@article {8517, title = {Plant Elite Squad: First Defense Line and Resistance Genes - Identification, Diversity and Functional Roles.}, journal = {Curr Protein Pept Sci}, year = {2016}, month = {2016 Jul 24}, abstract = {

Plants exhibit sensitive mechanisms to respond to environmental stresses, presenting some specific and non-specific reactions when attacked by pathogens, including organisms from different classes and complexity, as viroids, viruses, bacteria, fungi and nematodes. A crucial step to define the fate of the plant facing an invading pathogen is the activation of a compatible Resistance (R) gene, the focus of the present review. Different aspects regarding R-genes and their products are discussed, including pathogen recognition mechanisms, signaling and effects on induced and constitutive defense processes, splicing and post transcriptional mechanisms involved. There are still countless challenges to the complete understanding of the mechanisms involving R-genes in plants, in particular those related to the interactions with other genes of the pathogen and of the host itself, their regulation, acting mechanisms at transcriptional and post-transcriptional levels, as well as the influence of other types of stress over their regulation. A magnification of knowledge is expected when considering the novel information from the omics and systems biology.

}, issn = {1875-5550}, author = {Wanderley-Nogueira, Ana Carolina and Bezerra-Neto, Jo{\~a}o Pac{\'\i}fico and Kido, {\'E}derson Akio and de Ara{\'u}jo, Fl{\'a}via Tadeu and Amorim, Lidiane Lindinalva Barbosa and Crovella, Sergio and Benko-Iseppon, Ana Maria} } @article {8518, title = {Plants Defense-related Cyclic Peptides: Diversity, Structure and Applications.}, journal = {Curr Protein Pept Sci}, year = {2016}, month = {2016 Jul 24}, abstract = {

Plant growth is prone to several unfavorable factors that may compromise or impair development and survival, including abiotic or biotic stressors. Aiming at defending themselves, plants have developed several strategies to survive and adapt to such adversities. Cyclotides are a family of plant-derived proteins that exhibit a diverse range of biological activities including antimicrobial and insecticidal activities that actively participate in plant defense processes. Three main categories of peptides have been described: (i) Cyclotides (ii) Sunflower Trypsin Inhibitor (SFTI) and (iii) peptides MCoTI-I and II, from Momordica cochinchinensis. They comprise proteins of approximately 30 amino acids, containing a head-to-tail cyclized backbone, with three disulfide bonds configured in a cystine knot topology, therefore bearing greater peptide stability. Given their features and multifunctionality, cyclotides stand out as promising sources for the discovery of new antimicrobial agents. The present review describes cyclotide occurrence, abundance and action in plants, also their diversity and evolution. Considerations regarding their use in the context of biomedical and agronomical sciences uses are also presented.

}, issn = {1875-5550}, author = {Maria, Ana Carolina Wanderley-Nogueira and Bezerra-Neto, Jo{\~a}o Pac{\'\i}fico and Kido, {\'E}derson Akio and de Ara{\'u}jo, Fl{\'a}via Tadeu and Amorim, Lidiane Lindinalva Barbosa and Crovella, Sergio and Benko-Iseppon, Ana Maria} } @article {8306, title = {Protective Role of BST2 Polymorphisms in Mother-to-Child Transmission of HIV-1 and Adult AIDS Progression.}, journal = {J Acquir Immune Defic Syndr}, volume = {72}, year = {2016}, month = {2016 Jul 1}, pages = {237-41}, abstract = {

Bone marrow stromal cell antigen-2 (BST-2)/Tetherin is a restriction factor that prevents Human immunodeficiency virus type 1 (HIV-1) release from infected cells and mediates pro-inflammatory cytokine production. This study investigated the risk conferred by single nucleotide polymorphisms (rs919266, rs9192677, and rs9576) at BST-2 coding gene (BST2) in HIV-1 mother-to-child transmission and in disease progression. Initially, 101 HIV-1+ pregnant women and 331 neonates exposed to HIV-1 from Zambia were enrolled. Additional BST2 single nucleotide polymorphism analyses were performed in 2 cohorts with acquired immunodeficiency syndrome (AIDS) progression: an adult Brazilian cohort (37 rapid, 30 chronic and 21 long-term non-progressors) and an Italian pediatric cohort (21 rapid and 67 slow progressors). The rs9576A allele was nominally associated with protection during breastfeeding (P = 0.019) and individuals carrying rs919266 GA showed slower progression to AIDS (P = 0.033). Despite the influence of rs919266 and rs9576 on BST2 expression being still undetermined, a preventive role by BST2 polymorphisms was found during HIV-1 infection.

