Evaluating the Effects of Crystallinity on Drug Release Behaviour in Itraconazole- or Miconazole-Loaded PLGA Microparticles Prepared Using a Co-Grinding Method

This study aimed to prepare and characterize itraconazole (ITCZ)- or miconazole (MCZ)-loaded poly (lactide-co-glycolide) (PLGA) microparticles (MP) using a co-grinding method with ball milling, which is a solvent-free and convenient procedure. PLGA MP was prepared by grinding for 60 min, and the fixed theoretical drug loading was set at 9.1% and 16.7% for both drugs. The obtained loading efficiency for both drugs was estimated to be approximately 100%. The average diameters of the drug-loaded PLGA MP were approximately 20 - 35 μm. Powder X-ray diffraction (PXRD) or differential scanning calorimetry (DSC) confirmed amorphization of ITCZ and MCZ in ITCZ- or MCZ-loaded PLGA MP in all formulations. The drug release percentage from 9.1%-loaded ITCZ-PLGA7505 MP at 24 h was almost 50%, which was higher than that of ITCZ powder. The drug release percentage from MCZ-loaded PLGA7505 MP at 4 h was over 80%, which was higher than that of MCZ powder. This enhancement of release rate is caused by the amorphization of ITCZ or MCZ in the PLGA matrix. MCZ-loaded PLGA7510 MP showed a sustained release profile up to 24 h, suggesting that MCZ exists in an amorphous form in the PLGA matrix;however, the release rate declined owing to the large molecular weight of PLGA. Therefore, the release enhancement of antifungal drugs loaded on PLGA MP could be achieved by their amorphization using a co-grinding method with ball milling.

Pharmacokinetics/Pharmacodynamics study of Fixtral SB as compared to supra bioavailable itraconazole and conventional itraconazole

BACKGROUND Itraconazole is a broad-spectrum triazole antifungal inhibiting fungal growth by inhibiting ergosterol synthesis and exhibits a nonlinear pharmacokinetic profile.Erratic absorption pattern with wide fluctuations in blood levels causes inconsistent and unpredictable clinical behaviour of this drug despite its low minimum inhibitory concentration(MIC)as compared to other antifungal agents.AIM To compare the oral bioavailability and bioequivalence of Fixtral SB(supra bioavailable itraconazole)with reference product R2(supra bioavailable 2×50 mg itraconazole).METHODS The study population consisted of 54 healthy volunteers,aged between 18-45 years and randomized to receive a single oral dose of either test[T;Fixtral SB(supra bioavailable itraconazole)100 mg]or reference product(R1;Sporanox 100 mg×2 capsules and R2;Lozanoc capsules 50 mg×2 capsules).Blood samples were taken pre-dose and post-dose up to 96 h.The study evaluated bioequivalence by comparing the oral bioavailability of the test product with reference product R2.The pharmacodynamic characteristics of the drug were evaluated by comparing the test product with reference product R1.Pharmacokinetics(PK)-PD comparative analysis[area under the concentration-time curve(AUC)/minimum inhibitory concentration(MIC)>25]was performed for conventional itraconazole 100 mg and supra bioavailable itraconazole 50 mg.Adverse events(AEs)assessments were performed in each study period and post-study evaluation.RESULTS Statistical analysis of primary PK variables revealed bioequivalence,with confidence intervals being completely inside the acceptance criteria of 80%-125%.The peak concentration levels of itraconazole were achieved at 10 h(T)and 8.5 h(R2),respectively.Pharmacodynamic parameter assessment showed that AUC/MIC for R1 are comparable to Fixtral SB 100mg for MIC levels up to 16mcg/mL(P>0.05 and observed P=0.3196).Six AEs were observed that were mild to moderate in severity and resolved.No severe AE was reported.CONCLUSION Test product itraconazole Capsule 100 mg is bioequivalent with the reference product(R2)at 100 mg dose(2 capsules of Lozanoc®50 mg)under fed conditions.Pharmacodynamics activity in terms of AUC/MIC is comparable between the test product at 100 mg dose and marketed itraconazole 200 mg.Fixtral SB is expected to have therapeutically similar efficacy at half the equivalent dose.Tested formulations were found to be safe and well tolerated.

