International Journal of Pharmaceutics: X最新文献

{"title":"Magnetic nanosystem a tool for targeted delivery and diagnostic application: Current challenges and recent advancement","authors":"Nilesh Rarokar ,&nbsp;Sakshi Yadav ,&nbsp;Suprit Saoji ,&nbsp;Pratiksha Bramhe ,&nbsp;Rishabh Agade ,&nbsp;Shailendra Gurav ,&nbsp;Pramod Khedekar ,&nbsp;Vetriselvan Subramaniyan ,&nbsp;Ling Shing Wong ,&nbsp;Vinoth Kumarasamy","doi":"10.1016/j.ijpx.2024.100231","DOIUrl":"10.1016/j.ijpx.2024.100231","url":null,"abstract":"<div><p>Over the last two decades, researchers have paid more attention to magnetic nanosystems due to their wide application in diverse fields. The metal nanomaterials' antimicrobial and biocidal properties make them an essential nanosystem for biomedical applications. Moreover, the magnetic nanosystems could have also been used for diagnosis and treatment because of their magnetic, optical, and fluorescence properties. Superparamagnetic iron oxide nanoparticles (SPIONs) and quantum dots (QDs) are the most widely used magnetic nanosystems prepared by a simple process. By surface modification, researchers have recently been working on conjugating metals like silica, copper, and gold with magnetic nanosystems. This hybridization of the nanosystems modifies the structural characteristics of the nanomaterials and helps to improve their efficacy for targeted drug and gene delivery. The hybridization of metals with various nanomaterials like micelles, cubosomes, liposomes, and polymeric nanomaterials is gaining more interest due to their nanometer size range and nontoxic, biocompatible nature. Moreover, they have good injectability and higher targeting ability by accumulation at the target site by application of an external magnetic field. The present article discussed the magnetic nanosystem in more detail regarding their structure, properties, interaction with the biological system, and diagnostic applications.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156724000033/pdfft?md5=cee03f07eda27af8fd23e76f73a2b37a&pid=1-s2.0-S2590156724000033-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139631332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formulation, optimization and evaluation of ocular gel containing nebivolol Hcl-loaded ultradeformable spanlastics nanovesicles: In vitro and in vivo studies","authors":"Mohamed Yasser ,&nbsp;Eman E. El Naggar ,&nbsp;Nehal Elfar ,&nbsp;Mahmoud H. Teaima ,&nbsp;Mohamed A. El-Nabarawi ,&nbsp;Sammar Fathy Elhabal","doi":"10.1016/j.ijpx.2023.100228","DOIUrl":"10.1016/j.ijpx.2023.100228","url":null,"abstract":"<div><p>The study aims to improve the ocular delivery of Nebivolol HCL (NBV) belonging to the Biopharmaceutics classification system (BCSII) by using spanlastic nanovesicles (SNVs) for ophthalmic delivery and incorporating them into hydroxypropyl methylcellulose gel with ketorolac tromethamine (KET) as an anti-inflammatory to improve glaucoma complications like Conjunctivitis. SNVs were prepared by ethanol injection technique using span (60) as a surfactant and labrasol as an edge activator (EA). The impact of formulation factors on SNVs properties was investigated using a Box-Behnken design. In vitro evaluations showed that the formulations (F1, F4, and F14), containing Span 60 and labrasol as EA (25%, 50%, and 25%), exhibited high EE% with low PS and high ZP and DI. Additionally, 61.72 ± 0.77%, 58.97 ± 1.44%, and 56.20 ± 2.32% of the NBV amount were released from F1, F4, and F14 after 5 h, compared to 93.94 ± 1.21% released from drug suspension. The selected formula (G1), containing F1 in combination with KET and 2% <em>w</em>/w HPMC, exhibited 76.36 ± 0.90% drug release after 12 h. Ex vivo Confocal laser scanning revealed a high penetration of NBV-SNVs gel that ascertained the results of the in-vitro <em>study</em>. In vivo studies showed a significant decrease in glaucoma compared to drug suspension, and histopathological studies showed improvement in glaucomatous eye retinal atrophy. G1 is considered a promising approach to improving ocular permeability, absorption, and anti-inflammatory activity, providing a safer alternative to current regimens.