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Despang H, Weder A, Pietzsch M, Lindner O, Heinig A, Rentsch W, Paul A, Fischer WJ. A Modular System for Capacitive Ecg-Acquisition. BIOMED ENG-BIOMED TE 2013; 58 Suppl 1:/j/bmte.2013.58.issue-s1-I/bmt-2013-4218/bmt-2013-4218.xml. [DOI: 10.1515/bmt-2013-4218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Cramer H, Lauche R, Paul A, Dobos G. Mindfulness-based stress reduction for breast cancer-a systematic review and meta-analysis. ACTA ACUST UNITED AC 2013; 19:e343-52. [PMID: 23144582 DOI: 10.3747/co.19.1016] [Citation(s) in RCA: 174] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The aim of this systematic review and meta-analysis was to assess the effectiveness of mindfulness-based stress reduction (mbsr) and mindfulness-based cognitive therapy (mbct) in patients with breast cancer. METHODS The medline, Cochrane Library, embase, cambase, and PsycInfo databases were screened through November 2011. The search strategy combined keywords for mbsr and mbct with keywords for breast cancer. Randomized controlled trials (rcts) comparing mbsr or mbct with control conditions in patients with breast cancer were included. Two authors independently used the Cochrane risk of bias tool to assess risk of bias in the selected studies. Study characteristics and outcomes were extracted by two authors independently. Primary outcome measures were health-related quality of life and psychological health. If at least two studies assessing an outcome were available, standardized mean differences (smds) and 95% confidence intervals (cis) were calculated for that outcome. As a measure of heterogeneity, I(2) was calculated. RESULTS Three rcts with a total of 327 subjects were included. One rct compared mbsr with usual care, one rct compared mbsr with free-choice stress management, and a three-arm rct compared mbsr with usual care and with nutrition education. Compared with usual care, mbsr was superior in decreasing depression (smd: -0.37; 95% ci: -0.65 to -0.08; p = 0.01; I(2) = 0%) and anxiety (smd: -0.51; 95% ci: -0.80 to -0.21; p = 0.0009; I(2) = 0%), but not in increasing spirituality (smd: 0.27; 95% ci: -0.37 to 0.91; p = 0.41; I(2) = 79%). CONCLUSIONS There is some evidence for the effectiveness of mbsr in improving psychological health in breast cancer patients, but more rcts are needed to underpin those results.
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Huu AL, Paul A, Prakash S, Shum-Tim D. Route of delivery, cell retention, and efficiency of polymeric microcapsules in cellular cardiomyoplasty. Methods Mol Biol 2013; 1036:121-35. [PMID: 23807792 DOI: 10.1007/978-1-62703-511-8_11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Stem cell transplantation has been considered as a major breakthrough for treating ischemic heart disease. However, survival and retention of transplanted cells at the site of infarction remains tenuous. This chapter details a method of creating polymeric microcapsules for cell delivery, resulting in increased retention of transplanted cells at the target site, while achieving minimal mechanical trauma and cell loss. Simultaneously biocompatible and biodegradable, polymeric microcapsules have important implications in regenerative cell therapy.
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Zach H, Cetin H, Hilger E, Paul A, Wuschitz B, Jung R, Auff E, Zimprich F. The effect of early prednisolone treatment on the generalization rate in ocular myasthenia gravis. Eur J Neurol 2012; 20:708-13. [PMID: 23279780 DOI: 10.1111/ene.12057] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 11/01/2012] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND PURPOSE Several small retrospective studies have observed that patients with a purely ocular manifestation of myasthenia gravis (MG) are significantly less likely to convert to a generalized disease when treated early on with corticosteroids. However, given the limited number of reported patients in the literature these findings still remain controversial. METHODS In order to increase the number of published cases, we performed a retrospective analysis on 44 patients with newly diagnosed ocular MG who were subsequently either treated with corticosteroids or received no immunosuppressive therapy at all. The generalization rate was assessed at the end of a 2-year follow-up period. RESULTS Whereas none of 17 treated patients generalized, 11 of 27 (41%) untreated patients developed generalized symptoms. The difference between the groups was significant (P=0.003). CONCLUSIONS Our results agree well with previous studies on this issue. Taken together, published data indicate risk ratios for generalization of below 0.32 under corticosteroid treatment in comparison to untreated patients.
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Mathe Z, Treckmann JW, Heuer M, Zeiger A, Sauerland S, Witzke O, Paul A. Stented ureterovesical anastomosis in renal transplantation: does it influence the rate of urinary tract infections? Eur J Med Res 2012; 15:297-302. [PMID: 20696641 PMCID: PMC3351954 DOI: 10.1186/2047-783x-15-7-297] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Objective Our objective was to evaluate the impact of routine use of double-J stents on the incidence of urinary tract infection after renal transplantation. Methods We conducted a retrospective-comparative single-centre study in 310 consecutive adult deceased donor kidney recipients transplanted from 2002 to 2006. Patients were divided in two groups, with or without urinary stent implantation. To evaluate the predictive factors for UTI, donor and recipients pre- and post-transplantation data were analysed. Early urological complications and renal function within 12 months of transplantation were included as well. Results A total of 157 patients were enrolled to a stent (ST) and 153 patients to a no-stent (NST) group. The rate of urinary tract infection at three months was similar between the two groups (43.3% ST vs. 40.1% NST, p = 0.65). Of the identified pathogens Enterococcus and Escherichia coli were the most common species. In multivariate analysis neither age nor immunosuppressive agents, BMI or diabetes seemed to have influence on the rate of UTI. When compared to males, females had a significantly higher risk for UTI (54.0% vs. 33.5%). Conclusion Prophylactic stenting of the ureterovesical anastomosis does not increase the risk of urinary tract infection in the early postoperative period.
