Tier 4 — mechanistic

Plasma phospholipid transfer protein activity is inversely associated with betaine in diabetic and non-diabetic subjects

R P F Dullaart, Erwin Garcia, Elias Jeyarajah, Eke G Gruppen, Margery A Connelly
Lipids in health and disease 2016 15(1):143

Bibliography

PubMed
PMID 27581838
PubMed Central
PMC5007837
Funding
Reported funding/support: No financial support from an external agency was used for this study.
Competing interests
Reported disclosure: Competing interestsThis study is investigator initiated. EG, EJ and MAC are employees of Laboratory Corporation of America® Holdings (LabCorp). Betaine measurements were performed by LabCorp (Raleigh, North Carolina, USA) at no cost.

Study snapshot

DesignCross-sectional metabolic study
ModelHuman participants
Sample65 adults with type 2 diabetes and 55 without
InterventionMeasured betaine status and related metabolites; no randomized TMG treatment
DurationSingle plasma analysis
EndpointsLipoprotein metabolism; PLTP

What the study showed, in plain terms

Published in 2016, this source examined human observational and biomarker research. Design: Cross-sectional metabolic study. Sample/model: 65 adults with type 2 diabetes and 55 without. The exposure or intervention was Measured betaine status and related metabolites; no randomized TMG treatment. Follow-up or treatment period: Single plasma analysis.

Higher betaine was associated with lower phospholipid-transfer-protein activity and a more favorable selected lipid pattern.

Observational exposure analysis: residual confounding and reverse causation remain possible. Associations do not establish that betaine supplementation causes the same outcome.

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Key findings

  • Higher betaine was associated with lower phospholipid-transfer-protein activity and a more favorable selected lipid pattern.
  • The recorded outcome domains were Lipoprotein metabolism; PLTP.
  • The exposure was observed rather than assigned as an isolated supplement treatment.

What this study can and cannot tell us

  • Observational exposure analysis: residual confounding and reverse causation remain possible. Associations do not establish that betaine supplementation causes the same outcome.
  • Confounding, dietary patterns, illness, medication use and reverse causation can influence an association. Blood or dietary concentrations do not identify the effect of starting a capsule.
  • Source basis: Accessible full-text extract plus indexed bibliographic data. Missing method details, funding information or participant denominators are not inferred.

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