scholarly journals Ibuprofen-Loaded Hyaluronic Acid Nanofibrous Membranes for Prevention of Postoperative Tendon Adhesion through Reduction of Inflammation

2019 ◽  
Vol 20 (20) ◽  
pp. 5038 ◽  
Author(s):  
Chien-Tzung Chen ◽  
Chih-Hao Chen ◽  
Chialin Sheu ◽  
Jyh-Ping Chen
Keyword(s):  
Hyaluronic Acid ◽  
Chemical Properties ◽  
Diglycidyl Ether ◽  
In Vivo Studies ◽  
Gravimetric Analysis ◽  
Barrier Membrane ◽  
Fibroblast Attachment ◽  
Anti Inflammation

A desirable multi-functional nanofibrous membrane (NFM) for prevention of postoperative tendon adhesion should be endowed with abilities to prevent fibroblast attachment and penetration and exert anti-inflammation effects. To meet this need, hyaluronic acid (HA)/ibuprofen (IBU) (HAI) NFMs were prepared by electrospinning, followed by dual ionic crosslinking with FeCl3 (HAIF NFMs) and covalent crosslinking with 1,4-butanediol diglycidyl ether (BDDE) to produce HAIFB NFMs. It is expected that the multi-functional NFMs will act as a physical barrier to prevent fibroblast penetration, HA will reduce fibroblast attachment and impart a lubrication effect for tendon gliding, while IBU will function as an anti-inflammation drug. For this purpose, we successfully fabricated HAIFB NFMs containing 20% (HAI20FB), 30% (HAI30FB), and 40% (HAI40FB) IBU and characterized their physico-chemical properties by scanning electron microscopy, Fourier transformed infrared spectroscopy, thermal gravimetric analysis, and mechanical testing. In vitro cell culture studies revealed that all NFMs except HAI40FB possessed excellent effects in preventing fibroblast attachment and penetration while preserving high biocompatibility without influencing cell proliferation. Although showing significant improvement in mechanical properties over other NFMs, the HAI40FB NFM exhibited cytotoxicity towards fibroblasts due to the higher percentage and concentration of IBU released form the membrane. In vivo studies in a rabbit flexor tendon rupture model demonstrated the efficacy of IBU-loaded NFMs (HAI30FB) over Seprafilm® and NFMs without IBU (HAFB) in reducing local inflammation and preventing tendon adhesion based on gross observation, histological analyses, and biomechanical functional assays. We concluded that an HAI30FB NFM will act as a multi-functional barrier membrane to prevent peritendinous adhesion after tendon surgery.

Mitochondrial Targeted Doxorubicin-Triphenylphosphonium Delivered by Hyaluronic Acid Modified and pH Responsive Nanocarriers to Breast Tumor: in Vitro and in Vivo Studies

2018 ◽  
Vol 15 (3) ◽  
pp. 882-891 ◽  
Author(s):  
Hui-Na Liu ◽  
Ning-Ning Guo ◽  
Tian-Tian Wang ◽  
Wang-Wei Guo ◽  
Meng-Ting Lin ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Breast Tumor ◽  
In Vivo Studies ◽  
Ph Responsive

Fabrication, characterization and evaluation of the efficacy of gelatin/hyaluronic acid microporous scaffolds suffused with aloe-vera in a rat burn model

2021 ◽  
pp. 088532822110618
Author(s):  
Lalita Mehra ◽  
Smritee Mehra ◽  
Nidhi Tiwari ◽  
Thakuri Singh ◽  
Harish Rawat ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Growth Factor ◽  
Aloe Vera ◽  
Gamma Scintigraphy ◽  
Gravimetric Analysis ◽  
Burn Wounds ◽  
Partial Thickness ◽  
Partial Thickness Burn

