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Casadei L, Choudhury A, Sarchet P, Mohana Sundaram P, Lopez G, Braggio D, Balakirsky G, Pollock R, Prakash S. Cross-flow microfiltration for isolation, selective capture and release of liposarcoma extracellular vesicles. J Extracell Vesicles 2021; 10:e12062. [PMID: 33643547 PMCID: PMC7887429 DOI: 10.1002/jev2.12062] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 12/20/2020] [Accepted: 01/12/2021] [Indexed: 12/23/2022] Open
Abstract
We present a resource‐efficient approach to fabricate and operate a micro‐nanofluidic device that uses cross‐flow filtration to isolate and capture liposarcoma derived extracellular vesicles (EVs). The isolated extracellular vesicles were captured using EV‐specific protein markers to obtain vesicle enriched media, which was then eluted for further analysis. Therefore, the micro‐nanofluidic device integrates the unit operations of size‐based separation with CD63 antibody immunoaffinity‐based capture of extracellular vesicles in the same device to evaluate EV‐cargo content for liposarcoma. The eluted media collected showed ∼76% extracellular vesicle recovery from the liposarcoma cell conditioned media and ∼32% extracellular vesicle recovery from dedifferentiated liposarcoma patient serum when compared against state‐of‐art extracellular vesicle isolation and subsequent quantification by ultracentrifugation. The results reported here also show a five‐fold increase in amount of critical liposarcoma‐relevant extracellular vesicle cargo obtained in 30 min presenting a significant advance over existing state‐of‐art.
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Affiliation(s)
- Lucia Casadei
- Comprehensive Cancer Center The Ohio State University Columbus Ohio USA
| | - Adarsh Choudhury
- Department of Mechanical and Aerospace Engineering The Ohio State University Columbus Ohio USA
| | - Patricia Sarchet
- Comprehensive Cancer Center The Ohio State University Columbus Ohio USA
| | | | - Gonzalo Lopez
- Comprehensive Cancer Center The Ohio State University Columbus Ohio USA
| | - Danielle Braggio
- Comprehensive Cancer Center The Ohio State University Columbus Ohio USA
| | - Gita Balakirsky
- Comprehensive Cancer Center The Ohio State University Columbus Ohio USA
| | - Raphael Pollock
- Department of Mechanical and Aerospace Engineering The Ohio State University Columbus Ohio USA
| | - Shaurya Prakash
- Comprehensive Cancer Center The Ohio State University Columbus Ohio USA.,Department of Mechanical and Aerospace Engineering The Ohio State University Columbus Ohio USA
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Mohana Sundaram P, Rangharajan KK, Akbari E, Hadick TJ, Song JW, Prakash S. Direct current electric field regulates endothelial permeability under physiologically relevant fluid forces in a microfluidic vessel bifurcation model. Lab Chip 2021; 21:319-330. [PMID: 33319218 PMCID: PMC7855772 DOI: 10.1039/d0lc00507j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Previous in vitro studies have reported on the use of direct current electric fields (DC-EFs) to regulate vascular endothelial permeability, which is important for tissue regeneration and wound healing. However, these studies have primarily used static 2D culture models that lack the fluid mechanical forces associated with blood flow experienced by endothelial cells (ECs) in vivo. Hence, the effect of DC-EF on ECs under physiologically relevant fluid forces is yet to be systematically evaluated. Using a 3D microfluidic model of a bifurcating vessel, we report the role of DC-EF on regulating endothelial permeability when co-applied with physiologically relevant fluid forces that arise at the vessel bifurcation. The application of a 70 V m-1 DC-EF simultaneously with 1 μL min-1 low perfusion rate (generating 3.8 dyn cm-2 stagnation pressure at the bifurcation point and 0.3 dyn cm-2 laminar shear stress in the branched vessel) increased the endothelial permeability 7-fold compared to the static control condition (i.e., without flow and DC-EF). When the perfusion rate was increased to 10 μL min-1 (generating 38 dyn cm-2 stagnation pressure at the bifurcation point and 3 dyn cm-2 laminar shear stress in the branched vessel) while maintaining the same electrical stimulation, a 4-fold increase in endothelial permeability compared to the static control was observed. The lower increase in endothelial permeability for the higher fluid forces but the same DC-EF suggests a competing role between fluid forces and the applied DC-EF. Moreover, the observed increase in endothelial permeability due to combined DC-EF and flow was transient and dependent on the Akt signalling pathway. Collectively, these findings provide significant new insights into how the endothelium serves as an electro-mechanical interface for regulating vessel permeability.
