Effects of B-carotene on glucose metabolism dysfunction in humans and type 2 diabetic rats

Announcing a new review article publication for Acta Materia Medica journal. Type 2 diabetes mellitus (T2DM) is a common chronic disease that is strongly associated with cardiovascular risk. Long-term high blood glucose levels may induce cardiomyocyte apoptosis, cardiac dysfunction and suppress fetal cardiomyocyte proliferation. Recent epidemiological studies have shown a link between antioxidant carotenoids and T2DM, but a comprehensive longitudinal study of this association has not yet been conducted.

The authors of this article included participants with biological measurements for both serum cis-β-carotene and fasting glucose from NHANES (2001–2006). The participants were divided into quartiles according to serum cis-β-carotene levels and determined the association between these levels and glucose metabolism by using multivariable regression models adjusted for confounding factors. The mechanism through which β-carotene levels regulate plasma glucose levels was further investigated in vivo and in vitro. In addition, we performed a preliminary exploration of the effects of β-carotene on diabetic rats and primary cardiomyocytes.

Higher cis-β-carotene (quartile 4) was associated with higher LDL-cholesterol levels but lower fasting blood glucose levels. However, T2DM rats subjected to β-carotene treatment showed diminished total triglycerides and LDL-cholesterol, and their β-carotene levels were associated with better cardiac function than that in the T2DM group (P<0.05). Moreover, β-carotene was found to be an important protective factor improving cardiac and mitochondrial function in diabetes. At non-cytotoxic doses, β-carotene clearly improved glucose uptake in insulin-resistant cells. Treatment with β-carotene increased GLUT4 and p-Akt expression, and attenuated the phosphorylation of IRS-1. Our data demonstrated that β-carotene improved cardiac mitochondria biogenesis in diabetes due to activation of PGC-1β.

The results indicate that β-carotene can be used to treat metabolic disorders through inhibition of the insulin-resistance pathway in diabetes.

Article Reference: Jianjun Wu, Yinan Zhou and Hanqing Hu et al. Effects of β-carotene on glucose metabolism dysfunction in humans and type 2 diabetic rats. Acta Materia Medica. Vol. 1(1):138-153. DOI: 10.15212/AMM-2021-0009

Keywords: β-carotene, diabetes, insulin resistance, AKT/IRS, mitochondria

Acta Materia Medica welcomes the submission of research articles, review articles, databases, mini reviews, commentaries, editorials, short communications, case report articles and study protocols.

Submission Process

Submissions to Acta Materia Medica are made using ScholarOne, the online submission and peer review system. Registration and access are available at https://mc04.manuscriptcentral.com/ammed

Queries about the journal can be sent to editorialoffice@amm-journal.org.

Please visit https://amm-journal.org/ to learn more about the journal.

Editorial Board: https://amm-journal.org/index.php/editorial-board/

There are no author submission or article processing fees.

Follow Acta Materia Medica on Twitter https://twitter.com/AMM_journal  ; Facebook (https://www.facebook.com/AMMjournal)

eISSN 2737-7946