title: Immunoglobulin D in cerebrospinal fluid.
abstract: Immunoglobulin D (IgD) was measured by radioimmunoassay in paired cerebrospinal fluid and serum samples from patients with various neurological diseases. The IgD index was calculated for every patient and compared with the IgG index. An increased IgD index was found in 18 out of 41 patients suffering from multiple sclerosis and in 52 out of all 122 patients investigated. An increased IgD index did not always coincide with an increased IgG index. An increased IgD index suggests an abnormal intrathecal synthesis of this immunoglobulin within the central nervous system. We conclude that the determination of IgD in the cerebrospinal fluid yields additional information on immunological reactions within the central nervous system.
mesh_terms: D006801:Humans; D007072:Immunoglobulin D / Q000134:cerebrospinal fluid*; D007074:Immunoglobulin G / Q000134:cerebrospinal fluid; D009422:Nervous System Diseases / Q000134:cerebrospinal fluid; D011863:Radioimmunoassay
chemical_list: D007072:Immunoglobulin D; D007074:Immunoglobulin G