1
|
Hajam MI, Khan MM. Microfluidics: a concise review of the history, principles, design, applications, and future outlook. Biomater Sci 2024; 12:218-251. [PMID: 38108438 DOI: 10.1039/d3bm01463k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Microfluidic technologies have garnered significant attention due to their ability to rapidly process samples and precisely manipulate fluids in assays, making them an attractive alternative to conventional experimental methods. With the potential for revolutionary capabilities in the future, this concise review provides readers with insights into the fascinating world of microfluidics. It begins by introducing the subject's historical background, allowing readers to familiarize themselves with the basics. The review then delves into the fundamental principles, discussing the underlying phenomena at play. Additionally, it highlights the different aspects of microfluidic device design, classification, and fabrication. Furthermore, the paper explores various applications, the global market, recent advancements, and challenges in the field. Finally, the review presents a positive outlook on trends and draws lessons to support the future flourishing of microfluidic technologies.
Collapse
Affiliation(s)
- Mohammad Irfan Hajam
- Department of Mechanical Engineering, National Institute of Technology Srinagar, India.
| | - Mohammad Mohsin Khan
- Department of Mechanical Engineering, National Institute of Technology Srinagar, India.
| |
Collapse
|
2
|
Fang Z, Bi S, Brown JD, Chen J, Pan T. Microfluidics in the eye: a review of glaucoma implants from an engineering perspective. LAB ON A CHIP 2023; 23:4736-4772. [PMID: 37847237 DOI: 10.1039/d3lc00407d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Glaucoma is a progressive optic neuropathy in the eye, which is a leading cause of irreversible blindness worldwide and currently affects over 70 million individuals. Clinically, intraocular pressure (IOP) reduction is the only proven treatment to halt the progression of glaucoma. Microfluidic devices such as glaucoma drainage devices (GDDs) and minimally invasive glaucoma surgery (MIGS) devices are routinely used by ophthalmologists to manage elevated IOP, by creating an artificial pathway for the over-accumulated aqueous humor (AH) in a glaucomatous eye, when the natural pathways are severely blocked. Herein, a detailed modelling and analysis of both the natural microfluidic pathways of the AH in the eye and artificial microfluidic pathways formed additionally by the various glaucoma implants are conducted to provide an insight into the causes of the IOP abnormality and the improvement schemes of current implant designs. The mechanisms of representative glaucoma implants have been critically reviewed from the perspective of microfluidics, and we have categorized the current implants into four groups according to the targeted drainage sites of the AH, namely Schlemm's canal, suprachoroidal space, subconjunctival space, and ocular surface. In addition, we propose to divide the development and evolution of glaucoma implant designs into three technological waves, which include microtube (1st), microvalve (2nd) and microsystem (3rd). With the emerging trends of minimal invasiveness and artificial intelligence in the development of medical implants, we envision that a comprehensive glaucoma treatment microsystem is on the horizon, which is featured with active and wireless control of IOP, real-time continuous monitoring of IOP and aqueous rate, etc. The current review could potentially cast light on the unmatched needs, challenges, and future directions of the microfluidic structural and functional designs of glaucoma implants, which would enable an enhanced safety profile, reduced complications, increased efficacy of lowering IOP and reduced IOP fluctuations, closed-loop and on-demand control of IOP, etc.
Collapse
Affiliation(s)
- Zecong Fang
- Bionic Sensing and Intelligence Center (BSIC), Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China.
| | - Shuzhen Bi
- Center for Intelligent Medical Equipment and Devices (iMED), University of Science and Technology of China, Suzhou, Jiangsu, 215123, China
| | | | - Junyi Chen
- Department of Ophthalmology and Visual Science, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, 200031, China
- NHC Key Laboratory of Myopia, Chinese Academy of Medical Sciences, and Shanghai Key Laboratory of Visual Impairment and Restoration (Fudan University), Shanghai, 200031, China
| | - Tingrui Pan
- Bionic Sensing and Intelligence Center (BSIC), Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China.
