Methods and compositions for altering mucus secretion
Methods and compounds for increasing or decreasing mucus secretion in subjects, and particularly mucus secretion in the airways, are described. Methods of screening compounds for the ability to increase or decrease mucus secretion are also described.
1. A method of reducing mucus hypersecretion in a subject suffering from a medical condition in which mucus hypersecretion is a dominant clinical finding, the method comprising administration to the airways of said subject a pharmaceutical composition comprising a mucus-inhibitory amount of a N-terminal myristoylated peptide selected from the group consisting of the MANS peptide and a N-terminal myristoylated peptide fragment thereof comprising at least the first 10 amino acids of the MANS peptide, wherein said MANS peptide consists of a N-terminal myristoylated peptide of SEQ ID NO: 1, wherein said N-terminal myristoylated peptide reduces MARCKS protein-related mucus hypersecretion, and whereby mucus hypersecretion in the airways of said subject is reduced compared to that which would occur in the absence of said peptide.
2. The method according to claim 1 , wherein said N-terminal myristoylated peptide fragment comprises at least the first 15 contiguous amino acids of the MANS peptide.
3. The method according to claim 1 , wherein said N-terminal myristoylated peptide fragment comprises at least the first 20 contiguous amino acids of the MANS peptide.
4. The method according to claim 1 , wherein said mucus is secreted from a mucus-secreting cell that is an epithelial cell contained within airway mucous membranes.
5. The method according to claim 1 , wherein said condition comprises the dominant clinical finding of mucus hypersecretion in the respiratory tract.
6. The method according to claim 5 , wherein said condition is selected from the group consisting of chronic obstructive pulmonary disease (COPD), chronic bronchitis, bronchiectasis, emphysema, cystic fibrosis, pneumonia, influenza, rhinitis, and the common cold.
7. The method according to claim 6 , wherein said condition is selected from the group consisting of COPD, chronic bronchitis, and cystic fibrosis.
8. The method according to claim 1 , wherein said administration of the pharmaceutical composition comprises administration by inhalation, topical administration, oral administration, rectal administration or vaginal administration.
9. The method according to claim 1 , wherein said administration of the pharmaceutical composition is by inhalation.
10. The method according to claim 1 , wherein said administration of the pharmaceutical composition comprises use of an aerosol comprised of liquid particles or solid particles.
11. The method according to claim 1 , wherein the pharmaceutical composition comprises the N-terminal myristoylated peptide contained within liposomes.
12. The method according to claim 5 , wherein said administration of the pharmaceutical composition is to the airways of the subject.
13. The method according to claim 1 , wherein said subject is a mammal.
14. The method according to claim 1 , further comprising administration of at least one N-terminal myristoylated peptide.
15. The method according to claim 1 , further comprising administration of at least one compound that inhibits or reduces the MARCKS-related secretory pathway.
16. The method according to claim 1 , further comprising removal of retained mucus secretions from the airways of said mammalian subject prior to the administration of the pharmaceutical composition.