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Spiaggia G, Taladriz-Blanco P, Hengsberger S, Septiadi D, Geers C, Lee A, Rothen-Rutishauser B, Petri-Fink A. A Near-Infrared Mechanically Switchable Elastomeric Film as a Dynamic Cell Culture Substrate. Biomedicines 2022; 11:biomedicines11010030. [PMID: 36672538 PMCID: PMC9855853 DOI: 10.3390/biomedicines11010030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/09/2022] [Accepted: 12/17/2022] [Indexed: 12/25/2022] Open
Abstract
Commercial static cell culture substrates can usually not change their physical properties over time, resulting in a limited representation of the variation in biomechanical cues in vivo. To overcome this limitation, approaches incorporating gold nanoparticles to act as transducers to external stimuli have been employed. In this work, gold nanorods were embedded in an elastomeric matrix and used as photothermal transducers to fabricate biocompatible light-responsive substrates. The nanocomposite films analysed by lock-in thermography and nanoindentation show a homogeneous heat distribution and a greater stiffness when irradiated with NIR light. After irradiation, the initial stiffness values were recovered. In vitro experiments performed during NIR irradiation with NIH-3T3 fibroblasts demonstrated that these films were biocompatible and cells remained viable. Cells cultured on the light stiffened nanocomposite exhibited a greater proliferation rate and stronger focal adhesion clustering, indicating increased cell-surface binding strength.
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Affiliation(s)
- Giovanni Spiaggia
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Patricia Taladriz-Blanco
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
- International Iberian Nanotechnology Laboratory (INL), Water Quality Group, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal
- Correspondence: (P.T.-B.); (A.P.-F.)
| | - Stefan Hengsberger
- School of Engineering and Architecture (HEIA-FR), HES-SO, University of Applied Science and Arts in Western Switzerland, Boulevard de Pérolles 80, 1700 Fribourg, Switzerland
| | - Dedy Septiadi
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Christoph Geers
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Aaron Lee
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | | | - Alke Petri-Fink
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
- Correspondence: (P.T.-B.); (A.P.-F.)
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Spiaggia G, Taladriz-Blanco P, Septiadi D, Ortuso RD, Lee A, Trappe V, Rothen-Rutishauser B, Petri-Fink A. Aligned and Oriented Collagen Nanocomposite Fibers as Substrates to Activate Fibroblasts. ACS APPLIED BIO MATERIALS 2021; 4:8316-8324. [PMID: 35005948 DOI: 10.1021/acsabm.1c00844] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Purified collagen possesses weak mechanical properties, hindering its broad application in tissue engineering. Strategies based on manipulating the hydrogel to induce fiber formation or incorporate nanomaterials have been proposed to overcome this issue. Herein, we use a microfluidic device to fabricate, for the first time, collagen hydrogels with aligned and oriented fibers doped with gold nanoparticles and carbon nanotubes. Results based on rheology, atomic force microscopy, and scanning electron microscopy reveal the formation of aligned and oriented collagen fibers possessing greater rigidity and stiffness on the doped hydrogels in comparison with native collagen. The mechanical properties of the hydrogels increased with the nanomaterial loading percentage and the stiffest formulations were those prepared in the presence of carbon nanotubes. We further evaluate the in vitro response of NIH-3T3 fibroblasts to the change in stiffness. The cells were found to be viable on all substrates with directional cell growth observed for the carbon nanotube-doped collagen fibers. No significant differences in the cell area, aspect ratio, and intensification of focal adhesions driven by the increase in stiffness were noted. Nonetheless, fibroblast proliferation and secretion of TGF-β1 were greater on the hydrogels doped with carbon nanotubes. This nanomaterial-collagen composite provides unique features for cell and tissue substrate applications.