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156723000725/pdfft?md5=b2ff799666c90e95ea2c791759c45b4b&pid=1-s2.0-S2590156723000725-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139631782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Everolimus-encapsulation in Pluronic P123 self-assembled micelles as drug delivery systems for drug-coated balloons","authors":"Mohammad Akrami-Hasan-Kohal ,&nbsp;Adrien Chouchou ,&nbsp;Sébastien Blanquer ,&nbsp;Tahmer Sharkawi","doi":"10.1016/j.ijpx.2024.100230","DOIUrl":"https://doi.org/10.1016/j.ijpx.2024.100230","url":null,"abstract":"<div><p>Drug-coated balloons (DCBs) are effective tools for cardiovascular interventions, ensuring uniform drug delivery to occluded arteries. This research investigates the potential of Pluronic P123 (P123), a micelle-forming polymer, to solubilize and release Everolimus (EVE) from DCBs. Furthermore, it seeks to understand how the ratio of P123 to EVE affects release rates and micelle formation under physiological conditions. We tested three P123 to EVE ratios: 90:10, 75:25, and 50:50. Microscopy revealed that increasing EVE proportions resulted in more uniform coatings. Fourier-transform infrared spectroscopy (FTIR) analysis confirmed the successful incorporation of EVE into the P123 matrix without altering its chemical properties. Differential scanning calorimetry (DSC) studies showed that EVE incorporation affected the crystalline structure of P123, leading to more uniform coatings. In vitro release studies showed that all formulations had &lt;1% drug loss in the first minute (the tracking phase); furthermore, the 90:10 ratio exhibited optimal drug release in the following 3 min, corresponding to the deployment phase in DCB angioplasty. Analysis of micelle loading capacity (LC), encapsulation efficiency (EE), size, and structure indicated an increase in both LC and EE with higher EVE content and a corresponding enlargement in micelle size. Given these findings, the optimized formula provided a consistent coating on commercial balloons, highlighting the potential of using P123 for DCB drug coating and release.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156724000021/pdfft?md5=c594d2ed3f793f14634838a04c5b3943&pid=1-s2.0-S2590156724000021-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139433425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of treatment with original or biosimilar adalimumab on SARS-CoV2 vaccination antibody titers","authors":"Eva Dokoupilová ,&nbsp;David Vetchý ,&nbsp;Sylvie Pavloková ,&nbsp;Markéta Hanuštiaková","doi":"10.1016/j.ijpx.2024.100229","DOIUrl":"10.1016/j.ijpx.2024.100229","url":null,"abstract":"<div><p>The technological process of production of biosimilars determines the degree of biosimilarity to the original biological drug. In particular, the focus is on the similarity of immunogenic responses. The primary endpoint of our retrospective study was to find the differences in SARS-CoV-2 antibody amount between patients treated with original adalimumab and biosimilar adalimumab MSB11022 (Idacio) and the differences in the SARS-CoV-2 antibody amount between patients treated with and without biological treatment. We collected the gender, autoimmune disease type, age, and treatment data of the patients in the outpatient clinic MEDICAL PLUS, s.r.o., Uherske Hradiste. These patients suffer from autoimmune rheumatic diseases. All patients received the mRNA vaccine (Pfizer/BioNTech – BNT162b2), with a 21-day (interquartile range, 21–24) gap between the two vaccinations. Patients receiving adalimumab were able to develop cellular immune responses after the second vaccination dose, as well as the individuals without adalimumab. In the period of 6–23 weeks after the second vaccination dose (D63 – D182), the SARS-CoV-2 antibody levels did not change significantly in the patients receiving the original adalimumab, while in the patients receiving biosimilar adalimumab a significant decrease was revealed. A statistically significant difference in the SARS-CoV-2 antibody amount between the patients without biological treatment (median: 504.3 U/mL) and with biological treatment (Original and Biosimilar – median: 47.2 and 28.2 U/mL, respectively) was confirmed on day 182. According to our observation, the effect of the treatment type on the increase/decrease of antibodies over time is dominant, while the impact of other variables (gender, methotrexate treatment, autoimmune disease type, and age) was confirmed as insignificant or minor.