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1.
West Indian Med J ; 64(4): 400-6, 2015 Sep.
Article in English | MEDLINE | ID: mdl-26624595

ABSTRACT

OBJECTIVE: The aim of this study was to assess the impact of turmeric cream on the healing of Caesarean wound. METHODS: This study was done as a randomized double blind trial in three groups on women who had a Caesarean operation. The redness, oedema, ecchymosis, drainage, approximation (REEDA) scale was used to evaluate the wound healing process. The χ², analysis of variance (ANOVA) and Tukey tests were used for statistical analysis. RESULTS: Seven days after the surgery, the averages of REEDA score in the intervention, placebo and control groups were respectively, 0.46, 0.88, and 1.17 (p < 0.001), while on day 14, it was 0.03, 0.22 and 0.36 (p < 0.001), showing a significant statistical difference. Similarly, there was a difference between the intervention and placebo groups in the amount of oedema on the 7th and 14th days after the surgery (respectively, p = 0.066 and p < 0.001). The observed difference between the intervention and control groups in the amount of oedema was statistically significant on the 7th and 14th days after the surgery (p < 0.001). CONCLUSION: Turmeric was effective in faster healing of wounds of Caesarean operation. The use of turmeric is suggested to reduce the complications of the wounds from Caesarean section.

2.
Biochim Biophys Acta ; 713(3): 504-11, 1982 Dec 13.
Article in English | MEDLINE | ID: mdl-6817810

ABSTRACT

The activity of highly purified preparations of human plasma lecithin: cholesterol acyltransferase were stabilized by precipitating the enzyme with ammonium sulfate and using the dilutions of the particulate lecithin: cholesterol acyltransferase suspension for enzyme assays. Ammonium sulfate concentrations in the assay mix up to 0.1 M had no significant effect on lecithin: cholesterol acyltransferase activity. The basic enzymatic properties of lecithin: cholesterol acyltransferase were investigated using liposomes and high density lipoprotein (HDL) substrates. pH optima for both substrates was approximately 8.0. The temperature dependence of lecithin: cholesterol acyltransferase activity resulted in non-linear Arrhenius plots with both substrates. The activity vs. temperature (degrees C) curves showed slight inflections at 30 degrees C, which may have been due to the relatively rapid inactivation of the enzyme above this temperature. HDL3 was found to be a better substrate than HDL or HDL2. HDL3 was also considerably better than egg phosphatidylcholine/cholesterol liposomes as an lecithin: cholesterol acyltransferase substrate. Addition of HDL2 to a reaction mix of enzyme and HDL3 indicated that HDL2 acts as an inhibitor of cholesterol esterification in this system.


Subject(s)
Apolipoproteins , Lipoproteins, HDL , Liposomes , Phosphatidylcholine-Sterol O-Acyltransferase/blood , Phosphatidylcholines , Apolipoprotein A-I , Cholesterol , Humans , Kinetics , Substrate Specificity
3.
Bone Marrow Transplant ; 50(4): 517-22, 2015 Apr.
Article in English | MEDLINE | ID: mdl-25599168

ABSTRACT

This study presents the pediatric hematopoietic SCT (HSCT) activity in Iran between 1991 and 2012. Overall, 1105 fifteen-year-old or younger patients have undergone HSCT (975 allogeneic and 130 autologous). Annual HSCTs have been increasing steadily since 2007. HLA-matched siblings and other related donors were the main source of HSCs, although since 2008 a national HLA registry has been established to fill the gap for patients lacking a related donor. Inherited abnormalities of RBCs (45.88%), leukemias (27.6%) and BM failure syndromes (11.94%) constituted the majority of HSCTs during this period. Two-year overall survival and disease-free survival rates for all patients were 74.2% (95% confidence interval (CI): 71.6-77) and 66.3% (95% CI: 63.5-69.3), respectively. Leading cause of death in allogeneic group was TRM (165 deaths) and relapse caused the majority of deaths in the autologous group (39 deaths). All HSCTs from the beginning have been performed exclusively with TBI-free-conditioning regimens, which provides unique data for comparison with activities of other centers. Encouraging survival rates provide a basis for future studies on the extensive applicability of TBI-free-conditioning regimens in pediatric HSCT.


