The effects of endocrine-disrupting chemicals on ovarian- and ovulation-related fertility outcomes.

Exposure to endocrine-disrupting chemicals (EDCs) is unavoidable, which represents a public health concern given the ability of EDCs to target the ovary. However, there is a large gap in the knowledge about the impact of EDCs on ovarian function, including the process of ovulation. Defects in ovulation are the leading cause of infertility in women, and EDC exposures are contributing to the prevalence of infertility.

Hippocampal Gαq/₁₁ but not Gαo-coupled receptors are altered in aging.

Normal aging may limit the signaling efficacy of certain GPCRs by disturbing the function of specific Gα-subunits and leading to deficient modulation of intracellular functions that subserve synaptic plasticity, learning and memory. Evidence suggests that Gαq/₁₁ is more sensitive to the effects of aging relative to other Gα-subunits, including Gαo. To test this hypothesis, the functionality of Gαq/₁₁ and Gαo were compared in the hippocampus of young (6 months) and aged (24 months) F344 × BNF₁ hybrid rats assessed for spatial learning ability.

Cannabinoid receptor activation modifies NMDA receptor mediated release of intracellular calcium: implications for endocannabinoid control of hippocampal neural plasticity.

Chronic activation or inhibition of cannabinoid receptors (CB1) leads to continuous suppression of neuronal plasticity in hippocampus and other brain regions, suggesting that endocannabinoids may have a functional role in synaptic processes that produce state-dependent transient modulation of hippocampal cell activity. In support of this, it has previously been shown in vitro that cannabinoid CB1 receptors modulate second messenger systems in hippocampal neurons that can regulate operation of intracellular processes including receptors which release calcium from intracellular stores. Here we demonstrate in hippocampal slices a similar endocannabinoid action on excitatory glutamatergic synapses via modulation of NMDA-receptor mediated intracellular calcium levels in confocal imaged neurons.

Examination of murine tear film.

Purpose: To define spatially any free aqueous layer in murine tear film.

Method: A pre-zeroed microelectrode was touched to the superficial corneal epithelium and then raised in steps of 1 micro m through the murine tear film into the air and then retraced along the same path. Other murine tear films were partially probed with a spatial resolution of 0.

The National Resident Matching Program and antitrust law.

In May 2002, a group of physicians filed a class action lawsuit alleging that the National Resident Matching Program (NRMP) violates antitrust laws. The plaintiffs contend that NRMP practices have stabilized lower-than-competitive wages and imposed exhausting working conditions on residents. They also maintain that NRMP procedures virtually force applicants for house officer positions to forfeit their right to negotiate for better wages and conditions.