Abstract:
:The subcommissural organ (SCO) is a brain gland secreting glycoproteins into the cerebrospinal fluid (CSF), where they aggregate forming the Reissner's fiber (RF). By the continuous addition of newly released glycoproteins, RF grows along the cerebral aqueduct, fourth ventricle, and central canal of the spinal cord. At the filum, RF-glycoproteins escape from the central canal and reach the local blood vessels. Despite a century of research, the function of the SCO remains elusive. The aim of the present investigation was to test the hypothesis that RF-glycoproteins, by binding and transporting monoamines out of the CSF, participate in the clearance of these compounds. A protocol was designed that led to the permanent immunoneutralization of the SCO through the maternal delivery of antibodies. This was achieved by transplacental transfer to the fetuses, and through the milk to the pups, of specific antibodies against SCO secretory proteins. The antibodies reached the CSF of the fetuses and pups and blocked the RF formation during the first months of life. Some of these animals died during the first postnatal weeks; those who survived displayed a rise in the CSF concentration of several monoamines, l-DOPA being the one with the highest rise. Adult rats transiently deprived of RF by a single injection of anti-RF antibodies into the CSF showed a transient rise in the CSF concentration of l-DOPA. All these results support the hypotheses that the SCO-RF complex participates in the clearance of monoamines from the CSF.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Rodríguez S,Vio K,Wagner C,Barría M,Navarrete EH,Ramírez VD,Pérez-Fígares JM,Rodríguez EMdoi
10.1007/s002210050848keywords:
subject
Has Abstractpub_date
1999-10-01 00:00:00pages
278-90issue
3eissn
0014-4819issn
1432-1106pii
91280278.221journal_volume
128pub_type
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