1
|
Abbadessa A, Nuñez Bernal P, Buttitta G, Ronca A, D'Amora U, Zihlmann C, Stiefel N, Ambrosio L, Malda J, Levato R, Crecente-Campo J, Alonso MJ. Biofunctionalization of 3D printed collagen with bevacizumab-loaded microparticles targeting pathological angiogenesis. J Control Release 2023; 360:747-758. [PMID: 37451546 DOI: 10.1016/j.jconrel.2023.07.017] [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: 02/17/2023] [Revised: 06/05/2023] [Accepted: 07/08/2023] [Indexed: 07/18/2023]
Abstract
Pathological angiogenesis is a crucial attribute of several chronic diseases such as cancer, age-related macular degeneration, and osteoarthritis (OA). In the case of OA, pathological angiogenesis mediated by the vascular endothelial growth factor (VEGF), among other factors, contributes to cartilage degeneration and to implants rejection. In line with this, the use of the anti-VEGF bevacizumab (BVZ) has been shown to prevent OA progression and support cartilage regeneration. The aim of this work was to functionalize a medical grade collagen with poly (lactic-co-glycolic acid) (PLGA) microparticles containing BVZ via three-dimensional (3D) printing to target pathological angiogenesis. First, the effect of several formulation parameters on the encapsulation and release of BVZ from PLGA microparticles was studied. Then, the anti-angiogenic activity of released BVZ was tested in a 3D cell model. The 3D printability of the microparticle-loaded collagen ink was tested by evaluating the shape fidelity of 3D printed structures. Results showed that the release and the encapsulation efficiency of BVZ could be tuned as a function of several formulation parameters. In addition, the released BVZ was observed to reduce vascularization by human umbilical vein endothelial cells. Finally, the collagen ink with embedded BVZ microparticles was successfully printed, leading to shape-stable meniscus-, nose- and auricle-like structures. Taken altogether, we defined the conditions for the successful combination of BVZ-loaded microparticles with the 3D printing of a medical grade collagen to target pathological angiogenesis.
Collapse
Affiliation(s)
- Anna Abbadessa
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), IDIS Research Institute, Universidade de Santiago de Compostela, Santiago de Compostela, Spain; Department of Pharmacology, Pharmacy and Pharmaceutical Technology, School of Pharmacy, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
| | - Paulina Nuñez Bernal
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, the Netherlands.
| | - Giorgio Buttitta
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), IDIS Research Institute, Universidade de Santiago de Compostela, Santiago de Compostela, Spain; Department of Pharmacology, Pharmacy and Pharmaceutical Technology, School of Pharmacy, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
| | - Alfredo Ronca
- Institute of Polymers, Composites and Biomaterials, National Research Council (IPCB-CNR), Naples, Italy.
| | - Ugo D'Amora
- Institute of Polymers, Composites and Biomaterials, National Research Council (IPCB-CNR), Naples, Italy.
| | | | | | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials, National Research Council (IPCB-CNR), Naples, Italy.
| | - Jos Malda
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, the Netherlands; Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
| | - Riccardo Levato
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, the Netherlands; Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
| | - José Crecente-Campo
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), IDIS Research Institute, Universidade de Santiago de Compostela, Santiago de Compostela, Spain; Department of Pharmacology, Pharmacy and Pharmaceutical Technology, School of Pharmacy, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
| | - María José Alonso
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), IDIS Research Institute, Universidade de Santiago de Compostela, Santiago de Compostela, Spain; Department of Pharmacology, Pharmacy and Pharmaceutical Technology, School of Pharmacy, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
| |
Collapse
|
2
|
Costa RODA, Passos TS, Silva EMDS, dos Santos NCS, Morais AHDA. Encapsulated Peptides and Proteins with an Effect on Satiety. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1166. [PMID: 37049259 PMCID: PMC10097199 DOI: 10.3390/nano13071166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/18/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
The world scenario has undergone a nutritional transition in which some countries have left the reality of malnutrition and now face an epidemic of excess body weight. Researchers have been looking for strategies to reverse this situation. Peptides and proteins stand out as promising molecules with anti-obesity action. However, oral administration and passage through the gastrointestinal tract face numerous physiological barriers that impair their bioactive function. Encapsulation aims to protect the active substance and modify the action, one possibility of potentiating anti-obesity activity. Research with encapsulated peptides and proteins has demonstrated improved stability, delivery, controlled release, and increased bioactivity. However, it is necessary to explore how proteins and peptides affect weight loss and satiety, can impact the nutritional status of obesity, and how encapsulation can enhance the bioactive effects of these molecules. This integrative review aimed to discuss how the encapsulation of protein molecules impacts the nutritional status of obesity. From the studies selected following pre-established criteria, it was possible to infer that the encapsulation of proteins and peptides can contribute to greater efficiency in reducing weight gain, changes in adipose tissue function, and lower hormone levels that modulate appetite and body weight in animals with obesity.
Collapse
Affiliation(s)
- Rafael O. de A. Costa
- Biochemistry and Molecular Biology Postgraduate Program, Biosciences Center, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| | - Thaís S. Passos
- Nutrition Postgraduate Program, Center for Health Sciences, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| | - Eloyse Mikaelly de S. Silva
- Nutrition Course, Center for Health Sciences, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| | | | - Ana Heloneida de A. Morais
- Biochemistry and Molecular Biology Postgraduate Program, Biosciences Center, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Nutrition Course, Center for Health Sciences, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| |
Collapse
|
3
|
Yadav N, Kumar U, Roopmani P, Krishnan UM, Sethuraman S, Chauhan MK, Chauhan VS. Ultrashort Peptide-Based Hydrogel for the Healing of Critical Bone Defects in Rabbits. ACS APPLIED MATERIALS & INTERFACES 2022; 14:54111-54126. [PMID: 36401830 DOI: 10.1021/acsami.2c18733] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The use of hydrogels as scaffolds for three-dimensional (3D) cell growth is an active area of research in tissue engineering. Herein, we report the self-assembly of an ultrashort peptide, a tetrapeptide, Asp-Leu-IIe-IIe, the shortest peptide sequence from a highly fibrillogenic protein TDP-43, into the hydrogel. The hydrogel was mechanically strong and highly stable, with storage modulus values in MPa ranges. The hydrogel supported the proliferation and successful differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) in its matrix as assessed by cell viability, calcium deposition, alkaline phosphatase (ALP) activity, and the expression of osteogenic marker gene studies. To check whether the hydrogel supports 3D growth and regeneration in in vivo conditions, a rabbit critical bone defect model was used. Micro-computed tomography (CT) and X-ray analysis demonstrated the formation of mineralized neobone in the defect areas, with significantly higher bone mineralization and relative bone densities in animals treated with the peptide hydrogel compared to nontreated and matrigel treatment groups. The ultrashort peptide-based hydrogel developed in this work holds great potential for its further development as tissue regeneration and/or engineering scaffolds.
Collapse
Affiliation(s)
- Nitin Yadav
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi110067, India
- Delhi Institute of Pharmaceutical Sciences and Research, Mehrauli-Badarpur Road, Sector-3, Pushpvihar, New Delhi110017, India
| | - Utkarsh Kumar
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi110067, India
| | - Purandhi Roopmani
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA's Hub for Research & Innovation (SHRI), School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur613401, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA's Hub for Research & Innovation (SHRI), School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur613401, India
| | - Swaminathan Sethuraman
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA's Hub for Research & Innovation (SHRI), School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur613401, India
| | - Meenakshi K Chauhan
- Delhi Institute of Pharmaceutical Sciences and Research, Mehrauli-Badarpur Road, Sector-3, Pushpvihar, New Delhi110017, India
| | - Virander S Chauhan
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi110067, India
| |
Collapse
|
4
|
Bizeau J, Adam A, Nadal C, Francius G, Siniscalco D, Pauly M, Bégin-Colin S, Mertz D. Protein sustained release from isobutyramide-grafted stellate mesoporous silica nanoparticles. Int J Pharm X 2022; 4:100130. [PMID: 36156982 PMCID: PMC9494245 DOI: 10.1016/j.ijpx.2022.100130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 09/05/2022] [Indexed: 10/31/2022] Open
Abstract
Proteins are great therapeutic candidates as endogenous biomolecules providing a wide range of applications. However, their delivery suffers from some limitations and specifically designed delivery systems having an efficient protein anchoring and delivery strategy are still needed. In this work, we propose to combine large pore stellate mesoporous silica (STMS) with isobutyramide (IBAM), as a “glue” molecule which has been shown promising for immobilization of various biomacromolecules at silica surface. We address here for the first time the ability of such IBAM-modified NPs to sustainably deliver proteins over a prolonged time. In this work, a quantitative loading study of proteins (serum albumin (HSA), peroxidase (HRP), immunoglobulin (IgG) and polylysine (PLL)) on STMS@IBAM is first presented using three complementary detection techniques to ensure precision and avoid protein quantification issues. The results demonstrated a high loading capacity for HSA and HRP (≥ ca. 350 μg.mg−1) but a moderate one for IgG and PLL. After evaluating the physicochemical properties of the loaded particles and their stability over scaling-up and washings, the ability of STMS@IBAM to release proteins over prolonged time was evaluated in equilibrium (static) and flow mimicking (dynamic) conditions and at different temperatures (25, 37, 45 °C). Results show not only the potential of such “glue” functionalized STMS to release proteins in a sustained way, but also the retention of the biological activity of immobilized and released HRP, used as an enzyme model. Finally, an AFM-force spectroscopy study was conducted to decipher the interactions between IBAM and proteins, showing the involvement of different interactions in the adsorption and release processes. Isobutyramide bound stellate mesoporous silica allow the immobilization of various proteins. Protein release was achieved from the nanoparticles in a sustained way in buffer. Peroxidase activity was retained whether in immobilized or released conditions. Choice of protein detection techniques was shown to be crucial. AFM-spectroscopy was used to investigate IBAM-protein intermolecular bonding.
