Association between matrix metalloproteinase-9 gene polymorphism and breast cancer in Brazilian women

OBJECTIVE: This study aimed to determine the relationship between rs17576 (MMP-9) polymorphism and increased cancer risk in a Brazilian breast cancer cohort. METHODS: This study included 141 women (71 breast cancer patients and 70 controls without breast cancer) who donated 3 mL of their peripheral blood for genomic DNA extraction. This DNA was then genotyped using a real-time polymerase chain reaction. RESULTS: The AG (rs17576) genotype was identified in 26 (18.43%) participants in the case group and in 22 (15.60%) participants in the control group (p=0.274), while the GG genotype was identified in ten (7.09%) participants in the case group and in one (0.70%) participant in the control group (p<0.003 - OR (95% CI) 13.13 (1.73, 593.08). No significant difference in the incidence rates was observed for AG or GG rs17576 genotypes in premenopausal women, p=0.813 and p=0.556, respectively. However, in postmenopausal women, the AG genotype was shown to occur in 14 (22.5%) participants in the case group and in 4 (6.45%) participants in the control (p<0.043), while GG genotype occurred in eight (12.90%) of the individuals in the case group and in none of the individuals in the control group (p<0.006). CONCLUSION: In this study, the MMP-9 rs17576 GG polymorphic variant was shown to be significantly associated with breast cancer risk in premenopausal women, while the AG and GG genotypes were associated with increased cancer risk in postmenopausal women.

Inhibition of Mmp-9 Expression through Nf-Kβ by Natural Compounds as a Possible Therapeutic Adjuvant Strategy in Breast Cancer: A Systematic Review

MMP-9 expression may be induced at the transcriptional level in response to different agents. Due to its fundamental role in cancer progression, the control of MMP expression, especially MMP-9, is the possible target of future adjuvant therapies that seek to reduce metastases and angiogenesis in women with breast cancer. Therefore, the aim of this study was to search in the literature available evidences of extracts/or natural compounds that have potential therapeutic capacity to inhibit MMP-9 expression. Extracts and/or natural compounds identified in this review play a significant role in the inhibition of MMP-9 expression via NF-kβ, and may act on the prevention of metastases from primary breast tumors. The majority of the studies found have shown that natural products are capable of suppressing migration and invasion of breast cancer cells, thus inhibiting the formation of in vitro metastases. Further studies are warranted to understand the potential mechanisms of breast cancer metastasis from signaling cascades intrinsic to the tumor. Moreover, the NF-kβ, followed by Mitogen Activated Protein Kinases / Activator protein 1 (MAPK / AP-1) were the major pathways affected by the extracts and / or compounds studied. These pathways are directly linked to MMP-9 expression.

Análise das características de indivíduos com sequelas de traumatismo cranioencefálico (TCE) em um centro de referência em reabilitação (características de TCE) / Analysis of the characteristics of individuals with traumatic brain injury (TBI) in a rehabilitation reference center (TBI characteristics)

INTRODUÇÃO: O Traumatismo Cranioencefálico (TCE)é definido como uma alteração na função encefálica, devido a uma causa externa, ou seja, algum trauma físico de origem externa e que leva à morbimortalidade e incapacidades em todo o mundo. OBJETIVO: Analisar as características (aspectos sociodemográficos, causa do TCE; custos com saúde) de indivíduos com sequelas de traumatismo cranioencefálico em um centro de referência em reabilitação. METODOLOGIA: Estudo de natureza descritiva,retrospectiva e quantitativa no período de janeiro de 2009 a dezembro de 2013, por meio de análise documental, resultando em uma amostra final de 88 prontuários analisados. Foram incluídos indivíduos de ambos os sexos, com idade igual ou superior a dois anos de vida. RESULTADOS: Dos indivíduos com sequelas de TCE, 86,36% eram do sexo masculino, com idade entre 18 e 59 anos (80,68%), apresentando ensino médio completo (26,14%), de cor parda (52,27%) e com renda familiar entre um e cinco salários mínimos (60,23%). A causa mais frequente de TCE foi o acidente motociclístico (68,18%). Não houve diferença estatística entre tipos de causa de TCE e custos com saúde. CONCLUSÃO: O presente estudo demonstrou que grande parte dos indivíduos eram homens jovens e vítimas de acidente motociclístico.(AU)

INTRODUCTION: traumatic brain injury (TBI) is defined as a change in brain function due to an external cause, that is, some external physical trauma that leads to morbidity and mortality, disabilities and mortality worldwide. OBJECTIVE: To analyze the characteristics (Socio-demographic aspects; causes of TBI; Health costs) of individuals with traumatic brain injury sequelae in a referral center for rehabilitation. METHODOLOGY: descriptive, retrospective and quantitative study from January 2009 to December 2013, Through documentary analysis, resulting in a final sample of 88 analyzed medical records. Individuals of both sexes, aged 2 years or more, were included. RESULTS: Of the individuals with TBI sequelae, 86.36% were male, aged between 18 and 59 years (80.68%), with completed secondary education (26.14%), mulatto (52.27 %) and family income between 1 and 5 minimum wages (60.23%). The most frequent cause of TBI were motorcycle accidents (68.18%). There was no statistical difference between types of cause of TBI and health care costs. CONCLUSION: This study showed that most individuals were young men, motorcycle accident victims and who lost work capacity. (AU)