Novel receptor protein tyrosine phosphatase (RPTPρ) and acidic fibroblast growth factor (FGF-1) transcripts delineate a rostrocaudal boundary in the granule cell layer of the murine cerebellar cortex

• Published in: Journal of comparative neurology (1911) 1998-02, Vol.391 (4), p.444-455
• Main Authors: McAndrew, P.E., Frostholm, A., Evans, J.E., Zdilar, D., Goldowitz, D., Chiu, I.-M., Burghes, A.H.M., Rotter, A.
• Format: Article
• Language: English
• Subjects: Animals; anterior-posterior; Biomarkers - chemistry; Cerebellar Cortex - chemistry; Cerebellar Cortex - cytology; Cerebellar Cortex - embryology; Embryonic and Fetal Development - physiology; Fibroblast Growth Factor 1 - genetics; Genes, Homeobox; granule cells; meander tail; Mesencephalon - chemistry; Mesencephalon - embryology; Mice; Mice, Inbred C57BL; Neurons - chemistry; Otx-1; Otx-2; Protein Tyrosine Phosphatases - genetics; Receptors, Cell Surface - genetics; Rhombencephalon - chemistry; Rhombencephalon - embryology; RNA, Messenger - analysis; Signal Transduction - physiology
• ISSN: 0021-9967; 1096-9861
• DOI: 10.1002/(SICI)1096-9861(19980222)391:4<444::AID-CNE3>3.0.CO;2-0

We have identified a novel receptor‐like protein tyrosine phosphatase (RPTPρ) transcript whose expression in the cerebellar cortex is restricted to the granule cell layer of lobules 1–6. Acidic fibroblast growth factor (FGF‐1) mRNA follows a similar cerebellar expression pattern. Together, the two markers define a sharp boundary in lobule 6, slightly caudal to the primary fissure. Anterior and posterior compartments became discernible only during postnatal weeks two and six, for RPTPρ and FGF‐1, respectively. A rostrocaudal boundary in lobule 6 of the murine cerebellar cortex has also been identified morphologically by the effects of the meander tail mutation. The position of the RPTPρ and FGF‐1 boundary on the rostrocaudal axis of the cerebellar cortex was close to, but not coincident with, the caudal extent of the disorganized anterior lobe of meander tail and the rostral extent of Otx‐2 expression. The restricted pattern of FGF‐1 and RPTPρ implies that these molecules may have specific signaling roles in the tyrosine phosphorylation/dephosphorylation pathway in the anterior compartment of the adult cerebellar cortex. J. Comp. Neurol. 391:444–455, 1998. © 1998 Wiley‐Liss, Inc.