Collapse
|
5
|
Tang Y, Wang Z, Xiang L, Zhao Z, Cui W. Functional biomaterials for tendon/ligament repair and regeneration. Regen Biomater 2022; 9:rbac062. [PMID: 36176715 PMCID: PMC9514853 DOI: 10.1093/rb/rbac062] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/30/2022] [Accepted: 08/13/2022] [Indexed: 11/29/2022] Open
Abstract
With an increase in life expectancy and the popularity of high-intensity exercise, the frequency of tendon and ligament injuries has also increased. Owing to the specificity of its tissue, the rapid restoration of injured tendons and ligaments is challenging for treatment. This review summarizes the latest progress in cells, biomaterials, active molecules and construction technology in treating tendon/ligament injuries. The characteristics of supports made of different materials and the development and application of different manufacturing methods are discussed. The development of natural polymers, synthetic polymers and composite materials has boosted the use of scaffolds. In addition, the development of electrospinning and hydrogel technology has diversified the production and treatment of materials. First, this article briefly introduces the structure, function and biological characteristics of tendons/ligaments. Then, it summarizes the advantages and disadvantages of different materials, such as natural polymer scaffolds, synthetic polymer scaffolds, composite scaffolds and extracellular matrix (ECM)-derived biological scaffolds, in the application of tendon/ligament regeneration. We then discuss the latest applications of electrospun fiber scaffolds and hydrogels in regeneration engineering. Finally, we discuss the current problems and future directions in the development of biomaterials for restoring damaged tendons and ligaments.
Collapse
Affiliation(s)
- Yunkai Tang
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, P. R. China
| | - Zhen Wang
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, P. R. China
| | - Lei Xiang
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, P. R. China
| | - Zhenyu Zhao
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, P. R. China
| | - Wenguo Cui
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, P. R. China
| |
Collapse
|
6
|
Adala I, Ramis J, Ntone Moussinga C, Janowski I, Amer MH, Bennett AJ, Alexander C, Rose FRAJ. Mixed polymer and bioconjugate core/shell electrospun fibres for biphasic protein release. J Mater Chem B 2021; 9:4120-4133. [PMID: 33982048 DOI: 10.1039/d1tb00129a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Effective regenerative medicine requires delivery systems which can release multiple components at appropriate levels and at different phases of tissue growth and repair. However, there are few biomaterials and encapsulation techniques that are fully suitable for the loading and controlled release of multiple proteins. In this study we describe how proteins were physically and chemically loaded into a single coaxial electrospun fibre scaffold to obtain bi-phasic release profiles. Cyto-compatible polymers were used to construct the scaffold, using polyethylene oxide (PEO) for the core and polycaprolactone (PCL) reacted or mixed with (bis-aminopropyl)polyether (Jeffamine ED2003; JFA) for the shell. Horseradish peroxidase (HRP), a model protein, was loaded in the core and functionalised onto the scaffold surface by coupling of protein carboxyl groups to the available polymer amine groups. Fibre morphologies were evaluated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and functional group content was determined using X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (TOF SIMS). Hydrophobicity profiles of the fibres before and after protein loading were evaluated by water contact angle (WCA) and the mechanical properties of the electrospun scaffolds were determined by performing tensile tests. The electrospun fibre scaffolds generated by reacting PEO/PCL with 1,6-diaminohexane and those from mixing PEO/PCL with JFA were further characterised for protein conjugation and release. Fibres prepared by the mixed PEO/PCL/JFA system were found to be the most appropriate for the simultaneous release of protein from the core and the immobilisation of another protein on the shell of the same scaffold. Moreover, JFA enhanced scaffold properties in terms of porosity and elasticity. Finally, we successfully demonstrated the cytocompatibility and cell response to protein-loaded and -conjugated scaffolds using HepG2 cells. Enhanced cell attachment (2.5 fold) was demonstrated using bovine serum albumin (BSA)-conjugated scaffolds, and increased metabolic activity observed with retinoic acid (RA)-loaded scaffolds (2.7 fold).
Collapse
Affiliation(s)
- Inchirah Adala
- School of Pharmacy, University of Nottingham, Nottingham, UK.
| | - Jopeth Ramis
- School of Pharmacy, University of Nottingham, Nottingham, UK.
| | | | | | - Mahetab H Amer
- School of Molecular and Cellular Biology, University of Leeds, Leeds, UK
| | | | | | | |
Collapse
|
7
|
Production and Immunogenicity of a Tag-Free Recombinant Chimera Based on PfMSP-1 and PfMSP-3 Using Alhydrogel and Dipeptide-Based Hydrogels. Vaccines (Basel) 2021; 9:vaccines9070782. [PMID: 34358198 PMCID: PMC8310097 DOI: 10.3390/vaccines9070782] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/23/2021] [Accepted: 05/26/2021] [Indexed: 12/13/2022] Open
Abstract
A fusion chimeric vaccine comprising multiple protective domains of different blood-stage Plasmodium falciparum antigens is perhaps necessary for widening the protective immune responses and reducing the morbidity caused by the disease. Here we continue to build upon the prior work of developing a recombinant fusion chimera protein, His-tagged PfMSP-Fu24, by producing it as a tag-free recombinant protein. In this study, tag-free recombinant PfMSPFu24 (rFu24) was expressed in Escherichia coli, and the soluble protein was purified using a three-step purification involving ammonium sulphate precipitation followed by 2-step ion exchange chromatography procedures and shown that it was highly immunogenic with the human-compatible adjuvant Alhydrogel. We further investigated two dipeptides, phenylalanine-α, β-dehydrophenylalanine (FΔF) and Leucine-α, β-dehydrophenylalanine (LΔF) based hydrogels as effective delivery platforms for rFu24. These dipeptides self-assembled spontaneously to form a highly stable hydrogel under physiological conditions. rFu24 was efficiently entrapped in both the F∆F and L∆F hydrogels, and the three-dimensional (3D) mesh-like structures of the hydrogels remained intact after the entrapment of the antigen. The two hydrogels significantly stimulated rFu24-specific antibody titers, and the sera from the immunized mice showed an invasion inhibitory activity comparable to that of Alhydrogel. Easily synthesized dipeptide hydrogels can be used as an effective antigen delivery platform to induce immune responses.
