1
|
Ashour MM, Mabrouk M, Aboelnasr MA, Beherei HH, Tohamy KM, Das DB. Anti-Obesity Drug Delivery Systems: Recent Progress and Challenges. Pharmaceutics 2023; 15:2635. [PMID: 38004612 PMCID: PMC10674714 DOI: 10.3390/pharmaceutics15112635] [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: 10/15/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
Obesity has reached an epidemic proportion in the last thirty years, and it is recognized as a major health issue in modern society now with the possibility of serious social and economic consequences. By the year 2030, nearly 60% of the global population may be obese or overweight, which emphasizes a need for novel obesity treatments. Various traditional approaches, such as pharmacotherapy and bariatric surgery, have been utilized in clinical settings to treat obesity. However, these methods frequently show the possibility of side effects while remaining ineffective. There is, therefore, an urgent need for alternative obesity treatments with improved efficacy and specificity. Polymeric materials and chemical strategies are employed in emerging drug delivery systems (DDSs) to enhance therapy effectiveness and specificity by stabilizing and controlling the release of active molecules such as natural ingredients. Designing DDSs is currently a top priority research objective with an eye towards creating obesity treatment approaches. In reality, the most recent trends in the literature demonstrate that there are not enough in-depth reviews that emphasize the current knowledge based on the creation and design of DDSs for obesity treatment. It is also observed in the existing literature that a complex interplay of different physical and chemical parameters must be considered carefully to determine the effectiveness of the DDSs, including microneedles, for obesity treatment. Additionally, it is observed that these properties depend on how the DDS is synthesized. Although many studies are at the animal-study stage, the use of more advanced DDS techniques would significantly enhance the development of safe and efficient treatment approaches for obese people in the future. Considering these, this review provides an overview of the current anti-obesity treatment approaches as well as the conventional anti-obesity therapeutics. The article aims to conduct an in-depth discussion on the current trends in obesity treatment approaches. Filling in this knowledge gap will lead to a greater understanding of the safest ways to manage obesity.
Collapse
Affiliation(s)
- Mohamed M. Ashour
- School of Biotechnology, Badr University in Cairo, Badr City, Cairo 11829, Egypt;
| | - Mostafa Mabrouk
- Refractories, Ceramics and Building Materials Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt;
| | - Mohamed A. Aboelnasr
- Biophysics Branch, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt; (M.A.A.); (K.M.T.)
| | - Hanan H. Beherei
- Refractories, Ceramics and Building Materials Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt;
| | - Khairy M. Tohamy
- Biophysics Branch, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt; (M.A.A.); (K.M.T.)
| | - Diganta B. Das
- Department of Chemical Engineering, Loughborough University, Loughborough LE113TU, UK
| |
Collapse
|
2
|
Kim S, Kim G, Ji YW, Moon CE, Jung Y, Lee HK, Lee J, Koh WG. Real-time and label-free biosensing using moiré pattern generated by bioresponsive hydrogel. Bioact Mater 2023; 23:383-393. [DOI: 10.1016/j.bioactmat.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/14/2022] [Accepted: 11/15/2022] [Indexed: 11/30/2022] Open
|
3
|
Hossain L, De Francesco M, Tedja P, Tanner J, Garnier G. Nanocellulose coated paper diagnostic to measure glucose concentration in human blood. Front Bioeng Biotechnol 2022; 10:1052242. [DOI: 10.3389/fbioe.2022.1052242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/04/2022] [Indexed: 11/23/2022] Open
Abstract
A new generation of rapid, easy to use and robust colorimetric point of care (POC) nanocellulose coated-paper sensors to measure glucose concentration in blood is presented in this study. The cellulose gel containing the enzyme with co-additive is coated and dried onto a paper substrate. Nanocellulose gel is used to store, immobilize and stabilize enzymes within its structure to prolong enzyme function and enhance its availability. Here, we immobilize glucose oxidase within the gel structure to produce a simple colorimetric blood glucose sensor. Increase in blood glucose concentration increases the concentration of reaction product which decreases the system pH detected by the pH indicative dye entrapped in the nanocellulose gel. The sensor produces a color change from red to orange as pH decreases due to the enzymatic reaction of glucose into gluconic acid and hydrogen peroxide. This sensor can measure glucose concentrations of 7–13 mM (medical range for diabetes control) at temperatures of 4°C–40°C. Stability tests confirm that no denaturation of enzyme occurs by measuring enzyme activity after 4 weeks. A prototype device is designed to instantly measure the glucose concentration from blood in a two steps process: 1) red blood cell separation and 2) quantification of glucose by color change. This study demonstrates nanocellulose sensor as an economical, robust, and sensitive diagnostic technology platform for a broad spectrum of diseases.
