Porphyrin formation and hemoglobin metabolism in congenital porphyria.
نویسندگان
چکیده
The studies reported here were conducted on a patient with congenital porphyria who excretes large amounts of uroporphyrin I and coproporphyrin I. They were directed to the following problems: (a) to determine whether glycine is specifically utilized in the biologic synthesis of porphyrins related to the etioporphyrin I configuration as it is utilized in the synthesis of protoporphyrin which is related to the etioporphyrin III configuration (1) ; (b) to measure the rates of formation (and degradation) or uroporphyrin I and coproporphyrin I; (c) to investigate the life span and pattern of destruction of the erythrocyte and the origins of bile pigment in this disease.
منابع مشابه
Erythropoietic (congenital) porphyria: A rare abnormality of the normoblasts.
ECENT STUDIES” 2, 3 have emphasized that in human beings, photosensitivity occurs as a result of two fundamentally different disturbances of porphyrin metabolism. In porphyria cutanea tarda, in which the excessive porphyrin formation is believed to take place in the liver, symptoms are seldom manifest before adult life.’ Its porphyria erythropoietica (congeisital, photosensitive), where large a...
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N UNUSUAL OPPORTUNITY has l)een affordedi to carry out studlies of porphyrin and! hemoglobin metabolism with the aid of glycine containing N’5 in a 4 year old girl with manifestations of the photosensitive or congenital type of porphyria. Detailed descriptions of the clinical and! biochemical features of this patient are presented in paper I. At the time of the isotope studies anemia and spleno...
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Congenital erythropoietic porphyria is a rare autosomal recessive disorder of porphyrin metabolism in which the genetic defect is the deficiency of uroporphyrinogen III cosynthase (UIIIC). Deficiency of this enzyme results in an accumulation of high amounts of uroporphyrin I in all tissues, leading to hemolytic anemia, splenomegaly, erythrodontia, bone fragility, exquisite photosensitivity, and...
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A 51 -yr-old white male with congenital erythropoietic porphyria (Gunther’s Disease) is described. The disease was first manifested in infancy and mutilating cutaneous photosensitivity eventually developed. The source of excess porphyrin production was a markedly dyserythropoietic bone marrow. The dyserythropoietic changes were most marked in the orthochromic and polychromatophilic normoblasts....
متن کاملStimulators and inhibitors of hepatic porphyrin formation in human sera.
Human sera were found to contain factors that stimulate and factors that inhibit porphyrin formation by cultured avian liver cells. The capacity of sera to stimulate or inhibit porphyrin formation varied in different hormonal states and in the porphyrias. Sera from 31 post partum women, eight of whom were not lactating, inhibited porphyrin formation to a mean level 30% below the level in contro...
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ورودعنوان ژورنال:
- The Journal of biological chemistry
دوره 184 1 شماره
صفحات -
تاریخ انتشار 1950