Hemolysins


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Related to Hemolysins: Leukocidins

Hemolysins

 

substances capable of liberating hemoglobin from red blood cells. Upon liberation by hemolysins, the hemoglobin dissolves in the plasma or surrounding fluid and the blood (or the suspension of red blood cells) becomes transparent (laked blood). Hemolysins are the products of the vital activities of many bacteria (for example, staphylococci and streptococci), parasitic worms, insects, scorpions, and some poisonous snakes (lysolecithins). Hemolysins may be present in the blood serum and lyse the body’s own red blood cells (autohemolysis). However, they generally appear after intravenous injection of red blood cells obtained from the same species of animal (isohemolysins) or from another species (heterolysins). The hemolytic properties of these serums, which depend upon the presence of complement (a thermolabile substance needed for the action of heterolysins upon red blood cells), are lost when they are heated to 56° C for 30 minutes.

KH. KH. PLANEL’ES

References in periodicals archive ?
The thermostability of most hemolysins has not been investigated.
To date, none of the hemolysins has been reported to have anti-fungal activity.
Information about growth inhibition of yeast by hemolysins is unavailable.
To the best of our knowledge, no bacterial hemolysins have been reported with anti-bacterial activity.
These results indicate that HMC-C can function as a hemolysin.
Hemolysin is a major part of the immediately effective, nonspecific, and natural defenses of most invertebrates against invading pathogens.
In summary, the current study showed that HMC-C displays an important immune function in hemolytic activity and presents similar characteristics as hemolysin.
Some of these mushroom hemolysins also exhibit potential anti-proliferative activity on several cancer cell lines in vitro, e.
A novel hemolysin was isolated from the edible mushroom Pleurotus nebrodensis by ion exchange and gel filtration chromatography on DEAE-Sepharose and Sephacryl S-100.
Keywords: Pleurotus nebrodensis hemolysin (nebrodeolysin); Cytotoxicity; Apoptosis; Anti-HIV-1 activity
In Passaic River enterococci [beta] hemolysin expression was very low with only 2.
Screening for enterocins and detection of hemolysin and vancomycin resistance in enterococci of different origins.