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Paul A, Chen G, Khan A, Rao VTS, Shum-Tim D, Prakash S. Genipin-Cross-Linked Microencapsulated Human Adipose Stem Cells Augment Transplant Retention Resulting in Attenuation of Chronically Infarcted Rat Heart Fibrosis and Cardiac Dysfunction. Cell Transplant 2012; 21:2735-51. [DOI: 10.3727/096368912x637497] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Stem cell transplantation has been widely acknowledged for their immense potential in regenerative medicine. In these procedures, the implanted cells need to maintain both their viability and functional properties for effective therapeutic outcomes. This has long been a subject of major concern and intensive studies. Microencapsulation of stem cells within polymeric microcapsules can be an efficient approach to achieve this goal, particularly for heart diseases. This study reports the use of biocompatible, fluorogenic genipin-cross-linked alginate chitosan (GCAC) microcapsules in delivery of human adipose stem cells (hASCs) with an aim to increase the implant retention in the infarcted myocardium for maximum clinical benefits. In vitro results show, under hypoxic conditions, the microencapsulated cells overexpressed significantly higher amount of biologically active vascular endothelial growth factor (VEGF). We investigated on the in vivo potential using immunocompetent female rats after induction of myocardial infarction. For this, animal groups ( n = 8) received empty control microcapsules, 1.5 × 106 free male hASCs, or 1.5 × 106 microencapsulated male hASCs. Results show significant retention (3.5 times higher) of microencapsulated hASCs compared to free hASCs after 10 weeks of transplantation. Microencapsulated hASCs showed significantly attenuated infarct size compared to free hASCs and empty microcapsule group (21.6% ± 1.1% vs. 27.2% ± 3.1% vs. 33.3% ± 3.2%; p < 0.05), enhanced vasculogenesis, and improved cardiac function (fractional shortening: 24.2% ± 2.1% vs. 19.1% ± 0.5% vs. 12.0% ± 4.0%; p < 0.05). These data suggest that microencapsulated hASCs can contribute significantly to the improvement in cardiac functions. Their greater retentions exhibit reduced fibrosis and cardiac dysfunction in experimental animals. However, further research is needed to fully comprehend the underlying biological and immunological effects of microencapsulated hASCs, which jointly play important roles in cardiac repair.
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Paul A, Lauche R, Cramer H, Altner N, Langhorst J, Dobos G. An Integrative Day Care Clinic for chronically ill patients: Concept and case presentation. Eur J Integr Med 2012. [DOI: 10.1016/j.eujim.2012.07.980] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Kaiser GM, Heuer M, Radünz S, Kirchner C, Juntermanns B, Paul A. Attitude Towards Organ Donation and Influence of Information: Analysis of An Online Survey. Transplantation 2012. [DOI: 10.1097/00007890-201211271-00970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vernadakis S, Fouzas I, Kykalos S, Kaiser G, Metzelder M, Paul A, Sotiropoulos G. Successful Salvage Delivery and Liver Transplantation for Fulminant Hepatic Failure in a 34-Week Pregnant Woman: A Case Report. Transplant Proc 2012; 44:2768-9. [DOI: 10.1016/j.transproceed.2012.09.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Paul A, Gratier JP, Boudon J. A numerical model for simulating deformation of Mount St. Helens Volcano. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jb092ib10p10299] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Paul A. Chelidonine isolated from ethanolic extract of Chelidonium majus promotes apoptosis in HeLa cells through p38-p53 and PI3K/AKT signalling pathways. ACTA ACUST UNITED AC 2012; 10:1025-38. [DOI: 10.3736/jcim20120912] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rodes L, Coussa-Charley M, Marinescu D, Paul A, Fakhoury M, Abbasi S, Khan A, Tomaro-Duchesneau C, Prakash S. Design of a novel gut bacterial adhesion model for probiotic applications. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2012; 41:116-24. [PMID: 22889228 DOI: 10.3109/10731199.2012.712047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A new gut bacterial adhesion model has been developed. For this, a continuous-flow bioreactor packed with bacteria-coated beads was designed to simulate the gut lining and other features. In vitro model efficacy shows successful bacterial cell gut adhesions: bacterial adhesion was higher with mucin-alginate compared to controls. In feasibility study, adhesion of Lactobacillus fermentum NCIMB 5221 and Lactobacillus reuteri NCIMB 701359 was investigated for their metabolic activities for bile salt. Bile salt hydrolase (BSH)-active Lactobacillus reuteri exerted higher activity than non-BSH-active L. fermentum. This model has potential use in gut health, probiotic, bacterial cell gut adhesion and other delivery applications.
