1
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Vidallon MLP, King JP, Giles LW, Crawford SA, Baldwin C, Premilovac D, Mian Teo B, Bishop AI, de Campo L, Tabor RF. Studying the photothermal activation of polydopamine-shelled, phase-change emulsion droplets into microbubbles using small- and ultra-small-angle neutron scattering. J Colloid Interface Sci 2024; 659:1029-1041. [PMID: 38241974 DOI: 10.1016/j.jcis.2024.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/29/2023] [Accepted: 01/02/2024] [Indexed: 01/21/2024]
Abstract
Polydopamine-shelled perfluorocarbon (PDA/PFC) emulsion droplets are promising candidates for medical imaging and drug delivery applications. This study investigates their phase transition into microbubbles under near-infrared (NIR) illumination in situ using small- and ultra-small-angle neutron scattering (SANS and USANS) and contrast variation techniques. Supported by optical microscopy, thermogravimetric analysis, and ultrasound imaging, SANS and USANS results reveal rapid phase transition rates upon NIR illumination, dependent on PFC content and droplet size distribution. Specifically, perfluoropentane droplets rapidly transform into bubbles upon NIR irradiation, whereas perfluorohexane droplets exhibit greater resistance to phase change (bulk boiling points = 30 °C and 60 °C, respectively). Furthermore, smaller emulsion droplets with unimodal distribution resist NIR-triggered phase changes better than their bimodal counterparts. This observation is attributable to the lower boiling points of large emulsion droplets (lower Laplace pressure than smaller droplets) and the faster photothermal heating rates due to their thicker polydopamine shells. The insights gained from these techniques are crucial for designing phase-change emulsions activated by NIR for photothermal therapies and controlled drug delivery.
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Affiliation(s)
- Mark Louis P Vidallon
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia; Molecular Imaging and Theranostics Laboratory, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC 3004, Australia; Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, VIC 3010, Australia; Baker Department of Cardiovascular Research, Translation and Implementation, La Trobe Institute for Molecular Science University of Melbourne, Parkville VIC 3010, Australia.
| | - Joshua P King
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Luke W Giles
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Simon A Crawford
- Ramaciotti Centre for Cryo-Electron Microscopy, Monash University, Clayton, VIC 3800, Australia
| | - Chris Baldwin
- Australian Nuclear Science and Technology Organization (ANSTO), New Illawarra Rd, Lucas Heights, NSW 2234, Australia
| | - Dino Premilovac
- Tasmanian School of Medicine, University of Tasmania, 17 Liverpool Street, Hobart, TAS, 7000, Australia
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Alexis I Bishop
- School of Physics and Astronomy, Monash University, Clayton, VIC, 3800, Australia
| | - Liliana de Campo
- Australian Nuclear Science and Technology Organization (ANSTO), New Illawarra Rd, Lucas Heights, NSW 2234, Australia.
