Abstract
Objective: To systematically review the literature on the ability of low-dose (LD)
and ultra-low-dose (ULD) toxin exposure to prevent and treat biological and chemical
threats.
Methods: Laboratory research articles on protection or treatment from LD or ULD exposure
for the 13 high-risk chemical and biological warfare threats were collected and systematically
evaluated for quantity and scientific quality using pre-defined methodological criteria.
Results: Over 2600 articles were screened. Only five studies met the inclusion criteria
examining stimulation and protective effects of LD- or ULD-exposures to the 13 pre-identified
biological and chemical agents. The quality evaluation (QE) of these studies was above
average with a mean QE score of 70.6% of maximum. Two articles of fair to good quality
reported both protective and treatment efficacy from exposure of animals or humans
to LD- and ULD-exposures to toxins of risk in biochemical warfare.
Conclusion: There is little research on agents of biological and chemical warfare
investigating the possible use of LD- and ULD-toxins for protection and treatment.
The existing literature is generally of good quality and indicates that rapid induction
of protective tolerance is a feasible but under-investigated approach to bioterrorist
or biowarfare defense. In our opinion, further research into the role of induced protection
with LD- and ULD-toxic agents is needed.
Keywords
hormesis - Low- or ultra-low dose level (exposure, response, stimulation, reverse
effect) - U-shaped response - bi-phasic effect - dose-dependent reverse effects -
hormoligosis - homeopathy - picopharmacology/nanopharmacology - toxicology, biological
warfare agents - chemical warfare agents