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259015672400001X/pdfft?md5=ee42becd18e7a46e551fcbc81f1c9731&pid=1-s2.0-S259015672400001X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139392470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional candesartan loaded lipid nanoparticles for the control of diabetes-associated stroke: In vitro and in vivo studies","authors":"Dina M. Mahmoud ,&nbsp;Mohammed R.A. Ali ,&nbsp;Basmah Nasser Aldosari ,&nbsp;Randa Mohammed Zaki ,&nbsp;Obaid Afzal ,&nbsp;Alaa S. Tulbah ,&nbsp;Demiana M. Naguib ,&nbsp;Mohamed I. Zanaty ,&nbsp;Mary Eskander Attia ,&nbsp;Fatma I. Abo El-Ela ,&nbsp;Amr Gamal Fouad","doi":"10.1016/j.ijpx.2023.100227","DOIUrl":"https://doi.org/10.1016/j.ijpx.2023.100227","url":null,"abstract":"<div><p>Diabetes mellitus is a metabolic disease that raises the odds of developing stroke. Candesartan has been used to prevent stroke due to its inhibitory effects on blood pressure, angiogenesis, oxidative damage, and apoptosis. However, oral candesartan has very limited bioavailability and efficacy due to its weak solubility and slow release. The study aimed to develop a nasal formulation of candesartan-loaded liposomes containing ethanol and propylene glycol (CLEP) to improve candesartan's delivery, release, permeation, and efficacy as a potential diabetes-associated stroke treatment. Using design expert software, different CLEP formulations were prepared and evaluated in vitro to identify the optimum formulation, which.</p><p>The selected optimum formulation composed of 3.3% phospholipid, 10% ethanol, and 15% propylene glycol significantly increased the release and permeation of candesartan relative to free candesartan by a factor of 1.52 and 1.47, respectively. The optimum formulation significantly reduced the infarction after stroke in rats; decreased flexion, spontaneous motor activity, and time spent in the target quadrant by 70%, 64.71%, and 92.31%, respectively, and enhanced grip strength by a ratio of 2.3. Therefore, nasal administration of the CLEP formulation could be a potential diabetes-associated stroke treatment.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156723000713/pdfft?md5=412a64e4b586722fa610cce4f18f071f&pid=1-s2.0-S2590156723000713-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139108936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Batch vs. continuous direct compression – a comparison of material processability and final tablet quality","authors":"B. Bekaert ,&nbsp;P.H.M. Janssen ,&nbsp;S. Fathollahi ,&nbsp;D. Vanderroost ,&nbsp;T. Roelofs ,&nbsp;B.H.J. Dickhoff ,&nbsp;C. Vervaet ,&nbsp;V. Vanhoorne","doi":"10.1016/j.ijpx.2023.100226","DOIUrl":"10.1016/j.ijpx.2023.100226","url":null,"abstract":"<div><p>In this study, an in-depth comparison was made between batch and continuous direct compression using similar compression set-ups. The overall material processability and final tablet quality were compared and evaluated. Correlations between material properties, process parameters and final tablet properties were made via multivariate data analyses. In total, 10 low-dosed (1% <em>w</em>/w) and 10 high-dosed (40% w/w) formulations were processed, using a total of 10 different fillers/filler combinations. The trials indicated that the impact of filler type, drug load or process settings was similar for batch and continuous direct compression. The main differentiator between batch and continuous was the flow dynamics in the operating system, where properties related to flow, compressibility and permeability played a crucial role. The less consistent flow throughout a batch process resulted in a significantly higher variability within the tablet press (σ_CF) and for the tablet quality responses (σ_Mass, σ_TS). However, the better controlled blending procedure prior to batch processing was reflected in a more consistent API concentration variability. Overall, the comparison showed the benefits of selecting appropriate excipients and process settings to achieve a specific outcome, keeping in mind some key differentiators between both processes.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156723000701/pdfft?md5=d5972570d4733ad868b94602ba419d01&pid=1-s2.0-S2590156723000701-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139021461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repurposing celecoxib for colorectal cancer targeting via pH-triggered ultra-elastic nanovesicles: Pronounced efficacy through up-regulation of Wnt/β-catenin pathway in DMH-induced tumorigenesis","authors":"Shahira F. El Menshawe ,&nbsp;Khaled Shalaby ,&nbsp;Mohammed H. Elkomy ,&nbsp;Heba M. Aboud ,&nbsp;Yasmin M. Ahmed ,&nbsp;Abdelmeged A. Abdelmeged ,&nbsp;Marwa Elkarmalawy ,&nbsp;Mahmoud A. Abou Alazayem ,&nbsp;Amani M. El Sisi","doi":"10.1016/j.ijpx.2023.100225","DOIUrl":"10.1016/j.ijpx.2023.100225","url":null,"abstract":"<div><p>Celecoxib (CLX), a selective inhibitor for cyclooxygenase 2 (COX-2), has manifested potential activity against diverse types of cancer. However, low