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New targets for the treatment of vascular diseases and diabetes
1Department of Medicinal Chemistry, University of Kansas, 4070 Malott Hall, Lawrence, KS 66045, USA. schloss@kuhub.cc.ukanss.edu
Abstract:
This symposium was organized by Dan Flynn (Monsanto Life Sciences, USA) and Timothy M Willson (Glaxo Wellcome, USA). PPARs (peroxisome proliferator-activated receptors), are nuclear hormone receptors that govern glucose and lipid homeostasis. There are several subtypes of receptors that share activation by unsaturated fatty acids and work in combination with retinoic acid receptors (RXR), which were a topic covered in an earlier symposium. Two classes of chemistry were discussed at the symposium: (i) thiazolidinediones, that interact directly with PPARs and alter lipid metabolism; and, (ii) benzothiepines or benzothiazepines, that inhibit the ileal bile acid transporter (IBAT) and reduce cholesterol levels by increasing bile acid excretion.
Insights
This symposium explored peroxisome proliferator-activated receptors (PPARs), focusing on how thiazolidinediones alter lipid metabolism and how benzothiepines/benzothiazepines reduce cholesterol by inhibiting bile acid transport.
Area of Science:
- Biochemistry
- Endocrinology
- Pharmacology
Background:
- Peroxisome proliferator-activated receptors (PPARs) are nuclear hormone receptors crucial for glucose and lipid homeostasis.
- PPARs interact with retinoic acid receptors (RXRs) and are activated by unsaturated fatty acids.
- This symposium focused on novel chemical classes targeting PPARs and related pathways.
Purpose of the Study:
- To discuss advancements in understanding PPARs and their role in metabolic regulation.
- To present novel chemical entities affecting lipid metabolism and cholesterol levels.
- To explore therapeutic strategies involving PPAR modulation and bile acid transport inhibition.
Main Methods:
- Discussion of thiazolidinediones as direct PPAR agonists.
- Presentation of benzothiepines/benzothiazepines as inhibitors of the ileal bile acid transporter (IBAT).
- Focus on the interplay between nuclear receptors and metabolic pathways.
Main Results:
- Thiazolidinediones were shown to directly interact with PPARs, altering lipid metabolism.
- Benzothiepines/benzothiazepines were identified as inhibitors of IBAT, leading to reduced cholesterol.
- Increased bile acid excretion was observed as a mechanism for cholesterol reduction.
Conclusions:
- Novel chemical scaffolds offer distinct mechanisms for metabolic control.
- Targeting PPARs and IBAT presents promising therapeutic avenues for metabolic disorders.
- Understanding these pathways is key to developing treatments for dyslipidemia and related conditions.
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