76
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Hanke T, Krauss G, Träutlein D, Wild B, Bratschitsch R, Leitenstorfer A. Efficient nonlinear light emission of single gold optical antennas driven by few-cycle near-infrared pulses. PHYSICAL REVIEW LETTERS 2009; 103:257404. [PMID: 20366283 DOI: 10.1103/physrevlett.103.257404] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Indexed: 05/06/2023]
Abstract
Individual nanometer-sized plasmonic antennas are excited resonantly with few-cycle laser pulses in the near infrared. Intense third-harmonic emission of visible light prevails for fundamental photon energies below 1.1 eV. Interband luminescence and second harmonic generation occur solely at higher driving frequencies. We attribute these findings to multiphoton resonances with the d-band transitions of gold. The strong third-order signal allows direct measurement of a subcycle plasmon dephasing time of 2 fs, highlighting the efficient radiation coupling and broadband response of the devices.
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77
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Bernhardt A, Lode A, Mietrach C, Hempel U, Hanke T, Gelinsky M. In vitro osteogenic potential of human bone marrow stromal cells cultivated in porous scaffolds from mineralized collagen. J Biomed Mater Res A 2009; 90:852-62. [PMID: 18615470 DOI: 10.1002/jbm.a.32144] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Porous 3D structures from mineralized collagen were fabricated applying a procedure in which collagen fibril reassembly and precipitation of nanocrystalline hydroxyapatite (HA) occur simultaneously. The resulting matrices were evaluated in vitro with respect to their suitability as scaffolds for bone tissue engineering. We found a high capacity of the material to bind serum proteins as well as to absorb Ca2+ ions, which could be advantageous to promote cell attachment, growth, and differentiation. Human bone marrow stromal cells (hBMSCs) were seeded onto the 3D scaffolds and cultivated for 4 weeks in the presence and absence of osteogenic supplements. We studied viability, proliferation, and osteogenic differentiation in terms of total lactate dehydrogenase (LDH) activity, DNA content, and alkaline phosphatase (ALP) activity. Furthermore, the expression for bone-related genes (ALP, bone sialo protein II (BSP II), and osteocalcin) was analyzed. In our investigation we found a 2.5-fold to 5-fold raise in DNA content and an increase of ALP activity for osteogenic induced hBMSC on collagen HA scaffolds. The expression of ALP and BSP II in these cells was also stimulated in the course of cultivation; however, we did not detect an upregulation of osteocalcin gene expression. These data suggest, that porous collagen HA scaffolds are suitable for the expansion and osteogenic differentiation of hBMSC and are therefore promising candidates for application as bone grafts.
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78
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Rosario M, Borthwick N, Bridgeman A, Watkins D, Colloca S, Quakkelaar ED, Liljestrom P, Nicosia A, Melief CJ, Hanke T. P17-05. Dealing with HIV-1 diversity. Retrovirology 2009. [PMCID: PMC2767789 DOI: 10.1186/1742-4690-6-s3-p287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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79
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Saubi N, Im E, Fernandez-Lloris R, Gil O, Cardona P, Gatell J, Hanke T, Joseph J. P17-17. Newborn mice vaccination with rBCG:HIVA + MVA:HIVA enhances HIV-1-specific immune responses. Influence of age and immunization routes. Retrovirology 2009. [PMCID: PMC2767802 DOI: 10.1186/1742-4690-6-s3-p299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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80
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Krauss G, Hanke T, Sell A, Träutlein D, Leitenstorfer A, Selm R, Winterhalder M, Zumbusch A. Compact coherent anti-Stokes Raman scattering microscope based on a picosecond two-color Er:fiber laser system. OPTICS LETTERS 2009; 34:2847-9. [PMID: 19756125 DOI: 10.1364/ol.34.002847] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We present a compact coherent anti-Stokes Raman scattering microscope based on a widely tunable picosecond Er:fiber laser. Intense and bandwidth-limited 1 ps pump pulses at a center wavelength of 775 nm are generated via frequency mixing within the broadband fundamental at 1.55 microm. Narrowband Stokes pulses are obtained by frequency shifting of solitons in a highly nonlinear bulk fiber and subsequent second-harmonic generation. The tuning range from 850 nm to 1100 nm gives access to vibrational resonances between 1150 cm(-1) and 3800 cm(-1). A first imaging application in the spectral region of CH stretch vibrations is demonstrated.
