The purpose of the present disclosure is to provide a technique that can contribute to less invasive or more reliable diagnosis of lymphocytic anterior hypophysitis and its related diseases. For this purpose, the KCNMA1 (calcium-activated potassium channel subunit alpha-1) protein or an epitope thereof is used as a diagnostic agent for lymphocytic anterior hypophysitis.

The present invention relates to a lung cancer biomarker for diagnosing early stage lung cancers or predicting prognosis of lung cancers, which comprises a GM2AP protein. The present invention also relates to a method for diagnosing early stage lung cancers or predicting prognosis of lung cancers in vitro by detection of the biomarker.

Disclosed are adeno-associated virus (AAV) vectors comprising a nucleotide sequence encoding RP2 or RPGR-ORF15 and related pharmaceutical compositions. Also disclosed are methods of treating or preventing X-linked retinitis pigmentosa, increasing photoreceptor number in a retina of a mammal, and increasing visual acuity of a mammal using the vectors and pharmaceutical compositions.