SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Yoon,S.; Hirata,R.D.C.; Nguyen,N.Y.; Curi,R.; Russo,M.; Hirata,M.H..

Abnormal production of interferon alpha (IFN-a) has been found in certain autoimmune diseases and can be also observed after prolonged therapy with IFN-a. IFN-a can contribute to the pathogenesis of allograft rejection in bone marrow transplants. Therefore, the development of IFN-a inhibitors as a soluble receptor protein may be valuable for the therapeutic control of these diseases. We have expressed two polypeptides encoding amino acids 93-260 (P1) and 261-410 (P2) of the extracellular domain of subunit 1 of the interferon-a receptor (IFNAR 1-EC) in E. coli. The activities of the recombinant polypeptides and of their respective antibodies were evaluated using antiproliferative and antiviral assays. Expression of P1 and P2 polypeptides was achieved by...

HFE gene mutations and iron status of Brazilian blood donors

Palavras-chave: Interferon alpha; Interferon-a receptor; Inhibitor of interferon-a; Autoimmune diseases; Graft-versus-host disease; Recombinant protein.

Ano: 2000

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000700007

Santos,P.C.J.L.; Cançado,R.D.; Terada,C.T.; Rostelato,S.; Gonzales,I.; Hirata,R.D.C.; Hirata,M.H.; Chiattone,C.S.; Guerra-Shinohara,E.M..

Mutations of the HFE and TFR2 genes have been associated with iron overload. HFE and TFR2 mutations were assessed in blood donors, and the relationship with iron status was evaluated. Subjects (N = 542) were recruited at the Hemocentro da Santa Casa de São Paulo, São Paulo, Brazil. Iron status was not influenced by HFE mutations in women and was independent of blood donation frequency. In contrast, men carrying the HFE 282CY genotype had lower total iron-binding capacity (TIBC) than HFE 282CC genotype carriers. Men who donated blood for the first time and were carriers of the HFE 282CY genotype had higher transferrin saturation values and lower TIBC concentrations than those with the homozygous wild genotype for the HFE C282Y mutation. Moreover, in this...

High baseline serum total and LDL cholesterol levels are associated with MDR1 haplotypes in Brazilian hypercholesterolemic individuals of European descent

Palavras-chave: HFE; TFR2; Gene mutations; Blood donors; Iron status.

Ano: 2010

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000100015

Rodrigues,A.C.; Rebecchi,I.M.M.; Bertolami,M.C.; Faludi,A.A.; Hirata,M.H.; Hirata,R.D.C..

The MDR1 gene encodes the P-glycoprotein, an efflux transporter with broad substrate specificity. P-glycoprotein has raised great interest in pharmacogenetics because it transports a variety of structurally divergent drugs, including lipid-lowering drugs. The synonymous single-nucleotide polymorphism C3435T and the nonsynonymous single-nucleotide polymorphism G2677T/A in MDR1 have been indicated as potential determinants of variability in drug disposition and efficacy. In order to evaluate the effect of G2677T/A and C3435T MDR1 polymorphisms on serum levels of lipids before and after atorvastatin administration, 69 unrelated hypercholesterolemic individuals from São Paulo city, Brazil, were selected and treated with 10 mg atorvastatin orally once daily for...

Interferon-alpha receptor 1 mRNA expression in peripheral blood mononuclear cells is associated with response to interferon-alpha therapy of patients with chronic hepatitis C

Palavras-chave: MDR1 gene; Hypercholesterolemia; Statins; Single nucleotide polymorphism; Pharmacogenetics.

Ano: 2005

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000900014

Massirer,K.B.; Hirata,M.H.; Silva,A.E.B.; Ferraz,M.L.G.; Nguyen,N.Y.; Hirata,R.D.C..

Interferon (IFN)-alpha receptor mRNA expression in liver of patients with chronic hepatitis C has been shown to be a response to IFN-alpha therapy. The objective of the present study was to determine whether the expression of mRNA for subunit 1 of the IFN-alpha receptor (IFNAR1) in peripheral blood mononuclear cells (PBMC) is associated with the response to IFN-alpha in patients with chronic hepatitis C. Thirty patients with positive anti-HCV and HCV-RNA, and abnormal levels of alanine aminotransferase in serum were selected and treated with IFN-alpha2b for one year. Those with HBV or HIV infection, or using alcohol were not included. Thirteen discontinued the treatment and were not evaluated. The IFN-alpha response was monitored on the basis of alanine...

Lipoprotein lipase PvuII polymorphism is associated with variations in serum lipid levels in non-diabetic pregnant women

Palavras-chave: IFNAR1-mRNA expression; Interferon-alpha therapy; Chronic hepatitis C; Interferon-alpha receptor; Peripheral blood mononuclear cells; Reverse transcription- polymerase chain reaction.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000500003

Sepetiba,R.J.C.; Andrade,J.; Hirata,R.D.C.; Hirata,M.H.; Sepetiba,C.R.G.; Nakamura,Y.; Matsumoto,L.O.; Cavalli,S.A.; Bertolami,M.C..