Unraveling the Stray Current-Induced Interfacial Transition Zone(ITZ)Effect on Sulfate Corrosion in Concrete

The rail transit in sulfate-rich areas faces the combined effects of stray current and salt corrosion;however,the sulfate ion transport and concrete degradation mechanisms under such conditions are still unclear.To address this issue,novel sulfate transport and mesoscale splitting tests were designed,with a focus on considering the differences between the interfacial transition zone(ITZ)and cement matrix.Under the influence of stray current,the ITZ played a pivotal role in regulating the transport and mechanical failure processes of sulfate attack,while the tortuous and blocking effects of aggregates almost disappeared.This phenomenon was termed the“stray current-induced ITZ effect.”The experimental data revealed that the difference in sulfate ion transport attributed to the ITZ ranged from 1.90 to 2.31 times,while the difference in splitting strength ranged from 1.56 to 1.64 times.Through the real-time synchronization of splitting experiments and microsecond-responsive particle image velocimetry(PIV)technology,the mechanical properties were exposed to the consequences of the stray currentinduced ITZ effect.The number of splitting cracks in the concrete increased,rather than along the central axis,which was significantly different from the conditions without stray current and the ideal Brazilian disk test.Furthermore,a sulfate ion mass transfer model that incorporates reactivity and electrodiffusion was meticulously constructed.The embedded finite element calculation exhibited excellent agreement with the experimental results,indicating its reliability and accuracy.Additionally,the stress field was determined utilizing analytical methods,and the mechanism underlying crack propagation was successfully obtained.Compared to the cement matrix,a stray current led to more sulfates,more microstructure degradation,and greater increases in thickness and porosity in the ITZ,which was considered to be the essence of the stray current-induced ITZ effect.

基于纳米压痕试验的沥青混合料ITZ识别及力学性能

采用纳米压痕试验研究了2种沥青混合料的界面过渡区(ITZ),并基于微观断裂韧度指标评价了ITZ的力学特性.结果表明:玄武岩沥青混合料ITZ的厚度为6~12μm,石灰岩沥青混合料ITZ的厚度为10~18μm;ITZ的力学特性与集料更为接近,沥青混合料抗开裂性能和稳定性受沥青与集料的共同影响,ITZ的断裂韧度越大,沥青混合料的抗开裂性能越好;裂缝容易在ITZ和沥青胶浆的交界处展开,特别是沥青混合料更容易在ITZ和沥青胶浆的交界处发生脆性断裂.

Metabonomic analysis of plasma biochemical changes in pyrexia rats after treatment with Gegenqinlian decoction,aspirin and itraconazole by UHPLC-FT-ICR-MS

A metabonomic approach involving an ultrahigh-performance liquid chromatography combined with Fourier transform ion cyclotron resonance mass spectrometry(UHPLC-FT-ICR-MS)was used to investigate the changes in the endogenous metabolites in the plasma of rats with yeast-induced pyrexia treated with Gegenqinlian decoction(GQLD),aspirin and itraconazole.The differences in the small molecule profiles of treatment using traditional Chinese medicine,etiological treatment and symptomatic treatment were elucidated.Thirty-six plasma metabolites were identified or putatively identified,and the effects of the three medicines on the thirty-six metabolites were studied.Their metabolic pathways indicated that GQLD,aspirin and itraconazole ameliorated the rats with yeast-induced pyrexia predominantly by regulating the metabolisms of phospholipid,sphingolipid,fatty acid oxidation,fatty acid amides,amino acid and glycerolipid in vivo.The pharmacodynamics and metabonomic results showed that the three medicines exhibited the therapeutic effects on pyrexia by regulating the perturbations of multiple metabolisms.The study provided a scientific basis for an in-depth understanding of the therapeutic effects of GQLD,aspirin and itraconazole on rats with yeast-induced pyrexia.

