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Tan S, Wang Y, Wei X, Xiao X, Gao L. Microneedle-mediated drug delivery for neurological diseases. Int J Pharm 2024; 661:124400. [PMID: 38950662 DOI: 10.1016/j.ijpharm.2024.124400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 06/23/2024] [Accepted: 06/26/2024] [Indexed: 07/03/2024]
Abstract
Neurological disorders, including brain injury, brain tumors, and neurodegenerative diseases, rank as the second leading cause of death worldwide. Exploring effective new treatments for neurological disorders has long been a hot research issue in clinical practice. Recently, microneedles (MNs) have attracted much attention due to their designation as a "painless and non-invasive" novel transdermal delivery method, characterized by their biocompatibility and sustainability. The advantages of MNs open an avenue for potential therapeutic interventions targeting neurological disorders. This review presents a concise overview of progress in the field of MNs, with highlights on the application in the treatment of neurological disorders. Notably, trends in the development of MNs and future challenges are also discussed.
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Affiliation(s)
- Shuna Tan
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, PR China.
| | - Yitian Wang
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, PR China.
| | - Xuan Wei
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, PR China.
| | - Xiao Xiao
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China.
| | - Linbo Gao
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, PR China.
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2
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Mehta JN, Morales BE, Rossmeisl JH, Debinski W, Rylander CG. Solid Fiber Inside of Capillary and Modified Fusion-Spliced Fiber Optic Microneedle Devices for Improved Light Transmission Efficiency. J Med Device 2022; 16:041014. [PMID: 36353365 PMCID: PMC9632479 DOI: 10.1115/1.4055607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 09/01/2022] [Indexed: 11/08/2022] Open
Abstract
Convection-enhanced delivery (CED) is a drug delivery technique used to deliver therapeutics directly to the brain and is a continually evolving technique to treat glioblastoma. Early versions of CED have proven to result in inadequate drug volume dispersed (Vd), increasing the likelihood of tumor recurrence. Fiber optic microneedle devices (FMDs) with the ability to deliver fluid and thermal energy simultaneously have shown an ability to increase Vd, but FMDs have historically had low light transmission efficiency. In this study, we present a new fabrication method, solid fiber inside capillary (SFIC) FMD, and a modified fusion splicing (FS) method with the goal of increasing light delivery efficiency. The modified FS FMD resulted in an increase in light transmission efficiency between 49% and 173% compared to previous prototypes. However, the FS FMD resulted in significantly lower transmission efficiencies compared to the SFIC FMD (p ≤ 0.04) and FS FMDs perform much worse when light-absorptive materials, like black dye, are placed in the bore. The light absorption of a candidate cytotoxic agent, QUAD-CTX, appear to be similar to water, and light delivery through FS FMDs filled with QUAD-CTX achieves a transmission efficiency of 85.6 ± 5.4%. The fabrication process of the SFIC FMDs results in extremely fragile FMDs. Therefore, the use of a modified FS FMD fabrication process appears to be better suited for balancing the desire to increase light transmission efficiency while retaining a sturdy FMD construction.
