MRI Of the Brain, EEG Sleep Spindles and SPECT in the Early Diagnosis of Infantile Neuronal Ceroid Lipofuscinosis

Two patients with infantile neuronal ceroid lipofuscinosis are presented whose clinical diagnosis was based on the typical clinical picture, together with absent sleep spindles and MRI findings (hypointense thalami and hyperintense periventricular white matter) as early as 18 months in one girl. In addition to a flat cortical SEP, these abnormalities appeared earlier than the typical ERG and VEP findings used previously for clinical diagnosis of this condition. MRI of the other patient showed the same changes and EEG sleep spindles were absent by two years.     

Molecular identification of T cell-specific antigens on human T lymphocytes and thymocytes

We have identified membrane glycoproteins which carry T cell-specific antigens on human T lymphocytes and thymocytes. Purified cells were surface-labeled with NaB³H₄ after treatment with neuraminidase and galactose oxidase. Immunoprecipitations were performed with rabbit anti-human T cell-specific antibodies using co precipitation with protein A-containing staphylococci strain Cowan I. The labeled membrane glycoproteins and the precipitates were subjected to polyacrylamide slab gel electrophoresis and visualized by fluorography. The antibodies specifically precipitated 4 proteins called GP200, GP180, GP165 and GP160 (mol. wts. = 200000, 180000, 165000 and 160000) from surface-labeled T lymphocytes and low-density (medullary) thymocytes. The GP200 and GP180 were not labeled on high-density (cortical) thymocytes. A protein with a mol. wt. of 45000 was precipitated from thymocytes. Another glycoprotein on T lymphocytes and thymocytes with a mol. wt. similar to that of mouse and rat Thy-1 or Θ antigen (mol. wt. 25000) reacted with the antibodies.     

Facilitators and Barriers to the Sustainability of a School-Based Bullying Prevention Program

Prevention Science - The long-term sustainment of bullying prevention programs has rarely been investigated. This study addresses this gap by identifying facilitators and barriers to the systematic...     

Electroencephalographic changes during experimental hangover.

The EEG was recorded in 27 subjects during hangover. Male healthy volunteers drank 1.75 g/kg body weight of ethanol in 3 h and the EEG was recorded 14-16 h later when the degree of hangover was highest. For control purposes a second EEG was recorded after a similar session when subjects drank water instead of ethanol. A third record was taken in normal laboratory conditions. T5-A1 and O1-A1 derivations were subjected to computer analysis from which spectral and frequency parameters were calculated. Visual analysis of the EEG during hangover showed a decrease and slowing of alpha activity and an increase in theta activity. Spectral analysis of the EEG gave a statistically significant increase in 7-8 c/sec activity during hangover. The EEG change could not be explained in terms of blood alcohol level, hypoglycaemia or acidosis. Also fatigue could be excluded as a cause of EEG change by means of "water controls". The conclusion is that the slowing of the EEG during hangover is caused by the depressant action of ethanol, or its metabolites, on cortical function.     

Does periodontitis cause heart disease?

See doi:10.1016/j.ehj.2003.09.016and doi:10.1016/j.ehj.2003.10.007forthe articles to which this editorial refers Several studies investigating the relation between infections—includingdental infections—and various clinical manifestationsof atherosclerotic vessel disease have been published duringthe last decade. The topic has proved difficult to study andthis is especially true for dental infections, as they shareseveral common etiologic factors with e.g. coronary heart disease(CHD). These include smoking,