@article {10506, title = {Polymorphisms in key bone modulator cytokines genes influence bisphosphonates therapy in postmenopausal women.}, journal = {Inflammopharmacology}, volume = {25}, year = {2017}, month = {2017 Apr}, pages = {191-201}, abstract = {

Osteoporosis is a multifactorial and debilitating disease resulting from decreased bone mineral density (BMD) and loss of tissue microarchitecture. Ineffective therapies may lead to bone fractures and subsequent death. Single nucleotide polymorphisms (SNPs) in key immune regulator genes have been associated with therapeutic response to bisphosphonates, which are the first therapeutic line of choice for osteoporosis. However, cytokine pathways and their relation with therapeutic adhesion remain to be fully elucidated. Aimed at better understanding these processes, we investigated the response to bisphosphonate therapy in postmenopausal women and four SNPs in key proinflammatory cytokines genes: IL23R +2284 (C>A) (rs10889677), IL17A +672 (G>A) (rs7747909), IL12B +1188 (T>G) (rs3212227) and INF-γ -1616 (G>A) (rs2069705). A total of 69 patients treated with bisphosphonate were followed for a period of 1 up to 4~years, genotyped and compared according to their changes in bone mineral density (BMD) and level of biochemical markers during their treatment. The INF-γ -1616 G/G associated with increased BMD values in femoral neck (GG/AA, p~=~0.016) and decreased BMD values in total hip (GG/GA, p~=~0.019; GG/AA, p~=~0.011). In relation to biochemical markers, INF-γ -1616 SNP associated with increased alkaline phosphatase (GG/AA; p~<~0.0001) and parathyroid hormone levels (AA/GA; p~=~0.017). Vitamin D values changes were related to IL17A +672 (GG/GA, p~=~0.034) and to IL12B +1188 (TT/TG, p~=~0.046) SNPs. Besides, significant differences in changes of calcium levels correlated with IL23R +2284 (CC/CA, p~=~0.016) genotypes. Altogether, we suggest that these polymorphisms may play an important role for therapeutic decisions in osteoporosis treatment.

}, keywords = {Aged, Bone Density, Bone Remodeling, Cytokines, Diphosphonates, Female, Humans, Middle Aged, Osteoporosis, Postmenopausal, Polymorphism, Single Nucleotide, Postmenopause}, issn = {1568-5608}, doi = {10.1007/s10787-017-0322-7}, author = {Lima, C A D and Javorski, N R and Souza, A P O and Barbosa, A D and Valen{\c c}a, A P M C and Crovella, S and Souza, P R E and de Azev{\^e}do Silva, J and Sandrin-Garcia, P} } @article {8029, title = {Interleukin-18, interleukin-12B and interferon-γ gene polymorphisms in Brazilian patients with rheumatoid arthritis: a pilot study.}, journal = {Tissue Antigens}, volume = {86}, year = {2015}, month = {2015 Oct}, pages = {276-8}, abstract = {

Polymorphisms in interleukin (IL)-18, IL-12 and interferon (IFN)-γ genes are associated with different levels of cytokines expression and have been associated with rheumatoid arthritis (RA). IL-18 +105 A/C, IL-12B +1188 A/C and IFN-γ +874 T/A polymorphisms were analyzed by restriction fragment length polymorphism-polymerase chain reaction (PCR) and amplification refractory mutation system PCR from 90 RA patients and 186 healthy individuals. There were significant differences to IL-18 +105 A/C polymorphism between the RA and control groups (odds ratio = 3.77; P < 0.0001). Individual carriers of the variant allele C had a 3.77-fold increased risk of for RA (P = 0.0032). No association was observed for IL-12B and IFN-γ polymorphisms. Our finds suggest a possible role for IL-18 polymorphism in the RA susceptibility in studied population.