Collapse
|
8
|
Hassan A, Ikram A, Raza A, Saeed S, Zafar Paracha R, Younas Z, Khadim MT. Therapeutic Potential of Novel Mastoparan-Chitosan Nanoconstructs Against Clinical MDR Acinetobacter baumannii: In silico, in vitro and in vivo Studies. Int J Nanomedicine 2021; 16:3755-3773. [PMID: 34103914 PMCID: PMC8179793 DOI: 10.2147/ijn.s296717] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 03/27/2021] [Indexed: 11/23/2022] Open
Abstract
PURPOSE Acinetobacter baumannii antibiotic resistant infections in high-risk patients are a great challenge for researchers and clinicians worldwide. In an effort to achieve potent bactericidal outcomes, a novel chitosan-mastoparan nanoconstruct (Mast-Cs NC) was designed and assessed for its therapeutic potential through in silico, in vitro and in vivo experimentation against clinical multidrug-resistant (MDR) A. baumannii. METHODS Optimized 3D structures of mastoparan and chitosan were coupled computationally through an ionic cross-linker to generate a circular ring of chitosan encasing mastoparan. The complex was assessed for interactions and stability through molecular dynamic simulation (MDS). Binding pocket analysis was used to assess the protease-peptide interface. Mast-Cs NC were prepared by the ionic gelation method. Mast-Cs NC were evaluated in vitro and in vivo for their therapeutic efficacy against drug-resistant clinical A. baumannii. RESULTS MDS for 100 ns showed stable bonds between chitosan and mastoparan; the first at chitosan oxygen atom-46 and mastoparan isoleucine carbon atom with a distance of 2.77 Å, and the second between oxygen atom-23 and mastoparan lysine nitrogen atom with a distance of 2.80 Å, and binding energies of -3.6 and -7.4 kcal/mol, respectively. Mast-Cs complexes approximately 156 nm in size, with +54.9 mV zeta potential and 22.63% loading capacity, offered >90% encapsulation efficiency and were found to be geometrically incompatible with binding pockets of various proteases. The MIC90 of Mast-Cs NC was significantly lower than that of chitosan (4 vs 512 μg/mL, respectively, p<0.05), with noticeable bacterial damage upon morphological analysis. In a BALB/c mouse sepsis model, a significant reduction in bacterial colony count in the Mast-Cs treated group was observed compared with chitosan and mastoparan alone (p<0.005). Mast-Cs maintained good biocompatibility and cytocompatibility. CONCLUSION Novel mastoparan-loaded chitosan nanoconstructs signify a successful strategy for achieving a synergistic bactericidal effect and higher therapeutic efficacy against MDR clinical A. baumannii isolates. The Mast-Cs nano-drug delivery system could work as an alternative promising treatment option against MDR A. baumannii.
Collapse
Affiliation(s)
- Afreenish Hassan
- Department of Microbiology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Aamer Ikram
- Department of Microbiology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Abida Raza
- NILOP Nanomedicine Research Laboratories, National Institute of Lasers and Optronics College, Pakistan Institute of Engineering and Applied Sciences, Islamabad, Pakistan
| | - Sidra Saeed
- NILOP Nanomedicine Research Laboratories, National Institute of Lasers and Optronics College, Pakistan Institute of Engineering and Applied Sciences, Islamabad, Pakistan
| | | | - Zumara Younas
- Department of Microbiology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Muhammad Tahir Khadim
- Department of Microbiology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan
| |
Collapse
|
9
|
Varanko A, Saha S, Chilkoti A. Recent trends in protein and peptide-based biomaterials for advanced drug delivery. Adv Drug Deliv Rev 2020; 156:133-187. [PMID: 32871201 PMCID: PMC7456198 DOI: 10.1016/j.addr.2020.08.008] [Citation(s) in RCA: 142] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/14/2020] [Accepted: 08/14/2020] [Indexed: 02/07/2023]
Abstract
Engineering protein and peptide-based materials for drug delivery applications has gained momentum due to their biochemical and biophysical properties over synthetic materials, including biocompatibility, ease of synthesis and purification, tunability, scalability, and lack of toxicity. These biomolecules have been used to develop a host of drug delivery platforms, such as peptide- and protein-drug conjugates, injectable particles, and drug depots to deliver small molecule drugs, therapeutic proteins, and nucleic acids. In this review, we discuss progress in engineering the architecture and biological functions of peptide-based biomaterials -naturally derived, chemically synthesized and recombinant- with a focus on the molecular features that modulate their structure-function relationships for drug delivery.
Collapse
Affiliation(s)
| | | | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.
| |
Collapse
|
10
|
Meng H, Deng S, You Y, Chan HF. The role of microfluidics in protein formulations with pre-programmed functional characteristics. Biologics 2018; 12:191-197. [PMID: 30584273 PMCID: PMC6284529 DOI: 10.2147/btt.s126725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Protein-based therapies hold great promise for treating many diseases. Nevertheless, the challenges of producing therapies with targeted attributes via standardized processes may hinder the development of protein formulations and clinical translation of the advanced therapies. Microfluidics represents a promising technology to develop protein formulations with pre-programmed functional characteristics, including size, morphology, and controlled drug release property. In this review, we discuss some examples of adopting microfluidics for fabricating particle- and fiber/tube-based formulations and highlight the advantages of microfluidics-assisted fabrication.
Collapse
Affiliation(s)
- Hu Meng
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong, China, .,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China,
| | - Shuai Deng
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong, China, .,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China,
| | - Yajing You
- Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Hon Fai Chan
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong, China, .,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China,
| |
Collapse
|
11
|
Zhong Y, Zeberl BJ, Wang X, Luo J. Combinatorial approaches in post-polymerization modification for rational development of therapeutic delivery systems. Acta Biomater 2018; 73:21-37. [PMID: 29654990 PMCID: PMC5985219 DOI: 10.1016/j.actbio.2018.04.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/07/2018] [Accepted: 04/04/2018] [Indexed: 12/12/2022]
Abstract
The combinatorial polymer library approach has been proven to be effective for the optimization of therapeutic delivery systems. The library of polymers with chemical diversity has been synthesized by (i) polymerization of functionalized monomers or (ii) post-polymerization modification of reactive polymers. Most scientists have followed the first approach so far, and the second method has emerged as a versatile approach for combinatorial biomaterials discovery. This review focuses on the second approach, especially discussing the post-modifications that employ reactive polymers as templates for combinatorial synthesis of a library of functional polymers with distinct structural diversity or a combination of different functionalities. In this way, the functional polymers have a consistent chain length and distribution, which allows for systematic optimization of therapeutic delivery polymers for the efficient delivery of genes, small-molecule drugs, and protein therapeutics. In this review, the modification of representative reactive polymers for the delivery of different therapeutic payloads are summarized. The recent advances in rational design and optimization of therapeutic delivery systems based on reactive polymers are highlighted. This review ends with a summary of the current achievements and the prospect on future directions in applying the approach of post-polymerization modification of polymers to accelerate the development of therapeutic delivery systems. STATEMENT OF SIGNIFICANCE A strategy to rationally design and systematically optimize polymers for the efficient delivery of specific therapeutics is highly needed. The combinatorial polymer library approach could be an effective way to this end. The post-polymerization modification of reactive polymer precursors is applicable for the combinatorial synthesis of a library of functional polymers with distinct structural diversity across a consistent degree of polymerization. This allows for parallel comparison and systematic evaluation/optimization of functional polymers for efficient therapeutic delivery. This review summarizes the key elements of this combinatorial polymer synthesis approach realized by post-polymerization modification of reactive polymer precursors towards the development and identification of optimal polymers for the efficient delivery of therapeutic agents.
Collapse
Affiliation(s)
- Yuanbo Zhong
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Brian J Zeberl
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Xu Wang
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
| | - Juntao Luo
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States; Upstate Cancer Center, State University of New York Upstate Medical University, Syracuse, NY 13210, United States.
| |
Collapse
|
12
|
Zbinden A, Browne S, Altiok EI, Svedlund FL, Jackson WM, Healy KE. Multivalent conjugates of basic fibroblast growth factor enhance in vitro proliferation and migration of endothelial cells. Biomater Sci 2018; 6:1076-1083. [PMID: 29595848 PMCID: PMC5930118 DOI: 10.1039/c7bm01052d] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Growth factors hold great promise for regenerative therapies. However, their clinical use has been halted by poor efficacy and rapid clearance from tissue, necessitating the delivery of extremely high doses to achieve clinical effectiveness which has raised safety concerns. Thus, strategies to either enhance growth factor activity at low doses or to increase their residence time within target tissues are necessary for clinical success. In this study, we generated multivalent conjugates (MVCs) of basic fibroblast growth factor (bFGF), a key growth factor involved in angiogenesis and wound healing, to hyaluronic acid (HyA) polymer chains. Multivalent bFGF conjugates (mvbFGF) were fabricated with minimal non-specific interaction observed between bFGF and the HyA chain. The hydrodynamic radii of mvbFGF ranged from ∼50 to ∼75 nm for conjugation ratios of bFGF to HyA chains at low (10 : 1) and high (30 : 1) feed ratios, respectively. The mvbFGF demonstrated enhanced bioactivity compared to unconjugated bFGF in assays of cell proliferation and migration, processes critical to angiogenesis and tissue regeneration. The 30 : 1 mvbFGF outperformed the 10 : 1 conjugate, which could be due to either FGF receptor clustering or interference with receptor mediated internalization and signal deactivation. This study simultaneously investigated the role of both protein to polymer ratio and multivalent conjugate size on their bioactivity, and determined that increasing the protein-to-polymer ratio and conjugate size resulted in greater cell bioactivity.
