ABSTRACT
Objective To compare the two different decellularization methods for preparation of liver whole-organ decellularized matrix for providing an experimental basis for screening more effective method. Methods Liver whole-organ decellularized matrix was prepared by two different decellularization methods using sodium dodecylsulfate (SDS) and Triton X-100+SDS (Tx+SDS) as main detergent respectively. The three-dimensional shape, vascular structure, histological results and immunofluorescence images were observed, and the contents of residual DNA, collagen and growth factors (HGF, bFGF) were determined by ELISA. Results Liver whole-organ decellularized matrix was successfully prepared by both methods, as the cellular and nuclear components were removed successfully and the extracellular matrix (ECM) protein was preserved. The Tx+SDS method preserved the vascular structure of the liver, and the SDS method resulted in damage to the vascular structure. Compared with SDS method, the Tx+SDS method preserved more ECM protein, including almost 100% of collagen, and 58.5% of HGF and 42.5% of bFGF. Conclusion The liver whole-organ decellularized matrix could be well prepared by Tx+SDS method, and it may provide an effective scaffold for the study of tissue engineered liver and regenerative medicine.
ABSTRACT
<p><b>OBJECTIVE</b>Investigate the response of the patients with obstructive sleep apnea hypopnea syndrome (OSAHS) patients to combination of transpalatal advancement pharyngoplasty and uvulopalatopharyngoplasty.</p><p><b>METHODS</b>Thirty two patients with OSAHS, age ranged from 27 to 54, mean value (x +/- s) 39.1 +/- 7.8, male, body mass index (BMI) ranged from 22.9 to 36. 7 kg/m2, mean value (29.0 +/- 3.6) kg/m2, preoperative apnea and hypopnea index (AHI) was 11.7/h to 113.7/h, mean value (61.8 +/- 21.9)/h, the lowest blood oxygen saturation was 0.10 to 0.85, mean value 0.64 +/- 0. 13. With preoperative endoscopic technique, bony nasopharynx cavity narrowing were present, 14 patients had concomitant tonge-base obstruction. Cephalometric result, SNA ranged from 72.9 degrees to 87.0 degrees, mean value (80.7 +/- 4.1) degrees; SNB 69.50 to 85.0 degrees, mean value (76.8 +/- 4.5) degrees; PAS 0.5 cm to 2.1 cm, mean value (1.2 +/- 0.5) cm; MP-H: ranged from 1.2 cm to 3.5 cm, mean value (2.2 +/- 0.7) cm; PNS ranged from 2.4 cm to 3.5 cm, mean value (2.8 +/- 0.4) cm. All the patients had H-UPPP and concomitant transpalatal advancement pharyngoplasty. Fourteen patients with tonge-base obstruction had chin advancement. Results Six months after the operations, the patients were evaluated the response to the operations using Epworth sleep scale, OSAHS filtration questionnaire scale and polysomnography (PSG). There were 27 patients with the decrease percent of AHI reaching or more than 25% and 22 patients with the decrease percent of AHI reaching or more than 50% including 8 patients with AHI less than 5. The other 5 patients were ineffective. After operation, the Epworth sleep scale decreased from (9.2 +/- 4.5) to (4.7 +/- 2. 8) and OSAHS filtration questionnaire scale decreased form (56.0 +/- 15.3) to (17.5 +/- 11.5). Both of the differences were obvious (P < 0.01).</p><p><b>CONCLUSIONS</b>Combination of transpalatal advancement pharyngoplasty and H-UPPP can improve the efficacity and in some patients with pure retropalatal airway narrowing, the cure rate can be improved.</p>