Anti-Candida, Anti-Enzyme Activity and Cytotoxicity of 3,5-Diaryl-4,5-dihydro-1H-pyrazole-1-carboximidamides
作者:Simone Oliveira、Lucas Pizzuti、Frank Quina、Alex Flores、Rafael Lund、Claiton Lencina、Bruna Pacheco、Claudio de Pereira、Evandro Piva
DOI:10.3390/molecules19055806
日期:——
Because of the need for more effective and less harmful antifungal therapies, and interest in the synthesis of new carboximidamides, the goal of this study was to determine the antifungal and anti-enzyme activities of some new pyrazole carboximidamides and their cytotoxicity. For this purpose, tests were performed to evaluate: minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC); production of proteinases and phospholipase, and cytotoxicity of the extracts. Data were analyzed by ANOVA and Tukey Tests (α = 5%). The results were: MIC and MFC ≥ 62.5 μg/mL (C. albicans, C. parapsilosis, C. famata, C. glabrata, and Rhodotorula mucillaginosa) and MIC and MFC ≥ 15.6 μg/mL (C. lipolytica). The values of proteinase and phospholipase (Pz) of C. albicans before and after exposure to the compounds were: 0.6 (±0.024) and 0.2 (±0.022) and 0.9 (±0.074) and 0.3 (±0.04), respectively. These proteinase results were not significant (p = 0.69), but those of phospholipase were (p = 0.01), and 15.6 μg/mL was the most effective concentration. The cytotoxicity means were similar among the tests (p = 0.32). These compounds could be useful as templates for further development through modification or derivatization to design more potent antifungal agents. Data from this study provide evidence that these new pyrazole formulations could be an alternative source for the treatment of fungal infections caused by Candida. However, a specific study on the safety and efficacy of these in vivo and clinical trials is still needed, in order to evaluate the practical relevance of the in vitro results.
由于需要更有效、危害更小的抗真菌疗法,以及对合成新的羧酰胺类化合物的兴趣,本研究的目标是确定一些新的吡唑羧酰胺类化合物的抗真菌和抗酶活性及其细胞毒性。为此,对提取物的最低抑菌浓度(MIC)和最低杀菌浓度(MFC)、蛋白酶和磷脂酶的产生以及细胞毒性进行了测试评估。数据分析采用方差分析和 Tukey 检验(α = 5%)。结果如下MIC 和 MFC ≥ 62.5 μg/mL(白僵菌、副丝状芽孢杆菌、法马塔芽孢杆菌、格拉布拉塔芽孢杆菌和粘膜癣菌),MIC 和 MFC ≥ 15.6 μg/mL(脂溶性芽孢杆菌)。白僵菌在接触化合物前后的蛋白酶和磷脂酶(Pz)值分别为分别为 0.6(±0.024)和 0.2(±0.022),以及 0.9(±0.074)和 0.3(±0.04)。这些蛋白酶结果不显著(p = 0.69),但磷脂酶结果显著(p = 0.01),15.6 μg/mL 是最有效的浓度。各试验的细胞毒性平均值相似(p = 0.32)。这些化合物可以作为进一步开发的模板,通过修饰或衍生物化设计出更有效的抗真菌剂。这项研究的数据证明,这些新的吡唑制剂可以作为治疗由念珠菌引起的真菌感染的替代药物。不过,仍需对这些体内和临床试验的安全性和有效性进行具体研究,以评估体外试验结果的实际意义。