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Characterization of the expression of the ALK receptor tyrosine kinase in mice

Emma Vernersson1, Nelson K S Khoo, Maria L Henriksson

  • 1Department of Medical Biosciences/Pathology, Building 6M, 2nd Floor, Umeå University, S-901 87 Umeå, Sweden.

Gene Expression Patterns : GEP
|February 7, 2006
PubMed

Insights

Anaplastic Lymphoma Kinase (ALK) is expressed in the developing mouse nervous system, eye, and reproductive organs. This study extensively maps ALK mRNA and protein expression during mouse development.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Neuroscience

Background:

  • Anaplastic Lymphoma Kinase (ALK) was initially identified as a fusion protein in non-Hodgkin's lymphoma.
  • Previous studies indicated ALK expression primarily in the central nervous system (CNS).

Purpose of the Study:

  • To comprehensively characterize the mRNA and protein expression patterns of ALK during mouse development.
  • To identify novel expression sites of ALK beyond the nervous system.

Main Methods:

  • Quantitative real-time PCR (qRT-PCR) for mRNA expression analysis.
  • Western blotting and immunohistochemistry for protein expression analysis.
  • In situ hybridization for spatial localization of mRNA.

Main Results:

  • Overlapping mRNA and protein expression of ALK was observed in specific regions of the central and peripheral nervous systems.
  • ALK expression was detected in the developing eye, nasal epithelium, olfactory nerve, tongue, skin, esophagus, stomach, and midgut.
  • ALK expression was notably absent in the hindgut but present in testis and ovary.

Conclusions:

  • ALK plays a broader role in mouse development than previously understood, extending beyond the nervous system.
  • The diverse expression pattern suggests multiple functions for ALK in various developing tissues.
  • Further research is warranted to elucidate the specific functions of ALK in these newly identified expression sites.

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