1
|
Meissner S, Rees S, Nguyen L, Connor B, Barker D, Harland B, Raos B, Svirskis D. Encapsulation of the growth factor neurotrophin-3 in heparinised poloxamer hydrogel stabilises bioactivity and provides sustained release. Biomater Adv 2024; 159:213837. [PMID: 38522310 DOI: 10.1016/j.bioadv.2024.213837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/03/2024] [Accepted: 03/19/2024] [Indexed: 03/26/2024]
Abstract
Poloxamer-based hydrogels show promise to stabilise and sustain the delivery of growth factors in tissue engineering applications, such as following spinal cord injury. Typically, growth factors such as neurotrophin-3 (NT-3) degrade rapidly in solution. Similarly, poloxamer hydrogels also degrade readily and are, therefore, only capable of sustaining the release of a payload over a small number of days. In this study, we focused on optimising a hydrogel formulation, incorporating both poloxamer 188 and 407, for the sustained delivery of bioactive NT-3. Hyaluronic acid blended into the hydrogels significantly reduced the degradation of the gel. We identified an optimal hydrogel composition consisting of 20 % w/w poloxamer 407, 5 % w/w poloxamer 188, 0.6 % w/w NaCl, and 1.5 % w/w hyaluronic acid. Heparin was chemically bound to the poloxamer chains to enhance interactions between the hydrogel and the growth factor. The unmodified and heparin-modified hydrogels exhibited sustained release of NT-3 for 28 days while preserving the bioactivity of NT-3. Moreover, these hydrogels demonstrated excellent cytocompatibility and had properties suitable for injection into the intrathecal space, underscoring their suitability as a growth factor delivery system. The findings presented here contribute valuable insights to the development of effective delivery strategies for therapeutic growth factors for tissue engineering approaches, including the treatment of spinal cord injury.
Collapse
Affiliation(s)
- Svenja Meissner
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Shaun Rees
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Linh Nguyen
- Department of Pharmacology & Clinical Pharmacology, Centre of Brain Research, School of Medical Science, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Bronwen Connor
- Department of Pharmacology & Clinical Pharmacology, Centre of Brain Research, School of Medical Science, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - David Barker
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Bruce Harland
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Brad Raos
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Darren Svirskis
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand.
| |
Collapse
|
2
|
Morlock GE, Busso M, Tomeba S, Sighicelli A. Effect-directed profiling of 32 vanilla products, characterization of multi-potent compounds and quantification of vanillin and ethylvanillin. J Chromatogr A 2021; 1652:462377. [PMID: 34271255 DOI: 10.1016/j.chroma.2021.462377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/24/2021] [Accepted: 06/26/2021] [Indexed: 01/18/2023]
Abstract
Food testing is of great importance to the food industry and organizations to verify the authenticity claims, to prove the quality of raw materials and products, and to ensure food safety. The market prices of vanilla differed by a factor of about 20 in the last three decades. Therefore the risk of adulteration and counterfeiting of vanilla products is high. Instead of commonly used target analyses and sum parameter assays, a complementary non-target multi-imaging effect-directed screening was developed, which provided a new perspective on the wide range of vanilla product qualities on the market. Planar chromatography was combined with effect-directed assays, and the obtained biological and biochemical profiles of 32 vanilla products from nine different categories revealed a variety of active ingredients. Depending on the region, typical vanilla product profiles and activity patterns were obtained for pods, tinctures, paste (inner part), oleoresin and powders. However, some vanilla products showed additional active compounds and a different intensity pattern. The vanilla product profiles substantially differed from those of vanilla aroma or products containing synthetic vanillin or vanilla-flavored food products. Bioactive compounds of interest were online eluted and further characterized via HPTLC-HRMS, which allowed their tentative assignment. After purchase of the standards, these were successfully confirmed by co-chromatography. Quantification of vanillin across nine different product categories revealed levels ranging from 1 µg/g to 36 mg/g with a mean repeatability of 1.9%. The synthetic ethylvanillin was not detected in the investigated samples in significant concentrations. The assessment of differences in the activity patterns pointed to highly active compounds, which were not detected at UV/Vis/FLD but first via the biological and enzymatic assays. This effect-directed profiling bridges the gap from analytical food chemistry to food toxicology, and thus, makes an important contribution to consumer safety. In the same way, it would accelerate investigations for Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) according to Regulation (EC) No. 1907/2006.
