Development of Gelatin-Silk Sericin Incorporated with Poly(vinyl alcohol) Hydrogel-Based Nanocomposite for Articular Cartilage Defects in Rat Knee Joint Repair

2021 ◽  
Vol 17 (2) ◽  
pp. 242-252
Author(s):  
Ji-Jun Zhao ◽  
Dong-Cheng Liu ◽  
Ying-Hao Yu ◽  
Hongtao Tang

Sericin, a silk protein, has a high potential for use as an extracellular matrix in tissue engineering applications. In this study, novel gelatin (GEL) and silk sericin (SS) were incorporated with a polyvinyl alcohol) PVA hydrogel nanocomposite (GEL-SS-PVA) scaffold that can be applied to repair cartilage. Glutaraldehyde was used as a cross-linking agent, with hydrochloric acid acting as an initiator. The microstructure characteristics of the obtained GEL-SS and GEL-SS-PVA scaffolds were also examined using FTIR and XRD spectra and their enhanced thermal stability was assessed by TGA. The blended GEL-SS and GEL-SS-PVA scaffolds were confirmed by SEM analysis to be highly porous with optimum pore sizes of 172 and 58 µm, respectively. Smaller pore sizes and improved uniformity were observed as the concentration of PVA in the GEL-SS-PVA scaffold increased. PVA decreased the tensile strength and elongation of the membranes but increased the modulus. Swelling studies showed high swellability and complete degradation in the presence of phosphate-buffered saline. Cytocompatibility of the GEL-SS-PVA scaffolds showed that these had the highest potential to promote cell proliferation as evaluated with standard microscopy using L929 fibroblasts. The prepared GEL-SS composite scaffold incorporated with the PVA hydrogel was implanted in full-thickness articular cartilage defects in rats. The repair effect of cartilage defects was observed and evaluated among the GEL-SS-PVA, GEL-SS, and control operation groups. The defects were almost completely repaired after 14 weeks in the GEL-SS-PVA group, thereby indicating that the GEL-SS-PVA composite had a favorable effect on articular cartilage defects in rat knee joint repair.

2006 ◽  
Vol 15 (1) ◽  
pp. 61-66 ◽  
Author(s):  
Masataka Deie ◽  
Yoshio Sumen ◽  
Nobuo Adachi ◽  
Atsuo Nakamae ◽  
Ayato Miyamoto ◽  
...  

2004 ◽  
Vol 2 (4) ◽  
pp. 0-0
Author(s):  
Rimtautas Gudas ◽  
Romas Jonas Kalesinskas ◽  
Giedrius Bernotavičius ◽  
Eglė Monastyreckienė ◽  
Angelija Valančiūtė ◽  
...  