}, issn = {1399-0039}, doi = {10.1111/tan.12645}, author = {Angelo, H D and Gomes Silva, I I F and Oliveira, R D R and Louzada-J{\'u}nior, P and Donadi, E A and Crovella, S and Maia, M M D and de Souza, P R E and Sandrin-Garcia, P} } @article {7773, title = {A rapid screening of ancestry for genetic association studies in an admixed population from Pernambuco, Brazil.}, journal = {Genet Mol Res}, volume = {14}, year = {2015}, month = {2015}, pages = {2876-84}, abstract = {

Genetic association studies determine how genes influence traits. However, non-detected population substructure may bias the analysis, resulting in spurious results. One method to detect substructure is to genotype ancestry informative markers (AIMs) besides the candidate variants, quantifying how much ancestral populations contribute to the samples{\textquoteright} genetic background. The present study aimed to use a minimum quantity of markers, while retaining full potential to estimate ancestries. We tested the feasibility of a subset of the 12 most informative markers from a previously established study to estimate influence from three ancestral populations: European, African and Amerindian. The results showed that in a sample with a diverse ethnicity (N = 822) derived from 1000 Genomes database, the 12 AIMs had the same capacity to estimate ancestries when compared to the original set of 128 AIMs, since estimates from the two panels were closely correlated. Thus, these 12 SNPs were used to estimate ancestry in a new sample (N = 192) from an admixed population in Recife, Northeast Brazil. The ancestry estimates from Recife subjects were in accordance with previous studies, showing that Northeastern Brazilian populations show great influence from European ancestry (59.7\%), followed by African (23.0\%) and Amerindian (17.3\%) ancestries. Ethnicity self-classification according to skin-color was confirmed to be a poor indicator of population substructure in Brazilians, since ancestry estimates overlapped between classifications. Thus, our streamlined panel of 12 markers may substitute panels with more markers, while retaining the capacity to control for population substructure and admixture, thereby reducing sample processing time.

}, issn = {1676-5680}, doi = {10.4238/2015.March.31.18}, author = {Coelho, A V C and Moura, R R and Cavalcanti, C A J and Guimar{\~a}es, R L and Sandrin-Garcia, P and Crovella, S and Brand{\~a}o, L A C} } @article {7690, title = {Short Communication FYB polymorphisms in Brazilian patients with type I diabetes mellitus and autoimmune polyglandular syndrome type III.}, journal = {Genet Mol Res}, volume = {14}, year = {2015}, month = {2015}, pages = {29-33}, abstract = {

The aim of this study was to perform an association study between seven Fyn-binding protein gene (FYB)-tag single nucleotide polymorphisms (SNPs) and type I diabetes mellitus (T1DM), as well as with disease age of onset. We also assessed the role of FYB SNPs in the insurgence of autoimmune polyglandular syndrome type III (APSIII), characterized by the simultaneous presence of autoimmune thyroid disease and celiac disease, in patients with T1DM from a Northeastern Brazilian population. One hundred and seventy-seven patients with T1DM and 190 healthy individuals were genotyped for seven tag SNPs, covering most of the FYB locus, using real-time polymerase chain reaction amplification. There was no significant difference in the distribution of allele and genotype frequencies among patients and healthy individuals. Moreover, none of the tag SNPs were associated either to T1DM age of onset or to the insurgence of APSIII. However, since the FYB protein is a key component in T cell response, its gene variants might play a role in protein function, which might be testable in a population with different genetic backgrounds or by using functional assays.

}, issn = {1676-5680}, doi = {10.4238/2015.January.15.4}, author = {Addobbati, C J C and de Azev{\^e}do Silva, J and Tavares, N A C and Araujo, J and Guimar{\~a}es, R L and Brand{\~a}o, L and Crovella, S and Sandrin-Garcia, P} } @article {3567, title = {HLA-G gene polymorphisms associated with susceptibility to rheumatoid arthritis disease and its severity in Brazilian patients.}, journal = {Tissue Antigens}, volume = {84}, year = {2014}, month = {2014 Sep}, pages = {308-15}, abstract = {

