Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P02794 (ferritin)
 17,525 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The response to recombinant human erythropoietin (rHuEPO), 50 units/kg thrice weekly, was studied prospectively in 17 children and adolescents with end-stage renal disease who were either transfusion dependent or had hematocrits < 25%. For convenience, rHuEPO was given intravenously to 12 hemodialysis (HD) patients and subcutaneously to 5 peritoneal dialysis (PD) patients. Blood pressure, hematocrit, iron indices, and serum potassium, calcium, phosphorus, alkaline phosphatase, urea nitrogen, and intact parathyroid hormone (PTH) were monitored serially. When serum ferritin was < 100 ng/ ml during therapy, 6 patients received iron supplementation. rHuEPO therapy eliminated frequent transfusions in all patients; 11 of 17 patients reached the target hematocrit of 30%-33% by week 16 of rHuEPO, 50 units/kg thrice weekly. The 5 PD patients treated subcutaneously reached target at week 6 +/- 1; 6 HD patients treated intravenously reached target at week 11 +/- 3; 6 additional HD patients never reached target at this dose; 5 of 6 had pre-rHuEPO serum PTH levels >400 pg/ml, significantly higher than those of the other patients (P < 0.005); 3 of 6 later reached a hematocrit of 30%-33% after the rHuEPO dose was increased to 120-130 units/kg thrice weekly. We conclude that most pediatric dialysis patients can be treated successfully with rHuEPO, 50 units/kg thrice weekly, unless the serum PTH concentration is markedly elevated, in which case a higher dose is likely to be needed.
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PMID:Effect of hyperparathyroidism on response to erythropoietin in children on dialysis. 965 62

Determining the possible association of viral hepatitis infection and degree of pruritus is the primary concern of this study. Ninety-six adequately dialyzed CAPD patients (47 male and 49 female) and 526 normal controls (266 male and 260 female) were enrolled. Blood hemoglobin, ferritin, electrolytes, calcium, phosphate, albumin, urea, creatinine, aspartate transaminase (AST), alanine transaminase (ALT), alkaline phosphatase, and bilirubin were analyzed by routine methods. Serum HBsAg was examined, using a radioimmunoassay method and the anti-HCV, an enzyme immunoassay method. All cases were interviewed with a standardized questionnaire. The highest possible pruritus score (PS) was 22. The prevalences of HBsAg(+) and anti-HCV(+) were 14.6% and 17.7%, respectively. The mean PS in all 96 CAPD patients was 11.6 (range 7-22). The mean PS were 11.8 +/- 0.6 and 12.5 +/- 1.0 for patients infected with HBV and HCV, respectively. Both were significantly higher than that (10 +/- 0.9) of patients without hepatitis infection. AST and ALT were significantly higher in patients infected with viral hepatitis than those without. The other biochemical parameters were not significant. Thirty-seven (38.5%) of our 96 patients had mild pruritus (PS < or = 7) and 11 (15.9%) had severe pruritus (PS > or = 15). Of the 83.9% (26/31) patients with viral hepatitis, the grades of skin itching were moderate to severe; whereas those of the patients without viral hepatitis, 53.6% (37/69) belonged to the group of moderate to severe pruritus (p = 0.003, chi 2 test with Yates' correction). The authors recommended screening of viral hepatitis infection to be undertaken for uremic patients with unexplained skin itching.
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PMID:Viral hepatitis infection should be considered for evaluating uremic pruritus in continuous ambulatory peritoneal dialysis patients. 968 Nov 57

Increased concentration of serum alkaline phosphatase (ALP) is a common feature in rheumatoid arthritis (RA), although its origin remains unclear. The aim of this study is to analyze the origin and clinical significance of the elevated ALP value in RA. In 123 RA and 63 age- and sex-matched OA (osteoarthropathy) patients, concentrations of total ALP and its isozymes in serum and synovial fluid were studied. Serum CRP, Fe, ferritin, and Cu values were examined, respectively. The expression of ALP as protein was also investigated by using an enzymehistochemical and an immunohistochemical staining methods. Serum ALP values were elevated in 37.4% of RA (245.2 +/- 91.2 IU/L), and significantly higher than those of OA (192.3 +/- 45.2 IU/L: P < 0.01, RA v.s. OA). The serum CRP, and ferritin values each had a relation with the serum ALP activity. Fluid ALP concentration of RA was 110.3 +/- 40.1 IU/L, and that of OA, 83.6 +/- 15.0 IU/L (P < 0.05), respectively. In RA, a predominant isozyme was liver-type one both in the sera (91%) and the synovial fluid (59%). However, this result means that bone-type one was more abundant in the synovial fluids (41%) than those in the sera (9%). An enzymehistochemical and an immunohistochemical studies revealed that ALP was positive in a perivascular area, sublining cells, and a part of vascular endothelium in RA. In contrast, the synovial tissue from OA and a healthy patient exhibited only a weak staining. In RA, a positive correlation between the elevation of serum ALP and the disease activity was confirmed. Furthermore, we elucidated that ALP is produced in RA synovium.
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PMID:[Alkaline phosphatase (ALP) activity in rheumatoid arthritis (RA): its clinical significance and synthesis of ALP in RA synovium]. 978 85