The Effect of Itraconazole on the Vaginal Candidiasis under Different Immunity Conditions in Mice

To study the effect of itraconazole on the vaginal candidiasis caused by Candida under different immunity conditions, the fungal vaginitis model was established in female ICR mice by intravaginal inoculation of suspension of C. albicans after the animal had been pretreated with estradiol or dexamethasone. Mice were divided at random into different groups and then treated with itraconazole or IFN-y given by gastrogavage. The burden of the fungus in the vaginal lavage fluids in the mice of the different groups was measured dynamically at different time points after the beginning of the drug treatment. The difference in the effect of itraconazole on the vaginal candidiasis between normal immune system group （group A） and control group （group D） was statistically significant （P〈0.01）. The difference in the efficacy of itraconazole among immunosuppressed group （group E）, immuno-regulated group （group F） and the control group （group G） was statistically significant （P〈0.01）. But on the 5th, 6th, 7th, 9th, 11th day after the inoculation the average level of colony forming unit （CFU） of groups A, E and F showed no statistically significant difference （P〉0.05）. It is concluded that the efficacy of itraconazole in the treatment of the vaginal candidiasis under different immunity conditions （groups A, E and F） in mice were all good, but there was no difference in the anti-fungal effect of itraconazole among the three groups.

Selective Determination of Itraconazole in the Presence of Its Oxidative Degradation Product by A New Spectrophotometric Method

A simple,specific,accurate and precise spectrophotometric stability indicating method is developed for determination of itraconazole in the presence of its oxidative degradation product and in pharmaceutical formulations.A newly developed spectrophotometric method called ratio difference method by measuring the difference in amplitudes between 230 and 265nm of ratio spectra.The calibration curve is linear over the concentration range of 5~25μg·mL-1 with mean percentage recovery of 99.81±1.002.Selective quantification of itraconazole,singly in bulk form,pharmaceutical formulations and in the presence of its oxidative degradation product is demonstrated.The results have been statistically compared with a pharmacopeial method.

Supersaturation induced by Itraconazole/Soluplus micelles provided high GI absorption in vivo

To investigate the effect of supersaturation induced by micelle formation during dissolution on the bioavailability of itraconazole(ITZ)/Soluplus~? solid dispersion. Solid dispersions prepared by hot melt extrusion (HME) were compressed into tablets directly with other excipients. Dissolution behavior of ITZ tablets was studied by dissolution testing and the morphology of micelles in dissolution media was studied using transmission electron microscopy (TEM). Drug transferring from stomach into intestine was simulated to obtain a supersaturated drug solution. Bioavailability studies were performed on the ITZ tablets and Sporanox~? in beagle dogs. The morphology of micelles in the dissolution media was observed to be spherical in shape, with an average size smaller than 100 nm. The supersaturated solutions formed by Soluplus~? micelles were stable and no precipitation took place over a period of 180 min. Compared with Sporanox~?, ITZ tablets exhibited a 2.50-fold increase in the AUC (0–96) of ITZ and a 1.95-fold increase in its active metabolite hydroxyitraconazole (OHITZ) in the plasma of beagle dogs. The results obtained provided clear evidence that not only the increase in the dissolution rate in the stomach, but also the supersaturation produced by micelles in the small intestine may be of great assistance in the successful development of poorly water-soluble drugs. The micelles formed by Soluplus~? enwrapped the molecular ITZ inside the core which promoted the amount of free drug in the intestinal cavity and carried ITZ through the aqueous boundary layer(ABL), resulting in high absorption by passive transportation across biological membranes. The uptake of intact micelles through pinocytosis together with the inhibition of P-glycoprotein-mediated drug efflux in intestinal epithelia contributed to the absorption of ITZ in the gastrointestinal tract. These results indicate that HME with Soluplus~?, which can induce supersaturation by micelleformation, may be of great assistance to the successful development of poorly watersoluble drugs.

Ultra-performance liquid chromatography electrospray ionization-tandem mass spectrometry method for the simultaneous determination of itraconazole and hydroxy itraconazole in human plasma

A highly sensitive, selective, and precise ultra-performance liquid chromatography tandem mass spectrometry method was developed and validated for simultaneous quantification of itraconazole and hydroxy itraconazole in human plasma by a single liquid-liquid extraction step. The precursor to product ion transitions of m/z 705.3/392.3, m/z 721.2/408.3 and m/z 708.2/435.4 were used to detect and quantify itraconazole, hydroxy itraconazole and itraconazole-d3 respectively. The lower limit of quantitation was found to be 0.500 ng/mL for itraconazole and 1.00 ng/mL for hydroxy itraconazole. The mean recoveries for itraconazole and hydroxy itraconazole were found to be 100.045% and 100.021%, respectively. This developed method with a chromatographic run time of 2.0 min was successfully applied to a bioequivalence study of 100 mg itraconazole capsule.