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81
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Hanke T, Bringer S, Sahm H, Bott M. Establishment of oligonucleotide-based DNA microarrays of the Gluconobacter oxydans 621H genome: first results on the influence of pH and oxygen on the transcriptome. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200990081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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82
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Heringlake M, Kox T, Poeling J, Klaus S, Hanke T, Franz N, Eberhardt F, Heinze H, Armbruster FP, Bahlmann L. The effects of physical exercise on plasma levels of relaxin, NTproANP, and NTproBNP in patients with ischemic heart disease. Eur J Med Res 2009; 14:106-12. [PMID: 19380280 PMCID: PMC3352058 DOI: 10.1186/2047-783x-14-3-106] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The insulin-like and vasodilatatory polypeptide relaxin (RLX), formerly known as a pregnancy hormone, has gained interest as a potential humoral mediator in human heart failure. Controversy exists about the relation between plasma levels of RLX and the severity of heart failure. The present study was designed to determine the course of RLX, atrial, and brain natriuretic peptide (NT-proANP and NT-proBNP) during physical exercise in patients with ischemic heart disease (IHD) and to relate hormone levels to peak cardiac power output (CPO) as a measure of cardiopulmonary function with prognostic relevance. 40 patients with IHD were studied during right-heart-catheterization at rest and during supine bicycle ergometry. RLX, NTproBNP, and NTproANP were determined before, during exercise, and after recovery. NT-proANP and NT-proBNP levels increased during maximal charge, and recovery while RLX levels decreased. Cardiac power output at maximal charge correlated inversely with NTproANP and NTproBNP but positively with RLX. Patients with high degree heart failure (CPO < 1.96 W) had higher NTproANP and NTproB-NP and lower RLX levels than patients with low degree heart failure. While confirming the role of NTproANP and NTproBNP as markers for the severity of heart failure, the present data do not support the concept that plasma levels of RLX are related to the severity of myocardial dysfunction and that systemic RLX acts as a compensatory vasodilatatory response hormone in ischemic heart disease.
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83
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Bernhardt A, Despang F, Lode A, Demmler A, Hanke T, Gelinsky M. Proliferation and osteogenic differentiation of human bone marrow stromal cells on alginate-gelatine-hydroxyapatite scaffolds with anisotropic pore structure. J Tissue Eng Regen Med 2009; 3:54-62. [PMID: 19012272 DOI: 10.1002/term.134] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Porous mineralized scaffolds are required for various applications in bone engineering. In particular, tube-like pores with controlled orientation inside the scaffold may support homogeneous cell seeding as well as sufficient nutrient supply and may facilitate blood vessel ingrowth. Scaffolds with parallely orientated tube-like pores were generated by diffusion-controlled ionotropic gelation of alginate. Incorporation of hydroxyapatite (HA) during the gelation process yielded stable scaffolds with an average pore diameter of approximately 90 microm. To evaluate the potential use of alginate-gelatine-HA scaffolds for bone tissue engineering, in vitro tests with human bone marrow stromal cells (hBMSCs) were carried out. We analysed biocompatibility and cell penetration into the capillary pores by microscopic methods. hBMSCs were also cultivated on alginate-gelatine-HA scaffolds for 3 weeks in the presence and absence of osteogenic supplements. We studied proliferation and osteogenic differentiation in terms of total lactate dehydrogenase (LDH) activity, DNA content and alkaline phosphatase (ALP) activity and found a 10-14-fold increase of cell number after 2 weeks of cultivation, as well as an increase of specific ALP activity for osteogenic-induced hBMSCs. Furthermore, the expression of bone-related genes [ALP, bone sialoprotein II (BSPII)] was analysed. We found an increase of ALP as well as BSPII expression for osteogenic-induced hBMSCs on alginate-gelatin-HA scaffolds.
