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Gondim DR, Cecilia JA, Rodrigues TNB, Vilarrasa-García E, Rodríguez-Castellón E, Azevedo DCS, Silva IJ. Protein Adsorption onto Modified Porous Silica by Single and Binary Human Serum Protein Solutions. Int J Mol Sci 2021; 22:9164. [PMID: 34502072 PMCID: PMC8430731 DOI: 10.3390/ijms22179164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/16/2021] [Accepted: 08/21/2021] [Indexed: 12/17/2022] Open
Abstract
Typical porous silica (SBA-15) has been modified with pore expander agent (1,3,5-trimethylbenzene) and fluoride-species to diminish the length of the channels to obtain materials with different textural properties, varying the Si/Zr molar ratio between 20 and 5. These porous materials were characterized by X-ray Diffraction (XRD), N2 adsorption/desorption isotherms at -196 °C and X-ray Photoelectron Spectroscopy (XPS), obtaining adsorbent with a surface area between 420-337 m2 g-1 and an average pore diameter with a maximum between 20-25 nm. These materials were studied in the adsorption of human blood serum proteins (human serum albumin-HSA and immunoglobulin G-IgG). Generally, the incorporation of small proportions was favorable for proteins adsorption. The adsorption data revealed that the maximum adsorption capacity was reached close to the pI. The batch purification experiments in binary human serum solutions showed that Si sample has considerable adsorption for IgG while HSA adsorption is relatively low, so it is possible its separation.
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PENNELL B, SARAVIS CA, BERGEN JR, HOAGLAND H. Isolation in Active Form of a Human Plasma Protein which Affects the Behavior of Trained Rats. INTERNATIONAL SOCIETY OF BLOOD TRANSFUSION 2015; 13:405-9. [PMID: 14485110 DOI: 10.1159/000426459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Iqbal MS, Taqi SG, Arif M, Wasim M, Sher M. In vitro distribution of gold in serum proteins after incubation of sodium aurothiomalate and auranofin with human blood and its pharmacological significance. Biol Trace Elem Res 2009; 130:204-9. [PMID: 19194667 DOI: 10.1007/s12011-009-8330-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Accepted: 01/23/2009] [Indexed: 10/21/2022]
Abstract
This study presents a comparative drug-protein, in vitro, binding profile of sodium aurothiomalate and auranofin. It was found that about 40% of total protein-bound gold is attached to albumin after incubation of aurothiomalate with whole blood for 24 h and about 29% of it was with alpha(1)-globulin and the least amount was found with gamma-globulin (6.1%). On the other hand, approximately 84% of the protein-bound auranofin gold attached to globulins of which 51% was found with beta-globulin band. It was almost equally distributed among albumin, alpha(2)-globulin and gamma-globulin, and showed least affinity for alpha(1)-globulin. The gold analyses were performed by standardless instrumental neutron activation method duly validated by use of an established atomic absorption method. The results of this study explain to some extent the difference in, in vivo, pharmacokinetics and pharmacodynamics of the two drugs.
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HOLGER-MADSEN T. Reduction of heparin activity by plasma globulins in patients with increased heparin resistance. Acta Haematol 2009; 27:157-70. [PMID: 13908341 DOI: 10.1159/000206777] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Berth M, Stalpaert M, Bosmans E. [The Hypo Ionic Protein Profile (HIPP). Laboratory analytical evaluation in Complementary and Alternative Medicine]. Acta Clin Belg 2008; 63:242-6. [PMID: 19048701 DOI: 10.1179/acb.2008.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The hypo ionic protein profile (HIPP) is a test based on the reticulo-endothelial index of Sandor. We evaluated the analytical performance of this test by comparing the obtained data in the HIPP to the concentration of some frequently measured specific serum proteins. The alfa euglobulin zone mainly comprises of ceruloplasmin, complement factor 3, apolipoprotein B and haptoglobin. The beta and gamma euglobulin zone reflect the concentration of the immunoglobulins. Since these proteins cannot be distinguished from each other, the diagnostic value of the HIPP will be limited. The HIPP is an outdated and aspecific assay for protein measurements.