Collapse
Affiliation(s)
- Aline Zbinden
- Department of Bioengineering and California Institute for Quantitative Biosciences (QB3), University of California at Berkeley, Berkeley, California 94720, USA.
| | | | | | | | | | | |
Collapse
|
13
|
Sepantafar M, Maheronnaghsh R, Mohammadi H, Radmanesh F, Hasani-Sadrabadi MM, Ebrahimi M, Baharvand H. Engineered Hydrogels in Cancer Therapy and Diagnosis. Trends Biotechnol 2017; 35:1074-1087. [PMID: 28734545 DOI: 10.1016/j.tibtech.2017.06.015] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/19/2017] [Accepted: 06/22/2017] [Indexed: 02/06/2023]
Abstract
Over the last decade, numerous investigations have attempted to clarify the intricacies of tumor development to propose effective approaches for cancer treatment. Thanks to the unique properties of hydrogels, researchers have made significant progress in tumor model reconstruction, tumor diagnosis, and associated therapies. Notably, hydrogel-based systems can be adjusted to respond to cancer-specific hallmarks and/or external stimuli. These well-known drug reservoirs can be used as smart carriers for multiple cargos, including both naked and nanoparticle-encapsulated chemotherapeutics, genes, and radioisotopes. Recent works have attempted to specialize hydrogels for cancer research; we comprehensively review this topic for the first time, synthesizing past results and defining paths for future work.
Collapse
Affiliation(s)
- Mohammadmajid Sepantafar
- Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Reihan Maheronnaghsh
- Department of Genetics, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Hossein Mohammadi
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
| | - Fatemeh Radmanesh
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Mohammad Mahdi Hasani-Sadrabadi
- Parker H. Petit Institute for Bioengineering and Bioscience, G.W. Woodruff School of Mechanical Engineering and School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Marzieh Ebrahimi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hossein Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Developmental Biology, University of Science and Culture, Tehran, Iran.
| |
Collapse
|
14
|
Santos-Cancel M, White RJ. Collagen Membranes with Ribonuclease Inhibitors for Long-Term Stability of Electrochemical Aptamer-Based Sensors Employing RNA. Anal Chem 2017; 89:5598-5604. [PMID: 28440619 PMCID: PMC5653965 DOI: 10.1021/acs.analchem.7b00766] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Electrochemical aptamer-based (E-AB) sensors offer advantageous analytical detection abilities due to their rapid response time (seconds to minutes), specificity to a target, and selectivity to function in complex media. Ribonucleic acid (RNA) aptamers employed in this class of sensor offer favorable binding characteristics resulting from the ability of RNA to form stable tertiary folds aided by long-range intermolecular interactions. As a result, RNA aptamers can fold into three-dimensional structures more complex than those of their DNA counterparts and consequently exhibit better binding ability to target analytes. Unfortunately, RNA aptamers are susceptible to degradation by nucleases, and for this reason, RNA-based sensors are scarce or require significant sample pretreatment before use in clinically relevant media. Here, we combine the usefulness of a collagen I hydrogel membrane with entrapped ribonuclease inhibitors (RI) to protect small molecule RNA E-AB sensors from endogenous nucleases in complex media. More specifically, the biocompatibility of the naturally polymerized hydrogel with encapsulated RI promotes the protection of an aminoglycoside-binding RNA E-AB sensor up to 6 h, enabling full sensor function in nuclease-rich environments (undiluted serum) without the need for prior sample preparation or oligonucleotide modification. The use of collagen as a biocompatible membrane represents a general approach to compatibly interface E-AB sensors with complex biological samples.
Collapse
Affiliation(s)
- Mirelis Santos-Cancel
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County (UMBC), Baltimore, Maryland 21250
| | - Ryan J. White
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County (UMBC), Baltimore, Maryland 21250
| |
Collapse
|
15
|
Gupta M, Aina A, Boukari Y, Doughty S, Morris A, Billa N. Effect of volume of porogens on the porosity of PLGA scaffolds in pH-controlled environment. Pharm Dev Technol 2017; 23:207-210. [DOI: 10.1080/10837450.2017.1304415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Manish Gupta
- Drug Delivery Laboratory, School of Pharmacy, University of Nottingham Malaysia Campus, Semenyih, Malaysia
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Adeyinka Aina
- Drug Delivery Laboratory, School of Pharmacy, University of Nottingham Malaysia Campus, Semenyih, Malaysia
- Pharmaceutical Manufacturing Technology Centre, University of Limerick, Limerick, Ireland
| | - Yamina Boukari
- Drug Delivery Laboratory, School of Pharmacy, University of Nottingham Malaysia Campus, Semenyih, Malaysia
| | - Stephen Doughty
- Drug Delivery Laboratory, School of Pharmacy, University of Nottingham Malaysia Campus, Semenyih, Malaysia
- Penang Medical College, George Town, Malaysia
| | - Andrew Morris
- Drug Delivery Laboratory, School of Pharmacy, University of Nottingham Malaysia Campus, Semenyih, Malaysia
| | - Nashiru Billa
- Drug Delivery Laboratory, School of Pharmacy, University of Nottingham Malaysia Campus, Semenyih, Malaysia
| |
Collapse
|
16
|
Tang R, Jiang Z, Ray M, Hou S, Rotello VM. Cytosolic delivery of large proteins using nanoparticle-stabilized nanocapsules. NANOSCALE 2016; 8:18038-18041. [PMID: 27738697 PMCID: PMC5137506 DOI: 10.1039/c6nr07162g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report an effective intracellular delivery strategy for proteins of high molecular weight using AuNP stabilized capsules. This strategy provides direct delivery to the cytosol, avoiding endosomal entrapment.
Collapse
Affiliation(s)
- Rui Tang
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, USA.
| | - Ziwen Jiang
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, USA.
| | - Moumita Ray
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, USA.
| | - Singyuk Hou
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, USA.
| | - Vincent M Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, USA.
| |
Collapse
|
17
|
Walden G, Liao X, Donell S, Raxworthy MJ, Riley GP, Saeed A. A Clinical, Biological, and Biomaterials Perspective into Tendon Injuries and Regeneration. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:44-58. [PMID: 27596929 PMCID: PMC5312458 DOI: 10.1089/ten.teb.2016.0181] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Tendon injury is common and debilitating, and it is associated with long-term pain and ineffective healing. It is estimated to afflict 25% of the adult population and is often a career-ending disease in athletes and racehorses. Tendon injury is associated with high morbidity, pain, and long-term suffering for the patient. Due to the low cellularity and vascularity of tendon tissue, once damage has occurred, the repair process is slow and inefficient, resulting in mechanically, structurally, and functionally inferior tissue. Current treatment options focus on pain management, often being palliative and temporary and ending in reduced function. Most treatments available do not address the underlying cause of the disease and, as such, are often ineffective with variable results. The need for an advanced therapeutic that addresses the underlying pathology is evident. Tissue engineering and regenerative medicine is an emerging field that is aimed at stimulating the body's own repair system to produce de novo tissue through the use of factors such as cells, proteins, and genes that are delivered by a biomaterial scaffold. Successful tissue engineering strategies for tendon regeneration should be built on a foundation of understanding of the molecular and cellular composition of healthy compared with damaged tendon, and the inherent differences seen in the tissue after disease. This article presents a comprehensive clinical, biological, and biomaterials insight into tendon tissue engineering and regeneration toward more advanced therapeutics.