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84
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Hanke T, Misfeld M, Karluss A, Charitos EI, Neumeier I, Hagemann A, Graf B, Stierle U, Sievers HH. New insights into surgical atrial fibrillation ablation therapy: Initial experience with a novel permanently implantable heart rhythm monitor device. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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85
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Hanke T, Charitos EI, Stierle U, Hemmer W, Lange R, Hörer J, Hübler M, Takkenberg J, Bogers AJJC, Sievers HH. Effect of autograft reinforcement techniques on autograft durability and function after the Ross procedure: Results from the German-Dutch Ross Registry. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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86
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Charitos EI, Hanke T, Misfeld M, Stierle U, Sievers HH. Midterm results after valve sparing aortic root remodeling with partial preservation of the intact native aortic sinuses. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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87
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Charitos EI, Hemmer W, Rein JG, Takkenberg J, Bogers AJJC, Hanke T, Boehm JO, Botha CA, Bechtel JFM, Erasmi A, Misfeld M, Robinson DR, Lange R, Hörer J, Moritz A, Özaslan F, Wahlers T, Franke UF, Hetzer R, Hübler M, Ziemer G, Graf B, Ross DN, Stierle U, Sievers HH. Reoperations on the autograft and homograft after the Ross procedure: A report from the German-Dutch Ross registry. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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88
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Bechtel JFM, Charitos EI, Hanke T, Misfeld M, Schmidtke C, Kraatz EG, Sievers HH. Short-term hemodynamic support with bearingless, magnetically levitated paracorporal centrifugal pumps. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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89
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Hörer J, Hanke T, Takkenberg J, Stierle U, Sievers HH, Lange R. Impact of changes in neoaortic root diameters on the development of aortic regurgitation in children following the Ross operation – results from the Dutch-German Ross registry. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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90
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Mohamed SA, Schoellermann K, Schult-Badusche D, Hanke T, Wenzel BE, Kuehnel W, Sievers HH. Multiplex-screening of matrixmetalloproteinases in different areas of thoracic aortic aneurysm in bicuspid and tricuspid aortic valve. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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91
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Mohamed SA, Misfeld M, Hanke T, Charitos EI, Radtke A, Bullerdiek J, Belge G, Kuehnel W, Sievers HH. Caspase-3 related vascular smooth muscle cell apoptosis in convex versus concave site of bicuspid aortic valve ascending aortic aneurysm. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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92
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Hörer J, Hanke T, Takkenberg J, Stierle U, Sievers HH, Lange R. Homograft performance in 84 pediatric Ross patients – results from the Dutch-German Ross registry. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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93
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Hanke T, Charitos EI, Misfeld M, Bechtel JFM, Schmidtke C, Kraatz EG, Stierle U, Sievers HH. The original subcoronary technique: Single center results of the Ross operation in 501 patients. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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94
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Misfeld M, Sievers H, Hadlak M, Gorski A, Hanke T. Rate of Paraplegia and Mortality in Elective Descending and Thoracoabdominal Aortic Repair in the Modern Surgical Era. Thorac Cardiovasc Surg 2008; 56:342-7. [DOI: 10.1055/s-2008-1038704] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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95
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Gao Y, Reischmann S, Huber J, Hanke T, Bratschitsch R, Leitenstorfer A, Mecking S. Encapsulating of single quantum dots into polymer particles. Colloid Polym Sci 2008. [DOI: 10.1007/s00396-008-1899-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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96
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Thomay T, Hanke T, Tomas M, Sotier F, Beha K, Knittel V, Kahl M, Whitaker KM, Gamelin DR, Leitenstorfer A, Bratschitsch R. Colloidal ZnO quantum dots in ultraviolet pillar microcavities. OPTICS EXPRESS 2008; 16:9791-4. [PMID: 18575547 DOI: 10.1364/oe.16.009791] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Three dimensional light confinement and distinct pillar microcavity modes in the ultraviolet have been observed in pillar resonators with embedded colloidal ZnO quantum dots fabricated by focused ion beam milling. Results from a waveguide model for the mode patterns and their spectral positions are in excellent agreement with the experimental data.
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97
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Hanke T, Sier H, Bechtel JFM, Sievers HH, Misfeld M. Acute type A aortic dissection – is in hospital mortality related to the surgical procedure? Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1038052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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98
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Hanke T, Takkenberg JJM, Rein J, Hemmer W, Botha CA, Stierle U, Lange R, Moritz A, Ziemer G, Hetzer R, Bogers A, Sievers HH. First report of the Dutch-German Ross Registry – the pulmonary homograft in 1162 patients. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1037706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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99
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Hanke T, Stierle U, Sievers HH, Misfeld M. The preserved aortic valve – the Yacoub and David approach. Comparison of two different techniques. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1037704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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100
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Hanke T, Misfeld M, Stierle U, Rein J, Hemmer W, Botha CA, Moritz A, Lange R, Hetzer R, Ziemer G, Sievers HH. The fate of the bicuspid aortic valve in Ross partients. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1037705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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