title: Influence of diet on experimental toxicity of amphotericin B deoxycholate.
abstract: The effects of pre- and postprandial levels of lipids in serum on the experimental in vivo and in vitro toxicities of amphotericin B deoxycholate (AmB-d) were studied. Normal OF1 mice were tested at baseline, after normal feeding, after 3 h of fasting, or after a sequence of feeding and fasting and vice versa. The 50% lethal dose (LD50) of AmB-d was significantly higher in fed mice than in mice which fasted or at baseline (2.38 +/- 0.12 versus 1.53 +/- 0.2 and 1.50 +/- 0.1 mg/kg of body weight, respectively; P < 0.05). When different nutritional regimens were alternated over a short period, the level of in vivo AmB-d toxicity was dictated by the last feeding regimen. Serum triglycerides, but not cholesterol in very-low-density and low-density lipoproteins, correlated significantly (P < 0.01) with the LD50 of AmB. In vitro experiments showed that the addition of human serum reduced AmB-d-induced toxicity against human erythrocytes, but serum drawn after fasting was less protective than postprandial serum. However, neither serum decreased the in vitro activity of AmB-d against Candida albicans. Circular dichroism, a method that enables the amount of free AmB to be measured, showed that both mouse and human total serum lipoproteins bound more AmB-d when serum was isolated postprandially than when it was obtained after fasting. Our results show that AmB-d toxicity is reduced by feeding-induced modifications in serum lipids. The influence of food intake on the clinical toxicity of the drug merits being investigated.
authors.affiliation: Institut National de la Santé et de la Recherche Médicale, Unité 13, Faculté Xavier Bichat, Paris, France.
authors.forename: P
authors.initials: P
authors.lastname: Chavanet
authors.forename: V
authors.initials: V
authors.lastname: Joly
authors.forename: D
authors.initials: D
authors.lastname: Rigaud
authors.forename: J
authors.initials: J
authors.lastname: Bolard
authors.forename: C
authors.initials: C
authors.lastname: Carbon
authors.forename: P
authors.initials: P
authors.lastname: Yeni
mesh_terms: D000666:Amphotericin B / Q000737:chemistry / Q000633:toxicity*; D000818:Animals; D000935:Antifungal Agents / Q000737:chemistry / Q000633:toxicity*; D002176:Candida albicans / Q000187:drug effects; D002784:Cholesterol / Q000097:blood; D002942:Circular Dichroism; D003840:Deoxycholic Acid / Q000737:chemistry / Q000633:toxicity*; D004032:Diet; D004338:Drug Combinations; D004435:Eating; D004912:Erythrocytes / Q000187:drug effects; D005215:Fasting / Q000502:physiology; D006801:Humans; D066298:In Vitro Techniques; D008055:Lipids / Q000097:blood; D008074:Lipoproteins / Q000097:blood; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D014280:Triglycerides / Q000097:blood
chemical_list: D000935:Antifungal Agents; D004338:Drug Combinations; D008055:Lipids; D008074:Lipoproteins; D014280:Triglycerides; D003840:Deoxycholic Acid; D000666:Amphotericin B; C059765:amphotericin B, deoxycholate drug combination; D002784:Cholesterol