Subject(s)
Hematologic Diseases , Hematopoietic Stem Cell Transplantation , Neoplasms , Unrelated Donors , Adolescent , Allografts , Autografts , Child , Child, Preschool , Disease-Free Survival , Female , Hematologic Diseases/mortality , Hematologic Diseases/therapy , Humans , Infant , Iran , Male , Neoplasms/mortality , Neoplasms/therapy , Retrospective Studies , Survival Rate
4.
Semin Oncol ; 28(2): 153-7, 2001 Apr.
Article in English | MEDLINE | ID: mdl-11301377

ABSTRACT

Esophageal cancer is among the 10 most frequent cancers in the world. Iran is one of the known areas with a high incidence of esophageal cancer. Most of the patients in Iran have been reported from the north and northeast regions of the country. In one survey by the Iran Cancer Institute, 9% of all cancers and 27% of gastrointestinal cancers were esophageal carcinoma. The male to female ratio was 1.7/1. The distal portion of the esophagus is involved more often than other parts. Consumption of wheat flour, exposure to residues from opium pipes, drinking hot tea, and chewing nass (a mixture of tobacco, lime, ash, and other ingredients) are the suspect etiologic agents for esophageal cancer in Iran. Dysphagia, weight loss, anorexia, abdominal pain, and odynophagia are the common symptoms and signs of Iranian patients with esophageal cancer. For clinical staging, chest computed tomographic scanning is performed. Adenocarcinoma of the esophagus is not as common in Iran as in western countries. Public education, nutritional support, and eradication of opium addiction may decrease the morbidity and mortality that result from esophageal cancer. Surgery has traditionally been the mainstay of esophageal cancer treatment in Iran. Radiotherapy is mainly used postoperatively. The usual combination chemotherapy regimen is cisplatin plus flurouracil (5-Fu). Semin Oncol 28:153-157.


Subject(s)
Developing Countries , Esophageal Neoplasms/epidemiology , Esophageal Neoplasms/diagnosis , Esophageal Neoplasms/prevention & control , Esophageal Neoplasms/therapy , Female , Humans , Iran/epidemiology , Male , Risk Factors
5.
Bone Marrow Transplant ; 13(6): 743-4, 1994 Jun.
Article in English | MEDLINE | ID: mdl-7920308

ABSTRACT

Seventy-three BMT procedures (42 allogeneic-BMT, 30 autologous-BMT, 1 syngeneic transplant) were undertaken at the Shariati Hospital in Tehran between March 1991 and November 1993. Allogeneic-BMT was performed for thalassaemia major (n = 23), AML in complete remission (n = 3), severe aplastic anaemia (n = 7), CML (n = 7), dyskeratosis congenita (n = 2) and Fanconi anaemia (n = 1). Conditioning regimens comprised busulphan (BU) plus cyclophosphamide (CY) or CY only. Thirty-two (78%) of the 43 patients remain alive 1-34 months after BMT. Twelve patients died: the causes of death were haemorrhagic cystitis (n = 1), CMV pneumonitis (n = 1), GVHD (n = 3), infection (n = 3), rejection (n = 1), VOD (n = 2) and hepatitis (n = 1). Autologous-BMT was performed for patients with AML in CR (n = 16), ALL in CR (n = 9), lymphoma in relapse (n = 3), Ewing sarcoma (n = 1) and multiple myeloma (n = 1). The median age was 18 years. Conditioning regimens were Ara C plus CY, etoposide plus CY and high-dose melphalan. Sixteen (54%) of the 30 patients survive, 14 in continuous complete remission. The causes of death were relapse (AML (n = 7), ALL (n = 4), lymphoma (n = 1)), VOD (n = 1) and infection (n = 1).


