The invention relates to a novel complex for oral delivery of drugs, therapeutic protein/peptides and vaccines which are loaded in a Vitamin B.sub.12 (VB.sub.12) coupled particulate carrier system with spacers in between, the carrier system with spacers having a formula VB.sub.12 --R'/R"--N wherein, R' or R" is spacer and/or agents for derivatization of VB.sub.12 to provide either NH.sub.2 or COOH or SH groups, and N is the micro or nano particle carriers for the delivery of injectable drugs, therapeutic protein/peptides and vaccines.

A invenção relaciona-se a um complexo da novela para a entrega oral das drogas, a protein/peptides therapeutic e a vacinas que sejam carregados em um sistema de portador particulate acoplado da vitamina B.sub.12 (VB.sub.12) com os espaçadores dentro no meio, o sistema de portador com os espaçadores que têm uma fórmula VB.sub.12 --R'/R SH "-- n wherein, R ' ou R" são espaçador e/ou agentes para o derivatization de VB.sub.12 para fornecer NH.sub.2 ou COOH ou grupos, e N são portadores os micro ou do nano da partícula para a entrega de drogas injectable, de protein/peptides therapeutic e de vacinas.

 
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