Characterization of recrystallized itraconazole prepared by cooling and anti-solvent crystallization

The objective of the present study was to alter the crystal habit of itraconazole(ITZ)by cooling and anti-solvent crystallization and characterize its properties.ITZ was recrystallized in different solvents and the effects of each solvent on morphology of crystals,dissolution behavior and solid state of recrystallized drug particles were investigated.The results revealed that ITZ crystals recrystallized by cooling and anti-solvent crystallization showed the different crystal habits from the untreated ITZ.Using cooling crystallization tended to provide needle-shaped crystals while the crystals obtained from anti-solvent crystallization showed more flaky,plate shape.This indicated the importance of preparation method on nucleation and crystal growth.No change in drug polymorphism was observed,according to determination of thermal property and crystalline state by differential scanning calorimetry and powder X-ray diffractometry,respectively.The recrystallized ITZ showed higher drug dissolution than untreated ITZ and the highest drug dissolution was observed from the samples recrystallized in the presence of PEG 200,which provided the small plate-shaped crystals with tremendously increased in surface area.However,the increasing of drug dissolution is relatively small,therefore,further development may be required.

Itraconazole therapy for infant hemangioma:Two case reports

BACKGROUND Infantile hemangiomas(IHs)are the most common childhood benign tumors,showing distinctive progression characteristics and outcomes.Due to the high demand for aesthetics among parents of IH babies,early intervention is critical in some cases.β-Adrenergic blockers and corticosteroids are first-line medications for IHs,while itraconazole,an antifungal medicine,has shown positive results in recent years.CASE SUMMARY In the present study,itraconazole was applied to treat two IH cases.The therapeutic course lasted 80-90 d,during which the visible lesion faded by more than 90%.Moreover,no obvious side effects were reported,and the compliance of the baby and parents was desirable.CONCLUSION Although these outcomes further support itraconazole as an effective therapeutic choice for IHs,large-scale clinical and basic studies are still warranted to improve further treatment.

Development of Liposome containing sodium deoxycholate to enhance oral bioavailability of itraconazole

The aim of this study was to enhance oral bioavailability of itraconazole(ITZ) by developing Liposome containing sodium deoxycholate(ITZ-Lip-NaDC). The liposome, consisting of egg yolk lecithin and sodium deoxycholate, was prepared by thin-film dispersion method.Differential Scanning Calorimetry(DSC) results indicated an amorphous state in the liposome. The physicochemical characteristics including particle size, morphology, entrapment efficiency, dissolution properties were also investigated. The performance of single-pass intestinal infusion exhibited that the transport order of intestinal segment was jejunum,duodenum, colon and ileum, and that all the segments participated in the absorption of ITZ in intestinal tract. The bioavailability study in rats showed that the AUC0-72 of the liposome was nearly 1.67-fold higher than that of commercial capsules(SPORANOX) in terms of oral administration, and the RSD of AUC0-72 of ITZ-Lip-NaD C was also decreased. Our results indicated that ITZ-Lip-NaDC liposome was facilitated to improve dissolution efficiency,augment transmembrane absorption, and then enhance the oral bioavailability of ITZ,successfully.

