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Pal A, Oyane A, Nakamura M, Koga K, Nishida E, Miyaji H. Fluoride-Incorporated Apatite Coating on Collagen Sponge as a Carrier for Basic Fibroblast Growth Factor. Int J Mol Sci 2024; 25:1495. [PMID: 38338772 PMCID: PMC10855894 DOI: 10.3390/ijms25031495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/21/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
Coating layers consisting of a crystalline apatite matrix with immobilized basic fibroblast growth factor (bFGF) can release bFGF, thereby enhancing bone regeneration depending on their bFGF content. We hypothesized that the incorporation of fluoride ions into apatite crystals would enable the tailored release of bFGF from the coating layer depending on the layer's fluoride content. In the present study, coating layers consisting of fluoride-incorporated apatite (FAp) crystals with immobilized bFGF were coated on a porous collagen sponge by a precursor-assisted biomimetic process using supersaturated calcium phosphate solutions with various fluoride concentrations. The fluoride content in the coating layer increased with the increasing fluoride concentration of the supersaturated solution. The increased fluoride content in the coating layer reduced its solubility and suppressed the burst release of bFGF from the coated sponge into a physiological salt solution. The bFGF release was caused by the partial dissolution of the coating layer and, thus, accompanied by the fluoride release. The concentrations of released bFGF and fluoride were controlled within the estimated effective ranges in enhancing bone regeneration. These findings provide useful design guidelines for the construction of a mineralized, bFGF-releasing collagen scaffold that would be beneficial for bone tissue engineering, although further in vitro and in vivo studies are warranted.
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Affiliation(s)
- Aniruddha Pal
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan; (A.P.); (M.N.); (K.K.)
| | - Ayako Oyane
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan; (A.P.); (M.N.); (K.K.)
| | - Maki Nakamura
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan; (A.P.); (M.N.); (K.K.)
| | - Kenji Koga
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan; (A.P.); (M.N.); (K.K.)
| | - Erika Nishida
- Section for Clinical Education, Faculty of Dental Medicine, Hokkaido University, N13 W7 Kita-ku, Sapporo 060-8586, Japan; (E.N.); (H.M.)
| | - Hirofumi Miyaji
- Section for Clinical Education, Faculty of Dental Medicine, Hokkaido University, N13 W7 Kita-ku, Sapporo 060-8586, Japan; (E.N.); (H.M.)
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Komura M, Komura H, Ishimaru T, Konishi K, Komuro H, Hoshi K, Takato T. Tracheal cartilage growth promotion by intra-tracheal administration of basic FGF. Pediatr Surg Int 2020; 36:33-41. [PMID: 31555864 DOI: 10.1007/s00383-019-04576-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/12/2019] [Indexed: 11/28/2022]
Abstract
PURPOSE This study aimed to investigate whether intra-tracheal administration of basic fibroblast growth factor (b-FGF) promotes the growth of tracheal cartilage. METHODS Trachea of 4-week old mice were intubated and 2.5 μg b-FGF administered (Group 4) for periods from 1 to 5 days. Cervical tracheal outer diameter and tracheal ring length were compared in Group 1 (no intervention), Group 2 (tracheal intubation), Group 3 (intra-tracheal administration of distilled water) and Group 4, at 8 weeks of age. Outer diameter and tracheal ring length in Group 4 were also compared with that in Group 1 at 12 and 16 weeks of age. RESULTS At 8 weeks of age, tracheal ring length with b-FGF administration for more than 4 days in Group 4 was significantly increased over that following 1-day administration. At 8 weeks of age, mean outer diameter and the mean tracheal ring length in Group 4 were significantly greater than in the other groups. Mean outer diameter and mean tracheal ring length were significantly greater in Group 4 than in Group 1 at 12 and 16 weeks of age. CONCLUSION This study has shown that intra-tracheal administration of b-FGF enlarges the tracheal lumen.
