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Zhu S, Liu X, Lu X, Liao Q, Luo H, Tian Y, Cheng X, Jiang Y, Liu G, Chen J. Biomaterials and tissue engineering in traumatic brain injury: novel perspectives on promoting neural regeneration. Neural Regen Res 2024; 19:2157-2174. [PMID: 38488550 PMCID: PMC11034597 DOI: 10.4103/1673-5374.391179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/13/2023] [Accepted: 11/20/2023] [Indexed: 04/24/2024] Open
Abstract
Traumatic brain injury is a serious medical condition that can be attributed to falls, motor vehicle accidents, sports injuries and acts of violence, causing a series of neural injuries and neuropsychiatric symptoms. However, limited accessibility to the injury sites, complicated histological and anatomical structure, intricate cellular and extracellular milieu, lack of regenerative capacity in the native cells, vast variety of damage routes, and the insufficient time available for treatment have restricted the widespread application of several therapeutic methods in cases of central nervous system injury. Tissue engineering and regenerative medicine have emerged as innovative approaches in the field of nerve regeneration. By combining biomaterials, stem cells, and growth factors, these approaches have provided a platform for developing effective treatments for neural injuries, which can offer the potential to restore neural function, improve patient outcomes, and reduce the need for drugs and invasive surgical procedures. Biomaterials have shown advantages in promoting neural development, inhibiting glial scar formation, and providing a suitable biomimetic neural microenvironment, which makes their application promising in the field of neural regeneration. For instance, bioactive scaffolds loaded with stem cells can provide a biocompatible and biodegradable milieu. Furthermore, stem cells-derived exosomes combine the advantages of stem cells, avoid the risk of immune rejection, cooperate with biomaterials to enhance their biological functions, and exert stable functions, thereby inducing angiogenesis and neural regeneration in patients with traumatic brain injury and promoting the recovery of brain function. Unfortunately, biomaterials have shown positive effects in the laboratory, but when similar materials are used in clinical studies of human central nervous system regeneration, their efficacy is unsatisfactory. Here, we review the characteristics and properties of various bioactive materials, followed by the introduction of applications based on biochemistry and cell molecules, and discuss the emerging role of biomaterials in promoting neural regeneration. Further, we summarize the adaptive biomaterials infused with exosomes produced from stem cells and stem cells themselves for the treatment of traumatic brain injury. Finally, we present the main limitations of biomaterials for the treatment of traumatic brain injury and offer insights into their future potential.
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Affiliation(s)
- Shihong Zhu
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Xiaoyin Liu
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan Province, China
| | - Xiyue Lu
- Department of Anesthesiology, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Qiang Liao
- Department of Pharmacy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Huiyang Luo
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
- Department of Anesthesiology, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Yuan Tian
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Xu Cheng
- Department of Anesthesiology, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Yaxin Jiang
- Out-patient Department, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Guangdi Liu
- Department of Respiratory and Critical Care Medicine, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
| | - Jing Chen
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
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Shekhar H, Behera P, Naik A, Mishra M, Sahoo H. Interaction between polydopamine-based IONPs and human serum albumin (HSA): a spectroscopic analysis with cytotoxicity impact. Nanotoxicology 2024; 18:479-498. [PMID: 39177468 DOI: 10.1080/17435390.2024.2392579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 07/31/2024] [Accepted: 08/01/2024] [Indexed: 08/24/2024]
Abstract
Iron oxide nanoparticles (IONPs) have been extensively explored in biomedicine, bio-sensing, hyperthermia, and drug/gene delivery, attributed to their versatile and tunable properties. However, owing to its numerous applications, the functionalization of IONPs with appropriate materials is in demand. To achieve optimal functionalization of IONPs, polydopamine (PDA) was utilized due to its ability to provide a superior functionalized surface, near-infrared light absorption, and adhesive nature to customize desired functionalized IONPs. This notion of involving PDA led to the successful synthesis of magnetite-PDA nanoparticles, where PDA is surface-coated on magnetite (Fe3O4@PDA). The Fe3O4@PDA nanoparticles were characterized using techniques like TEM, FESEM, PXRD, XPS, VSM, and FTIR, suggesting PDA's successful attachment with magnetite crystal structure retention. Human serum albumin (HSA), the predominant protein in blood plasma, interacts with the delivered nanoparticles. Therefore, we have employed various spectroscopic techniques, along with cytotoxicity, to inspect the effect of Fe3O4@PDA NPs on the stability and structure of HSA. The structural alterations were examined using circular dichroism (CD) and synchronous fluorescence spectroscopy (SFS). It has been observed that there are no structural perturbations in the secondary structure of the HSA protein after interaction with Fe3O4@PDA. Studies using steady-state fluorescence revealed that the inherent fluorescence intensities of HSA were suppressed after interaction with Fe3O4@PDA. In addition, temperature-dependent fluorescence measurements suggested that the type of quenching consists of both static and dynamic quenching simultaneously. A cytotoxicity study in Drosophila melanogaster larvae revealed no cytotoxic effects but did show a minor genotoxic effect only at higher concentrations.