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Heald R, Bennett M, Subramaniam VV, Dusane D, Lochab V, Sundaram PM, Salyer S, West J, Stoodley P, Prakash S. Printed Electroceutical Dressings for the Inhibition of Biofilms and Treatment of Chronic Wounds. J Microelectromech Syst 2020; 29:918-923. [PMID: 33519170 PMCID: PMC7839981 DOI: 10.1109/jmems.2020.2999260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We report on an innovative, fabric-based conformable, and easily fabricated electroceutical wound dressing that inhibits bacterial biofilm infections and shows significant promise for healing chronic wounds. Cyclic voltammetry demonstrates the ability of the electroceutical to produce reactive oxygen species, primarily HOCl that is responsible for bacterial inhibition. In vitro investigation with the lawn biofilm grown on a soft tissue mimic assay shows the efficacy of the dressing against both gram-positive and gram-negative bacteria in the biofilm form. In vivo, the printed electroceutical dressing was utilized as an intervention treatment for a canine subject with a non-healing wound due to a year-long persistent polymicrobial infection. The clinical case study with the canine subject exhibited the applicability in a clinical setting with the results showing infection inhibition within 11 days of initial treatment. This printed electroceutical dressing was integrated with a Bluetooth® enabled circuit allowing remote monitoring of the current flow within the wound bed. The potential to monitor wounds remotely in real-time with a Bluetooth® enabled circuit proposes a new physical biomarker for management of infected, chronic wounds.
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Affiliation(s)
- Rachel Heald
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Molly Bennett
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Vish V. Subramaniam
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Devendra Dusane
- Devendra Dusane was previously with the Department of Microbial Infection and Immunity, The Ohio State University and is now at the Nationwide Children’s Hospital, Columbus, OH, USA
| | - Varun Lochab
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Prashanth Mohana Sundaram
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Sarah Salyer
- Sarah Salyer is with the Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
| | - J.D. West
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Paul Stoodley
- Paul Stoodley is with the Department of Microbial Infection and Immunity and the Department of Orthopedics, The Ohio State University, Columbus, OH, USA. He is also affiliated with the National Centre for Advanced Tribiology at Southampton and the National Biofilm Innovation Centre, Dept. Mechanical Engineering, University of Southampton, UK
| | - Shaurya Prakash
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
- Shaurya Prakash () are all with the Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, USA
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Sundaram PM, Casadei L, Lopez G, Braggio D, Balakirsky G, Pollock R, Prakash S. Multi-Layer Micro-Nanofluidic Device for Isolation and Capture of Extracellular Vesicles Derived from Liposarcoma Cell Conditioned Media. J Microelectromech Syst 2020; 29:776-782. [PMID: 33519169 PMCID: PMC7839931 DOI: 10.1109/jmems.2020.3006786] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We report on isolation, capture, and subsequent elution for analysis of extracellular vesicles derived from human liposarcoma cell conditioned media, using a multi-layer micro-nanofluidic device operated with tangential flow separation. Our device integrates size-based separation followed by immunoaffinity-based capture of extracellular vesicles in the same device. For liposarcomas, this is the first report on isolating, capturing, and then eluting the extracellular vesicles using a micro-nanofluidic device. The results show a significantly higher yield of the eluted extracellular vesicles (~84%) compared to the current methods of ultracentrifugation (~6%) and ExoQuick-based separations (~16%).