Collapse
|
4
|
Thioflavin-modified molecularly imprinted hydrogel for fluorescent-based non-enzymatic glucose detection in wound exudate. Mater Today Bio 2022; 14:100258. [PMID: 35469256 PMCID: PMC9034389 DOI: 10.1016/j.mtbio.2022.100258] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/30/2022] [Accepted: 04/05/2022] [Indexed: 11/30/2022] Open
Abstract
The concentration of glucose in the body's fluids is an important parameter that can indicate pathological conditions such as the progress of infected wounds. Several wearables and implantable detection approaches have been developed with high selectivity and sensitivity for glucose. However, all of them have drawbacks such as low stability, limited selectivity, and often require complex technology. In this work, we present a fluorescent-based cost-efficient imprinted hydrogel (MIH_GSH) capable of detecting glucose within 30 min. The imprinting approach allows us to improve the selectivity for glucose, overcoming the low specificity and limited binding efficiency at neutral pH of boronic acid-based detection mechanisms. The binding affinity determined for glucose-MIH_GSH was indeed 6-fold higher than the one determined for the non-imprinted hydrogel with a calculated imprinting factor of 1.7. The limit of detection of MIH_GSH for glucose in artificial wound exudate was calculated as 0.48 mM at pH 7.4 proving the suitability of the proposed approach to diagnose chronic wounds (ca. 1 mM). MIH_GSH was compared with a commercial colorimetric assay for the quantification of glucose in wound exudate specimens collected from hospitalized patients. The results obtained with the two methods were statistically similar confirming the robustness of our approach. Importantly, whereas with the colorimetric assay sample preparation was required to limit the interference of the sample background, the fluorescent signal of MIH_GSH was not affected even when used to measure glucose directly in bloody samples. The sensing mechanism here proposed can pave the way for the development of cost-efficient and wearable point-of-care tools capable of monitoring the glucose level in wound exudate enabling the quick assessment of chronic injuries. Highly sensitive and selective non-enzymatic approach to detect glucose in wound exudate. The fluorescent-based method ensured the detection of glucose in complex biological samples. The imprinting approach allowed overcoming the drawback of boronic acid-based methods. The cost-efficient approach is suitable for the development of point-of-care devices.