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Affiliation(s)
- Himanshu Shekhar
- Biophysical and Protein Chemistry Lab, Department of Chemistry, National Institute of Technology, Rourkela, India
| | - Priyatama Behera
- Neural Developmental Biology Lab, Department of Life Science, National Institute of Technology, Rourkela, India
| | - Ashutosh Naik
- Biophysical and Protein Chemistry Lab, Department of Chemistry, National Institute of Technology, Rourkela, India
| | - Monalisa Mishra
- Neural Developmental Biology Lab, Department of Life Science, National Institute of Technology, Rourkela, India
| | - Harekrushna Sahoo
- Biophysical and Protein Chemistry Lab, Department of Chemistry, National Institute of Technology, Rourkela, India
- Center for Nanomaterials, National Institute of Technology, Rourkela, India
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Chen Q, Tao W, Wang J, Li J, Zheng M, Liu Y, Lu S, Fang Z. Inhibitive Mechanism of Loquat Flower Isolate on Tyrosinase Activity and Melanin Synthesis in Mouse Melanoma B16 Cells. Biomolecules 2024; 14:895. [PMID: 39199283 PMCID: PMC11352878 DOI: 10.3390/biom14080895] [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: 06/16/2024] [Revised: 07/09/2024] [Accepted: 07/11/2024] [Indexed: 09/01/2024] Open
Abstract
Melanin naturally exists in organisms and is synthetized by tyrosinase (TYR); however, its over-production may lead to aberrant pigmentation and skin conditions. Loquat (Eriobotrya japonica (Thunb.) Lindl.) flowers contain a variety of bioactive compounds, while studies on their suppressive capabilities against melanin synthesis are limited. Loquat flower isolate product (LFP) was obtained by ethanol extraction and resin purification, and its inhibitory efficiency against TYR activity was investigated by enzyme kinetics and multiple spectroscopy analyses. In addition, the impact of LFP on melanin synthesis-related proteins' expression in mouse melanoma B16 cells was analyzed using Western blotting. HPLC-MS/MS analysis indicated that LFP was composed of 137 compounds, of which 12 compounds, including flavonoids (quercetin, isorhamnoin, p-coumaric acid, etc.) and cinnamic acid and its derivatives, as well as benzene and its derivatives, might have TYR inhibitory activities. LFP inhibited TYR activity in a concentration-dependent manner with its IC50 value being 2.8 mg/mL. The inhibition was an anti-competitive one through altering the enzyme's conformation rather than chelating copper ions at the active center. LFP reduced the expression of TYR, tyrosinase-related protein (TRP) 1, and TRP2 in melanoma B16 cells, hence inhibiting the synthesis of melanin. The research suggested that LFP had the potential to reduce the risks of hyperpigmentation caused by tyrosinase and provided a foundation for the utilization of loquat flower as a natural resource in the development of beauty and aging-related functional products.
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Affiliation(s)
- Qianqian Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Fruit and Vegetables Postharvest and Processing Technology, Ministry of Agriculture and Rural Affairs Key Laboratory of Post-Harvest Handling of Fruits, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Q.C.); (W.T.); (J.L.); (M.Z.)