}, issn = {1944-7884}, doi = {10.1097/QAI.0000000000000949}, author = {Kamada, Anselmo J and Bianco, Anna M and Zupin, Luisa and Girardelli, Martina and Matte, Maria C C and Medeiros, R{\'u}bia Mar{\'\i}lia de and Almeida, Sabrina Esteves de Matos and Rocha, Marineide M and Segat, Ludovica and Chies, Jos{\'e} A B and Kuhn, Louise and Crovella, Sergio} } @article {8315, title = {Putative modifier genes in mevalonate kinase deficiency.}, journal = {Mol Med Rep}, volume = {13}, year = {2016}, month = {2016 Apr}, pages = {3181-9}, abstract = {

Mevalonate kinase deficiency (MKD) is an autosomal recessive auto-inflammatory disease, caused by impairment of the mevalonate pathway. Although the molecular mechanism remains to be elucidated, there is clinical evidence suggesting that other regulatory genes may be involved in determining the phenotype. The identification of novel target genes may explain non-homogeneous genotype-phenotype correlations, and provide evidence in support of the hypothesis that novel regulatory genes predispose or amplify deregulation of the mevalonate pathway in this orphan disease. In the present study, DNA samples were obtained from five patients with MKD, which were then analyzed using whole exome sequencing. A missense variation in the PEX11γ gene was observed in homozygosis in P2, possibly correlating with visual blurring. The UNG rare gene variant was detected in homozygosis in P5, without correlating with a specific clinical phenotype. A number of other variants were found in the five analyzed DNA samples from the MKD patients, however no correlation with the phenotype was established. The results of the presents study suggested that further analysis, using next generation sequencing approaches, is required on a larger sample size of patients with MKD, who share the same MVK mutations and exhibit {\textquoteright}extreme{\textquoteright} clinical phenotypes. As MVK mutations may be associated with MKD, the identification of specific modifier genes may assist in providing an earlier diagnosis.

}, issn = {1791-3004}, doi = {10.3892/mmr.2016.4918}, author = {Marcuzzi, Annalisa and Vozzi, Diego and Girardelli, Martina and Tricarico, Paola Maura and Knowles, Alessandra and Crovella, Sergio and Vuch, Josef and Tommasini, Alberto and Piscianz, Elisa and Bianco, Anna Monica} } @article {7695, title = {Pediatric patients with inflammatory bowel disease exhibit increased serum levels of proinflammatory cytokines and chemokines, but decreased circulating levels of macrophage inhibitory protein-1β, interleukin-2 and interleukin-17.}, journal = {Exp Ther Med}, volume = {9}, year = {2015}, month = {2015 Jun}, pages = {2047-2052}, abstract = {

Inflammatory bowel disease (IBD) is a chronic and progressive inflammatory condition of the gastrointestinal tract. Although the causative events that lead to the onset of IBD are yet to be fully elucidated, deregulation of immune and inflammatory mechanisms are hypothesized to significantly contribute to this disorder. Since the onset of IBD is often during infancy, in the present study, the serum values of a large panel of cytokines and chemokines in pediatric patients (<18 years; n=26) were compared with age-matched controls (n=37). While elevations in the serum level of several proinflammatory and immune regulating cytokines were confirmed, such as interleukin (IL)-1β, IL-5, IL-7, interferon (IFN)-γ-inducible protein-10, IL-16, cutaneous T-cell-attracting chemokine, leukemia inhibitory factor, monokine induced by γ-IFN, IFN-α2 and IFN-γ, notably decreased levels of IL-2, IL-17 and macrophage inhibitory protein-1β were also observed. Therefore, while a number of proinflammatory cytokines exhibit increased levels in IBD patients, pediatric IBD patients may also exhibit certain aspects of a reduced immunological response.

