Articles in 2009

Aspirin is probably the most commonly used drug worldwide and has major analgesic, antipyretic and antiplatelet activities. Data from the Physicians' Health Study now suggest that regular use of low-dose aspirin might help reduce the risk of type 2 diabetes mellitus by around 14% in otherwise healthy men.

Traditional methods of male contraception, such as condoms and vasectomy, are unacceptable to many couples as they can be unreliable or the effects not easily reversed. Depot administration of male hormonal contraception could provide a safe, effective, reliable and reversible alternative, report researchers in China.

Evidence of gradual increases in serum concentration of C-peptide as pregnancy progresses in women with type 1 diabetes mellitus provides novel insight into mechanisms of β-cell failure and regeneration, and the potential role of C-peptide in diabetes mellitus and health.

The traditional view of nonclassic congenital adrenal hyperplasia is that affected individuals are not glucocorticoid-deficient. The results of a French study now cast doubts on this assumption, however, and raise important issues for classification and management of patients with this common genetic disorder.

Intensive insulin therapy to maintain tight glucose control is associated with reduced morbidity and mortality in adult patients hospitalized with critical illnesses. Can the same rationale also be applied to critically ill children admitted to the pediatric intensive-care unit?

Although previous studies unequivocally demonstrated that type 2 diabetes mellitus (T2DM) has a strong genetic component, the genes that contribute to the risk of this disease were largely unknown until recently, owing to the complexity of genetic and environmental interactions that are involved in T2DM. Genome-wide association studies, which provide global searches throughout the entire genome, have greatly improved our understanding of the genetic background of diabetes mellitus. Here, the authors discuss the currently available findings of diabetes-related genome-wide association studies and examine the utility of the genetic loci identified in these studies as predictors of T2DM.

Whilst less than 5% of pituitary tumors are familial, identification of familial pituitary tumor syndromes is important owing to the associated pathologies that might occur and the important implications for family members. Advances have been made in our understanding of these syndromes in the past decade and four genes have now been identified as being associated with familial pituitary tumors:MEN1, CDKN1B, PRKAR1A and AIP. This article reviews the current state of knowledge of familial pituitary tumor syndromes.

Noninvasive imaging modalities are increasingly used to study various aspects of diabetes mellitus. The authors of this article focus on the application of MRI, a modality that can provide not only anatomical and functional but also molecular information, for monitoring islet transplantation. Potential causes of islet graft failure, and novel technologies for the simultaneous imaging and delivery of experimental therapies to prevent such failure are also discussed.

The role of sex steroids in the regulation of bone metabolism has been extensively studied in women; however, less is known about their skeletal effects in men. On the basis of associations between serum estradiol levels, bone metabolism and fracture risk in adult men and skeletal symptoms in young men with estrogen resistance or aromatase deficiency, the authors suggest a crucial role for estradiol in regulating skeletal growth and health in men.

An organism's ability to adjust its phenotypic development to the environment is partly determined by epigenetic changes that are established in early life and modulate gene expression during development and maturity. A mismatch between the inducing and the mature environment may result in inappropriate patterns of epigenetic marks and of gene expression that increase the organism's susceptibility to chronic noncommunicable disease. The authors review the relationships between environmental influences during mammalian development, epigenetic changes and metabolic and cardiovascular diseases, and discuss the implications for prevention and treatment.

Physical or emotional effects that potentially threaten homeostasis activate various compensatory mechanisms coordinated by the stress system. This article provides an overview of the conceptual evolution and current understanding of homeostasis and stress, the main effectors and targets of the stress response and the effects of stress on the organism.

Peptide-receptor radionuclide therapy (PRRT) with radiolabeled somatostatin analogs, such as octreotide, is a promising option for the treatment of somatostatin-receptor-positive endocrine tumors. Here, van Essen et al. evaluate data from preliminary studies of PRRT, and discuss the pros and cons of this approach. The authors propose that PRRT might soon become the treatment of choice for patients with metastatic or inoperable endocrine tumors.