- Center for Intelligent Medical Equipment and Devices (iMED), University of Science and Technology of China, Suzhou, Jiangsu, 215123, China
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230026, China
| |
Collapse
|
3
|
Mahmood TH, Al-Samydai A, Sulaibi MA, Alqaraleh M, Abed AI, Shalan N, Alsanabrah A, Alsotari ST, Nsairat H, Alshaer W. Development of Pegylated Nano-Phytosome Formulation with Oleuropein and Rutin to Compare Anti-Colonic Cancer Activity with Olea Europaea Leaves Extract. Chem Biodivers 2023; 20:e202300534. [PMID: 37498138 DOI: 10.1002/cbdv.202300534] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 07/28/2023]
Abstract
Olive leaf extract is a valuable source of phenolic compounds; primarily, oleuropein (major component) and rutin. This natural olive leaf extract has potential use as a therapeutic agent for cancer treatment. However, its clinical application is hindered by poor pharmacokinetics and low stability. To overcome these limitations, this study aimed to enhance the anticancer activity and stability of oleuropein and rutin by loading them into PEGylated Nano-phytosomes. The developed PEGylated Nano-phytosomes exhibited favorable characteristics in terms of size, charge, and stability. Notably, the anticolonic cancer activity of the Pegylated Nano-phytosomes loaded with oleuropein (IC50=0.14 μM) and rutin (IC50=0.44 μM) surpassed that of pure oleuropein and rutin alone. This outcome highlights the advantageous impact of Nano-phytosomes to augment the anticancer potential of oleuropein and rutin. These results present a promising pathway for the future development of oleuropein and rutin Nano-phytosomes as effective options for passive tumor-targeted therapy, given their improved stability and efficacy.
Collapse
Affiliation(s)
- Tabarek H Mahmood
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | - Ali Al-Samydai
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | - Mazen Al Sulaibi
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | - Moath Alqaraleh
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | - Anas Ibrahim Abed
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | - Naeem Shalan
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | - Alaa Alsanabrah
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | | | - Hamdi Nsairat
- Faculty of Pharmacy, Pharmacological and Diagnostic Research Center, Al-Ahliyya Amman University, Amman, Jordan
| | - Walhan Alshaer
- Cell Therapy Center, The University of Jordan, Amman, 11942, Jordan
| |
Collapse
|
4
|
Li Y, Fromme T. Uncoupling Protein 1 Does Not Produce Heat without Activation. Int J Mol Sci 2022; 23:2406. [PMID: 35269549 PMCID: PMC8910648 DOI: 10.3390/ijms23052406] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/16/2022] [Accepted: 02/18/2022] [Indexed: 12/21/2022] Open
Abstract
Mitochondrial uncoupling protein 1 (UCP1) is the crucial mechanistic component of heat production in classical brown fat and the newly identified beige or brite fat. Thermogenesis inevitably comes at a high energetic cost and brown fat, ultimately, is an energy-wasting organ. A constrained strategy that minimizes brown fat activity unless obligate will have been favored during natural selection to safeguard metabolic thriftiness. Accordingly, UCP1 is constitutively inhibited and is inherently not leaky without activation. It follows that increasing brown adipocyte number or UCP1 abundance genetically or pharmacologically does not lead to an automatic increase in thermogenesis or subsequent metabolic consequences in the absence of a plausible route of concomitant activation. Despite its apparent obviousness, this tenet is frequently ignored. Consequently, incorrect conclusions are often drawn from increased BAT or brite/beige depot mass, e.g., predicting or causally linking beneficial metabolic effects. Here, we highlight the inherently inactive nature of UCP1, with a particular emphasis on the molecular brakes and releases of UCP1 activation under physiological conditions. These controls of UCP1 activity represent potential targets of therapeutic interventions to unlock constraints and efficiently harness the energy-expending potential of brown fat to prevent and treat obesity and associated metabolic disorders.
