Altered expression of ano1 variants in human diabetic gastroparesis

Amelia Mazzone, Cheryl E. Bernard, Peter R. Strege, Arthur Beyder, Luis J V Galietta, Pankaj J. Pasricha, James L. Rae, Henry P. Parkman, David R Linden, Joseph H. Szurszewski, Tamas Ordog, Simon J. Gibbons, Gianrico Farrugia

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Diabetes affects many organs including the stomach. Altered number and function of interstitial cells of Cajal (ICC), the gastrointestinal pacemaker cells, underlie a number of gastrointestinal motility disorders, including diabetic gastroparesis. In the muscle layers, ICC selectively express Ano1, thought to underlie classical Ca2+-activated Cl- currents. Mice homozygous for Anol knock-out exhibit abnormal ICC function and motility. Several transcripts for Anol are generated by alternative splicing of four exons. Here, we report expression levels of transcripts encoded by alternative splicing of Anol gene in gastric muscles of patients with diabetic gastroparesis and nondiabetic control tissues. Expression of mRNA from two alternatively transcribed exons are significantly different between patients and controls. Furthermore, patients with diabetic gastroparesis express mRNA for a previously unknown variant of Anol. The 5' end of this novel variant lacks exons 1 and 2 and part of exon 3. Expression of this variant in HEK cells produces a decreased density of Ca2+-activated Cl- currents that exhibit slower kinetics compared with the full-length Anol. These results identify important changes in expression and splicing of Anol in patients with diabetic gastroparesis that alter the electrophysiological properties of the channel. Changes in Anol expression in ICC may directly contribute to diabetic gastroparesis.

Original languageEnglish (US)
Pages (from-to)13393-13403
Number of pages11
JournalJournal of Biological Chemistry
Volume286
Issue number15
DOIs
StatePublished - Apr 15 2011

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Gastroparesis
Interstitial Cells of Cajal
Exons
Alternative Splicing
Muscle
Stomach
Pacemakers
Messenger RNA
Medical problems
Muscles
Gastrointestinal Motility
Genes
Cells
Tissue
Kinetics

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Cite this

Mazzone, A., Bernard, C. E., Strege, P. R., Beyder, A., Galietta, L. J. V., Pasricha, P. J., ... Farrugia, G. (2011). Altered expression of ano1 variants in human diabetic gastroparesis. Journal of Biological Chemistry, 286(15), 13393-13403. https://doi.org/10.1074/jbc.M110.196089

Altered expression of ano1 variants in human diabetic gastroparesis. / Mazzone, Amelia; Bernard, Cheryl E.; Strege, Peter R.; Beyder, Arthur; Galietta, Luis J V; Pasricha, Pankaj J.; Rae, James L.; Parkman, Henry P.; Linden, David R; Szurszewski, Joseph H.; Ordog, Tamas; Gibbons, Simon J.; Farrugia, Gianrico.

In: Journal of Biological Chemistry, Vol. 286, No. 15, 15.04.2011, p. 13393-13403.

Research output: Contribution to journalArticle

Mazzone, A, Bernard, CE, Strege, PR, Beyder, A, Galietta, LJV, Pasricha, PJ, Rae, JL, Parkman, HP, Linden, DR, Szurszewski, JH, Ordog, T, Gibbons, SJ & Farrugia, G 2011, 'Altered expression of ano1 variants in human diabetic gastroparesis', Journal of Biological Chemistry, vol. 286, no. 15, pp. 13393-13403. https://doi.org/10.1074/jbc.M110.196089
Mazzone A, Bernard CE, Strege PR, Beyder A, Galietta LJV, Pasricha PJ et al. Altered expression of ano1 variants in human diabetic gastroparesis. Journal of Biological Chemistry. 2011 Apr 15;286(15):13393-13403. https://doi.org/10.1074/jbc.M110.196089
Mazzone, Amelia ; Bernard, Cheryl E. ; Strege, Peter R. ; Beyder, Arthur ; Galietta, Luis J V ; Pasricha, Pankaj J. ; Rae, James L. ; Parkman, Henry P. ; Linden, David R ; Szurszewski, Joseph H. ; Ordog, Tamas ; Gibbons, Simon J. ; Farrugia, Gianrico. / Altered expression of ano1 variants in human diabetic gastroparesis. In: Journal of Biological Chemistry. 2011 ; Vol. 286, No. 15. pp. 13393-13403.
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