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Affiliation(s)
- Jason N. Mehta
- Department of Mechanical Engineering, University of Texas at Austin, 204 E. Dean Keeton Street, Stop C2200, Austin, TX 78712-1591
| | - Brianna E. Morales
- Department of Biomedical Engineering, University of Texas at Austin, 301 E. Dean Keeton Street, C2100, Austin, TX 78712-2100
| | - John H. Rossmeisl
- Department of Small Animal Clinical Sciences, VA-MD College of Veterinary Medicine, Virginia Tech 205 Duckpond Drive, Blacksburg, VA 24061
| | - Waldemar Debinski
- Wake Forest Baptist Medical Center Comprehensive Cancer Center, 1 Medical Center Boulevard, Winston-Salem, NC 27157
| | - Christopher G. Rylander
- Department of Mechanical Engineering, University of Texas at Austin, 204 E. Dean Keeton Street, Stop C2200, Austin, TX 78712-1591
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3
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Partridge B, Eardley A, Morales BE, Campelo SN, Lorenzo MF, Mehta JN, Kani Y, Mora JKG, Campbell EOY, Arena CB, Platt S, Mintz A, Shinn RL, Rylander CG, Debinski W, Davalos RV, Rossmeisl JH. Advancements in drug delivery methods for the treatment of brain disease. Front Vet Sci 2022; 9:1039745. [PMID: 36330152 PMCID: PMC9623817 DOI: 10.3389/fvets.2022.1039745] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 09/26/2022] [Indexed: 11/15/2022] Open
Abstract
The blood-brain barrier (BBB) presents a formidable obstacle to the effective delivery of systemically administered pharmacological agents to the brain, with ~5% of candidate drugs capable of effectively penetrating the BBB. A variety of biomaterials and therapeutic delivery devices have recently been developed that facilitate drug delivery to the brain. These technologies have addressed many of the limitations imposed by the BBB by: (1) designing or modifying the physiochemical properties of therapeutic compounds to allow for transport across the BBB; (2) bypassing the BBB by administration of drugs via alternative routes; and (3) transiently disrupting the BBB (BBBD) using biophysical therapies. Here we specifically review colloidal drug carrier delivery systems, intranasal, intrathecal, and direct interstitial drug delivery methods, focused ultrasound BBBD, and pulsed electrical field induced BBBD, as well as the key features of BBB structure and function that are the mechanistic targets of these approaches. Each of these drug delivery technologies are illustrated in the context of their potential clinical applications and limitations in companion animals with naturally occurring intracranial diseases.
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Affiliation(s)
- Brittanie Partridge
- Veterinary and Comparative Neuro-Oncology Laboratory, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Allison Eardley
- Veterinary and Comparative Neuro-Oncology Laboratory, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Brianna E. Morales
- Walker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, United States
| | - Sabrina N. Campelo
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, United States
| | - Melvin F. Lorenzo
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, United States
| | - Jason N. Mehta
- Walker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, United States
| | - Yukitaka Kani
- Veterinary and Comparative Neuro-Oncology Laboratory, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Josefa K. Garcia Mora
- Veterinary and Comparative Neuro-Oncology Laboratory, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Etse-Oghena Y. Campbell
- Walker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, United States
| | - Christopher B. Arena
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, United States
| | - Simon Platt
- Department of Small Animal Medicine and Surgery, University of Georgia, Athens, GA, United States
| | - Akiva Mintz
- Department of Radiology, Columbia University Medical Center, New York, NY, United States
| | - Richard L. Shinn
- Veterinary and Comparative Neuro-Oncology Laboratory, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Christopher G. Rylander
- Walker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, United States
| | - Waldemar Debinski
- Department of Cancer Biology, Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC, United States
| | - Rafael V. Davalos
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, United States
| | - John H. Rossmeisl
- Veterinary and Comparative Neuro-Oncology Laboratory, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
- Department of Cancer Biology, Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC, United States
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Kani Y, Hinckley J, Robertson JL, Mehta JM, Rylander CG, Rossmeisl JH. Biocompatibility of the fiberoptic microneedle device chronically implanted in the rat brain. Res Vet Sci 2022; 143:74-80. [PMID: 34995824 PMCID: PMC8858887 DOI: 10.1016/j.rvsc.2021.12.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/28/2021] [Indexed: 11/15/2022]
Abstract
The fiberoptic microneedle device (FMD) is a fused-silica microcatheter capable of co-delivery of fluids and light that has been developed for convection-enhanced delivery and photothermal treatments of glioblastoma. Here we investigate the biocompatibility of FMD fragments chronically implanted in the rat brain in the context of evaluating potential mechanical device failure. Fischer rats underwent craniectomy procedures for sham control (n = 16) or FMD implantation (n = 16) within the brain. Rats were examined daily after implantation, and at 14, 30, 90, and 180 days after implantation were evaluated via computed tomography of the head, hematologic and blood biochemical profiling, and necropsy examinations. Clinical signs of illness and distant implant migration were not observed, and blood analyses were not different between control and FMD implanted groups at any time. Mild inflammatory and astrogliotic reactions localized to the treatment sites within the brain were observed in all groups, more robust in FMD implanted groups compared to controls at days 30 and 90, and decreased in severity over days 90-180 of the study. One rat developed a chronic, superficial surgical site pyogranuloma attributed to the FMD silica implant. Chronically implanted FMD fragments were well tolerated clinically and resulted in anticipated mild, localized brain tissue responses that were comparable with other implanted biomaterials in the brain.