Collapse
|
5
|
Gao Y, Wang Y, Dai Y, Wang Q, Xiang P, Li Y, Gao G. Amylopectin based hydrogel strain sensor with good biocompatibility, high toughness and stable anti-swelling in multiple liquid media. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110981] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
6
|
Gosecka M, Gosecki M, Urbaniak M. Composite Dynamic Hydrogels Constructed on Boronic Ester Cross-Links with NIR-Enhanced Diffusivity. Biomacromolecules 2022; 23:948-959. [PMID: 34986638 DOI: 10.1021/acs.biomac.1c01359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dynamic hydrogels with thermosensitive cross-links are highly promising platforms for "on-demand" drug delivery systems. However, there is a problem with triggering a response in their whole volume, which reduces their efficiency. To achieve better thermoresponsiveness, a graphene oxide-filled composite hydrogel based on boronic ester cross-links, composed of hyperbranched polyglycidol, HbPGL, and poly(acrylamide-ran-2-acrylamidephenylboronic acid), poly(AM-ran-2-AAPBA), has been constructed. The homogeneous embedment of graphene oxide (GO) in the network assured near-infrared (NIR)-photothermal response in its bulk due to the rapid light-to-heat conversion. The rate and amplitude of materials response increase with graphene oxide concentration. The temperature of the hydrogel containing graphene oxide at a concentration of 13.2 mg/mL increased from 36.6 to 41 °C in 29 s upon NIR irradiation. The network diffusivity and the extent of its change with temperature can be regulated by the length of the applied boronic acid-based cross-linking agent. The hydrogel constructed on the shorter copolymer (Mn = 23 000 g/mol) displayed a significant increase in diffusivity with temperature. A diffusion ordered NMR study revealed that the diffusion coefficient determined for niacin, a model drug encapsulated in the hydrogel, increased from 6.09 × 10-10 at 25 °C to 1.28 × 10-9 m2/s at 41 °C. In the case of the hydrogel constructed on the longer acrylamide copolymer (Mn = 43 000 g/mol), in which physical entanglements stabilize the network, the change of encapsulated niacin diffusion coefficient was significantly smaller, i.e., from 3.83 × 10-10 at 25 °C to 6.63 × 10-10 m2/s at 41 °C. The possibility of on-demand NIR-regulated diffusivity of the reported boronic ester-based hydrogels makes them promising candidates for controlled drug delivery platforms.
Collapse
Affiliation(s)
- Monika Gosecka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Mateusz Gosecki
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Malgorzata Urbaniak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| |
Collapse
|
7
|
El-Husseiny HM, Mady EA, Hamabe L, Abugomaa A, Shimada K, Yoshida T, Tanaka T, Yokoi A, Elbadawy M, Tanaka R. Smart/stimuli-responsive hydrogels: Cutting-edge platforms for tissue engineering and other biomedical applications. Mater Today Bio 2022; 13:100186. [PMID: 34917924 PMCID: PMC8669385 DOI: 10.1016/j.mtbio.2021.100186] [Citation(s) in RCA: 88] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/14/2021] [Accepted: 12/08/2021] [Indexed: 02/07/2023] Open
Abstract
Recently, biomedicine and tissue regeneration have emerged as great advances that impacted the spectrum of healthcare. This left the door open for further improvement of their applications to revitalize the impaired tissues. Hence, restoring their functions. The implementation of therapeutic protocols that merge biomimetic scaffolds, bioactive molecules, and cells plays a pivotal role in this track. Smart/stimuli-responsive hydrogels are remarkable three-dimensional (3D) bioscaffolds intended for tissue engineering and other biomedical purposes. They can simulate the physicochemical, mechanical, and biological characters of the innate tissues. Also, they provide the aqueous conditions for cell growth, support 3D conformation, provide mechanical stability for the cells, and serve as potent delivery matrices for bioactive molecules. Many natural and artificial polymers were broadly utilized to design these intelligent platforms with novel advanced characteristics and tailored functionalities that fit such applications. In the present review, we highlighted the different types of smart/stimuli-responsive hydrogels with emphasis on their synthesis scheme. Besides, the mechanisms of their responsiveness to different stimuli were elaborated. Their potential for tissue engineering applications was discussed. Furthermore, their exploitation in other biomedical applications as targeted drug delivery, smart biosensors, actuators, 3D and 4D printing, and 3D cell culture were outlined. In addition, we threw light on smart self-healing hydrogels and their applications in biomedicine. Eventually, we presented their future perceptions in biomedical and tissue regeneration applications. Conclusively, current progress in the design of smart/stimuli-responsive hydrogels enhances their prospective to function as intelligent, and sophisticated systems in different biomedical applications.
