scholarly journals Reduced cellular immune response in social insect lineages

2016 ◽  
Vol 12 (3) ◽  
pp. 20150984 ◽  
Author(s):  
Margarita M. López-Uribe ◽  
Warren B. Sconiers ◽  
Steven D. Frank ◽  
Robert R. Dunn ◽  
David R. Tarpy

Social living poses challenges for individual fitness because of the increased risk of disease transmission among conspecifics. Despite this challenge, sociality is an evolutionarily successful lifestyle, occurring in the most abundant and diverse group of organisms on earth—the social insects. Two contrasting hypotheses predict the evolutionary consequences of sociality on immune systems. The social group hypothesis posits that sociality leads to stronger individual immune systems because of the higher risk of disease transmission in social species. By contrast, the relaxed selection hypothesis proposes that social species have evolved behavioural immune defences that lower disease risk within the group, resulting in lower immunity at the individual level. We tested these hypotheses by measuring the encapsulation response in 11 eusocial and non-eusocial insect lineages. We built phylogenetic mixed linear models to investigate the effect of behaviour, colony size and body size on cellular immune response. We found a significantly negative effect of colony size on encapsulation response (Markov chain Monte Carlo generalized linear mixed model (mcmcGLMM) p < 0.05; phylogenetic generalized least squares (PGLS) p < 0.05). Our findings suggest that insects living in large societies may rely more on behavioural mechanisms, such as hygienic behaviours, than on immune function to reduce the risk of disease transmission among nest-mates.

2019 ◽  
Vol 19 (1S) ◽  
pp. 215-217
Author(s):  
E V Markova ◽  
I A Goldina ◽  
B G Goldin ◽  
M A Knyazheva ◽  
I V Savkin

The purpose of this work was to study the effect of turmeric extract on behavior indicators, the severity of the cellular immune response in animals in a state of experimental alcoholism. Experimental models: mouse males (CBAxC57Bl/6)F1 three months of age (n = 60). Alcohol dependence in experimental animals was formed by the method of 6-month soldering with a 10% ethanol solution. In the control groups, the animals received per os water or 10% ethanol solution, in the experimental group - an extract of turmeric powder in a solution of ethanol. Mice behavior was assessed in the “open field” test. The severity of the cellular immune response to sheep erythrocytes was assessed by the intensity of the development of a delayed-type hypersensitivity reaction.It was found that the use of turmeric extract against the background of taking ethanol solution in animals with experimental alcoholism leads to the stimulation of behavior and the increase of the cellular immune response to the level characteristic of healthy animals of the corresponding age.Results indicates the protective effect of turmeric on a number of parameters of the functional activity of the nervous and immune systems during chronic ethanol intoxication.


1999 ◽  
Vol 37 (2) ◽  
pp. 123-129 ◽  
Author(s):  
B. R. Mignon ◽  
T. Leclipteux ◽  
CH. Focant ◽  
A. J. Nikkels ◽  
G. E. PIErard ◽  
...  

2004 ◽  
Vol 146 (4) ◽  
pp. 159-172 ◽  
Author(s):  
D. Müller-Doblies ◽  
S. Baumann ◽  
P. Grob ◽  
A. Hülsmeier ◽  
U. Müller-Doblies ◽  
...  

2005 ◽  
Vol 102 (Special_Supplement) ◽  
pp. 180-184 ◽  
Author(s):  
György T. Szeifert ◽  
Isabelle Salmon ◽  
Sandrine Rorive ◽  
Nicolas Massager ◽  
Daniel Devriendt ◽  
...  

Object. The aim of this study was to analyze the cellular immune response and histopathological changes in secondary brain tumors after gamma knife surgery (GKS). Methods. Two hundred ten patients with cerebral metastases underwent GKS. Seven patients underwent subsequent craniotomy for tumor removal between 1 and 33 months after GKS. Four of these patients had one tumor, two patients had two tumors, and one patient had three. Histological and immunohistochemical investigations were performed. In addition to routine H & E and Mallory trichrome staining, immunohistochemical reactions were conducted to characterize the phenotypic nature of the cell population contributing to the tissue immune response to neoplastic deposits after radiosurgery. Light microscopy revealed an intensive lymphocytic infiltration in the parenchyma and stroma of tumor samples obtained in patients in whom surgery was performed over 6 months after GKS. Contrary to this, extensive areas of tissue necrosis with either an absent or scanty lymphoid population were observed in the poorly controlled neoplastic specimens obtained in cases in which surgery was undertaken in patients less than 6 months after GKS. Immunohistochemical characterization demonstrated the predominance of CD3-positive T cells in the lymphoid infiltration. Conclusions. Histopathological findings of the present study are consistent with a cellular immune response of natural killer cells against metastatic brain tumors, presumably stimulated by the ionizing energy of focused radiation.


1990 ◽  
Vol 19 (3-4) ◽  
pp. 177-187
Author(s):  
Thomas P. McGraw ◽  
Benjamin R. Vowels ◽  
M. Eric Gershwin ◽  
Murray B. Gardner

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