Collapse
Affiliation(s)
- G E Morlock
- Institute of Nutritional Science, Chair of Food Science, and TransMIT Center for Effect-Directed Analysis, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany.
| | - M Busso
- Institute of Nutritional Science, Chair of Food Science, and TransMIT Center for Effect-Directed Analysis, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany; On leave from Università degli Studi di Milano, Facoltà di Scienze Agrarie e Alimentari, Via Giovanni Celoria 2, 20133 Milano, Italy
| | - S Tomeba
- Institute of Nutritional Science, Chair of Food Science, and TransMIT Center for Effect-Directed Analysis, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany; On leave from Università degli Studi di Modena e Reggio Emilia, Facoltà di Farmacia, Via Giuseppe Campi 203, 41125 Modena, Italy
| | - A Sighicelli
- Institute of Nutritional Science, Chair of Food Science, and TransMIT Center for Effect-Directed Analysis, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany; On leave from Università degli Studi di Modena e Reggio Emilia, Facoltà di Farmacia, Via Giuseppe Campi 203, 41125 Modena, Italy
| |
Collapse
|
3
|
Li H, Bu X, Li K, Wu D. Production of a novel Poria cocos immunomodulatory protein in Pichia pastoris: cloning, expression, purification and activities assays. World J Microbiol Biotechnol 2019; 35:27. [PMID: 30680515 DOI: 10.1007/s11274-019-2602-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 01/18/2019] [Indexed: 11/29/2022]
Abstract
In this study, the cDNA of immunomodulatory protein from Poria cocos (PCP) was amplified by reverse transcription polymerase chain reaction and used to transform P. Pastoris cells, resulting in rPCP expression as a secreted protein to a concentration of ~ 38 mg/L following methanol induction in shake flasks. Approximately 1.6 mg of high purity rPCP was obtained from a 100-mL culture by Ni+-affinity chromatography, and sodium dodecyl sulfate polyacrylamide gel electrophoresis results indicated rPCP as a homologous dimer glycoprotein formed by different molecular-weight monomers. Peptide-N-glycosidase F-mediated deglycosylation analysis showed the presence of an N-glycosylated rPCP monomer, and bioactivity assays showed that rPCP activity upregulated tumor necrosis factor (TNF)-α and interleukin-1β transcription and increased TNF-α secretion from mouse macrophage RAW 264.7 cells. Shortly, we demonstrated successful purification of active rPCP from P. pastoris, which promoted further study of its biological activities and medical applications.
Collapse
Affiliation(s)
- Hongbo Li
- Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, College of Biological and Food Engineering, Huaihua University, Huaihua, 418008, China.
| | - Xiufen Bu
- Department of Genetics and Eugenics, Changsha Hospital for Maternal and Child Health Care, Changsha, 410000, China
| | - Kuai Li
- The Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, 510530, China
| | - Donghai Wu
- The Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, 510530, China.
| |
Collapse
|
4
|
Yang R, Xiao CF, Guo YF, Ye M, Lin J. Inclusion complexes of GA 3 and the plant growth regulation activities. Mater Sci Eng C Mater Biol Appl 2018; 91:475-485. [PMID: 30033279 DOI: 10.1016/j.msec.2018.05.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 04/22/2018] [Accepted: 05/13/2018] [Indexed: 10/16/2022]
Abstract
Gibberellic acid (GA3) is an important phytohormone that is applied in agriculture, nurseries, tissue culture, tea gardens, etc. However, it has some drawbacks such as potential hazardous effects on mammals and labile in the condition of a weak base or acid. In this study, the enhanced stability and bioavailability of GA3 were achieved by forming the inclusion complexes of GA3 with cyclodextrins (β- or γ-CD) and its derivative (HP-β-CD). In the preliminary plant growth regulation assay, GA3/CDs displays superior bioactivity compared to pure GA3 to help with the early seedling growth of cucumber and mung bean and the root growth of cucumber and mung bean, respectively. The results showed that there was a certain relationship between the inclusion ability, stability and bioactivity. The inclusion stability constants of gibberellin clathrate are consistent with the order of stabilities of the inclusion complex. Among these complexes, GA3/HP-β-CD possess highest inclusion constant, and the binding ability of the HP-β-CD not only enhances the stability of gibberellic acid in the stability test but also plays a slow release role in the bioactivity assay. Therefore, the complex of GA3 may be used as a promising plant growth regulator.
