China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (12): 4854-4865.doi: 10.16431/j.cnki.1671-7236.2022.12.033

• Basic Veterinary Medicine • Previous Articles     Next Articles

Preparation and Preliminary Evaluation of Minocycline Hydrochloride Complex Temperature-sensitive Gel

WANG Tianyang1,2, MA Bei1,2, DING Ze1,2, DONG Tianzhen1,2, LIU Junfeng1,2   

  1. 1. Engineering Laboratory for Tarim Animal Diseases Diagnosis and Control ofXinjiang Production & Construction Corps, Alar 843300, China;
    2. Animal Science and Technology, Tarim University, Alar 843300, China
  • Received:2022-06-24 Online:2022-12-05 Published:2022-12-01

Abstract: 【Objective】 The aim of this experiment was to prepare a complexed temperature-sensitive gel capable of local delivery of minocycline hydrochloride.【Method】 Minocycline hydrochloride complexes formed with calcium ions were loaded into a temperature-sensitive gel formed by poloxamer 407 (P407) and poloxamer 188 (P188). Its temperature sensitivity, characterized structure, drug content, stability, in vitro release effect and antibacterial properties were then investigated.【Result】 The temperature-sensitive gel of minocycline hydrochloride complex was prepared [JP2]with the formula of minocycline 0.25 g, P407 8 g, P188 1.5 g, CaCl2 0.01 g, [JP]acetic acid adjusted to pH 4.0±0.2 and deionized water in 50 mL of gel, and the appearance of minocycline hydrochloride complex temperature-sensitive gel showed a light yellow clarified solution with uniform transparency.The temperature-sensitive performance was good (gelling occurred at 31 ℃), the grid of pores formed by the gel was dense and uniformly distributed, the average particle size was 11.5 nm and the zeta potential was -3.8 mA, and the in vitro release time was up to 48 h, which was significantly longer compared with that of the raw materials.In the antibacterial performance test, the concentration of minocycline hydrochloride complex was the same as that of the raw materials.In the antibacterial performance test, the inhibition ability of minocycline hydrochloride complex warming gel did not decrease, and the antibacterial time in vitro was longer compared with that of the raw materials, the inhibition effect was good.【Conclusion】 In this study, a temperature-sensitive gel of minocycline hydrochloride complex was successfully prepared.The simulated in vitro release test and in vitro inhibition curve showed that the gel could significantly prolong the drug action time and improve the drug utilization, providing a new way of drug delivery for the clinical use of minocycline hydrochloride.

Key words: temperature-sensitive gel; minocycline hydrochloride; ion-pairing complexation; antibacterial effect

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