drosophila developmental stages

Here is a very precise and useful decription of every developmental stage from embryos to pupae.

Tension on Cadherin induce Polarity

A new paper out in DevCell showing that tension on Cadherin via intermediate filament (for once not actin), is enforcing polarity; by pulling in the back, the cells will respond my migrating the other direction. In other words (and not shown in the paper), in a wound site, the leading edge cells are polarised towards the wound by being pulled (via cadherin) from the cells behind it. A "mechanoresponse" that will induce migration to close the wound.

Drawing is taken from Dev Cell

analysis of hemocyte behavior ex-vivo

will is on top

comment about the c.elegans paper on calcium at wounds and future perspectives...

Yet another Banerjee cell paper

Brilliant Cell paper from Banerjee showing the signaling pathways and feedback loops in the lymph gland. Particularly, how the posterior signaling center signal to the medullary zone and the cortical zone, and the feedback mechanism to maintain  progenitor  cell  quiescence. Really nice piece showing the strength of using the lymph gland to study stem cell niche.