Research Article

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G. Flores-Ramos; E. De Dios; A.M. Puebla-Pérez; L.E. Figuera-Villanueva; A. Ramos-Silva; R. Ramírez-Patiño; J.I. Delgado-Saucedo; E. Salas-González; G.M. Zúñiga-González; A. Alonzo-Rojo; I. Gutiérrez-Hurtado; M.P. Gallegos-Arreola
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Breast cancer; Folate; MTHFR; Polymorphism; Vitamin

We investigated the association between dietary intake of folate, vitamin B6, and the 5,10-methylenetetrahydrofolate reductase (MTHFR) genotype with breast cancer. A matched case-control study was conducted, and 413 patients with newly diagnosed and histologically confirmed breast cancer and 436 controls were recruited. Folate intake, vitamin B6, and vitamin B12 levels were ... more

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A1298C polymorphism; C677T polymorphism; Ethnic groups; Mixteca; MTHFR; Nahua

In this study, we examined the distribution of genotype and allele frequencies of the C677T and A1298C polymorphisms in the methylenetetrahydrofolate-reductase gene (MTHFR) in two ethnic groups in the State of Guerrero, Mexico, which were compared with those of the Mestizo population of the region. A comparative study was conducted on 455 women from two ethnic groups and a group ... more

V. Antonio-Véjar; O. del Moral-Hernández; L.C. Alarcón-Romero; E. Flores-Alfaro; M.A. Leyva-Vázquez; D. Hernández-Sotelo; B. Illades-Aguiar
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Breast cancer; Folate; MTHFR; Polymorphism

We conducted a hospital-based case-control study to investigate the associations of dietary intake of folate and MTHFR C677T and A1298C polymorphisms with breast cancer in a Chinese population. A 1:1-matched case-control study was conducted. Two hundred and thirty patients who were newly diagnosed and histologically confirmed breast cancer and 230 controls were enrolled from Xinxiang ... more

Z.G. Wang; W. Cui; L.F. Yang; Y.Q. Zhu; W.H. Wei
05/17/2006
C677T polymorphism; Colorectal cancer; Hypermethylation; Methylenetetrahydrofolate reductase; Microsatellite instability; MTHFR

The methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism is associated with the expression of a thermolabile enzyme with decreased activity that influences the pool of methyl-donor molecules. Several studies have reported an association between C677T polymorphism and susceptibility to colorectal cancer (CRC). Considering that methylation abnormalities appear to be important for the ... more

A.D. Clarizia; L. Bastos-Rodrigues; H.B. Pena; C. Anacleto; B. Rossi; A. Lopes; J.Cláudio C. Rocha; O. Caballero; A. Camargo; A.J.G. Simpson; S.D.J. Pena; F.A. Soares
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C677T polymorphism; Folate; Homocysteine; MTHFR; Vitamin B12

Association between neural tube defects (NTDs) and C677T polymorphism of the methylenetetrahydrofolate reductase (MTHFR) gene was suspected, because the MTHFR gene codes for a key enzyme in folate metabolism. Its deficiency usually leads to significant reductions in plasma concentrations of folate, vitamin B12 and methionine, whereas homocysteine levels are increased. We ... more

M.O. Erdogan; S.H. Yildiz; M. Solak; O. Eser; E. Cosar; B. Eser; R. Koken; S. Buyukbas
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Breast cancer; Chemotherapy; P-glycoprotein; Polymorphism

Primary chemotherapy is a useful strategy for the treatment of locally advanced breast cancer and therefore allows in vivo evaluation of the action of cytotoxic drugs and the possibility of accomplishing conservative breast surgeries, as well as the early treatment of metastasis. Mechanisms of resistance to the drugs include the action of protein associated with the efflux of drugs from ... more

F.F.O. Rodrigues; R.E. Santos; M.B. Melo; M.A.L.G. Silva; A.L. Oliveira; R.L. Rozenowicz; L.B. Ulson; T. Aoki
12/08/2011
Breast cancer; Chondroitin sulfate; Chondroitinase ABC; Metastasis; Orthotopic tumor

Breast cancer is one of the leading causes of cancer-related deaths amongst women in the USA. The tumor microenvironment has been suggested to be an attractive therapeutic target for treatment of cancers. The glycosaminoglycan chondroitin sulfate, as part of the cellular microenvironment, consists of long linear chains of repeating disaccharide units, which are covalently attached to core ... more

R.D. Prinz; C.M. Willis; A. Viloria-Petit; M. Klüppel
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Breast cancer; CYP2C19; Genetics; Polymorphism

Cytochrome P450 (CYP) 2C19 metabolizes arachidonic acid to biologically active epoxyeicosatrienoic acids, which significantly promote proliferation of cancer cells in vitro and in vivo. We looked for a possible association between human CYP2C19*3 gene polymorphism and breast cancer in the Chinese Han population. In a Chinese Han case-control study of breast cancer ... more

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Breast cancer; D‑loop; mtDNA; Polymorphism

A high incidence of somatic mtDNA polymorphisms has been reported in a wide variety of human cancers; some of them have been proposed as markers for the early detection of breast cancer. However, little attention has been paid to the potential of germline mitochondrial sequence variations as genetic risk factors for cancer. We performed a case-control study of 70 unrelated Tunisian women ... more

Y. Loueslati; W. Troudi; L. Cherni; K.B. Rhomdhane; L. Mota-Vieira

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