Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0016382 (flushing)
 6,387 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The high levels of delta-aminolevulinate synthetase (ALA-S) in Rhodopseudomonas palustris cells grown anaerobically in the light (Ph) decrease to those found in cells grown aerobically in the dark (A), when the former cultures were vigorously oxygenated; simultaneously bacteriochlorophyll (Bchl) synthesis abruptly halted leading to diminished steady-state specific Bchl content. When flushing oxygen was interrupted, enzymic activity increased, whether chloramphenicol was present or not in the medium; if the protein synthesis inhibitor was added when oxygenation started, ALA-S declined in the same fashion as in its absence, but thereafter reactivation of the enzyme was lower than before. Succinyl-CoA-synthetase and ALA-dehydratase activities were also measured under the conditions described, and no changes at all have been observed. The existence of different forms of ALA-S in R. palustris depending on growth conditions is postulated along with the formation of low molecular weight factors which can modulate ALA-S activity by binding to the enzyme; a widespread mechanism in the adaptation of micro-organisms to changes in environment. It is also proposed that this particular regulatory phenomenon, could be referred to as a switch off/on mechanism controlling ALA-S activity in R. palustris.
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PMID:Porphyrin biosynthesis in Rhodopseudomonas palustris--XII. delta-Aminolevulinate synthetase switch-off/on regulation. 359 86

We report a case of a 45-year-old woman who presented with facial erythema, papules, pustules, and severe flushing consistent with rosacea. The patient had failed standard pharmacologic treatments. The patient's flushing was so severe that she had undergone an elective sympathectomy. She received 6 sessions of photodynamic therapy (PDT) with 5-aminolevulinic acid (ALA as Levulan Kerastick, Dusa Pharmaceuticals) given at 2-week intervals. Improvement was evident after the second treatment and was considered "excellent" after the sixth treatment. Improvement continued and no flares were observed 1 month after the final treatment.
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PMID:Photodynamic therapy for the treatment of erythema, papules, pustules, and severe flushing consistent with rosacea. 1648 74