Collapse
Affiliation(s)
- Hussein M. El-Husseiny
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo, 1838509, Japan
- Department of Surgery, Anesthesiology, and Radiology, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, Elqaliobiya, 13736, Egypt
| | - Eman A. Mady
- Department of Animal Hygiene, Behavior and Management, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, Elqaliobiya, 13736, Egypt
| | - Lina Hamabe
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo, 1838509, Japan
| | - Amira Abugomaa
- Faculty of Veterinary Medicine, Mansoura University, Mansoura, Dakahliya, 35516, Egypt
| | - Kazumi Shimada
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo, 1838509, Japan
- Division of Research Animal Laboratory and Translational Medicine, Research and Development Center, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka, 569-8686, Japan
| | - Tomohiko Yoshida
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo, 1838509, Japan
| | - Takashi Tanaka
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo, 1838509, Japan
| | - Aimi Yokoi
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo, 1838509, Japan
| | - Mohamed Elbadawy
- Department of Pharmacology, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, Elqaliobiya, 13736, Egypt
| | - Ryou Tanaka
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo, 1838509, Japan
| |
Collapse
|
8
|
Kairy PD, Farhoudi N, Binder S, Magda JJ, Kuck K, Solzbacher F, Reiche CF. Catheter-mounted smart hydrogel ultrasound resonators for intravenous analyte monitoring. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2021; 2021:7476-7479. [PMID: 34892822 PMCID: PMC10688543 DOI: 10.1109/embc46164.2021.9630671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Continuous monitoring of drug concentrations in blood plasma can be beneficial to guide individualized drug administration. High interpatient variability in required dosage and a small therapeutic window of certain drugs, such as anesthetic medications, can cause risks and challenges in accurate dosing during administration. In this work, we present a sensing platform concept using a smart hydrogel micro resonator sheet with medical ultrasound readout that is integrated on the top of a catheter. This concept is validated in-vitro using glucose as an easy to access and handle target analyte. In the case of continuous glucose measurement, our novel catheter-mounted sensing platform allows the detection of glucose concentrations in the range of 0 mM to 12 mM. While these experiments use a well-known glucose-sensitive smart hydrogel for proof-of-principle experiments, this new sensing platform is intended to provide the basis for continuous monitoring of various intravenously applied medications. Selectivity to different drugs, e.g., fentanyl, can be accomplished by developing a corresponding smart hydrogel composition.Clinical Relevance- Many intravenous medications, especially anesthetics, show considerable pharmacokinetic inter-subject variability. Continuous monitoring of intravenous analyte concentrations would enable individualizing the administration of these drugs to the specific patient.
Collapse
|
9
|
Albumin Microspheres as "Trans-Ferry-Beads" for Easy Cell Passaging in Cell Culture Technology. Gels 2021; 7:gels7040176. [PMID: 34707076 PMCID: PMC8552077 DOI: 10.3390/gels7040176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 10/16/2021] [Indexed: 11/23/2022] Open
Abstract
Protein hydrogels represent ideal materials for advanced cell culture applications, including 3D-cultivation of even fastidious cells. Key properties of fully functional and, at the same time, economically successful cell culture materials are excellent biocompatibility and advanced fabrication processes allowing their easy production even on a large scale based on affordable compounds. Chemical crosslinking of bovine serum albumin (BSA) with N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide hydrochloride (EDC) in a water-in-oil emulsion with isoparaffinic oil as the continuous phase and sorbitan monooleate as surfactant generates micro-meter-scale spherical particles. They allow a significant simplification of an indispensable and laborious step in traditional cell culture workflows. This cell passaging (or splitting) to fresh culture vessels/flasks conventionally requires harsh trypsinization, which can be omitted by using the “trans-ferry-beads” presented here. When added to different pre-cultivated adherent cell lines, the beads are efficiently boarded by cells as passengers and can be easily transferred afterward for the embarkment of novel flasks. After this procedure, cells are perfectly viable and show normal growth behavior. Thus, the trans-ferry-beads not only may become extremely affordable as a final product but also may generally replace trypsinization in conventional cell culture, thereby opening new routes for the establishment of optimized and resource-efficient workflows in biological and medical cell culture laboratories.