Subject(s)
Bone Marrow Transplantation , Adolescent , Adult , Anemia, Aplastic/epidemiology , Anemia, Aplastic/therapy , Bone Marrow Transplantation/economics , Busulfan/therapeutic use , Child , Combined Modality Therapy , Cyclophosphamide/therapeutic use , Cytarabine/therapeutic use , Drug Therapy, Combination , Female , Financing, Personal , Graft vs Host Disease/epidemiology , Humans , Insurance, Health, Reimbursement , Iran/epidemiology , Lymphoma/epidemiology , Lymphoma/therapy , Male , Melphalan/therapeutic use , Middle Aged , Transplantation, Autologous , Transplantation, Homologous , beta-Thalassemia/physiopathology , beta-Thalassemia/therapy
6.
Bone Marrow Transplant ; 23(3): 299-301, 1999 Feb.
Article in English | MEDLINE | ID: mdl-10084264

ABSTRACT

Dyskeratosis congenita is recognized by its dermal lesions and constitutional aplastic anemia in some cases. We report successful allogeneic bone marrow transplantation in two siblings with this disease from their sister, and their long term follow-up. We used reduced doses of cyclophosphamide and busulfan for conditioning instead of total body irradiation. Also, we report late adverse effects of transplantation which are not distinguishable from the natural course of disease.


Subject(s)
Anemia, Aplastic/therapy , Bone Marrow Transplantation , Dyskeratosis Congenita/complications , Adolescent , Adult , Anemia, Aplastic/etiology , Bone Marrow Transplantation/adverse effects , Busulfan , Chronic Disease , Cyclophosphamide , Diagnosis, Differential , Disease Progression , Dyskeratosis Congenita/genetics , Erythema/etiology , Esophageal Stenosis/etiology , Female , Follow-Up Studies , Graft vs Host Disease/diagnosis , Graft vs Host Disease/etiology , Humans , Immunosuppressive Agents/therapeutic use , Male , Nuclear Family , Tissue Donors , Transplantation Conditioning , Transplantation, Homologous
7.
Bone Marrow Transplant ; 22(12): 1167-9, 1998 Dec.
Article in English | MEDLINE | ID: mdl-9894719

ABSTRACT

This study concerns the effects of several pre-transplant features on outcome for patients with beta thalassemia major who underwent bone marrow transplantation (BMT). Seventy patients with beta thalassemia major underwent bone marrow transplantation during the period 1991-1997 in Shariati Hospital in Tehran, Iran. The survival and rejection curves levelled off at 8 and 18 months after transplantation at 82.6% and 11.4%, respectively. Pre-transplant clinical features (age, serum ferritin, portal fibrosis, hepatomegaly and quality of chelation therapy) were examined for their effects on survival and recurrence of thalassemia in this group of patients who were less than 16 years old. Increasing age, presence of portal fibrosis and increasing serum ferritin were significantly associated with reduced probability of survival (P = 0.0047, P = 0.016 and P = 0.024, respectively). Hepatomegaly and inadequate pre-transplant chelation therapy which were documented as poor prognostic factors in previous studies, were not evaluable in this study. We also showed the benefits of transplanting more than 5.5 x 10(8)/kg cells in this group of patients with no increase in complications.


Subject(s)
Bone Marrow Transplantation , beta-Thalassemia/therapy , Adolescent , Age Factors , Child , Child, Preschool , Female , Ferritins/blood , Graft Rejection , Graft Survival , Humans , Iran , Male , Prognosis , Risk Factors
8.
Transplant Proc ; 36(10): 3190-3, 2004 Dec.
Article in English | MEDLINE | ID: mdl-15686726

ABSTRACT

We retrospectively evaluated the association between risk factors and acute graft-versus-host disease (aGVHD) among 182 beta thalassemia patients who received 73 peripheral blood stem cell (PBSC) or 109 bone marrow transplants from HLA-identical siblings between 1991 and 2003. The relationship between the severity of aGVHD was examined for the following factors: HLA antigens, age, sex, ABO mismatch, sex mismatch (between recipient and donor), thalassemia class, graft source, transplant cell dose, CD3+ cell dose, conditioning regimen, GVHD prophylaxis, neutrophil engraftment duration, and blood product transfusions using univariate and multivariate analyses. Overall 61 (34%) patients developed clinical grade III or grade IV aGVHD. Univariate analysis confirmed an increased risk of severe aGVHD, which was associated with HLA-A11, HLA-A26, and PBSCT (P=.04, .03, and .03, respectively). The risk of aGVHD was reduced in the presence of HLA-A3 (P=.03). Multivariate analysis confirmed the increased risk of aGVHD associated with HLA-A11 (P=.04), HLA-A26 (P=.01), and a short-period neutrophil recovery (P=.009). In this study HLA-A11, HLA-A26, PBSCT, and a short neutrophil engraftment period were probable risk factors and HLA-A3 a probable protective factor associated with severe aGVHD. These data may provide useful guidelines to choose strategies for treatment and prevention.


