Deteriorating free radical-trapping capacity and antioxidant status in plasma during bone marrow transplantation.
Bone Marrow Transplant
; 15(5): 757-62, 1995 May.
Article
en En
| MEDLINE
| ID: mdl-7670403
ABSTRACT
Organ toxicity in BMT may in part be due to free radical damage. Therefore the 'Total Radical-trapping Antioxidant Parameter of plasma' (TRAP), individual plasma antioxidants, serum iron and linoleic acid, a main substrate of lipid peroxidation, were monitored before and after BMT, and they were compared with values obtained from healthy controls. Seven patients (3 AML, 3 CML, 1 multiple myeloma) receiving 16 mg/kg busulfan, 30-45 mg VP-16 and 120 mg/kg cyclophosphamide were investigated. TRAP values declined during chemotherapy by about 40% (day -9 1019 +/- 245 mumol/l, mean +/- s.d.; day 0 660 +/- 164 mumol/l; P < 0.05). The concentration of uric acid, one of the main antioxidants in plasma, decreased markedly (day -9 339 +/- 108 mumol/l, day 0 148 +/- 61 mumol/l; P < 0.05) and paralleled TRAP values. Vitamin E and bilirubin did not change from day -9 to 0 whereas vitamin C increased (day -9 46 +/- 16 mumol/l, day 0 89 +/- 44 mumol/l; P < 0.05). Serum iron rapidly increased within the pre-transplantation period, reaching values normally seen only in iron overload (day -9 11.8 +/- 5.2 mumol/l, day 0 40.6 +/- 6.5 mumol/l; P < 0.05). Linoleic acid levels were normal at the start and decreased substantially (27.0 +/- 1.6 wt% at day -9; 15.7 +/- 4.9 wt% at day 0; P < 0.05), indicating possible lipid peroxidation during high-dose chemotherapy. In conclusion, complex monitoring of the antioxidant status before and after BMT revealed a breakdown of plasma antioxidant defence and of radical-vulnerable lipids, which was associated with high circulating levels of iron.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Ácidos Linoleicos
/
Trasplante de Médula Ósea
/
Rechazo de Injerto
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Inmunosupresores
/
Hierro
/
Antioxidantes
Límite:
Adult
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Female
/
Humans
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Male
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Middle aged
Idioma:
En
Revista:
Bone Marrow Transplant
Asunto de la revista:
TRANSPLANTE
Año:
1995
Tipo del documento:
Article
País de afiliación:
Alemania