RÉSUMÉ
PURPOSE: The epithelial-mesenchymal transition of human lens epithelial cells plays a role in posterior capsule opacification, a fibrotic process that leads to a common type of cataract. Hyaluronic acid has been implicated in this fibrosis. Studies have investigated the role of transforming growth factor (TGF)-ß2 in epithelial-mesenchymal transition. However, the role of TGF-ß2 in hyaluronic acid-mediated fibrosis of lens epithelial cell remains unknown. We here examined the role of TGF-ß2 in the hyaluronic acid-mediated epithelial-mesenchymal transition of lens epithelial cells. METHODS: Cultured human lens epithelial cells (HLEB3) were infected with CD44-siRNA by using the Lipofectamine 3000 transfection reagent. The CCK-8 kit was used to measure cell viability, and the scratch assay was used to determine cell migration. Cell oxidative stress was analyzed in a dichloro-dihydro-fluorescein diacetate assay and by using a flow cytometer. The TGF-ß2 level in HLEB3 cells was examined through immunohistochemical staining. The TGF-ß2 protein level was determined through western blotting. mRNA expression levels were determined through quantitative real-time polymerase chain reaction. RESULTS: Treatment with hyaluronic acid (1.0 µM, 24 h) increased the epithelial-mesenchymal transition of HLEB3 cells. The increase in TGF-ß2 levels corresponded to an increase in CD44 levels in the culture medium. However, blocking the CD44 function significantly reduced the TGF-ß2-mediated epithelial-mesenchymal transition response of HLEB3 cells. CONCLUSIONS: Our study showed that both CD44 and TGF-ß2 are critical contributors to the hyaluronic acid-mediated epithelial-mesenchymal transition of lens epithelial cells, and that TGF-ß2 in epithelial-mesenchymal transition is regulated by CD44. These results suggest that CD44 could be used as a target for preventing hyaluronic acid-induced posterior capsule opacification. Our findings suggest that CD44/TGF-ß2 is crucial for the hyaluronic acid-induced epithelial-mesenchymal transition of lens epithelial cells.
Sujet(s)
Mouvement cellulaire , Cellules épithéliales , Transition épithélio-mésenchymateuse , Antigènes CD44 , Acide hyaluronique , Cristallin , Facteur de croissance transformant bêta-2 , Humains , Transition épithélio-mésenchymateuse/effets des médicaments et des substances chimiques , Transition épithélio-mésenchymateuse/physiologie , Acide hyaluronique/pharmacologie , Antigènes CD44/métabolisme , Facteur de croissance transformant bêta-2/pharmacologie , Facteur de croissance transformant bêta-2/métabolisme , Cellules épithéliales/effets des médicaments et des substances chimiques , Cellules épithéliales/métabolisme , Cristallin/cytologie , Cristallin/effets des médicaments et des substances chimiques , Cristallin/métabolisme , Mouvement cellulaire/effets des médicaments et des substances chimiques , Survie cellulaire/effets des médicaments et des substances chimiques , Stress oxydatif/effets des médicaments et des substances chimiques , Stress oxydatif/physiologie , Technique de Western , Opacification de la capsule postérieure/métabolisme , Opacification de la capsule postérieure/anatomopathologie , Réaction de polymérisation en chaine en temps réel , Cytométrie en flux , Immunohistochimie , Cellules cultivéesRÉSUMÉ
The clinical utility of chemotherapy is often compromised by its limited efficacy and significant side effects. Addressing these concerns, we have developed a self-assembled nanomicelle, namely SANTA FE OXA, which consists of hyaluronic acid (HA) conjugated with ferrocene methanol (FC), oxaliplatin prodrug (OXA(IV)) and ethylene glycol-coupled linoleic acid (EG-LA). Targeted delivery is achieved by HA binding to the CD44 receptors that are overexpressed on tumor cells, facilitating drug uptake. Once internalized, hyaluronidase (HAase) catalyzes the digestion of the SANTA FE OXA, releasing FC and reducing OXA(IV) into an active form. The active oxaliplatin (OXA) induces DNA damage and increases intracellular hydrogen peroxide (H2O2) levels via cascade reactions. Simultaneously, FC disrupts the redox balance within tumor cells, inducing ferroptosis. Both in vivo and in vitro experiments confirmed that SANTA FE OXA inhibited tumor growth by combining cascade chemotherapy and self-sensitized ferroptosis, achieving a tumor inhibition rate of up to 76.61 %. Moreover, this SANTA FE OXA significantly mitigates the systemic toxicity commonly associated with platinum-based chemotherapeutics. Our findings represent a compelling advancement in nanomedicine for enhanced cascade cancer therapy.