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HIRSCHMAN SZ, MORELL AG, SCHEINBERG IH. THE HETEROGENEITY OF THE COPPER-CONTAINING PROTEIN OF HUMAN PLASMA, CERULOPLASMIN. Ann N Y Acad Sci 2006; 94:960-9. [PMID: 14036240 DOI: 10.1111/j.1749-6632.1961.tb35588.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Flight SM, Masci PP, Lavin MF, Gaffney PJ. Resistance of porcine blood clots to lysis relates to poor activation of porcine plasminogen by tissue plasminogen activator. Blood Coagul Fibrinolysis 2006; 17:417-20. [PMID: 16788320 DOI: 10.1097/01.mbc.0000233374.79593.57] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In-vitro experimentation was performed on porcine and human blood to determine their comparative responsiveness to a novel fibrinolytic inhibitor and thereby assess whether the pig is a suitable animal model for subsequent in-vivo testing of this inhibitor. Thromboelastography showed the clots formed from porcine whole blood to be highly resistant to tissue plasminogen activator (t-PA)-catalyzed lysis, and this communication offers the resistance of porcine plasminogen to activation by t-PA as an explanation. Porcine blood containing 100 and 1500 IU/ml added t-PA lysed very slowly, having LY30 values of 1.9 +/- 1.4 and 2.9 +/- 1.9%, respectively. In contrast, the LY30 values for the human clots containing 100 and 1500 IU/ml t-PA were 77.1 +/- 6.3 and 93.3 +/- 1.3%, respectively. Moreover, purified porcine plasminogen was activated very slowly by added t-PA in the presence of both human and porcine fibrin. Activation of plasminogen by the endogenous activators, as measured by the euglobulin clot lysis time, was greatly prolonged for the pig (22 +/- 3 h) compared with the human (3.5 +/- 1.5 h). These results suggest caution in using the pig as an experimental model when studying the effects of various agents on fibrinolysis.
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Dec M, Wernicki A. Conglutinin, CL-43 and CL-46--three bovine collectins. Pol J Vet Sci 2006; 9:265-75. [PMID: 17203746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Conglutinin, collectin-43 (CL-43) and collectin-46 (CL-46) are serum proteins characteristic for Bovidae. They belong to collectins--family of oligomeric proteins composed of trimeric subunits containing collagen-like sequences joined to C-type lectin domains. The genes encoding conglutinin, CL-43 and CL-46 are located on the bovine chromosome 28, and phylogenetic analysis indicates their common origin--from the lung surfactant protein D gene. Northern blot or immunocytochemical analysis confirm biosynthesis of bovine collectins mainly in the liver (conglutinin, CL-43) and in the thymus (CL-46). The level of conglutinin in the serum of dairy cows depends on many factors such as breeding, the season of the year, the stage of the reproductive cycle and infection. The collectins are involved in the innate immune defense. They bind to microbial surface carbohydrates inducing aggregation and, thereby, impeding infectivity. On the other hand the destruction of pathogens occurs due to stimulation of effector cells. CL-43 as well as conglutinin, binds to the collectin receptor (C1qR) localized on many types of cells identified as a surface variant of calreticulin. Conglutinin and CL-43 show antiviral activities towards influenza A virus and rotaviruses. Conglutinin also displays protective activity against bacterial infections.
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Guarneri F, Guarneri C, Benvenga S. Identification of Potentially Cross-Reactive Peanut-Lupine Proteins by Computer-Assisted Search for Amino Acid Sequence Homology. Int Arch Allergy Immunol 2005; 138:273-7. [PMID: 16220003 DOI: 10.1159/000088864] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2005] [Accepted: 05/18/2005] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Allergic cross-reactions are an issue of major concern because of implications for public health. The molecular basis of cross-allergy is the similarity of epitopes belonging to proteins of different organisms. Lupine is an emerging cause of food allergy, which has become a 'hot topic' because of recent large-scale introduction into processed foods and frequent cross-reactions with other members of the legume family. However, no lupine allergen has been characterized thus far. Prompted by a recently reported case of peanut-lupine cross-allergy, we wished to identify the possible cross-reactive allergen(s) between the two vegetal species. METHODS We used computer-aided amino acid sequence comparison, a well-established technique for the study of protein homology, and followed the FAO/WHO guidelines for the identification of potential allergens. We also performed a three-dimensional modeling of the suspected cross-reactive proteins to compare their molecular surfaces. RESULTS We found a highly significant sequence homology and molecular similarity between allergen Ara h 8 of peanut and pathogenesis-related protein PR-10 of white lupine. Another protein of lupine, the beta-conglutin precursor, was found to be significantly homologous to the Ara h 1 allergen of peanut. The molecular surfaces of Ara h 8 and PR-10 were remarkably similar. CONCLUSIONS Our in silico data allow to predict the allergenicity of PR-10 and beta-conglutin precursor of white lupine according to FAO/WHO guidelines. Amino acid sequence homology also suggests that these proteins could be responsible, at least in part, for some of the allergic cross-reactions between peanut and lupine reported in the literature.