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Affiliation(s)
- Giovanni Spiaggia
- Adolphe Merkle Institute, Université de Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Patricia Taladriz-Blanco
- Adolphe Merkle Institute, Université de Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Dedy Septiadi
- Adolphe Merkle Institute, Université de Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Roberto Diego Ortuso
- Adolphe Merkle Institute, Université de Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Aaron Lee
- Adolphe Merkle Institute, Université de Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Veronique Trappe
- Department of Physics, University of Fribourg, Chemin du Musée 3, 1700 Fribourg, Switzerland
| | | | - Alke Petri-Fink
- Adolphe Merkle Institute, Université de Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland.,Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
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Coassin M, Lambiase A, Micera A, Tirassa P, Aloe L, Bonini S. Nerve growth factor modulates in vitro the expression and release of TGF-beta1 by amniotic membrane. Graefes Arch Clin Exp Ophthalmol 2005; 244:485-91. [PMID: 16158307 DOI: 10.1007/s00417-005-0098-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2005] [Revised: 06/08/2005] [Accepted: 07/18/2005] [Indexed: 01/15/2023] Open
Abstract
PURPOSE To determinate the basal production of NGF and TGF-beta1 by amniotic membrane (AM) and to verify the presence of NGF receptors (trkA(NGFR) and p75(NTR)) in AM. Thereafter, to evaluate in an in vitro model if increasing concentrations of NGF are able to stimulate AM to produce and release TGF-beta1. METHODS Immunohistochemistry, ELISA, in situ hybridization and PCR analysis for NGF, TGF-beta1, trkA(NGFR) and p75(NTR) were performed to study their presence in AM. Amniotic membranes were stimulated in vitro with increasing concentrations of NGF. After 24 h, the amount of TGF- beta1 in the AM tissue and in the culture medium was investigate. RESULTS AM expressed TGF-beta1, NGF, trkA(NGFR) and p75(NTR) mRNAs and proteins and released basal amounts of NGF and TGF-beta1 in the medium. Stimulation of AM by addition of NGF induced a significant (P<0.05) increase of TGF-beta1 mRNA/protein in AM tissue as well as a release of TGF-beta1 protein into the culture medium, in a dose-dependent fashion. CONCLUSIONS This study demonstrates that amniotic membrane releases basal amounts of NGF and TGF-beta1 and expresses NGF receptors . Moreover, the addition of NGF to the culture medium stimulates the amniotic membrane to significantly increase the production and release of TGF-beta1.
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Affiliation(s)
- Marco Coassin
- Interdisciplinary Center for Biomedical Research (CIR), Laboratory of Ophthalmology, University of Rome Campus Bio-Medico, Via E Longoni, 83, 00155, Rome, Italy
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Abstract
UNLABELLED Interferon-gamma inhibits experimental renal fibrosis. BACKGROUND Recent evidence has implicated myofibroblasts as a cell type responsible for the laying down of extracellular matrix components during fibrosis in a number of organs. In this study, we examined the capacity of interferon-gamma (IFN-gamma) to inhibit the activation of fibroblasts to the myofibroblastic phenotype and hence reduce the extent of renal scarring in the rat subtotal nephrectomy (SNx) model using a novel method of intrarenal delivery. METHODS Rats were divided into four groups: sham, SNx (group 1), SNx + drug vehicle (group 2) and SNx + IFN-gamma (400 units/day; group 3) for 30 days. Rats were sacrificed on days 15, 30, 45, and 90 following SNx. RESULTS Clinical data showed a marked reduction in proteinuria in the group treated with IFN-gamma (161 vs. 280 mg/24 hr by day 45, P < 0.01) and a preservation of the creatinine clearance (1.16 vs. 0. 84 ml/min by day 45, P < 0.05) when compared to the SNx or SNx + vehicle groups throughout the time course. Immunohistochemical staining for alpha-smooth muscle actin (alpha-SMA) revealed a reduction in myofibroblastic cell types (6.5 +/- 3.1% glomerular alpha-SMA in group 3 compared with 14.8 +/- 4.2% glomerular alpha-SMA in group 2, P < 0.05, 3.8 +/- 1.4% tubulointerstitial alpha-SMA in group 3 compared with 8.8 +/- 2.0% tubulointerstitial alpha-SMA in group 2 on day 45, P < 0.05). There was also a reduction in immunostaining for collagens III and IV in the IFN-gamma-treated group. Scoring for both glomerulosclerosis and tubulointerstitial fibrosis in the IFN-gamma group (group 3) was lower than the other two operated groups. CONCLUSIONS We conclude that IFN-gamma, administered at a dose of 400 units/day, has a strong inhibitory effect on myofibroblasts and that as a possible result of this action, renal fibrosis is reduced and renal function is preserved in the rat SNx model. The IFN-gamma renoprotective effect lasted only for the extent of its administration and subsided when discontinued.
