Early handling can attenuate adverse effects of fetal ethanol exposure

The effects of early handling on physiological and hormonal responses of rats exposed to ethanol prenatally were studied. Male and female Sprague-Dawley rats from prenatal ethanol (E), pair-fed (PF), and ad lib-fed control (C) prenatal treatment groups were either handled (H) or nonhandled (NH) during the preweaning period and tested in adulthood. Early handling eliminated the deficit in preweaning weight gain observed in E compared to PF and C offspring. In adulthood, early handling eliminated the increased hypothermia observed in E and PF compared to C males following an ethanol challenge (2.0 g/kg, IP). In addition, H males displayed marginally less hypothermia overall than NH males. In contrast, handling accelerated the return to preinjection temperature in PF and C females but had no effect on E females. There were no significant differences among E, PF, and C rats in corticosterone (CORT) responses to ethanol challenge (1.5 g/kg, IP), but both males (marginally) and females in the H condition displayed higher CORT levels overall than NH rats. Early handling also eliminated the increased peak CORT response to restraint stress in E compared to C females, but did not affect the more prolonged elevation of CORT in E compared to PF and C females. There were no differences among E, PF, and C females in hippocampal type I and type II glucocorticoid receptor density or affinity. However, binding affinity of type II receptors was slightly but significantly increased in H compared to NH females. Together, these data indicate that early handling may modulate or attenuate some, but not all, of the adverse effects of fetal ethanol exposure on offspring growth and physiological responsiveness.

Public health, epidemiology and war

The delivery of humanitarian aid in wartime is difficult. However, it is essential that aid is provided in the most effective manner possible, targeted on those most in need whilst minimizing waste. Furthermore the delivery of aid should be sensitive to the future needs of the communities in conflict. This requires information on the needs of the vulnerable population. There is little experience of collecting data on the impact of war on a civilian population. The war in Bosnia disrupted surveillance of communicable disease. The local authorities were assisted by the World Health Organization in re-establishing surveillance. The data generated was valuable in planning interventions to minimise the possibility of major outbreaks of infection, reduce the impact of infectious disease and in guiding the humanitarian aid effort. The experience described suggests that public health surveillance of the civilian population in wartime is possible and useful. Besides the need for planning, the public health doctor in wartime has a role as an advocate for those suffering; this function can be carried out much more effectively if it is based on objective data collection rather than hearsay.

Role of natural killer cells in psychosocial stressor-induced changes in mouse mammary tumor growth

We have shown that social housing conditions affect the growth rate of the androgen-responsive Shionogi mouse mammary tumor (SC115) and differentially stimulate splenic natural killer (NK) cell activity. Mice reared in a social group and then singly housed (GI) following tumor cell injection have increased tumor growth rates and increased NK cell activity, whereas mice reared individually and then group housed following tumor cell injection have decreased tumor growth rates and decreased NK cell activity compared to that in mice remaining in their rearing group. The present study was undertaken to determine whether NK cells are involved in mediating the effects of social housing conditions on SC115 tumor growth rates. We demonstrate that the presence of the SC115 tumor significantly stimulates the activity of NK cells at the tumor site in the first 7 days after tumor cell injection, and that, consistent with the data on splenic NK cells, mice of the GI group (largest tumors) have significantly greater levels of NK cell activity than mice reared individually and then group housed (smallest tumors). We further demonstrate that in mice of the GI group, in vivo stimulation of NK cell activity by polyinosinic:polyCMP correlates with a corresponding increase in tumor growth rate. These findings suggest that NK cell activity may play a role in mediating the increased tumor growth rate observed in mice of the GI housing condition.

Effect of isradipine in black patients with very severe hypertension. 24-hour ambulatory blood pressure monitoring and echocardiographic evaluation

Fifty consecutive black patients with very severe hypertension (sitting diastolic blood pressure > or = 120 mm Hg and systolic > or = 210 mm Hg by the conventional cuff method) were treated in an open-label study (without a placebo or active drug control group) for 3 months with a long-acting preparation of isradipine (Dynacirc SRO), during which time serial changes in 24-h ambulatory blood pressure monitoring (ABPM), left ventricular (LV) mass index, and LV systolic function were evaluated. Mean 24-h ABPM was reduced from 184 +/- 13/119 +/- 6 to 148 +/- 18/96 +/- 11 mm Hg at 3 months (P < .0001). The reduction in BP was sustained for 24 h after dosing. Simultaneous BP measurements using a conventional cuff method and Dinamap were significantly different from the ABPM pre- and posttherapy, suggesting a marked "white coat" pressor effect. LV mass index regressed from 143 +/- 36 to 122 +/- 32 g/m2 at 3 months (P < .02). Heart rate and mean body weight were unchanged. Left ventricular performance was not adversely affected. Cardiac index and fractional shortening changed insignificantly, from 2.6 +/- 0.6 to 2.7 +/- 0.5 L/min/m2, and from 28 +/- 6 to 31 +/- 7%, respectively. Adverse effects were few and tended to disappear during the treatment period. All of the clinical laboratory parameters tested remained unchanged. We conclude that in this group of patients long-acting isradipine 1) showed a marked and sustained antihypertensive action demonstrated by 24-h ABPM; and 2) was well tolerated and associated with LV mass regression without adverse effect on systolic cardiac function.(ABSTRACT TRUNCATED AT 250 WORDS)

Prenatal ethanol exposure: susceptibility to convulsions and ethanol's anticonvulsant effect in amygdala-kindled rats

The present experiments assessed the effects of prenatal ethanol exposure on the susceptibility to convulsions and on the anticonvulsant effect of ethanol using the electrical kindling model of epilepsy in rats. Adult male Sprague-Dawley rats from prenatal ethanol (E), pair-fed (PF), and ad libitum-fed control (C) treatment groups were tested following the implantation of a stimulation electrode in the left amygdala complex. The same rats were tested in four consecutive experiments. Both E and PF rats showed a slightly slower rate of kindling than C rats, as measured by convulsion class but not as measured by forelimb clonus duration (experiment 1). However, the groups did not differ significantly in the electrical stimulation threshold for kindled convulsions (experiment 2). Furthermore, prenatal ethanol exposure had no significant effect on the dose-response curve for ethanol's (0, 0.9, 1.1, 1.3, and 1.5 g/kg, ip) anticonvulsant effect (experiment 3), or on the rate of tolerance development to ethanol's (1.5 g/kg, ip) anticonvulsant effect (experiment 4) on kindled convulsions. Thus, prenatal exposure to ethanol does not appear to have long-term effects on the susceptibility to convulsions or on the anticonvulsant effect of ethanol in adult male rats in the kindling model as used in the present experiments.