: We straightforwardly synthesized 18 different types of palladium nanoparticles by using a series of palladium metal precursors and ionic liquids. All the materials went for XRD, TEM, and ICP-OES analysis, before going to Heck cross-coupling reaction as a catalyst. We evaluated the catalytic performance of our developed IL#Pd MNP catalyst over Heck cross-coupling reaction between different terminal olefins with various 3-iodo-benzopyrones, including sterically hindered, electron-rich, electron neutral and electron-deficient systems. We obtained the Heck cross-coupling reaction product in good to average yield under phosphine free reaction condition with an added advantage of 6 times catalyst recycling.
Achilles tendon, which connects the calf muscles to heel, is the strongest tendon in the body. Despite its strength, it is more prone to injury due to its limited blood supply. Tendon-related injuries are more common in sportspersons, people with laborintensive work and the aged community. The currently available treatment mode is surgery which is expensive with chances of re-injury. Present study made an attempt to fabricate a tissue-engineered tendon product using decellularized tendon (DT) seeded with stem cells and bioactive components of Tinospora cordifolia extract (TCE). The bare DT tissue scaffold/substitute may also serve as a drug delivery platform for growth factors and cells with a new approach to promote tissue regeneration in clinical applications. DT construct showed good regenerative potential and easily promoted new tissue formation. Decellularization of the tendon was carried out by chemical method using tri (n-butyl) phosphate (TnBP). DT was physicochemically characterized by contact angle measurement, thermal gravimetric analysis (TGA), and mechanical testing. Rabbit adipose derived mesenchymal stem cells (RADMSCs) were isolated and phenotypically characterized by flow cytometry analysis, tri lineage differentiation, and so forth. Further, stem cell seeded DT scaffolds were prepared and found to be non-toxic by cytotoxicity, cell adhesion by scanning electron microscope (SEM) analysis, cell viability by live dead assays, and so forth.The findings of this study yield valid proof for the employability of cell-seeded DT construct as a natural scaffold in repairing injured tendons-the toughest chords of the skeleton. This is a cost effective method for the replacement of injured/damaged tendons for athletes, people in labor-intensive occupations, the elderly population, and so forth-a boon towards the repair of the tendon in damage/injury.
: Tendon is a collagenous tissue to connect bone and muscle. Healing of damaged/injured tendon is the primary clinical challenge in musculoskeletal regeneration because they often react poorly to treatment. Tissue engineering (a triad strategy of scaffolds, cells and growth factors) may have the potential to improve the quality of tendon tissue healing under such impaired situations. Tendon tissue engineering aims to synthesize graft alternatives to repair the injured tendon. Biological scaffolds derived from decellularized tissue may be a better option as their biomechanical properties are similar to the native tissue. This review is designed to provide background information on the current challenges in curing torn/worn out the tendon and the clinical relevance of decellularized scaffolds for such applications.
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