Collapse
Affiliation(s)
- Grace Walden
- 1 School of Pharmacy, University of East Anglia, Norwich, United Kingdom
| | - Xin Liao
- 1 School of Pharmacy, University of East Anglia, Norwich, United Kingdom
| | - Simon Donell
- 2 Norfolk and Norwich University Hospital, Norwich, United Kingdom .,3 Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Mike J Raxworthy
- 4 Neotherix Limited, York, United Kingdom .,5 University of Leeds, Leeds, United Kingdom
| | - Graham P Riley
- 6 School of Biological Sciences, University of East Anglia, Norwich, United Kingdom
| | - Aram Saeed
- 1 School of Pharmacy, University of East Anglia, Norwich, United Kingdom
| |
Collapse
|
18
|
Wang X, Shi C, Zhang L, Bodman A, Guo D, Wang L, Hall WA, Wilkens S, Luo J. Affinity-controlled protein encapsulation into sub-30 nm telodendrimer nanocarriers by multivalent and synergistic interactions. Biomaterials 2016; 101:258-71. [PMID: 27294543 PMCID: PMC4921341 DOI: 10.1016/j.biomaterials.2016.06.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 05/27/2016] [Accepted: 06/01/2016] [Indexed: 02/03/2023]
Abstract
Novel nanocarriers are highly demanded for the delivery of heterogeneous protein therapeutics for disease treatments. Conventional nanoparticles for protein delivery are mostly based on the diffusion-limiting mechanisms, e.g., physical trapping and entanglement. We develop herein a novel linear-dendritic copolymer (named telodendrimer) nanocarrier for efficient protein delivery by affinitive coating. This affinity-controlled encapsulation strategy provides nanoformulations with a small particle size (<30 nm), superior loading capacity (>50% w/w) and maintained protein bioactivity. We integrate multivalent electrostatic and hydrophobic functionalities synergistically into the well-defined telodendrimer scaffold to fine-tune protein binding affinity and delivery properties. The ion strength and density of the charged groups as well as the structure of the hydrophobic segments are important and their combinations in telodendrimers are crucial for efficient protein encapsulation. We have conducted a series of studies to understand the mechanism and kinetic process of the protein loading and release, utilizing electrophoresis, isothermal titration calorimetry, Förster resonance energy transfer spectroscopy, bio-layer interferometry and computational methods. The optimized nanocarriers are able to deliver cell-impermeable therapeutic protein intracellularly to kill cancer cells efficiently. In vivo imaging studies revealed cargo proteins preferentially accumulate in subcutaneous tumors and retention of peptide therapeutics is improved in an orthotopic brain tumor, these properties are evidence of the improved pharmacokinetics and biodistributions of protein therapeutics delivered by telodendrimer nanoparticles. This study presents a bottom-up strategy to rationally design and fabricate versatile nanocarriers for encapsulation and delivery of proteins for numerous applications.
Collapse
Affiliation(s)
- Xu Wang
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Changying Shi
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Li Zhang
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States; Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China
| | - Alexa Bodman
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Dandan Guo
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Lili Wang
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Walter A Hall
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Stephan Wilkens
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States
| | - Juntao Luo
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, NY 13210, United States; Upstate Cancer Center, State University of New York Upstate Medical University, Syracuse, NY 13210, United States.
| |
Collapse
|
19
|
Thota CK, Yadav N, Chauhan VS. "A novel highly stable and injectable hydrogel based on a conformationally restricted ultrashort peptide". Sci Rep 2016; 6:31167. [PMID: 27507432 PMCID: PMC4979021 DOI: 10.1038/srep31167] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 07/13/2016] [Indexed: 11/09/2022] Open
Abstract
Nanostructures including hydrogels based on peptides containing non protein amino acids are being considered as platform for drug delivery because of their inherent biocompatibility and additional proteolytic stability. Here we describe instantaneous self-assembly of a conformationally restricted dipeptide, LeuΔPhe, containing an α,β-dehydrophenylalanine residue into a highly stable and mechanically strong hydrogel, under mild physiological aqueous conditions. The gel successfully entrapped several hydrophobic and hydrophilic drug molecules and released them in a controlled manner. LeuΔPhe was highly biocompatible and easily injectable. Administration of an antineoplastic drug entrapped in the gel in tumor bearing mice significantly controlled growth of tumors. These characteristics make LeuΔPhe an attractive candidate for further development as a delivery platform for various biomedical applications.
Collapse
Affiliation(s)
- Chaitanya Kumar Thota
- International Centre for Genetic Engineering &Biotechnology Aruna Asaf Ali Marg, New Delhi-110067, India
| | - Nitin Yadav
- International Centre for Genetic Engineering &Biotechnology Aruna Asaf Ali Marg, New Delhi-110067, India
| | - Virander Singh Chauhan
- International Centre for Genetic Engineering &Biotechnology Aruna Asaf Ali Marg, New Delhi-110067, India
| |
Collapse
|
20
|
Lin Y, Chen Z, Liu XY. Using Inorganic Nanomaterials to Endow Biocatalytic Systems with Unique Features. Trends Biotechnol 2016; 34:303-315. [DOI: 10.1016/j.tibtech.2015.12.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 10/20/2015] [Accepted: 12/16/2015] [Indexed: 12/29/2022]
|
21
|
Cell-Demanded VEGF Release via Nanocapsules Elicits Different Receptor Activation Dynamics and Enhanced Angiogenesis. Ann Biomed Eng 2016; 44:1983-92. [PMID: 26940611 DOI: 10.1007/s10439-016-1581-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 02/26/2016] [Indexed: 12/15/2022]
Abstract
Although the delivery of vascular endothelial growth factor (VEGF) with extended release profiles has consistently shown beneficial therapeutic effects compared with bolus delivery, [Martino, M. M., F. Tortelli, M. Mochizuki, S. Traub, D. Ben-David, G. A. Kuhn, R. Muller, E. Livne, S. A. Eming, and J. A. Hubbell. Sci. Transl. Med. 3(100):100ra189, 2011; Martino, M. M., P. S. Briquez, A. Ranga, M. P. Lutolf, and J. A. Hubbell. Proc. Natl. Acad. Sci. USA. 110(12):4563-4568, 2013; Amiram, M., K. M. Luginbuhl, X. Li, M. N. Feinglos, and A. Chilkoti. Proc. Natl. Acad. Sci. USA. 110(8):2792-2797, 2013] it remains unclear if the reason is solely due to the physical availability and the reduced degradation of the protein. Here we studied the activation of VEGF receptor 2 (VR-2) by sustained released VEGF compared with bolus delivered VEGF to unveil that sustained delivery system alters the dynamics of receptor activation and affects the actions of cells between sprouting and proliferation. We utilized a protein nanocapsule delivery strategy that releases VEGF as mediated by extracellular proteases. These protein nanocapsules were synthesized through an aqueous assembly of a nanogel-peptide shell around the protein, leading to one to two proteins encapsulated per nanocapsule. Receptor activation studies revealed differential dynamics of receptor activation for slowly released VEGF compared with bolus delivered VEGF. As expected sustained released VEGF via nanocapsules resulted in enhanced vascular sprouting in vitro and in vivo. These studies demonstrate the physical presentation of VEGF, in this case of a slow release with time, can affect its molecular mechanism of actions and cause alterations in cellular responses and therapeutic outcomes.
Collapse
|
22
|
Steinbach JM, Seo YE, Saltzman WM. Cell penetrating peptide-modified poly(lactic-co-glycolic acid) nanoparticles with enhanced cell internalization. Acta Biomater 2016; 30:49-61. [PMID: 26602822 DOI: 10.1016/j.actbio.2015.11.029] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 11/10/2015] [Accepted: 11/16/2015] [Indexed: 01/13/2023]
Abstract
The surface modification of nanoparticles (NPs) can enhance the intracellular delivery of drugs, proteins, and genetic agents. Here we studied the effect of different surface ligands, including cell penetrating peptides (CPPs), on the cell binding and internalization of poly(lactic-co-glycolic) (PLGA) NPs. Relative to unmodified NPs, we observed that surface-modified NPs greatly enhanced cell internalization. Using one CPP, MPG (unabbreviated notation), that achieved the highest degree of internalization at both low and high surface modification densities, we evaluated the effect of two different NP surface chemistries on cell internalization. After 2h, avidin-MPG NPs enhanced cellular internalization by 5 to 26-fold relative to DSPE-MPG NP formulations. Yet, despite a 5-fold increase in MPG density on DSPE compared to Avidin NPs, both formulations resulted in similar internalization levels (48 and 64-fold, respectively) after 24h. Regardless of surface modification, all NPs were internalized through an energy-dependent, clathrin-mediated process, and became dispersed throughout the cell. Overall both Avidin- and DSPE-CPP modified NPs significantly increased internalization and offer promising delivery options for applications in which internalization presents challenges to efficacious delivery.
Collapse
|
23
|
Lindsey S, Piatt JH, Worthington P, Sönmez C, Satheye S, Schneider JP, Pochan DJ, Langhans SA. Beta Hairpin Peptide Hydrogels as an Injectable Solid Vehicle for Neurotrophic Growth Factor Delivery. Biomacromolecules 2015; 16:2672-83. [PMID: 26225909 PMCID: PMC4873771 DOI: 10.1021/acs.biomac.5b00541] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
There is intense interest in developing novel methods for the sustained delivery of low levels of clinical therapeutics. MAX8 is a peptide-based beta-hairpin hydrogel that has unique shear thinning properties that allow for immediate rehealing after the removal of shear forces, making MAX8 an excellent candidate for injectable drug delivery at a localized injury site. The current studies examined the feasibility of using MAX8 as a delivery system for nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF), two neurotrophic growth factors currently used in experimental treatments of spinal cord injuries. Experiments determined that encapsulation of NGF and BDNF within MAX8 did not negatively impact gel formation or rehealing and that shear thinning did not result in immediate growth factor release. ELISA, microscopy, rheology, and Western blotting experiments collectively demonstrate the functional capabilities of the therapeutic-loaded hydrogels to (i) maintain a protective environment against in vitro degradation of encapsulated therapeutics for at least 28 days; and (ii) allow for sustained release of NGF and BDGF capable of initiating neurite-like extensions of PC12 cells, most likely due to NGF/BDGF signaling pathways. Importantly, while the 21 day release profiles could be tuned by adjusting the MAX8 hydrogel concentration, the initial shear thinning of the hydrogel (e.g., during injection) does not induce significant premature loss of the encapsulated therapeutic, most likely due to effective trapping of growth factors within structurally robust domains that are maintained during the application of shear forces. Together, our data suggests that MAX8 allows for greater dosage control and sustained therapeutic growth factor delivery, potentially alleviating side effects and improving the efficacy of current therapies.