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
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2
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Lu Z, Acter S, Teo BM, Bishop AI, Tabor RF, Vidallon MLP. Mesoporous, anisotropic nanostructures from bioinspired polymeric catecholamine neurotransmitters and their potential application as photoacoustic imaging agents. J Mater Chem B 2022; 10:9662-9670. [PMID: 36382405 DOI: 10.1039/d2tb01756c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Mesoporous polydopamine (PDA) nanobowls, which can be prepared using Pluronic® F-127, ammonia, and 1,3,5-trimethylbenzene (TMB), are one of the most studied anisotropic nanoparticle systems. However, only limited reports on polymerised analogues polynorepinephrine (PNE) and polyepinephrine (PEP) exist. Herein, we present modifications to a one-pot, soft template method, originally applied to make PDA nanobowls, to fabricate new shape-anisotropic nanoparticles (mesoporous nanospheres or "nano-golf balls" and nanobowls) using PNE and PEP for the first time. These modifications include the use of different oil phases (TMB, toluene and o-xylene) and ammonia concentrations to induce anisotropic growth of PDA, PNE, and PEP particles. Moreover, this work features the application of oddly shaped PDA, PNE, and PEP nanoparticles as intravascular photoacoustic imaging enhancers in Intralipid®-India ink-based tissue-mimicking phantoms. Photoacoustic imaging experiments showed that mesoporous nanobowls exhibit stronger enhancement, in comparison to their mesoporous nano-golf ball and nanoaggregate counterparts. The photoacoustic enhancement also followed the general trend PDA > PNE > PEP due to the differences in the rates of polymerisation of the monomers and the optical absorption of the resulting polymers. Lastly, about two- to four-fold enhancement in photoacoustic signals was observed for the mesoporous nanostructures, when compared to smooth nanospheres and their nano-aggregates. These results suggest that shape manipulation can aid in overcoming the inherently lower performance of PNE and PEP as photoacoustic imaging agents, compared to PDA. Since nanomaterials with mesoporous and anisotropic morphologies have significant, unexplored potential with emerging applications, these results set the groundwork for future studies on photoacoustically active oddly shaped PNE- and PEP-based nanosystems.
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Affiliation(s)
- Zhenzhen Lu
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
| | - Shahinur Acter
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
| | - Alexis I Bishop
- School of Physics and Astronomy, Monash University, Clayton, VIC, 3800, Australia
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
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3
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Lu Z, Teo BM, Tabor RF. Recent developments in polynorepinephrine: an innovative material for bioinspired coatings and colloids. J Mater Chem B 2022; 10:7895-7904. [PMID: 36106821 DOI: 10.1039/d2tb01335e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
While applications of polydopamine (PDA) are exponentially growing, research concerning the closely related neurotransmitter derivative polynorepinephrine (PNE) is in paucity, even though norepinephrine shares dopamine's ability to self-polymerize and form a coating film that is nearly substrate-agnostic. In this review, we demonstrate that PNE can be used as an alternative to PDA with equal or ever superior performance. PNE offers a thinner and smoother coating surface and thus is capable of more effectively resisting fouling by biofoulants, enhancing cell adhesion capability, surface hydrophilicity and biomolecule immobilisation. With the abundance of catechol, amino and hydroxyl groups in PNE's structure, PNE can perform as an electron donor and receiver at the same time and initiate ring opening and redox reactions. It has also been shown that PNE has the potential to be used as a biosensor due to its bioconjugation and molecular recognition ability. Here, we summarise the applications of PNE to date and discuss its potential research directions in the near future.
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Affiliation(s)
- Zhenzhen Lu
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
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4
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Vidallon MLP, Teo BM, Bishop AI, Tabor RF. Next-Generation Colloidal Materials for Ultrasound Imaging Applications. Ultrasound Med Biol 2022; 48:1373-1396. [PMID: 35641393 DOI: 10.1016/j.ultrasmedbio.2022.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 06/15/2023]
Abstract
Ultrasound has important applications, predominantly in the field of diagnostic imaging. Presently, colloidal systems such as microbubbles, phase-change emulsion droplets and particle systems with acoustic properties and multiresponsiveness are being developed to address typical issues faced when using commercial ultrasound contrast agents, and to extend the utility of such systems to targeted drug delivery and multimodal imaging. Current technologies and increasing research data on the chemistry, physics and materials science of new colloidal systems are also leading to the development of more complex, novel and application-specific colloidal assemblies with ultrasound contrast enhancement and other properties, which could be beneficial for multiple biomedical applications, especially imaging-guided treatments. In this article, we review recent developments in new colloids with applications that use ultrasound contrast enhancement. This work also highlights the emergence of colloidal materials fabricated from or modified with biologically derived and bio-inspired materials, particularly in the form of biopolymers and biomembranes. Challenges, limitations, potential developments and future directions of these next-generation colloidal systems are also presented and discussed.
