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Roots and early routes of neuroendocrinology.
Cell Tissue Res
January 2025
Departamento de Anatomía e Histología Humana, Facultad de Medicina, Universidad de Salamanca, Salamanca, Spain.
Carl C. Speidel (1919) and Ernst Scharrer (1928) were privileged witnesses of the encounter between neurons and hormones, a biological phenomenon that had been occurring in nature during millions of years of evolution, as Berta Scharrer started to unfold since 1935 on. The story of neurosecretion is intimately associated to that of the hypothalamus, such a "marvellous region", as Wolfgang Bargmann (1975) called it.
View Article and Find Full Text PDFGenetic adaptations to potato starch digestion in the Peruvian Andes.
Am J Biol Anthropol
January 2023
Department of Anthropology, University of California, Los Angeles, California, USA.
Objectives: Potatoes are an important staple crop across the world and particularly in the Andes, where they were cultivated as early as 10,000 years ago. Ancient Andean populations that relied upon this high-starch food to survive could possess genetic adaptation(s) to digest potato starch more efficiently. Here, we analyzed genomic data to identify whether this putative adaptation is still present in their modern-day descendants, namely Peruvians of Indigenous American ancestry.
View Article and Find Full Text PDFDistribution of early-branching Cyanobacteriia and the potential habitats that gave rise to the earliest oxygenic phototrophs.
mSphere
January 2025
Department of Computer Science and Engineering, Michigan State University, East Lansing, Michigan, USA.
The evolution of oxygenic photosynthesis in the Cyanobacteria was one of the most transformative events in Earth history, eventually leading to the oxygenation of Earth's atmosphere. However, it is difficult to understand how the earliest Cyanobacteria functioned or evolved on early Earth in part because we do not understand their ecology, including the environments in which they lived. Here, we use a cutting-edge bioinformatics tool to survey nearly 500,000 metagenomes for relatives of the taxa that likely bookended the evolution of oxygenic photosynthesis to identify the modern environments in which these organisms live.
View Article and Find Full Text PDFA Case of Latent Syphilis in Early Pregnancy: An Incidental Finding at Seven Weeks Gestation.
Cureus
December 2024
Internal Medicine, Thumbay University Hospital, Ajman, ARE.
, the bacteria that causes syphilis, is typically acquired through sexual contact but can also be transmitted transplacentally (through the placenta), causing congenital infection. Syphilis in pregnancy is a major contributing factor to perinatal morbidity and mortality. Untreated neonates may develop complications affecting the central nervous system, bones, joints, teeth, eyes, and skin.
View Article and Find Full Text PDFThe Ronne Ice Shelf survived the last interglacial.
Nature
January 2025
Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand.
The fate of the West Antarctic Ice Sheet (WAIS) is the largest cause of uncertainty in long-term sea-level projections. In the last interglacial (LIG) around 125,000 years ago, data suggest that sea level was several metres higher than today, and required a significant contribution from Antarctic ice loss, with WAIS usually implicated. Antarctica and the Southern Ocean were warmer than today, by amounts comparable to those expected by 2100 under moderate to high future warming scenarios.
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