Collapse
Affiliation(s)
- Yongguo Li
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Tobias Fromme
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| |
Collapse
|
5
|
Paduthol G, Korma TS, Agrawal A, Paul D. Dynamic generation of power function gradient profiles in a universal microfluidic gradient generator by controlling the inlet flow rates. LAB ON A CHIP 2022; 22:592-604. [PMID: 34985077 DOI: 10.1039/d1lc00938a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We report a two-inlet universal microfluidic gradient generator capable of generating gradient profiles of the functional form xp in the same device by controlling only the inlet flow rates. We have developed an analytical model to predict the inlet flow rates needed to generate a user-specified gradient profile at the outlet. We have validated this model by performing both COMSOL simulations and experiments. Our experiments show an excellent match between the target functions (x0.33, x1, x2 and x3) and the gradient profiles generated in this device. Unlike the universal gradient generators reported earlier, our device does not require changing the positions of the internal barriers for each new gradient profile, thereby making it easier for the user to operate this device.
Collapse
Affiliation(s)
- Gauri Paduthol
- Department of Bioscience and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Teji Shenne Korma
- Department of Bioscience and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Amit Agrawal
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debjani Paul
- Department of Bioscience and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| |
Collapse
|
6
|
Stewart KME, Al‐Ghamdi M, Khater M, Abdel‐Rahman EM, Penlidis A. An overview of sensors and sensing materials for heavy metals in aqueous environments. CAN J CHEM ENG 2021. [DOI: 10.1002/cjce.24139] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Majed Al‐Ghamdi
- National Center for Electronics and Photonics Technology, King Abdulaziz City for Science and Technology (KACST) Riyadh Saudi Arabia
| | - Mahmoud Khater
- Department of Mechanical Engineering KFUPM Dhahran Saudi Arabia
| | - Eihab M. Abdel‐Rahman
- Department of Systems Design Engineering University of Waterloo Waterloo Ontario Canada
| | - Alexander Penlidis
- Department of Chemical Engineering, Institute for Polymer Research University of Waterloo Waterloo Ontario Canada
| |
Collapse
|
7
|
Sweet E, Yang B, Chen J, Vickerman R, Lin Y, Long A, Jacobs E, Wu T, Mercier C, Jew R, Attal Y, Liu S, Chang A, Lin L. 3D microfluidic gradient generator for combination antimicrobial susceptibility testing. MICROSYSTEMS & NANOENGINEERING 2020; 6:92. [PMID: 34567702 PMCID: PMC8433449 DOI: 10.1038/s41378-020-00200-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/25/2020] [Accepted: 08/01/2020] [Indexed: 06/13/2023]
Abstract
Microfluidic concentration gradient generators (µ-CGGs) have been utilized to identify optimal drug compositions through antimicrobial susceptibility testing (AST) for the treatment of antimicrobial-resistant (AMR) infections. Conventional µ-CGGs fabricated via photolithography-based micromachining processes, however, are fundamentally limited to two-dimensional fluidic routing, such that only two distinct antimicrobial drugs can be tested at once. This work addresses this limitation by employing Multijet-3D-printed microchannel networks capable of fluidic routing in three dimensions to generate symmetric multidrug concentration gradients. The three-fluid gradient generation characteristics of the fabricated 3D µ-CGG prototype were quantified through both theoretical simulations and experimental validations. Furthermore, the antimicrobial effects of three highly clinically relevant antibiotic drugs, tetracycline, ciprofloxacin, and amikacin, were evaluated via experimental single-antibiotic minimum inhibitory concentration (MIC) and pairwise and three-way antibiotic combination drug screening (CDS) studies against model antibiotic-resistant Escherichia coli bacteria. As such, this 3D µ-CGG platform has great potential to enable expedited combination AST screening for various biomedical and diagnostic applications.