The aim of the present study was to determine if there is an association between the single nucleotide polymorphisms (SNPs) of the lipoprotein lipase (LPL) and apolipoprotein E (apo E) genes and the serum lipid profile in pregnancy and puerperium. Non-diabetic women of European descent in the third semester of pregnancy (N = 120) were selected. Those with diseases or other condition that could modify their lipid profile were excluded from the study (N = 32). Serum lipids were measured by routine laboratory procedures and genomic DNA was extracted by a salting out method. LPL (PvuII and HindIII) and apo E (HhaI) SNPs were detected by the polymerase chain reaction and restriction fragment length polymorphism. Categorical and continuous variables were...

Multiplex-PCR for differentiation of Mycobacterium bovis from Mycobacterium tuberculosis complex

Palavras-chave: Lipoprotein lipase; LPL PvuII polymorphism; Apolipoprotein E; Single nucleotide polymorphism; Serum lipids; Non-diabetic pregnancy.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000700005

BJM

Spositto,F.L.E.; Campanerut,P.A.Z.; Ghiraldi,L.D.; Leite,C.Q.F.; Hirata,M.H.; Hirata,R.D.C.; Siqueira,V.L.D.; Cardoso,R. Fressatti.

We evaluated a multiplex-PCR to differentiate Mycobacterium bovis from M. tuberculosis Complex (MTC) by one step amplification based on simultaneous detection of pncA 169C > G change in M. bovis and the IS6110 present in MTC species. Our findings showed the proposed multiplex-PCR is a very useful tool for complementation in differentiating M. bovis from other cultured MTC species.

Polymorphisms of the low-density lipoprotein receptor gene in Brazilian individuals with heterozygous familial hypercholesterolemia

Palavras-chave: Bovine tuberculosis; Tuberculosis; PCR-multiplex; Diagnosis.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300012

Salazar,L.A.; Cavalli,S.A.; Hirata,M.H.; Diament,J.; Forti,N.; Giannini,S.D.; Nakandakare,E.R.; Bertolami,M.C.; Hirata,R.D.C..

Familial hypercholesterolemia (FH) is a metabolic disorder inherited as an autosomal dominant trait characterized by an increased plasma low-density lipoprotein (LDL) level. The disease is caused by several different mutations in the LDL receptor gene. Although early identification of individuals carrying the defective gene could be useful in reducing the risk of atherosclerosis and myocardial infarction, the techniques available for determining the number of the functional LDL receptor molecules are difficult to carry out and expensive. Polymorphisms associated with this gene may be used for unequivocal diagnosis of FH in several populations. The aim of our study was to evaluate the genotype distribution and relative allele frequencies of three...

Recombinant antigen-based immuno-slot blot method for serodiagnosis of syphilis

Palavras-chave: Familial hypercholesterolemia; DNA polymorphism; Atherosclerosis; Genetics; LDL receptor.

Ano: 2000

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000001100006

Sato,N.S.; Suzuki,T.; Ueda,T.; Watanabe,K.; Hirata,R.D.C.; Hirata,M.H..

Three recombinant antigens of Treponema pallidum Nichols strain were fused with GST, cloned and expressed in Escherichia coli, resulting in high levels of GST-rTp47 and GST-rTp17 expression, and supplementation with arginine tRNA for the AGR codon was needed to obtain GST-rTp15 overexpression. Purified fusion protein yields were 1.9, 1.7 and 5.3 mg/l of cell culture for GST-rTp47, GST-rTp17 and GST-rTp15, respectively. The identities of the antigens obtained were confirmed by automated DNA sequencing using ABI Prism 310 and peptide mapping by Finningan LC/MS. These recombinant antigens were evaluated by immuno-slot blot techniques applied to 137 serum samples from patients with a clinical and laboratory diagnosis of syphilis (61 samples), from healthy...

Use of the polymerase chain reaction to detect Mycobacterium leprae in urine

Palavras-chave: Treponema pallidum; Cloning; Recombinant antigen; Syphilis; GST.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000700002

Caleffi,K.R.; Hirata,R.D.C.; Hirata,M.H.; Caleffi,E.R.; Siqueira,V.L.D.; Cardoso,R.F..

Leprosy is an infectious disease caused by Mycobacterium leprae. The polymerase chain reaction (PCR) has been applied to detect M. leprae in different clinical samples and urine seems to be attractive for this purpose. PCR was used to improve the sensitivity for diagnosing leprosy by amplifying a 151-bp PCR fragment of the M. leprae pra gene (PCR-Pra) in urine samples. Seventy-three leprosy patients (39 males and 34 females, 14 to 78 years old) were selected for leprosy diagnosis at a reference laboratory in Maringá, PR, Brazil. Of these, 36 were under anti-leprosy multidrug therapy with dapsone and rifampicin for tuberculoid (TT) and dapsone, rifampicin and clofazimine for borderline (BB) and lepromatous (LL) forms. The control group contained 50 healthy...