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Paul A, Shao W, Abbasi S, Shum-Tim D, Prakash S. PAMAM Dendrimer-Baculovirus Nanocomplex for Microencapsulated Adipose Stem Cell-Gene Therapy: In Vitro and in Vivo Functional Assessment. Mol Pharm 2012; 9:2479-88. [DOI: 10.1021/mp3000502] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Gallinat A, Moers C, Treckmann J, Smits JM, Leuvenink HGD, Lefering R, van Heurn E, Kirste GR, Squifflet JP, Rahmel A, Pirenne J, Ploeg RJ, Paul A. Machine perfusion versus cold storage for the preservation of kidneys from donors >=65 years allocated in the Eurotransplant Senior Programme. Nephrol Dial Transplant 2012; 27:4458-63. [DOI: 10.1093/ndt/gfs321] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Heuer M, Hussmann B, Kaiser G, Nast-Kolb D, Ruchholtz S, Lefering R, Paul A, Taeger G, Lendemans S. Inzidenz von Hohlorganverletzungen nach Trauma: Behandlung, Verlauf und Outcome – eine organspezifische Auswertung von 1127 Patienten des Traumaregisters der DGU. Zentralbl Chir 2012; 139:445-51. [DOI: 10.1055/s-0031-1283829] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Colby G, Lin L, Gomez J, Paul A, Huang J, Tamargo R, Coon A. E-042 Immediate procedural outcomes in 35 consecutive pipeline embolization cases: a single-center, single-user experience. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455c.42] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Colby G, Lin L, Paul A, Huang J, Tamargo R, Coon A. O-024 Cost comparison of endovascular treatment of anterior circulation aneurysms with the pipeline embolization device vs stent-assisted coiling. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455a.24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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218
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Groen H, Moers C, Smits JM, Treckmann J, Monbaliu D, Rahmel A, Paul A, Pirenne J, Ploeg RJ, Buskens E. Cost-effectiveness of hypothermic machine preservation versus static cold storage in renal transplantation. Am J Transplant 2012; 12:1824-30. [PMID: 22578189 DOI: 10.1111/j.1600-6143.2012.04030.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Static cold storage (CS) is the most widely used organ preservation method for deceased donor kidney grafts but there is increasing evidence that hypothermic machine perfusion (MP) may result in better outcome after transplantation. We performed an economic evaluation of MP versus CS alongside a multicenter RCT investigating short- and long-term cost-effectiveness. Three hundred thirty-six consecutive kidney pairs were included, one of which was assigned to MP and one to CS. The economic evaluation combined the short-term results based on the empirical data from the study with a Markov model with a 10-year time horizon. Direct medical costs of hospital stay, dialysis treatment, and complications were included. Data regarding long-term survival, quality of life, and long-term costs were derived from literature. The short-term evaluation showed that MP reduced the risk of delayed graft function and graft failure at lower costs than CS. The Markov model revealed cost savings of $86,750 per life-year gained in favor of MP. The corresponding incremental cost-utility ratio was minus $496,223 per quality-adjusted life-year (QALY) gained. We conclude that life-years and QALYs can be gained while reducing costs at the same time, when kidneys are preserved by MP instead of CS.
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Heuer M, Remmer N, Radünz S, Frühauf NR, Canbay A, Paul A, Kaiser GM. [Disposition for organ donation: analysis of a survey and trial of 974 respondents]. Zentralbl Chir 2012; 138:598-603. [PMID: 22700246 DOI: 10.1055/s-0031-1283920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
BACKGROUND Due to the lack of donor organs many patients cannot be helped in time with the necessary transplantation in Germany. At the same time, there is an organ donor potential that is not being exploited. A high refusal rate with a low rate of organ donor card holders remains problematic. The objective of this study was to collect the rate of holders of organ donor cards in a collective and to evaluate the collective according to other attributes in the context of a targeted trial. METHODS In 2009, a three-part questionnaire including an educational text regarding the topic of "organ donation" was sent out to the employees of the Sparkasse Essen (a savings bank). RESULTS Altogether, 974 out of 1480 (65.8 %) completely answered questionnaires were evaluated. 21.3 % of the respondents had an organ donor card at the time the survey was carried out. A statistically significant association between gender (p value, 0.0438), age (p value, 0.0267) and the possession of a donor card could be determined. 22.1 % of the respondents who participated in sports regularly or donated blood (p value, < 0.0049), were holding an organ donor card. 60 % of the respondents found the brief information to be sufficient, 22.6 % could imagine acquiring an organ donor card for them based on the presented information alone. CONCLUSION The spread of information and transparency in transplant medicine are essential for the facilitation of "willingness to donate organs". In the framework of this trial, besides data analysis, also fundamental information on "organ donation" could be conveyed. After all, 95.3 % of the respondents have read the information material and hence document the success of the study.