Itraconazole通过靶向C1GALT1抑制胃癌细胞侵袭和转移

目的:探讨伊曲康唑(Itraconazole)对胃癌细胞侵袭转移的影响及机制。方法:体外培养胃癌AGS和MKN45细胞,Itraconazole处理后采用CCK-8和克隆形成测定细胞增殖,Transwell和划痕实验观察细胞侵袭迁移,流式细胞术检测细胞周期和凋亡。随后,利用TCGA数据库挖掘C1GALT1在胃癌组织中的表达谱,采用GSEA软件对C1GALT1进行功能注释,同时通过Western blot和Lectin blot分析Itraconazole对C1GALT1及其相关蛋白表达的影响。将C1GALT1过表达质粒转染至AGS和MKN45细胞,Transwell小室检测Itraconazole作用后细胞侵袭和迁移能力的变化。结果:功能实验发现,Itraconazole抑制胃癌细胞的增殖、侵袭和迁移,诱导G0/G1期阻滞,促进凋亡。生物信息学分析显示,C1GALT1在胃癌组织中高表达,且与O-糖基化途径及自噬通路密切相关。机理研究表明,Itraconazole下调胃癌细胞中C1GALT1的蛋白表达,并可阻断O-糖基化,提高自噬水平。过表达C1GALT1,Itraconazole对胃癌细胞侵袭和迁移的抑制作用减弱。结论:Itraconazole可通过直接靶向调节C1GALT1抑制胃癌细胞的侵袭和转移,在胃癌中具有抗肿瘤活性。

A New In-Situ Gel Formulation of Itraconazole for Vaginal Administration

In this paper, mucoadhesive in-situ gel with poloxamer and hydroxypropylmethylcellulose formulations of itraconazole were prepared for vaginal application. In addition, rheological, mechanical and mucoadhesive properties and syringeability of the formulations were characterized. The mixtures of Poloxamer 407 and 188 with two different types of hydroxypropylmethylcellulose were used as polymers for gel formulations. Flow rheometry studies and oscillatory analysis of each formulation were performed at 20℃ ± 0.1℃ and 37℃ ± 0.1℃. All formulations exhibited pseudo-plastic flow and typical gel-type mechanical spectra (G′ > G″) after the determined frequency value at 37℃. Texture profile analysis presented that F3 formulation containing 20% poloxamer 407, 10% poloxamer 188 and 0.5% hydroxypropylmethylcellulose appeared to offer more suitable mechanical and mucoadhesive performance. Using different hydroxypropylmethylcellulose type in formulations didn’t significantly change syringeability values. The evaluation of the entire candidate formulations indicated that vaginal formulation of itraconazole will be an alternative for the treatment of vaginal candidiasis with suitable textural and rheological properties. Our results showed that the developed formulations were found worthy of further studies.

Microemulsion-based hydrogels of itraconazole:Evaluation of characteristics and stability

Itraconazole (ITZ) is a broad spectrum triazole antifungal drug and commercially available as oral forms. However, effective topical forms are interesting to avoid systemic adverse effects,to directly deliver antifungal drugs to the target sites and to enhance patient compliance (1)Microemulsion-based hydrogel (MBH), a semisolid form of microemulsion (ME), is one of novel formulations practically used as topical drug carriers [2].

Preparation and physical properties of itraconazole-loaded nanoemulsions using pineapple starch as co-emulsifier

Pineapple plant(Ananascomosus L.Merr.)is a leading edible member of the Bromeliaceae family[1].Nanoemulsions containing itraconazole,a poorly water-soluble drug using pectin as a polymeric emulsifier,are currently under investigation[2].The physicochemical and rheological properties as well as structural characterizations of cassava and mungbean starches have been reported[3].However,the application of pineapple starch as co-emulsifier of pharmaceutical excipients for pharmaceutical industry has not been investigated.

Effect of itraconazole on the cornea in a murine suture model and penetrating keratoplasty model

AIM： To investigate the anti-（lymph）angiogenic and/or anti-inflammatory effect of itraconazole in a corneal suture model and penetrating keratoplasty（PK） model. METHODS： Graft survival, corneal neovascularization, and corneal lymphangiogenesis were compared among itraconazole, amphotericin B, dexamethasone, phosphate buffered saline（PBS） and surgery-only groups following subconjunctival injection in mice that underwent PK and corneal suture. Immunohistochemical staining and analysis were performed in each group. Real-time polymerase chain reaction（RT-PCR） was performed to quantify the expression of inflammatory cytokines（TNF-alpha, IL-6） and vascular endothelial growth factor（VEGF）-A, VEGF-C, VEGFR-2, and VEGFR-3.RESULTS： In the suture model, the itraconazole group showed less angiogenesis, less lymphangiogenesis, and less inflammatory infiltration than the PBS group（all P〈0.05）. The itraconazole group showed reduced expression of VEGF-A, VEGFR-2, TNF-alpha, IL-6 than the PBS group（all P〈0.05）. In PK model, the two-month graft survival rate was 28.57% in itraconazole group, 62.50% in dexamethasone group, 12.50% in PBS group, 0 in amphotericin B group and 0 in surgery-only group. Graft survival in the itraconazole group was higher than that in the amphotericin, PBS and surgery-only group（P=0.057, 0.096, 0.012, respectively）. The itraconazole group showed less total angiogenesis and lymphangiogenesis than PBS group（all P〈0.05）.CONCLUSION： Itraconazole decrease neovascularization, lymphangiogenesis, and inflammation in both a corneal suture model and PK model. Itraconazole has anti-（lymph）-angiogenic and anti-inflammatory effects in addition to its intrinsic antifungal effect and is therefore an alternative treatment option in cases where steroids cannot be used.