- College of Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Wenyang Tao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Fruit and Vegetables Postharvest and Processing Technology, Ministry of Agriculture and Rural Affairs Key Laboratory of Post-Harvest Handling of Fruits, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Q.C.); (W.T.); (J.L.); (M.Z.)
| | - Jianfeng Wang
- Xingzhi College, Zhejiang Normal University, Lanxi 321100, China
| | - Jingrui Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Fruit and Vegetables Postharvest and Processing Technology, Ministry of Agriculture and Rural Affairs Key Laboratory of Post-Harvest Handling of Fruits, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Q.C.); (W.T.); (J.L.); (M.Z.)
| | - Meiyu Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Fruit and Vegetables Postharvest and Processing Technology, Ministry of Agriculture and Rural Affairs Key Laboratory of Post-Harvest Handling of Fruits, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Q.C.); (W.T.); (J.L.); (M.Z.)
| | - Yinying Liu
- School of Agriculture, Food, and Ecosystem Sciences, The University of Melbourne, Parkville, VIC 3010, Australia; (Y.L.); (Z.F.)
| | - Shengmin Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Fruit and Vegetables Postharvest and Processing Technology, Ministry of Agriculture and Rural Affairs Key Laboratory of Post-Harvest Handling of Fruits, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Q.C.); (W.T.); (J.L.); (M.Z.)
- College of Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Zhongxiang Fang
- School of Agriculture, Food, and Ecosystem Sciences, The University of Melbourne, Parkville, VIC 3010, Australia; (Y.L.); (Z.F.)
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Hai-Na Z, Jun-Jie J, Guang-Meng X. Peptides derived from growth factors: Exploring their diverse impact from antimicrobial properties to neuroprotection. Biomed Pharmacother 2024; 176:116830. [PMID: 38824833 DOI: 10.1016/j.biopha.2024.116830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 05/21/2024] [Accepted: 05/26/2024] [Indexed: 06/04/2024] Open
Abstract
Growth factor-derived peptides are bioactive molecules that play a crucial role in various physiological processes within the human body. Over the years, extensive research has revealed their diverse applications, ranging from antimicrobial properties to their potential in neuroprotection and treating various diseases. These peptides exhibit innate immune responses and have been found to possess potent antimicrobial properties against a wide range of pathogens. Growth factor-derived peptides have demonstrated the ability to promote neuronal survival, prevent cell death, and stimulate neural regeneration. As a result, they hold immense promise in the treatment of various neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, and multiple sclerosis, as well as in the management of traumatic brain injuries. Moreover, growth factor-derived peptides have shown potential for supporting tissue repair and wound healing processes. By enhancing cell proliferation and migration, these peptides contribute to the regeneration of damaged tissues and promote a more efficient healing response. The applications of growth factor-derived peptides extend beyond their therapeutic potential in health; they also have a role in various disease conditions. For example, researchers have explored their influence on cancer cells, where some peptides have demonstrated anti-cancer properties, inhibiting tumor growth and promoting apoptosis in cancer cells. Additionally, their immunomodulatory properties have been investigated for potential applications in autoimmune disorders. Despite the immense promise shown by growth factor-derived peptides, some challenges need to be addressed. Nevertheless, ongoing research and advancements in biotechnology offer promising avenues to overcome these obstacles. The review summarizes the foundational biology of growth factors and the intricate signaling pathways in various physiological processes as well as diseases such as cancer, neurodegenerative disorders, cardiovascular ailments, and metabolic syndromes.
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Affiliation(s)
- Zhang Hai-Na
- Department of Rehabilitation, The Second Hospital of Jilin University, Changchun 130000, PR China
| | - Jiang Jun-Jie
- Department of Rehabilitation, The Second Hospital of Jilin University, Changchun 130000, PR China
| | - Xu Guang-Meng
- Department of Colorectal and Anal Surgery, The Second Hospital of Jilin University, Changchun 130000, PR China.
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Halat M, Zając G, Andrushchenko V, Bouř P, Baranski R, Pajor K, Baranska M. Induced Chirality in Canthaxanthin Aggregates Reveals Multiple Levels of Supramolecular Organization. Angew Chem Int Ed Engl 2024; 63:e202402449. [PMID: 38517385 DOI: 10.1002/anie.202402449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/08/2024] [Accepted: 03/21/2024] [Indexed: 03/23/2024]
Abstract
Carotenoids tend to form supramolecular aggregates via non-covalent interactions where the chirality of individual molecules is amplified to the macroscopic level. We show that this can also be achieved for non-chiral carotenoid monomers interacting with polysaccharides. The chirality induction in canthaxanthin (CAX), caused by heparin (HP) and hyaluronic acid (HA), was monitored by chiroptical spectroscopy. Electronic circular dichroism (ECD) and Raman optical activity (ROA) spectra indicated the presence of multiple carotenoid formations, such as H- and J-type aggregates. This is consistent with molecular dynamics (MD) and density functional theory (DFT) simulations of the supramolecular structures and their spectroscopic response.