Collapse
Affiliation(s)
- Eric Sweet
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
| | - Brenda Yang
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Joshua Chen
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Reed Vickerman
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720 USA
| | - Yujui Lin
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
| | - Alison Long
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Eric Jacobs
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Tinglin Wu
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Camille Mercier
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Ryan Jew
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Yash Attal
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
- Department of Bioengineering, University of California, Berkeley, CA 94720 USA
| | - Siyang Liu
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
| | - Andrew Chang
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
| | - Liwei Lin
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
- Berkeley Sensor and Actuator Center, Berkeley, CA 94720 USA
| |
Collapse
|
8
|
Sweet E, Mehta R, Xu Y, Jew R, Lin R, Lin L. Finger-powered fluidic actuation and mixing via MultiJet 3D printing. LAB ON A CHIP 2020; 20:3375-3385. [PMID: 32766613 DOI: 10.1039/d0lc00488j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Additive manufacturing, or three-dimensional (3D) printing, has garnered significant interest in recent years towards the fabrication of sub-millimeter scale devices for an ever-widening array of chemical, biological and biomedical applications. Conventional 3D printed fluidic systems, however, still necessitate the use of non-portable, high-powered external off-chip sources of fluidic actuation, such as electro-mechanical pumps and complex pressure-driven controllers, thus limiting their scope towards point-of-need applications. This work proposes entirely 3D printed sources of human-powered fluidic actuation which can be directly incorporated into the design of any 3D printable sub-millifluidic or microfluidic system where electrical power-free operation is desired. Multiple modular, single-fluid finger-powered actuator (FPA) designs were fabricated and experimentally characterized. Furthermore, a new 3D fluidic one-way valve concept employing a dynamic bracing mechanism was developed, demonstrating a high diodicity of ∼1117.4 and significant reduction in back-flow from the state-of-the-art. As a result, fabricated FPA prototypes achieved tailorable experimental fluid flow rates from ∼100 to ∼3000 μL min-1 without the use of electricity. Moreover, a portable human-powered two-fluid pulsatile fluidic mixer, capable of generating fully-mixed fluids in 10 seconds, is presented, demonstrating the application of FPAs towards on-chip integration into more complex 3D printed fluidic networks.
Collapse
Affiliation(s)
- Eric Sweet
- Department of Mechanical Engineering, University of California, Berkeley, USA.
| | | | | | | | | | | |
Collapse
|
9
|
Ren C, Bayin Q, Feng S, Fu Y, Ma X, Guo J. Biomarkers detection with magnetoresistance-based sensors. Biosens Bioelectron 2020; 165:112340. [PMID: 32729483 DOI: 10.1016/j.bios.2020.112340] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 05/27/2020] [Accepted: 05/28/2020] [Indexed: 01/06/2023]
Abstract
Biosensing platforms for detecting and quantifying biomarkers have played an important role in the past decade. Among them, platforms based on magnetoresistance (MR) sensing technology are attractive. The resistance value of the material changes with the externally applied magnetic field is the core mechanism of MR sensing technology. A typical MR-based sensor has the characteristics of cost-effective, simple operation, high compactness, and high sensitivity. Moreover, using magnetic nanoparticles (MNPs) as labels, MR-based sensors have the ability to overcome the high background noise of complex samples, so they are particularly suitable for point-of-care testing (POCT). However, the problem still exists. How to obtain high-throughput, that is, multiple detections of biomarkers in MR-based sensors, thereby improving detection efficiency and reducing the burden on patients is an important issue in future work. This paper reviews three MR-based detection technologies for the detection of biomarkers, i.e., anisotropic magnetoresistance (AMR), giant magnetoresistance (GMR), and tunneling magnetoresistance (TMR). Based on these three common technologies, different typical applications that include biomedical diagnosis, food safety, and environmental monitoring are presented. Furthermore, the existing MR-based detection method is better expanded to make it more in line with present detection needs by combining different advanced technologies including microfluidics, Microelectromechanical systems (MEMS), and Immunochromatographic test strips (ICTS). And then, a brief discussion of current challenges and perspectives of MR-based sensors are pointed out.
