期刊
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nano.2020.102357
关键词
Obesity; Inflammation; Insulin resistance; Chitosan nanomicelles; RNA interference
资金
- National Institutes of Health (NIH) [R15GM114701]
- North Dakota Established Program to Stimulate Competitive Research (ND EPSCoR) [FAR0030636]
Localized knockdown of pro-inflammatory adipocytokines in adipose tissue macrophages and adipocytes using RNA interference can reduce inflammatory cytokine levels and increase insulin-sensitizing adipokine levels in obese-diabetic mice, improving insulin sensitivity and glucose tolerance for up to six weeks following a single dose.
Obesity induced chronic low-level inflammation is strongly associated with the development of insulin resistance and progression of type-2 diabetes. Systemic treatment with anti-inflammatory therapeutics requires high doses and is associated with serious adverse effects owing to generalized suppression of the immune system. Here we study localized knockdown of pro-inflammatory adipocytokines in adipose tissue macrophages (ATMs) and adipocytes using RNA interference for the treatment of insulin resistance. Chitosan nanomicelles conjugated to ATM and adipocyte targeting ligands were used to transfect short hairpin RNA (shRNA) against tumor necrosis factor-alpha (TNF alpha) and monocyte chemoattractant protein-1 (MCP-1). Subcutaneous administration of nanomicellar/pDNA polyplexes in obese-diabetic mice resulted in decreased concentration of pro-inflammatory cytokines TNF alpha, MCP-1, IL-6, and IL-1 beta along with increased concentration of insulin-sensitizing adipokine adiponectin. Downregulation of inflammatory cytokines resulted in improved insulin sensitivity and glucose tolerance for up to six-weeks following single dose, compared to untreated obese-diabetic mice. (C) 2021 Elsevier Inc. All rights reserved.
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