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Cramer H, Lauche R, Paul A, Dobos G. P02.170. Mindfulness-based stress reduction (MBSR) for breast cancer: a systematic review of randomized-controlled trials. Altern Ther Health Med 2012. [PMCID: PMC3373576 DOI: 10.1186/1472-6882-12-s1-p226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lauche R, Cramer H, Vasmer J, Paul A, Dobos G, Rampp T. P02.149. Integrative integrated migraine care: preliminary evaluation. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012. [PMCID: PMC3373687 DOI: 10.1186/1472-6882-12-s1-p205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Cramer H, Lange S, Klose P, Paul A, Dobos G. P04.82. Yoga for breast cancer: a systematic review of randomized controlled trials. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012. [PMCID: PMC3373797 DOI: 10.1186/1472-6882-12-s1-p352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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223
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Paul A, Higgins J, Baguley D, Axon P. Pulsatile Tinnitus: A Diagnostic Algorithm. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1314321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Paul A, Stone M, Deeks J, Carlyon R, Axon P. Is the Sound of Pulsatile Tinnitus Recordable? Skull Base Surg 2012. [DOI: 10.1055/s-0032-1314339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Rodes L, Paul A, Coussa-Charley M, Al-Salami H, Tomaro-Duchesneau C, Fakhoury M, Prakash S. Transit time affects the community stability of Lactobacillus and Bifidobacterium species in an in vitro model of human colonic microbiotia. ACTA ACUST UNITED AC 2012; 39:351-6. [PMID: 22066794 DOI: 10.3109/10731199.2011.622280] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Retention time, which is analogous to transit time, is an index for bacterial stability in the intestine. Its consideration is of particular importance to optimize the delivery of probiotic bacteria in order to improve treatment efficacy. This study aims to investigate the effect of retention time on Lactobacilli and Bifidobacteria stability using an established in vitro human colon model. Three retention times were used: 72, 96, and 144 h. The effect of retention time on cell viability of different bacterial populations was analyzed with bacterial plate counts and PCR. The proportions of intestinal Bifidobacteria, Lactobacilli, Enterococci, Staphylococci and Clostridia populations, analyzed by plate counts, were found to be the same as that in human colonic microbiota. Retention time in the human colon affected the stability of Lactobacilli and Bifidobacteria communities, with maximum stability observed at 144 h. Therefore, retention time is an important parameter that influences bacterial stability in the colonic microbiota. Future clinical studies on probiotic bacteria formulations should take into consideration gastrointestinal transit parameters to improve treatment efficacy.
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Paul A, Melian E, Surucu M, Kwasny M, Shoup M, Godellas C, Vandevender D, Sethi A, Aranha G. PO-415 LOCAL CONTROL, SURVIVAL AND COMPLICATIONS OF SOFT TISSUE SARCOMAS TREATED WITH LOW OR HIGH DOSE RATE BRACHYTHERAPY. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)72381-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Paul N, Paul A, Steitz R, Kreuzer M, Lux-Steiner MC. Selective Self Assembly of Glutamate Molecules on Polyelectrolyte Multilayers. J Phys Chem B 2012; 116:4492-9. [DOI: 10.1021/jp2104648] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Shao W, Paul A, Abbasi S, Chahal PS, Mena JA, Montes J, Kamen A, Prakash S. A novel polyethyleneimine-coated adeno-associated virus-like particle formulation for efficient siRNA delivery in breast cancer therapy: preparation and in vitro analysis. Int J Nanomedicine 2012; 7:1575-86. [PMID: 22619514 PMCID: PMC3356177 DOI: 10.2147/ijn.s26891] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Background Systemic delivery of small interfering RNA (siRNA) is limited by its poor stability and limited cell-penetrating properties. To overcome these limitations, we designed an efficient siRNA delivery system using polyethyleneimine-coated virus-like particles derived from adeno-associated virus type 2 (PEI-AAV2-VLPs). Methods AAV2-VLPs were produced in insect cells by infection with a baculovirus vector containing three AAV2 capsid genes. Using this method, we generated well dispersed AAV2-VLPs with an average diameter of 20 nm, similar to that of the wild-type AAV2 capsid. The nanoparticles were subsequently purified by chromatography and three viral capsid proteins were confirmed by Western blot. The negatively charged AAV2-VLPs were surface-coated with PEI to develop cationic nanoparticles, and the formulation was used for efficient siRNA delivery under optimized transfection conditions. Results PEI-AAV2-VLPs were able to condense siRNA and to protect it from degradation by nucleases, as confirmed by gel electrophoresis. siRNA delivery mediated by PEI-AAV2-VLPs resulted in a high transfection rate in MCF-7 breast cancer cells with no significant cytotoxicity. A cell death assay also confirmed the efficacy and functionality of this novel siRNA formulation towards MCF-7 cancer cells, in which more than 60% of cell death was induced within 72 hours of transfection. Conclusion The present study explores the potential of virus-like particles as a new approach for gene delivery and confirms its potential for breast cancer therapy.
