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Ethnicity is an important determinant of blood pressure levels, being black individuals affected more than any other ethnic group. Arterial stiffening, an independent risk factor for hypertension, is also influenced by ethnicity. However, whether black individuals from different continents would have different patterns of arterial stiffening is still unknown. Thus, the authors aimed to compare pulse wave velocity (PWV) in black subjects living in Angola and Brazil. A total of 677 black individuals from two independent cross-sectional studies conducted in Brazil and Angola were included in this analysis. Carotid-to-femoral PWV was measured following the same protocols for both studies, as well as clinical and anthropometric variables. Adjusted PWV was higher in Brazilian blacks than in Angolans, regardless of sex (men from Brazil: 10.7 ± 1.8 vs men from Angola: 9.9 ± 1.8 m/s, P < .001; women from Brazil: 10.3 ± 1.5 vs women from Angola: 9.2 ± 1.3 m/s, P < .001). Although the cf-PWV was higher in Brazilian blacks, the age-related increase in cf-PWV was higher in Angolan men compared to Brazilians, but not in women. SBP showed the strongest association with cf-PWV, regardless of sex and country. However, age was associated with cf-PWV in all groups, except in Brazilian men. Our results clearly show a difference in PWV between two black populations, and highlight for sex differences in the hemodynamic parameters that might affect blood pressure levels in these populations. [ABSTRACT FROM AUTHOR]

Race is a fundamental aspect of historical inequality and institutions, yet it is at times overlooked within the literature on comparative development in the Americas. This article investigates the nature of staple production in Brazil and attendant changes in the racial composition of 20 modern states from its discovery by the Portuguese to the present. The Indigenous population was surpassed by that of African descent in the north-east, south-east, and north, respectively, during the seventeenth and eighteenth centuries; not until decades after the abolition of slavery did people of European heritage come to constitute a majority. These transitions were guided by the relative productivity, natural increase, and price of Native and African slaves, contingent on the extent of natural resource wealth (mineral deposits or land suitable for growing cash crops) and supply of free labour. In those areas where slavery was most profitable, a 1 per cent increase in the relative cost of Native labour raised the proportion of people of African ancestry by up to 2 per cent, depending on the measures of slave prices and racial classifications considered. This relationship is robust to changes in output prices or the populace of European descent, and alternative scenarios of aboriginal population decline. [ABSTRACT FROM AUTHOR]

The article links reflections about Brazilian race relations with institutional transnational dialogues between Brazil and ' Africa'. I point out that although racial/cultural mixture and the 'brown' census category have traditionally reflected much of national identity in Brazil, Brazil today is increasingly spelling out its blackness, both on the national and international scenes. I highlight that, not by coincidence, this fact is happening at a historical moment when programmes of 'black' affirmative action and other differential politics in favour of Afro-descendants are taking off in the country, and also at a time when Brazil is expanding its geopolitical and economic interests in Africa. [ABSTRACT FROM AUTHOR]

The article discusses the inferior representations of Black masculinity in Brazilian history and society. The depiction of Brazilian Black population in mass media, literature and the arts as inferior to the whites and other non-Blacks is a result of European migration in the 19th century. The stereotypical characteristics, even accepted by the elite, conjures up an image of a Black man who is anti-progress, violent and a threat to societal change and order.

This paper examines the Afro-Brazilian afoxé as a form of cultural struggle that critically contests narratives and practices that reproduce racial inequality in contemporary Brazil. Through their afoxé in the interior of São Paulo, the Orùnmilá Cultural Center mobilizes Afro-Brazilian knowledge and cultural practices to challenge culturalist treatments of Afro-Brazilian 'difference' in the management and representation of carnaval. I explore how such treatments reflect broader state-orchestrated attempts to undermine black anti-racism and the implementation of substantive policies to address racial inequality in various spheres, including education and culture. The afoxé and the Orùnmilá Center's broader work constitute an important, contemporary means through which black organizations in Brazil make visible and vocal public claims for representation and self-determination. Such work pushes policy-makers and academics to reinterpret the terms of black inclusion vis-à-vis subaltern or 'other' cultures, historical experiences, perspectives, and participation in societal transformation. [ABSTRACT FROM AUTHOR]

Objectives The human leucocyte antigen (HLA) has been related to susceptibility factors in several diseases. This study aimed to determine the potential genetic susceptibility of patients with pityriasis rosea (PR) through HLA molecular typing analysis. Methods The method of choice was polymerase chain reaction with sequence-specific primers (PCR-SSP) using low-resolution typing kits, with determination of the alleles class I (HLA-A, HLA-B and HLA-C) and class II (HLA-DRB1, DRB3, DRB4, DRB5 and DQB1) performed in 30 Afro-Brazilian PR-diagnosed patients and 45 healthy individuals as the control group (PR-C). Results Analysis of the HLA typing results showed that the relative risk (RR) of 4.00 [95% confidence interval (95% CI) 1.20–13.28, two-tailed P = 0.018] for allele HLA-DQB1*04 class II, detected in 33.3% of PR patients, was significant. By contrast, in the control group only 11.1% of subjects had that allele. Three out of six B*51 alleles and three out of six B*53 alleles detected in PR patients were found, together with the allele DQB1*04. Conclusion We suggest that alleles DQB1*04 may be involved in the genetic susceptibility of PR based on the significant predominance of those alleles observed in the black PR patients. We also recommend that more studies are conducted on populations of other ethnic origins, preferentially with higher resolution techniques of DNA typing. [ABSTRACT FROM AUTHOR]

Focuses on the relationship of the Christian mission and the Afro-Brazilian people in Brazil. Practice of African slavery in Brazil; Theology of transmigration for the Africans; Injustices historically committed with regard to Amerindians and Afro-Brazilians; Issues on racism in society as reflected in the structures, theologies and ecclesiastic practices; Description of the Quilombo and the Terreiros.

Focuses on the racial, social, and culture dimensions of the construction of a black identity in Bahia, Brazil. Analysis of the formation of current Bahia racism; Status of slaves; Systematic policy of whitening; Ideology of racial democracy; Racial and unracial self-image of blacks; Place of blacks in the social hierarchy.

We describe the combination of polymorphic restriction-enzyme sites in the β globin gene cluster (haplotypes) for 74 chromosomes from Brazilian Blacks bearing the sickle hemoglobin gene (βs). The three most common African βs haplotypes account for 67 chromosomes: 49/74 (66.2%) were identified as Central African Republic (CAR or Bantu) type, 17 (23.0%) as Benin, and one as Senegal; seven chromosomes (9.5%) had minor atypical haplotypes. This distribution is different from that observed in the United States or Jamaica, where the Benin haplotype predominates, and results from different patterns of slave trades to North and South Americas. Since the βs gene cluster polymorphisms modulate the severity of sickle cell anemia, this heterogeneity may explain differences of the clinical behavior of the disease in the United States and South America, and should also be considered in relation to other features and diseases. © 1992 Wiley-Liss, Inc. [ABSTRACT FROM AUTHOR]