To aid in distinguishing embryonic cells (or the nuclei released when cells were sheared) from the nurse cells that are present in eggs and embryos at all stages through to hatching, macerated cells were stained with a 2.5 [[micro]gram]/ml solution of DAPI (4,6 diamidino-2-phenylindole-2HCI; Accurate Scientific and Chemical Corp.) in 10mM Mg[Cl.sub.2]/McIlvaine buffer (18 mM citric acid, 164 mM [Na.sub.2][PO.sub.4], pH 7.0) for 30 min and rinsed in 10 mM Mg[Cl.sub.2]/McIlvaine buffer.
Stem cells located in the ectoderm, whose only differentiation products are oocytes and nurse cells, continuously enter the gamete differentiation pathway.
Thymic nurse cells - Ia-bearing epithelium involved in T-lymphocyte differentiation?
Thymic nurse cells participate in heterotypic internalization and repertoire selection of immature thymocytes; their removal from the thymus of autoimmune animals may be important to disease etiology.
These jumping genes then use nurse cells
to produce invasive material (copies of themselves called virus-like particles) that move into a nearby egg and then mobilize into the egg's DNA.
Thymic nurse cells
provide microenvi-ronment for secondary T cell receptor a rearrangement in cortical thymocytes.
javanus vitellarium, nurse cells
were disposed at the top of the oocyte, all being surrounded by a sheath composed of follicular cells (Figure 4(b)).
VEGF is mainly expressed in placental syncytiotrophoblast and invasive chorionic trophoblast cells during pregnancy especially at the vascular bud site at early pregnancy during which syncytiotrophoblast cells were strongly positive.20The decrease in VEGF level in the peripheral blood of PIH patients suggests that VEGF affects the differentiation and proliferation of nurse cells
causes invasive functional disorder of nurse cells
and affects the physiological changes of spiral arterioles.
In this ovary type, once the mitotic proliferation phase of the secondary oogonia or cytoblast is over, one cell of the resulting clone differentiates into the oocyte while the other cells remain as nurse cells
, or trophocytes.
It is noteworthy that many nurse cells
burst (apoptosis?) in the excurrent aquiferous canals, releasing their cytoplasmic compounds and symbionts into the seawater.
With the new gene, the germ cells developed eggs and nurse cells
. As the nurse cells
made exu, they also made fluorescing protein, lighting up this exu, the researchers report in the June 2 NATURE.
The nasal tissue acts like "nurse cells
", providing growth factor hormone to nerve cells, enabling them to make "meaningful connections".