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Sex determination of human remains from peptides in tooth enamel

ABSTRACT: Biological sex determination of human remains by means of a minimally destructive surface acid etch of tooth enamel and subsequent identification of sex chromosome linked isoforms of Amelogenin– an enamel-forming protein - by nano-liquid chromatography mass spectrometry(nanoLC-MS).

INSTRUMENT(S): LTQ Orbitrap

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Tooth Enamel

SUBMITTER: Nicolas Stewart

LAB HEAD: Nicolas Andre Stewart

PROVIDER: PXD007856 | Pride | 2017-12-12

REPOSITORIES: pride

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			Action	DRS
	SK119.raw	Raw
	SK130.raw	Raw
	SK339.raw	Raw
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	SK363.raw	Raw

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Publications

Sex determination of human remains from peptides in tooth enamel.

Stewart Nicolas Andre NA Gerlach Raquel Fernanda RF Gowland Rebecca L RL Gron Kurt J KJ Montgomery Janet J

Proceedings of the National Academy of Sciences of the United States of America 20171211 52

The assignment of biological sex to archaeological human skeletons is a fundamental requirement for the reconstruction of the human past. It is conventionally and routinely performed on adults using metric analysis and morphological traits arising from postpubertal sexual dimorphism. A maximum accuracy of ∼95% is possible if both the cranium and os coxae are present and intact, but this is seldom achievable for all skeletons. Furthermore, for infants and juveniles, there are no reliable morpholo ...[more]

PMID: 29229823

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Sex Determination of Infant Remains

Project description:This study tests the application of an innovative new method of sex determination utilizing enamel peptides on a sample of incompletely developed deciduous teeth, including those of perinates.

2021-01-28 | PXD021683 | Pride

Child murder in the Early Bronze Age: proteomic sex identification of a cold case from Schleinbach, Austria

Project description:The identification of sex-specific peptides in human tooth enamel by nanoflow liquid chromatography-tandem mass spectrometry (nanoLC-MS/MS) represents a quantum leap for the study of childhood and social relations more generally. Determining sex-related differences in prehistoric child rearing and mortality has been hampered by the inability to determine the biological sex of juveniles. We conducted nanoLC-MS/MS to identify sex-specific peptides in the dental enamel of a child from a settlement pit of the Early Bronze Age settlement of Schleinbach, Austria (c. 1950–1850 BC). Four perimortal impression fractures on the skull of the 5–6-year-old child indicate an intentional killing, with a co-buried loom weight as possible murder weapon. Proteomic analysis, conducted for the first time on prehistoric teeth in Austria, determined the child’s sex as male. While we cannot conclusively decide whether the child became the victim of conflicts between village groups or was slain by members of his own community, we suggest that contextual evidence points to the latter. A possible trigger of violence were the follow-on effects of an uncontrolled middle ear infection revealed by the osteological analysis. The boy from Schleinbach highlights the potential for further investigation of gender-biased violence, infanticide and child murder based on the recently developed method of proteomic sex identification.

2021-06-01 | PXD018069 | Pride

Gendered burial practices of early Bronze Age children align with peptide-based sex identification: a case study from Franzhausen I, Austria

Project description:Gendered burial practices that differentiate between men and women by the way the body was placed were used over large parts of Central Europe in the Late Neolithic and Early Bronze Age (c. 2900−1600 BC). The differentiation of bodies placed on the left/right side in opposite orientation was extended to children, but until recently, it was difficult to confirm if the biological sex of the children matched the classification as men and women. We applied nanoflow liquid chromatography-tandem mass spectrometry (nanoLC-MS/MS) to identify sex-specific peptides in human tooth enamel in 75 children buried at one of the largest Early Bronze Age cemeteries in Europe, Franzhausen I, Austria, 70 of which produced reliable results. The study confirmed that the sex of the children corresponds to the gendered body position in 98.4 % of cases. For burials in which the gendered sidedness and orientation are not internally consistent with the male or female pattern, we found that the sidedness of the body corresponds to the sex of the children rather than the orientation.