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Gray R, Canfield P, Rogers T. Serum proteins in the leopard seal, Hydrurga leptonyx, in Prydz Bay, Eastern Antarctica and the coast of NSW, Australia. Comp Biochem Physiol B Biochem Mol Biol 2005; 142:67-78. [PMID: 15993637 DOI: 10.1016/j.cbpc.2005.05.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2005] [Revised: 05/30/2005] [Accepted: 05/31/2005] [Indexed: 11/28/2022]
Abstract
Blood protein analysis including total serum protein and albumin by chemical methods, fibrinogen estimation and serum protein electrophoresis (SPE) was performed on the leopard seal, Hydrurga leptonyx. The most commonly observed SPE pattern was eight fractions designated albumin, alpha(1a), alpha(1b), alpha(2a), alpha(2b), beta(1), beta(2) and gamma-globulin. Significantly higher total serum protein and albumin concentrations, as determined by chemical methods, and significantly higher alpha(2)-globulin concentrations, determined by SPE, were seen in free-ranging male seals compared to females, whilst significantly higher beta-globulin concentrations were seen in female seals. Season of sampling influenced fibrinogen and beta(2)-globulin concentrations, whereas there were no significant differences in any protein concentrations with moult status. Qualitative comparison of SPE traces of leopard seals in Antarctica with "sick" individuals in NSW, Australia revealed obvious differences, as did quantitative comparison of protein concentrations where differences in alpha(1), alpha(2), beta(1), beta(2), and gamma-globulin concentrations were seen. These findings suggest that SPE is a useful tool for investigating serum proteins in the leopard seal, with applications for the investigation of "sick" individuals and the assessment of variation in homeostasis. This technique could also be used to identify the presence of environmental stressors, subclinical disease and physiological variation within specific seal populations.
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Fujiyama S, Sasaki Y. [Immune serum globulin (ISG) and its usefulness for prevention of hepatitis A]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 2004; 62 Suppl 8:496-8. [PMID: 15453372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
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Buczko W, Kubik A, Kucharewicz I, Chabielska E. Antithrombotic effect of captopril and enalapril in young rats. POLISH JOURNAL OF PHARMACOLOGY 2004; 56:97-104. [PMID: 15047983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/15/2003] [Revised: 12/16/2003] [Indexed: 04/29/2023]
Abstract
Angiotensin converting enzyme inhibitors (ACE-Is) are the main drugs used in the treatment of essential hypertension and congestive heart failure in adults. Recently, we have demonstrated the antithrombotic effect of captopril (CAP) and enalapril (ENA) in venous thrombosis model in adult rats. One might also suggest the beneficial effect of those drugs on hemostasis in young individuals. Two months old male Wistar rats were used in the study. Acute administration of CAP at a dose of 50 and 100 mg kg(-1) significantly reduced the venous thrombus weight. Dose-dependent reduction in the thrombus weight was also observed in ENA (3, 10, 30 mg kg(-1))-treated rats. Strong reduction in the thrombus weight was also seen after chronic administration of CAP (2 x 25 mg kg(-1)) and ENA (1 x 15 mg kg(-1)). Both drugs given chronically reduced the frequency of thrombi. Systolic blood pressure was reduced to similar extent after acute and chronic application of the drugs. CAP shortened euglobulin clot lysis time (ECLT) when given acutely (100 mg kg(-1)) and chronically (2 x 25 mg kg(-1)). ENA decreased ECLT only when given at multiple doses (1 x 15 mg kg(-1)). None of the drugs changed prothrombin time or activated partial tromboplastin time. We conclude that CAP and ENA possess antithrombotic effect in young individuals. Activation of the fibrinolytic pathway seems to play an important role in the mechanism of their antithrombotic action.