Sujet(s)
Antinéoplasiques , Ferroptose , Composés du fer II , Acide hyaluronique , Micelles , Oxaliplatine , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Ferroptose/effets des médicaments et des substances chimiques , Oxaliplatine/pharmacologie , Oxaliplatine/composition chimique , Humains , Animaux , Antinéoplasiques/pharmacologie , Antinéoplasiques/composition chimique , Souris , Lignée cellulaire tumorale , Composés du fer II/composition chimique , Composés du fer II/pharmacologie , Métallocènes/composition chimique , Métallocènes/pharmacologie , Promédicaments/pharmacologie , Promédicaments/composition chimique , Acide linoléique/composition chimique , Acide linoléique/pharmacologie , Souris de lignée BALB C , Femelle , Souris nude , Peroxyde d'hydrogène/composition chimique , Peroxyde d'hydrogène/pharmacologie , Tumeurs/traitement médicamenteuxRÉSUMÉ
Three-dimensional (3D) bioprinting culture models capable of reproducing the pathological architecture of diseases are increasingly advancing. In this study, 3D scaffolds were created using extrusion-based bioprinting method with alginate, gelatin, and hyaluronic acid to investigate the effects of hyaluronic acid on the physical properties of the bioscaffold as well as on the formation of liver cancer spheroids. Conformational analysis, rheological characterization, and swelling-degradation tests were performed to characterize the scaffolds. After generating spheroids from hepatocellular carcinoma cells on the 3D scaffolds, cell viability and proliferation assays were performed. Flow cytometry and immunofluorescence microscopy were used into examine the expression of albumin, CD44, and E-cadherin to demonstrate functional capability and maturation levels of the spheroid-forming cells. The results show that hyaluronic acid in the scaffolds correlates with spheroid formation and provides high survival rates. It is also associated with an increase in CD44 expression and a decrease in E-cadherin, while there is no significant change in the albumin expression in the cells. Overall, the findings demonstrate that hyaluronic acid in a 3D hydrogel scaffold supports spheroid formation and may induce stemness. We present a promising 3D scaffold model for enhancing liver cancer spheroid formation and mimicking solid tumors. This model also has the potential for further studies to examine stem cell properties in 3D models.
Sujet(s)
Antigènes CD44 , Acide hyaluronique , Cellules souches tumorales , Sphéroïdes de cellules , Structures d'échafaudage tissulaires , Acide hyaluronique/pharmacologie , Acide hyaluronique/composition chimique , Humains , Sphéroïdes de cellules/effets des médicaments et des substances chimiques , Sphéroïdes de cellules/métabolisme , Cellules souches tumorales/métabolisme , Cellules souches tumorales/effets des médicaments et des substances chimiques , Cellules souches tumorales/anatomopathologie , Structures d'échafaudage tissulaires/composition chimique , Antigènes CD44/métabolisme , Tumeurs du foie/anatomopathologie , Tumeurs du foie/métabolisme , Survie cellulaire/effets des médicaments et des substances chimiques , Cadhérines/métabolisme , Prolifération cellulaire/effets des médicaments et des substances chimiques , Bio-impression/méthodes , Carcinome hépatocellulaire/anatomopathologie , Carcinome hépatocellulaire/métabolisme , Lignée cellulaire tumorale , Gélatine/composition chimique , Hydrogels/composition chimique , Hydrogels/pharmacologieRÉSUMÉ
Regeneration of hyaline cartilage in human-sized joints remains a clinical challenge, and it is a critical unmet need that would contribute to longer healthspans. Injectable scaffolds for cartilage repair that integrate both bioactivity and sufficiently robust physical properties to withstand joint stresses offer a promising strategy. We report here on a hybrid biomaterial that combines a bioactive peptide amphiphile supramolecular polymer that specifically binds the chondrogenic cytokine transforming growth factor ß-1 (TGFß-1) and crosslinked hyaluronic acid microgels that drive formation of filament bundles, a hierarchical motif common in natural musculoskeletal tissues. The scaffold is an injectable slurry that generates a porous rubbery material when exposed to calcium ions once placed in cartilage defects. The hybrid material was found to support in vitro chondrogenic differentiation of encapsulated stem cells in response to sustained delivery of TGFß-1. Using a sheep model, we implanted the scaffold in shallow osteochondral defects and found it can remain localized in mechanically active joints. Evaluation of resected joints showed significantly improved repair of hyaline cartilage in osteochondral defects injected with the scaffold relative to defects injected with the growth factor alone, including implantation in the load-bearing femoral condyle. These results demonstrate the potential of the hybrid biomimetic scaffold as a niche to favor cartilage repair in mechanically active joints using a clinically relevant large-animal model.
Sujet(s)
Chondrogenèse , Structures d'échafaudage tissulaires , Facteur de croissance transformant bêta-1 , Animaux , Structures d'échafaudage tissulaires/composition chimique , Ovis , Facteur de croissance transformant bêta-1/métabolisme , Chondrogenèse/effets des médicaments et des substances chimiques , Polymères/composition chimique , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Cartilage articulaire/effets des médicaments et des substances chimiques , Régénération/effets des médicaments et des substances chimiques , Différenciation cellulaire/effets des médicaments et des substances chimiques , Ingénierie tissulaire/méthodes , Humains , Matériaux biocompatibles/composition chimique , Chondrocytes/effets des médicaments et des substances chimiques , Cartilage hyalin/métabolismeRÉSUMÉ
Although minimally invasive interventional occluders can effectively seal heart defect tissue, they still have some limitations, including poor endothelial healing, intense inflammatory response, and thrombosis formation. Herein, a polyphenol-reinforced medicine/peptide glycocalyx-like coating was prepared on cardiac occluders. A coating consisting of carboxylated chitosan, epigallocatechin-3-gallate (EGCG), tanshinone IIA sulfonic sodium (TSS), and hyaluronic acid grafted with 3-aminophenylboronic acid was prepared. Subsequently, the mercaptopropionic acid-GGGGG-Arg-Glu-Asp-Val peptide was grafted by the thiol-ene "click" reaction. The coating showed good hydrophilicity and free radical-scavenging ability and could release EGCG-TSS. The results of biological experiments suggested that the coating could reduce thrombosis by promoting endothelialization, and promote myocardial repair by regulating the inflammatory response. The functions of regulating cardiomyocyte apoptosis and metabolism were confirmed, and the inflammatory regulatory functions of the coating were mainly dependent on the NF-kappa B and TNF signaling pathway.