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Affiliation(s)
- Yukitaka Kani
- Veterinary and Comparative Neurooncology Laboratory and Animal Cancer Care and Research Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Jonathan Hinckley
- Veterinary and Comparative Neurooncology Laboratory and Animal Cancer Care and Research Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - John L. Robertson
- Veterinary and Comparative Neurooncology Laboratory and Animal Cancer Care and Research Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Jason M. Mehta
- Department of Mechanical Engineering, University of Texas at Austin, Austin TX, USA
| | | | - John H. Rossmeisl
- Veterinary and Comparative Neurooncology Laboratory and Animal Cancer Care and Research Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA,Corresponding author at.: 205 Duckpond Drive, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacskburg, VA 24061,
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5
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Akhter F, Manrique-Bedoya S, Moreau C, Smith AL, Feng Y, Mayer KM, Hood RL. Characterization of thermal and optical properties in porcine pancreas tissue. Lasers Surg Med 2022; 54:702-715. [PMID: 35170764 DOI: 10.1002/lsm.23523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 01/12/2022] [Accepted: 01/21/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND Photothermal therapies have shown promise for treating pancreatic ductal adenocarcinoma when they can be applied selectively, but off-target heating can frustrate treatment outcomes. Improved strategies leveraging selective binding and localized heating are possible with precision medical approaches such as functionalized gold nanoparticles, but careful control of optical dosage and thermal generation would be imperative. However, the literature review revealed many groups assume liver properties for pancreas tissue or rely on insufficiently rigorous characterization studies. OBJECTIVE The objective of this study was to determine the thermal conductivity and optical properties at 808/1064 nm wavelengths in healthy samples of fresh and frozen porcine pancreas ex vivo. METHODS Thermal conductivity of the porcine pancreas tissue was measured by utilizing a hot plate and two K-type thermocouples. Experimental variables such as tissue sample thickness, hot plate temperature, and heat convection coefficient were estimated through the control experiments utilizing specimens with known thermal conductivity. Optical evaluations assessed light attenuation at the 808 and 1064 nm wavelengths (continuous wave, collimated beam) by measuring the light transmittance and reflectance of different tissue thicknesses. In turn, these measurements were input into an inverse adding-doubling program to estimate the optical absorption and reduced scattering coefficients. RESULTS Interestingly, pancreas tissue thermal conductivity was demonstrated to have no significant difference (p > 0.5) between samples that were fresh, frozen for 7 days, or frozen for 14 days. Conversely, optical property assessment exhibited a significant difference (p < 0.001) between fresh and frozen tissue samples, with increased absorbance and reflectance within the frozen group. However, the optical attenuation values measured were substantially less than that of the liver or reported in previous pancreas studies, suggesting a wide overestimation of these properties. CONCLUSIONS These thermal and optical properties are critical to the development of novel therapeutic strategies like plasmonic photothermal therapy, but perhaps more importantly, are invaluable towards informing better surgical planning and operative technique among the existing thermal approaches for treating pancreas tissue.
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Affiliation(s)
- Forhad Akhter
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Santiago Manrique-Bedoya
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Chris Moreau
- Gastroenterology and Transplant, UT Health San Antonio, San Antonio, Texas, USA
| | - Andrea Lynn Smith
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Yusheng Feng
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Kathryn M Mayer
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas, USA
| | - R Lyle Hood
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA.,Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, Texas, USA
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6
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Akhter F, Manrique-Bedoya S, Moreau C, Smith AL, Feng Y, Mayer KM, Hood RL. Assessment and Modeling of Plasmonic Photothermal Therapy Delivered via a Fiberoptic Microneedle Device Ex Vivo. Pharmaceutics 2021; 13:2133. [PMID: 34959414 PMCID: PMC8703536 DOI: 10.3390/pharmaceutics13122133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/29/2021] [Accepted: 12/07/2021] [Indexed: 12/23/2022] Open
Abstract
Plasmonic photothermal therapy (PPTT) has potential as a superior treatment method for pancreatic cancer, a disease with high mortality partially attributable to the currently non-selective treatment options. PPTT utilizes gold nanoparticles infused into a targeted tissue volume and exposed to a specific light wavelength to induce selective hyperthermia. The current study focuses on developing this approach within an ex vivo porcine pancreas model via an innovative fiberoptic microneedle device (FMD) for co-delivering light and gold nanoparticles. The effects of laser wavelengths (808 vs. 1064 nm), irradiances (20-50 mW·mm-2), and gold nanorod (GNR) concentrations (0.1-3 nM) on tissue temperature profiles were evaluated to assess and control hyperthermic generation. The GNRs had a peak absorbance at ~800 nm. Results showed that, at 808 nm, photon absorption and subsequent heat generation within tissue without GNRs was 65% less than 1064 nm. The combination of GNRs and 808 nm resulted in a 200% higher temperature rise than the 1064 nm under similar conditions. A computational model was developed to predict the temperature shift and was validated against experimental results with a deviation of <5%. These results show promise for both a predictive model and spatially selective, tunable treatment modality for pancreatic cancer.
