Pulmonary administration of immunoglobulin single variable domains and constructs thereof
In one aspect, the invention relates to a method suitable for administering protein therapeutic molecules orally, sublingually, topically, intravenously, subcutaneously, nasally, vaginally, rectally or by inhalation so as to avoid inactivation, by using VHH polypeptides derived from Camelidae antibodies. The invention further relates to the said therapeutic molecules. The invention further a method for delivering therapeutic molecules to the interior of cells. The invention further relates to anti-IgE therapeutic molecules. In one aspect, the present invention relates to a method wherein an immunoglobulin single variable domain (such as a Nanobody) and/or construct thereof are absorbed in pulmonary tissue. More particularly, the invention provides systemic delivery of an immunoglobulin single variable domain and/or construct thereof via the pulmonary route.
1. Method of delivering an effective amount of a construct that consists essentially of one or more Nanobodies to the systemic circulation of a human; wherein if the construct consists essentially of two or more Nanobodies, then the construct optionally further consists essentially of one or more linkers connecting the two or more Nanobodies; wherein said construct is directed against one or more antigens accessible via the blood; and wherein the method comprises the step of administering said construct to the pulmonary tissue once a day or longer, and passive absorption of the construct via the pulmonary tissue.
2. Method of claim 1 , wherein the process of administering comprises the step of forming an aerosol comprising said construct by an appropriate inhaler device.
3. Method of claim 1 , wherein the method is able to deliver said construct to the systemic circulation with an absolute bioavailability that is at least 10% after administration of a single dose administration of said construct.
4. Method of claim 1 , wherein the terminal half-life of said construct in the systemic circulation is longer than 5 hours.
5. Method of claim 1 , wherein said construct is selected from the group consisting of a construct consisting essentially of a Nanobody, a construct consisting essentially of two Nanobodies directed against the same or different antigens optionally connected by a linker; and a construct consisting essentially of 3 Nanobodies directed against the same or different antigens optionally connected by at least one linker.
6. Method of claim 1 , wherein the one or more Nanobodies is a VHH or a humanized VHH.