}, issn = {1792-0981}, doi = {10.3892/etm.2015.2370}, author = {Kleiner, Giulio and Zanin, Valentina and Monasta, Lorenzo and Crovella, Sergio and Caruso, Lorenzo and Milani, Daniela and Marcuzzi, Annalisa} } @article {1871, title = {Polimorphisms in inflammasome genes are involved in the predisposition to systemic lupus erythematosus.}, journal = {Autoimmunity}, volume = {45}, year = {2012}, month = {2012 Jun}, pages = {271-8}, abstract = {

Recent findings provide evidence of inflammasome critical role in the predisposition to autoimmune disorders. The involvement of inflammasome in the pathogenesis of systemic lupus erythematosus (SLE) has been hypothesized even if no significant association within inflammasome genes mutations or polymorphisms and lupus has been reported yet. We analyzed 14 single nucleotide polymorphisms (SNPs) within 7 inflammasome genes (NLRP1, NLRP3, NLRC4, AIM2, CARD8, CASP1, IL1B) in 144 patients affected by systemic lupus erythematosus and in 158 healthy controls from Southern Brazilian (state of S{\~a}o Paulo) with the aim of disclosing the possible role of inflammasome genes in the susceptibility of SLE. Our results demonstrated that NLRP1 rs2670660 SNP and the NLRP1 rs12150220-rs2670660 A-G haplotype were associated with SLE in our study population, and in particular with the development of nephritis, rash and arthritis. These findings are concordant with previously reported association of NLRP1 with vitiligo and type-1 diabetes underlining once more the involvement of NALP1 inflammasome in the pathogenesis of autoimmune disorders.

}, keywords = {Adaptor Proteins, Signal Transducing, Adult, Alleles, Apoptosis Regulatory Proteins, Brazil, Female, Genetic Predisposition to Disease, Genotype, Haplotypes, Humans, Inflammasomes, Lupus Erythematosus, Systemic, Male, Middle Aged, Polymorphism, Single Nucleotide}, issn = {1607-842X}, doi = {10.3109/08916934.2011.637532}, author = {Pontillo, Alessandra and Girardelli, Martina and Kamada, Anselmo J and Pancotto, Joao A T and Donadi, Eduardo A and Crovella, Sergio and Sandrin-Garcia, Paula} } @article {1963, title = {Polymorphisms in DC-SIGN and L-SIGN genes are associated with HIV-1 vertical transmission in a Northeastern Brazilian population.}, journal = {Hum Immunol}, volume = {73}, year = {2012}, month = {2012 Nov}, pages = {1159-65}, abstract = {

DC-SIGN and L-SIGN are receptors expressed on specialized macrophages in decidua, (Hofbauer and placental capillary endothelial cells), known to interact with several pathogens, including HIV-1. To disclose the possible involvement of these molecules in the susceptibility to HIV vertical transmission, we analyzed DC-SIGN and L-SIGN gene single nucleotide polymorphisms (SNPs) in 192 HIV-1 positive children and 58 HIV-1 negative children all born to HIV-1 positive mothers, as well as 96 healthy uninfected children not exposed to HIV-1, all from Northeast Brazil. The frequency of three SNPs in the DC-SIGN promoter (-139G>A, -201G>T and -336A>G) were significantly different when comparing HIV positive children with HIV-1 exposed uninfected children, indicating an association with susceptibility to HIV-1 vertical transmission. This genetic association suggests that DC-SIGN molecule may play a role in susceptibility to HIV-1 infection through vertical transmission.

}, keywords = {Alleles, Brazil, Cell Adhesion Molecules, Child, Child, Preschool, Exons, Female, Gene Frequency, Genotype, HIV Infections, HIV-1, Humans, Infectious Disease Transmission, Vertical, Lectins, C-Type, Male, Polymorphism, Single Nucleotide, Promoter Regions, Genetic, Receptors, Cell Surface, Tandem Repeat Sequences}, issn = {1879-1166}, doi = {10.1016/j.humimm.2012.07.338}, author = {da Silva, Ronaldo Celerino and Segat, Ludovica and Zanin, Valentina and Arraes, Luiz Claudio and Crovella, Sergio} } @article {1905, title = {Polymorphisms in inflammasome{\textquoteright} genes and susceptibility to HIV-1 infection.}, journal = {J Acquir Immune Defic Syndr}, volume = {59}, year = {2012}, month = {2012 Feb 1}, pages = {121-5}, abstract = {