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Affiliation(s)
- Makoto Komura
- Department of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan. .,Department of Pediatric Surgery, Saitama Medical University, Morohongou 38, Moroyama-chou, Iruma-gun, Saitama, 350-0495, Japan. .,Department of Tissue Engineering, Tokyo University Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Hiroko Komura
- Department of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Tetsuya Ishimaru
- Department of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kenichiro Konishi
- Department of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hiroaki Komuro
- Department of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kazuto Hoshi
- Department of Tissue Engineering, Tokyo University Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Tsuyoshi Takato
- Department of Tissue Engineering, Tokyo University Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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Long-term follow-up of tracheal cartilage growth promotion by intratracheal injection of basic fibroblast growth factor. J Pediatr Surg 2018; 53:2394-2398. [PMID: 30244942 DOI: 10.1016/j.jpedsurg.2018.08.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 08/25/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND Intratracheal injection of basic fibroblast growth factor (b-FGF) has been shown to enlarge the tracheal lumen 4 weeks after treatment. The objective of this study was to investigate the long-term effect of tracheal cartilage growth promotion by intratracheal injection of b-FGF. MATERIALS AND METHODS New Zealand white rabbits were classified into four groups to receive either distilled water alone (Group 1; n = 16; control), 40 μg (Group 2; n = 10), 100 μg (Group 3; n = 13), or 200 μg (Group 4; n = 16) of b-FGF dissolved in water. The treatment was injected into the posterior wall of the cervical trachea using a tracheoscope. The animals were sacrificed 4 or 12 weeks later. RESULTS Four weeks after treatment, the mean luminal areas of tracheas for Groups 1, 2, 3, and 4 were 27.2, 25.6, 32.2, and 36.2 mm2, respectively. At 12 weeks, these were 29.3, 37.9, 42.5, and 56.0 mm2, respectively. The levels of glycosaminoglycan at 12 weeks were 93.9, 152.5, 123.2, and 210.6 μg/mg, respectively. At 12 weeks, the levels of type II collagen were 77.2, 133.1, 99.2, and 148.9 μg/mg, respectively. CONCLUSION Twelve weeks after a single injection of b-FGF, the mean luminal area of the trachea continued to increase.
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Tracheal cartilage growth by intratracheal injection of basic fibroblast growth factor. J Pediatr Surg 2017; 52:235-238. [PMID: 27887682 DOI: 10.1016/j.jpedsurg.2016.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 11/08/2016] [Indexed: 11/22/2022]
Abstract
BACKGROUND/PURPOSE We have previously shown that intratracheal injection of slowly released (in gelatin) basic fibroblast growth factor (bFGF) significantly enlarged the tracheal lumen by a slight margin. This study aimed to investigate differences in tracheal cartilage growth by the intratracheal injection of bFGF doses in a rabbit model. METHODS Water (group 1; n=7; control) or 100μg (group 2; n=8) or 200μg (group 3; n=8) of bFGF dissolved in water was injected into the posterior wall of the cervical trachea of New Zealand white rabbits using a tracheoscope. All animals were sacrificed four weeks later. RESULTS The mean circumferences of cervical tracheas for groups 1, 2, and 3 were 18.8±0.83, 21.1±2.0, and 22.1±1.3mm, respectively. A significant difference was found between groups 1 and 2 (P=0.034) and groups 1 and 3 (P=0.004). The mean luminal areas of cervical tracheas for groups 1, 2, and 3 were 27.0±2.1, 32.2±4.8, and 36.3±4.6mm2, respectively. A significant difference was found between groups 1 and 3 (P=0.001). CONCLUSION Intratracheal injection of bFGF in the dose range used significantly promoted the growth of tracheal cartilage in a rabbit model. LEVELS OF EVIDENCE Level II at treatment study (animal experiment).
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Slow release of basic fibroblast growth factor (b-FGF) enhances mechanical properties of rat trachea. J Pediatr Surg 2015; 50:255-9. [PMID: 25638613 DOI: 10.1016/j.jpedsurg.2014.11.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 11/02/2014] [Indexed: 11/22/2022]
Abstract
AIM Severe tracheomalacia is a life-threatening disease, but symptoms usually improve with growth. The aims of this study were to investigate how slow release basic-Fibroblast Growth Factor (b-FGF) acts on tracheal cartilage, and whether growth-promoted trachea is more resistant against an increase in externally-applied pressure. METHODS Biodegradable gelatin hydrogel sheets soaked in 10 μl of distilled water (sham) or 0.5 or 5 μg/10 μl of b-FGF solution were inserted behind the cervical trachea of three-week-old male Wistar rats. The cervical trachea was harvested 4 weeks later. Extratracheal pressure was increased from 0 to 40 cmH2O in a chamber, while video-recording the internal lumen. The luminal area at each pressure was expressed as a proportion to that at 0 cmH2O. The amounts of collagen type II and glycosaminoglycan were measured by ELISA. RESULTS The luminal areas at 40 cmH2O in the control (no intervention), sham, and each of the b-FGF groups were 0.65, 0.62, 0.72, and 0.73, respectively. The amounts of collagen type II and glycosaminoglycan in each group were 127, 136, 193, 249 μg/mg, respectively, and 15, 16, 19, 33 μg/mg, respectively. There were significant differences between the control group and the FGF 5 group (P=0.02, 0.01, 0.01, for luminal area, collagen, and glycosaminoglycan, respectively). CONCLUSION 5 μg of slow-release b-FGF promotes matrix production (collagen type II and glycosaminoglycan). The growth-enhanced trachea was more resistant to collapse, suggesting that slowly released b-FGF might be useful in patients with severe tracheomalacia.