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Hirano Y, Kuroda K, Tamura M, Hayashi K. The cell extract of Porphyromonas gingivalis promotes attachment of Prevotella nigrescens cells to hydroxyapatite. J Oral Sci 2003; 45:99-106. [PMID: 12930133 DOI: 10.2334/josnusd.45.99] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Large quantities of Prevotella nigrescens ATCC 25261 (P. nigrescens) cells adhere to hydroxyapatite (HA) treated with extract from Porphyromonas gingivalis 381 (Pg-Ext), but not to HA coated with human serum albumin (HSA) or human serum globulin (HSG). The duration of HA treatment with Pg-Ext and several other conditions were tested to determine the factors causing Pg-Ext to promote P. nigrescens cell adhesion. Pg-Ext adsorbed rapidly to HA in less than 5 min. The maximum adherence of P. nigrescens cells to HA was observed after treatment of HSA and HSG and then retreatment of HA with Pg-Ext. It was found that Pg-Ext heated at 80 degrees C for 30 min did not lose its propensity to promote attachment of P. nigrescens to HA and that it also remained stable at 4 degrees C for at least 6 days. The trypsin-like enzyme activity of Pg-Ext was also measured, with BAPNA as the substrate and commercially purchased trypsin as the standard, and was approximately 0.12 units/mg. These data suggest that the presence of Pg-Ext is one of the essential factors responsible for P. nigrescens cell attachment to apatitic surfaces, and that with its trypsin-like activity, Pg-Ext may be considered an extremely important substance for the establishment of P. nigrescens in the periodontal pocket and the development of periodontal disease.
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Hofbauerová K, Kopecký V, Sýkora J, Karpenko V. Thermal stability of the human blood serum acid alpha(1)-glycoprotein in acidic media. Biophys Chem 2003; 103:25-33. [PMID: 12504252 DOI: 10.1016/s0301-4622(02)00231-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Thermal stability of human alpha(1)-acid glycoprotein and its desialyzed form were studied in the pH range of 1.5-5.2, i.e. about its pI. Circular dichroism, fluorescence and UV-absorption were used to determine the conformational changes and their reversibility in the temperature range 25-80 degrees C. These changes were tested in a three step process-heating, cooling and a second heating. Principal component analysis was applied for analyzing the spectral sets obtained in these experiments. Fully reversible behavior of Trp residues, as characterized by fluorescence spectroscopy, was observed during the heating process at all pH values. Nevertheless, three different types of the protein motion (reversible, irreversible and rearrangement of the protein core) were determined by UV-absorption spectroscopy. Thus, an environment of Tyr and Phe is modified or reversibly rearranged during the heating process in acid media. These types of alpha(1)-acid glycoprotein behavior were not significantly affected by desialyzation.
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Hansen S, Holmskov U. Lung surfactant protein D (SP-D) and the molecular diverted descendants: conglutinin, CL-43 and CL-46. Immunobiology 2002; 205:498-517. [PMID: 12396011 DOI: 10.1078/0171-2985-00150] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Lung surfactant protein D (SP-D), conglutinin, CL-43 and CL-46 belong to a group of proteins designated collectins that, besides a common structure made of a collagen-like region and a C-type lectin domain, are important components of the innate immune defence. They all bind complex glycoconjugates on microorganisms thereby inhibiting infection, enhancing the clearance by phagocytes and modulating the immune response. In addition, SP-D inhibits the generation of radical oxygen species or the propagation of lipid peroxidation. Knock-out mice deficient in SP-D have a disturbed homeostasis of pulmonary surfactant and suffer from oxidative stress leading to pulmonary inflammation upon microbial challenge. Conglutinin, CL-43 and CL-46 have in contrast to the rest of the collectin family only been found in cattle. During the characterization of the genes encoding conglutinin, CL-43 and CL-46 we observed several features showing that the additional bovine collectins are diverted molecular descendants of an ancestral SP-D gene. Since structural similarity often associates with common functionality, some of SP-D's effector mechanisms may apply to conglutinin, CL-43 and CL-46--and vice versa. This review focus on the structural and functional relationship of this group of collectins.