bioavailability and cardiovascular side effects remain the major challenges that limit its exploitation. In this work, we developed ultra-elastic nanovesicles (UENVs) with pH-triggered surface charge reversal traits that could efficiently deliver CLX to colorectal segments for snowballed tumor targeting. CLX-UENVs were fabricated via a thin-film hydration approach. The impact of formulation factors (Span 80, Tween 80, and sonication time) on the nanovesicular features was evaluated using Box–Behnken design, and the optimal formulation was computed. The optimum formulation was positively coated with polyethyleneimine (CLX-PEI-UENVs) and then coated with Eudragit S100 (CLX-ES-PEI-UENVs). The activity of the optimized nano-cargo was explored in 1,2-dimethylhydrazine-induced colorectal cancer in Wistar rats. Levels of COX-2, Wnt-2 and β-catenin were assessed in rats' colon. The diameter of the optimized CLX-ES-PEI-UENVs formulation was 253.62 nm, with a zeta potential of −23.24 mV, 85.64% entrapment, and 87.20% cumulative release (24 h). ES coating hindered the rapid release of CLX under acidic milieu (stomach and early small intestine) and showed extended release in the colon section. In colonic environments, the ES coating layer was removed due to high pH, and the charge on the nanovesicular corona was shifted from negative to positive. Besides, a pharmacokinetics study revealed that CLX-ES-PEI-UENVs had superior oral bioavailability by 2.13-fold compared with CLX suspension. Collectively, these findings implied that CLX-ES-PEI-UENVs could be a promising colorectal-targeted nanoplatform for effective tumor management through up-regulation of the Wnt/β-catenin pathway.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156723000695/pdfft?md5=3b125d769dd69d3e0eed17cee103de1e&pid=1-s2.0-S2590156723000695-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139018759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase homogeneity in ternary amorphous solid dispersions and its impact on solubility, dissolution and supersaturation – Influence of processing and hydroxypropyl cellulose grade","authors":"Florian Pöstges ,&nbsp;Jonas Lenhart ,&nbsp;Edmont Stoyanov ,&nbsp;Dominique J. Lunter ,&nbsp;Karl G. Wagner","doi":"10.1016/j.ijpx.2023.100222","DOIUrl":"https://doi.org/10.1016/j.ijpx.2023.100222","url":null,"abstract":"<div><p>As performance of ternary amorphous solid dispersions (ASDs) depends on the solid-state characteristics and polymer mixing, a comprehensive understanding of synergistic interactions between the polymers in regard of dissolution enhancement of poorly soluble drugs and subsequent supersaturation stabilization is necessary. By choosing hot-melt extrusion (HME) and vacuum compression molding (VCM) as preparation techniques, we manipulated the phase behavior of ternary efavirenz (EFV) ASDs, comprising of either hydroxypropyl cellulose (HPC)-SSL or HPC-UL in combination with Eudragit® L 100–55 (EL 100–55) (50:50 polymer ratio), leading to single-phased (HME) and heterogeneous ASDs (VCM). Due to higher kinetic solid-state solubility of EFV in HPC polymers compared to EL 100–55, we visualized higher drug distribution into HPC-rich phases of the phase-separated ternary VCM ASDs via confocal Raman microscopy. Additionally, we observed differences in the extent of phase-separation in dependence on the selected HPC grade. As HPC-UL exhibited decisive lower melt viscosity than HPC-SSL, formation of partially miscible phases between HPC-UL and EL 100–55 was facilitated. Consequently, as homogeneously mixed polymer phases were required for optimal extent of solubility improvement, the manufacturing-dependent differences in dissolution performances were smaller using HPC-UL, instead of HPC-SSL, i.e. using HPC-UL was less demanding on shear stress provided by the process.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259015672300066X/pdfft?md5=eceb5b4bdd3f4f8914869d63b82819de&pid=1-s2.0-S259015672300066X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138501550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring high-throughput synchrotron X-Ray powder diffraction for the structural analysis of pharmaceuticals","authors":"M. Reinle-Schmitt ,&nbsp;D. Šišak Jung ,&nbsp;M. Morin ,&nbsp;F.N. Costa ,&nbsp;N. Casati ,&nbsp;F. Gozzo","doi":"10.1016/j.ijpx.2023.100221","DOIUrl":"https://doi.org/10.1016/j.ijpx.2023.100221","url":null,"abstract":"<div><p>Synchrotron radiation offers a host of advanced properties, surpassing conventional laboratory sources with its high brightness, tunable