Sujet(s)
Glycocalyx , Hydrogels , Polyphénols , Animaux , Hydrogels/composition chimique , Hydrogels/pharmacologie , Polyphénols/composition chimique , Polyphénols/pharmacologie , Glycocalyx/métabolisme , Glycocalyx/composition chimique , Glycocalyx/effets des médicaments et des substances chimiques , Immunomodulation/effets des médicaments et des substances chimiques , Régénération/effets des médicaments et des substances chimiques , Myocytes cardiaques/effets des médicaments et des substances chimiques , Myocytes cardiaques/métabolisme , Rats , Apoptose/effets des médicaments et des substances chimiques , Souris , Myocarde/métabolisme , Catéchine/composition chimique , Catéchine/analogues et dérivés , Catéchine/pharmacologie , Rat Sprague-Dawley , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , MâleRÉSUMÉ
Corneal defects can lead to stromal scarring and vision loss, which is currently only treatable with a cadaveric corneal transplant. Although in situ-forming hydrogels have been shown to foster regeneration of the cornea in the setting of stromal defects, the cross-linking, biomechanical, and compositional parameters that optimize healing have not yet been established. This, Corneal defects are also almost universally inflamed, and their rapid closure without fibrosis are critical to preserving vision. Here, an in situ forming, bioorthogonally cross-linked, nanocluster (NC)-reinforced collagen and hyaluronic acid hydrogel (NCColHA hydrogel) with enhanced structural integrity and both pro-regenerative and anti-inflammatory effects was developed and tested within a corneal defect model in vivo. The NCs serve as bioorthogonal nanocross-linkers, providing higher cross-linking density than polymer-based alternatives. The NCs also serve as delivery vehicles for prednisolone (PRD) and the hepatocyte growth factor (HGF). NCColHA hydrogels rapidly gel within a few minutes upon administration and exhibit robust rheological properties, excellent transparency, and negligible swelling/deswelling behavior. The hydrogel's biocompatibility and capacity to support cell growth were assessed using primary human corneal epithelial cells. Re-epithelialization on the NCColHA hydrogel was clearly observed in rabbit eyes, both ex vivo and in vivo, with expression of normal epithelial biomarkers, including CD44, CK12, CK14, α-SMA, Tuj-1, and ZO-1, and stratified, multilayered morphology. The applied hydrogel maintained its structural integrity for at least 14 days and remodeled into a transparent stroma by 56 days.
Sujet(s)
Hydrogels , Hydrogels/composition chimique , Hydrogels/pharmacologie , Animaux , Lapins , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Cornée/effets des médicaments et des substances chimiques , Régénération/effets des médicaments et des substances chimiques , Humains , Réactifs réticulants/composition chimique , Collagène/composition chimique , Facteur de croissance des hépatocytes/pharmacologie , Facteur de croissance des hépatocytes/métabolisme , Facteur de croissance des hépatocytes/composition chimiqueRÉSUMÉ
Inflammation is the body's response to injuries, which depends on numerous regulatory factors. Among them, miRNAs have gained much attention for their role in regulating inflammatory gene expression at multiple levels. In particular, miR-21 is up-regulated during the inflammatory response and reported to be involved in the resolution of inflammation by down-regulating pro-inflammatory mediators, including MyD88. Herein, we evaluated the regulatory effects of miR-21 on the TLR-4/MyD88 pathway in an in vitro model of 6-mer HA oligosaccharides-induced inflammation in human chondrocytes. The exposition of chondrocytes to 6-mer HA induced the activation of the TLR4/MyD88 pathway, which culminates in NF-kB activation. Changes in miR-21, TLR-4, MyD88, NLRP3 inflammasome, IL-29, Caspase1, MMP-9, iNOS, and COX-2 mRNA expression of 6-mer HA-stimulated chondrocytes were examined by qRT-PCR. Protein amounts of TLR-4, MyD88, NLRP3 inflammasome, p-ERK1/2, p-AKT, IL-29, caspase1, MMP-9, p-NK-kB p65 subunit, and IKB-a have been evaluated by ELISA kits. NO and PGE2 levels have been assayed by colorimetric and ELISA kits, respectively. HA oligosaccharides induced a significant increase in the expression of the above parameters, including NF-kB activity. The use of a miR-21 mimic attenuated MyD88 expression levels and the downstream effectors. On the contrary, treatment with a miR-21 inhibitor induced opposite effects. Interestingly, the use of a MyD88 siRNA confirmed MyD88 as the target of miR-21 action. Our results suggest that miR-21 expression could increase in an attempt to reduce the inflammatory response, targeting MyD88.
