Abstract
Over the past several decades, research on the role of mediators in inflammation, immunity, repair processes, cell growth, and substrate metabolism have centered around the use of purified products of stimulated macrophages. With the current availability of recombinant mediators, the participation of individual monokines in cellular metabolism has been more clearly defined. Interactions among various mediators have been demonstrated, but their exact role in metabolism is currently under intense study. With the use of recombinant monokines, formal evidence for their participation in the acute phase response has been developed. Their use has also assisted in the reinterpretation of data gathered in older studies using purified preparations, which were almost certainly contaminated with several monokines. In this review we will try to give the reader insight into recent advances in the understanding of the role of cellular mediators in relation to nutrition and intermediary metabolism. With a clearer knowledge of the role of cellular mediators in the pathophysiology of disease, it may be possible to develop rationales for their therapeutic use as modulators of substrate metabolism during critical illness.
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