scholarly journals Long-Term Outcome of Sciatic Nerve Regeneration Using Bio3D Conduit Fabricated from Human Fibroblasts in a Rat Sciatic Nerve Model

2021 ◽  
Vol 30 ◽  
pp. 096368972110213
Author(s):  
Maki Ando ◽  
Ryosuke Ikeguchi ◽  
Tomoki Aoyama ◽  
Mai Tanaka ◽  
Takashi Noguchi ◽  
...  
Keyword(s):  
Sciatic Nerve ◽  
Nerve Regeneration ◽  
Human Fibroblasts ◽  
Nerve Conduit ◽  
Long Term Outcome ◽  
Rat Sciatic Nerve ◽  
Nerve Transplantation ◽  
Significant Difference ◽  
Silicon Tube

Previously, we developed a Bio3D conduit fabricated from human fibroblasts and reported a significantly better outcome compared with artificial nerve conduit in the treatment of rat sciatic nerve defect. The purpose of this study is to investigate the long-term safety and nerve regeneration of Bio3D conduit compared with treatments using artificial nerve conduit and autologous nerve transplantation. We used 15 immunodeficient rats and randomly divided them into three groups treated with Bio3D ( n = 5) conduit, silicon tube ( n = 5), and autologous nerve transplantation ( n = 5). We developed Bio3D conduits composed of human fibroblasts and bridged the 5 mm nerve gap created in the rat sciatic nerve. The same procedures were performed to bridge the 5 mm gap with a silicon tube. In the autologous nerve group, we removed the 5 mm sciatic nerve segment and transplanted it. We evaluated the nerve regeneration 24 weeks after surgery. Toe dragging was significantly better in the Bio3D group (0.20 ± 0.28) than in the silicon group (0.6 ± 0.24). The wet muscle weight ratios of the tibial anterior muscle of the Bio3D group (79.85% ± 5.47%) and the autologous nerve group (81.74% ± 2.83%) were significantly higher than that of the silicon group (66.99% ± 3.51%). The number of myelinated axons and mean myelinated axon diameter was significantly higher in the Bio3D group (14708 ± 302 and 5.52 ± 0.44 μm) and the autologous nerve group (14927 ± 5089 and 6.04 ± 0.85 μm) than the silicon group (7429 ± 1465 and 4.36 ± 0.21 μm). No tumors were observed in any of the rats in the Bio3D group at 24 weeks after surgery. The Bio3D group showed significantly better nerve regeneration and there was no significant difference between the Bio3D group and the nerve autograft group in all endpoints.

scholarly journals The efficacy of a scaffold-free Bio 3D conduit developed from human fibroblasts on peripheral nerve regeneration in a rat sciatic nerve model

PLoS ONE ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. e0171448 ◽  
Author(s):  
Hirofumi Yurie ◽  
Ryosuke Ikeguchi ◽  
Tomoki Aoyama ◽  
Yukitoshi Kaizawa ◽  
Junichi Tajino ◽  
...  
Keyword(s):  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Nerve Regeneration ◽  
Peripheral Nerve Regeneration ◽  
Human Fibroblasts ◽  
Rat Sciatic Nerve ◽  
Nerve Model

The role of evaluation methods in the assessment of peripheral nerve regeneration through synthetic conduits: a systematic review

2007 ◽  
Vol 107 (6) ◽  
pp. 1168-1189 ◽  
Author(s):  
Carmen L. A. M. Vleggeert-Lankamp
Keyword(s):  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Nerve Regeneration ◽  
Nerve Fiber ◽  
Peripheral Nerve Regeneration ◽  
Evaluation Methods ◽  
Resolving Power ◽  
New Paradigm ◽  
Rat Sciatic Nerve ◽  
Significant Difference

Object A number of evaluation methods that are currently used to compare peripheral nerve regeneration with alternative repair methods and to judge the outcome of a new paradigm were hypothesized to lack resolving power. This would too often lead to the conclusion that the outcome of a new paradigm could not be discerned from the outcome of the current gold standard, the autograft. As a consequence, the new paradigm would incorrectly be judged as successful. Methods An overview of the methods that were used to evaluate peripheral nerve regeneration after grafting of the rat sciatic nerve was prepared. All articles that were published between January 1975 and December 2004 and concerned grafting of the rat sciatic nerve (minimum graft length 5 mm) and in which the experimental method was compared with an untreated or another grafted nerve were included. The author scored the presence of statistically significant differences between paradigms. Results Evaluation of nerve fiber count, nerve fiber density, N-ratio, nerve histological success ratio, compound muscle action potential, muscle weight, and muscle tetanic force are methods that were demonstrated to have resolving power. Conclusions A number of evaluation methods are not suitable to demonstrate a significant difference between experimental paradigms in peripheral nerve regeneration. It is preferable to apply a combination of evaluation methods with resolving power to evaluate nerve regeneration properly.