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Affiliation(s)
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, Victoria, Australia
| | - Alexis I Bishop
- School of Physics and Astronomy, Monash University, Clayton, Victoria, Australia
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, Victoria, Australia.
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5
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Vidallon MLP, Salimova E, Crawford SA, Teo BM, Tabor RF, Bishop AI. Enhanced photoacoustic imaging in tissue-mimicking phantoms using polydopamine-shelled perfluorocarbon emulsion droplets. Ultrason Sonochem 2022; 86:106041. [PMID: 35617883 PMCID: PMC9136156 DOI: 10.1016/j.ultsonch.2022.106041] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 05/10/2022] [Accepted: 05/14/2022] [Indexed: 05/05/2023]
Abstract
The current work features process parameters for the ultrasound (25 kHz)-assisted fabrication of polydopamine-shelled perfluorocarbon (PDA/PFC) emulsion droplets with bimodal (modes at 100-600 nm and 1-6 µm) and unimodal (200-600 nm) size distributions. Initial screening of these materials revealed that only PDA/PFC emulsion droplets with bimodal distributions showed photoacoustic signal enhancement due to large size of their optically absorbing PDA shells. Performance of this particular type of emulsion droplets as photoacoustic agents were evaluated in Intralipid®-India ink media, mimicking the optical scattering and absorbanceof various tissuetypes. From these measurements, it was observed that PDA/PFC droplets with bimodal size distributions can enhance the photoacoustic signal of blood-mimicking phantom by up to five folds in various tissue-mimicking phantoms with absorption coefficients from 0.1 to 1.0 cm-1. Furthermore, using the information from enhanced photoacoustic images at 750 nm, the ultimate imaging depth was explored for polydopamine-shelled, perfluorohexane (PDA/PFH) emulsion droplets by photon trajectory simulations in 3D using a Monte Carlo approach. Based on these simulations, maximal tissue imaging depths for PDA/PFH emulsion droplets range from 10 to 40 mm, depending on the tissue type. These results demonstrate for the first time that ultrasonically fabricated PDA/PFC emulsion droplets have great potential as photoacoustic imaging agents that can be complemented with other reported characteristics of PDA/PFC emulsion droplets for extended applications in theranostics and other imaging modalities.
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Affiliation(s)
| | - Ekaterina Salimova
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia; Monash Biomedical Imaging, Monash University, Clayton, VIC 3800, Australia
| | - Simon A Crawford
- Ramaciotti Centre for Cryo-Electron Microscopy, Monash University, Clayton, VIC 3800, Australia
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Alexis I Bishop
- School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia.
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6
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Acter S, Vidallon MLP, King JP, Teo BM, Tabor RF. Photothermally responsive Pickering emulsions stabilised by polydopamine nanobowls. J Mater Chem B 2021; 9:8962-8970. [PMID: 34569589 DOI: 10.1039/d1tb01796a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Pickering emulsions with stimuli responsive properties have attracted mounting research attention owing to their potential for on-demand destabilisation of emulsions. However, a combination of biocompatibility and long-term stability are essential to efficiently apply such systems in biomedical applications, and this remains a significant challenge. To address current limitations, here we report the formation of photothermally responsive oil-in-water (o/w) Pickering emulsions fabricated using biocompatible stabilisers and showing prolonged stability. For the first time, we explore polydopamine (PDA) bowl-shaped mesoporous nanoparticles (PDA nanobowls) as a Pickering stabiliser without any surface modification or other stabiliser present. As-prepared PDA nanobowl-stabilised Pickering emulsions are shown to be pH responsive, and more significantly show high photothermal efficiency under near-infrared illumination due the incorporation of PDA into the system, which has remarkable photothermal response. These biocompatible, photothermally responsive o/w Pickering emulsion systems show potential in controlled drug release applications stimulated by NIR illumination.