Itraconazole and Nail Scraping in the Treatment of Onychomycosis( A open trial of175 cases)

Objective Itraconazole pulse therapy is at lest as efficient as itraconazole continuous treatment for onychomyocsis, but the long term oral antimycotic therapy has potential hepatotoxicity.Methods\ 40% urea paste was thickly applied to each affected nail which was dressed by three cloth adhesive tapes. The urea paste was changed every day or every other day for 5 to 7 days. The sick softened nails were scraped off thoroughly with razer blade. After sick nails were removed, all patients received 200 mg of itraconazole twice a day for seven consecutive days. Results\ Fingernail onychomycosis were cured in 93% (130/140), markedly improved in 6.4% (9/140). Toenail onychomycosis were cured in 82% (29/35), markedly improved in 17.1(6/35). And in a 18 month follow up period, 16(10 2%) of 147 patients had relapses. Conclusion\ The treatment of onychomycosis with oral itraconazole plus nail scraping is as effective as that of itraconazole pulse therapy but has less side effect and lower cost.\;

负载纳米TiO_(2)石英砂功能集料-水泥石的界面粘结性能

光催化水泥基材料是先进建筑功能材料的研究热点之一,但传统内掺法制备的TiO_(2)-水泥基复合材料中TiO_(2)有效利用率低、经济效益差。针对此问题,采用负载法制备纳米TiO_(2)功能集料(QST),并将QST集料负载于普通水泥砂浆表面。研究QST集料对水泥砂浆干缩性能的影响,通过拉拔法测试QST集料与水泥石的界面粘结力;采用SEM、EDS、MIP等微观测试方法,研究纳米TiO_(2)对集料-水泥石界面过渡区水化产物、孔结构的影响。结果表明:与普通石英砂集料相比,表面负载纳米TiO_(2)的石英砂功能集料可减少水泥砂浆的干缩,提高集料-水泥石的界面粘结力。在QST集料-水泥石的界面过渡区,纳米TiO_(2)促进了水泥浆体的水化,减少了界面过渡区Ca(OH)2的富集,细化并改善了界面过渡区的孔结构。

青黛散联合伊曲康唑胶囊治疗难辨认癣的总有效率、真菌清除率和不良反应发生率

目的探析青黛散联合伊曲康唑胶囊治疗难辨认癣的总有效率、真菌清除率和不良反应发生率。方法便利选取2021年5月—2023年2月于厦门市中医院就诊的50例难辨认癣患者为研究对象,随机数表法分为两组,每组25例。参照组采用伊曲康唑胶囊治疗,研究组在参照组基础上给予青黛散治疗。对比两组治疗效果、真菌清除率、不良反应发生率及炎症因子水平。结果研究组治疗总有效率为96.00%,高于参照组的68.00%,差异有统计学意义(χ^(2)=4.878,P<0.05)。研究组真菌总清除率高于参照组,差异有统计学意义(P<0.05)。研究组不良反应总发生率低于参照组,差异有统计学意义(P<0.05)。治疗后,研究组炎症因子水平低于参照组,差异有统计学意义(P<0.05)。结论对难辨癣患者给予青黛散联合伊曲康唑胶囊治疗可有效提升治疗效果,提高真菌清除率,降低炎性反应,降低不良反应发生率。