Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0085693 (acute appendicitis)
 3,606 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

S100A8 is a major cytoplasmic protein of neutrophils and monocytes/macrophages and has been associated with myeloid cell differentiation and activation. Little is known about its functions or mechanisms of release from neutrophils. We have developed a monoclonal antibody to murine S100A8, which cross-reacts with human S100A8. This antibody, which recognizes the homodimeric form of the protein, detects its expression specifically in human neutrophils and is reactive in formalin-fixed, paraffin-embedded tissues. Using this antibody as well as a commercially available antibody to human S100A8, we show that phagocytic activation of neutrophils, in vivo in acute appendicitis and in vitro following phagocytosis of opsonized zymosan, is characterized by loss of cytoplasmic immunoreactivity for S100A8. In vitro, phagocytosis is associated with rapid diminution of immunostaining without loss of viability. Loss of immunoreactivity for S100A8 may serve as a marker of localized neutrophil activation in tissues.
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PMID:Dimeric S100A8 in human neutrophils is diminished after phagocytosis. 1143 86

A short-cut review was carried out to establish whether measurement of the plasma calprotectin (S100A8/A9) level can be used to enable safe exclusion of acute appendicitis in children presenting to the emergency department with abdominal pain. Four studies were directly relevant to the question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these papers are shown in table 3. The clinical bottom line is that there is currently no evidence to suggest that serum calprotectin is superior to standard inflammatory markers for the exclusion or confirmation of suspected appendicitis. Clinical examination findings remain the cornerstone of surgical decision-making.
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PMID:Towards evidence-based emergency medicine: best BETs from the Manchester Royal Infirmary. BET 3: Super calprotectin will not expedite your discharge. 2387