Demonstration of burst-promoting activity of recombinant human GM-CSF on circulating erythroid progenitors using an assay involving the delayed addition of erythropoietin

We demonstrate through the use of an in vitro assay involving the delayed addition of erythropoietin that human recombinant GM-CSF, cloned from a mature T cell line, Mo, clearly has burst-promoting activity (BPA) on peripheral blood erythroid progenitors at picomolar concentrations. Delay for up to 72 hours of the addition of erythropoietin to semi-solid methylcellulose cultures of concentrated peripheral blood progenitors minimizes or eliminates BPA-independent erythroid colony formation with little loss of BPA-dependent erythroid colony formation. This assay will prove useful in accurately detecting sources of BPA.     

Ermächtigung eines Krankenhausarztes für Anästhesieleistungen bei ambulanten Operationen, die von am Krankenhaus als Belegärzte tätigen niedergelassenen Verträgsärzten durchgeführt werden

Ohne Zusammenfassung     

A Bar Code and Radio-Frequency Identification System for Transfusion Safety

This presentation will describe a pilot study of radio-frequency (RF) identification tags ("chips") that was conducted in parallel with standard procedures for the collection and testing of Red Blood Cells (Greater Chesapeake and Potomac Region, American Red Cross Biomedical Services, Baltimore, MD) and transfusion (Georgetown University Hospital, Washington, DC). The purpose of the study was to evaluate whether multi-write RF chips could be attached to blood bags, programmed, and used to facilitate the collection of information from (1) a blood bag manufacturer to (2) a blood collection center and, subsequently, to (3) a hospital transfusion service.     

Zulassungsantrag auf “Vorrat”

Ohne Zusammenfassung     

脑内注射白细胞介素-1β对淋巴结细胞应激免疫抑制因子生成的影响

our previous work showed that a suppressive factor( a protein with largemolecular weight in serum was induced by restraint stress in mice and rats,which suppressed Con Ainduced lymphocyte proliferation.It was also found that the generation of serum suppressive factorwas under control of the central nervous system.Our further study showed thatintracerebroventricular(icv )injection of interleukin 1 receptor antagonist(IL-1Ra)antagonised thegeneration of serum suppressive factor induced by restraint stress and icv injection of interleukin-1β(IL-1β)increased the generation of the suppressive factor.Our experiment also showed that the serumsuppressive factor induced by restraint stress was first made in lymph tissue and then released intoblood.The present work was designed to investigate the role of IL-1 in the brain in generation of thesuppressive factor in lymph node in mice.Icv injection of IL-1β( 1 pg/mouse) was shown tosignificantly increase the generation of the suppressive factor in lymph node.Icv injection of IL-1Ra,however ,antagonised generation of the suppressive factor.In mice without restraint stress,both thesuppressive factor in serum and in lymph node were found to be induced in dose-dependent manner byicv injection of IL-1β.Taken together,these results suggest that IL-1β in brain played a veryimportant role in generation of the suppressive factor in lymph node.The positive correlation betweenthe suppressive action of lymph node and of serum added to the evidence that lymph tissue is probablythe source of the serum suppressive factor.