Collapse
|
10
|
Zhang Y, Tao Y, Wang K, Zhao S, Zhu J, Cheng H. Two kinds of polyaniline fiber photo sensor with interdigital electrode and flexible hydrogel. J Appl Polym Sci 2021. [DOI: 10.1002/app.50628] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ying Zhang
- Department of Materials Science and Engineering Anhui University of Science and Technology Huainan China
| | - Yulun Tao
- Department of Materials Science and Engineering Anhui University of Science and Technology Huainan China
| | - Kequan Wang
- Department of Materials Science and Engineering Anhui University of Science and Technology Huainan China
| | - Shuai Zhao
- Department of Materials Science and Engineering Anhui University of Science and Technology Huainan China
| | - Jinbo Zhu
- Department of Materials Science and Engineering Anhui University of Science and Technology Huainan China
| | - Hao Cheng
- Department of Biological and Chemical Engineering Guangxi Key Laboratory of Green Processing of Sugar Resources Liuzhou China
| |
Collapse
|
11
|
Romero M, Macchione MA, Mattea F, Strumia M. The role of polymers in analytical medical applications. A review. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105366] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Cheng C, Harpster MH, Oakey J. Convection-driven microfabricated hydrogels for rapid biosensing. Analyst 2020; 145:5981-5988. [PMID: 32820752 PMCID: PMC7819640 DOI: 10.1039/d0an01069c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A microscale biosensing platform using rehydration-mediated swelling of bio-functionalized hydrogel structures and rapid target analyte capture is described. Induced convective flow mitigates diffusion limited incubation times, enabling model assays to be completed in under three minutes. Assay design parameters have been evaluated, revealing fabrication criteria required to tune detection sensitivity.
Collapse
Affiliation(s)
- Cheng Cheng
- Department of Chemical Engineering, University of Wyoming, Laramie, WY 82070, USA.
| | | | | |
Collapse
|
13
|
Farhoudi N, Leu HY, Laurentius LB, Magda JJ, Solzbacher F, Reiche CF. Smart Hydrogel Micromechanical Resonators with Ultrasound Readout for Biomedical Sensing. ACS Sens 2020; 5:1882-1889. [PMID: 32545953 DOI: 10.1021/acssensors.9b02180] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
One of the main challenges for implantable biomedical sensing schemes is obtaining a reliable signal while maintaining biocompatibility. In this work, we demonstrate that a combination of medical ultrasound imaging and smart hydrogel micromechanical resonators can be employed for continuous monitoring of analyte concentrations. The sensing principle is based on the shift of the mechanical resonance frequencies of smart hydrogel structures induced by their volume-phase transition in response to changing analyte levels. This shift can then be measured as a contrast change in the ultrasound images due to resonance absorption of ultrasound waves. This concept eliminates the need for implanting complex electronics or employing transcutaneous connections for sensing biomedical analytes in vivo. Here, we present proof-of-principle experiments that monitor in vitro changes in ionic strength and glucose concentrations to demonstrate the capabilities and potential of this versatile sensing platform technology.
Collapse
Affiliation(s)
- Navid Farhoudi
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Hsuan-Yu Leu
- Department of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Lars B. Laurentius
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jules J. Magda
- Department of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Florian Solzbacher
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, United States
- Department of Materials Science & Engineering, University of Utah, Salt Lake City, Utah 84112, United States
- Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Christopher F. Reiche
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| |
Collapse
|
14
|
Islam S, Park M, Song SH, Kim A. Hydrogel-Fractal Piezoelectric Bilayer Transducer for Wireless Biochemical Sensing. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2020; 2020:4089-4092. [PMID: 33018897 DOI: 10.1109/embc44109.2020.9175819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This paper reports on a novel transducer for wireless biochemical sensing. The bilayer transducer consists of a fractal piezoelectric membrane and pH-sensitive chemo-mechanical hydrogel, which overcomes many shortcomings in the chemical and biochemical sensing. The fractal design on the piezoelectric membrane enhances frequency response and linearity by employing periodically repeated pore architecture. As a basis of the pore, a Hilbert space-filling curve with modifications is used. On the surface of the fractal piezoelectric membrane, the hydrogel is laminated. When the bilayer transducer is introduced to a pH environment (e.g., pH = 4, 8, and 12), the hydrogel swells (or shrinks) and induces the curling of the bilayer transducer (10.47°/pH). The curvature then exhibits various ultrasound responses when the bilayer transducer was excited. The measured voltage outputs using an ultrasonic receiver were 0.393, 0.341, 0.250 mV/cm2 when curvature angles were 30°, 60°, and 120°, respectively. Overall pH sensitivity was 0.017 mV/cm2/pH. Ultimately, the biochemical sensing principle using a novel bilayer ultrasound transducer suggests a simple, low-cost, battery-less, and long-range wireless readout system as compared to traditional biochemical sensing.
