Assessing tooth wear progression in non-human primates: a longitudinal study using intraoral scanning technology.

Intraoral scanners are widely used in a clinical setting for orthodontic treatments and tooth restorations, and are also useful for assessing dental wear and pathology progression. In this study, we assess the utility of using an intraoral scanner and associated software for quantifying dental tissue loss in non-human primates. An upper and lower second molar for 31 captive hamadryas baboons (Papio hamadryas) were assessed for dental tissue loss progression, giving a total sample of 62 teeth. The animals are part of the Southwest National Primate Research Center and were all fed the same monkey-chow diet over their lifetimes. Two molds of each dentition were taken at either two- or three-year intervals, and the associated casts scanned using an intraoral scanner (Medit i700). Tissue loss was calculated in WearCompare by superimposition of the two scans followed by subtraction analysis. Four individuals had dental caries, and were assessed separately. The results demonstrate the reliability of these techniques in capturing tissue loss data, evidenced by the alignment consistency between scans, lack of erroneous tissue gain between scans, and uniformity of tissue loss patterns among individuals (e.g., functional cusps showing the highest degree of wear). The average loss per mm2 per year for all samples combined was 0.05 mm3 (0.04 mm3 for females and 0.08 mm3 for males). There was no significant difference in wear progression between upper and lower molars. Substantial variation in the amount of tissue loss among individuals was found, despite their uniform diet. These findings foster multiple avenues for future research, including the exploration of wear progression across dental crowns and arcades, correlation between different types of tissue loss (e.g., attrition, erosion, fractures, caries), interplay between tissue loss and microwear/topographic analysis, and the genetic underpinnings of tissue loss variation.

Efecto del soporte social en la salud mental de trabajadores inmigrantes: una revisión sistemática / Effect of social support on migrant workers' mental health: a systematic review

Introducción: Los trabajadores inmigrantes son una población especialmente vulnerable a desarrollar trastornos de la esfera psicosocial, en probable relación con las diferencias que este grupo de trabajadores presenta: barrera idiomática, dificultad para acceder al sistema, desconocimiento de recursos disponibles, falta y/o ausencia de una red de apoyo social estable y segura. Objetivo: Conocer la incidencia de trastornos psicosociales en trabajadores inmigrantes y la influencia del apoyo sociosanitario en el desarrollo o aparición de los mismos. Material y Métodos: Revisión de Revisiones Sistemáticas con búsqueda en Medline (Pubmed), Embase, Cochrane, Google Académico y Journal of Inmigrant and Minority Health. Se incluyeron revisiones sistemáticas publicadas entre 2003 y diciembre de 2021, en inglés y español. Se empleó AMSTAR2 para evaluar la calidad de los estudios incluidos. Resultados: Se incluyeron tres revisiones sistemáticas, de calidad intermedia. Los estudios mostraban que los trabajadores inmigrantes, presenta más riesgo de desarrollar depresión y hay una prevalencia mayor de ésta, debido a diversos factores como falta de apoyo social y familiar, la incertidumbre o el tipo de trabajo que desarrollan. En cuanto a ansiedad, también se vio un aumento del riesgo y la prevalencia en trabajadores inmigrantes, debido a los mismos factores. Conclusión: Es necesario desarrollar estrategias de prevención para la protección de la salud mental de los trabajadores inmigrantes, ya que por sus característica presentan un mayor riesgo psicosocial con aumento de prevalencia de enfermedades como depresión y ansiedad. Es importante conocer las características de los trabajadores, con el fin de poder emplear los recursos preventivos más acertados. (AU)

Introduction: Migrant workers are a special kind of group with notable vulnerability to develop more psychosocial disorders compared to native workers, which may be due to several disadvantages such as language, culture shock, lack of social support or lack of access to health care between others. There are few studies on the health of immigrant groups at present, therefore, it is necessary and vital to explore and identify mental health situation and social support related factors or conditions. Objectives: To have knowledge of the incidence of psychosocial disorders in migrant workers and perceive the influence of social and health support in their development or appearance. Material and Methods: This is a review of Systematic Reviews by searching in Medline (Pubmed), Embase, Cochrane, Google Scholar and Journal of Immigrant and Minority Health. Systematic reviews published between 2003 and December 2022 were included, both in English and Spanish. Results: Three systematic reviews, of intermediate quality according to the AMSTAR2 tool, were included. Regarding depression, they concluded that migrant workers, has a higher risk of developing depression due to some factors such as lack of social and family support, uncertainty, the type of work they develop, etc. Regarding anxiety, an increased risk and prevalence was also seen in migrant workers, also due to the same factors. Conclusion: Prevention strategies are required to protect migrant workers' mental health, as they are a remarkably vulnerable group with a higher psychosocial risk and an increased prevalence of diseases such as depression and anxiety. (AU)

Microscopic and virtual approaches to oral pathology: A case study from El Mirador Cave (Sierra de Atapuerca, Spain).