Collapse
Affiliation(s)
- Chunhui Ren
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, PR China
| | - Qiaoge Bayin
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, PR China
| | - Shilun Feng
- School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore
| | - Yusheng Fu
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, PR China
| | - Xing Ma
- State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China; Ministry of Education Key Lab of Micro-systems and Micro-structures Manufacturing, Harbin Institute of Technology, Harbin, 150001, PR China
| | - Jinhong Guo
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, PR China.
| |
Collapse
|
10
|
Ma J, Yan S, Miao C, Li L, Shi W, Liu X, Luo Y, Liu T, Lin B, Wu W, Lu Y. Paper Microfluidics for Cell Analysis. Adv Healthc Mater 2019; 8:e1801084. [PMID: 30474359 DOI: 10.1002/adhm.201801084] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/20/2018] [Indexed: 01/04/2023]
Abstract
Paper microfluidics has attracted much attention since its first introduction around one decade ago due to the merits such as low cost, ease of fabrication and operation, portability, and facile integration with other devices. The dominant application for paper microfluidics still lies in point-of-care testing (POCT), which holds great promise to provide diagnostic tools to meet the ASSURED criteria. With micro/nanostructures inside, paper substrates provide a natural 3D scaffold to mimic native cellular microenvironments and create excellent biointerfaces for cell analysis applications, such as long-term 3D cell culture, cell capture/phenotyping, and cell-related biochemical analysis (small molecules, protein DNA, etc.). This review summarizes cell-related applications based on various engineered paper microdevices and provides some perspectives for paper microfluidics-based cell analysis.
Collapse
Affiliation(s)
- Jun Ma
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 China
- State Key Laboratory of Applied Optics; Chuangchun 130033 China
| | - Shiqiang Yan
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 China
| | - Chunyue Miao
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 China
| | - Linmei Li
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 China
| | - Weiwei Shi
- Second Affiliated Hospital of Dalian Medical University; Dalian 116023 China
| | - Xianming Liu
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 China
| | - Yong Luo
- State Key Laboratory of Fine Chemicals; Department of Chemical Engineering & School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116044 China
| | - Tingjiao Liu
- College of Stomatology; Dalian Medical University; Dalian 116044 China
| | - Bingcheng Lin
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 China
| | - Wenming Wu
- State Key Laboratory of Applied Optics; Chuangchun 130033 China
| | - Yao Lu
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 China
| |
Collapse
|
11
|
Wang T, Xu G, Wu W, Wang X, Chen X, Zhou S, You F. A novel combination of quick response code and microfluidic paper-based analytical devices for rapid and quantitative detection. Biomed Microdevices 2018; 20:79. [DOI: 10.1007/s10544-018-0325-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
12
|
Lecomte A, Descamps E, Bergaud C. A review on mechanical considerations for chronically-implanted neural probes. J Neural Eng 2018; 15:031001. [DOI: 10.1088/1741-2552/aa8b4f] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
13
|
Todros S, Pavan PG, Pachera P, Pace G, Di Noto V, Natali AN. Interplay between physicochemical and mechanical properties of poly(ethylene terephthalate) meshes for hernia repair. J Appl Polym Sci 2017. [DOI: 10.1002/app.46014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Silvia Todros
- Department of Industrial Engineering; Centre for Mechanics of Biological Materials, University of Padova; Via Venezia 1, Padova PD 35131 Italy
| | - Piero Giovanni Pavan
- Department of Industrial Engineering; Centre for Mechanics of Biological Materials, University of Padova; Via Venezia 1, Padova PD 35131 Italy
| | - Paola Pachera
- Department of Industrial Engineering; Centre for Mechanics of Biological Materials, University of Padova; Via Venezia 1, Padova PD 35131 Italy
| | | | - Vito Di Noto
- Section of Chemistry for Technology, Department of Industrial Engineering; University of Padua; Via Marzolo 1, Padova PD 35131 Italy
| | - Arturo Nicola Natali
- Department of Industrial Engineering; Centre for Mechanics of Biological Materials, University of Padova; Via Venezia 1, Padova PD 35131 Italy
| |
Collapse
|
14
|
Ghanad MA, Green MM, Dehollain C. A 30 $\mu\text{W}$ Remotely Powered Local Temperature Monitoring Implantable System. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2017; 11:54-63. [PMID: 27514065 DOI: 10.1109/tbcas.2016.2574895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An implantable local temperature monitoring system for a laboratory mouse is presented. Magnetic coupling is used to remotely power the passive implant. The temperatures of two local points are monitored by thermistors. A low-power readout circuit is implemented by directly amplifying and resolving the sensor response in the time domain. A free-running oscillator operating at 868 MHz transmits the sensor data to the base station. The average power dissipation of the implant is decreased by time interleaving between the sensor readout and the data communication. The power transfer to the implant is also time interleaved with other operations to avoid interference with data communication. A voltage regulation loop for the implant based on controlling the duration of powering the base station power amplifier is also described. A prototype chip is implemented in 0.18 [Formula: see text] CMOS. The implant requires average RF power of 29.5 [Formula: see text] for operation and is capable of measuring two thermistors with accuracy of ±0.05 °C.
