How does TXNIP control muscle glucose uptake?
Human studies show TXNIP is repressed by insulin, induced by glucose, elevated in dysglycaemia, and can inhibit peripheral glucose uptake.
Source
TXNIP regulates peripheral glucose metabolism in humans
Study at a glance
- Design
- Human experiment — Euglycemic-hyperinsulinemic clamp gene-expression studies plus genetics and cellular work
- N
- Studies A/B: six nondiabetic volunteers each; study C: 96 young nondiabetic twins; plus adipocyte culture — no single primary analytic N
- Population
- Nondiabetic volunteers and twins undergoing clamp muscle biopsies; cellular validation
- Outcome
- Insulin regulation of TXNIP and relation to insulin-stimulated glucose uptake
Structured fields used in claim comparison tables when every cited study has a complete layer.
What they did
Investigators combined euglycemic-hyperinsulinemic clamps, muscle gene expression, genetics, and cellular work to identify insulin-responsive genes and test TXNIP’s role in human glucose metabolism.
What they found
TXNIP (with BCL6) was consistently repressed by insulin; TXNIP is reciprocally regulated by insulin and glucose, elevated in T2DM/prediabetes, inversely related to insulin-stimulated glucose uptake in non-diabetic people, and can inhibit glucose uptake when elevated.
The limits
What it doesn't show
TXNIP genetic variation did not explain inherited T2DM risk here; this is mechanistic physiology, not a drug trial.
Key terms
- TXNIP
- Thioredoxin-interacting protein regulating redox signalling and glucose uptake.
- Euglycemic hyperinsulinemic clamp
- Gold-standard method to measure insulin-stimulated glucose disposal.
- Insulin resistance
- Impaired insulin action on glucose uptake/production.
- Peripheral glucose uptake
- Glucose disposal into tissues such as skeletal muscle and fat.
- Prediabetes
- Intermediate dysglycaemia before overt T2DM.
Flashcards
Research intelligence for this paper
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Quiz yourself
TXNIP here is mainly a regulator of:
Common questions
What happens to TXNIP with insulin?
Expression is repressed.
What happens with high glucose?
TXNIP is part of reciprocal glucose/insulin regulation and elevations can inhibit uptake.
Is TXNIP higher in T2DM?
Yes—consistently elevated in T2DM and prediabetes.
Does TXNIP genotype drive T2DM risk here?
Authors report variation does not predispose inherited T2DM risk despite physiologic role.
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