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Lauche R, Cramer H, Paul A, Dobos G, Rampp T. Introducing integrative integrated migraine care (IIMC): A model and case presentation. Eur J Integr Med 2012. [DOI: 10.1016/j.eujim.2011.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Paul A, Nayan M, Khan AA, Shum-Tim D, Prakash S. Angiopoietin-1-expressing adipose stem cells genetically modified with baculovirus nanocomplex: investigation in rat heart with acute infarction. Int J Nanomedicine 2012; 7:663-82. [PMID: 22334788 PMCID: PMC3278230 DOI: 10.2147/ijn.s26882] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The objective of this study was to develop angiopoietin-1 (Ang1)-expressing genetically modified human adipose tissue derived stem cells (hASCs) for myocardial therapy. For this, an efficient gene delivery system using recombinant baculovirus complexed with cell penetrating transactivating transcriptional activator TAT peptide/deoxyribonucleic acid nanoparticles (Bac-NP), through ionic interactions, was used. It was hypothesized that the hybrid Bac- NP(Ang1) system can efficiently transduce hASCs and induces favorable therapeutic effects when transplanted in vivo. To evaluate this hypothesis, a rat model with acute myocardial infarction and intramyocardially transplanted Ang1-expressing hASCs (hASC-Ang1), genetically modified by Bac-NP(Ang1), was used. Ang1 is a crucial pro-angiogenic factor for vascular maturation and neovasculogenesis. The released hAng1 from hASC-Ang1 demonstrated profound mitotic and anti-apoptotic activities on endothelial cells and cardiomyocytes. The transplanted hASC-Ang1 group showed higher cell retention compared to hASC and control groups. A significant increase in capillary density and reduction in infarct sizes were noted in the infarcted hearts with hASC-Ang1 treatment compared to infarcted hearts treated with hASC or the untreated group. Furthermore, the hASC-Ang1 group showed significantly higher cardiac performance in echocardiography (ejection fraction 46.28% ± 6.3%, P < 0.001 versus control, n = 8) than the hASC group (36.35% ± 5.7%, P < 0.01, n = 8), 28 days post-infarction. The study identified Bac-NP complex as an advanced gene delivery vehicle for stem cells and demonstrated its potential to treat ischemic heart disease with high therapeutic index for combined stem cell-gene therapy strategy.
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Parsons A, Bradley A, Reaper L, Jordan C, Paul A, Dowswell G, Dunn J, Naidu B. 195 Patient's experiences of a pre and post surgery rehabilitation programme for lung cancer (Rehabilitation Of lung Cancer (ROC) programme): a qualitative interview study. Lung Cancer 2012. [DOI: 10.1016/s0169-5002(12)70196-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Paul A, Srivastava S, Chen G, Shum-Tim D, Prakash S. Functional Assessment of Adipose Stem Cells for Xenotransplantation Using Myocardial Infarction Immunocompetent Models: Comparison with Bone Marrow Stem Cells. Cell Biochem Biophys 2011; 67:263-73. [DOI: 10.1007/s12013-011-9323-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Minor T, Koetting M, Koetting M, Kaiser G, Efferz P, Lüer B, Paul A. Hypothermic reconditioning by gaseous oxygen improves survival after liver transplantation in the pig. Am J Transplant 2011; 11:2627-34. [PMID: 21906256 DOI: 10.1111/j.1600-6143.2011.03731.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The quality of cold-stored livers declines with the extension of ischemic time and the risk of primary dys- or nonfunction increases. Here, we provide in vivo evidence for the efficacy of the previously developed end-ischemic gaseous oxygen persufflation technique to resuscitate liver grafts after extended storage times. Porcine livers were recovered according to standard multiorgan procurement protocol. Control livers were cold stored in histidine tryptophan ketoglutarate solution for 10 h (cold storage [CS]; n = 6) at 4°C. In the treatment group (n = 6), livers were additionally subjected to hypothermic reconditioning (HR) by gaseous oxygen persufflation via the caval vein for 2 h before transplantation. Viability was assessed by orthotopic liver transplantation and 1 week follow-up. HR significantly improved pretransplant energy charge and initial graft function after transplantation. One week survival after CS was 0% whereas five of six pigs (83%) survived in the HR group. At that time, coagulation parameters were in the normal range and histological analysis disclosed healthy liver tissue with normal trabecular architecture in the treated grafts. Molecular analyses identify the prevention of ischemia-induced decline of cellular autophagy and mitigation of innate immune machinery (high-mobility group protein B1, interferon-β) as operative mechanisms among the protective effects provided by HR.