Collapse
Affiliation(s)
- Stephan Lindsey
- Nemours Center for Childhood Cancer Research, A. I. duPont Hospital for Children, Wilmington, DE 19803, USA
| | - Joseph H. Piatt
- Nemours Center for Childhood Cancer Research, A. I. duPont Hospital for Children, Wilmington, DE 19803, USA
| | - Peter Worthington
- Nemours Center for Childhood Cancer Research, A. I. duPont Hospital for Children, Wilmington, DE 19803, USA
- Biomedical Engineering Graduate Program, University of Delaware, Newark, DE 19716, USA
| | - Cem Sönmez
- Center for Cancer Research, NCI, Frederick, MD 21702, USA
| | - Sameer Satheye
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | | | - Darrin J. Pochan
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | - Sigrid A. Langhans
- Nemours Center for Childhood Cancer Research, A. I. duPont Hospital for Children, Wilmington, DE 19803, USA
| |
Collapse
|
24
|
Influence of Parathyroid Hormone-Loaded PLGA Nanoparticles in Porous Scaffolds for Bone Regeneration. Int J Mol Sci 2015; 16:20492-510. [PMID: 26343649 PMCID: PMC4613215 DOI: 10.3390/ijms160920492] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 08/05/2015] [Accepted: 08/07/2015] [Indexed: 11/16/2022] Open
Abstract
Biodegradable poly(lactide-co-glycolide) (PLGA) nanoparticles, containing human parathyroid hormone (PTH (1–34)), prepared by a modified double emulsion-solvent diffusion-evaporation method, were incorporated in porous freeze-dried chitosan-gelatin (CH-G) scaffolds. The PTH-loaded nanoparticles (NPTH) were characterised in terms of morphology, size, protein loading, release kinetics and in vitro assessment of biological activity of released PTH and cytocompatibility studies against clonal human osteoblast (hFOB) cells. Structural integrity of incorporated and released PTH from nanoparticles was found to be intact by using Tris-tricine SDS-PAGE. In vitro PTH release kinetics from PLGA nanoparticles were characterised by a burst release followed by a slow release phase for 3–4 weeks. The released PTH was biologically active as evidenced by the stimulated release of cyclic AMP from hFOB cells as well as increased mineralisation studies. Both in vitro and cell studies demonstrated that the PTH bioactivity was maintained during the fabrication of PLGA nanoparticles and upon release. Finally, a content of 33.3% w/w NPTHs was incorporated in CH-G scaffolds, showing an intermittent release during the first 10 days and, followed by a controlled release over 28 days of observation time. The increased expression of Alkaline Phosphatase levels on hFOB cells further confirmed the activity of intermittently released PTH from scaffolds.
Collapse
|
25
|
Singh B, Maharjan S, Jiang T, Kang SK, Choi YJ, Cho CS. Attuning hydroxypropyl methylcellulose phthalate to oral delivery vehicle for effective and selective delivery of protein vaccine in ileum. Biomaterials 2015; 59:144-59. [DOI: 10.1016/j.biomaterials.2015.04.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/04/2015] [Accepted: 04/08/2015] [Indexed: 11/28/2022]
|
26
|
Carballo-Molina OA, Velasco I. Hydrogels as scaffolds and delivery systems to enhance axonal regeneration after injuries. Front Cell Neurosci 2015; 9:13. [PMID: 25741236 PMCID: PMC4330895 DOI: 10.3389/fncel.2015.00013] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 01/09/2015] [Indexed: 01/24/2023] Open
Abstract
Damage caused to neural tissue by disease or injury frequently produces a discontinuity in the nervous system (NS). Such damage generates diverse alterations that are commonly permanent, due to the limited regeneration capacity of the adult NS, particularly the Central Nervous System (CNS). The cellular reaction to noxious stimulus leads to several events such as the formation of glial and fibrous scars, which inhibit axonal regeneration in both the CNS and the Peripheral Nervous System (PNS). Although in the PNS there is some degree of nerve regeneration, it is common that the growing axons reinnervate incorrect areas, causing mismatches. Providing a permissive substrate for axonal regeneration in combination with delivery systems for the release of molecules, which enhances axonal growth, could increase regeneration and the recovery of functions in the CNS or the PNS. Currently, there are no effective vehicles to supply growth factors or cells to the damaged/diseased NS. Hydrogels are polymers that are biodegradable, biocompatible and have the capacity to deliver a large range of molecules in situ. The inclusion of cultured neural cells into hydrogels forming three-dimensional structures allows the formation of synapses and neuronal survival. There is also evidence showing that hydrogels constitute an amenable substrate for axonal growth of endogenous or grafted cells, overcoming the presence of axonal regeneration inhibitory molecules, in both the CNS and PNS. Recent experiments suggest that hydrogels can carry and deliver several proteins relevant for improving neuronal survival and axonal growth. Although the use of hydrogels is appealing, its effectiveness is still a matter of discussion, and more results are needed to achieve consistent recovery using different parameters. This review also discusses areas of opportunity where hydrogels can be applied, in order to promote axonal regeneration of the NS.
Collapse
Affiliation(s)
- Oscar A. Carballo-Molina
- Instituto de Fisiología Celular-Neurociencias, Universidad Nacional Autónoma de MéxicoMexico, D.F., Mexico
| | - Iván Velasco
- Instituto de Fisiología Celular-Neurociencias, Universidad Nacional Autónoma de MéxicoMexico, D.F., Mexico
| |
Collapse
|
27
|
Choi WI, Kamaly N, Riol-Blanco L, Lee IH, Wu J, Swami A, Vilos C, Yameen B, Yu M, Shi J, Tabas I, von Andrian UH, Jon S, Farokhzad OC. A solvent-free thermosponge nanoparticle platform for efficient delivery of labile proteins. NANO LETTERS 2014; 14:6449-55. [PMID: 25333768 PMCID: PMC4245989 DOI: 10.1021/nl502994y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Protein therapeutics have gained attention recently for treatment of a myriad of human diseases due to their high potency and unique mechanisms of action. We present the development of a novel polymeric thermosponge nanoparticle for efficient delivery of labile proteins using a solvent-free polymer thermo-expansion mechanism with clinical potential, capable of effectively delivering a range of therapeutic proteins in a sustained manner with no loss of bioactivity, with improved biological half-lives and efficacy in vivo.