We analyzed the possible association between human leukocyte antigen-G (HLA-G) genetic variants, supposed to regulate HLA-G expression, and the susceptibility to develop rheumatoid arthritis (RA) as well as its clinical manifestations. The 5{\textquoteright}upstream regulatory region (5{\textquoteright}URR) and 3{\textquoteright}untranslated region (3{\textquoteright}UTR) regions of the HLA-G gene were screened in 127 RA patients and 128 controls: 10 5{\textquoteright}URR and 3 3{\textquoteright}UTR HLA-G polymorphisms as well as two haplotypes were associated with risk for RA development, while a polymorphism in the 5{\textquoteright}URR showed an association with the degree of disease activity. These findings, although the number of cases analyzed is limited and the P-values are modest, indicate a possible association between HLA-G gene polymorphisms and susceptibility to develop RA disease and its severity.

}, keywords = {3{\textquoteright} Untranslated Regions, 5{\textquoteright} Flanking Region, Aged, Arthritis, Rheumatoid, Brazil, Disease Progression, DNA Mutational Analysis, Female, Gene Frequency, Genetic Association Studies, Genetic Predisposition to Disease, Genotype, Haplotypes, HLA-G Antigens, Humans, Male, Middle Aged, Polymorphism, Single Nucleotide, Risk}, issn = {1399-0039}, doi = {10.1111/tan.12396}, author = {Catamo, E and Addobbati, C and Segat, L and Sotero Fragoso, T and Domingues Barbosa, A and Tavares Dantas, A and de Ata{\'\i}de Mariz, H and F da Rocha, L and Branco Pinto Duarte, A L and Monasta, L and Sandrin-Garcia, P and Crovella, S} } @article {1870, title = {Functional single-nucleotide polymorphisms in the DEFB1 gene are associated with systemic lupus erythematosus in Southern Brazilians.}, journal = {Lupus}, volume = {21}, year = {2012}, month = {2012 May}, pages = {625-31}, abstract = {

Systemic lupus erythematosus (SLE) is an autoimmune disease that results in inflammation and tissue damage. The etiology of SLE remains unknown, but recent studies have shown that the innate immune system may have a role in SLE pathogenesis through the secretion of small cationic peptides named defensins. The aim of the study was to determine the possible involvement in SLE of three functional single nucleotide polymorphisms (SNPs) (c.-52G>A, c.-44C>G and c.-20G>A) in the 5{\textquoteright}UTR region of DEFB1 gene, by analyzing them in a population of 139 SLE patients and 288 healthy controls. The c.-52G>A SNP showed significant differences in allele and genotype frequency distribution between SLE patients and controls (p = 0.01 and p = 0.02 respectively) indicating protection against SLE (A allele, OR = 0.68, AA genotype OR = 0.51). Significant differences were also observed for c.-44C>G SNP, the C/G genotype being associated with susceptibility to SLE (OR = 1.60, p = 0.04). Moreover, statistically significant differences between patients and controls were found for two DEFB1 haplotypes (GCA and GGG, p = 0.01 and p = 0.02 respectively). When considering DEFB1 SNPs and SLE clinical and laboratory manifestations, significant association was found with neuropsychiatric disorders, immunological alterations and anti-DNA antibodies. In conclusion, our results evidence a possible role for the c.-52G>A and c.-44C>G DEFB1 polymorphisms in SLE pathogenesis, that can be considered as possible risk factors for development of disease and disease-related clinical manifestations. Additional studies are needed, to corroborate these results as well as functional studies to understand the biological role of these SNPs in the pathogenesis of SLE.

}, keywords = {Adolescent, Adult, Aged, beta-Defensins, Brazil, Case-Control Studies, Female, Genetic Predisposition to Disease, Genotype, Haplotypes, Humans, Lupus Erythematosus, Systemic, Male, Middle Aged, Polymorphism, Single Nucleotide, Risk Factors, Young Adult}, issn = {1477-0962}, doi = {10.1177/0961203312436858}, author = {Sandrin-Garcia, P and Brand{\~a}o, L A C and Guimar{\~a}es, R L and Pancoto, J A T and Donadi, E A and Lima-Filho, J L de and Segat, L and Crovella, S} }