Abstract:
:We have demonstrated that oral charcoal therapy is as effective as therapeutic phlebotomy in reducing porphyrinemia in porphyria cutanea tarda. The effects of immediate and sustained reduction of porphyrinemia on the catalytic properties of partially purified (approximately 200-fold) preparations of red cell uroporphyrinogen decarboxylase of a patient with familial porphyria cutanea tarda were studied. All populations of the patient's red cells exhibited defective enzyme activity, and the apparent Michaelis constants (Km) determined with penta-, hepta-, and octa-carboxylic I porphyrinogen substrates were approximately 3-4 times higher as compared to the normal controls. Mixing experiments (normal and defective enzyme), and preincubation of the normal enzyme with porphyric plasma prior to purification, yielded data supporting the concept that the catalytic defects of red cell uroporphyrinogen decarboxylase in familial porphyria cutanea tarda are independent of interactions between circulating endogenous porphyrins and the enzyme.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Mukerji SK,Pimstone NRdoi
10.1016/0006-291x(88)90646-8subject
Has Abstractpub_date
1988-07-15 00:00:00pages
39-46issue
1eissn
0006-291Xissn
1090-2104pii
0006-291X(88)90646-8journal_volume
154pub_type
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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更新日期:1993-04-30 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章,评审
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更新日期:1998-09-08 00:00:00
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journal_title:Biochemical and biophysical research communications
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