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Effects of artemether on peripheral T, B, T mu and T gamma lymphocytes in beagle dog
Abstract:
The effects of intramuscular injection of Artemether on peripheral T, B, T mu and T gamma lymphocytes in beagle dogs was investigated cytochemically. Doses used were 6, 19, and 32 MKD, respectively. Results showed that after injection of Artemether for 15 successive days, the T, B, and T mu lymphocytes of the 19 and 32 MKD groups were markedly reduced and the T gamma lymphocytes of all 3 dosage groups were decreased to zero. 28 days after cessation of the drug, T, T mu and T gamma lymphocytes had recovered to control levels, while the B lymphocytes of the 19 and 32 MKD groups remained markedly lower than those of the control groups. The differences and similarities of the effects on the peripheral T, B, T mu and T gamma lymphocytes produced by the 3 dosages of Artemether and the relationship between the changes of T, B lymphocytes and immunological function of beagle dogs are discussed.
Insights
Artemether treatment in beagle dogs significantly reduced T, B, and T mu lymphocytes, with T gamma lymphocytes dropping to zero across all doses. While most lymphocyte populations recovered, B cell counts remained low in higher dose groups post-treatment.
Area of Science:
- Immunology
- Pharmacology
- Veterinary Medicine
Background:
- Artemether is an antimalarial drug with potential immunomodulatory effects.
- Understanding its impact on lymphocyte populations is crucial for assessing safety and efficacy.
Purpose of the Study:
- To investigate the cytochemical effects of intramuscular Artemether on peripheral T, B, T mu, and T gamma lymphocytes in beagle dogs.
- To evaluate dose-dependent effects and recovery patterns of lymphocyte subsets after Artemether administration.
Main Methods:
- Beagle dogs received intramuscular injections of Artemether at 6, 19, and 32 MKD for 15 consecutive days.
- Peripheral blood lymphocytes were analyzed cytochemically to assess T, B, T mu, and T gamma cell populations.
- Lymphocyte counts were monitored during treatment and after a 28-day cessation period.
Main Results:
- Artemether administration led to a marked reduction in T, B, and T mu lymphocytes at 19 and 32 MKD.
- T gamma lymphocytes decreased to zero in all three dosage groups.
- Following drug cessation, T, T mu, and T gamma lymphocytes recovered to control levels within 28 days.
- B lymphocyte counts in the 19 and 32 MKD groups remained significantly lower than controls post-treatment.
Conclusions:
- Intramuscular Artemether exerts dose-dependent immunomodulatory effects on peripheral lymphocytes in beagle dogs.
- While transient reductions were observed, sustained B lymphocyte depletion at higher doses warrants further investigation regarding long-term immunological function.
- The study highlights the need to consider potential impacts on the immune system when using Artemether.