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Paul A, Binsalamah ZM, Khan AA, Abbasia S, Elias CB, Shum-Tim D, Prakash S. A nanobiohybrid complex of recombinant baculovirus and Tat/DNA nanoparticles for delivery of Ang-1 transgene in myocardial infarction therapy. Biomaterials 2011; 32:8304-18. [DOI: 10.1016/j.biomaterials.2011.07.042] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 07/13/2011] [Indexed: 01/03/2023]
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Binsalamah ZM, Paul A, Khan AA, Prakash S, Shum-Tim D. Intramyocardial sustained delivery of placental growth factor using nanoparticles as a vehicle for delivery in the rat infarct model. Int J Nanomedicine 2011; 6:2667-78. [PMID: 22114497 PMCID: PMC3218580 DOI: 10.2147/ijn.s25175] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Acute myocardial ischemia results in scar formation with ventricular dilatation and eventually heart failure. Placental growth factor (PlGF) is reported to stimulate angiogenesis and improve cardiac function. In this study, it was hypothesized that intramyocardial injection of PlGF contained in nanoparticles can be released at the site of action for an extended time period as a sustained slow-release protective mechanism that accelerates myocardial recovery in a rat model of ischemic cardiomyopathy. METHODS PlGF-loaded chitosan-alginate nanoparticles were injected into an acute myocardial infarction model in rats (n = 10 per group). Transthoracic echocardiography was performed at different time intervals. Enzyme-linked immunosorbent assay was used to measure the serum cytokines levels at 8 weeks. Hearts were stained with Masson's trichrome for scar area analysis. Immunofluorostaining was performed to evaluate the extent of myocardial angiogenesis at the infarction border. PlGF enzyme-linked immunosorbent assay was used to measure the in vitro release kinetics of PlGF-loaded nanoparticles. RESULTS At 8 weeks after coronary ligation, hearts that were treated with PlGF-loaded chitosan-alginate nanoparticles had significant increases in left-ventricular function (P < 0.01), vascular density (P < 0.01), and in the serum level of the anti-inflammatory cytokine interleukin-10 (P < 0.05). There was significant decrease in scar area formation (P < 0.05) and in serum levels of the proinflammatory cytokines tumor necrosis factor-alpha and interleukin-6 (P < 0.01). In vitro PlGF-release kinetic studies showed a sustained release of PlGF from the particles over a 120-hour period. CONCLUSION The use of nanoparticles as a vehicle for PlGF delivery, as opposed to the direct injection of the growth factor after acute myocardial infarction, can provide sustained slow-release PlGF therapy, enhancing the positive effects of the growth factor in the setting of acute myocardial ischemia.
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Weber F, Dammann M, Schmid K, Paul A. Stellenwert der Thyreoidektomie bei Schilddrüsenmetastasen eines Nierenzellkarzinom. Zentralbl Chir 2011. [DOI: 10.1055/s-0031-1289035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Juntermanns B, Radünz S, Treckmann J, Kaiser GM, Paul A, Saner FH. Inzidenz von Sepsis und Pneumonien bei lebertransplantierten Patienten. Zentralbl Chir 2011. [DOI: 10.1055/s-0031-1289085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Juntermanns B, Radünz S, Heuer M, Paul A, Kaiser GM. CA19–9 als Prognosefaktor beim Klatskin-Tumor. Zentralbl Chir 2011. [DOI: 10.1055/s-0031-1289111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Jochmans I, Moers C, Smits JM, Leuvenink HGD, Treckmann J, Paul A, Rahmel A, Squifflet JP, van Heurn E, Monbaliu D, Ploeg RJ, Pirenne J. The prognostic value of renal resistance during hypothermic machine perfusion of deceased donor kidneys. Am J Transplant 2011; 11:2214-20. [PMID: 21834917 DOI: 10.1111/j.1600-6143.2011.03685.x] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Vascular renal resistance (RR) during hypothermic machine perfusion (HMP) is frequently used in kidney graft quality assessment. However, the association between RR and outcome has never been prospectively validated. Prospectively collected RR values of 302 machine-perfused deceased donor kidneys of all types (standard and extended criteria donor kidneys and kidneys donated after cardiac death), transplanted without prior knowledge of these RR values, were studied. In this cohort, we determined the association between RR and delayed graft function (DGF) and 1-year graft survival. The RR (mmHg/mL/min) at the end of HMP was an independent risk factor for DGF (odds ratio 38.1 [1.56-934]; p = 0.026) [corrected] but the predictive value of RR was low, reflected by a c-statistic of the receiver operator characteristic curve of 0.58. The RR was also found to be an independent risk factor for 1-year graft failure (hazard ratio 12.33 [1.11-136.85]; p = 0.004). Determinants of transplant outcome are multifactorial in nature and this study identifies RR as an additional parameter to take into account when evaluating graft quality and estimating the likelihood of successful outcome. However, RR as a stand-alone quality assessment tool cannot be used to predict outcome with sufficient precision.