Sujet(s)
Chondrocytes , Acide hyaluronique , Inflammation , microARN , Facteur de différenciation myéloïde-88 , Oligosaccharides , Humains , Facteur de différenciation myéloïde-88/métabolisme , Facteur de différenciation myéloïde-88/génétique , microARN/génétique , microARN/métabolisme , Chondrocytes/métabolisme , Chondrocytes/effets des médicaments et des substances chimiques , Acide hyaluronique/pharmacologie , Acide hyaluronique/métabolisme , Inflammation/métabolisme , Inflammation/génétique , Oligosaccharides/pharmacologie , Récepteur de type Toll-4/métabolisme , Récepteur de type Toll-4/génétique , Transduction du signal/effets des médicaments et des substances chimiques , Protéine-3 de la famille des NLR contenant un domaine pyrine/métabolisme , Protéine-3 de la famille des NLR contenant un domaine pyrine/génétique , Facteur de transcription NF-kappa B/métabolisme , Cellules cultivéesRÉSUMÉ
BACKGROUND: Long-term anti-angiogenesis leads to pruned vasculature, densely deposited extracellular matrix (ECM), and consequently reduced chemotherapy delivery in esophagogastric cancer (EGC). To address this issue, we evaluated the efficacy of adding a hyaluronidase or a NO-donor to the regimen of chemotherapy and anti-angiogenic drugs. METHODS: A patient-derived EGC xenograft model was developed. Grafted mice were randomly assigned to four experimental groups and one control group. The experimental groups received DC101, a murine angiogenesis inhibitor, and nab-paclitaxel (NPTX), with the addition of hyaluronidase (PEGPH20), or NO-donor (nitroglycerine, NTG), or their combination, respectively. We compared tumor growth during 17 days of treatment. We performed immunohistochemistry for ECM components hyaluronan (HA) and collagen, CD31 for endothelial cells, and γH2AX for DNA damage. The positively stained areas were quantified, and vessel diameters were measured using QuPath software. RESULTS: Prolonged DC101 treatment induced deposition of HA (p<0.01) and collagen (p<0.01). HA was effectively degraded by PEGPH20 (p<0.001), but not by NTG as expected. Both PEGPH20 (p<0.05) and NTG (p<0.01) dilated vessels collapsed in response to long-term DC101 treatment. However, only PEGPH20 (rather than NTG) was found to significantly inhibit tumor growth (p<0.05) in combination with NPTX and DC101. CONCLUSIONS: These findings suggest that the mechanical barrier of HA is the major reason responsible for the resistance developed during prolonged anti-angiogenesis in EGC. Incorporating PEGPH20 into the existing treatment regimen is promising to improve outcomes for patients with EGC.
Sujet(s)
Albumines , Inhibiteurs de l'angiogenèse , Tumeurs de l'oesophage , Hyaluronoglucosaminidase , Néovascularisation pathologique , Paclitaxel , Tumeurs de l'estomac , Tests d'activité antitumorale sur modèle de xénogreffe , Animaux , Paclitaxel/pharmacologie , Paclitaxel/administration et posologie , Paclitaxel/usage thérapeutique , Hyaluronoglucosaminidase/administration et posologie , Tumeurs de l'oesophage/traitement médicamenteux , Tumeurs de l'oesophage/anatomopathologie , Humains , Inhibiteurs de l'angiogenèse/pharmacologie , Inhibiteurs de l'angiogenèse/administration et posologie , Tumeurs de l'estomac/traitement médicamenteux , Tumeurs de l'estomac/anatomopathologie , Albumines/pharmacologie , Albumines/administration et posologie , Néovascularisation pathologique/traitement médicamenteux , Néovascularisation pathologique/anatomopathologie , Souris , Acide hyaluronique/pharmacologie , Souris nude , Femelle , , Anticorps monoclonauxRÉSUMÉ
Hyaluronic acid injection is commonly used clinically to slow down the development of osteoarthritis (OA). A newly developed therapeutic method is to implant chondrocytes/stem cells to regenerate cartilage in the body. The curative effect of stem cell therapy has been proven to come from the paracrine of stem cells. In this study, exosomes secreted by stem cells from human exfoliated deciduous teeth (SHED) and hyaluronic acid were used individually to evaluate the therapeutic effect in slowing down OA. SHED was cultured in a serum-free medium for three days, and the supernatant was collected and then centrifuged with a speed difference to obtain exosomes containing CD9 and CD63 markers, with an average particle size of 154.1 nm. SW1353 cells were stimulated with IL-1ß to produce the inflammatory characteristics of OA and then treated with 40 µg/mL exosomes and hyaluronic acid individually. The results showed that the exosomes successfully inhibited the pro-inflammatory factors, including TNF-α, IL-6, iNOS, NO, COX-2 and PGE2, induced by IL-1ß and the degrading enzyme of the extrachondral matrix (MMP-13). Collagen II and ACAN, the main components of the extrachondral matrix, were also increased by 1.76-fold and 2.98-fold, respectively, after treatment, which were similar to that of the normal joints. The effect can be attributed to the partial mediation of SHED exosomes to the NF-κB pathway, and the ability of exosomes to inhibit OA is found not inferior to that of hyaluronic acid.