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Ranuncolo SM, Matos E, Loria D, Vilensky M, Rojo R, Bal de Kier Joffé E, Inés Puricelli L. Circulating 92-kilodalton matrix metalloproteinase (MMP-9) activity is enhanced in the euglobulin plasma fraction of head and neck squamous cell carcinoma. Cancer 2002; 94:1483-91. [PMID: 11920505 DOI: 10.1002/cncr.10356] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Cancer lethality is usually the result of local invasion and metastasis of neoplastic cells from the primary tumor. Because of their ability to degrade extracellular matrix components (EMC), matrix metalloproteinases (MMPs) have been implicated in the breakdown of basement membranes and underlying stroma, thereby facilitating tumor growth and invasion. METHODS The authors quantitated, by gelatin zymography and densitometric analysis, MMP activity in the euglobulin plasma fraction of 50 healthy controls and 91 head and neck squamous cell carcinoma (HNSCC) patients (51 from the larynx and 40 from the oropharynx). RESULTS The median value for 92-kilodalton (kD) MMP (MMP-9) activity was increased significantly in laryngeal (Md 2.1 arbitrary units (AU)/mL plasma; range, 0.2-6.4) and oropharyngeal patients (Md 2.08 AU/mL; range, 0.0-5.0) with respect to the controls (Md 0.48 AU/mL; range, 0.0-1.8). Both groups of cancer patients showed a similar behavior. Multivariate analysis indicated that circulating 92-kD MMP activity was not predicted by the clinical-pathologic parameters such as tumor stage, histologic grade, and metastatic lymph nodes. There was no association between high levels of MMP-9 activity and either cigarette smoking or alcohol consumption, major risk factors for developing HNSCC. CONCLUSIONS The authors found a significant increase of MMP-9 plasma activity both in laryngeal and oropharyngeal squamous cell carcinoma patients as compared with healthy controls. Further studies are necessary to establish its usefulness in the clinical management of these patients.
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Prokopenko PG, Borisenko SA, Sokolov AV, Terentyev AA. Identification and characterization of serum protein in patients with ovarian cancer. Bull Exp Biol Med 2002; 133:156-9. [PMID: 12428284 DOI: 10.1023/a:1015598805945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A 36 kDa protein was isolated from the sera of patients with ovarian cancer and rabbit antisera to this protein were prepared. Precipitation test with these antisera detected an antigen with electrophoretic mobility corresponding to alpha-1-globulins and molecular weight of 36 kDa. Direct comparison of precipitating test systems showed that this antigen is not identical to the known carcinoembryonic, placental, and reactive proteins. Serum alpha-1-globulin was not detected in the sera of healthy humans, pregnant women, newborns, and in human adult and fetal visceral tissues at the level of precipitating test system sensitivity 1 mg/liter. It was detected in the sera of patients with ovarian cancer, in ovarian tumor (cancer) tissues, in the contents of ovarian tumor cavities, and in concentrated specimens of amniotic fluid. The antigen was not detected in ascitic fluid of patients with ovarian cancer, but it was present in 75% serum samples from these patients. The antigen was called serum oncoovarian alpha-1-globulin. SDS-PAAG electrophoresis showed that this antigen is an oligomer consisting of subunits (monomers) with molecular weight of 36 kDa. Under denaturing conditions in the presence of 2-mercaptoethanol these monomers dissociate into polypeptide chains with a molecular weight of 18 kDa. The protein is liable to oligomerization. Comparative characteristics of serum oncoovarian alpha-1-globulin and CA-125 antigen are presented.
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Gorinstein S, Caspi A, Rosen A, Goshev I, Zemser M, Weisz M, Añon MC, Libman I, Lerner HT, Trakhtenberg S. Structure characterization of human serum proteins in solution and dry state. THE JOURNAL OF PEPTIDE RESEARCH : OFFICIAL JOURNAL OF THE AMERICAN PEPTIDE SOCIETY 2002; 59:71-8. [PMID: 11906609 DOI: 10.1046/j.1397-002x.2001.jpp10948.doc.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The present report describes application of advanced analytical methods to establish correlation between changes in human serum proteins of patients with coronary atherosclerosis (protein metabolism) before and after moderate beer consumption. Intrinsic fluorescence, circular dichroism (CD), differential scanning calorimetry and hydrophobicity (So) were used to study human serum proteins. Globulin and albumin from human serum (HSG and HSA, respectively) were denatured with 8 m urea as the maximal concentration. The results obtained provided evidence of differences in their secondary and tertiary structures. The thermal denaturation of HSA and HSG expressed in temperature of denaturation (Td, degrees C), enthalpy (DeltaH, kcal/mol) and entropy (DeltaS kcal/mol K) showed qualitative changes in these protein fractions, which were characterized and compared with fluorescence and CD. Number of hydrogen bonds (n) ruptured during this process was calculated from these thermodynamic parameters and then used for determination of the degree of denaturation (%D). Unfolding of HSA and HSG fractions is a result of promoted interactions between exposed functional groups, which involve conformational changes of alpha-helix, beta-sheet and aperiodic structure. Here evidence is provided that the loosening of the human serum protein structure takes place primarily in various concentrations of urea before and after beer consumption (BC). Differences in the fluorescence behavior of the proteins are attributed to disruption of the structure of proteins by denaturants as well as by the change in their compactability as a result of ethanol consumption. In summary, thermal denaturation parameters, fluorescence, So and the content of secondary structure have shown that HSG is more stable fraction than HSA.