Collapse
|
15
|
Dautta M, Alshetaiwi M, Escobar J, Tseng P. Passive and wireless, implantable glucose sensing with phenylboronic acid hydrogel-interlayer RF resonators. Biosens Bioelectron 2020; 151:112004. [PMID: 31999570 DOI: 10.1016/j.bios.2020.112004] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/28/2019] [Accepted: 01/02/2020] [Indexed: 02/04/2023]
Abstract
A phenylboronic acid-based, hydrogel-interlayer Radio-Frequency (RF) resonator is demonstrated as a highly-responsive, passive and wireless sensor for glucose monitoring. Constructs are composed of unanchored, capacitively-coupled split rings interceded by glucose-responsive hydrogels. Phenylboronic acid-hydrogels exhibit volumetric and dielectric variations in response to environmental glucose concentrations-these are efficiently converted to large shifts in the resonant response of interlayer-RF sensors. These tiny, stretchable and scalable sensors (5 mm × 5 mm x 250 μm) require no microelectronics or power at the sensing node and can be read-out remotely via near-field coupling. Sensors exhibit high sensitivities (~10% shift in resonant frequency-corresponding to 50 MHz-per 150 mg/dL of glucose), possess a limit of detection of 10 mg/dL, and a step response time of approximately 1 h to abrupt shifts in carbohydrate concentration. Notably, these sensors exhibited no signal drift or hysteresis over the time periods characterized herein (45 days at room temperature). We transform sensors into bioelectronic RF reporter-tags via the attachment of a single LED-these remotely report on glucose concentration via emitted light. We anticipate the non-degradative, long-term nature of both RF read-out and phenylboronic acid-based hydrogels will enable biosensors capable of long-term, remote read-out of glucose.
Collapse
Affiliation(s)
- Manik Dautta
- Department of Electrical Engineering and Computer Science, University of California Irvine, Engineering Hall #3110, Irvine, CA, 92697, USA
| | - Muhannad Alshetaiwi
- Department of Electrical Engineering and Computer Science, University of California Irvine, Engineering Hall #3110, Irvine, CA, 92697, USA
| | - Jens Escobar
- Department of Biomedical Engineering, University of California Irvine, Engineering Hall #3110, Irvine, CA, 92697, USA
| | - Peter Tseng
- Department of Electrical Engineering and Computer Science, University of California Irvine, Engineering Hall #3110, Irvine, CA, 92697, USA; Department of Biomedical Engineering, University of California Irvine, Engineering Hall #3110, Irvine, CA, 92697, USA.
| |
Collapse
|
16
|
Onaciu A, Munteanu RA, Moldovan AI, Moldovan CS, Berindan-Neagoe I. Hydrogels Based Drug Delivery Synthesis, Characterization and Administration. Pharmaceutics 2019; 11:E432. [PMID: 31450869 PMCID: PMC6781314 DOI: 10.3390/pharmaceutics11090432] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/02/2019] [Accepted: 08/12/2019] [Indexed: 02/06/2023] Open
Abstract
Hydrogels represent 3D polymeric networks specially designed for various medical applications. Due to their porous structure, they are able to swollen and to entrap large amounts of therapeutic agents and other molecules. In addition, their biocompatibility and biodegradability properties, together with a controlled release profile, make hydrogels a potential drug delivery system. In vivo studies have demonstrated their effectiveness as curing platforms for various diseases and affections. In addition, the results of the clinical trials are very encouraging and promising for the use of hydrogels as future target therapy strategies.