Burn induced injuries are commonly encountered in civilian and military settings, leading to severe morbidity and mortality. Objective of this study was to construct microporous bioactive scaffolds of gelatin-hyaluronic acid suffused with aloe-vera gel (Gela/HA/AvG), and to evaluate their efficacy in healing partial-thickness burn wounds. Scaffolds were characterized using Fourier transform-infrared spectroscopy, Scanning electron microscopy, and Thermo-gravimetric analysis to understand intermolecular interactions and morphological characteristics. In-vitro fluid uptake ability and hemolytic index of test scaffolds were also determined. In-vitro collagenase digestion was done to assess biodegradability of scaffolds. Wound retraction studies were carried out in Sprague Dawley rats inflicted with partial-thickness burn wounds to assess and compare efficacy of optimized scaffolds with respect to negative and positive control groups. In-vivo gamma scintigraphy using Technetium-99m labeled Immunoglobulin-G ( 99m Tc-IgG) as imaging agent was also performed to validate efficacy results. Histological and immunohistochemical comparison between groups was also made. Scaffolds exhibited mircoporous structure, with pore size getting reduced from 41.3 ± 4.3 µm to 30.49 ± 5.7 µm when gelatin conc. was varied from 1% to 5%. Optimized test scaffolds showed sustained in-vitro swelling behavior, were biodegradable and showed hemolytic index in range of 2.4–4.3%. Wound retraction study along with in-vivo gamma scintigraphy indicated that Gela/HA/AvG scaffolds were not only able to reduce local inflammation faster but also accelerated dermis regeneration. Immunohistochemical analysis, in terms of expression levels of epidermal growth factor and fibroblast growth factor-2 also corroborated in-vivo efficacy findings. Gela/HA/AvG scaffolds, therefore, can potentially be developed into an effective dermal regeneration template for partial-thickness burn wounds.

scholarly journals Fabrication of Injectable, Porous Hyaluronic Acid Hydrogel Based on an In-Situ Bubble-Forming Hydrogel Entrapment Process

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1138
Author(s):  
Lixuan Wang ◽  
Shiyan Dong ◽  
Yutong Liu ◽  
Yifan Ma ◽  
Jingjing Zhang ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Regenerative Medicine ◽  
In Vivo Studies ◽  
Injectable Hydrogels ◽  
Cell Behaviors ◽  
Porous Architecture ◽  
In Situ Hydrogel

Injectable hydrogels have been widely applied in the field of regenerative medicine. However, current techniques for injectable hydrogels are facing a challenge when trying to generate a biomimetic, porous architecture that is well-acknowledged to facilitate cell behaviors. In this study, an injectable, interconnected, porous hyaluronic acid (HA) hydrogel based on an in-situ bubble self-generation and entrapment process was developed. Through an amide reaction between HA and cystamine dihydrochloride activated by EDC/NHS, CO2 bubbles were generated and were subsequently entrapped inside the substrate due to a rapid gelation-induced retention effect. HA hydrogels with different molecular weights and concentrations were prepared and the effects of the hydrogel precursor solution’s concentration and viscosity on the properties of hydrogels were investigated. The results showed that HA10-10 (10 wt.%, MW 100,000 Da) and HA20-2.5 (2.5 wt.%, MW 200,000 Da) exhibited desirable gelation and obvious porous structure. Moreover, HA10-10 represented a high elastic modulus (32 kPa). According to the further in vitro and in vivo studies, all the hydrogels prepared in this study show favorable biocompatibility for desirable cell behaviors and mild host response. Overall, such an in-situ hydrogel with a self-forming bubble and entrapment strategy is believed to provide a robust and versatile platform to engineer injectable hydrogels for a variety of applications in tissue engineering, regenerative medicine, and personalized therapeutics.

scholarly journals Persistent, bioaccumulative, and toxic properties of liquid crystal monomers and their detection in indoor residential dust

2019 ◽  
Vol 116 (52) ◽  
pp. 26450-26458 ◽  
Author(s):  
Huijun Su ◽  
Shaobo Shi ◽  
Ming Zhu ◽  
Doug Crump ◽  
Robert J. Letcher ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Chemical Properties ◽  
Liquid Crystal Displays ◽  
In Vivo Studies ◽  
Indoor Environments ◽  
Initial Screening ◽  
Environmental Matrices ◽  
The World