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Affiliation(s)
- Forhad Akhter
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Santiago Manrique-Bedoya
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Chris Moreau
- Gastroenterology and Transplant, UT Health San Antonio, San Antonio, TX 78229, USA;
| | - Andrea Lynn Smith
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Yusheng Feng
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Kathryn M. Mayer
- Department of Physics & Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, USA;
| | - R. Lyle Hood
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
- Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, TX 78229, USA
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7
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Semiconductor core fibres: materials science in a bottle. Nat Commun 2021; 12:3990. [PMID: 34183645 PMCID: PMC8239017 DOI: 10.1038/s41467-021-24135-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 06/02/2021] [Indexed: 11/29/2022] Open
Abstract
Novel core fibers have a wide range of applications in optics, as sources, detectors and nonlinear response media. Optoelectronic, and even electronic device applications are now possible, due to the introduction of methods for drawing fibres with a semiconductor core. This review examines progress in the development of glass-clad, crystalline core fibres, with an emphasis on semiconducting cores. The underlying materials science and the importance of post-processing techniques for recrystallization and purification are examined, with achievements and future prospects tied to the phase diagrams of the core materials. The application space for optical fibers is growing, enabled by fibers built using special materials and processes. In this Review, the authors discuss the materials science behind producing crystalline core fibers for diverse applications and progress in the field.
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Zaltieri M, Massaroni C, Cauti FM, Schena E. Techniques for Temperature Monitoring of Myocardial Tissue Undergoing Radiofrequency Ablation Treatments: An Overview. SENSORS (BASEL, SWITZERLAND) 2021; 21:1453. [PMID: 33669692 PMCID: PMC7922285 DOI: 10.3390/s21041453] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/12/2021] [Accepted: 02/16/2021] [Indexed: 12/18/2022]
Abstract
Cardiac radiofrequency ablation (RFA) has received substantial attention for the treatment of multiple arrhythmias. In this scenario, there is an ever-growing demand for monitoring the temperature trend inside the tissue as it may allow an accurate control of the treatment effects, with a consequent improvement of the clinical outcomes. There are many methods for monitoring temperature in tissues undergoing RFA, which can be divided into invasive and non-invasive. This paper aims to provide an overview of the currently available techniques for temperature detection in this clinical scenario. Firstly, we describe the heat generation during RFA, then we report the principle of work of the most popular thermometric techniques and their features. Finally, we introduce their main applications in the field of cardiac RFA to explore the applicability in clinical settings of each method.
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Affiliation(s)
- Martina Zaltieri
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.)
| | - Carlo Massaroni
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.)
| | - Filippo Maria Cauti
- Arrhythmology Unit, Cardiology Division, S. Giovanni Calibita Hospital, Isola Tiberina, 00186 Rome, Italy;
| | - Emiliano Schena
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.)