Sujet(s)
Exosomes , Acide hyaluronique , Arthrose , Cellules souches , Dent de lait , Humains , Exosomes/métabolisme , Dent de lait/cytologie , Dent de lait/métabolisme , Arthrose/métabolisme , Arthrose/thérapie , Arthrose/anatomopathologie , Acide hyaluronique/métabolisme , Acide hyaluronique/pharmacologie , Cellules souches/métabolisme , Inflammation/métabolisme , Inflammation/anatomopathologie , Interleukine-1 bêta/métabolisme , Chondrocytes/métabolismeRÉSUMÉ
BACKGROUND: Bone loss of residual alveolar ridges is a great challenge in the field of dental implantology. Deproteinized bovine bone mineral (DBBM) is commonly used for bone regeneration, however, it is loose and difficult to handle in clinical practice. Hyaluronic acid (HA) shows viscoelasticity, permeability and excellent biocompatibility. The aim of this study is to evaluate whether high-molecular-weight (MW) HA combined with DBBM could promote new bone formation in rat calvarial critical size defects (CSDs). MATERIALS AND METHODS: Rat calvarial CSDs (5 mm in diameter) were created. Rats (n = 45) were randomly divided into 3 groups: HA-DBBM compound grafting group, DBBM particles only grafting group and no graft group. Defect healing was assessed by hematoxylin-eosin staining and histomorphometry 2, 4 and 8 weeks postop, followed by Micro-CT scanning 8 weeks postop. Statistical analyses were performed by ANOVA followed by Tukey's post hoc test with P < 0.05 indicating statistical significance. RESULTS: All rats survived after surgery. Histomorphometric evaluation revealed that at 2, 4 and 8 weeks postop, the percentage of newly formed bone was significantly greater in HA-DBBM compound grafting group than in the other two groups. Consistently, Micro-CT assessment revealed significantly more trabecular bone (BV/TV and Tb.N) in HA-DBBM compound group than in the other two groups, respectively (P < 0.05). Moreover, the trabecular bone was significantly more continuous (Tb.Pf) in HA-DBBM compound group than in the other two groups, respectively (P < 0.05). CONCLUSION: HA not only significantly promoted new bone formation in rats calvarial CSDs but also improved the handling ability of DBBM.
Sujet(s)
Régénération osseuse , Substituts osseux , Acide hyaluronique , Ostéogenèse , Crâne , Microtomographie aux rayons X , Animaux , Acide hyaluronique/pharmacologie , Acide hyaluronique/usage thérapeutique , Rats , Crâne/chirurgie , Crâne/imagerie diagnostique , Crâne/anatomopathologie , Substituts osseux/usage thérapeutique , Substituts osseux/pharmacologie , Ostéogenèse/effets des médicaments et des substances chimiques , Régénération osseuse/effets des médicaments et des substances chimiques , Mâle , Rat Sprague-Dawley , Répartition aléatoire , BovinsRÉSUMÉ
Hyaluronic acid (HA), as an extracellular matrix, is known to promote wound healing, and its bioactivity is affected by molecular weight. However, the mechanism of LMW-HA on cells migration remains unclear. In this study, we investigated the effect of LMW-HA on cells migration and the underlying mechanism by employing proteomics. The scratch assay showed that LMW-HA can significantly enhance the migration of keratinocytes in vitro, and ten differentially expressed proteins (DEPs) were found to be associated with wound healing through proteomics and network pharmacology. The result of bioinformatic analysis indicated that these DEPs are involved in positive regulation of cell motility and cellular component movement. Moreover, protein targets of key pathways were further validated. The findings suggest that LMW-HA can promote wound healing by accelerating epithelization via the HIF-1α/VEGF pathway, which provides new insight and reference for HA to enhance cells migration.
Sujet(s)
Mouvement cellulaire , Acide hyaluronique , Kératinocytes , Masse moléculaire , Protéomique , Cicatrisation de plaie , Acide hyaluronique/pharmacologie , Mouvement cellulaire/effets des médicaments et des substances chimiques , Kératinocytes/effets des médicaments et des substances chimiques , Protéomique/méthodes , Humains , Cicatrisation de plaie/effets des médicaments et des substances chimiques , Sous-unité alpha du facteur-1 induit par l'hypoxie/métabolisme , Facteur de croissance endothéliale vasculaire de type A/métabolisme , Transduction du signal/effets des médicaments et des substances chimiquesRÉSUMÉ
We addressed the damage caused by internal and external factors on the skin, as well as the aging phenomenon caused by delayed repair after damage. We prepared supramolecular hyaluronic acid-ectoin (HA-ECT) by combining theoretical calculations and experimental research, using intermolecular forces between hyaluronic acid and ectoin. This supramolecule has good stability, safety, and skin permeability and can penetrate the stratum corneum of the skin, reaching the epidermis and dermis of the skin. Compared with ectoin, the permeability of the supramolecule HA-ECT was 3.39-fold higher. Supramolecular HA-ECT can promote the proliferation of keratinocytes and fibroblasts, significantly increase the content of type collagen-I, reduce the expression of inflammatory factors in keratinocytes, and enhance skin hydration and repair effects. HA-ECT can reduce intracellular reactive oxygen species and inhibit the expression of matrix metalloproteinase-1 (reduced by 1.27-fold) to improve skin photoaging. Therefore, supramolecular HA-ECT has potential application in the field of cosmetics for skin antioxidants, anti-aging, and repair.