Collapse
Affiliation(s)
- Won Il Choi
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Nazila Kamaly
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Lorena Riol-Blanco
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - In-Hyun Lee
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Jun Wu
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Archana Swami
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Cristian Vilos
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
- Center
for Integrative Medicine and Innovative Science, Faculty of Medicine, Universidad Andres Bello, Santiago, Chile
| | - Basit Yameen
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Mikyung Yu
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Jinjun Shi
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Ira Tabas
- Department
of Medicine, Department of Pathology and Cell Biology, and Department of Physiology, Columbia University, New York, New York 10032, United States
| | - Ulrich H. von Andrian
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Sangyong Jon
- KAIST
Institute of the BioCentury, Department of Biological Sciences, Korea Advanced Institute of Science and Technology
(KAIST), Daejeon 305-701, Republic of Korea
| | - Omid C. Farokhzad
- Laboratory
of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham
and Women’s Hospital and Department of Microbiology and Immunobiology,
Division of Immunology, Harvard Medical
School, Boston, Massachusetts 02115, United States
- King
Abdulaziz University, Jeddah 21589, Saudi Arabia
- E-mail: . Tel: 617-732-6093. Fax: 617-730-2801
| |
Collapse
|
28
|
Three-dimensional biomaterial degradation — Material choice, design and extrinsic factor considerations. Biotechnol Adv 2014; 32:984-99. [DOI: 10.1016/j.biotechadv.2014.04.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 04/18/2014] [Accepted: 04/30/2014] [Indexed: 11/20/2022]
|
29
|
Osidak EO, Osidak MS, Akhmanova MA, Domogatskii SP. Collagen—A biomaterial for delivery of growth factors and tissue regeneration. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s107036321402039x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
30
|
Gonzalez JS, Nicolás P, Ferreira ML, Avena M, Lassalle VL, Alvarez VA. Fabrication of ferrogels using different magnetic nanoparticles and their performance on protein adsorption. POLYM INT 2013. [DOI: 10.1002/pi.4498] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jimena S. Gonzalez
- Composite Materials Group (CoMP), Institute of Materials Science and Technology (INTEMA); University of Mar del Plata and National Research Council (CONICET); Solís 7575, B7608FLC Mar del Plata Argentina
| | - Paula Nicolás
- Institute of Chemistry of the South (Inquisur; Universidad Nacional del Sur − CONICET); Avda Alem 1253 Bahía Blanca Argentina
| | - María Luján Ferreira
- Pilot Plant of Chemical Engineering (PLAPIQUI); Universidad Nacional del Sur − CONICET); Camino La Carrindanga km 7 Bahía Blanca Argentina
| | - Marcelo Avena
- Institute of Chemistry of the South (Inquisur; Universidad Nacional del Sur − CONICET); Avda Alem 1253 Bahía Blanca Argentina
| | - Verónica L. Lassalle
- Institute of Chemistry of the South (Inquisur; Universidad Nacional del Sur − CONICET); Avda Alem 1253 Bahía Blanca Argentina
| | - Vera A. Alvarez
- Composite Materials Group (CoMP), Institute of Materials Science and Technology (INTEMA); University of Mar del Plata and National Research Council (CONICET); Solís 7575, B7608FLC Mar del Plata Argentina
| |
Collapse
|
31
|
Azizi M, Farahmandghavi F, Joghataei M, Zandi M, Imani M, Bakhtiary M, Dorkoosh FA, Ghazizadeh F. Fabrication of protein-loaded PLGA nanoparticles: effect of selected formulation variables on particle size and release profile. JOURNAL OF POLYMER RESEARCH 2013. [DOI: 10.1007/s10965-013-0110-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
32
|
Abstract
Growth factors are soluble secreted proteins capable of affecting a variety of cellular processes important for tissue regeneration. Consequently, the self-healing capacity of patients can be augmented by artificially enhancing one or more processes important for healing through the application of growth factors. However, their application in clinics remains limited due to lack of robust delivery systems and biomaterial carriers. Interestingly, all clinically approved therapies involving growth factors utilize some sort of a biomaterial carrier for growth factor delivery. This suggests that biomaterial delivery systems are extremely important for successful usage of growth factors in regenerative medicine. This review outlines the role of growth factors in tissue regeneration, and their application in both pre-clinical animal models of regeneration and clinical trials is discussed. Additionally, current status of biomaterial substrates and sophisticated delivery systems such as nanoparticles for delivery of exogenous growth factors and peptides in humans are reviewed. Finally, issues and possible future research directions for growth factor therapy in regenerative medicine are discussed.
Collapse
Affiliation(s)
- Piyush Koria
- Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, FL 33620, USA.
| |
Collapse
|
33
|
Fritsche M, Pandey RB, Farmer BL, Heermann DW. Conformational temperature-dependent behavior of a histone H2AX: a coarse-grained Monte Carlo approach via knowledge-based interaction potentials. PLoS One 2012; 7:e32075. [PMID: 22442661 PMCID: PMC3307718 DOI: 10.1371/journal.pone.0032075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Accepted: 01/22/2012] [Indexed: 11/19/2022] Open
Abstract
Histone proteins are not only important due to their vital role in cellular processes such as DNA compaction, replication and repair but also show intriguing structural properties that might be exploited for bioengineering purposes such as the development of nano-materials. Based on their biological and technological implications, it is interesting to investigate the structural properties of proteins as a function of temperature. In this work, we study the spatial response dynamics of the histone H2AX, consisting of 143 residues, by a coarse-grained bond fluctuating model for a broad range of normalized temperatures. A knowledge-based interaction matrix is used as input for the residue-residue Lennard-Jones potential.We find a variety of equilibrium structures including global globular configurations at low normalized temperature (T* = 0.014), combination of segmental globules and elongated chains (T* = 0.016,0.017), predominantly elongated chains (T* = 0.019,0.020), as well as universal SAW conformations at high normalized temperature (T* ≥ 0.023). The radius of gyration of the protein exhibits a non-monotonic temperature dependence with a maximum at a characteristic temperature (T(c)* = 0.019) where a crossover occurs from a positive (stretching at T* ≤ T(c)*) to negative (contraction at T* ≥ T(c)*) thermal response on increasing T*.
Collapse
Affiliation(s)
- Miriam Fritsche
- Institute for Theoretical Physics, University of Heidelberg, Heidelberg, Germany.
| | | | | | | |
Collapse
|
34
|
Censi R, Di Martino P, Vermonden T, Hennink WE. Hydrogels for protein delivery in tissue engineering. J Control Release 2012; 161:680-92. [PMID: 22421425 DOI: 10.1016/j.jconrel.2012.03.002] [Citation(s) in RCA: 235] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 02/29/2012] [Accepted: 03/02/2012] [Indexed: 12/17/2022]
Abstract
Tissue defects caused by diseases or trauma present enormous challenges in regenerative medicine. Recently, a better understanding of the biological processes underlying tissue repair led to the establishment of new approaches in tissue engineering which comprise the combination of biodegradable scaffolds and appropriate cells together with specific environmental cues, such as growth or adhesive factors. These factors (in fact proteins) have to be loaded and sustainably released from the scaffolds in time. This review provides an overview of the various hydrogel technologies that have been proposed to control the release of bioactive molecules of interest for tissue engineering applications. In particular, after a brief introduction on bioactive protein drugs that have remarkable relevance for tissue engineering, this review will discuss their release mechanisms from hydrogels, their encapsulation and immobilization methods and will overview the main classes of hydrogel forming biomaterials used in vitro and in vivo to release them. Finally, an outlook on future directions and a glimpse into the current clinical developments are provided.
Collapse
Affiliation(s)
- Roberta Censi
- School of Pharmacy, University of Camerino, via S. Agostino 1, 62032, Camerino (MC), Italy.
| | | | | | | |
Collapse
|
35
|
Kim MS, Park SJ, Gu BK, Kim CH. Inter-connecting pores of chitosan scaffold with basic fibroblast growth factor modulate biological activity on human mesenchymal stem cells. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.11.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
36
|
Nandagiri VK, Gentile P, Chiono V, Tonda-Turo C, Matsiko A, Ramtoola Z, Montevecchi FM, Ciardelli G. Incorporation of PLGA nanoparticles into porous chitosan-gelatin scaffolds: influence on the physical properties and cell behavior. J Mech Behav Biomed Mater 2011; 4:1318-27. [PMID: 21783141 DOI: 10.1016/j.jmbbm.2011.04.019] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 04/23/2011] [Accepted: 04/25/2011] [Indexed: 10/18/2022]
Abstract
Bone regeneration can be accelerated by localized delivery of appropriate growth factors/biomolecules. Localized delivery can be achieved by a 2-level system: (i) incorporation of biomolecules within biodegradable particulate carriers (nanoparticles), and (ii) inclusion of such particulate carriers (nanoparticles) into suitable porous scaffolds. In this study, freeze-dried porous chitosan-gelatin scaffolds (CH-G: 1:2 ratio by weight) were embedded with various amounts of poly(lactide-co-glycolide) (PLGA) nanoparticles, precisely 16.6%, 33.3% and 66.6% (respect to CH-G weight). Scaffolds loaded with PLGA nanoparticles were subjected to physico-mechanical and biological characterizations including morphological analysis, swelling and dissolution tests, mechanical compression tests and cell viability tests. Results showed that incorporation of PLGA nanoparticles into porous crosslinked CH-G scaffolds: (i) changed the micro-architecture of the scaffolds in terms of mean pore diameter and pore size distribution, (ii) reduced the dissolution degree of the scaffolds, and (iii) increased the compressive modulus. On the other hand, the water uptake behavior of CH-G scaffolds containing PLGA nanoparticles significantly decreased. The incorporation of PLGA nanoparticles did not affect the biocompatibility of CH-G scaffolds.