2022-06-24 | PXD026419 | Pride

Sex estimation of human remains using the results of tooth enamel peptidomic analyses, LC-MSMS

Project description:Sex of individuals, estimated on human remains, is important information in anthropological, archaeological and forensic researches. In forensic anthropology, this is one of the key points for identifying a person. In archeology and paleoanthropology, information about sex is important for reconstructing the social and biological structure of a group, lifestyle, and for modeling demographic and growth processes in the past. Sex estimation of adult individuals is possible according to morphological criteria when metric and descriptive features are used. In case of poor preservation of the adult skeletons, as well as on children's remains, sex estimation by morphological criteria has some limitations. Therefore regular attempts are made to attract alternative methods for sexing human remains. As one of such methods a liquid chromatography-mass spectrometry analysis of tooth enamel peptides can be used. The result of this analysis is the identification of certain fragments of amelogenins - the main structural proteins of the organic matrix of tooth enamel, which make up more than 90% of its protein content. Amelogenin genes are located on both the X- and Y-chromosomes and the products of these genes have structural differences that allow them to be differentiated from each other. In the process of maturation of tooth enamel, its protein matrix undergoes proteolytic degradation, as a result enamel already contains proteins in the form of their peptide fragments. Reliable and reproducible detection of unique peptide fragments of amelogenins encoded on the X- and Y-chromosomes in human enamel will make it possible to estimate sex of human remains. The work presents a peptidomic analysis of tooth enamel using chromatography-mass spectrometry. Experiments were carried out on a series of teeth of various archaeological data, tafonomic condition of crown and different biological generations of teeth (deciduous and permanent ones).

2020-06-24 | PXD017965 | Pride

Sex estimation of a Neanderthal tooth fragment using a minimally destructive acid-etch method for dimorphic enamel peptide analysis

Project description:Using a minimally destructive acid-etch procedure, this study successfully identified sex from a Neanderthal tooth fragment (c. 90,100-92,000 years old).

2024-05-24 | PXD038154 | Pride

Gendering Prehistory Through Science. Women and Early Social Complexity in Copper Age Iberia.

Project description:Given the absence of written records, the main source of information available to analyze gender inequalities in early complex societies is the human body itself. And yet, for decades, archaeologists have struggled with the identification of the sex of poorly preserved human remains. Here we present an exceptional case study that shows how ground-breaking new scientific methods may address this problem. Through the analysis of sexually dimorphic amelogenin peptides in tooth enamel by nanoflow liquid chromatography-tandem mass spectrometry, we establish that the most socially prominent person of the Iberian Copper Age (c. 3200-2300 cal BC) was not male, as previously thought, but female. The meticulous anthropological, contextual and comparative analysis of this woman, discovered in 2008 at Valencina, Spain, reveals that she was a leading social figure at a time where no male attained a remotely comparable social position. Only other women, buried a short time after in the Montelirio tholos, part of the same burial area, appear to have enjoyed a similarly high social position. Our results invite to reconsider established interpretations about the political role of women at the onset of early social complexity, while at the same time questions traditionally-held views of the past and naïve assumptions concerning the determination of sex and gender through grave goods alone. Furthermore, this study anticipates the profound changes that newly-developed scientific methods may bring to prehistoric archaeology and the study of human social evolution.

2023-07-06 | PXD038664 | Pride

Transcriptional profiling of wild-type vs Perp-null mice during tooth development

Project description:Little is known about the role of cell-cell adhesion in the development of mineralized tissues. Here we report that PERP, a tetraspan membrane protein essential for epithelial integrity, is a critical regulator of enamel formation. Perp is necessary for proper cell attachment and gene expression during tooth development, and its expression is controlled by P63, a master regulator of stratified epithelial development. During enamel formation, PERP is localized to the interface between the enamel-producing ameloblasts and the stratum intermedium (SI), a layer of cells subjacent to the ameloblasts. Perp-null mice display dramatic enamel defects, which are caused, in part, by the detachment of ameloblasts from the SI. Microarray analysis comparing gene expression in teeth of wild-type and Perp-null mice identified several differentially expressed genes during enamel formation. Analysis of these genes in ameloblast-derived LS8 cells upon knock down of PERP confirmed the role for PERP in the regulation of gene expression. Together, our data show that PERP is necessary for the integrity of the ameloblast-SI interface and that the lack of Perp causes downregulation of genes that are critical for proper enamel formation. Two-condition experiment, RNA isolated from WT vs. Perp-null lower 1st molars. Biological replicates: 3 control replicates, 3 mutant replicates.

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