Do neither Notch1 expression nor cellular size correlate with mesenchymal stem cell properties of adult articular chondrocytes?
Cellular size or Notch1 expression is not per se a specific marker for mesenchymal progenitor cells in adult articular cartilage. Monolayer-expanded adult chondrocytes contain a larger mesenchymal progenitor cell-like population than directly isolated cells, highly likely as a result of dedifferentiation. If there are resident Notch1-positive cells or cells of a specific size in adult articular cartilage with functional features of progenitor cells, the population consists of only a very small number of cells.
Recently, the number of HIV-infected patients with polypharmacy has been higher, increasing the risk of nonadherence. Furthermore, previous treatment with antiretroviral therapy, HIV transmission by intravenous drug use, and high risk of drug-related problems are also associated with lower adherence.