Collapse
Affiliation(s)
- Rui Yang
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, PR China; Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China.
| | - Chuan-Fan Xiao
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China
| | - Ya-Fei Guo
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Min Ye
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, PR China.
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China.
| |
Collapse
|
5
|
Liu K, Yang YB, Chen JL, Miao CP, Wang Q, Zhou H, Chen YW, Li YQ, Ding ZT, Zhao LX. Koninginins N-Q, Polyketides from the Endophytic Fungus Trichoderma koningiopsis Harbored in Panax notoginseng. Nat Prod Bioprospect 2016; 6:49-55. [PMID: 26753920 PMCID: PMC4749524 DOI: 10.1007/s13659-015-0085-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 12/20/2015] [Indexed: 06/05/2023]
Abstract
Four new fungal polyketides named koninginins N-Q (1-4), together with four known analogues (5-8), were isolated from the endophytic fungus Trichoderma koningiopsis YIM PH30002 harbored in Panax notoginseng. Their structures were determined on the basis of spectral data interpretation. These compounds were evaluated for their antifungal activity, nitric oxide inhibition, and anticoagulant activity.
Collapse
Affiliation(s)
- Kai Liu
- Yunnan Institute of Microbiology, School of Life Science, Yunnan University, Kunming, 650091, People's Republic of China
| | - Ya-Bin Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, People's Republic of China
| | - Jin-Lian Chen
- School of Energy and Environment Science, Yunnan Normal University, Kunming, 650092, People's Republic of China
| | - Cui-Ping Miao
- Yunnan Institute of Microbiology, School of Life Science, Yunnan University, Kunming, 650091, People's Republic of China
| | - Qiang Wang
- Yunnan Institute of Microbiology, School of Life Science, Yunnan University, Kunming, 650091, People's Republic of China
| | - Hao Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, People's Republic of China
| | - You-Wei Chen
- Yunnan Institute of Microbiology, School of Life Science, Yunnan University, Kunming, 650091, People's Republic of China
| | - Yi-Qing Li
- Yunnan Institute of Microbiology, School of Life Science, Yunnan University, Kunming, 650091, People's Republic of China
| | - Zhong-Tao Ding
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, People's Republic of China.
| | - Li-Xing Zhao
- Yunnan Institute of Microbiology, School of Life Science, Yunnan University, Kunming, 650091, People's Republic of China.
| |
Collapse
|
6
|
Abstract
Recent studies have shown that low concentrations of brassinolide induce a rapid generation of nitric oxide in mesophyll cells of maize leaves, which can be easily detected by fluorimetric methods. In this work we describe a series of natural and synthetic brassinosteroids that are able to trigger in vitro NO production in tomato cells that exhibits dose-response behavior. We propose that this effect can be used to develop a new rapid and very sensitive bioassay for brassinosteroid activity that offers several advantages when compared to the current methodologies.
Collapse
Affiliation(s)
- Vanesa E Tossi
- Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC1245 (7600) Mar del Plata, Argentina
| | - Sofía L Acebedo
- UMYMFOR - Departamento de Química Orgánica y CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Ciudad de Buenos Aires C1428EGA, Argentina
| | - Raúl O Cassia
- Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC1245 (7600) Mar del Plata, Argentina
| | - Lorenzo Lamattina
- Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC1245 (7600) Mar del Plata, Argentina
| | - Lydia R Galagovsky
- UMYMFOR - Departamento de Química Orgánica y CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Ciudad de Buenos Aires C1428EGA, Argentina
| | - Javier A Ramírez
- UMYMFOR - Departamento de Química Orgánica y CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Ciudad de Buenos Aires C1428EGA, Argentina.
| |
Collapse
|