By Richard Milner
Ever considering their discovery greater than one hundred fifty years in the past, astrocytes have proved to be anything of an enigma. in basic terms within the final 10-15 years has it turn into transparent that astrocytes are multifunctional flexible cells that play key roles in a large number of various tactics within the CNS, together with iteration of neural stem cells, synaptogenesis, and rules of the blood-brain barrier and neurovascular unit. Astrocytes: equipment and Protocols offers scientists with a entire consultant to many suggestions used for astrocyte mobilephone tradition, in addition to extra really expert methods for learning astrocyte services, either in vitro and in vivo. Key mobile, molecular and biochemical techniques are used to check the various and sundry capabilities of this interesting cell. Written within the hugely profitable tools in Molecular Biology™ sequence layout, chapters comprise introductions to their respective subject matters, lists of the required fabrics and reagents, step by step, effectively reproducible laboratory protocols, and key tips about troubleshooting and averting identified pitfalls.
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Extra resources for Astrocytes: Methods and Protocols (Methods in Molecular Biology, v814)
Thus, single astrocytes contact and may control large sets of contiguous synapses as well as the vascular bed regulating blood flow to those synapses. This architecture places the astrocyte in a prime position to coordinate synaptic activity and blood flow, potentially independent of neuronal metabolic activity. The domain organization may also play a role in pathology. Studies examining gliosis have shown that the domain organization is lost in reactive astrocytes in several experimental models of epilepsy, but maintained in reactive astrocytes in a mouse model of Alzheimer disease (Fig.
Yellow line indicates border between layers I and II. (c) Process from a varicose projection astrocyte. GFAP, white. (d) Interlaminar astrocyte processes characterized by their tortuousity. GFAP, white. Scale: (a, b) 100 μm; (c, d) = 10 μm. Reproduced from (8). Compared to the rodent cortex, primates harbor two novel astrocyte subclasses: interlaminar astrocytes and varicose projection astrocytes(5, 8, 141–143) (Fig. 5). Varicose projection astrocytes which have hitherto been observed only in humans and chimpanzees are GFAP+ cells that reside in layers 5–6 (8).
See 50) have shown that a type of astrocytic cell, the MASC, may give rise to new neurons and glia following CNS injury. Until now the consensus of the neuroregeneration field has been that the astroglial scar and its cadre of ECM-expressing astrocytes provides a neurite-growth inhibitory environment (for review, see Refs. (7, 50, 51)). , their neurite growth would be limited while they are still proliferating. Because we have found that particular ECM substrate conditions can change the fate of neuronal precursor cells derived from embryonic stem cells (6), it is important to further explore the intrinsic and extrinsic determinants of neural phenotypy.