The invention discloses a conjugate and application thereof in
inner ear diseases, the conjugate is formed by combining an
inner ear targeting polypeptide and a main
drug for diagnosing, preventing or treating the
inner ear diseases, so that the main
drug is assisted to target an inner ear or a specific structure and cells in the inner ear by virtue of the inner ear targeting polypeptide, the enrichment of the main
drug is realized, and the
inner ear diseases are prevented and treated. Therefore, targeted inner ear structures or cells can be accurately acted on; the efficiency of transporting the
medicine to the inner ear can be improved through the inner ear targeting polypeptide, so that the content of the
medicine reaching the inner ear is remarkably improved, and the inner ear
bioavailability of the
medicine is improved. The invention further provides application of the conjugate to the
inner ear diseases, and diagnosis, prevention or treatment of the
inner ear diseases can be conveniently achieved through the main medicine in the conjugate. More specifically, the delivery and medicinal process of the conjugate targeting inner ear outer hair cells is realized by locally delivering the conjugate A665-NAC. When the conjugate is applied to an inner ear acted by cis-
platinum,
hearing loss caused by cis-
platinum can be reduced, and the cis-
platinum ear
toxicity prevention and treatment effects are achieved.