpin moiety.
7. The method as recited in claim 6 wherein the serpin moiety is a recombinant serpin moiety.
8. The method as recited in claim 6 wherein the serpin moiety is a secretory leukoprotease inhibitor (SLP1) moiety.
9. The method as recited in claim 8 wherein the secretory leukoprotease inhibitor (SLP1) moiety is a recombinant secretory leukoprotease inhibitor (SLP1) moiety.
10. The method as recited in claim 1 wherein the first and second adhering moieties are cross-linked.
11. The method as recited in claim 10 wherein a cysteine residue of the first adhering moiety is cross-linked with a cysteine residue of the second adhering moiety.
12. The method as recited in claim 1 wherein the first and second adhering moieties are connected in such a way as not to interfere with the ability of the first and second adhering moieties to adhere lung tissue.
13. The method as recited in claim 1 wherein the first and second adhering moieties are coupled to each other at sites that do not modify the conformation or folding of the first and second adhering moieties.
14. The method as recited in claim 1 wherein the first and second adhering moieties are coupled to each other at sites that do not modify the conformation or folding of regions of the first and second adhering moieties necessary for adhering to sites of lung tissue.
15. The method as recited in claim 1 wherein the first and second adhering moieties are coupled to each other at sites that do not modify the conformation or folding of regions of the first and second adhering moieties involved in adhering to sites of lung tissue.