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Recovering the Angiogenic/angiostatic Balance in NNK-induced Lung Carcinoma Via 12 Weeks of Submaximal Swimming and Nanocapsule

Overview
Journal Toxicol Rep
Date 2022 Dec 15
PMID 36518398
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Abstract

Background: Carcinogen nitrosamine 4-(methyl-trosamino)-1-(3-pyridyl)-1-butanone (NNK) remarkably affects the actions of growth factors: EGFR, VEGFR-2, as well as the natural tumor suppressors: TGFβ-1 and TIMP-1. We propose that utilizing non-chemical interventions such as swimming and nanocapsule play role in controlling cancer progression through direct effects on tumor-inherent factors.

Material And Methods: Male rats were randomly placed into seven groups: Control (C), Solvent (S), (NNK), NNK+ (NNK+NS), NNK+Exercise (NNK+E), +Exercise (NS+E), NNK++Exercise (NNK+NS+E). The exercise program consisted of 12 weeks of submaximal swimming. NNK and NS groups received weekly doses of 12/5 mg/kg and 125 μg/kg of NNK and respectively. By the end of the protocol, the levels of VEGFR-2, and TIMP-1 were determined using immunohistochemistry method and EGFR, and TGFβ-1 levels were measured by RT-PCR assay.

Results: In comparison with control group, there was a significant increase in the levels of VEGFR-2 in NNK, NNK+E, NNK+NS, NS+E, and NNK+NS+E groups , also TGFβ-1 levels of NNK+E and NS+E groups significantly increased . While EGFR levels did not change remarkably , except in NNK group , TIMP-1 in NNK, NNK+E, NS+E, NNK+NS+E groups significantly decreased ().

Conclusion: We recommend 12 weeks of submaximal swimming and 125 μg/kg nanocapsule are safe interventions to recover the balance of selected angiogenic/ angiostatic markers and to control tumor initiation, growth, and metastasis in lung carcinoma induced by 12/5 mg/kg of NNK injection.

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