Methods for treating pulmonary fibrosis

1. A method of treating pulmonary fibrosis in a mammal comprising decreasing the activity of CCL21 in the fibrocytes and/or fibroblasts present at a fibrotic lesion in pulmonary fibrosis, disorder wherein said decreasing the activity of CCL21 comprises administering an anti-CCL21 antibody that inhibits CCL21 in said fibroblasts, in an amount effective to alleviate one or more symptoms of pulmonary fibrosis.

2. The method of claim 1 , wherein the method further comprises decreasing the activity of CCL19 in the fibroblasts associated with said pulmonary fibrosis comprising administering an anti-CCL19 antibody.

3. The method of claim 1 , wherein said decreasing the activity of CCL21 comprises administering an anti-CCL21 antibody that decreases the expression of CCL21 in said fibroblasts, in an amount effective to alleviate one or more of the symptoms of pulmonary fibrosis.

4. The method of claim 1 comprising administering said antibody locally to the site of a fibrosing lesion.

5. The method of claim 4 , wherein said fibrosing lesion is in a lung and said antibody is contacted locally with said lesion.

6. The method of claim 1 wherein said antibody comprises a targeting moiety to specifically locate said agent to the site of a fibrosing lesion.

7. The method of claim 1 wherein said antibody is administered using a mode of administration selected from the group consisting of topical administration, injection, inhalation, continuous release by depot or pump, or any combinations thereof.

8. A method of inhibiting fibroblast and/or fibrocyte proliferation in a patient with pulmonary fibrosis comprising contacting said fibroblast and/or fibrocyte with a composition that comprises an anti-CCL21 antibody.

9. The method of claim 8 , further comprising contacting said fibroblast with a composition that comprises an anti-CCL19 antibody.

10. The method of claim 8 or 9 , further comprising contacting said fibroblast with a composition that comprises an anti-CCR7 antibody.

11. The method of claim 8 wherein said fibrocytes and/or fibroblasts are located in vitro.

12. The method of claim 8 wherein said fibrocytes and/or fibroblasts are located in vivo.

13. The method of claim 8 wherein said fibrocytes and/or fibroblasts are located in vivo in lung tissue.

14. A method of inhibiting the migration of fibrocytes and/or activation of fibroblasts in a patient with pulmonary fibrosis comprising contacting said fibrocytes and/or fibroblasts with a composition comprising an anti-CCL21 antibody that inhibits that activity of CCL21, wherein said fibrocytes are located in vivo in a mammal and said method inhibits migration of fibrocytes to lung tissue in said mammal and prevents excessive production of extracellular matrix.

15. The method of claim 14 wherein said fibroblasts are resident pulmonary fibroblasts located in lung tissue in a mammal and said method inhibits activation of said fibroblasts in the lung tissue in said mammal, thereby preventing the excessive production of extracellular matrix.

16. A method of treating pulmonary fibrosis comprising inhibiting the migration of fibrocytes and/or the activation of resident pulmonary fibroblasts located in lung tissue in a subject suffering from fibrotic pulmonary disease comprising administering to said subject an anti-CCL21 antibody that inhibits the activity or expression of CCL21 in said fibrocytes and/or said fibroblasts thereby preventing the excessive production of extracellular matrix and ameliorating the symptoms of pulmonary fibrosis.

17. A method of treating or inhibiting the development of radiation-induced pulmonary laminitis and/or radiation induced pulmonary fibrosis in a subject comprising administering to said subject an anti-CCL21 antibody that decreases the presence or activity of CCL21 in the fibrocytes and/or fibroblasts in the pulmonary tissue of said subject, wherein said antibody is administered prior to, and/or during, and/or after the administration of radiation therapy.

18. The method of claim 17 , wherein the method further comprises administering an anti-CCL19 antibody that decreases the presence or activity of CCL19 in the fibroblasts associated with said pulmonary fibrosis.

19. A method of treating or inhibiting the development of drug-induced pulmonary fibrosis in a subject comprising administering to said subject an anti-CCL21 antibody that decreases the presence or activity of CCL21 in the fibrocytes and/or fibroblasts in the pulmonary tissue of said subject, wherein said antibody is administered prior to, and/or during, and/or after the administration of the drug.

20. The method of claim 19 wherein the method further comprises administering an anti-CCL19 antibody that decreases the presence or activity of CCL19 in the fibroblasts associated with said pulmonary fibrosis.

21. The method of 19 , wherein said drug is selected from the group consisting of a cytotoxic agent, an antibiotic, an antiarrhythmic agent, an anti-inflammatory agent, and an illicit drug.

22. The method of claim 19 , wherein said drug is selected from the group consisting of Amphotericin B, bleomycin, bromocriptine, busulfan, carbamazepin, chlorambucil, cocaine, cyclophosphamide, diphenylhydantoin, ergotamine, flecainide, heroin, melphalan, methadone, methotrexate, methylphenidate, methylsergide, mineral oil, nitrofurantoin, nitrosureas, procarbazine, silicone, sulfasalazine tocainide, and the vinca alkaloid class of agents.

23. The method of any of claims 16 through 22 wherein said anti-CCL21 antibody is administered in combination with corticosteroid, an immunosuppressive agent, an anticoagulant, a diuretic, a cardiac glycoside, a calcium channel blocker, a vasodilator, a prostacyclin analogue, an endothelin antagonist, a phosphodiesterase inhibitors, a beta-2 agonist, an antimuscarinic agent, an endopeptidase inhibitor, a lipid lowering agent and thromboxane inhibitors, or combinations thereof.