Rimtautas Gudas1, Romas Jonas Kalesinskas1, Giedrius Bernotavičius1, Eglė Monastyreckienė2, Angelija Valančiūtė3, Darius Pranys41 Kauno medicinos universiteto klinikųOrtopedijos ir traumatologijos klinikaEivenių g. 2, LT-50009 Kaunasel paštas: [email protected] Kauno medicinos universiteto klinikųRadiologijos klinika3 Kauno medicinos universitetoEmbriologijos ir histologijos katedra4 Kauno medicinos universitetoPatologinės anatomijos klinika Tikslas Mūsų prospektyvaus klinikinio tyrimo tikslas – įvertinti mozaikinės autologinės transplantacijos rezultatus gydant kelio sąnario kremzlės pažeidimus. Ligoniai ir metodai 1998–2002 metais KMU Ortopedijos ir traumatologijos klinikoje atliktos 87 autologinės mozaikinės transplantacijos operacijos esant kelio sąnario kremzlės ir kaulo pažeidimams. Pacientų amžiaus vidurkis operacijų metu buvo 24,74 ± 7,20 metų (14–40 metų). Simptomai vidutiniškai truko 21,32 ± 5,57 mėnesio, o pacientai įvertinti praėjus vidutiniškai 24,4 mėnesio (nuo 12 iki 60 mėnesių) po operacijos. Rezultatai apibendrinti naudojant ICRS (International Cartilage Repair Society) anketą, 13 (15%) atvejų – remiantis kartotinių artroskopijų metu atliktu makroskopiniu įvertinimu, 9 (11%) atvejais – histologiniu tyrimu, 57 (67%) atvejais – BMR ir visais atvejais – rentgeno tyrimais. Visus anketinius įvertinimus atliko nepriklausomas gydytojas ortopedas prieš operacijas ir po operacijų praėjus dvylikai, dvidešimt keturiems, trisdešimt šešiems, keturiasdešimt aštuoniems ir šešiasdešimčiai mėnesių. Nepriklausomi nuo tyrimo gydytojai, radiologas ir patologas, atliko visus BMR ir histomorfologinius įvertinimus. Rezultatai Praėjus vidutiniškai 24,4 mėnesio po mozaikinės transplantacijos, ICRS anketos būdu nustatytas klinikinis rezultatų pagerėjimas (p < 0,05). Funkcinis ir objektyvus įvertinimas pagal ICRS anketą buvo toks: 93% atvejų gauti geri ir labai geri operacinio gydymo rezultatai, kitais atvejais (7%) gydymo rezultatai buvo patenkinami. Kartotinių artroskopijų metu (remiantis ICRS protokolu), po operacijų praėjus vidutiniškai 12,4 mėnesio, 11 (84%) iš 13 atvejų buvo nustatytas geras ir labai geras sąnario kremzlės makroskopinis atsitaisymas. Sąnario kremzlės biopsijos ir histologinis tyrimas buvo atliktas 11% pacientų, ir daugumos jų (remiantis ICRS protokolu) sąnario kremzlės ir pokremzlinio kaulo atitaisymo koeficientas buvo geras. BMR tyrimas parodė, kad 94% pacientų sąnario paviršius atkurtas gerai arba labai gerai. Išvados Mūsų tyrimas parodė, kad po mozaikinės autologinės transplantacijos praėjus vidutiniškai 24,4 mėnesio (nuo 12 iki 60 mėn.) fiziškai aktyvių pacientų, kuriems buvo pažeista kelio sąnario kremzlė, klinikinė ir funkcinė būklė labai pagerėjo. Dauguma pacientų po kremzlės mozaikinės autologinės transplantacijos atgauna prieš pažeidimą buvusį fizinio aktyvumo lygį. Histomorfologinis persodintų transplantatų tyrimas parodė, kad visais tirtais atvejais išsilaikė hialininės kremzlės struktūra ir fibroelastinio audinio intarpai tarp transplantatų. Reikšminiai žodžiai: sąnario kremzlės pažeidimai, mozaikinė transplantacija Mosaic-like autologous osteochondral transplantation for the treatment of knee joint articular cartilage injuries Rimtautas Gudas1, Romas Jonas Kalesinskas1, Giedrius Bernotavičius1, Eglė Monastyreckienė2, Angelija Valančiūtė3, Darius Pranys4 Objective The purpose of this prospective clinical study was to evaluate the outcomes of mosaic type autologous osteochondral transplantation procedure for the treatment of the articular cartilage defects of the knee joint. Patients and methods Between 1998 and 2002, a total of 85 patients underwent an osteochondral autologous transplantation (mosaicplasty) procedure for osteochondral or chondral knee joint injury. The patients were evaluated using the ICRS score, arthroscopically, histologically, with MRI and X-ray examinations. The mean duration of symptoms was 21.32 ± 5.57 months and the mean follow-up was 24.4 months (range, 12 to 60 months). The mean age of the patients during the surgery was 24.74 ± 7.20 years (range, 14 to 40 years). An independent observer performed a follow-up examination after six, twelve, twenty-four, thirty-six and forty-eight months. In 13 (15%) of 85 cases 12.4 months postoperatively, arthroscopy with biopsy for histological evaluation was carried out. A radiologist and a pathologist, both blinded to each patient’s treatment, did the radiological and histological evaluations. Results After 24.4 months all the patients showed a significant clinical improvement (p < 0.05). The cartilage Repair Society (ICRS) score, functional and objective assessment revealed 93% to have excellent or good results after mosaicplasty; 7% were fair 24.4 months (range, 12–60 months) after the operations. The ICRS evaluation showed a significant improvement after the mosaicplasty procedure 24.4 months following operations (p = 0.005). No serious complications were reported. The ICRS for macroscopic evaluation during arthroscopy 12.4 months after mosaicplasty demonstrated excellent or good repair in 11 (84%) of 13 cases. Biopsy specimens were obtained from 9 (69%) of 13 patients, and histological evaluation of repair showed good scores (according to ICRS) for most samples after mosaicplasty. A MRI evaluation demonstrated excellent or good repairs in 94% after mosaicplasty. Conclusions On an average after 24.4 months (range, 12 to 60 months) of follow-up, our clinical study has shown a significant improvement of the clinical status of the physically active patients after the mosaic type autologous osteochondral transplantation for the repair of articular cartilage defects in the knee. Histologically, the osteochondral cylinder transplants retained hyaline cartilage. Keywords: articular cartilage injury, osteochondral mosaic-like transplantation


2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Yuan Li ◽  
Yanping Liu ◽  
Qiang Guo

AbstractCartilage defects frequently occur around the knee joint yet cartilage has limited self-repair abilities. Hydrogel scaffolds have excellent potential for use in tissue engineering. Therefore, the aim of the present study was to assess the ability of silk fibroin (SF) hydrogel scaffolds incorporated with chitosan (CS) nanoparticles (NPs) to repair knee joint cartilage defects. In the present study, composite systems of CS NPs incorporated with transforming growth factor-β1 (TGF-β1; TGF-β1@CS) and SF incorporated with bone morphogenetic protein-2 (BMP-2; TGF-β1@CS/BMP-2@SF) were developed and characterized with respect to their size distribution, zeta potential, morphology, and release of TGF-β1 and BMP-2. Bone marrow stromal cells (BMSCs) were co-cultured with TGF-β1@CS/BMP-2@SF extracts to assess chondrogenesis in vitro using a cell counting kit-8 assay, which was followed by in vivo evaluations in a rabbit model of knee joint cartilage defects. The constructed TGF-β1@CS/BMP-2@SF composite system was successfully characterized and showed favorable biocompatibility. In the presence of TGF-β1@CS/BMP-2@SF extracts, BMSCs exhibited normal cell morphology and enhanced chondrogenic ability both in vitro and in vivo, as evidenced by the promotion of cell viability and the alleviation of cartilage defects. Thus, the TGF-β1@CS/BMP-2@SF hydrogel developed in the present study promoted chondrogenic ability of BMSCs both in vivo and in vitro by releasing TGF-β1 and BMP-2, thereby offering a novel therapeutic strategy for repairing articular cartilage defects in knee joints.


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