Radiation therapy is commonly used in the treatment of cancer in order to damage the DNA of
tumour cells, to inhibit proliferation and induce apoptosis. The main side effect of using radiation
therapy is DNA damage to the surrounding healthy tissues. Hence, protection of non-cancerous
tissues against radiation is vital for reducing the side effects [93].
Many of the recent cytoprotective agents capable of protecting normal tissues against
radiation-damage have some undesirable and serious side effects that limit their therapeutic
applications [94]. However, G. lucidum has been proven to exhibit radio-protective effects in
normal cells and enhance the recovery of cellular immune-competence from gamma–irradiation
[95, 96].
Chen et al. (1995) studied the effect of G. lucidum in repairing the radiation-induced damage
in a subset of T-lymphocytes in the spleen of gamma-irradiated mice [97]. The mice were treated
with whole body exposure to gamma-irradiation followed by administration of 400 mg/day/kg
body weight of G. lucidum [97]. This was compared to the control, radiation-treated only mice,
as well as radiation-treated mice administered with Krestin, a polysaccharide isolated from the
basidomycetes of Coriolus versicolor. Results showed that after 28 days, irradiated mice treated
with G. lucidum had the highest relative thymus weight with a greater number of CD4 and CD8
splenocytes and an increase in leukocyte counts. This showed that G. lucidum is effective (even
more so than Coriolus versicolor extracts) in enhancing the recovery of cellular
immunocompetence from gamma–irradiation
Radiation therapy is commonly used in the treatment of cancer in order to damage the DNA oftumour cells, to inhibit proliferation and induce apoptosis. The main side effect of using radiationtherapy is DNA damage to the surrounding healthy tissues. Hence, protection of non-canceroustissues against radiation is vital for reducing the side effects [93].Many of the recent cytoprotective agents capable of protecting normal tissues againstradiation-damage have some undesirable and serious side effects that limit their therapeuticapplications [94]. However, G. lucidum has been proven to exhibit radio-protective effects innormal cells and enhance the recovery of cellular immune-competence from gamma–irradiation[95, 96].Chen et al. (1995) studied the effect of G. lucidum in repairing the radiation-induced damagein a subset of T-lymphocytes in the spleen of gamma-irradiated mice [97]. The mice were treatedwith whole body exposure to gamma-irradiation followed by administration of 400 mg/day/kgbody weight of G. lucidum [97]. This was compared to the control, radiation-treated only mice,as well as radiation-treated mice administered with Krestin, a polysaccharide isolated from thebasidomycetes of Coriolus versicolor. Results showed that after 28 days, irradiated mice treatedwith G. lucidum had the highest relative thymus weight with a greater number of CD4 and CD8splenocytes and an increase in leukocyte counts. This showed that G. lucidum is effective (evenmore so than Coriolus versicolor extracts) in enhancing the recovery of cellularimmunocompetence from gamma–irradiation
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