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Minocycline hydrochloride nanoliposomes inhibit the production of TNF-α in LPS-stimulated macrophages

Authors Liu D, Yang PS

Received 20 May 2012

Accepted for publication 21 June 2012

Published 31 August 2012 Volume 2012:7 Pages 4769—4775

DOI https://doi.org/10.2147/IJN.S34036

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

D Liu, P S Yang

Shandong Provincial Key Laboratory of Oral Biomedicine, College of Stomatology, Shandong University, Shandong Province, People's Republic of China

Background: As an adjunctive treatment of chronic periodontitis, it seems that the application of periocline or the other antimicrobials is effective against periodontopathogens. In this study, nanoliposomes were investigated as carriers of minocycline hydrochloride and the inhibition effects of minocycline hydrochloride nanoliposomes on the proliferation and lipopolysaccharide (LPS)-stimulated production of tumor necrosis factor-α (TNF-α) of macrophages were elucidated.
Methods: After stimulation with 10 µg/mL LPS, murine macrophages (ANA-1) were treated with 10, 20, 40, 50 and 70 µg/mL 2% minocycline hydrochloride nanoliposomes, minocycline hydrochloride solution, and periocline for 6, 12, 24, 48 and 60 hours, respectively. A tetrazolium (MTT) assay was used to evaluate macrophages cell proliferation rate and the levels of TNF-α mRNA were measured by SYBR Green Real Time PCR.
Results: Ten to 70 µg/mL 2% minocycline hydrochloride nanoliposomes, minocycline hydrochloride solution, and periocline showed dose- and time-dependent inhibition of ANA-1 proliferation. Minocycline hydrochloride nanoliposomes showed dose- and ratio-dependent inhibition of LPS-stimulated TNF-α secretion of ANA-1. The inhibition effect of 10 µg/mL minocycline hydrochloride nanoliposomes was significantly better than that of two positive control groups, and equated to that of 60 or 70 µg/mL periocline. The expression of TNF-α mRNA in experimental group continued to reduce linearly with time.
Conclusion: All three preparations of minocycline hydrochloride showed dose- and time-dependent inhibition of proliferation of ANA-1. Minocycline hydrochloride nanoliposomes have stronger and longer inhibition effect on LPS-stimulated TNF-α secretion of macrophages cell than minocycline hydrochloride solution and periocline.

Keywords: minocycline hydrochloride, nanoliposomes, periodontitis, lipopolysaccharide, macrophages, tumor necrosis factor-α

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