{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T14:16:30Z","timestamp":1791123390674,"version":"4.1.0"},"reference-count":61,"publisher":"Society for Neuroscience","issue":"36","license":[{"start":{"date-parts":[[2008,3,5]],"date-time":"2008-03-05T00:00:00Z","timestamp":1204675200000},"content-version":"vor","delay-in-days":182,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Neurosci."],"published-print":{"date-parts":[[2007,9,5]]},"abstract":"<jats:p>Although human congenital cerebellar malformations are common, their molecular and developmental basis is still poorly understood. Recently, cilia-related gene deficiencies have been implicated in several congenital disorders that exhibit cerebellar abnormalities such as Joubert syndrome, Meckel-Gruber syndrome, Bardet-Biedl syndrome, and Orofaciodigital syndrome. The association of cilia gene mutations with these syndromes suggests that cilia may be important for cerebellar development, but the nature of cilia involvement has not been elucidated. To assess the importance of cilia-related proteins during cerebellar development, we studied the effects of CNS-specific inactivation of two mouse genes whose protein products are critical for cilia formation and maintenance,<jats:italic>IFT88<\/jats:italic>, (also known as<jats:italic>polaris<\/jats:italic>or<jats:italic>Tg737<\/jats:italic>), which encodes intraflagellar transport 88 homolog, and<jats:italic>Kif3a<\/jats:italic>, which encodes kinesin family member 3a. We showed that loss of either of these genes caused severe cerebellar hypoplasia and foliation abnormalities, primarily attributable to a failure of expansion of the neonatal granule cell progenitor population. In addition, granule cell progenitor proliferation was sensitive to partial loss of IFT function in a hypomorphic mutant of<jats:italic>IFT88<\/jats:italic>(IFT88<jats:sup>orpk<\/jats:sup>), an effect that was modified by genetic background.<jats:italic>IFT88<\/jats:italic>and<jats:italic>Kif3a<\/jats:italic>were not required for the specification and differentiation of most other cerebellar cell types, including Purkinje cells. Together, our observations constitute the first demonstration that cilia proteins are essential for normal cerebellar development and suggest that granule cell proliferation defects may be central to the cerebellar pathology in human cilia-related disorders.<\/jats:p>","DOI":"10.1523\/jneurosci.5586-06.2007","type":"journal-article","created":{"date-parts":[[2007,9,5]],"date-time":"2007-09-05T16:39:17Z","timestamp":1189010357000},"page":"9780-9789","source":"Crossref","is-referenced-by-count":207,"title":["Cilia Proteins Control Cerebellar Morphogenesis by Promoting Expansion of the Granule Progenitor Pool"],"prefix":"10.1523","volume":"27","author":[{"given":"Victor 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