Collapse
|
15
|
Tian J, Gao Y, Zhou B, Cao W, Wu X, Wen W. A valve-free 2D concentration gradient generator. RSC Adv 2017. [DOI: 10.1039/c7ra02139a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Our designed chip with a criss-cross 3D flow path realizes a valve-free 2D concentration gradient generator.
Collapse
Affiliation(s)
- Jingxuan Tian
- Department of Physics
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Yibo Gao
- Department of Physics
- The Hong Kong University of Science and Technology
- Kowloon
- China
- Environmental Science Programs
| | - Bingpu Zhou
- Institute of Applied Physics and Materials Engineering
- Faculty of Science and Technology
- University of Macau
- Taipa
- China
| | - Wenbin Cao
- Department of Physics
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Xiaoxiao Wu
- Department of Physics
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Weijia Wen
- Department of Physics
- The Hong Kong University of Science and Technology
- Kowloon
- China
| |
Collapse
|
16
|
Shekhar H, Bader KB, Huang S, Peng T, Huang S, McPherson DD, Holland CK. In vitro thrombolytic efficacy of echogenic liposomes loaded with tissue plasminogen activator and octafluoropropane gas. Phys Med Biol 2016; 62:517-538. [PMID: 28002053 DOI: 10.1088/1361-6560/62/2/517] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Echogenic liposomes loaded with the thrombolytic recombinant tissue-type plasminogen activator (rt-PA) are under development for the treatment of ischemic stroke. These agents are designed to co-encapsulate cavitation nuclei to promote bubble activity in response to ultrasound exposure, and to enable localized delivery of thrombolytic. Stable cavitation improves the efficacy of the thrombolytic through enhanced fluid mixing. Echogenic liposomes that encapsulate air-filled microbubbles nucleate scant stable cavitation activity in response to 120 kHz intermittent ultrasound exposure, and have demonstrated thrombolytic efficacy equivalent to rt-PA alone. It was hypothesized that encapsulating octafluoropropane (OFP) gas within rt-PA-loaded liposomes instead of air will enhance ultrasound-mediated stable cavitation activity and increase thrombolytic efficacy compared to previous studies. The thrombolytic efficacy and cavitation activity nucleated from liposomes that encapsulate OFP microbubbles and rt-PA (OFP t-ELIP) was evaluated in vitro. Human whole blood clots were exposed to human fresh-frozen plasma alone, rt-PA (0, 0.32, 1.58, and 3.15 µg ml-1), or OFP t-ELIP at equivalent enzymatic activity, with and without exposure to intermittent ultrasound. Further, numerical simulations were performed to gain insight into the mechanisms of cavitation nucleation. Sustained ultraharmonic activity was nucleated from OFP t-ELIP when exposed to ultrasound. Furthermore, the thrombolytic efficacy was enhanced compared to rt-PA alone at concentrations of 1.58 µg ml-1 and 3.15 µg ml-1 (p < 0.05). These results indicate that OFP t-ELIP can nucleate sustained stable cavitation activity and enhance the efficacy of thrombolysis.