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Affiliation(s)
- Monika Halat
- Department of Plant Biology and Biotechnology, University of Agriculture in Krakow, Al. Mickiewicza 21, 31-120, Krakow, Poland
| | - Grzegorz Zając
- Jagiellonian Centre for Experimental Therapeutics, Jagiellonian University, Bobrzynskiego 14, 30-348, Krakow, Poland
| | - Valery Andrushchenko
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic
| | - Rafal Baranski
- Department of Plant Biology and Biotechnology, University of Agriculture in Krakow, Al. Mickiewicza 21, 31-120, Krakow, Poland
| | - Katarzyna Pajor
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland
- Doctoral School of Exact and Natural Sciences, Jagiellonian University, S. Łojasiewicza 11, 30-348, Krakow, Poland
| | - Malgorzata Baranska
- Jagiellonian Centre for Experimental Therapeutics, Jagiellonian University, Bobrzynskiego 14, 30-348, Krakow, Poland
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland
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Chu Y, Kordower JH. Post-Mortem Studies of Neurturin Gene Therapy for Parkinson's Disease: Two Subjects with 10 Years CERE120 Delivery. Mov Disord 2023; 38:1728-1736. [PMID: 37544016 DOI: 10.1002/mds.29518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 05/18/2023] [Accepted: 06/06/2023] [Indexed: 08/08/2023] Open
Abstract
BACKGROUND Neurturin is a member of the glial cell line-derived neurotrophic factor family of neurotrophic factors and has the potential to protectdegenerating dopaminergic neurons. OBJECTIVE Here, we performed post-mortem studies on two patients with advanced Parkinson's disease that survived 10 years following AAV-neurturin gene (Cere120) delivery to verify long-term effects of trophic factor neurturin. METHODS Cere120 was delivered to the putamen bilaterally in one case and to the putamen plus substantia nigra bilaterally in the second. Immunohistochemistry was used to examine neurturin, Rearranged during transfection(RET), phosphor-S6, and tyrosine hydroxylase expressions, inflammatory reactions, and α-synuclein accumulation. RESULTS In both patients there was persistent, albeit limited, neurturin expression in the putamen covering 1.31% to 5.92% of the putamen. Dense staining of tyrosine hydroxylase-positive fibers was observed in areas that contained detectable neurturin expression. In substantia nigra, neurturin expression was detected in 11% of remaining melanin-containing neurons in the patient with combined putamenal and nigral gene delivery, but not in the patient with putamenal gene delivery alone. Tyrosine hydroxylase positive neurons were 66% to 84% of remaining neuromelanin neurons in substantia nigra with Cere120 delivery and 23% to 24% in substantia nigra without gene delivery. More RET and phosphor-S6 positive neurons were observed in substantia nigra following nigral Cere120. Inflammatory and Lewy pathologies were similar in substantia nigra with or without Cere120 delivery. CONCLUSIONS This study provides evidence of long-term persistent transgene expression and bioactivity following gene delivery to the nigrostriatal system. Therefore, future efforts using gene therapy for neurodegenerative diseases should consider means to enhance remaining dopamine neuron function and stop pathological propagation. © 2023 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Yaping Chu
- ASU-Banner Neurodegenerative Disease Research Center, Tempe, Arizona, USA
| | - Jeffrey H Kordower
- ASU-Banner Neurodegenerative Disease Research Center, Tempe, Arizona, USA
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
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Sahoo DK, Dasgupta S, Kistwal T, Datta A. Fluorescence monitoring of binding of a Zn (II) complex of a Schiff base with human serum albumin. Int J Biol Macromol 2023; 226:1515-1522. [PMID: 36442551 DOI: 10.1016/j.ijbiomac.2022.11.263] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/19/2022] [Accepted: 11/24/2022] [Indexed: 11/27/2022]
Abstract
Zn (II) complexes of Schiff bases have potential applications in biomedical sciences as imaging agents, cancer therapeutics and diagnostics. Thus, it is important to understand their interaction with carrier proteins, like serum albumins. The present paper focuses on the binding interactions between Human serum albumin (HSA) and Znsalampy, making use of fluorescence spectroscopic techniques at ensemble as well as at single molecular level. An idea about the binding constant is obtained from the quenching of the single Trp (Tryptophan) residue of HSA by Znsalampy. Fluorescence correlation spectroscopy (FCS) has also been used to monitor the protein-ligand binding. The location of Znsalampy in its complex with HSA is determined by competitive binding experiments and molecular docking calculations. The binding constant obtained from the Znsalampy-HSA interaction falls in the ideal range for biological applications and the location is found to be in the proximity of Sudlow's site I. The esterase activity of HSA is retained in the presence of the Znsalampy. Hence, it is concluded that this Znsalampy may be a potential probe and biomarker in biomedical applications.