Subject(s)
Graft vs Host Disease/epidemiology , HLA Antigens/immunology , Stem Cell Transplantation , Thalassemia/immunology , Thalassemia/therapy , ABO Blood-Group System , Adolescent , Adult , Blood Group Incompatibility , Child , Child, Preschool , Female , Histocompatibility Testing , Humans , Living Donors , Male , Nuclear Family , Platelet Transfusion , Retrospective Studies , Risk Factors
9.
Transplant Proc ; 35(8): 3101-4, 2003 Dec.
Article in English | MEDLINE | ID: mdl-14697989

ABSTRACT

INTRODUCTION: Radiation and cytotoxic chemotherapy can provoke short- and long-term endocrine dysfunction. We studied the prevalence of thyroid, parathyroid, gonadal, and pancreatic beta-cell function in patients undergoing bone marrow transplantation (BMT). MATERIALS AND METHOD: Forty-six patients (12 women, 34 men), aged 1.5 to 49 years (mean, 15.1 years), were evaluated for thyroid, parathyroid, gonadal, and pancreatic beta-cell function before and 3, 6, and 12 months after BMT with a little busulfan-cyclophosphamide conditioning regimen. RESULTS: Thyroid and parathyroid function was unaltered by BMT. Leydig cell function was normal in 11 adult men (G5P5) before and at 3, 6, and 12 months after BMT, but injury to the germinal epithelium (oligo- or azoospermia) was seen before and 12 months after BMT. There was no relationship between serum FSH and germinal epithelial injury. Maturation was normal in six boys (G2P2 or G3P3 at BMT) 12 months post-BMT. Primary hypogonadism was seen in four adult women (B5P5) after BMT. One 14-year-old girl continued to have regular menstrual periods during the 24 months after BMT. Another girl (P1B1 pre-BMT) developed ovarian failure 12 months post-BMT. Pancreatic beta-cell function was normal pre- and post-BMT in 12 thalassemic patients with serum ferritin > 1000 ng/mL. CONCLUSION: BMT with chemotherapy-only conditioning seems primarily to affect gonadal function, without having any significant effect on thyroid, parathyroid, or pancreatic beta-cell function.


Subject(s)
Bone Marrow Transplantation/physiology , Islets of Langerhans/physiology , Leukemia/surgery , Parathyroid Glands/physiology , Adolescent , Adult , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Child , Child, Preschool , Female , Follow-Up Studies , Glucose Tolerance Test , Humans , Infant , Leukemia/drug therapy , Leydig Cells/physiology , Male , Middle Aged , Multiple Myeloma/drug therapy , Multiple Myeloma/surgery , Ovary/physiology , Reference Values , Testis/physiology , Thalassemia/drug therapy , Thalassemia/surgery , Thyroid Function Tests , Time Factors , Transplantation, Autologous , Transplantation, Homologous
10.
Mil Med ; 164(2): 136-7, 1999 Feb.
Article in English | MEDLINE | ID: mdl-10050572

ABSTRACT

Surgical treatment of wounded soldiers in the field began in World War II, and the care of the wounded was aided by air, ground, and marine transportation. Even with highly developed facilities, medical care should be started as soon as possible. The Islamic Republic of Iran was under an economic blockade during its war with Iraq. Field hospitals were considered a solution to the problem of transportation shortages. The aim of this study was to assess the surgical interventions of these hospitals. In a descriptive cross-sectional study, data for 7,718 patients admitted to field hospitals (among a total of 173,823 casualties) were analyzed. A checklist was used as the data-collection tool. The data were entered and analyzed by the Statistical Program for the Social Sciences. The type of surgical intervention, duration of the surgery, and frequency of the interventions in each hospital were examined. Laparotomy was the most common and tracheostomy the least common intervention. Shahid Baghaei Field Hospital had the greatest number of admissions. Of all the patients in the Southern Command District who underwent any kind of surgery, 21.53% were operated on in the complex of field hospitals. The surgery time in these hospitals was 156 +/- 69 minutes (mean +/- SD). A great number of the procedures were lifesaving (including laparotomy and chest tube insertion). It seems that these hospitals played a key role in reducing mortality and morbidity during the war.