Redox-active forms of iron are known to catalyze free radical mediated peroxidative reactions. There is scanty information on such effects at the sites of iron absorption. This was tested in iron-deficient WKY female rats supplemented for 15 days with FeSO4 equivalent to 8 mg of iron (D+) and compared with iron deficient (D) and iron adequate (C) rats. The levels of intestinal MDA and protein carbonyls and the activities of various antioxidant enzymes were estimated. As markers of functional integrity, the activities of alkaline phosphatase and Lys-Ala-dipeptidyl aminopeptidase were evaluated. In addition, we measured the concentrations of ferritin, transferrin, and ceruloplasmin levels in serum and in intestinal mucosa. It was observed that correction of iron deficiency resulted in significant increase in MDA and protein carbonyl formation. Activities of both alkaline phosphatase and Lys-Ala-dipeptidyl aminopeptidase were significantly decreased in D+ compared to C. The increase in catalase and decrease in Gpx was found to be sensitive to iron administration. Neither iron deficiency nor its correction had any effect on the activity of SOD and GSH levels. Iron supplementation has resulted in decreased mobilization of stored iron as reflected by increased mucosal ferritin level and decreased serum ceruloplasmin ferroxidase activity contributing to greater peroxidative stress in the intestine. These results suggest that iron-deficient intestine of rat is more susceptible to iron-mediated peroxidative damage and functional impairment during correction of deficiency with iron.
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PMID:Iron-deficient intestine is more susceptible to peroxidative damage during iron supplementation in rats. 980 Oct 65

To define which noninvasive investigations are of value in predicting bone histology, we analyzed transiliac bone specimens (66 biopsies, 14 autopsies) from 80 uremic patients on chronic dialysis. Results were compared with values of different measurements of parathyroid hormone (PTH), alkaline phosphatase (APH), osteocalcin, calcitonin, baseline and post-deferroxamine (DFO) aluminium (Al),--beta 2 microglobulin, ferritin and bone mineral density. Among histomorphometric parameters, woven osteoid, active osteoblastic surface and resorption surface showed the best correlations with dynamic and biochemical marks of active bone metabolism. Among biochemical parameters, intact PTH and APH were better related to histomorphometric and dynamic bone parameters than other PTH measurements as well as osteocalcin, while calcitonin was related to no parameters. Stainable Al alone, and not total bone Al content was related to bone histology. Baseline Al was related to lamellar osteoid, while post-DFO Al was related to stainable Al. beta 2 microglobulin was positively related to active osteoid surface and ferritin was inversely related to the mineral apposition rate, while bone mineral density was related only to total bone volume. We conclude that, though definite diagnosis requires the use of histological methods, few simple biochemical parameters may offer insight to the bone metabolic status, useful to the physician in day to day clinical practice.
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PMID:Correlations between bone histopathology and serum biochemistry in uremic patients on chronic hemodialysis. 980 45

Interferon (IFN) is the only drug that has been approved by the FDA for therapy of chronic hepatitis C. However, optimal dose and duration of therapy are still controversial. This study compares the effectiveness of treatment of chronic hepatitis C patients with 3 vs. 5 million units (MU) of recombinant alpha-interferon 2-b three times per week. We also evaluated the relapse rate with a shorter 12 week-course of therapy in those patients who had normalization of aminotransferases by week 12. Seventy-five patients were randomized to receive either 3 vs. 5 MU of IFN; seventy-two completed the study. A complete response was seen in 11/35 (31%) of those treated with 5 MU vs. 13/37 (35%) in the 3 MU dose (p = 0.74). Patients were followed after IFN was withdrawn and only 2 had persistently normal aminotransferases. Analysis of multiple variables was done to predict response to IFN and only elevations of GGT, ferritin and alkaline phosphatase were found to be predictors of a poor response. Therefore, we recommend initial therapy with 3 MU of IFN for a longer period than 12 weeks in patients who show a response.
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PMID:Chronic hepatitis C: treatment comparison between 3 and 5 million units of interferon alpha-2b. 988 67

The results of the determination of 24 basic blood chemistry variables from 262 men and 239 women, half of each group 44.4 +/- 0.9 and 63.0 +/- 0.9 (men) and 44.4 +/- 0.9 and 62.8 +/- 0.8 years old (women), resp., are compared. In men, only 6 analytes show significant differences between the age groups: Alanine aminotransferase decreases, aspartate aminotransferase decreases, iron decreases with p < 0.05; sodium increases, calcium decreases, protein (serum) decreases with p < 0.001. In women, 16 analytes, compared between both groups, are significantly different: Urea, uric acid, creatinine, triglycerides, total cholesterol, LDL cholesterol, LDL-C/HDL-C ratio, alanine aminotransferase, alkaline phosphatase, gamma-glutamyltransferase, sodium and ferritin are increased in the older group, whereas HDL cholesterol, iron, transferrin, and total protein are decreased. The sex differences are more distinct in the group of 44 years old persons than in the 63 years old one. These results will be completed by the comparison with the evaluation of the stored laboratory values of 9923 patients between 20 and 89 years old.
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PMID:[Clinical laboratory diagnosis and aging. 1: Results of data evaluation of clinico-chemical laboratory values in a study of aging]. 1040 12

