Host Resistance and Immune Responses in Advanced Age

Genistein modulates immune responses and increases host resistance to B16F10 tumor in adult female B6C3F1 mice.

The isoflavone genistein (4,7,4'-trihydroxyisoflavone) is a phytoestrogen found in high levels in soy products that has been associated with decreased incidences of breast and prostate cancers. The potential effects of genistein on the immune system were evaluated in adult female B6C3F1 mice. Groups of mice were exposed to vehicle or genistein by gavage for 28 d. The doses of genistein used wer...

Age-Dependent Cellular Immune Responses

Immune responses to resistance exercise.

Resistance exercise induces changes in leukocyte redistribution, phenotypical surface expression and leukocyte functionality. Several factors have been shown to alter the temporal pattern and/or magnitude of response including manipulation of acute program variables, the aging process, and nutritional supplementation. Rest period length and load can modify the temporal pattern and/or magnitude ...

Host innate immune responses to sepsis

The immune response to sepsis can be seen as a pattern recognition receptor-mediated dysregulation of the immune system following pathogen invasion in which a careful balance between inflammatory and anti-inflammatory responses is vital. Invasive infection triggers both pro-inflammatory and anti-inflammatory host responses, the magnitude of which depends on multiple factors, including pathogen ...

How Some Mycoplasmas Evade Host Immune Responses

E ven though free-living, mycoplasmas depend on their hosts for key nutrients, including purines, pyrimidines, several amino acids, and sterols, which are incorporated into the membranes of these wall-less bacteria. These requirements reflect their relative genomic simplicity. The 580-kb genome of Mycoplasma genitalium, for example, is comparable in size to that of a large virus. Nonetheless, t...