Related Experiment Video
Updated: Jun 13, 2026
The Analysis of Purkinje Cell Dendritic Morphology in Organotypic Slice Cultures
Published on: March 21, 2012
Developmental expression of the cyclin D2 splice variant in postnatal Purkinje cells of the mouse cerebellum
Kosuke Kajitani1, Karim Wafa, Kishore B S Pasumarthi
1Department of Psychiatry, Sir Charles Tupper Medical Building, Dalhousie University, 5850 College Street, Halifax, Nova Scotia B3H 1X5, Canada.
Insights
We studied cyclin D2 and its splice variant D2SV in developing mouse cerebellum. Cyclin D2 peaked early and declined, while D2SV was found in Purkinje cells, suggesting its importance in neuronal development.
Area of Science:
- Neuroscience
- Molecular Biology
- Developmental Biology
Background:
- Cyclin D2 is crucial for cell cycle regulation.
- Splice variants can exhibit distinct functions.
- Postnatal cerebellar development involves complex cellular changes.
Purpose of the Study:
- To compare the expression patterns of cyclin D2 and its splice variant D2SV in the developing mouse cerebellum.
- To investigate the cellular localization of cyclin D2 and D2SV during postnatal development.
- To elucidate the potential role of D2SV in Purkinje cell development.
Main Methods:
- Western blotting to quantify protein levels of cyclin D2 and D2SV.
- Generation of a specific antibody for D2SV detection.
- Immunohistochemistry to determine cellular localization in mouse cerebellum at different postnatal days (P1, P7, P14, P28).
Main Results:
- Cyclin D2 expression peaked at postnatal day 7 (P7) and decreased significantly by P28.
- D2SV was detected as two bands (20kDa and 25kDa), with the 20kDa band constant and the 25kDa band decreasing over time.
- Cyclin D2 was found in nestin-positive cells at P7 and Bergmann glia at P28.
- D2SV immunoreactivity was exclusively localized to Purkinje cells at both P7 and P28.
Conclusions:
- Cyclin D2 and its splice variant D2SV exhibit distinct expression dynamics and cellular localization during mouse cerebellar development.
- The Purkinje cell-specific localization of D2SV suggests a critical role for this splice variant in the postnatal development of these neurons.
- Further research is warranted to fully understand the functional significance of D2SV in cerebellar neurodevelopment.
Abstract:
In the present study, we compared the expression of cyclin D2 and D2SV, the cyclin D2 splice variant, in mouse cerebellum at postnatal day 1 (P1), P7, P14 and P28. Western blotting revealed that cyclin D2 levels (34kDa) peaked at P7 and then decreased to levels near the limit of detection at P28. To detect D2SV, we generated a rabbit polyclonal antibody directed against a C-terminal motif unique to this protein that recognizes two D2SV immunoreactive bands at 20 and 25kDa. Western blotting indicated that levels of the 20kDa band remained constant from P1 to P28 while the intensity of the 25kDa band decreased gradually over this period of time. At P7, cyclin D2 immunoreactivity was evident throughout the cerebellum where it was located in nestin-positive cells. By contrast, at P28, cyclin D2 immunoreactivity was restricted to Bergmann glia whose cell bodies are located in the Purkinje cell layer and processes extend into the molecular layer. Unlike cyclin D2, D2SV immunoreactivity was restricted to Purkinje cells at both P7 and P28. Our observations that D2SV immunoreactivity is localized to Purkinje cells and reflects changing levels of at least two D2SV immunoreactive proteins suggests that this splice variant may play an important role in the postnatal development of these neurons.
Related Concept Videos
02:39Positive Regulator Molecules
02:15M-Cdk Drives Transition Into Mitosis
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...