Effect of periodontal disease on diabetes: systematic review of epidemiologic observational evidence

submitted by: WSB
Background: Periodontal disease and diabetes mellitus are common, chronic diseases worldwide. Epidemiologic and biologic evidence suggests periodontal disease may affect diabetes. Objective: To systematically review non-experimental, epidemiologic evidence for effects of periodontal disease on diabetes control, complications, and incidence. Data sources: Electronic bibliographic databases, supplemented by hand searches of recent and future issues of relevant journals. Study eligibility...
Authors: Wenche S. Borgnakke, Pekka V. Ylostalo, George W. Taylor, Robert R. Genco

The Origin of Vertebrates - Part 2: Telling the Back from the Front or What the Chordates Invented (27:47)

submitted by: video_collector

In Part 2: Telling the back from the front or what the chordates invented, Marc Kirschner (Harvard Medical School) discusses why we look like invertebrate animals turned upside down, i.e. vertebrates have their central nervous system on their backs and invertebrates have it on their bellies.

Role of the Neural Crest in Vertebrate Development and Evolution - Part 2: The Role of the Neural Crest in Head Development and in Vertebrate Evolution (30:04)

submitted by: video_collector
Nicole Le Douarin shares her research on the role of the neural crest in skeletal development. The Q/C (quail/chick) marker system revealed that apart from the peripheral nervous system (PNS), the melanocytes and some endocrine tissues, the NC plays a major role in the construction of the vertebrate head. The entire facial skeleton and part of the skull (frontal, squamosal, parietal bones) are of NC origin together with the connective tissues of the face and ventral part of the neck. The...