As we accumulate more and more data on adult neurogenesis in rodents I keep asking myself what kind of impact these new cells could have. The dearth of literature on primate and human adult neurogenesis seems to make these questions all the more relevant. As a starting point, I created a Pubmed collection of all the studies of adult hippocampal neurogenesis in humans. They’re also listed below in a Google spreadsheet. Note that human studies often do not directly measure neurogenesis but instead measure 1) cell proliferation (which usually correlates with neurogenesis in rodents, but assumes that proliferation results in surviving neurons in humans), 2) stem cell markers (such as nestin, which correlates with neurogenesis only if they indeed divide and produce new neurons), 3) immature neurons (which, technically speaking, is neurogenesis, but whether these neurons mature and become functional remains to be determined), or 4) other factors that correlate with neurogenesis, such as blood flow or stem cell biomarkers. So, while the conclusions of these studies may be exciting (or depressing), they have to be taken with a grain of salt at this point.
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Information on neuro genesis is encouraginga,perhaps for Alzheimers,stroke and other problems affecting the brain. Thank you for this information. I am not a doctor or a scientist but have two family members with advanced Alzheimers. I am in favor of continuing studies of the brain and stem cell research.