Liquid crystal monomers (LCMs) are used widely in liquid crystal displays (LCDs), which are dramatically changing the world due to the provision of convenient communication. However, there are essentially no published reports on the fate and/or effects of LCMs in the environment. Of 362 currently produced LCMs, 87 were identified as persistent and bioaccumulative (P&B) chemicals, which indicated that these chemicals would exhibit resistance to degradation and exhibit mobility after entering the environment. Following exposure to mixtures of LCM collected from 6 LCD devices, significant modulation of 5 genes,CYP1A4,PDK4,FGF19,LBFABP, andTHRSP, was observed in vitro. Modulation of expressions of mRNAs coding for these genes has frequently been reported for toxic (T) persistent organic pollutants (POPs). In LCM mixtures, 33 individual LCMs were identified by use of mass spectrometry and screened for in 53 samples of dust from indoor environments. LCMs were detectable in 47% of analyzed samples, and 17 of the 33 LCMs were detectable in at least 1 sample of dust. Based on chemical properties, including P&B&T of LCMs and their ubiquitous detection in dust samples, the initial screening information suggests a need for studies to determine status and trends in concentrations of LCMs in various environmental matrices as well as tissues of humans and wildlife. There is also a need for more comprehensive in vivo studies to determine toxic effects and potencies of LCMs during chronic, sublethal exposures.

scholarly journals Targetability of hyaluronic acid nanogel to cancer cells : In vitro and in vivo studies

2017 ◽  
Vol 104 ◽  
pp. 102-113 ◽  
Author(s):  
S.S. Pedrosa ◽  
P. Pereira ◽  
A. Correia ◽  
F.M. Gama
Keyword(s):  
Hyaluronic Acid ◽  
Cancer Cells ◽  
In Vivo Studies

scholarly journals Valorization of Natural Antioxidants for Nutritional and Health Applications

2021 ◽  
Author(s):  
Pedro Ferreira-Santos ◽  
Zlatina Genisheva ◽  
Claudia Botelho ◽  
Cristina Rocha ◽  
José António Teixeira
Keyword(s):  
Bioactive Compounds ◽  
Antioxidant Properties ◽  
Chemical Properties ◽  
Health Benefit ◽  
Natural Antioxidants ◽  
Extraction Process ◽  
Extraction Methods ◽  
In Vivo Studies

The significant increase in the world population age, 47 years in 1950 to 73 years in 2020, resulted in an increase in aging related diseases as well as in degenerative diseases. In consequence, researchers have been focusing in the development of new therapies, with a particular emphasis on the use of compounds with antioxidant properties, namely phytochemicals, such as polyphenols and carotenoids. Several in vitro and in vivo studies have demonstrated the phytochemicals antioxidant capacity. Their use is broad, as they can be part of food supplements, medicine and cosmetics. The health benefit of antioxidant phytochemicals is an indisputable question. Phytochemical properties are highly influenced by the natural matrix as well as by extraction process, which have a key role. There are several extraction methods that can be applied depending on the chemical properties of the bioactive compounds. There is a wide range of solvents with different polarities, which allows a selective extraction of the desired target family of compounds. Greener technologies have the advantage to reduce extraction time and solvent quantity in comparison to the most traditional methods. This chapter will focus on the different green extraction strategies related to the recovery of antioxidant bioactive compounds from natural sources, their nutritional and health potential.

Wound healing of nanofiber comprising Polygalacturonic/Hyaluronic acid embedded silver nanoparticles: In-vitro and in-vivo studies

2020 ◽  
Vol 238 ◽  
pp. 116175 ◽  
Author(s):  
M.R. El-Aassar ◽  
Omar M. Ibrahim ◽  
Moustafa M.G. Fouda ◽  
Nagham G. El-Beheri ◽  
Mona M. Agwa
Keyword(s):  
Wound Healing ◽  
Silver Nanoparticles ◽  
Hyaluronic Acid ◽  
In Vivo Studies

scholarly journals Cross-linked hyaluronic acid gel inhibits metastasis and growth of gastric and hepatic cancer cells: in vitro and in vivo studies

Oncotarget ◽  
2016 ◽  
Vol 7 (40) ◽  
pp. 65418-65428 ◽  
Author(s):  
Ting Lan ◽  
Ji Pang ◽  
Yan Wu ◽  
Miaolin Zhu ◽  
Xiaoyuan Yao ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Cancer Cells ◽  
In Vivo Studies ◽  
Hepatic Cancer ◽  
Acid Gel ◽  
Hyaluronic Acid Gel

Using cross-linked hyaluronic acid gel to prevent postoperative lumbar epidural space adhesion: in vitro and in vivo studies

2019 ◽  
Vol 29 (1) ◽  
pp. 129-140
Author(s):  
Kun Wang ◽  
Xiao long Li ◽  
Jinbo Liu ◽  
Xiaoliang Sun ◽  
Huilin Yang ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Epidural Space ◽  
In Vivo Studies ◽  
Acid Gel ◽  
Hyaluronic Acid Gel
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