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Dp71ab/DAPs complex composition changes during the differentiation process in PC12 cells.

J Romo-Yáñez1, V Ceja, R Ilarraza-Lomelí

  • 1Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del IPN, Avenida Instituto Politécnico Nacional 2508, Apartado Postal 14-740, C.P. 07000, Ciudad de México, México.

Journal of Cellular Biochemistry
|March 29, 2007
PubMed
Summary
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This study reveals how Dp71ab protein complexes change during nerve growth factor (NGF) induced neuronal differentiation in PC12 cells. The findings suggest Dp71ab may play a role in neuronal signaling pathways.

Area of Science:

  • Cell Biology
  • Neuroscience
  • Molecular Biology

Background:

  • PC12 cells exhibit alternative splicing, producing Dp71 isoforms like Dp71ab, which lacks specific exons.
  • Understanding the function of Dp71 isoforms is crucial for comprehending cellular processes, particularly during neuronal differentiation.

Purpose of the Study:

  • To identify dystrophin-associated proteins (DAPs) interacting with Dp71ab in PC12 cells during NGF-induced differentiation.
  • To elucidate the dynamic changes in the Dp71ab protein complex composition upon neuronal differentiation.

Main Methods:

  • Reverse transcription polymerase chain reaction (RT-PCR) to analyze mRNA expression of DAPs.
  • Western blot analysis to detect protein expression of DAPs and complex formation.
  • Indirect immunofluorescence to visualize protein localization.

Related Experiment Videos

Main Results:

  • Expression of alpha-, beta-, gamma-, delta-, epsilon-, and zeta-sarcoglycans, beta-dystroglycan, alpha1-syntrophin, and alpha1-/beta-dystrobrevins was confirmed.
  • Dp71ab formed a complex with beta-dystroglycan, alpha1-syntrophin, beta-dystrobrevin, and alpha-, beta-, gamma-sarcoglycans in undifferentiated cells.
  • Upon NGF treatment, the Dp71ab complex composition shifted to include delta-sarcoglycan, and neuronal nitric oxide synthase associated with the complex.

Conclusions:

  • Dp71ab protein complex composition undergoes significant alterations during NGF-induced PC12 cell differentiation.
  • The association of neuronal nitric oxide synthase with the Dp71ab complex suggests a potential role for Dp71ab in signal transduction pathways during neuronal development.