Effects of poor and short sleep on glucose metabolism and obesity risk
Karine Spiegel,
Esra Tasali,
Rachel Leproult
&
Eve Van Cauter
p253 | doi:10.1038/nrendo.2009.23
Sleep curtailment, which has become a common behavior in modern society, and sleep disorders, such as obstructive sleep apnea, might have detrimental effects on endocrine functions and glucose metabolism. This review discusses the role of sleep loss and poor-quality sleep in the development of obesity and diabetes mellitus, and highlights the importance of screening for sleep problems in patients with endocrine and metabolic disorders.
Incretin-based therapies for type 2 diabetes mellitus
Julie A. Lovshin
&
Daniel J. Drucker
p262 | doi:10.1038/nrendo.2009.48
Incretin-based drugs have several advantages over commonly used antidiabetic agents, including a glucose-dependent mechanism of action and no risk of weight gain. However, their long-term efficacy, safety and durability are yet to be established. This Review summarizes the available data on the mechanisms of action of currently used and emerging incretin-based agents.
Is it possible to reduce cardiovascular risk with glucose-lowering approaches?
Hertzel C. Gerstein
p270 | doi:10.1038/nrendo.2009.49
Glucose control does not have a clear cardiovascular benefit in people with established, long-duration diabetes mellitus; however, it reduces the risk of diabetes-related eye disease and kidney disease, myocardial infarction and mortality in those with recent-onset diabetes mellitus. Here, the author discusses the relationship between blood glucose level and cardiovascular disease and compares the cardiovascular effects of various glucose-lowering drugs and strategies.

Fibrosis and carcinoid syndrome: from causation to future therapy
Maralyn Druce,
Andrea Rockall
&
Ashley B. Grossman
p276 | doi:10.1038/nrendo.2009.51
Carcinoid tumors are characterized by their ability to secrete hormones, such as serotonin, tachykinins and other mediators that might contribute to carcinoid syndrome. The authors of this Review describe the incidence and prevalence of carcinoid tumor related fibrosis, which is a major complication of this syndrome, and explore the role of potential causative agents.