Sujet(s)
Antioxydants , Acide hyaluronique , Peau , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Antioxydants/pharmacologie , Antioxydants/composition chimique , Humains , Peau/effets des médicaments et des substances chimiques , Peau/métabolisme , Animaux , Anti-inflammatoires/pharmacologie , Anti-inflammatoires/composition chimique , Espèces réactives de l'oxygène/métabolisme , Prolifération cellulaire/effets des médicaments et des substances chimiques , Kératinocytes/effets des médicaments et des substances chimiques , Kératinocytes/métabolisme , Fibroblastes/effets des médicaments et des substances chimiques , SourisRÉSUMÉ
Wound healing is a complex process involving a complicated interplay between numerous cell types and vascular systems. Hyaluronic acid (HA)-based hydrogel facilitates wound healing, and is involved in all processes. However, slow gelation speed and weak adhesion strength limit its ability to form a stable physical barrier quickly. Herein, we propose a HA-based composite hydrogel as the wound dressing based on oxidative coupling reaction. Tannic acid and dopamine-coated carbon particles (DCPs) containing abundant phenolic hydroxyl groups are incorporated into the HA-based hydrogel for increasing the number of crosslinking sites of oxidative coupling of the hydrogel and enhancing adhesion through the formation of covalent bonds and hydrogen bonds between hydrogel and wound sites. The composite hydrogel exhibits short gelation time (<6 s) and high adhesion strength (>8.1 kPa), which are superior to the references and commercial products of its kind. The in vitro experiments demonstrate that the hydrogel has low hemolytic reaction, negligible cytotoxicity, and the ability to promote fibroblast proliferation and migration. The in vivo full-thickness skin defect model experiments demonstrate that the hydrogel can accelerate wound healing under mild photothermal stimulation of DCPs by reducing inflammation, relieving tissue hypoxia, and promoting angiogenesis and epithelialization.
Sujet(s)
Acide hyaluronique , Hydrogels , Polyphénols , Tanins , Cicatrisation de plaie , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Cicatrisation de plaie/effets des médicaments et des substances chimiques , Tanins/composition chimique , Tanins/pharmacologie , Animaux , Hydrogels/composition chimique , Hydrogels/pharmacologie , Souris , Polyphénols/composition chimique , Polyphénols/pharmacologie , Prolifération cellulaire/effets des médicaments et des substances chimiques , Humains , Peau/effets des médicaments et des substances chimiques , Fibroblastes/effets des médicaments et des substances chimiques , Mouvement cellulaire/effets des médicaments et des substances chimiques , MâleRÉSUMÉ
This study aims to investigate the molecular mechanisms and the neuroprotective effect of hyaluronic acid modified verapamil-loaded carbon quantum dots (VRH-loaded HA-CQDs) against an in-vitro Alzheimer's disease model induced by amyloid beta (Aß) in SH-SY5Y and Neuro 2a neuroblastoma cells. Briefly, different HA-CQDs were prepared using hydrothermal method and optimized by Box-Behnken design to maximize quantum yield and minimize particle size. Serum stable negatively charged VRH-loaded HA-CQDs was successfully prepared by admixing the optimized HA-CQDs and VRH with association efficiency and loading capacity of 81.25 ± 3.65 % and 5.11 ± 0.81 %, respectively. Cells were pretreated with VRH solution or loaded-HA-CQDs followed by exposure to Aß. Compared to the control group, amyloidosis led to reduction in cellular proliferation, mitochondrial membrane potential, expression of cytochrome P450, cytochrome c oxidase, CREB-regulated transcriptional coactivator 3, and mitotic index, along with marked increase in reactive oxygen species (ROS) and inflammatory cytokines. Pretreatment with VRH, either free or loaded HA-CQDs, enhanced cell survival, mitochondrial membrane potential, mitotic index, and gene expression. It also reduced inflammation and ROS. However, VRH-loaded HA-CQDs exhibited superior effectiveness in the measured parameters. These findings suggest that VRH-loaded HA-CQDs have enhanced therapeutic potential compared to free VRH in mitigating amyloidosis negative features.
Sujet(s)
Maladie d'Alzheimer , Peptides bêta-amyloïdes , Carbone , Acide hyaluronique , Neuroprotecteurs , Boîtes quantiques , Espèces réactives de l'oxygène , Vérapamil , Maladie d'Alzheimer/traitement médicamenteux , Maladie d'Alzheimer/métabolisme , Boîtes quantiques/composition chimique , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Humains , Neuroprotecteurs/pharmacologie , Neuroprotecteurs/composition chimique , Carbone/composition chimique , Carbone/pharmacologie , Vérapamil/pharmacologie , Peptides bêta-amyloïdes/métabolisme , Lignée cellulaire tumorale , Espèces réactives de l'oxygène/métabolisme , Potentiel de membrane mitochondriale/effets des médicaments et des substances chimiques , Survie cellulaire/effets des médicaments et des substances chimiques , Prolifération cellulaire/effets des médicaments et des substances chimiques , AnimauxRÉSUMÉ
Pancreatic cancer cells highly resistance to conventional chemo drugs, resulting low survival rates. The aim of the study was to design and develop dual targeting polymersomes (DTPS) loaded with phyto alkaloid agent i.e., piperlongumine (PL) for effective pancreatic cancer treatment. Here, hyaluronic acid (HA) was functionalized with 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (DSPEPEG-NH2), poly(ethylene glycol) bis (amine) (PEG), and phenylboronic acid (PBA) moieties. The designed DTPS could selectively recognize CD44/sialic acid (SA) and deliver PL to MIA PaCa-2 pancreatic cancer cells, facilitated via HA-CD44 and PBA-SA interactions. Drug release and stability results implied sustained PL release profile and pH sensitivity. DTPS could be more efficiently bound with SA than other sugars based on fluorescence spectroscopy. The anticancer efficacy of designed polymersomes was tested with H6C7 normal pancreas cells and SA/CD44-overexpressed MIA PaCa-2 pancreatic cancer cells. DTPS showed both SA and CD44-mediated higher cellular uptake while single-targeted polymersomes showed CD44-mediated cellular uptake. The PL-loaded DTPS efficiently uptake by MIA PaCa-2 cancer cells, causing up to 80 % cell growth inhibition, reduced cell spheroids volume and increased dead cells by 58.3 %. These results indicate that the newly developed DTPS can effectively serve as a pH-responsive drug delivery system for efficient treatment of cancer.
