scholarly journals Membrane cofactor protein (CD46) of complement. Processing differences related to alternatively spliced cytoplasmic domains.

1994 ◽  
Vol 269 (14) ◽  
pp. 10776-10779
Author(s):  
M.K. Liszewski ◽  
I. Tedja ◽  
J.P. Atkinson
1991 ◽  
Vol 174 (1) ◽  
pp. 35-44 ◽  
Author(s):  
D M Lublin ◽  
K E Coyne

Decay-accelerating factor (DAF) is a glycosyl-phosphatidylinositol (GPI)-anchored membrane protein that protects cells from complement-mediated damage by regulation of the C3 convertase. To investigate the role of the GPI anchor in the function of DAF, the cDNA encoding human DAF was expressed by transfection in Chinese hamster ovary (CHO) cells. Testing of these DAF transfectants in an antibody plus human complement-mediated cytotoxicity assay demonstrated that DAF protects these cells from cytotoxicity, and that the level of protection increases with expression of surface DAF. A cDNA construct encoding a transmembrane version of DAF (DAF-TM) protects CHO transfectants from cytotoxicity with equal efficiency to DAF. This DAF-TM construct used the TM and cytoplasmic domains of membrane cofactor protein (MCP); an alternate TM version of DAF constructed with the TM and cytoplasmic domains of HLA-B44 showed equivalent protection. The protection from cytotoxicity involved a decrease in the deposition of C3 on the cell, consistent with the effect of DAF on the C3 convertase. A second pair of anchor variants, MCP and a GPI-anchored construct, MCP-PI, were also equivalent in their complement protection. The equivalent function of GPI-anchored and TM versions of a protein was not expected based on the hypothesized increased lateral mobility of GPI-anchored proteins, which should confer a functional advantage in contacting ligand, in this case, C3b or C4b, on the cell surface. These data suggest either that GPI-anchored and TM versions of a protein have equal lateral mobility in the membrane, or else that increased lateral mobility is not advantageous to DAF or MCP in carrying out their complement inhibitory roles. Furthermore, DAF and MCP demonstrated approximately equal protection of cells from complement-mediated cytotoxicity, suggesting that DAF and MCP provide overlapping levels of protection to cells against damage mediated by the complement system.


2002 ◽  
Vol 278 (9) ◽  
pp. 7390-7396 ◽  
Author(s):  
Guido Hermey ◽  
Sady J. Keat ◽  
Peder Madsen ◽  
Christian Jacobsen ◽  
Claus M. Petersen ◽  
...  

2020 ◽  
Vol 29 (2) ◽  
pp. 586-596 ◽  
Author(s):  
Kaitlyn A. Clarke ◽  
Diane L. Williams

Purpose The aim of this research study was to examine common practices of speech-language pathologists (SLPs) who work with children with autism spectrum disorder (ASD) with respect to whether or not SLPs consider processing differences in ASD or the effects of input during their instruction. Method Following a qualitative research method, how SLPs instruct and present augmentative and alternative communication systems to individuals with ASD, their rationale for method selection, and their perception of the efficacy of selected interventions were probed. Semistructured interviews were conducted as part of an in-depth case report with content analysis. Results Based on completed interviews, 4 primary themes were identified: (a) instructional method , (b) input provided , (c) decision-making process , and (d) perceived efficacy of treatment . Additionally, one secondary theme, training and education received , was identified . Conclusions Clinicians reported making decisions based on the needs of the child; however, they also reported making decisions based on the diagnostic category that characterized the child (i.e., ASD). The use of modeling when teaching augmentative and alternative communication to individuals with ASD emerged as a theme, but variations in the method of modeling were noted. SLPs did not report regularly considering processing differences in ASD, nor did they consider the effects of input during instruction.


2014 ◽  
Vol 4 (1) ◽  
pp. 40-47
Author(s):  
Ismail Sulaiman

Fresh fish processing into a dried fish is a fish processing has been done a long time, the processing of fish based traditional food processing becomes important to preserve cultural heritage in fish processing. Differences drying method in the processing can affect the taste and texture of the fish produced timber. Types of tuna used significantly different to the color produced on the dried fish . The water content produced in this study is 15:57 (w/w %), ash content 1 , 58 ( % ), mean organoleptic test (color: 3.3, taste and smell 3:35, aroma : 3:34). Preferred types of fish are tuna and the most preferred method oven method.Keyword : 


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