phonon energy, photon beam coherence for advanced X-ray imaging, and a structured time profile, ideal for capturing dynamic atomic and molecular processes. However, these benefits come at the cost of operational complexity and expenses. Three decades ago, synchrotron radiation facilities, while technically open to all scientists, primarily served a limited community. Despite substantial accessibility improvements over the past two decades, synchrotron measurements still do not qualify as routine analyses. The intrinsic complexity of synchrotron science means experiments are pursued only when no alternatives suffice. In recent years, strides have been made in technology transfer offices, intermediate synchrotron-based analytical service companies, and the development of high-throughput synchrotron systems at various facilities, reshaping the perception of synchrotron science. This article investigates the practical application of synchrotron X-Ray Powder Diffraction (s-XRPD) techniques in pharmaceutical analysis. By utilizing concrete examples, we demonstrate how high-throughput systems have the potential to revolutionize s-XRPD applications in the pharmaceutical industry, rapidly generating XRPD patterns of comparable or superior quality to those obtained in state-of-the-art laboratory XRPD, all in less than 5 s. Additional cases featuring well-established pharmaceutical active ingredients (API) and excipients substantiate the concept of high throughput in pharmaceuticals, affirming data quality through structural refinements aligned with literature-derived unit cell parameters. Synchrotron data need not always be state-of-the-art to compete with lab-XRPD data. The key lies in ensuring user-friendliness, reproducibility, accessibility, cost-effectiveness, and the streamlined efforts associated with synchrotron instrumentation to remain highly competitive with their laboratory counterparts.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156723000658/pdfft?md5=bdd4c40c9de053d34e051f057dbed0f0&pid=1-s2.0-S2590156723000658-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138489950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drug release from PLGA microparticles can be slowed down by a surrounding hydrogel","authors":"L.A. Lefol ,&nbsp;P. Bawuah ,&nbsp;J.A. Zeitler ,&nbsp;J. Verin ,&nbsp;F. Danede ,&nbsp;J.F. Willart ,&nbsp;F. Siepmann ,&nbsp;J. Siepmann","doi":"10.1016/j.ijpx.2023.100220","DOIUrl":"https://doi.org/10.1016/j.ijpx.2023.100220","url":null,"abstract":"<div><p>This study aimed to evaluate and better understand the potential impact that a layer of surrounding hydrogel (mimicking living tissue) can have on the drug release from PLGA microparticles. Ibuprofen-loaded microparticles were prepared with an emulsion solvent extraction/evaporation method. The drug loading was about 48%. The surface of the microparticles appeared initially smooth and non-porous. In contrast, the internal microstructure of the particles exhibited a continuous network of tiny pores. Ibuprofen release from <em>single</em> microparticles was measured into agarose gels and well-agitated phosphate buffer pH 7.4. Optical microscopy, scanning electron microscopy, differential scanning calorimetry, X-ray powder diffraction, and X-ray μCT imaging were used to characterize the microparticles before and after exposure to the release media. Importantly, ibuprofen release was much slower in the presence of a surrounding agarose gel, e.g., the complete release took two weeks vs. a few days in well agitated phosphate buffer. This can probably be attributed to the fact that the hydrogel sterically hinders substantial system swelling and, thus, slows down the related increase in drug mobility. In addition, <em>in this particular case</em>, the convective flow in agitated bulk fluid likely damages the thin PLGA layer at the microparticles' surface, giving the outer aqueous phase more rapid access to the inner continuous pore network: Upon contact with water, the drug dissolves and rapidly diffuses out through a continuous network of water-filled channels. Without direct surface access, most of the drug “has to wait” for the onset of substantial system swelling to be released.</p></div>","PeriodicalId":14280,"journal":{"name":"International Journal of Pharmaceutics: X","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590156723000646/pdfft?md5=2256955295ef46f3284e7a88abf6dd21&pid=1-s2.0-S2590156723000646-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138489949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}