Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0020672 (hypothermia)
 17,327 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A breast-fed boy, born to first-cousin parents, had been vomiting since birth; his general condition remained good until age 6 weeks when vomiting became more frequent, and his status suddenly worsened, with polypnea, shock, hypothermia, jaundice, presence of blood in urine, gastric juice, stool, and bleeding tendency during veno-punctures. There was an huge hepatomegaly and a splenomegaly. Hypoglycaemia, metabolic acidosis, severe blood coagulation disturbances, elevated liver enzymes, hypoalbuminemia, pointed to an acute liver failure. He was resuscitated with current supportive measures, and was given a wide spectrum antibiotherapy. Because serologic tests for syphilis were positive in the child and his mother, including the presence of specific IgM the infant was then given Penicillin G therapy only, which resulted in a complete recovery. One month later, a needle liver biopsy showed residual signs of hepatitis. Other possible infectious or metabolic causes of acute liver failure occurring early in life had been excluded.
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PMID:[Acute hepatic insufficiency disclosing congenital syphilis]. 240 70

Immediate hypersensitivity reaction (IHR) can be divided into allergic- and non-allergic-mediated, while "anaphylaxis" is reserved for severe IHR. Clinically, true penicillin allergy is rare and most reported penicillin allergy is "spurious". Penicillin-initiated anaphylaxis is possible to occur in skin test- and specific IgE-negative patients. The contact system is a plasma protease cascade initiated by activation of factor XII (FXII). Many agents with negative ion surface can activate FXII to drive contact system. Our data showed that penicillin significantly induced hypothermia in propranolol- or pertussis toxin-pretreated mice. It also caused a rapid and reversible drop in rat blood pressure, which did not overlap with IgE-mediated hypotension. These effects could be countered by a bradykinin-B2 receptor antagonist icatibant, and consistently, penicillin indeed increased rat plasma bradykinin. Moreover, penicillin not only directly activated contact system FXII-dependently, but also promoted bradykinin release in plasma incubated-human umbilical vein endothelial cells. In fact, besides penicillin, other beta-lactams also activated the contact system in vitro. Since the autoactivation of FXII can be affected by multiple-factors, plasma from different healthy individuals showed vastly different amidolytic activity in response to penicillin, suggesting the necessity of determining the potency of penicillin to induce individual plasma FXII activation. These results clarify that penicillin-initiated non-allergic anaphylaxis is attributed to contact system activation, which might bring more effective diagnosis options for predicting penicillin-induced fatal risk and avoiding costly and inappropriate treatment clinically.
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PMID:Penicillin causes non-allergic anaphylaxis by activating the contact system. 3284 85