scholarly journals Long-term outcome after allogeneic stem cell transplantation in multiple myeloma

2021 ◽  
Author(s):  
Sini Luoma ◽  
Raija Silvennoinen ◽  
Auvo Rauhala ◽  
Riitta Niittyvuopio ◽  
Eeva Martelin ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Stem Cell ◽  
Stem Cell Transplantation ◽  
Cell Transplantation ◽  
Term Survival ◽  
Hematopoietic Stem ◽  
Long Term Outcome ◽  
Significant Difference ◽  
Relapse Group

AbstractThe role of allogeneic hematopoietic stem cell transplantation (allo-SCT) in multiple myeloma is controversial. We analyzed the results of 205 patients transplanted in one center during 2000–2017. Transplantation was performed on 75 patients without a previous autologous SCT (upfront-allo), on 74 as tandem transplant (auto-allo), and on 56 patients after relapse. Median overall survival (OS) was 9.9 years for upfront-allo, 11.2 years for auto-allo, and 3.9 years for the relapse group (p = 0.015). Progression-free survival (PFS) was 2.4, 2.4, and 0.9 years, respectively (p < 0.001). Non-relapse mortality at 5 years was 8% overall, with no significant difference between the groups. Post-relapse survival was 4.1 years for upfront-allo and auto-allo, and 2.6 years for the relapse group (p = 0.066). Survival of high-risk patients was reduced. In multivariate analysis, the auto-allo group had improved OS and chronic graft-versus-host disease was advantageous in terms of PFS, OS, and relapse incidence. Late relapses occurred in all groups. Allo-SCT resulted in long-term survival in a small subgroup of patients. Our results indicate that auto-allo-SCT is feasible and could be considered for younger patients in the upfront setting.

Triptolide improves nerve regeneration and functional recovery following crush injury to rat sciatic nerve

2014 ◽  
Vol 561 ◽  
pp. 198-202 ◽  
Author(s):  
Yong-Guang Zhang ◽  
Qing-Song Sheng ◽  
Hong-Kun Wang ◽  
Li Lv ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Sciatic Nerve ◽  
Nerve Regeneration ◽  
Functional Recovery ◽  
Crush Injury ◽  
Rat Sciatic Nerve

Early Aneurysm Surgery and Preventive Therapy with Intravenously Administered Nimodipine: A Multicenter, Double-Blind, Dose-Comparison Study

Neurosurgery ◽  
1990 ◽  
Vol 26 (3) ◽  
pp. 458-464 ◽  
Author(s):  
Joachim M. Gilsbach ◽  
Hans J. Reulen ◽  
Bengt Ljunggren ◽  
Lennart Brandt ◽  
Hans v. Holst ◽  
...  
Keyword(s):  
Preventive Therapy ◽  
Neurological Dysfunction ◽  
Comparison Study ◽  
Double Blind ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Dose Comparison ◽  
Significant Difference ◽  
Low Incidence

Abstract A European, multicenter. prospective, randomized. double-blind, dose-comparison study on preventive therapy with intravenously administered nimodipine was performed to evaluate the efficacy and tolerability of two different doses: 2 and 3 mg/h. Two hundred four patients fulfilled the criteria for enrollment in the study; surgery within 72 hours after the last subarachnoid hemorrhage, and age between 16 and 72 years. All patients who had Hunt and Hess grades of I to III were operated upon: patients who had poor Hunt and Hess grades (IV-V) were operated on according to the surgeon's choice. This treatment regimen was associated with a low incidence of delayed neurological dysfunction with no significant difference between the two dosage groups: three patients (1.5%) remained severely disabled and two (1%) moderately disabled due to vasospasm with or without additional complications. Among the patients with Hunt and Hess grades of IV or V. the long-term outcome was favorable (good-fair) for 40% and unfavorable for 60%. Among the patients with grades of I to III, the long-term outcome was favorable for 89% and unfavorable for 11%.

scholarly journals Learning curve in rat dissection for experimental sciatic nerve repair

2019 ◽  
pp. 243-248
Author(s):  
Marin Andrei ◽  
Marin Georgiana Gabriela ◽  
Dobrete Nicoleta Amalia ◽  
Enescu Dan Mircea
Keyword(s):  
Sciatic Nerve ◽  
Learning Curve ◽  
Nerve Regeneration ◽  
Experimental Model ◽  
Rat Model ◽  
Surgical Intervention ◽  
Nerve Repair ◽  
Learning Curves ◽  
Rat Sciatic Nerve ◽  
Nerve Surgery

The baseline for any key research in nerve regeneration is an experimental model and the sciatic nerve in the rat model is the workhorse in this field. Although physically resistant to external traumas, a surgical intervention constitutes a major distress even for a rat. In the following presentation, we will analyse the learning curves for different stages in the rat sciatic nerve surgery as well as possible factors which influence these times.