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Affiliation(s)
- Prashanth Mohana Sundaram
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210 USA
| | - Lucia Casadei
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210 USA
| | - Gonzalo Lopez
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210 USA
| | - Danielle Braggio
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210 USA
| | - Gita Balakirsky
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210 USA
| | - Raphael Pollock
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210 USA
| | - Shaurya Prakash
- Department of Mechanical and Aerospace Engineering and is also an affiliate of the Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210 USA
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Roy S, Prakash S, Mathew-Steiner SS, Das Ghatak P, Lochab V, Jones TH, Mohana Sundaram P, Gordillo GM, Subramaniam VV, Sen CK. Disposable Patterned Electroceutical Dressing (PED-10) Is Safe for Treatment of Open Clinical Chronic Wounds. Adv Wound Care (New Rochelle) 2019; 8:149-159. [PMID: 31016066 DOI: 10.1089/wound.2018.0915] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 11/26/2018] [Accepted: 03/03/2019] [Indexed: 12/26/2022] Open
Abstract
Objective: To evaluate if patterned electroceutical dressing (PED) is safe for human chronic wounds treatment as reported by wound care providers. Approach: This work reports a pilot feasibility study with the primary objective to determine physically observable effects of PED application on host tissue response from a safety evaluation point of view. For this pilot study, patients receiving a lower extremity amputation with at least one open wound on the part to be amputated were enrolled. Patients were identified through the Ohio State University Wexner Medical Center (OSUWMC) based on inclusion and exclusion criteria through prescreening through the Comprehensive Wound Center's (CWC) Limb Preservation Program and wound physicians and/or providers at OSUWMC. Wounds were treated with the PED before amputation surgery. Results: The intent of the study was to identify if PED was safe for clinical application based on visual observations of adverse or lack of adverse events on skin and wound tissue. The pilot testing performed on a small cohort (N = 8) of patients showed that with engineered voltage regulation of current flow to the open wound, the PED can be used with little to no visually observable adverse effects on chronic human skin wounds. Innovation: The PED was developed as a second-generation tunable electroceutical wound care dressing, which could potentially be used to treat wounds with deeper infections compared with current state of the art that treats wounds with treatment zone limited to the surface near topical application. Conclusion: Technology advances in design and fabrication of electroceutical dressings were leveraged to develop a tunable laboratory prototype that could be used as a disposable low-cost electroceutical wound care dressing on chronic wounds. Design revisions of PED-1 (1 kΩ ballast resistor) circumvented previously observed adverse effects on the skin in the vicinity of an open wound. PED-10 (including a 10 kΩ ballast resistor) was well tolerated in the small cohort of patients (N = 8) on whom it was tested, and the observations reported here warrant a larger study to determine the clinical impact on human wound healing and infection control.
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Affiliation(s)
- Sashwati Roy
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Shaurya Prakash
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | - Shomita S. Mathew-Steiner
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Piya Das Ghatak
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Varun Lochab
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | - Travis H. Jones
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | | | - Gayle M. Gordillo
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Vish V. Subramaniam
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | - Chandan K. Sen
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
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Rangharajan KK, Mohana Sundaram P, Conlisk AT, Prakash S. Surface dependent enhancement in water vapor permeation through nanochannels. Analyst 2018; 143:4256-4266. [PMID: 30028451 DOI: 10.1039/c8an00650d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transmission resistance for selective water vapor permeation through hydrophobic conduits with a varying degree of surface wettability is estimated inside a nanofluidic device.
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Affiliation(s)
| | | | - A. T. Conlisk
- Department of Mechanical and Aerospace Engineering
- The Ohio State University
- Columbus
- USA
| | - Shaurya Prakash
- Department of Mechanical and Aerospace Engineering
- The Ohio State University
- Columbus
- USA
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Sharma SN, Sapre GK, Kulkarni J, Alurkar VM, Ganjoo RK, Sundaram PM. Hyperbaric oxygen therapy in multiple sclerosis (review with two case reports). J Assoc Physicians India 1986; 34:221-4. [PMID: 3733657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Sundaram PM. Syncope among aircrew evaluated at the USAF School of Aerospace Medicine. Aerosp Med 1969; 40:1126-1133. [PMID: 5823420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Sundaram PM. Syncope among aircrew evaluated at the USAF School of Aerospace Medicine. Aeromed Rev 1968; 8:1-22. [PMID: 5730759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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