Subject(s)
Hospitals, Military , Military Medicine/statistics & numerical data , Military Personnel/statistics & numerical data , Surgical Procedures, Operative/statistics & numerical data , Warfare , Cross-Sectional Studies , Humans , Iran , Iraq , Patient Admission/statistics & numerical data
12.
J Acquir Immune Defic Syndr ; 53(2): 273-5, 2010 Feb.
Article in English | MEDLINE | ID: mdl-20104123

ABSTRACT

OBJECTIVE: To measure HIV prevalence and characterize associated risk behaviors among injection drug users (IDU) upon detention in Tehran, Iran. METHODS: A cross-sectional survey included 459 male IDU arrested by police during a police sweep in Tehran in 2006. A questionnaire was completed, and blood was collected for HIV testing. RESULTS: Overall HIV prevalence was 24.4% (95% confidence interval 20.5-28.6). Factors independently associated with HIV infection included history of using an opioid in jail (adjusted odds ratio 2.11, 95% confidence interval 1.26-3.53) and older age (adjusted odds ratio 2.79 for 25-34, 3.01 for 35-44, 4.62 for > or = 45 yr). CONCLUSIONS: This study supports that incarceration is contributing to the increased spread of HIV. Harm reduction programs should be urgently expanded, particularly among incarcerated IDU.


Subject(s)
HIV Infections/complications , HIV Infections/epidemiology , Substance Abuse, Intravenous/complications , Adolescent , Adult , Cross-Sectional Studies , Humans , Iran/epidemiology , Male , Middle Aged , Prevalence , Risk Factors , Young Adult
13.
Transplant Proc ; 41(7): 2895-7, 2009 Sep.
Article in English | MEDLINE | ID: mdl-19765466

ABSTRACT

BACKGROUND: Occurrence of chronic kidney disease (CKD) after hematopoietic cell transplantation (HCT) is rare with relatively few reported cases. The aim of this study was to evaluate the frequency of CKD among patients who received HCT for hematologic and nonhematologic disorders. OBJECTIVE: We performed a prospective study to evaluate the frequency of CKD and its risk factors. Between 1997 and 2006 there were 1693 patients engrafted at the Bone Marrow Transplant Research Center. METHOD: CKD was defined as a doubling of serum creatinine level from the baseline and after 1 year from receiving a transplantation. The risk of CKD in relation to a non-based total body irradiation conditioning regimen, the type of graft (allograft autograft), and the incidences of graft-versus-host disease (GVHD), drug toxicity, and veno occlusive disease (VOD) were examined in 1963 HCT patients. RESULTS: Kidney involvement developed in 66 patients (4%). By 6-12 months after HCT, approximately 33% of these patients developed CKD (23 patients: 19 allograft and 4 autograft). In most CKD patients, the cause was idiopathic. In 23 patients who developed CKD, 5 patients had acute kidney injury during the transplantation period with GVHD. Other renal involvements were as follows: hypertension (17%), proteinuria (15%), hydronephrosis (2%), hematuria (18%), and diabetes (3%). CONCLUSION: The frequency of CKD in this study seems to be high. It is important to know the specific type of kidney damage, to determine when to be aware of the time of occurrence of renal complications and to understand the best methods to treat patients with renal injury secondary to nephrotic syndrome and idiopathic CKD.