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Weber F, Dammann M, Paul A. Risikostratifizierung von Patienten mit RET Codon 891 Mutation im Rahmen der Multiple Endokrine Neoplasie Typ 2. Zentralbl Chir 2011. [DOI: 10.1055/s-0031-1289036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Weber F, Dammann M, Görner M, Hüttmann A, Schmid K, Paul A. Interdisziplinäre Behandlungskonzepte bei primären Lymphomen der Schilddrüse. Zentralbl Chir 2011. [DOI: 10.1055/s-0031-1289098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Vernadakis S, Sotiropoulos GC, Brokalaki EI, Esser S, Kaiser GM, Cicinnati VR, Beckebaum S, Paul A, Mathé Z. Long-term outcomes of liver transplant patients with human immunodeficiency virus infection and end-stage-liver-disease: single center experience. Eur J Med Res 2011; 16:342-8. [PMID: 21813377 PMCID: PMC3351986 DOI: 10.1186/2047-783x-16-8-342] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Objective Orthotopic-liver-transplantation (OLT) in patients with Human-Immunodeficiency-Virus infection (HIV) and end-stage-liver-disease (ESDL) is rarely reported. The purpose of this study is to describe our institutional experience on OLT for HIV positive patients. Material and methods This is a retrospective study of all HIV-infected patients who underwent OLT at the University Hospital of Essen, from January 1996 to December 2009. Age, sex, HIV transmission-way, CDC-stage, etiology of ESDL, concomitant liver disease, last CD4cell count and HIV-viral load prior to OLT were collected and analysed. Standard calcineurin-inhibitors-based immunosuppression was applied. All patients received anti-fungal and anti-pneumocystis carinii pneumonia prophylaxis post-OLT. Results Eight transplanted HIV-infected patients with a median age of 46 years (range 35-61 years) were included. OLT indications were HCV (n = 5), HBV (n = 2), HCV/HBV/HDV-related cirrhosis (n = 1) and acute liver-failure (n = 1). At OLT, CD4 cell-counts ranged from 113-621 cells/μl, and HIV viral-loads from < 50-175,000 copies/ml. Seven of eight patients were exposed to HAART before OLT. Patients were followed-up between 1-145 months. Five died 1, 3, 10, 31 and 34 months after OLT due to sepsis and graftfailure respectively. Graft-failure causes were recurrent hepatic-artery thrombosis, HCV-associated hepatitis, and chemotherapy-induced liver damage due to Hodgkin-disease. One survivor is relisted for OLT due to recurrent chronic HCV-disease but non-progredient HIV-infection 145 months post-OLT. Two other survivors show stable liver function and non-progredient HIV-disease under HAART 21 and 58 months post-OLT. Conclusions OLT in HIV-infected patients and ESLD is an acceptable therapeutic option in selected patients. Long-term survival can be achieved without HIV disease-progression under antiretroviral therapy and management of the viral hepatitis co-infection.
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Binsalamah Z, Paul A, Khan A, Prakash S, Shum-Tim D. 702 Nanoparticle-mediated placental growth factor delivery as a novel therapy for acute myocardial infarction. Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.08.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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Paul A, Kubas A, Jelsch C, Kubicki M, Lecomte C. Exprimental and theoretical charge density studies and topological analysis of 2-methyl-4-nitro-1-phenyl-1 H-imidazole-5-carbonitryle: case of antiparallel cyano-cyano interaction. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311088726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Borowiak T, Dutkiewicz G, Paul A, Kubicki M, Misterkiewicz B. Charge density studies on N- n-butyltetrachlorophthalimide. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311086995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Steinmann J, Kaase M, Gatermann S, Popp W, Steinmann E, Damman M, Paul A, Saner F, Buer J, Rath PM. Outbreak due to a Klebsiella pneumoniae strain harbouring KPC-2 and VIM-1 in a German university hospital, July 2010 to January 2011. Euro Surveill 2011. [DOI: 10.2807/ese.16.33.19944-en] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We describe the epidemiology and characteristics of the pathogen and patients (n=7) associated with an outbreak of a carbapenem-resistant Klebsiella pneumoniae (CRKP) strain in a German university hospital from July 2010 to January 2011. Species identification and detection of carbapenem resistance were carried out using standard microbiological procedures. Carbapenemases were detected by phenotypic methods and specific polymerase chain reactions (PCRs). DNA fingerprinting profiles were performed with repetitive sequence-based PCR. Medical records of colonised or infected patients were retrospectively reviewed. Antibiotic resistance profiles, PCR-specific amplification products and genotyping demonstrated that the outbreak occurred because of the spread of a single CRKP clone harbouring both KPC-2 and VIM-1. Five of the seven patients had invasive infections with the CRKP strain; the deaths of four of them were directly related to the infection. Early implementation of infection control interventions brought about efficient containment of further cross-transmission. Rapid dissemination of carbapenemase-producing Enterobacteriaceae is a serious concern in patient care and is a problem that has emerged in western Europe.
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Steinmann J, Kaase M, Gatermann S, Popp W, Steinmann E, Damman M, Paul A, Saner F, Buer J, Rath P. Outbreak due to a Klebsiella pneumoniae strain harbouring KPC-2 and VIM-1 in a German university hospital, July 2010 to January 2011. Euro Surveill 2011; 16:19944. [PMID: 21871227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
We describe the epidemiology and characteristics of the pathogen and patients (n=7) associated with an outbreak of a carbapenem-resistant Klebsiella pneumoniae (CRKP) strain in a German university hospital from July 2010 to January 2011. Species identification and detection of carbapenem resistance were carried out using standard microbiological procedures. Carbapenemases were detected by phenotypic methods and specific polymerase chain reactions (PCRs). DNA fingerprinting profiles were performed with repetitive sequence-based PCR. Medical records of colonised or infected patients were retrospectively reviewed. Antibiotic resistance profiles, PCR-specific amplification products and genotyping demonstrated that the outbreak occurred because of the spread of a single CRKP clone harbouring both KPC-2 and VIM-1. Five of the seven patients had invasive infections with the CRKP strain; the deaths of four of them were directly related to the infection. Early implementation of infection control interventions brought about efficient containment of further cross-transmission. Rapid dissemination of carbapenemase-producing Enterobacteriaceae is a serious concern in patient care and is a problem that has emerged in western Europe.
