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[Irtitation by smell in the neighborhood of a garbage burning plant].

Dilution threshold values were measured using sensory methods for an evaluation of odorous emissions of an incineration plant. The dispersion of odours was estimated based on recording of the local wind. The level of public annoyance in the neighbouring residential areas will be assessed by special questionnaires.

Refuse Disposal↗

Of apples and oranges, file drawers and garbage: why validity issues in meta-analysis will not go away.

This paper examines how threats to the validity of meta-analysis have been dealt with by clinical researchers employing this approach to literature review. Three validity threats were identified--mixing of dissimilar studies, publication bias, and inclusion of poor quality studies. Approaches to addressing these threats were evaluated for their effectiveness and popularity by surveying 32 published meta-analyses in clinical psychology. Distrust of meta-analysis, however, was found to transcend these validity threats. Other explanations for why this popular research strategy continues to receive widespread criticism were considered. Suggestions were made for how meta-analysis might better address these concerns.

Humans↗

Glycine transporters not only take out the garbage, they recycle.

Two articles in the current issue of Neuron examine the consequences of deleting the two genes that encode glycine transporters. Interestingly, loss of glial transporters enhances while loss of presynaptic neuronal transporters reduces glycinergic transmission. These two opposing phenotypes resemble distinct human diseases characterized by dysfunction in glycinergic signaling.

Amino Acid Transport Systems, Neutral↗

Hassles with taking out the garbage: aggravating aggresomes.

Diverse human diseases ranging from amyloidosis to neurodegenerative diseases are now recognized as 'conformational diseases' caused by protein misfolding and protein aggregation. Misfolded and aggregated proteins are usually handled in the cell through chaperone-mediated refolding, or when that is impossible, destroyed by proteasomal degradation. Recent evidence suggests that cells might have evolved a third pathway that involves the sequestration of aggregated proteins into specialized 'holding stations' called aggresomes. The aggresomal pathway provides a mechanism by which aggregated proteins form particulate (approximately 200 nm) mini-aggregates that are transported on microtubules (MTs) towards the MT organizing center (MTOC) by a process mediated by the minus-end motor protein dynein. Once at the MTOC, the individual particles pack into a single, usually spherical aggresome (1-3 microm) that surrounds the MTOC. Aggresomes are dynamic: they recruit various chaperones and proteasomes, presumably to aid in the disposal of the aggregated proteins. In addition, the formation of an aggresome is likely to activate the autophagic clearance mechanism that terminates in lysosomal degradation. Hence, the aggresome pathway may provide a novel system to deliver aggregated proteins from the cytoplasm to lysosomes for degradation. Although it is clear that many pathological states correlate with the formation of aggresomes, their causal relationships remain hotly debated. Here, we describe the current state of our knowledge of the aggresome pathway and outline the open questions that provide the focus of current research.

Cytoskeleton↗

The role of the M6P/IGF-II receptor in cancer: tumor suppression or garbage disposal?

The mannose 6-phosphate/insulin-like growth factor-II receptor (M6P/IGF-IIR) is an intriguing protein with multiple ligands and multiple functions. Approximately 90 - 95 % of the receptor is located intracellularly, with 5 - 10 % being on the cell surface. It has long been known to play an essential intracellular role in the transport of newly-synthesized lysosomal enzymes from the trans-Golgi network (TGN) to the lysosomes. More recently, however, the loss of this receptor has been described in some tumour types, suggesting that it may play a role in tumour suppression. The focus has therefore shifted to elucidating the role played by the cell surface receptor and its interaction with its diverse ligands in tumour growth and progression. The list of ligands is continuously increasing and includes growth factors such as IGF-II and transforming growth factor beta (TGFbeta). This review will address the question of whether the M6P/IGF-IIR plays a direct role in tumour suppression or merely plays an indirect role as a transporter for ligands designated for degradation in the lysosomes.

Animals↗

Garbage imperialism: health implications of dumping hazardous wastes in Third World countries.

This paper calls for studies of the potential health implications of today's hazardous waste disposal practices, and suggests that such studies are urgently needed in Third World countries where industrial nations are increasingly dumping their unwanted waste materials. The United States produces enormous quantities of hazardous waste each year, and approximately 1,200 "priority hazardous waste sites" presently threaten the nation's health. Because of environmental regulations, landfill closings, and citizen opposition to local waste facilities, industrialized countries are increasingly disposing of their problematic materials by shipping them to the Third World, where they pose substantial threats to human health and the environment. From a political economy perspective, this paper suggests that global health would be better served by reducing hazardous waste production, encouraging reusing and recycling, and restricting or banning international shipment of toxic wastes.

Africa↗