scholarly journals Hypospadias: clinical approach, surgical technique and long-term outcome

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Pier Luca Ceccarelli ◽  
Laura Lucaccioni ◽  
Francesca Poluzzi ◽  
Anastasia Bianchini ◽  
Diego Biondini ◽  
...  
Keyword(s):  
Functional Outcome ◽  
Surgical Repair ◽  
Adult Life ◽  
Clinical Approach ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Initial Surgery ◽  
Significant Difference ◽  
Corrective Procedures

Abstract Background Hypospadias is one of the most common congenital abnormalities in male newborn. There is no universal approach to hypospadias surgical repair, with more than 300 corrective procedures described in current literature. The reoperation rate within 6–12 months of the initial surgery is most frequently used as an outcome measure. These short-term outcomes may not reflect those encountered in adolescence and adult life. This study aims to identify the long-term cosmetic, functional and psychosexual outcomes. Methods Medical records of boys who had undergone surgical repair of hypospadias by a single surgical team led by the same surgeon at a single centre between August 2001 and December 2017 were reviewed. Families were contacted by telephone and invited to participate. Surgical outcome was assessed by combination of clinical examination, a life-related interview and 3 validated questionnaires (the Penile Perception Score-PPS, the Hypospadias Objective Score Evaluation-HOSE, the International Index of Erectile Function-5-IIEF5). Outcomes were compared according to age, severity of hypospadias, and respondent (child, parent and surgeon). Results 187 children and their families agreed to participate in the study. 46 patients (24.6%) presented at least one complication after the repair, with a median elapsed time of 11.5 months (6.5–22.5). Longitudinal differences in surgical corrective procedures (p < 0.01), clinical approach (p < 0.01), hospitalisation after surgery (p < 0.01) were found. Cosmetic data from the PPS were similar among children and parents, with no significant differences in child’s age or the type of hypospadias: 83% of children and 87% of parents were satisfied with the cosmetic result. A significant difference in functional outcome related to the type of hypospadias was reflected responses to HOSE amongst all groups of respondents: children (p < 0.001), parents (p=0.02) and surgeon (p < 0.01). The child’s HOSE total score was consistently lower than the surgeon (p < 0.01). The HOSE satisfaction rate on functional outcome was 89% for child and 92% for parent respondents. Conclusion Surgeons and clinicians should be cognizant of the long-term outcomes following hypospadias surgical repair and this should be reflected in a demand for a standardised approach to repair and follow-up.

Short and Long Term Outcome In Patients with Calcified Lesions Requiring Rotational Artherectomy

2021 ◽  
Vol 35 (2) ◽  
pp. 140-146
Author(s):  
Lima Asrin Sayami ◽  
Al Fazir Omar ◽  
Sheikh Ziarat Islam ◽  
Subasni Govindan ◽  
Zulaikha Zainal ◽  
...  
Keyword(s):  
P Value ◽  
Success Rates ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Operator Experience ◽  
Kaplan Meier ◽  
Significant Difference ◽  
Short And Long Term ◽  
Procedural Success

Objective: Despite the evolution of interventional techniques and operator experience, percutaneous revascularization of complex coronary lesions especially calcified lesions remains challenging because of lower procedural success and higher restenosis rates. Limited data are available on the effect of rotational atherectomy (RA) plus stenting in the treatment of complex calcified lesions of coronary artery disease. This study was aimed to investigate the characteristics, short and long term outcomes in patients undergoing RA. Material and Methods: A database search was performed from the year 2008 to 2013 in National Heart institute, Malaysia. A total of 16009 patients who underwent PCIs were enrolled in 2 groups, RA group (258 patients) and non RA group (15751 patients). The Chi square test and Kaplan - Meier analysis were used. Results: Male patients (73.6%) and elderly population (63.2%) were predominant in this study.The RA group had more co-morbidities such as diabetic on insulin (34%) and chronic kidney disease (57%). The lesions in RA group were more complex with higher Type C lesion (68.8%) and longer lesion (20.6%) compared to non RA group. Despite higher patient risk profile, the success rate of revascularization remains high in RA group (99.3%) as in non RA group (97%) (p value 0.89%). More importantly there were no significant difference in in-hospital mortality, myocardial infarction and stent thrombosis in both group (p value 0.1). In 1 year Kaplan - Meier survival graph, there were better survival noted in non RA group (97.7%) compare to RA (89.6%) (p value <0.005), Conclusion: The use of RA allows debulking of a calcified lesion and possibly explains the higher acute procedural success rates. However, the lower 1-yearsurvival in the RA group highlights the higher associated baseline comorbitidity in this group. Therefore, besides coronary intervention, this RA group requires aggressive medical therapy through a multi-disciplinary approach. Bangladesh Heart Journal 2020; 35(2) : 140-146

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