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Akhter F, Bascos GNW, Canelas M, Griffin B, Hood RL. Mechanical characterization of a fiberoptic microneedle device for controlled delivery of fluids and photothermal excitation. J Mech Behav Biomed Mater 2020; 112:104042. [PMID: 32927279 DOI: 10.1016/j.jmbbm.2020.104042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/17/2020] [Accepted: 08/14/2020] [Indexed: 01/18/2023]
Abstract
Current clinical approaches for treating pancreatic cancer have been demonstrated as ineffective at improving midterm survival. A primary obstacle to local drug delivery is the desmoplastic nature of the peritumoral environment, which acts as a significant barrier to circulating macromolecules. To address this need, our group presents a sharp fiberoptic microcatheter capable of accessing the pancreas through transduodenal endoscope and penetrating a tumor to locally co-deliver photothermal and fluid-based therapies. Experiments sought to characterize the mechanical penetration capabilities and fluid mechanics of the fiberoptic microneedle design. A refined off-center fusion splicing technique was developed for joining a multimode fiber to the annular core of a light-guiding capillary, allowing light transmission with minimal optical loss. A novel and frugal technique for assessing the penetration force of the microneedle was conducted in a bovine gelatin tissue phantom with a Young's modulus stiffer than the high range for pancratic tissue or tumor. Buckling forces for different microneedle lengths were measured and compared against theoretical values obtained from Euler's Critical Load equation under fixed-pinned column conditions. Hydraulic resistance of different capillary lengths was evaluated and compared against the theoretical values from Hagen-Poiseuille's law, allowing assessment of contributions from different segments of the device. The results demonstrated that the microcatheter can robustly and repeatably penetrate a soft tissue phantom chosen to be a conservative model of pancreatic tissue for penetration properties. Experiments showed that a 1.5 N insertion force was required for phantom penetration with a 45° beveled needle at a 5 mm unsupported length, while the critical buckling load was measured to be approximately 4 N. In addition, the design was demonstrated to efficiently transport 1064 nm light and aqueous fluids with a 70-75% light coupling efficiency and 12,200 Pa.s/μl hydraulic resistance, respectively. These findings motivate the FMD's further development as a treatment platform for pancreatic cancer.
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Affiliation(s)
- Forhad Akhter
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - Gregg Neal W Bascos
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - Max Canelas
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - Bradley Griffin
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - R Lyle Hood
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX, USA; Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, TX, USA.
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10
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Ultrathin glass fiber microprobe for electroporation of arbitrary selected cell groups. Bioelectrochemistry 2020; 135:107545. [PMID: 32446151 DOI: 10.1016/j.bioelechem.2020.107545] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 04/22/2020] [Accepted: 04/29/2020] [Indexed: 12/21/2022]
Abstract
A new type of ultrathin fiber microprobe for selective electroporation is reported. The microprobe is 10 cm long and has a diameter of 350 µm. This microprobe is a low cost tool, which allows electroporation of an arbitrary selected single cell or groups of cells among population with use of a standard microscope and cell culture plates. The microprobe in its basic form contains two metal microelectrodes made of a silver-copper alloy, running along the fiber, each with a diameter of 23 µm. The probe was tested in vitro on a population of normal and cancer cells. Successful targeted electroporation was observed by means of accumulation of trypan blue (TB) dye marker in the cell. The electroporation phenomenon was also verified with propidium iodide and AnnexinV in fluorescent microscopy.
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11
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Dolganova IN, Shikunova IA, Katyba GM, Zotov AK, Mukhina EE, Shchedrina MA, Tuchin VV, Zaytsev KI, Kurlov VN. Optimization of sapphire capillary needles for interstitial and percutaneous laser medicine. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-7. [PMID: 31849206 PMCID: PMC7006039 DOI: 10.1117/1.jbo.24.12.128001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
Sapphire capillary needles fabricated by edge-defined film-fed growth (EFG) technique hold strong potential in laser thermotherapy and photodynamic therapy, thanks to the advanced physical properties of sapphire. These needles feature an as-grown optical quality, their length is tens of centimeters, and they contain internal capillary channels, with open or closed ends. They can serve as optically transparent bearing elements with optical fibers introduced into their capillary channels in order to deliver laser radiation to biological tissues for therapeutic and, in some cases, diagnostic purposes. A potential advantage of the EFG-grown sapphire needles is associated with an ability to form the tip of a needle with complex geometry, either as-grown or mechanically treated, aimed at controlling the output radiation pattern. In order to examine a potential of the radiation pattern shaping, we present a set of fabricated sapphire needles with different tips. We studied the radiation patterns formed at the output of these needles using a He-Ne laser as a light source, and used intralipid-based tissue phantoms to proof the concept experimentally and the Monte-Carlo modeling to proof it numerically. The observed results demonstrate a good agreement between the numerical and experimental data and reveal an ability to control within wide limits the direction of tissue exposure to light and the amount of exposed tissue by managing the sapphire needle tip geometry.