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Nayan M, Paul A, Chen G, Chiu RCJ, Prakash S, Shum-Tim D. Superior therapeutic potential of young bone marrow mesenchymal stem cells by direct intramyocardial delivery in aged recipients with acute myocardial infarction: in vitro and in vivo investigation. J Tissue Eng 2011; 2011:741213. [PMID: 21808722 PMCID: PMC3143440 DOI: 10.4061/2011/741213] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Accepted: 05/27/2011] [Indexed: 11/20/2022] Open
Abstract
Introduction. Bone-marrow-derived mesenchymal stem cells (MSCs) have been studied for treatment of myocardial infarction (MI). Since MSCs from older donors show quantitative and qualitative senescent changes, we hypothesized that a better outcome may be achieved if aged recipients are given MSCs obtained from young donors, rather than using their own autologous MSCs.
Methods. In vitro studies compared properties of young and old MSCs. Aged rats randomized into 3 groups underwent coronary artery ligations and were then injected with either old (O) or young (Y) MSCs, or ligation alone. Echocardiography evaluated ejection fractions (EF). At 16 weeks, scar deposition was analyzed. Results. Old MSCs exhibited decreased cell viability, proliferation, and differentiation potentials. EF significantly improved early in both cell therapy groups (P < .05). However, at later stages of the study, group Y showed significantly better function which correlated with decreased scar deposition.
Conclusions. The significant difference between young and old cells indicates the possible advantage for allotransplanting MSCs from young donors to elderly patients with MI.
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Khan AA, Paul A, Abbasi S, Prakash S. Mitotic and antiapoptotic effects of nanoparticles coencapsulating human VEGF and human angiopoietin-1 on vascular endothelial cells. Int J Nanomedicine 2011; 6:1069-81. [PMID: 21698074 PMCID: PMC3118680 DOI: 10.2147/ijn.s15054] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Research towards the application of nanoparticles as carrier vehicles for the delivery of therapeutic agents is increasingly gaining importance. The angiogenic growth factors, human vascular endothelial growth factor (VEGF) and human angiopoietin-1 are known to prevent vascular endothelial cell apoptosis and in fact to stimulate human vascular endothelial cell (HUVEC) proliferation. This paper aims to study the combined effect of these bioactive proteins coencapsulated in human serum albumin nanoparticles on HUVECs and to evaluate the potential application of this delivery system towards therapeutic angiogenesis. METHODS AND RESULTS The angiogenic proteins, human VEGF and human angiopoietin-1, were coencapsulated in albumin nanoparticles for better controlled delivery of the proteins. The application of a nanoparticle system enabled efficient and extended-release kinetics of the proteins. The size of the nanoparticles crosslinked with glutaraldehyde was 101.0 ± 0.9 nm and the zeta potential was found to be -18 ± 2.9 mV. An optimal concentration of glutaraldehyde for the nanoparticle coating process was determined, and this provided stable and less toxic nanoparticles as protein carriers. The results of the study indicate that nanoparticles crosslinked with glutaraldehyde produced nanoparticles with tolerable toxicity which provided efficient and controlled release of the coencapsulated proteins. The nanoparticles were incubated for two weeks to determine the release profiles of the proteins. At the end of the two-week incubation period, it was observed that 49% ± 1.3% of human angiopoietin-1 and 59% ± 2.1% of human VEGF had been released from the nanoparticles. The proliferation and percent apoptosis of the HUVECs in response to released proteins was observed. CONCLUSION The results indicate that the released proteins were biologically active and the combined application of both the proteins demonstrated a significant highly proliferative and antiapoptotic effect on HUVECs as compared with the effect demonstrated by the individual proteins released. These studies could serve as a basis to encourage further research into the potential in vivo application of these protein-loaded nanoparticles in the field of therapeutic angiogenesis.
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Paul A, John H, Oakley L, Deeley D, Samaranayaka M, Klocke R, Murley A, Webb E, Al-Allaf A, Panchal S, Moorthy A, Samanta A, Rajak R, Zaman M, Camilleri J, Nash J, Negi A, Jones S, Hull DN, Smith AS, Taylor PC, Hughes L, Done J, Young A, Colijn E, Franssen M, Rabsztyn PRI, van den Ende CHM, Williams A, Graham A, Davies S, Longrigg K, Dagg A, Lyons C, Bowen C, Wright S, Cornell P, Richards S. BHPR - audit/service delivery: 93. Taking Care of the Foot Health of Rheumatology Patients: Where Do We Stand Now? Rheumatology (Oxford) 2011. [DOI: 10.1093/rheumatology/ker044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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