Subject(s)
Hematopoietic Stem Cell Transplantation/adverse effects , Kidney Diseases/epidemiology , Kidney Failure, Chronic/epidemiology , Adolescent , Adult , Aged , Bone Marrow Transplantation/adverse effects , Child , Child, Preschool , Humans , Middle Aged , Odds Ratio , Prospective Studies , Retrospective Studies , Risk Factors , Transplantation, Autologous , Transplantation, Homologous , Treatment Outcome
14.
Ann Oncol ; 17(1): 131-4, 2006 Jan.
Article in English | MEDLINE | ID: mdl-16227315

ABSTRACT

INTRODUCTION: Arsenic trioxide is effective and approved for treatment of relapsed or refractory acute promyelocytic leukemia (APL) cases resistant to all-trans retinoic acid (ATRA), but its effect on new cases of APL is not clear. MATERIALS AND METHODS: We studied 111 patients with APL. Arsenic trioxide was infused at 0.15 mg/kg daily dose, until complete remission was achieved. Then, after 28 days of rest, arsenic trioxide was infused daily for 28 days as consolidation therapy. We studied minimal residual disease (MRD) by semi-sensitive reverse transcription polymerase chain reaction (RT-PCR) on peripheral blood samples. RESULTS: Complete remission was observed in 95 patients (85.6%). With the median (range) follow-up period of 16.5 (1-57) months, 1- and 2-year disease-free survival was 88.3% and 63.7%, respectively; 24 patients relapsed, 19 of whom achieved a second complete remission, again by arsenic trioxide. Third and fourth remissions were seen in some relapsed patients, again by arsenic trioxide. For patients in complete remission, 1- and 3-year survival was 95.5% and 87.6%, respectively. MRD was positive in four (8.3%) out of 48 cases during 1 year after remission induction; three of them relapsed clinically. CONCLUSIONS: Arsenic trioxide is effective as first-line treatment for APL. Results of arsenic trioxide combination therapy with chemotherapy/ATRA requires further study.


Subject(s)
Antineoplastic Agents/therapeutic use , Arsenicals/therapeutic use , Leukemia, Promyelocytic, Acute/drug therapy , Oxides/therapeutic use , Adolescent , Adult , Aged , Arsenic Trioxide , Child , Disease-Free Survival , Female , Humans , Leukocytosis , Male , Middle Aged , Neoplasm Proteins/genetics , Neoplasm Proteins/metabolism , Neoplasm Recurrence, Local/drug therapy , Neoplasm, Residual/drug therapy , Oncogene Proteins, Fusion/genetics , Oncogene Proteins, Fusion/metabolism , Prognosis , Remission Induction , Reverse Transcriptase Polymerase Chain Reaction , Survival Rate , Treatment Outcome
15.
J Lipid Res ; 22(7): 1102-10, 1981 Sep.
Article in English | MEDLINE | ID: mdl-7299290

ABSTRACT

High density lipoproteins (HDL) were isolated by a chromatographic procedure and subsequently fractionated on a DEAE cellulose (DE-52) column. Four fractions were separated and analyzed for lipid and protein composition and molecular weight. During ion exchange chromatography, one of the four fractions consistently coincided with lecithin:cholesterol acyltransferase (LCAT) activity. When the HDL fractions were incubated with highly purified LCAT preparations, the LCAT activity showed a dependence on unesterified cholesterol concentrations. The HDL subfraction eluting at the highest ionic strength was found to be the best substrate for LCAT. This subfraction exhibited apoprotein and lipid composition similar to HDL3 and contained 31% of the total apoprotein D present in all the subfractions. A positive correlation was found between LCAT activity and the cholesteryl ester/unesterified cholesterol ratio, and a negative correlation was found between LCAT substrate potential and apparent molecular weight of the HDL subfractions when these subfractions were incubated with LCAT. No correlation was apparent between LCAT activity, and the phospholipid/unesterified cholesterol ratio or with the apoA-I/apoA-II ratio.U


Subject(s)
Lipoproteins, HDL/blood , Phosphatidylcholine-Sterol O-Acyltransferase/metabolism , Cholesterol/analysis , Chromatography, Thin Layer , Humans , Kinetics , Lipoproteins, HDL/isolation & purification , Molecular Weight , Phospholipids/analysis , Substrate Specificity , Triglycerides/analysis
16.
Prep Biochem ; 10(4): 431-44, 1980.
Article in English | MEDLINE | ID: mdl-6997859

ABSTRACT

High density lipoproteins (HDL) were isolated by a procedure employing polyanion precipitation and column chromatography. The product polyanion precipitation and column chromatography. The product was free of low denisty lipoproteins (LDL) but serum albumin (HSA) was still present. The remaining HSA was removed by an immunoadsorbent column. The HDL isolated by our method was compared to another HDL preparation isolated from the same plasma sample by the combination of ultracentrifugation and gel chromatgraphy. It was found to have approximately the same lipid and protein composition as the HDL isolated by conventional techniques. Minor differences included a higher phospholipid and apoprotein E content and lower triglyceride and ApoC II content of the HDL isolated by column chromatography. The method described here is considerably less tedious than earlier techniques, can be scaled up without substantial increase in labor and results in an approximately 30% higher yield than the method described by Rudel et al.