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Battig MR, Huang Y, Chen N, Wang Y. Aptamer-functionalized superporous hydrogels for sequestration and release of growth factors regulated via molecular recognition. Biomaterials 2014; 35:8040-8. [PMID: 24954732 DOI: 10.1016/j.biomaterials.2014.06.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Accepted: 06/01/2014] [Indexed: 10/25/2022]
Abstract
While the discovery of highly potent biologics has led to the development of promising therapies for various human diseases, biologics can cause severe toxicity if delivered inappropriately. Thus, great efforts have been made to synthesize polymeric systems for safe and efficient delivery of biologics. However, the application of polymeric delivery systems is often limited by problems such as harsh reaction conditions, low drug sequestration efficiency, and difficult drug release regulation. This study was aimed at developing a superporous material system with a hydrogel and an aptamer to overcome these challenges. The results have shown that the superporous hydrogel is capable of instantaneously and fully sequestering a large amount of growth factors, owing to the presence of superporous architectures and aptamers. Moreover, the sequestering and loading procedure does not involve any harsh conditions. The release kinetics of growth factors can be molecularly modulated by either changing the binding affinity of the aptamer or by using a triggering effector. Therefore, this study presents a promising superporous material for the delivery of highly potent biologics such as growth factors for clinical applications.
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Affiliation(s)
- Mark R Battig
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802-6804, USA
| | - Yike Huang
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802-6804, USA
| | - Niancao Chen
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802-6804, USA
| | - Yong Wang
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802-6804, USA.
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Komura M, Komura H, Konishi K, Ishimaru T, Hoshi K, Takato T, Tabata Y, Iwanaka T. Promotion of tracheal cartilage growth by intra-tracheal injection of basic fibroblast growth factor (b-FGF). J Pediatr Surg 2014; 49:296-300. [PMID: 24528971 DOI: 10.1016/j.jpedsurg.2013.11.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 11/10/2013] [Indexed: 01/03/2023]
Abstract
PURPOSE Basic fibroblast growth factor (b-FGF) is a very effective growth factor that induces the proliferation of chondrocytes. This study aimed to investigate whether intra-tracheally-injected b-FGF solution promotes the growth of tracheal cartilage. METHODS Group 1: 500 μl of distilled water was injected at the posterior wall of the cervical trachea of New Zealand white rabbits by using a tracheoscope (n=5). Group 2: 100 μg/500 μl of b-FGF solution was injected at the posterior wall of the cervical trachea (n=5). Group 3: Biodegradable gelatin hydrogel microspheres incorporating 100 μg/500 μl of b-FGF solution were injected at the posterior wall of the cervical trachea (n=5). All animals were sacrificed 4 weeks later, and the outer diameter and luminal area of the cervical trachea at the site of b-FGF injection were measured. RESULTS The cervical tracheas in the two b-FGF injection groups were spindle-shaped and had a maximum diameter at the injection site. The median outer diameter of the cervical trachea in Groups 1, 2, and 3 was 7.3, 8.0, and 8.0mm, respectively, showing a significant difference among Groups 1, 2, and 3 (P=0.04). The median luminal area in Groups 1, 2, and 3 was 27.4, 29.4, and 32.1mm(2), respectively. The ad hoc test showed a marginally significant difference only between groups 1 and 3 (p=0.056). CONCLUSION Intra-tracheal injection of slowly released b-FGF enlarged the tracheal lumen.
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Affiliation(s)
- Makoto Komura
- Dept. of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655; Dept. of Pediatric Surgery, Graduate School of Medicine, Saitama Medical University, 38 Morohongo, Moroyamacho, Irumagun, Saitama prefecture 350-0495.
| | - Hiroko Komura
- Dept. of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655
| | - Kenichirou Konishi
- Dept. of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655
| | - Tetsuya Ishimaru
- Dept. of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655
| | - Kazuto Hoshi
- Dept. of Tissue Engineering, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655
| | - Tsuyoshi Takato
- Dept. of Tissue Engineering, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655
| | - Yasuhiko Tabata
- Dept. of Biomaterials, Field of Tissue Engineering, Institute of Frontier Medical Science, Kyoto University, 53 Shogoin Kawara cho, Sakyo-ku, Kyoto prefecture, 606-8507
| | - Tadashi Iwanaka
- Dept. of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655
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