Collapse
Affiliation(s)
- Anca Onaciu
- Medfuture-Research Center for Advanced Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Marinescu 23/Pasteur 4-6 Street, 400337 Cluj-Napoca, Romania
| | - Raluca Andrada Munteanu
- Medfuture-Research Center for Advanced Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Marinescu 23/Pasteur 4-6 Street, 400337 Cluj-Napoca, Romania
| | - Alin Iulian Moldovan
- Medfuture-Research Center for Advanced Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Marinescu 23/Pasteur 4-6 Street, 400337 Cluj-Napoca, Romania
- Department of Pharmaceutical Physics-Biophysics, Faculty of Pharmacy, "Iuliu Hațieganu" University of Medicine and Pharmacy, Pasteur 6 Street, 400349 Cluj-Napoca, Romania
| | - Cristian Silviu Moldovan
- Medfuture-Research Center for Advanced Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Marinescu 23/Pasteur 4-6 Street, 400337 Cluj-Napoca, Romania
- Department of Pharmaceutical Physics-Biophysics, Faculty of Pharmacy, "Iuliu Hațieganu" University of Medicine and Pharmacy, Pasteur 6 Street, 400349 Cluj-Napoca, Romania
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Marinescu 23 Street, 400337 Cluj-Napoca, Romania
| | - Ioana Berindan-Neagoe
- Medfuture-Research Center for Advanced Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Marinescu 23/Pasteur 4-6 Street, 400337 Cluj-Napoca, Romania.
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Marinescu 23 Street, 400337 Cluj-Napoca, Romania.
- The Oncology Institute "Prof Dr Ion Chiricuța", Republicii 34-36 Street, 400015 Cluj-Napoca, Romania.
| |
Collapse
|
17
|
Wang B, Chou K, Queenan BN, Pennathur S, Bazan GC. Molecular Design of a New Diboronic Acid for the Electrohydrodynamic Monitoring of Glucose. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bing Wang
- Center for Polymers and Organic SolidsDepartment of Chemistry and BiochemistryUniversity of California Santa Barbara CA 93106 USA
| | - Kuang‐Hua Chou
- Department of Mechanical EngineeringUniversity of California Santa Barbara CA 93106 USA
| | - Bridget N. Queenan
- Department of Mechanical EngineeringUniversity of California Santa Barbara CA 93106 USA
- Quantitative BiologyHarvard University Cambridge MA 02138 USA
| | - Sumita Pennathur
- Department of Mechanical EngineeringUniversity of California Santa Barbara CA 93106 USA
| | - Guillermo C. Bazan
- Center for Polymers and Organic SolidsDepartment of Chemistry and BiochemistryUniversity of California Santa Barbara CA 93106 USA
| |
Collapse
|
18
|
Wang B, Chou KH, Queenan BN, Pennathur S, Bazan GC. Molecular Design of a New Diboronic Acid for the Electrohydrodynamic Monitoring of Glucose. Angew Chem Int Ed Engl 2019; 58:10612-10615. [PMID: 31168957 DOI: 10.1002/anie.201904595] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 05/19/2019] [Indexed: 02/01/2023]
Abstract
A new dicationic diboronic acid structure, DBA2+, was designed to exhibit good affinity (Kd ≈1 mm) and selectivity toward glucose. Binding of DBA2+ to glucose changes the pKa of DBA2+ from 9.4 to 6.3, enabling opportunities for detection of glucose at physiological pH. Proton release from DBA2+ is firmly related to glucose concentrations within the physiologically relevant range (0-30 mm), as verified by conductimetric monitoring. Negligible interference from other sugars (for example, maltose, fructose, sucrose, lactose, and galactose) was observed. These results demonstrate the potential of DBA2+ for selective, quantitative glucose sensing. The nonenzymatic strategy based on electrohydrodynamic effects may enable the development of stable, accurate, and continuous glucose monitoring platforms.
