Color, Race, and Genomic Ancestry in Brazil: Dialogues between Anthropology and Genetics

Posted in Anthropology, Articles, Brazil, Caribbean/Latin America, Health/Medicine/Genetics, Media Archive on 2011-12-03 18:13Z by Steven

Color, Race, and Genomic Ancestry in Brazil: Dialogues between Anthropology and Genetics

Current Anthropology
Volume 50, Number 6 (2009)
pages 787-819
DOI: 10.1086/644532

Ricardo Ventura Santos, Professor of Biological Anthropology and Public Health
Oswaldo Cruz Foundation
also Associate professor of Anthropology
National Museum, Rio de Janeiro, Brazil

Peter H. Fry, Professor
Federal University of Rio de Janeiro, Departamento de Antropologia
Instituto de Filosofia e Ciências Sociais/UFRJ, Largo de São Francisco de Paula 1

Simone Monteiro, Senior Researcher
Oswaldo Cruz Institute

Marcos Chor Maio, Senior Researcher
House of Oswaldo Cruz
Oswaldo Cruz Foundation

José Carlos Rodrigues, Professor
Fluminense Federal University
also Associate Professor
Catholic University

Luciana Bastos-Rodrigues
Department of Biochemistry and Immunology at the Institute of Biological Sciences
Federal University of Minas Gerais

Sérgio D. J. Pena, Professor of Biochemistry and Immunology
Institute of Biological Sciences
Federal University of Minas Gerais

In the contemporary world, “race” narratives are so multifaceted that at times, different views of the concept appear mutually incompatible. In recent decades biologists, especially geneticists, have repeatedly stated that the notion of race does not apply to the human species. On the other hand, social scientists claim that race is highly significant in cultural, historical, and socioeconomic terms because it molds everyday social relations and because it is a powerful motivator for social and political movements based on race differences. In this paper we present the results of an interdisciplinary research project incorporating approaches from genetics and anthropology. Our objective is to explore the interface between information about biology/genetics and perceptions about color/race in Rio de Janeiro, Brazil. We argue that the data and interpretation of our research resonate far beyond the local level, stimulating discussion about methodological, theoretical, and political issues of wider national and international relevance. Topics addressed include the complex terminology of color/race classification in Brazil, perceptions about ancestry in the context of ideologies of Brazilian national identity, and the relationship between genetic information about the Brazilian population and a sociopolitical agenda that turns on questions of race and racism.

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Between black and miscegenated population groups: sickle cell anemia and sickle cell trait in Brazil in the 1930s and 1940s

Posted in Articles, Brazil, Caribbean/Latin America, Health/Medicine/Genetics, Media Archive on 2011-11-12 05:34Z by Steven

Between black and miscegenated population groups: sickle cell anemia and sickle cell trait in Brazil in the 1930s and 1940s

História, Ciências, Saúde-Manguinhos
Volume 18, Number 2 (April/June 2011)
29 pages
DOI: 10.1590/S0104-59702011000200007

Juliana Manzoni Cavalcanti, PhD candidate
Graduate Program on History of the Sciences and Health
Casa de Oswaldo Cruz/Fundação Oswaldo Cruz

Marcos Chor Maio, Senior Researcher and Professor
Graduate Program on History of the Sciences and Health
Fiocruz – Casa de Oswaldo Cruz

Translated by Diane Grosklaus Whitty

The article examines medical and scientific studies of sickle cell anemia published in Brazil in the 1930s and 1940s, when the vast majority of physicians and scientists believed that miscegenation played a significant role in the epidemiology of the disease in the country. Special focus is placed on hematologist Ernani Martins da Silva, of the Oswaldo Cruz Institute, who conducted blood analyses around the interior of Brazil with the purpose of classifying miscegenated and allegedly pure population groups based on the presence of sickle cells and the racial distribution of blood groups. The article explores the ambivalences stemming from associations between sickle cell anemia and the ‘black race’ during this period.

The term sickle cell disease (SCD) is applied to disorders caused by a specific change in the hemoglobin molecule, an oxygen-carrying molecule that is one of the most abundant within red blood cells. Genetic alteration causes one amino acid to be replaced with another in the protein chains that make up hemoglobin (with ß6 glutamic acid replaced by valine – Hb S), thereby altering the molecule’s structure. This change lowers the affinity between the oxygen molecule and hemoglobin, prompting the formation of long hemoglobin chains that clump into intracellular bundles concentrated at the ends of the red blood cell and thus distort the cell into the crescent shape from which it gains its name (Andreoli et al., 1997, p.371)…

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