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Mol Cell Endocrinol. 2018 Jan 15;460:134-151. doi: 10.1016/j.mce.2017.07.015. Epub 2017 Jul 20.

Isoalantolactone derivative promotes glucose utilization in skeletal muscle cells and increases energy expenditure in db/db mice via activating AMPK-dependent signaling.

Author information

1
Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research, New Delhi 110001, India.
2
Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.
3
Pharmacokinetics and Metabolism Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.
4
Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.
5
Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research, New Delhi 110001, India. Electronic address: akhilesh_tamrakar@cdri.res.in.

Abstract

Augmenting glucose utilization and energy expenditure in skeletal muscle via AMP-activated protein kinase (AMPK) is an imperative mechanism for the management of type 2 diabetes. Chemical derivatives (2a-2h, 3, 4a-4d, 5) of the isoalantolactone (K007), a bioactive molecule from roots of Inula racemosa were synthesized to optimize the bioactivity profile to stimulate glucose utilization in skeletal muscle cells. Interestingly, 4a augmented glucose uptake, driven by enhanced translocation of glucose transporter 4 (GLUT4) to cell periphery in L6 rat skeletal muscle cells. The effect of 4a was independent to phosphatidylinositide-3-kinase (PI-3-K)/Akt pathway, but mediated through Liver kinase B1 (LKB1)/AMPK-dependent signaling, leading to activation of downstream targets acetyl coenzyme A carboxylase (ACC) and sterol regulatory element binding protein 1c (SREBP-1c). In db/db mice, 4a administration decreased blood glucose level and improved body mass index, lipid parameters and glucose tolerance associated with elevation of GLUT4 expression in skeletal muscle. Moreover, 4a increased energy expenditure via activating substrate utilization and upregulated the expression of thermogenic transcription factors and mitochondrial proteins in skeletal muscle, suggesting the regulation of energy balance. These findings suggest the potential implication of isoalantolactone derivatives for the management of diabetes.

KEYWORDS:

Energy metabolism; Glucose utilization; Insulin resistance; Inula racemosa; Isoalantolactone

PMID:
28736255
DOI:
10.1016/j.mce.2017.07.015
[Indexed for MEDLINE]

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