Cited by 59Metabolism, Diabetes, and CancerGlycogen Storage Diseases and MyoclonusDiabetes, Cardiovascular Risks, and Lipoproteins

Cloning of a Human Insulin-Stimulated Protein Kinase (ISPK-1) Gene and Analysis of Coding Regions and mRNA Levels of the ISPK-1 and the Protein Phosphatase-1 Genes in Muscle From NIDDM Patients

Abstract

Complementary DNA encoding three catalytic subunits of protein phosphatase 1 (PP1α, PP1β, and PP1γ) and the insulin-stimulated protein kinase 1 (ISPK-1) was analyzed for variations in the coding regions related to insulin-resistant glycogen synthesis in skeletal muscle of 30 patients with non-insulin-dependent diabetes mellitus (NIDDM). The human ISPK-1 cDNA was cloned from T-cell leukemia and placental cDNA libraries and mapped to the short arm of the human × chromosome. Single-strand conformation polymorphism (SSCP) analysis identified a total of six variations in the coding regions of the PP1 genes: two in PP1α at codons 90 and 255; one in PP1γ at codon 67; and three in PP1γ at codons 11,269, and 273, respectively. All were, however, silent single nucleotide substitutions. SSCP analysis of the ISPK-1 gene identified one silent polymorphism at codon 266 and one amino acid variant at codon 38 (Ile→Ser). This variant was primarily found in one male NIDDM patient. This subject, however, did not exhibit an impairment of muscle insulin-stimulated glycogen synthase activation. No significant differences were found in mRNA levels in muscle of the four genes between 15 NIDDM patients and 14 healthy subjects. Our findings suggest that 1) genetic abnormalities in the coding regions of PP1α, PP1β, PP1γ, and ISPK-1 are unlikely to be frequently occurring causes of the reduced insulin-stimulated activation of the glycogen synthesis in muscle from the analyzed group of NIDDM patients; 2) the mRNA levels of PP1α, PP1β, PP1γ, and ISPK-1 are normal in muscle from the NIDDM patients; and 3) putative inherited defects in insulin-stimulated activation of muscle glycogen synthesis in patients with insulin-resistant NIDDM may be located further upstream of ISPK-1 in the insulin action cascade.

Integrity signals

Registry

Crossref · 10.2337/diab.44.1.90

Cites

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • No structural gene abnormalities in the catalytic subunit of PP1 were detected in Pima Indians with type 2 diabetes.

    “No structural gene abnormalities in the catalytic subunit of PP1 were detected in Pima Indians.”

    From Pathogenesis of insulin resistance in skeletal muscle (2010) · cites this paper as [226]

  • In Danish type 2 diabetic subjects, several silent nucleotide substitutions were found in the PP1 and ISPK-1 genes.

    “Several silent nucleotide substitutions were found in the PP1 and ISPK-1 genes in the Danish population”

    From Pathogenesis of insulin resistance in skeletal muscle (2010) · cites this paper as [226]

  • In Danish type 2 diabetic subjects, skeletal muscle mRNA levels of the PP1 and ISPK-1 genes were normal.

    “the mRNA levels of both genes were normal in skeletal muscle.”

    From Pathogenesis of insulin resistance in skeletal muscle (2010) · cites this paper as [226]

Cites

Still being checked.

Cited by

Sorted by citations

Authors
Bjørbæk, C., Vik, T. A., Echwald, S. M., Yang, P.-Y., Vestergaard, H., Wang, J. P., Webb, G. C., Richmond, K., Hansen, T., Erikson, R. L., Gabor Miklos, G. L., Cohen, P. T. W., & Pedersen, O.
Affiliations
  • Novo Nordisk (Denmark) (DK)
  • Indiana University School of Medicine (US)
  • Harvard University (US)
  • Queen Elizabeth Hospital (AU)
  • The Australian National University Canberra, Australia
  • University of Dundee (GB)
Venue
Diabetes
Published
1995-01-01
Volume
44
Issue
1
Pages
90-97
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2069100646
Cited by
59
References
0
Citations by year
2023: 1 · 2018: 2 · 2017: 1 · 2015: 2 · 2014: 1 · 2013: 2
FWCI
2.58
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Funders
  • National Institutes of Health (5r35ca042580-14)
  • National Cancer Institute (CA 42580)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD-00874)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Glycogen Storage Diseases and Myoclonus
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
protein phosphatase 1, type 2 diabetes, skeletal muscle, insulin resistance, glycogen synthesis, glycogen synthase activation, silent polymorphism, X chromosome, mRNA levels, cDNA cloning
MeSH terms
Amino Acid Sequence, Base Sequence, Biopsy, Cloning, Molecular, Diabetes Mellitus, Type 2, Female, Gene Expression Regulation, Glycogen Synthase, Humans, Male, Middle Aged, Molecular Sequence Data, Phosphoprotein Phosphatases, Polymorphism, Genetic, RNA, Messenger, Blotting, Northern, Gene Expression Regulation, Enzymologic, Polymerase Chain Reaction, Protein Serine-Threonine Kinases, DNA, Complementary, Muscle, Skeletal, Ribosomal Protein S6 Kinases, Protein Phosphatase 1

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review