Sujet(s)
Acides boroniques , Dioxolanes , Acide hyaluronique , Tumeurs du pancréas , Humains , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Tumeurs du pancréas/traitement médicamenteux , Tumeurs du pancréas/anatomopathologie , Tumeurs du pancréas/métabolisme , Dioxolanes/pharmacologie , Dioxolanes/composition chimique , Lignée cellulaire tumorale , Acides boroniques/composition chimique , Acides boroniques/pharmacologie , Antinéoplasiques/pharmacologie , Antinéoplasiques/composition chimique , Libération de médicament , Antigènes CD44/métabolisme , Vecteurs de médicaments/composition chimique , Systèmes de délivrance de médicaments , Polymères/composition chimique , Survie cellulaire/effets des médicaments et des substances chimiques , PipéridonesRÉSUMÉ
pH could play vital role in the wound healing process due to the bacterial metabolites, which is one essential aspect of desirable wound dressings lies in being pH-responsive. This work has prepared a degradable hyaluronic acid hydrogel dressing with wound pH response-ability. The aldehyde-modified hyaluronic acid (AHA) was obtained, followed by complex mixture formation of eugenol and oregano antibacterial essential oil in the AHA-CMCS hydrogel through the Schiff base reaction with carboxymethyl chitosan (CMCS). This hydrogel composite presents pH-responsiveness, its disintegration mass in acidic environment (pH = 5.5) is 4 times that of neutral (pH = 7.2), in which the eugenol release rate increases from 37.6 % to 82.1 %. In vitro antibacterial and in vivo wound healing investigations verified that hydrogels loaded with essential oils have additional 5 times biofilm removal efficiency, and significantly accelerate wound healing. Given its excellent anti-biofilm and target-release properties, the broad application of this hydrogel in bacteria-associated wound management is anticipated.
Sujet(s)
Antibactériens , Biofilms , Acide hyaluronique , Hydrogels , Huile essentielle , Cicatrisation de plaie , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Hydrogels/composition chimique , Hydrogels/pharmacologie , Cicatrisation de plaie/effets des médicaments et des substances chimiques , Biofilms/effets des médicaments et des substances chimiques , Huile essentielle/pharmacologie , Huile essentielle/composition chimique , Concentration en ions d'hydrogène , Animaux , Antibactériens/pharmacologie , Antibactériens/composition chimique , Chitosane/composition chimique , Chitosane/analogues et dérivés , Chitosane/pharmacologie , Staphylococcus aureus/effets des médicaments et des substances chimiques , Tests de sensibilité microbienne , BandagesRÉSUMÉ
Myocardial infarction (MI) is a serious cardiovascular disease with complex complications and high lethality. Currently, exosome (Exo) therapy has emerged as a promising treatment of ischemic MI due to its antioxidant, anti-inflammatory, and vascular abilities. However, traditional Exo delivery lacks spatiotemporal precision and targeting of microenvironment modulation, making it difficult to localize the lesion site for sustained effects. In this study, an injectable oxidized hyaluronic acid-polylysine (OHA-PL) hydrogel was developed to conveniently load adipose-derived mesenchymal stem cell exosomes (ADSC-Exos) and improve their retention under physiological conditions. The OHA-PL@Exo hydrogel with high spatiotemporal precision is transplanted minimally invasively into the ischemic myocardium to scavenge intracellular and extracellular reactive oxygen species, regulate macrophage polarization, and attenuate inflammation in the early phase of MI. In addition, this synergistic microenvironment modulation can effectively reduce myocardial fibrosis and ventricular remodeling, promote angiogenesis, and restore electrophysiological function in the late stage of MI. Therefore, this hyaluronic acid-polylysine to deliver exosomes has become a promising therapeutic strategy for myocardial repair.
