Symptomatic glucocorticoid-induced adrenal suppression in the United Kingdom and Ireland: a BPSU study.

Objective: To determine the incidence and describe the presentation and management of unexpected symptomatic glucocorticoid-induced adrenal suppression (AS) in children and young people aged 0-15 years.

Setting And Design: Surveillance study of symptomatic glucocorticoid (GC)-induced AS with supportive biochemical evidence or presenting as an adrenal crisis, reported via the British Paediatric Surveillance Unit (BPSU) from September 2020 to September 2022.

Results: Over a 25-month period, 190 reports of symptomatic GC-induced AS/adrenal crisis were made, of which 22 were confirmed cases: 18 AS and 4 adrenal crises.

Death and survival of gut CD4 T cells following HIV-1 infection ex vivo.

The gastrointestinal tract is ground zero for the massive and sustained CD4 T cell depletion during acute HIV-1 infection. To date, the molecular mechanisms governing this fundamental pathogenic process remain unclear. HIV-1 infection in the gastrointestinal tract is associated with chronic inflammation due to a disrupted epithelial barrier that results in microbial translocation.

The effect of environmental factors on transepithelial potential in a model Amazonian teleost, the tambaqui (Colossoma macropomum): Implications for sodium balance in harsh environments.

The tambaqui (Colossoma macropomum, G. Cuvier 1818) thrives both in the ion-poor waters of the Amazon and in commercial aquaculture. In both, environmental conditions can be harsh due to low ion levels, occasional high salt challenges (in aquaculture), low pH, extreme PO levels (hypoxia and hyperoxia), high PCO levels (hypercapnia), high ammonia levels (in aquaculture), and high and low temperatures.

Iodine Deficiency Exacerbates Thyroidal and Neurological Effects of Developmental Perchlorate Exposure in the Neonatal and Adult Rat.

Thyroid hormones (THs) require iodine for biosynthesis and play critical roles in brain development. Perchlorate is an environmental contaminant that reduces serum THs by blocking the uptake of iodine from the blood to the thyroid gland. Using a pregnant rodent model, we examined the impact of maternal exposure to perchlorate under conditions of dietary iodine deficiency (ID) on the brain and behavior of offspring.

Development of a gradual hypoxia chamber for assessing copper toxicity on air-breathing behavior in .

Behavioral endpoints are of increasing interest in toxicology because of their sensitivity, but require clear guidance for experimental design. This study describes the design of a hypoxia chamber for use with pond snails, . Studies assessing the switch from water- to air-breathing in hypoxic conditions have previously utilized methods that neglect intricacies of animal behavior such as handling stress and acclimation.