Abstract：
BACKGROUND:The catalytic contribution of four conserved histidines of human coproporphyrinogen oxidase (CPO) has been investigated using site-directed mutagenesis to change histidine (H) into alanine (A). MATERIAL/METHODS:The wild-type and mutant enzyme forms were analyzed for their ability to utilize coproporphyrinogen-III, mesoporphyrinogen-VI, and harderoporphyrinogen as substrates. RESULTS:Wild-type CPO had specific activities of 4.9+/-0.9 nmole product/min/mg for coproporphyrinogen-III, 1.7+/-0.7 nmole product/min/mg for mesoporphyrinogen-VI, and 5.1+/-1.8 nmole product/min/mg for harderoporphyrinogen. The four mutant enzymes were catalytically competent with all three substrates, but to varying degrees. The most affected mutant was the H158A enzyme which exhibited approximately 50-fold lower activity than wild-type recombinant CPO. CONCLUSIONS:Thus, His158 of human CPO may have a role in the active site, but none of the conserved histidine residues of human coproporphyrinogen oxidase is essential for catalytic activity although changes in histidines have been implicated in the disease state hereditary coproporphyria.
journal_name
Med Sci Monitjournal_title
Medical science monitor : international medical journal of experimental and clinical researchauthors
Gitter SJ,Cooper CL,Friesen JA,Jones MAsubject
Has Abstractpub_date
2007-01-01 00:00:00pages
BR1-10issue
1eissn
1234-1010issn
1643-3750pii
9614journal_volume
13pub_type
杂志文章abstract：BACKGROUND:To observe the effect of QiShenYiQi pill (QSYQ) on experimental autoimmune myocarditis rats, and to explore its mechanism of action. MATERIAL/METHODS:Lewis rats underwent the injection of myocardial myosin mixed with Freund's complete adjuvant were randomized into 3 groups: model, valsartan, and QSYQ groups...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.895655
更新日期：2016-03-06 00:00:00
abstract：:BACKGROUND This study aimed to investigate the association between the rs2975760 and rs3792267 single nucleotide polymorphisms (SNPs) of the calpain 10 (CAPN10) gene and gestational diabetes mellitus. MATERIAL AND METHODS The study included 138 patients with gestational diabetes mellitus and 152 healthy pregnant women...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.914930
更新日期：2019-07-11 00:00:00
abstract：BACKGROUND:The purpose of this article is to point out significant differences in how mental images are processed by post-stroke patients with left and right hemisphere damage. The issues involved are of theoretical importance because of the light shed on the modularity of cerebral functions, especially the imagination...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：
更新日期：2001-07-01 00:00:00
abstract：BACKGROUND:The in vitro interactions of esophageal smooth muscle cells (SMCs) with synthetic absorbable polymers were tested and artificial muscle tissues harvested from subcutaneous implantation were examined. MATERIAL/METHODS:Esophageal tissue samples from adult and fetal (25-day gestational age) rabbits were cut in...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：
更新日期：2007-02-01 00:00:00
abstract：:BACKGROUND Studies on monoamine oxidase B (MAO-B) expression in renal cell carcinoma (RCC) are lacking. This study focused on the immunohistochemical evaluation of MAO-B in RCC. MATERIAL AND METHODS Sixty-three RCC samples were compared on basic clinical and histopathological parameters, including histopathological ty...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.909507
更新日期：2018-08-04 00:00:00
abstract：BACKGROUND:Invasive fungal infections due to Candida species constitute an increasing clinical problem. There are no guidelines for the management of candidemia in children undergoing surgical procedures for congenital heart defects (CHD). The aim of the study was to draw attention to the problem of candidemia in child...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章,评审
doi：10.12659/msm.881751
更新日期：2011-05-01 00:00:00
abstract：BACKGROUND:Prognosis in patients with gastric cancer is determined by the tumor itself, as well as certain patient-related factors. MATERIAL/METHODS:In this study, 138 patients with high-grade gastric adenocarcinoma who were admitted to our hospital between September 1999 and April 2002 were retrospectively evaluated ...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：
更新日期：2006-05-01 00:00:00
abstract：:BACKGROUND The prevalence of peripheral arterial disease (PAD) is increasing worldwide. Currently, there is no effective treatment for PAD. Curcumin is an ingredient of turmeric that has antioxidant, anti-inflammation, and anticancer properties. In the present study we investigated the potential effect of curcumin in ...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.896217
更新日期：2016-06-15 00:00:00
abstract：:BACKGROUND The objective of this paper was to assess the complications following sentinel lymph node biopsy (SLNB) in breast cancer patients using the SentiMag® method. MATERIAL AND METHODS The study material consisted of 368 patients who had received the SLNB procedure in combination with wide local excision (WLE), s...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.912758
更新日期：2019-04-29 00:00:00
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journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.883595
更新日期：2012-12-01 00:00:00
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journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：
更新日期：2000-11-01 00:00:00
abstract：:BACKGROUND The prevalence of chronic pain among the elderly is high (estimated at 25-85%) and may adversely affect their everyday functioning, although it is often unrecognized. MATERIAL AND METHODS The aim of this study was to assess the prevalence of chronic pain, especially with th...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.911260
更新日期：2019-04-12 00:00:00