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Affiliation(s)
- Shahinur Acter
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
| | | | - Joshua P King
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
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7
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Vidallon MLP, Giles LW, Pottage MJ, Butler CSG, Crawford SA, Bishop AI, Tabor RF, de Campo L, Teo BM. Tracking the heat-triggered phase change of polydopamine-shelled, perfluorocarbon emulsion droplets into microbubbles using neutron scattering. J Colloid Interface Sci 2021; 607:836-847. [PMID: 34536938 DOI: 10.1016/j.jcis.2021.08.162] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/15/2021] [Accepted: 08/24/2021] [Indexed: 01/12/2023]
Abstract
Perfluorocarbon emulsion droplets are hybrid colloidal materials with vast applications, ranging from imaging to drug delivery, due to their controllable phase transition into microbubbles via heat application or acoustic droplet vapourisation. The current work highlights the application of small- and ultra-small-angle neutron scattering (SANS and USANS), in combination with contrast variation techniques, in observing the in situ phase transition of polydopamine-shelled, perfluorocarbon (PDA/PFC) emulsion droplets with controlled polydispersity into microbubbles upon heating. We correlate these measurements with optical and transmission electron microscopy imaging, dynamic light scattering, and thermogravimetric analysis to characterise these emulsions, and observe their phase transition into microbubbles. Results show that the phase transition of PDA/PFC droplets with perfluorohexane (PFH), perfluoropentane (PFP), and PFH-PFP mixtures occur at temperatures that are around 30-40 °C higher than the boiling points of pure liquid PFCs, and this is influenced by the specific PFC compositions (perfluorohexane, perfluoropentane, and mixtures of these PFCs). Analysis and model fitting of neutron scattering data allowed us to monitor droplet size distributions at different temperatures, giving valuable insights into the transformation of these polydisperse, emulsion droplet systems.
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Affiliation(s)
| | - Luke W Giles
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Matthew J Pottage
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Calum S G Butler
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Simon A Crawford
- Ramaciotti Centre for Cryo-Electron Microscopy, Monash University, Clayton, VIC 3800, Australia
| | - Alexis I Bishop
- School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Liliana de Campo
- Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Rd, Lucas Heights, NSW 2234, Australia.
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
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8
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Lu Z, Giles LW, Tabor RF, Teo BM. Norepinephrine derived carbon dots for live-cell imaging and effective hemoglobin determination. Soft Matter 2021; 17:6765-6772. [PMID: 34196338 DOI: 10.1039/d1sm00791b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Recently, carbon dots (CDs) have attracted wide attention for their potential use as fluorescence probes in biological and analytical chemistry due to their great stability and high fluorescence quantum yields. In our work, norepinephrine (NE)-derived CDs with green luminescence and an average size of 10 nm were fabricated using a one-step hydrothermal route. As-prepared CDs show a strong emission at a wavelength of 520 nm when excited at 420 nm, and demonstrate pH and concentration dependent fluorescence behaviour. Multiple functional groups on the CDs allow their protonation/deprotonation and thus alter fluorescence intensity and peak position in different pH conditions. Prepared CDs show significant potential to be used as a live-cell imaging agent with long-term photostability. Furthermore, a simple but effective method to determine the concentration of hemoglobin (Hb) in diluted human blood samples was also developed based on the inner filter effect (IFE). The method demonstrates good linearity from 0.01-10 μM, with a limit of determination (LOD) of 52 nM.