The involvement of inflammasome genes in the susceptibility to HIV-1 infection was investigated. Twelve single nucleotide polymorphisms within NLRP1, NLRP3, NLRC4, CARD8, CASP1, and IL1B genes were analyzed in 150 HIV-1-infected Brazilian subjects and 158 healthy controls. The 2 polymorphisms rs10754558 in NLRP3 and rs1143634 in IL1B were significantly associated to the HIV-1 infection. These findings supported the previously hypothesized involvement of NALP3-inflammasome in HIV-1 pathogenesis, underlining once more the key role of inflammation and innate immunity in the susceptibility to HIV-1 infection.

}, keywords = {Adaptor Proteins, Signal Transducing, Adult, Apoptosis Regulatory Proteins, Brazil, Calcium-Binding Proteins, CARD Signaling Adaptor Proteins, Carrier Proteins, Caspase 1, Female, Gene Frequency, Genetic Predisposition to Disease, Genotype, HIV Infections, HIV-1, Humans, Inflammasomes, Interleukin-1beta, Intracellular Signaling Peptides and Proteins, Male, Middle Aged, Neoplasm Proteins, Polymorphism, Single Nucleotide}, issn = {1944-7884}, doi = {10.1097/QAI.0b013e3182392ebe}, author = {Pontillo, Alessandra and Oshiro, Telma M and Girardelli, Martina and Kamada, Anselmo J and Crovella, Sergio and Duarte, Alberto J S} } @article {1733, title = {Phospholipase C-β3 is a key modulator of IL-8 expression in cystic fibrosis bronchial epithelial cells.}, journal = {J Immunol}, volume = {186}, year = {2011}, month = {2011 Apr 15}, pages = {4946-58}, abstract = {

Respiratory insufficiency is the major cause of morbidity and mortality in patients affected by cystic fibrosis (CF). An excessive neutrophilic inflammation, mainly orchestrated by the release of IL-8 from bronchial epithelial cells and amplified by chronic bacterial infection with Pseudomonas aeruginosa, leads to progressive tissue destruction. The anti-inflammatory drugs presently used in CF patients have several limitations, indicating the need for identifying novel molecular targets. To address this issue, we preliminarily studied the association of 721 single nucleotide polymorphisms from 135 genes potentially involved in signal transduction implicated in neutrophil recruitment in a cohort of F508del homozygous CF patients with either severe or mild progression of lung disease. The top ranking association was found for a nonsynonymous polymorphism of the phospholipase C-β3 (PLCB3) gene. Studies in bronchial epithelial cells exposed to P. aeruginosa revealed that PLCB3 is implicated in extracellular nucleotide-dependent intracellular calcium signaling, leading to activation of the protein kinase Cα and Cβ and of the nuclear transcription factor NF-κB p65. The proinflammatory pathway regulated by PLCB3 acts by potentiating the Toll-like Receptors{\textquoteright} signaling cascade and represents an interesting molecular target to attenuate the excessive recruitment of neutrophils without completely abolishing the inflammatory response.

}, keywords = {Adenosine Triphosphate, Calcium, Cell Line, Transformed, Cystic Fibrosis, Enzyme Activation, Epithelial Cells, Gene Expression, Gene Frequency, Genotype, Green Fluorescent Proteins, Host-Pathogen Interactions, Humans, Interleukin-8, Isoenzymes, Lung Diseases, Microscopy, Fluorescence, Phospholipase C beta, Polymorphism, Single Nucleotide, Protein Kinase C, Protein Kinase C beta, Pseudomonas aeruginosa, RNA Interference, Toll-Like Receptors, Transcription Factor RelA}, issn = {1550-6606}, doi = {10.4049/jimmunol.1003535}, author = {Bezzerri, Valentino and d{\textquoteright}Adamo, Pio and Rimessi, Alessandro and Lanzara, Carmen and Crovella, Sergio and Nicolis, Elena and Tamanini, Anna and Athanasakis, Emmanouil and Tebon, Maela and Bisoffi, Giulia and Drumm, Mitchell L and Knowles, Michael R and Pinton, Paolo and Gasparini, Paolo and Berton, Giorgio and Cabrini, Giulio} } @article {1752, title = {A polymorphism in PRF1 gene is associated with HIV-1 vertical transmission in Brazilian children.}, journal = {AIDS}, volume = {25}, year = {2011}, month = {2011 Feb 20}, pages = {535-7}, abstract = {