Subject(s)
Chromatography, Agarose/methods , Chromatography, Gel/methods , Lipoproteins, HDL/blood , Adult , Apoproteins/blood , Cholesterol/blood , Humans , Immunosorbent Techniques , Lipoproteins, HDL/isolation & purification , Male , Phospholipids/blood , Triglycerides/blood , Ultracentrifugation
17.
Comp Biochem Physiol B ; 82(3): 529-33, 1985.
Article in English | MEDLINE | ID: mdl-4085214

ABSTRACT

High density lipoprotein (HDL) was isolated from hog plasma by a simple immunoaffinity column chromatography procedure using immobilized anti-apolipoprotein AI. The composition of HDL isolated by immunoaffinity chromatography was nearly identical to that of a control sample that was isolated by an alternate method utilizing ultracentrifugation and gel chromatography. The HDL isolated by immunoaffinity chromatography had a larger number of polypeptide components that the control as indicated by acrylamide gel electrophoresis in the presence of urea. When the HDL isolated by immunoaffinity chromatography was applied to a heparin-agarose column the amount of protein retained was approximately twice that of the control. These findings indicate that the ultracentrifugation procedure probably induced the loss of apolipoprotein E containing components from the HDL complex.


Subject(s)
Lipoproteins, HDL/blood , Animals , Antigen-Antibody Complex , Cholesterol/analysis , Chromatography, Affinity/methods , Electrophoresis, Polyacrylamide Gel , Lipoproteins, HDL/isolation & purification , Phospholipids/analysis , Swine , Triglycerides/analysis
18.
Can J Biochem Cell Biol ; 61(8): 875-81, 1983 Aug.
Article in English | MEDLINE | ID: mdl-6627099

ABSTRACT

The polypeptide molecular weight of lecithin-cholesterol acyltransferase (LCAT) (45000) was obtained by deducting the weight of carbohydrate moiety (25%, w/w) from the total molecular weight of 60000. LCAT was found to have a relatively high content of glutamic acid, aspartic acid, glycine, and leucine residues and four half-cystines. The carbohydrate content was found to be about 25% (w/w): hexoses, 13%; hexosamines, 6.2%; and sialic acid, 5.4%. The total number of 408 amino acid residues per mole and the mean residue weight of 110.3 were found. From fluorescence spectroscopy analysis, 6-7 mol of tryptophan were found per mole of LCAT in 10 mM phosphate (pH 7.4). However, when LCAT was digested by the mixture of chymotrypsin and pronase the tryptophan residues increased to 10-11 mol/mol of LCAT, which agrees well with data obtained previously by ultraviolet absorption spectroscopy. A partial specific volume of 0.707 mL/g was determined by compositional analysis. Human LCAT was found to have a relatively high extinction coefficient (E1%1cm) of 21 at 280 nm and neutral pH. Two residues of cysteine per mole of LCAT were estimated both in the presence or absence of sodium dodecyl sulfate by titration with 5,5'-dithiobis-2-nitrobenzoic acid. The enzyme showed a lower tendency to staining with Coomassie blue R-250 than bovine serum albumin. The enzyme was rapidly inactivated by diisopropyl fluorophosphate (DFP), regardless of whether the free sulfhydryl were blocked or not. The enzyme was also irreversibly inhibited by cysteine above concentrations of 1 mM.(ABSTRACT TRUNCATED AT 250 WORDS)


Subject(s)
Phosphatidylcholine-Sterol O-Acyltransferase/blood , Amino Acids/analysis , Chemical Phenomena , Chemistry , Humans , Isoflurophate/pharmacology , Molecular Weight , Phosphatidylcholine-Sterol O-Acyltransferase/antagonists & inhibitors , Tryptophan/analysis
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