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Affiliation(s)
- Zhenzhen Lu
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Luke W Giles
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
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9
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Vidallon MLP, Teo BM. Recent developments in biomolecule-based nanoencapsulation systems for antimicrobial delivery and biofilm disruption. Chem Commun (Camb) 2021; 56:13907-13917. [PMID: 33146161 DOI: 10.1039/d0cc05880g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biomolecules are very attractive nanomaterial components, generally, due to their biocompatibility, biodegradability, abundance, renewability, and sustainability, as compared to other resources for nanoparticle-based delivery systems. Biomolecule-based nanoencapsulation and nanodelivery systems can be designed and engineered for antimicrobial cargos in order to surmount classical and current challenges, including the emergence of multi-drug resistant strains of microorganisms, the low effectiveness and limitations in the applicability of the present antimicrobials, and biofilm formation. This feature article highlights the recent applications and capabilities of biomacromolecule-based nanomaterials for the delivery and activity enhancement of antimicrobials, and disruption of biofilms. Unique properties of some nanomaterials, arising from specific biomacromolecules, were also emphasized. We expect that this review will be helpful to researchers in engineering new types of antimicrobial nanocarriers, hybrid particles and colloidal systems with tailored properties.
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Affiliation(s)
- Mark Louis P Vidallon
- School of Chemistry, Faculty of Science, Monash University, Clayton, VIC 3800, Australia.
| | - Boon Mian Teo
- School of Chemistry, Faculty of Science, Monash University, Clayton, VIC 3800, Australia.
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10
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Vidallon MLP, Giles LW, Crawford S, Bishop AI, Tabor RF, de Campo L, Teo BM. Exploring the transition of polydopamine-shelled perfluorohexane emulsion droplets into microbubbles using small- and ultra-small-angle neutron scattering. Phys Chem Chem Phys 2021; 23:9843-9850. [PMID: 33908524 DOI: 10.1039/d1cp01146d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Perfluorocarbon emulsion droplets are interesting colloidal systems with applications, ranging from diagnostics and theranostics to drug delivery, due to their controllable phase transition into microbubbles via heat application or acoustic droplet vapourisation. This work highlights the application of small- and ultra-small-angle neutron scattering (SANS and USANS, respectively), in combination with contrast variation techniques, in observing the in situ phase transition of polydopamine-stabilised perfluorohexane (PDA/PFH) emulsion droplets into microbubbles during heating. Results show peak USANS intensities at temperatures around 90 °C, which indicates that the phase transition of PDA/PFH emulsion droplets occurs at significantly higher temperatures than the bulk boiling point of pure liquid PFH (56 °C). Analysis and model fitting of the SANS and USANS data allowed us to estimate droplet sizes and interfacial properties at different temperatures (20 °C, 90 °C, and 20 °C after cooling), giving valuable insights about the transformation of these polydisperse emulsion droplet systems.
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11
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Vidallon MLP, Tabor RF, Bishop AI, Teo BM. Ultrasound-assisted fabrication of acoustically active, erythrocyte membrane "bubbles". Ultrason Sonochem 2021; 72:105429. [PMID: 33383541 PMCID: PMC7803824 DOI: 10.1016/j.ultsonch.2020.105429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 11/22/2020] [Accepted: 12/11/2020] [Indexed: 05/04/2023]
Abstract
In this communication, we report an ultrasound-assisted method, utilising human red blood cell (RBC) or erythrocyte membranes, to produce acoustically active "bubbles", intended for vasculature imaging. The resulting RBC membrane bubbles have an average size of 1.5 μm with a generally spherical morphology, altered internal aqueous compartment contents, and small gas-containing protrusions or "pockets" in between the membrane bilayer. We also found that this method produced some nanobubbles (200-400 nm diameter), due to the shedding of lipid components from the RBC membranes to compensate for the membrane structural changes. In vitro ultrasound imaging showed that RBC membrane bubbles had comparable ultrasound contrast enhancement as the standard DEFINTYTM microbubble preparation (~13% v/v) and lower concentrations of this standard contrast agent. This current technology demonstrate a new and important application of ultrasound and of RBC membranes, having inherent biocompatibility, as potential material for the development of new types of ultrasound imaging agents, without the use of additional lipid components and pre-made microbubbles.
