Methods useful for vitamin D deficiency and related disorders

摘要

Methods for diagnosing, treating, and preventing catabolism-related vitamin D deficiency and related disorders, related compositions, apparatus and kits, are disclosed. A method involves measuring CYP24 expression and/or activity, or a proxy thereof such as FGF23 level, in a patient and correlating abnormally elevated CYP24 expression and/or activity with catabolism-related vitamin D deficiency or with susceptibility for catabolism-related vitamin D deficiency. In response to abnormally elevated CYP24 expression and/or activity, the method further includes administering a CYP24 inhibitor to the vitamin D deficient or at-risk patient, and preferably avoiding activation of the vitamin D binding receptor, such as by avoiding administration of active vitamin D compounds to such patients. Optionally, a vitamin D prohormone or prohormone can be administered.

主权项

1. A method of diagnosing and treating catabolism-related vitamin D deficiency or a susceptibility thereto in a patient having Chronic Kidney Disease, comprising:
requesting a test providing the results of a measurement, direct or indirect, of a patient's CYP24 expression and/or activity, wherein abnormally elevated CYP24 expression and/or activity indicates a susceptibility for catabolism-related vitamin D deficiency; and administering an effective amount of a pharmaceutically acceptable formulation comprising a CYP24 inhibitor to the patient in response to abnormally elevated CYP24 expression and/or activity to treat or prevent catabolism-related vitamin D deficiency defined as a total serum level of 25-hydroxyvitamin D below 30 ng/mL.