Collapse
Affiliation(s)
- Himanshu Shekhar
- Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cincinnati, OH, USA
| | | | | | | | | | | | | |
Collapse
|
17
|
Powell CR. Conditional Electrical Stimulation in Animal and Human Models for Neurogenic Bladder: Working Toward a Neuroprosthesis. CURRENT BLADDER DYSFUNCTION REPORTS 2016; 11:379-385. [PMID: 27920880 PMCID: PMC5134915 DOI: 10.1007/s11884-016-0388-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Sacral neuromodulation has had a tremendous impact on the treatment of urinary incontinence and lower urinary tract symptoms for patients with neurologic conditions. This stimulation does not use real-time data from the body or input from the patient. Incorporating this is the goal of those pursuing a neuroprosthesis to enhance bladder function for these patients. Investigators have demonstrated the effectiveness of conditional (also called closed-loop) feedback in animal models as well as limited human studies. Dorsal genital nerve, pudendal nerve, S3 afferent nerve roots, S1 and S2 ganglia have all been used as targets for stimulation. Most of these have also been used as sources of afferent nerve information using sophisticated nerve electrode arrays and filtering algorithms to detect significant bladder events and even to estimate the fullness of the bladder. There are problems with afferent nerve sensing, however. Some of these include sensor migration and low signal to noise ratios. Implantable pressure sensors have also been investigated that have their own unique challenges, such as erosion and sensor drift. As technology improves, an intelligent neuroprosthesis with the ability to sense significant bladder events and stimulate as needed will evolve.
Collapse
Affiliation(s)
- C R Powell
- Indiana University School of Medicine, Department of Urology, 535 Barnhill Dr., Suite 420, Indianapolis, IN 46202, USA,
| |
Collapse
|
18
|
Vandal M, White PJ, Tournissac M, Tremblay C, St-Amour I, Drouin-Ouellet J, Bousquet M, Traversy MT, Planel E, Marette A, Calon F. Impaired thermoregulation and beneficial effects of thermoneutrality in the 3×Tg-AD model of Alzheimer's disease. Neurobiol Aging 2016; 43:47-57. [PMID: 27255814 DOI: 10.1016/j.neurobiolaging.2016.03.024] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Revised: 03/21/2016] [Accepted: 03/22/2016] [Indexed: 10/22/2022]
Abstract
The sharp rise in the incidence of Alzheimer's disease (AD) at an old age coincides with a reduction in energy metabolism and core body temperature. We found that the triple-transgenic mouse model of AD (3×Tg-AD) spontaneously develops a lower basal body temperature and is more vulnerable to a cold environment compared with age-matched controls. This was despite higher nonshivering thermogenic activity, as evidenced by brown adipose tissue norepinephrine content and uncoupling protein 1 expression. A 24-hour exposure to cold (4 °C) aggravated key neuropathologic markers of AD such as: tau phosphorylation, soluble amyloid beta concentrations, and synaptic protein loss in the cortex of 3×Tg-AD mice. Strikingly, raising the body temperature of aged 3×Tg-AD mice via exposure to a thermoneutral environment improved memory function and reduced amyloid and synaptic pathologies within a week. Our results suggest the presence of a vicious cycle between impaired thermoregulation and AD-like neuropathology, and it is proposed that correcting thermoregulatory deficits might be therapeutic in AD.
Collapse
Affiliation(s)
- Milene Vandal
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada
| | - Philip J White
- Sarah W. Stedman Nutrition and Metabolism Center and Duke Molecular Physiology Institute, Duke University Medical Center, NC, USA; Faculté de medicine, Université Laval, Québec, Québec, Canada; Institut universitaire de pneumologie et de cardiologie de Québec, Québec, Québec, Canada
| | - Marine Tournissac
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada
| | - Cyntia Tremblay
- Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada
| | - Isabelle St-Amour
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Département de Recherche et Développement, Héma-Québec, Québec, Québec, Canada
| | - Janelle Drouin-Ouellet
- Faculté de medicine, Université Laval, Québec, Québec, Canada; John van Geest Centre for Brain Repair, University of Cambridge, Cambridge, UK
| | - Melanie Bousquet
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada
| | - Marie-Thérèse Traversy
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada
| | - Emmanuel Planel
- Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Faculté de medicine, Université Laval, Québec, Québec, Canada
| | - Andre Marette
- Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada; Faculté de medicine, Université Laval, Québec, Québec, Canada; Institut universitaire de pneumologie et de cardiologie de Québec, Québec, Québec, Canada
| | - Frederic Calon
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada.
| |
Collapse
|