abstract：:BACKGROUND Interferon alpha (IFNalpha) exerts its anti-proliferative effect on many human cancers. Among the 13 subtypes of human IFNalpha, IFNalpha-1 subtype has 2 variants, named IFNalpha-1a and IFNalpha-1b, that differ from each other in only 1 amino acid, at residue 114. However, the mechanism by which IFNalpha-1a...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.917097
更新日期：2019-09-22 00:00:00
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journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.892990
更新日期：2015-05-13 00:00:00
abstract：BACKGROUND:To examine changes in medicine utilization and prescription trends for diabetic (DM) and hypertensive (HT) patients upon initiation of the National Health Insurance (NHI) global budget (GB) program in Taiwan. MATERIAL/METHODS:Data on hospital-based outpatient prescriptions for DM and HT from the Taipei bran...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：
更新日期：2008-05-01 00:00:00
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journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.910657
更新日期：2018-11-19 00:00:00
abstract：:BACKGROUND Breast cancer is one of the most commonly diagnosed cancers in women worldwide, and sonographic elastography has previously demonstrated good performance in detecting breast malignancies. However, the exact relationship between elastographic measures and clinical prognostic factors is still not well underst...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.918806
更新日期：2019-12-05 00:00:00
abstract：:BACKGROUND Collapsin response mediator protein-2 (CRMP-2) is the first member of the CRMP family that has been identified in primary neuronal cells; it was originally found and identified in the regulation of microtubule dimerization into microtubules. MATERIAL AND METHODS In the present study, we aimed to investigate...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.909056
更新日期：2018-07-18 00:00:00
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journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.914295
更新日期：2019-05-16 00:00:00
abstract：BACKGROUND:Leptin plays an important role in controlling satiety and maintaining energy balance. Acromegaly is characterized by decreased fat, which increases after the disease is cured. Our objective was to investigate serum leptin in acromegaly in terms of disease activity, body fat content, insulin and glucose level...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：
更新日期：2002-10-01 00:00:00
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journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.882524
更新日期：2012-03-01 00:00:00
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journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.895971
更新日期：2016-04-26 00:00:00
abstract：:BACKGROUND To investigate associations of the CA microsatellite and rs35767, rs5742612, and rs2288377 polymorphisms and the single nucleotide polymorphism (SNP) haplotypes with and without the CA microsatellite in the IGF1 promoter with insulin sensitivity and secretion. MATERIAL AND METHODS The CA microsatellite and ...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.902956
更新日期：2017-08-01 00:00:00
abstract：:BACKGROUND Adequate muscle relaxation and rapid recovery of neuromuscular function are essential in the perioperative period. We therefore compared various anesthetic regimens of neuromuscular blockers and antagonists administered to overweight patients undergoing nasopharyngeal surgery. MATERIAL AND METHODS This pros...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.926452
更新日期：2020-09-16 00:00:00
abstract：:The reasons for the steep rise in the prevalence of atopic diseases such as asthma, atopic eczema and allergic rhinitis are unexplained. Studies have shown that immune regulation in the intestinal mucosa-associated lymphoid tissue (MALT) plays an important role in atopic sensitization and is influenced by the intestin...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：
更新日期：2004-02-01 00:00:00
abstract：:BACKGROUND Balloon kyphoplasty (KP) has been widely applied in the treatment of elderly patients with osteoporosis vertebral compression fracture (OVCF), but there has been little research on the pain relief effect. Therefore, we performed this study of patients who received KP. The study included a set of fluoroscopy...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.906456
更新日期：2017-12-18 00:00:00
abstract：BACKGROUND:Tuberculosis is a world-wide public health problem which may clinically present in many different ways. Here we report on a patient with presumed serpiginous choroiditis (PSC) found to have latent ocular tuberculosis. CASE REPORT:The clinical history and physical examination, complete blood count, erythrocy...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.881839
更新日期：2011-07-01 00:00:00
abstract：:BACKGROUND Beta-secretase 1 (BACE1) is a rate-limiting enzyme in the generation of amyloid beta peptides, which are associated with Alzheimer's disease (AD). It has been reported that Schisandrin B could improve cognitive functions in animal models of AD, but the underlying mechanisms are not completely understood. MA...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/msm.905127
更新日期：2018-02-28 00:00:00
abstract：:BACKGROUND MicroRNA-365 (miR-365) is involved in the development of a variety of cancers. However, it remains largely unknown if and how miRNAs-365 plays a role in melanoma development. MATERIAL AND METHODS In this study, we overexpressed miR-365 in melanoma cell lines A375 and A2058, via transfection of miR-365 mimic...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章
doi：10.12659/MSM.909633
更新日期：2018-06-02 00:00:00
abstract：:Endogenous morphine is present in the mammalian brain as determined by gas chromatography/mass spectrometry. The criteria essential for satisfying the definition of morphine as a neurotransmitter are examined. The detection of endogenous morphine-like compounds inside brain neurons by immunocytochemistry and the Ca(+)...
journal_title：Medical science monitor : international medical journal of experimental and clinical research
pub_type： 杂志文章,评审
doi：
更新日期：2005-06-01 00:00:00