We investigated the possible association between PRF1 gene polymorphisms and HIV-1 vertical transmission in Brazilian children by analyzing PRF1 gene coding and untranslated regions in 173 perinatally infected children (HIV+), 51 exposed uninfected (HIV-), and 171 HIV-unexposed uninfected children. Seven single nucleotide polymorphisms were identified in our samples. The rs885822 C allele and CC genotype were significantly more frequent in HIV-negative than in HIV-positive patients and associated with a protective effect toward HIV vertical transmission.

}, keywords = {Brazil, Female, HIV Infections, HIV-1, Humans, Infant, Newborn, Infectious Disease Transmission, Vertical, Male, Polymorphism, Genetic, Pore Forming Cytotoxic Proteins, Pregnancy}, issn = {1473-5571}, doi = {10.1097/QAD.0b013e3283428b7c}, author = {Padovan, Lara and Segat, Ludovica and Crovella, Sergio} } @article {1644, title = {A polymorphism in the 5{\textquoteright} UTR of the DEFB1 gene is associated with the lung phenotype in F508del homozygous Italian cystic fibrosis patients.}, journal = {Clin Chem Lab Med}, volume = {49}, year = {2011}, month = {2011 Jan}, pages = {49-54}, abstract = {

BACKGROUND: The identification of cystic fibrosis (CF) patients who are at greater risk of lung damage could be clinically valuable. Thus, we attempted to replicate previous findings and verify the possible association between three single nucleotide polymorphisms (SNPs c.-52G>A, c.-44C>G and c.-20G>A) in the 5{\textquoteright} untranslated region (5{\textquoteright} UTR) of the β defensin 1 (DEFB1) gene and the CF pulmonary phenotype.

METHODS: Genomic DNA from 92 Italian CF patients enrolled in different regional CF centres was extracted from peripheral blood and genotyped for DEFB1 SNPs using TaqMan({\textregistered}) allele specific probes. In order to avoid genetic confounding causes that can account for CF phenotype variability, all patients were homozygous for the F508del CFTR mutation, and were then classified on the basis of clinical and functional data as mild lung phenotype (Mp, n=50) or severe lung phenotype patients (Sp, n=42).

RESULTS: For the c.-20G>A SNP, the frequency of the A allele, as well as the AA genotype, were significantly more frequent in Mp than in Sp patients, and thus this was associated with a protective effect against severe pulmonary disease (OR=0.48 and 0.28, respectively). The effect of the c.-20G>A A allele is consistent with a recessive model, and the protective effect against Sp is exerted only when it is present in homozygosis. For the other two SNPs, no differences were observed as allelic and genotypic frequency in the two subgroups of CF patients.

CONCLUSIONS: Our results, although necessary to be confirmed in larger and multiethnic populations, reinforce DEFB1 as a candidate modifier gene of the CF pulmonary phenotype.

}, keywords = {5{\textquoteright} Untranslated Regions, Adult, beta-Defensins, Cystic Fibrosis, Cystic Fibrosis Transmembrane Conductance Regulator, Female, Genotype, Homozygote, Humans, Italy, Male, Mutation, Phenotype, Polymorphism, Genetic, Young Adult}, issn = {1437-4331}, doi = {10.1515/CCLM.2011.023}, author = {Crovella, Sergio and Segat, Ludovica and Amato, Annalisa and Athanasakis, Emmanouil and Bezzerri, Valentino and Braggion, Cesare and Casciaro, Rosaria and Castaldo, Giuseppe and Colombo, Carla and Covone, Angela Elvira and De Rose, Virginia and Gagliardini, Rolando and Lanzara, Carmen and Minicucci, Laura and Morgutti, Marcello and Nicolis, Elena and Pardo, Francesca and Quattrucci, Serena and Raia, Valeria and Ravazzolo, Roberto and Seia, Manuela and Stanzial, Valentino and Termini, Lisa and Zazzeron, Laura and Cabrini, Giulio and Gasparini, Paolo} }