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Affiliation(s)
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Alexis I Bishop
- School of Physics, Monash University, Clayton, VIC, 3800, Australia
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
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12
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Lu Z, Quek AJ, Meaney SP, Tabor RF, Follink B, Teo BM. Polynorepinephrine as an Efficient Antifouling-Coating Material and Its Application as a Bacterial Killing Photothermal Agent. ACS Appl Bio Mater 2020; 3:5880-5886. [DOI: 10.1021/acsabm.0c00578] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Zhenzhen Lu
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Adam J. Quek
- Department of Biochemistry and Molecular Biology, Infection and Immunity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Shane P. Meaney
- Level 2, Rupert Myers Building (South Wing), UNSW, Sydney, NSW 2052, Australia
| | - Rico F. Tabor
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Bart Follink
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
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13
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Lu Z, Douek AM, Rozario AM, Tabor RF, Kaslin J, Follink B, Teo BM. Bioinspired polynorepinephrine nanoparticles as an efficient vehicle for enhanced drug delivery. J Mater Chem B 2020; 8:961-968. [DOI: 10.1039/c9tb02375e] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Biocompatible polynorepinephrine based particles with excellent biocompatibility for efficient delivery of therapeutics to cancer cells.
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Affiliation(s)
- Zhenzhen Lu
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Alon M. Douek
- Australian Regenerative Medicine Institute
- Monash University
- Clayton
- Australia
| | | | - Rico F. Tabor
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Jan Kaslin
- Australian Regenerative Medicine Institute
- Monash University
- Clayton
- Australia
| | - Bart Follink
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Boon Mian Teo
- School of Chemistry
- Monash University
- Clayton
- Australia
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14
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Mannaris C, Yang C, Carugo D, Owen J, Lee JY, Nwokeoha S, Seth A, Teo BM. Acoustically responsive polydopamine nanodroplets: A novel theranostic agent. Ultrason Sonochem 2020; 60:104782. [PMID: 31539725 DOI: 10.1016/j.ultsonch.2019.104782] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 08/21/2019] [Accepted: 09/06/2019] [Indexed: 05/06/2023]
Abstract
Ultrasound-induced cavitation has been used as a tool of enhancing extravasation and tissue penetration of anticancer agents in tumours. Initiating cavitation in tissue however, requires high acoustic intensities that are neither safe nor easy to achieve with current clinical systems. The use of cavitation nuclei can however lower the acoustic intensities required to initiate cavitation and the resulting bio-effects in situ. Microbubbles, solid gas-trapping nanoparticles, and phase shift nanodroplets are some examples in a growing list of proposed cavitation nuclei. Besides the ability to lower the cavitation threshold, stability, long circulation times, biocompatibility and biodegradability, are some of the desirable characteristics that a clinically applicable cavitation agent should possess. In this study, we present a novel formulation of ultrasound-triggered phase transition sub-micrometer sized nanodroplets (~400 nm) stabilised with a biocompatible polymer, polydopamine (PDA). PDA offers some important benefits: (1) facile fabrication, as dopamine monomers are directly polymerised on the nanodroplets, (2) high polymer biocompatibility, and (3) ease of functionalisation with other molecules such as drugs or targeting species. We demonstrate that the acoustic intensities required to initiate inertial cavitation can all be achieved with existing clinical ultrasound systems. Cell viability and haemolysis studies show that nanodroplets are biocompatible. Our results demonstrate the great potential of PDA nanodroplets as an acoustically active nanodevice, which is highly valuable for biomedical applications including drug delivery and treatment monitoring.
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Affiliation(s)
- Christophoros Mannaris
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK.
| | - Chuanxu Yang
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China
| | - Dario Carugo
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK; Mechatronics and Bioengineering Science Research Groups, Faculty of Engineering and the Environment, University of Southampton, Southampton, UK
| | - Joshua Owen
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK
| | - Jeong Yu Lee
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK
| | - Sandra Nwokeoha
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK
| | - Anjali Seth
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK
| | - Boon Mian Teo
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK; Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China; School of Chemistry, Clayton Campus, Monash University Victoria, 3800, Australia.