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Affiliation(s)
- Dipak Kumar Sahoo
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Souradip Dasgupta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Tanuja Kistwal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
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Guvench O. Atomic-Resolution Experimental Structural Biology and Molecular Dynamics Simulations of Hyaluronan and Its Complexes. Molecules 2022; 27:7276. [PMID: 36364098 PMCID: PMC9658939 DOI: 10.3390/molecules27217276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 11/28/2023] Open
Abstract
This review summarizes the atomic-resolution structural biology of hyaluronan and its complexes available in the Protein Data Bank, as well as published studies of atomic-resolution explicit-solvent molecular dynamics simulations on these and other hyaluronan and hyaluronan-containing systems. Advances in accurate molecular mechanics force fields, simulation methods and software, and computer hardware have supported a recent flourish in such simulations, such that the simulation publications now outnumber the structural biology publications by an order of magnitude. In addition to supplementing the experimental structural biology with computed dynamic and thermodynamic information, the molecular dynamics studies provide a wealth of atomic-resolution information on hyaluronan-containing systems for which there is no atomic-resolution structural biology either available or possible. Examples of these summarized in this review include hyaluronan pairing with other hyaluronan molecules and glycosaminoglycans, with ions, with proteins and peptides, with lipids, and with drugs and drug-like molecules. Despite limitations imposed by present-day computing resources on system size and simulation timescale, atomic-resolution explicit-solvent molecular dynamics simulations have been able to contribute significant insight into hyaluronan's flexibility and capacity for intra- and intermolecular non-covalent interactions.
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Affiliation(s)
- Olgun Guvench
- Department of Pharmaceutical Sciences and Administration, School of Pharmacy, Westbrook College of Health Professions, University of New England, 716 Stevens Avenue, Portland, ME 04103, USA
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Cloning and Expression of Heparinase Gene from a Novel Strain Raoultella NX-TZ-3-15. Appl Biochem Biotechnol 2022; 194:4971-4984. [PMID: 35679015 DOI: 10.1007/s12010-022-03917-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2022] [Indexed: 11/02/2022]
Abstract
Heparin is a class of highly sulfated, acidic, linear, and complex polysaccharide that belongs to the heparin/heparan sulfate (HS) glycosaminoglycans family. Enzymatic depolymerization of heparin by heparinases is a promising strategy for the production of ultra-low molecular weight heparins (ULMWHs) as anticoagulants. In the present study, a novel heparinase-producing strain Raoultella NX-TZ-3-15 was isolated and identified from soil samples. Herein, the heparinase gene MBP-H1 was cloned to the pBENT vector to enable expression in Escherichia coli. The optimized conditions made the activity of recombinant heparinase reach the highest level (2140 U/L). The overexpressed MBP-H1 was purified by affinity chromatography and a purity of more than 90% was obtained. The condition for biocatalysis was also optimized and three metal ions Ca2+, Co2+, and Mg2+ were utilized to activate the reaction. In addition, the kinetics regarding the new fusion heparinase was also determined with a Vm value of 11.29 μmol/min and a Km value of 31.2 μmol/L. In short, due to excellent Km and Vmax, the recombinant enzyme has great potential to be used in the clinic in medicine and industrial production of low or ultra-low molecule weight heparin.
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