Sujet(s)
Exosomes , Acide hyaluronique , Hydrogels , Inflammation , Stress oxydatif , Polylysine , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Exosomes/métabolisme , Polylysine/composition chimique , Polylysine/pharmacologie , Polylysine/analogues et dérivés , Hydrogels/composition chimique , Animaux , Stress oxydatif/effets des médicaments et des substances chimiques , Inflammation/traitement médicamenteux , Inflammation/métabolisme , Infarctus du myocarde/traitement médicamenteux , Infarctus du myocarde/métabolisme , Infarctus du myocarde/thérapie , Cellules souches mésenchymateuses/métabolisme , Cellules souches mésenchymateuses/effets des médicaments et des substances chimiques , Cellules souches mésenchymateuses/cytologie , Souris , Microenvironnement cellulaire/effets des médicaments et des substances chimiques , Mâle , Myocarde/métabolisme , Myocarde/anatomopathologie , Injections , Espèces réactives de l'oxygène/métabolismeRÉSUMÉ
Hyaluronic acid (HA), a major component of skin extracellular matrix, provides an excellent framework for hemostatic design; however, there still lacks HA materials tailored with superior mechanical properties to address non-compressible hemorrhages. Here, we present a solvent-free thermal approach for constructing a shape-memory HA sponge for this application. Following facile thermal incubation around 130 °C, HA underwent cross-linking via esterification with poly(acrylic acid) within the sponge pre-shaped through a prior freeze-drying process. The resulting sponge system exhibited extensively interconnected macropores with a high fluid absorption capacity, excellent shape-memory property, and robust mechanical elasticity. When introduced to whole blood in vitro, the HA sponges demonstrated remarkable hemostatic properties, yielding a shorter coagulation time and lower blood clotting index compared to the commercial gelatin sponge (GS). Furthermore, in vivo hemostatic studies involving two non-compressible hemorrhage models (rat liver volume defect injury or femoral artery injury) achieved a significant reduction of approximately 64% (or 56%) and 73% (or 70%) in bleeding time and blood loss, respectively, which also outperformed GS. Additionally, comprehensive in vitro and in vivo evaluations suggested the good biocompatibility and biodegradability of HA sponges. This study highlights the substantial potential for utilizing the designed HA sponges in massive bleeding management.
Sujet(s)
Hémorragie , Acide hyaluronique , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Animaux , Hémorragie/traitement médicamenteux , Rats , Hémostatiques/composition chimique , Hémostatiques/pharmacologie , Température , Matériaux biocompatibles/composition chimique , Matériaux biocompatibles/pharmacologie , Coagulation sanguine/effets des médicaments et des substances chimiques , Mâle , Porosité , Rat Sprague-DawleyRÉSUMÉ
Plasma cells (PCs) in bone marrow (BM) play an important role in both protective and pathogenic humoral immune responses, e.g. in various malignant and non-malignant diseases such as multiple myeloma, primary and secondary immunodeficiencies and autoimmune diseases. Dedicated microenvironmental niches in the BM provide PCs with biomechanical and soluble factors that support their long-term survival. There is a high need for appropriate and robust model systems to better understand PCs biology, to develop new therapeutic strategies for PCs-related diseases and perform targeted preclinical studies with high predictive value. Most preclinical data have been derived fromin vivostudies in mice, asin vitrostudies of human PCs are limited due to restricted survival and functionality in conventional 2D cultures that do not reflect the unique niche architecture of the BM. We have developed a microphysiological, dynamic 3D BM culture system (BM-MPS) based on human primary tissue (femoral biopsies), mechanically supported by a hydrogel scaffold casing. While a bioinert agarose casing did not support PCs survival, a photo-crosslinked collagen-hyaluronic acid (Col-HA) hydrogel preserved the native BM niche architecture and allowed PCs survivalin vitrofor up to 2 weeks. Further, the Col-HA hydrogel was permissive to lymphocyte migration into the microphysiological system´s circulation. Long-term PCs survival was related to the stable presence in the culture of soluble factors, as APRIL, BAFF, and IL-6. Increasing immunoglobulins concentrations in the medium confirm their functionality over culture time. To the best of our knowledge, this study is the first report of successful long-term maintenance of primary-derived non-malignant PCsin vitro. Our innovative model system is suitable for in-depthin vitrostudies of human PCs regulation and exploration of targeted therapeutic approaches such as CAR-T cell therapy or biologics.
Sujet(s)
Hydrogels , Plasmocytes , Humains , Plasmocytes/cytologie , Plasmocytes/métabolisme , Hydrogels/composition chimique , Survie cellulaire/effets des médicaments et des substances chimiques , Acide hyaluronique/composition chimique , Acide hyaluronique/pharmacologie , Cellules de la moelle osseuse/cytologie , Collagène/composition chimique , Moelle osseuse/métabolisme , Cellules cultivées , Techniques de cultures cellulaires tridimensionnelles , Modèles biologiques , Structures d'échafaudage tissulaires/composition chimique , Agarose/composition chimiqueRÉSUMÉ
Intrinsic and extrinsic factors, including lifestyle and sun exposure, can contribute to cell senescence, which impairs skin homeostasis, that may in turn lead to skin aging. Senescent cells have a specific secretome, called the senescence-associated secretory phenotype (SASP) that includes MMPs, CXCLs and S100A8/9. Reducing the SASP with senotherapeutics is a promising strategy to reduce skin aging. Here we evaluated the effect of a formula containing niacinamide and hyaluronic acid, which are known to limit senescence and skin aging. We conducted three different studies. (1) Ex vivo explants treated with the formula had more collagen and glycosaminoglycan. (2) In a clinical trial with forty-four women, two months of treatment improved fine lines, wrinkles, luminosity, smoothness, homogeneity, and plumpness. (3) In a third study on thirty women, we treated one arm for two months and took skin biopsies to study gene expression. 101 mRNAs and 13 miRNAs were differentially expressed. We observed a likely senomorphic effect, as there was a decrease in many SASP genes including MMP12 and CXCL9 and a significant downregulation of autocrine signaling genes: S100A8 and S100A9. These pharmaco-clinical results are the first to demonstrate the senomorphic properties of an effective anti-aging formula in skin.