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Unity and diversity of responses to xenobiotics in organisms
P Kakkar1, F N Jaffery, P N Viswanathan
1Ecotoxicology Section, Industrial Toxicology Research Centre, Lucknow, India.
Abstract:
A conceptual treatment of the mechanisms involved in the process of toxicosis by diverse agents in different tissues indicate a likely unspecific, common, central process in addition to specific precipitating factors acting on a particular site in a cascade of events. Free radicals, membrane functions and calcium functions appear to be links in the common pathway. Such a central mechanism could be interrelated with immunological defenses as well as genotoxic changes at different sites, suggesting parallel or related evolution of these antistress mechanisms. Many radical scavengers, antioxidants, membrane stabilizers, nutritional supplements and calcium modulators have proved beneficial either in reducing toxic impact, delaying the development of lesions or even reversing the effects. Similarly, recent evidences show that some immunomodulators can act as antioxidants and antigenotoxicants. Thus, the status of body defenses which may vary from one individual to the other have a role in deciding the effects under the same quantified risks with varying relative responses. Whether modulation of physiological defenses against stress could help in developing prophylactic measures remains an open question.
Insights
Diverse toxic agents may share a common central mechanism involving free radicals, membrane, and calcium functions. Enhancing body defenses like antioxidants and immunomodulators may mitigate toxicosis effects.
Area of Science:
- Toxicology and cellular stress response.
- Biochemistry and molecular mechanisms of toxicity.
Background:
- Toxicosis from diverse agents often involves specific factors and a common, unspecific central process.
- Free radicals, membrane, and calcium functions are implicated as key links in this common pathway.
Purpose of the Study:
- To conceptually explore the unifying mechanisms underlying toxicosis induced by various agents.
- To investigate the interplay between central toxic pathways, immunological defenses, and genotoxic changes.
Main Methods:
- Conceptual analysis of existing literature on toxicosis mechanisms.
- Review of studies on radical scavengers, antioxidants, membrane stabilizers, and calcium modulators.
- Examination of evidence linking immunomodulators to antioxidant and antigenotoxic activities.
Main Results:
- A common central pathway for toxicosis is proposed, involving free radicals, membrane, and calcium homeostasis.
- This central mechanism may be interconnected with immunological defenses and genotoxic processes.
- Interventions like antioxidants and calcium modulators show promise in reducing toxic impact and lesions.
Conclusions:
- Individual variations in body defenses influence responses to toxicological risks.
- Immunomodulators may possess antioxidant and antigenotoxic properties, suggesting a role in broader antistress mechanisms.
- The potential for prophylactic measures through modulating physiological defenses against stress requires further investigation.