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Affiliation(s)
- S D Oldroyd
- Division of Clinical Sciences NGH, Sheffield Kidney Institute, University of Sheffield, Northern General Hospital, England, United Kingdom.
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Ditzian-Kadanoff R. Testicular-associated immune deviation and prevention of adjuvant-induced arthritis by three tolerization methods. Scand J Immunol 1999; 50:150-8. [PMID: 10447919 DOI: 10.1046/j.1365-3083.1999.00567.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A new tolerizing effect, testicular-associated immune deviation (TAID), was produced in rats by injecting antigen, emulsified with adjuvant, into the testicle. TAID abrogated the delayed hypersensitivity response to subsequent immunization. This study also assessed the effect of anterior chamber-associated immune deviation (ACAID), the aforementioned TAID and an equivalent tolerization method named alternative in vitro immune deviation (AVID), on adjuvant-induced arthritis (AIA). ACAID was produced by introducing antigen, emulsified with adjuvant, into the anterior chamber of the eye. AVID was achieved by exposing peritoneal exudate cells to antigen in the presence of fetal calf serum in vitro and then injecting the cells intraperitoneally. Antigen in adjuvant was administered intradermally to Dark Agouti rats, which are normally susceptible to AIA. One week after treatment with ACAID, TAID or AVID, the rats became resistant to AIA. The presence of neutralizing antibody to transforming growth factor-beta2 (TGF-beta2) in the culture abrogated the AVID effect. We concluded that introducing an antigen to the testicle induces immune deviation, and that prior introduction of the antigen to macrophages in an appropriate immune suppressive context, such as ACAID, TAID or AVID, prevents AIA.
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Affiliation(s)
- R Ditzian-Kadanoff
- Department of Medicine, Mount Sinai Hospital, Chicago and Department of Medicine, Chicago Medical School, Finch University, North Chicago, IL, USA
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Thom SB, Myers JS, Rapuano CJ, Eagle RC, Siepser SB, Gomes JA. Effect of topical anti-transforming growth factor-beta on corneal stromal haze after photorefractive keratectomy in rabbits. J Cataract Refract Surg 1997; 23:1324-30. [PMID: 9423903 DOI: 10.1016/s0886-3350(97)80110-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE To determine the relationship between anti-transforming growth factor-beta (anti-TGF-beta) antibodies and the amount of corneal stromal haze after excimer laser photorefractive keratectomy (PRK). SETTING Wills Eye Hospital, Philadelphia, Pennsylvania, USA. METHODS Nineteen rabbits had bilateral PRK. Dichlorotriazinyl fluorescein was used to stain the exposed stroma; all rabbits were then treated with antibiotic ointment for 4 days. Ten rabbits were randomized to treatment with topical anti-TGF-beta1, -beta2, and -beta3 antibody 50 microg three times a day for 4 days; the others received diluent three times a day for 4 days. Stromal haze was graded weekly for 8 weeks on a 0 to 4+ scale. At the end of the study, all corneas were examined histopathologically. RESULTS All treated eyes developed appreciable haze. Seven control rabbits and one antibody-treated rabbit had an epithelial erosion (P = .00001). Antibody-treated rabbits had significantly less haze at 3, 4, and 5 weeks (right eyes) and 3, 4, 5, 7 and 8 weeks (left eyes) (P < .05). Histopathology and fluorescence microscopy showed subepithelial collagen deposition consistent with clinical haze. CONCLUSIONS Topical anti-TGF-beta antibody reduced stromal haze after PRK in the rabbit model and may be clinically beneficial in humans.
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Affiliation(s)
- S B Thom
- Cataract and Primary Eye Care Service, Wills Eye Hospital, Philadelphia, Pennsylvania 19107, USA
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