One of the classic histologic forms of renal osteodystrophy is osteitis fibrosa, and its distinguishing characteristic is bone marrow (BM) fibrosis, caused by the activation of marrow parenchymal cells. A bone biopsy must be performed in order to establish the diagnosis of renal osteodystrophy. The clinical use of bone biopsy is restricted, however, due to the invasiveness of the procedure. In recent studies, bone scans have provided information useful for the differential diagnosis between osteomalacia and osteitis fibrosa. However, bone scans can not provide information on the bone marrow status. Bone marrow immunoscintigraphy (BMIS) using Tc-99m anti-granulocyte antibody (AGA), a highly sensitive test for the detection of bone marrow abnormalities which is also a noninvasive method, has rarely been reported in chronic renal failure (CRF). BMIS can provide information in patients with myelofibrosis. The purpose of this study was to evaluate the usefulness of BMIS in CRF patients with special regards to biochemical parameters. Nineteen CRF patients (13 men, 6 women; mean age: 48 +/- 11 years) in whom bone scintigraphy using Tc-99m MDP (methylene diphosphonate) showed the so-called superscan pattern were included in the study. Their primary renal diseases were chronic glomerulonephritis (n = 14), diabetes (n = 4), and polycystic kidney disease (n = 1). Modes of therapies were continuous ambulatory peritoneal dialysis (CAPD) (n = 13; mean duration: 9.5 months), HD (n = 5; mean duration: 7.8 months), and conservative treatment (n = 1). BMIS using Tc-99m labeled anti-granulocyte monoclonal mouse antibody BW250/183 was performed, and the results were compared with the biochemical parameters of the patients. According to the presence of BM expansion, which may represent marrow fibrosis, the 19 patients were divided into two groups: Group I (n = 7) with BM expansion and Group II (n = 12) with normal marrow distribution. The biochemical parameters and bone markers of Group I were compared with those of Group II. There was no significant difference in biochemical parameters (blood hemoglobin, serum ferritin, erythropoietin, BUN, creatinine) between the two groups. There were no significants difference in serum calcium, phosphorus, tartate-resistant acid phosphatase (TRAP), and intact parathyroid hormone (iPTH) between the two groups. Serum alkaline phosphatase (ALP) and osteocalcin were significantly (P < 0.05) higher in Group I than in Group II. These results suggest that patients with bone marrow expansion in BMIS have increased levels of ALP and osteocalcin, indicating an increased osteoblastic activity. BMIS may be useful for the detection of bone marrow expansion due to marrow fibrosis in renal osteodystrophy, and for the evaluation of the extent of bone marrow fibrosis.
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PMID:Bone marrow immunoscintigraphy (BMIS): a new and important tool for the assessment of marrow fibrosis in renal osteodystrophy? 1064 20

Ferritin and ferritin-binding proteins in canine serum were characterized. A certain percentage of ferritin in canine serum, but no tissue ferritin, was precipitated by centrifugation at 16,000 x g for 30 min. The precipitated ferritin was found to contain two subunits corresponding to the H and L subunits of canine liver ferritin by immunoblotting, the H subunit being predominant. More ferritin was precipitated from canine sera which had been incubated with anti-rat liver ferritin antibody than from untreated sera, and the H chain also predominated. To evaluate the possibility that the autoantibody was responsible for the precipitation of canine serum ferritin, the ferritin-binding activities of canine antibodies were examined using liver ferritin-coated microtiter plates and alkaline phosphatase-labeled antibodies specific for canine IgM, IgA, and IgG heavy chains. The results showed that IgM and IgA, but not IgG, had considerable ferritin-binding activities. Given these results, we suggest that there is H-chain-rich isoferritin in canine serum, and that ferritin exists as an immune complex.
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PMID:Characterization of ferritin and ferritin-binding proteins in canine serum. 1083 Dec 25

Polyclonal antibodies (PAb) prepared against bovine milk alkaline phosphatase (ALP) were used to develop a competitive indirect (CI) ELISA. Anti-ALP PAb were specific for milk ALP and did not react with ALP from E. coli or bovine and calf intestinal mucosa. Anti-ALP PAb were 20% cross-reactive with bovine placenta ALP. The anti-ALP antibodies also did not recognize bovine serum albumin, acid glycoprotein, ovalbumin, ferritin, and casein, although some cross-reactivity was observed with whey protein isolate. Anti-ALP PAbs reacted with deglycosylated native ALP, but did not recognize ALP denatured at 100 degrees C in 2% SDS or deglycosylated denatured ALP. When buffered solutions of milk ALP were heated at 70 degrees C, ALP activity decreased at a faster rate than ALP content determined by CI-ELISA. The ELISA differentiated between native and heat denatured ALP. Further studies are warranted to determine if an ELISA can be used to verify pasteurization of fluid milk.
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PMID:Polyclonal-antibody-based ELISA to detect milk alkaline phosphatase. 1088 3


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