Collapse
Affiliation(s)
- Vijay Kumar Nandagiri
- Department of Mechanics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Branco MC, Pochan DJ, Wagner NJ, Schneider JP. The effect of protein structure on their controlled release from an injectable peptide hydrogel. Biomaterials 2010; 31:9527-34. [PMID: 20952055 DOI: 10.1016/j.biomaterials.2010.08.047] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Accepted: 08/19/2010] [Indexed: 12/20/2022]
Abstract
Hydrogel materials are promising vehicles for the delivery of protein therapeutics. Proteins can impart physical interactions, both steric and electrostatic in nature, that influence their release from a given gel network. Here, model proteins of varying hydrodynamic diameter and charge are directly encapsulated and their release studied from electropositive fibrillar hydrogels prepared from the self-assembling peptide, MAX8. Hydrogelation of MAX8 can be triggered in the presence of proteins for their direct encapsulation with neither effect on protein structure nor the hydrogel's mechanical properties. Bulk release of the encapsulated proteins from the hydrogels was assessed for a month time period at 37 °C before and after syringe delivery of the loaded gels to determine the influence of the protein structure on release. Release of positively charged and neutral proteins was largely governed by the sterics imposed by the network. Conversely, negatively charged proteins interacted strongly with the positively charged fibrillar network, greatly restricting their release to <10% of the initial protein load. Partition and retention studies indicated that electrostatic interactions dictate the amount of protein available for release. Importantly, when protein encapsulated gels were delivered via syringe, the release profiles of the macromolecules show the similar trends as those observed for non-sheared gels. This study demonstrates that proteins can be directly encapsulated in self assembled MAX8 hydrogels, which can then be syringe delivered to a site where subsequent release is controlled by protein structure.
Collapse
Affiliation(s)
- Monica C Branco
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD 21701, USA
| | | | | | | |
Collapse
|
38
|
Toward delivery of multiple growth factors in tissue engineering. Biomaterials 2010; 31:6279-308. [PMID: 20493521 DOI: 10.1016/j.biomaterials.2010.04.053] [Citation(s) in RCA: 450] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Accepted: 04/22/2010] [Indexed: 02/06/2023]
Abstract
Inspired by physiological events that accompany the "wound healing cascade", the concept of developing a tissue either in vitro or in vivo has led to the integration of a wide variety of growth factors (GFs) in tissue engineering strategies in an effort to mimic the natural microenvironments of tissue formation and repair. Localised delivery of exogenous GFs is believed to be therapeutically effective for replication of cellular components involved in tissue development and the healing process, thus making them important factors for tissue regeneration. However, any treatment aiming to mimic the critical aspects of the natural biological process should not be limited to the provision of a single GF, but rather should release multiple therapeutic agents at an optimised ratio, each at a physiological dose, in a specific spatiotemporal pattern. Despite several obstacles, delivery of more than one GF at rates mimicking an in vivo situation has promising potential for the clinical management of severely diseased tissues. This article summarises the concept of and early approaches toward the delivery of dual or multiple GFs, as well as current efforts to develop sophisticated delivery platforms for this ambitious purpose, with an emphasis on the application of biomaterials-based deployment technologies that allow for controlled spatial presentation and release kinetics of key biological cues. Additionally, the use of platelet-rich plasma or gene therapy is addressed as alternative, easy, cost-effective and controllable strategies for the release of high concentrations of multiple endogenous GFs, followed by an update of the current progress and future directions of research utilising release technologies in tissue engineering and regenerative medicine.
Collapse
|
39
|
Ghosh P, Yang X, Arvizo R, Zhu ZJ, Agasti SS, Mo Z, Rotello VM. Intracellular delivery of a membrane-impermeable enzyme in active form using functionalized gold nanoparticles. J Am Chem Soc 2010; 132:2642-5. [PMID: 20131834 PMCID: PMC2830715 DOI: 10.1021/ja907887z] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Gold nanoparticles were coated with a short peptide to promote intracellular delivery of membrane-impermeable proteins. Through microscopy and enzyme assays, we demonstrated the particles were able to transport functional enzymes into a variety of cell lines. Significantly, the transported proteins were able to escape from endosomes. Moreover, these particles showed no apparent cytotoxicity.
Collapse
Affiliation(s)
- Partha Ghosh
- Department of Chemistry, University of Massachusetts at Amherst, USA, 01003
| | - Xiaochao Yang
- Department of Chemistry, University of Massachusetts at Amherst, USA, 01003
- College of Bioengineering and Microsystem Research Center, Chongqing University, China, 400044
| | - Rochelle Arvizo
- Department of Chemistry, University of Massachusetts at Amherst, USA, 01003
| | - Zheng-Jiang Zhu
- Department of Chemistry, University of Massachusetts at Amherst, USA, 01003
| | - Sarit S. Agasti
- Department of Chemistry, University of Massachusetts at Amherst, USA, 01003
| | - Zhihong Mo
- College of Bioengineering and Microsystem Research Center, Chongqing University, China, 400044
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts at Amherst, USA, 01003
| |
Collapse
|
40
|
A tissue-engineered approach towards retinal repair: scaffolds for cell transplantation to the subretinal space. Graefes Arch Clin Exp Ophthalmol 2010; 248:763-78. [PMID: 20169358 DOI: 10.1007/s00417-009-1263-7] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2009] [Revised: 11/16/2009] [Accepted: 11/26/2009] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Several mechanisms of retina degeneration result in the deterioration of the outer retina and can lead to blindness. Currently, with the exception of anti-angiogenic treatments for wet age-related macular degeneration, there are no treatments that can restore lost vision. There is evidence that photoreceptors and embryonic retinal tissue, transplanted to the subretinal space, can form new synapses with surviving host neurons. However, these transplants have yet to result in a clinical treatment for retinal degeneration. METHODS This article reviews the current literature on the transplantation of scaffolds with retinal and retinal pigmented epithelial (RPE) cells to the subretinal space. We discuss the types of cells and materials that have been investigated for transplantation to the subretinal space, summarize the current findings, and present opportunities for future research and the next generation of scaffolds for retinal repair. RESULTS Challenges to cell transplantation include limited survival upon implantation and the formation of abnormal cell architectures in vivo. Scaffolds have been shown to enhance cell survival and direct cell differentiation and organization in a number of models of retinal degeneration. CONCLUSIONS The transplantation of cells within a scaffold represents a possible treatment to repair retinal degeneration and restore vision in effected patients. Materials have been developed for the delivery of retinal and RPE cells separately however, the development of a combined tissue-engineered scaffold targeting both cell populations represents a promising direction for retinal repair.
Collapse
|
41
|
Abstract
One of the most significant advances in medical history is the discovery and development of antibiotics, which in the middle of last century was flourishing and appeared to be the ultimate solution to the treatment of life-threatening human bacterial diseases. However, lately there has been a huge decline in the rate of discovery of new antimicrobial intervention strategies in parallel with an increasing incidence of multidrug-resistant pathogens; if these circumstances do not change we will continue to approach the end of the antibiotic era. Facing this dark future, scientists are considering new strategies for intervention tailored around the appropriate (selective) stimulation of the host's immune system, and particularly rapid acting innate immunity, as an alternative to direct targeting of microbial pathogens. One recent player in such an immunomodulatory strategy is the naturally occurring host defence peptides (HDP) and their synthetic innate defence regulator (IDR) analogues. In this chapter, we will discuss the potential therapeutic use of HDPs and IDRs as immunomodulatory agents.
Collapse
Affiliation(s)
- Håvard Jenssen
- Department of Science, Systems, and Models, Roskilde University, Roskilde, Denmark
| | | |
Collapse
|
42
|
Luo X, Liu S, Zhou J, Zhang L. In situ synthesis of Fe3O4/cellulose microspheres with magnetic-induced protein delivery. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b900103d] [Citation(s) in RCA: 183] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Hamill P, Brown K, Jenssen H, Hancock REW. Novel anti-infectives: is host defence the answer? Curr Opin Biotechnol 2008; 19:628-36. [PMID: 19000763 DOI: 10.1016/j.copbio.2008.10.006] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Revised: 10/10/2008] [Accepted: 10/16/2008] [Indexed: 02/06/2023]
Abstract
Resistance to antimicrobial agents and the limited development of novel agents are threatening to worsen the burden of infections that are already a leading cause of morbidity and mortality. This has increased interest in the development of novel strategies such as selective modulation of our natural immune defences. Innate immunity is a complex, evolutionarily conserved, multi-facetted response to defeating infection that is naturally stimulated by pathogenic organisms through pattern recognition receptors on host cells. It is amplifiable and broad spectrum but if overstimulated can lead to the potential for harmful inflammatory responses. A broad variety of therapies are already available or increasingly under development, to stimulate protective innate immunity without overtly stimulating harmful inflammation or even suppressing such damaging pro-inflammatory responses.
Collapse
Affiliation(s)
- Pamela Hamill
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, 2259 Lower Mall, Vancouver, British Columbia, Canada, V6T 1Z3
| | | | | | | |
Collapse
|
44
|
Affiliation(s)
- James C Y Dunn
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA.
| |
Collapse
|