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15
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Kee ALY, Teo BM. Biomedical applications of acoustically responsive phase shift nanodroplets: Current status and future directions. Ultrason Sonochem 2019; 56:37-45. [PMID: 31101274 DOI: 10.1016/j.ultsonch.2019.03.024] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 03/08/2019] [Accepted: 03/22/2019] [Indexed: 05/19/2023]
Abstract
The evolution of ultrasonic contrast agents to enhance the reflectivity of structures in the human body has consolidated ultrasound's stance as a reliable diagnostic imaging modality. A significant development within this field includes the advent of liquid nanodroplets that are capable of vaporising into gaseous microbubbles upon ultrasonic irradiation. This literature review will therefore appraise and summarise the available literature on the generation of phase-shift nanodroplets, their formulations, applications, safety issues, future developments and any implications that may inhibit their clinical implementation. The main findings of this review affirm that phase change nanodroplets do indeed demonstrate functionality in drug delivery and targeting and characterisation of tumours. Its bioeffects however, have not yet been extensively researched, prompting further exploration into how bubble size can be controlled once it has vaporised into microbubbles and the resulting complications. As such, future research should be directed towards determining the safety, longevity and suitability of phase-shift nanodroplets over contrast agents in current clinical use.
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Affiliation(s)
- Allison Loo Yong Kee
- Department of Medical Imaging and Radiation Sciences, Monash University, 10 Chancellors Walk, Clayton, Victoria 3800, Australia
| | - Boon Mian Teo
- School of Chemistry, Monash University, 19 Rainforest Walk, Clayton, Victoria 3800, Australia.
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16
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17
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Abstract
The transdermal transport of pharmaceuticals possesses various advantageous properties over conventional drug administration techniques such as oral delivery and hypodermic injections. However, the stratum corneum persists as the main barrier, which impedes percutaneous transport. The ultrasound-based transdermal delivery of therapeutics is one of the techniques that are being investigated to overcome this obstacle. This review outlines the background information pertaining to sonophoresis and then discusses the individual sections of sonophoretic research. These areas include the sonophoretic application of various drugs, dual-frequency sonophoresis, synergistic combinations of transdermal drug delivery techniques, and the use of nanosized carriers in ultrasound-based transdermal delivery. The various challenges associated with sonophoretic drug delivery and trends of future research are also highlighted.
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Affiliation(s)
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia,
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18
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Yang C, Ogaki R, Hansen L, Kjems J, Teo BM. Theranostic carbon dots derived from garlic with efficient anti-oxidative effects towards macrophages. RSC Adv 2015. [DOI: 10.1039/c5ra16874k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Luminescent garlic carbon dots with superior photostability are synthesizedviamicrowave assisted heating.
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Affiliation(s)
- Chuanxu Yang
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Denmark
| | - Ryosuke Ogaki
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Denmark
| | - Line Hansen
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Denmark
| | - Jørgen Kjems
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Denmark
| | - Boon Mian Teo
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Denmark
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19
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Okitsu K, Teo BM, Ashokkumar M, Grieser F. Controlled Growth of Sonochemically Synthesized Gold Seed Particles in Aqueous Solutions Containing Surfactants. Aust J Chem 2005. [DOI: 10.1071/ch05115] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Gold seed particles stabilized by citric acid were prepared by the sonochemical reduction of Au(iii) ions in aqueous solutions. These seed particles were grown by the reduction of adsorbed Au(iii) ions by ascorbic acid in aqueous solutions containing cationic surfactants, dodecyltrimethylammonium bromide (C12TAB), hexadecyltrimethylammonium bromide (C16TAB) and didodecyldimethylammonium bromide (DDDAB). The rate of reduction of Au(iii) ions during the seed-growth process was found to be strongly dependent upon the type and concentration of the cationic surfactants. The presence of Ag(i) in the growth solution containing DDDAB affected the size distribution of the gold particles.
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