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Affiliation(s)
- Irina N. Dolganova
- Russian Academy of Sciences, Institute of Solid State Physics, Chernogolovka, Russia
- Sechenov First Moscow State Medical University, Institute for Regenerative Medicine, Moscow, Russia
- Bauman Moscow State Technical University, Moscow, Russia
| | - Irina A. Shikunova
- Russian Academy of Sciences, Institute of Solid State Physics, Chernogolovka, Russia
| | - Gleb M. Katyba
- Russian Academy of Sciences, Institute of Solid State Physics, Chernogolovka, Russia
- Bauman Moscow State Technical University, Moscow, Russia
| | - Arsen K. Zotov
- Russian Academy of Sciences, Institute of Solid State Physics, Chernogolovka, Russia
| | | | - Marina A. Shchedrina
- Sechenov First Moscow State Medical University, Institute for Regenerative Medicine, Moscow, Russia
| | - Valery V. Tuchin
- Saratov State University, Saratov, Russia
- Russian Academy of Sciences, Institute of Precision Mechanics and Control, Saratov, Russia
- Tomsk State University, Tomsk, Russia
- ITMO University, St. Petersburg, Russia
| | - Kirill I. Zaytsev
- Sechenov First Moscow State Medical University, Institute for Regenerative Medicine, Moscow, Russia
- Bauman Moscow State Technical University, Moscow, Russia
- Russian Academy of Sciences, Prokhorov General Physics Institute, Moscow, Russia
| | - Vladimir N. Kurlov
- Russian Academy of Sciences, Institute of Solid State Physics, Chernogolovka, Russia
- Sechenov First Moscow State Medical University, Institute for Regenerative Medicine, Moscow, Russia
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Han Z, Lv L, Ma Y, Wang Z, Liu Y, Zhang M, Li S, Gu Y. Cypate-mediated thermosensitive nanoliposome for tumor imaging and photothermal triggered drug release. JOURNAL OF BIOPHOTONICS 2017; 10:1607-1616. [PMID: 28106955 DOI: 10.1002/jbio.201600270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/05/2016] [Accepted: 12/12/2016] [Indexed: 06/06/2023]
Abstract
It is an emerging focus to explore controlled release drug delivery systems for simultaneous cancer imaging and therapy. Herein, we synthesized a photothermal sensitive multifunctional nano-liposome drug delivery system, with doxorubicin wrapped in the hydropholic layer as the therapeutical agent and cypate doped in the hydrophobic layer as the diagnostic agent. A series of in vitro and in vivo characterization demonstrated the stability of synthesized liposome, as the DL% was 9 ± 1.5 and the EE% was 82.7 ± 2.1. And the liposome achieved the functions of target-delivery, enhanced photochemical internalized drug release, and simultaneous chemotherapy and thermal therapy, indicating that this multifunctional nano-liposome is a promising drug delivery system for tumor diagnosis and targeting therapy.
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Affiliation(s)
- Zhihao Han
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
| | - Liwei Lv
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
| | - Yi Ma
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
| | - Zhaohui Wang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
| | - Yuxi Liu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
| | - Min Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
| | - Siwen Li
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
| | - Yueqing Gu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, No. 24 Tongjia Lane, Gulou District, Nanjing, 210009, China
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13
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Rocha U, Hu J, Rodríguez EM, Vanetsev AS, Rähn M, Sammelselg V, Orlovskii YV, Solé JG, Jaque D, Ortgies DH. Subtissue Imaging and Thermal Monitoring of Gold Nanorods through Joined Encapsulation with Nd-Doped Infrared-Emitting Nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:5394-5400. [PMID: 27552716 DOI: 10.1002/smll.201600866] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/18/2016] [Indexed: 06/06/2023]
Abstract
Encapsulation of gold nanorods together with Nd-doped fluorescent nanoparticles in a biocompatible polymer creates multifunctional nanostructures, whose infrared fluorescence allows their subcutaneous localization in biological tissues while also adding the ability to measure the temperature from the emitted light in order to better monitor the light-to-heat conversion of the gold nanorods during photothermal therapy.