BACKGROUND: The analysis and diagnosis of ancient oral pathologies have been improved with the application of new techniques such as microscopy and scanning methods over the past few decades. However, the enhancement of the diagnosis implies a prior knowledge of the availability and suitability of such equipments. METHODS: In this work we examined 3D digital and scanning electron microscopy and two computed tomography systems (CBCT and microCT) in order to assess dental and oral disease of the individuals of a Chalcolithic collective burial from El Mirador cave (Sierra de Atapuerca, Spain). RESULTS AND CONCLUSIONS: 3D Digital microscopy and CBCT are excellent options to analyze dental pathologies as they are more frequently available, sample preparation is not required, easy to operate, offer excellent images and the possibility of measurements and 3D reconstructions.

Integrating buccal and occlusal dental microwear with isotope analyses for a complete paleodietary reconstruction of Holocene populations from Hungary.

Dietary reconstruction is used to make inferences about the subsistence strategies of ancient human populations, but it may also serve as a proxy to characterise their diverse cultural and technological manifestations. Dental microwear and stable isotope analyses have been shown to be successful techniques for paleodietary reconstruction of ancient populations but, despite yielding complementary dietary information, these techniques have rarely been combined within the same study. Here we present for the first time a comprehensive approach to interpreting ancient lifeways through the results of buccal and occlusal microwear, and δ13C and δ15N isotope analyses applied to the same individuals of prehistoric populations of Hungary from the Middle Neolithic to the Late Bronze Age periods. This study aimed to (a) assess if the combination of techniques yields a more precise assessment of past dietary and subsistence practices, and (b) contribute to our understanding of the dietary patterns of the prehistoric Hungarian populations. Overall, no correlations between microwear and δ13C and δ15N isotope variables were observed, except for a relationship between nitrogen and the vertical and horizontal index. However, we found that diachronic differences are influenced by the variation within the period. Particularly, we found differences in microwear and isotope variables between Middle Neolithic sites, indicating that there were different dietary practices among those populations. Additionally, microwear results suggest no changes in the abrasiveness of the diet, neither food processing methods, despite higher C4 plant resource consumption shown by carbon isotopic signal. Thus, we demonstrate that the integration of dental microwear and carbon and nitrogen stable isotope methodologies can provide complementary information for making inferences about paleodietary habits.

Biocultural diversity in Late Pleistocene/Early Holocene Africa: Olduvai Hominid 1 (Tanzania) biological affinity and intentional body modification.

OBJECTIVES: The dentition of Olduvai Hominid 1 (OH1) exhibits an anomalous pattern of dental wear that was originally attributed to either intentional cultural modification (filing) or plant processing behaviors. A differential diagnosis of the wear and assessment of the biological affinity of OH1 is presented. MATERIALS AND METHODS: Macroscopic and microscopic observations of all labial and buccal tooth surfaces were undertaken to assess wear patterns. A multivariate analysis of mandibular morphology of OH1 compared to other Late Pleistocene, Holocene, and recent modern humans was used to ascertain biological affinity. RESULTS: The morphological variation of the OH1 mandible is closely aligned with variation in penecontemporaneous fossils from Africa and outside that of recent humans. The concave wear facets exposing dentin on the labial surfaces of all three preserved mandibular incisors is confirmed. Substantial loss of labial/buccal surfaces was documented on the surfaces of all in situ maxillary and mandibular canines, premolars, and molars ranging from distinct facets with well-defined edges, to blunting or "polishing" around areas of maximum buccal curvature. The wear on both the anterior and postcanine teeth closely resemble that caused by adornments ("labrets") worn in lower-lip and buccal facial piercings known from bioarchaeological and ethnographic contexts. The wear pattern suggests that the OH1 wore three facial piercings-two buccal/lateral and a medial one in the lower lip. DISCUSSION: Our findings suggest that the expression of social identities through intentional body modification is more diverse than previously documented elsewhere in Africa during the Late Pleistocene (i.e., ablation) and Early Holocene (i.e., ablation, chipping, and filing).

The COOH-terminal domain of wild-type Cot regulates its stability and kinase specific activity.

Cot, initially identified as an oncogene in a truncated form, is a mitogen-activated protein kinase kinase kinase implicated in cellular activation and proliferation. Here, we show that this truncation of Cot results in a 10-fold increase in its overall kinase activity through two different mechanisms. Truncated Cot protein exhibits a lower turnover rate (half-life, 95 min) than wild-type Cot (half-life, 35 min). The degradation of wild-type and truncated Cot can be specifically inhibited by proteasome inhibitors in situ. The 20S proteasome also degrades wild-type Cot more efficiently than the truncated protein. Furthermore, the amino acid 435 to 457 region within the wild-type Cot COOH-terminal domain confers instability when transferred to the yellow fluorescent protein and targets this fusion protein to degradation via the proteasome. On the other hand, the kinase specific activity of wild-type Cot is 3.8-fold lower than that of truncated Cot, and it appears that the last 43 amino acids of the wild-type Cot COOH-terminal domain are those responsible for this inhibition of kinase activity. In conclusion, these data demonstrate that the oncogenic activity of truncated Cot is the result of its prolonged half-life and its higher kinase specific activity with respect to wild-type Cot.