Abstract:
:Oxygen dissociation studies were carried out on red cells and lysates from a patient heterozygous for Hb Hammersmith. The oxygen affinity of the cells at pH 7.1 was decreased, partly by an increased cellular concentration of 2,3-DPG and more importantly by an intrinsic low affinity of Hb Hammersmity. Haem-haem interactions were reduced and an abnormal Bohr effect (pH 7.1-7.4) was found in the cells which would bring about an additional decrease in oxygen affinity at physiological pH. Oxygen dissociation studies on the lysates showed a low oxygen affinity, a normal Bohr effect at 50% saturation, slightly decreased haem-haem interactions and a normal interaction with 2,3-DPG. Estimation of the percentage of Hb Hammersmith in the lysates of the patient's cells by selective precipitation of the abnormal beta chain with p-chloromercuribenzoate (PCMB) showed the presence of 30-33% abnormal haemoglobin. Assuming no interaction between the Hb A and the Hb Hammersmith, oxygen dissociation curves were calculated for Hb Hammersmith alone and these indicated that it has greatly decreased oxygen affinity, a normal Bohr effect, normal 2,3-DPG interaction and (somewhat) decreased haem-haem interactions.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
May A,Huehns ERdoi
10.1111/j.1365-2141.1975.tb00533.xsubject
Has Abstractpub_date
1975-06-01 00:00:00pages
185-95issue
2eissn
0007-1048issn
1365-2141journal_volume
30pub_type
杂志文章abstract::Pegfilgrastim is a pegylated form of the granulocyte-colony stimulating factor, filgrastim. Herein, we report the results of a multicentre, randomized, double-blind phase III trial comparing the efficacy and safety of pegfilgrastim with filgrastim in patients with malignant lymphoma. Patients were randomized to receiv...
journal_title:British journal of haematology
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journal_title:British journal of haematology
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journal_title:British journal of haematology
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pub_type: 杂志文章
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