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Gorinstein S, Caspi A, Goshev I, Moncheva S, Zemser M, Weisz M, Libman I, Lerner HT, Trakhtenberg S, Martín-Belloso O. Beer consumption and changes in stability of human serum proteins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:1441-1445. [PMID: 11312877 DOI: 10.1021/jf001262n] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of this study was to evaluate the influence of beer consumption (BC) on the functional and structural properties of human serum proteins (HSP). Thirty-eight volunteers (after coronary bypass) were divided into two groups: experimental (EG) and control (CG). Nineteen volunteers of the EG consumed 330 mL per day of beer (about 20 g of alcohol) for 30 consecutive days. The CG volunteers consumed mineral water instead of beer. Blood samples were collected from EG and CG patients before and after the experiment. Albumin (Alb), globulin (Glo), and methanol-precipitable proteins (MPP) from human serum were denatured with 8 M urea. Fluorescence and electrophoresis were employed in order to elucidate urea-induced conformational changes and structural behavior of proteins. The measured fluorescence emission spectra were used to estimate the stability of native and denatured protein fractions before and after BC. It was found that before BC the fractions most stable to urea denaturation were Glo, Alb, and MPP fractions. After BC in most of the beer-consuming patients (EG) some changes in native and denatured protein fractions were detected: a tendency to lower stability and minor structural deviations. These qualitative changes were more profound in MPP than in Alb and Glo. Thus, Glo is more resistible to alcohol influence than Alb, which in turn is more resistible than MPP. No serum protein changes were detected in patients of CG.
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Saakov VS. Connection between the changes of derivatives of albumin spectra and the accuracy of determination of the albumin-globulin coefficient in the case of radiation damage. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2000; 371:126-30. [PMID: 10833639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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RICHTERICH R, TEMPERLI A, AEBI H. The heterogeneity of ceruloplasmin: isolation and characterization of 2 cuproproteins from human serum. ACTA ACUST UNITED AC 1998; 56:240-51. [PMID: 14492064 DOI: 10.1016/0006-3002(62)90561-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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EDELMAN GM, GALLY JA. The nature of Bence-Jones proteins. Chemical similarities to polypetide chains of myeloma globulins and normal gamma-globulins. ACTA ACUST UNITED AC 1998; 116:207-27. [PMID: 13889153 PMCID: PMC2137388 DOI: 10.1084/jem.116.2.207] [Citation(s) in RCA: 281] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chemical relations among Bence-Jones proteins, myeloma proteins, and normal γ-globulins have been investigated by a variety of means. Starch gel electrophoresis in 8 M urea of reduced alkylated Bence-Jones proteins yielded patterns of bands corresponding to those of the light (L) polypeptide chains of the dissociated myeloma protein from the same patient. One instance in which this correspondence was found was chosen for extensive study. Chromatography on carboxymethylcellulose in 6 M urea was employed to isolate the light (L) polypeptide chains and heavy (H) polypeptide chains of the completely reduced and alkylated myeloma protein. Isolation of similarly treated Bence-Jones protein from the same patient corroborated the correspondence to the L chains of the myeloma protein. Amino acid analyses indicated that the compositions of the Bence-Jones protein and the L chains of the myeloma protein were identical. Moreover, the thermosolubility properties and spectrofluorometric behavior of the isolated L chains and Bence-Jones protein were similar. Ultracentrifugal analyses of the L chains of normal human 7S γ-globulin showed that their molecular weight in 6 M urea was 20,000. In aqueous solution their molecular weight was 41,000, suggesting that they exist as dimers under these conditions. The L chains of normal human γ-globulin were found to have reversible thermosolubility properties similar to those of Bence-Jones proteins. The H chains of normal human γ-globulin did not share these properties. Using spectrofluorometric methods, characteristic molecular transitions were found upon heating Bence-Jones proteins and L chains. These transitions were indicated by an increase in the intensity of fluorescence at well defined temperatures as well as by reversible shifts in the wavelength of maximal emission. The findings suggest that Bence-Jones proteins are composed of L chains of the type found in normal and pathological γ-globu]ins.
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