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Affiliation(s)
- Uéslen Rocha
- Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, 28049, Spain
| | - Jie Hu
- Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, 28049, Spain
| | - Emma Martín Rodríguez
- Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km. 9.100, Madrid, 28034, Spain
| | - Alexander S Vanetsev
- Institute of Physics, University of Tartu, W. Ostwaldi str. 1, Tartu, 50411, Estonia
- A. M. Prokhorov General Physics Institute, Vavilova str. 38, Moscow, 19991, Russia
| | - Mikhel Rähn
- Institute of Physics, University of Tartu, W. Ostwaldi str. 1, Tartu, 50411, Estonia
| | - Väino Sammelselg
- Institute of Physics, University of Tartu, W. Ostwaldi str. 1, Tartu, 50411, Estonia
| | - Yurii V Orlovskii
- Institute of Physics, University of Tartu, W. Ostwaldi str. 1, Tartu, 50411, Estonia
- A. M. Prokhorov General Physics Institute, Vavilova str. 38, Moscow, 19991, Russia
| | - José García Solé
- Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, 28049, Spain
| | - Daniel Jaque
- Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km. 9.100, Madrid, 28034, Spain
| | - Dirk H Ortgies
- Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, 28049, Spain.
- Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km. 9.100, Madrid, 28034, Spain.
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Rossmeisl JH. New treatment modalities for brain tumors in dogs and cats. Vet Clin North Am Small Anim Pract 2014; 44:1013-38. [PMID: 25441624 DOI: 10.1016/j.cvsm.2014.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Despite advancements in standard therapies, intracranial tumors remain a significant source of morbidity and mortality in veterinary and human medicine. Several newer approaches are gaining more widespread acceptance or are currently being prepared for translation from experimental to routine therapeutic use. Clinical trials in dogs with spontaneous brain tumors have contributed to the development and human translation of several novel therapeutic brain tumor approaches.
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Affiliation(s)
- John H Rossmeisl
- Neurology and Neurosurgery, Department of Small Animal Clinical Sciences, VA-MD Regional College of Veterinary Medicine, Virginia Tech, 215 Duckpond Drive, Mail Code 0442, Blacksburg, VA 24061, USA.
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Hood RL, Andriani RT, Emch S, Robertson JL, Rylander CG, Rossmeisl JH. Fiberoptic microneedle device facilitates volumetric infusate dispersion during convection-enhanced delivery in the brain. Lasers Surg Med 2013; 45:418-26. [PMID: 23861185 DOI: 10.1002/lsm.22156] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2013] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND OBJECTIVES A fiberoptic microneedle device (FMD) was designed and fabricated for the purpose of enhancing the volumetric dispersal of macromolecules delivered to the brain through convection-enhanced delivery (CED) by concurrent delivery of sub-lethal photothermal hyperthermia. This study's objective was to demonstrate enhanced dispersal of fluid tracer molecules through co-delivery of 1,064 nm laser energy in an in vivo rodent model. MATERIALS AND METHODS FMDs capable of co-delivering fluids and laser energy through a single light-guiding capillary tube were fabricated. FMDs were stereotactically inserted symmetrically into both cerebral hemispheres of 16 anesthetized rats to a depth of 1.5 mm. Laser irradiation (1,064 nm) at 0 (control), 100, and 200 mW was administered concurrently with CED infusions of liposomal rhodamine (LR) or gadolinium-Evans blue-serum albumin conjugated complex (Gd-EBA) at a flow rate of 0.1 µl/min for 1 hour. Line pressures were monitored during the infusions. Rodents were sacrificed immediately following infusion and their brains were harvested, frozen, and serially cryosectioned for histopathologic and volumetric analyses. RESULTS Analysis by ANOVA methods demonstrated that co-delivery enhanced volumetric dispersal significantly, with measured volumes of 15.8 ± 0.6 mm(3) for 100 mW compared to 10.0 ± 0.4 mm(3) for its fluid only control and 18.0 ± 0.3 mm(3) for 200 mW compared to 10.3 ± 0.7 mm(3) for its fluid only control. Brains treated with 200 mW co-delivery exhibited thermal lesions, while 100 mW co-deliveries were associated with preservation of brain cytoarchitecture. CONCLUSION Both lethal and sub-lethal photothermal hyperthermia substantially increase the rate of volumetric dispersal in a 1 hour CED infusion. This suggests that the FMD co-delivery method could reduce infusion times and the number of catheter insertions into the brain during CED procedures.
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Affiliation(s)
- R Lyle Hood
- School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia, 24061
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