Collapse
Affiliation(s)
- Bing Wang
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Kuang-Hua Chou
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA
| | - Bridget N Queenan
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA.,Quantitative Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Sumita Pennathur
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA
| | - Guillermo C Bazan
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| |
Collapse
|
19
|
Rebelo R, Barbosa AI, Caballero D, Kwon IK, Oliveira JM, Kundu SC, Reis RL, Correlo VM. 3D biosensors in advanced medical diagnostics of high mortality diseases. Biosens Bioelectron 2019; 130:20-39. [PMID: 30716590 DOI: 10.1016/j.bios.2018.12.057] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 12/04/2018] [Accepted: 12/17/2018] [Indexed: 11/18/2022]
Abstract
Cardiovascular diseases, cancer, and diabetes are high mortality diseases, which account for almost two thirds of all deaths worldwide. Their early detection and continuous evaluation are fundamental for an improved patient prognosis and reduced socioeconomic impact. Current biosensor technologies are typically based on the analysis of whole blood samples from patients for the detection of disease-specific biomarkers. However, these technologies display serious shortcomings, such as reduced sensitivity and dynamic range, limited in vivo applicability, and lack of continuous monitoring. There is the urgent need for new diagnostic and treatment follow-up tools, which allow for the early detection of the pathology as well as for the continuous monitoring of the physiological responses to specific therapies. During the last years, a new generation of biosensor technologies with improved performance has emerged in the biomedical sector. The combination of advanced biomaterial methods, biochemical tools, and micro/nanotechnology approaches has resulted in the development of innovative three-dimensional (3D) biosensor platforms for advanced medical diagnosis. In this review, we report the most recent advances in the field of 3D biosensors for clinical applications, focusing on the diagnosis and monitoring of cardiovascular diseases, cancer, and diabetes. We discuss about their clinical performance compared to standard biosensor technologies, their implantable capability, and their integration into microfluidic devices to develop clinically-relevant models. Overall, we anticipate that 3D biosensors will drive us toward a new paradigm in medical diagnosis, resulting in real-time in vivo biosensors capable to significantly improve patient prognosis.
Collapse
Affiliation(s)
- Rita Rebelo
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associated Laboratory, Braga, Guimarães, Portugal.
| | - Ana I Barbosa
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associated Laboratory, Braga, Guimarães, Portugal.
| | - David Caballero
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associated Laboratory, Braga, Guimarães, Portugal.
| | - Il Keun Kwon
- Department of Dental Materials, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02477, Republic of Korea.
| | - Joaquim M Oliveira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associated Laboratory, Braga, Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, 4805-017 Barco, Guimarães, Portugal.
| | - Subhas C Kundu
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associated Laboratory, Braga, Guimarães, Portugal.
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associated Laboratory, Braga, Guimarães, Portugal; Department of Dental Materials, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02477, Republic of Korea; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, 4805-017 Barco, Guimarães, Portugal.
| | - Vitor M Correlo
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associated Laboratory, Braga, Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, 4805-017 Barco, Guimarães, Portugal.
| |
Collapse
|
20
|
Daikuzono CM, Delaney C, Morrin A, Diamond D, Florea L, Oliveira ON. Paper based electronic tongue - a low-cost solution for the distinction of sugar type and apple juice brand. Analyst 2019; 144:2827-2832. [PMID: 30887969 DOI: 10.1039/c8an01934g] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This work reports on a low cost microfluidic electronic tongue (e-tongue) made with carbon interdigitated electrodes, printed on paper, and coated with boronic acid-containing hydrogels. Using capacitance measurements, the e-tongue was capable of distinguishing between different types of sugars (e.g. glucose, fructose and sucrose), in addition to distinguishing between commercial brands of apple juice using a small volume of sample (6 μL). The channels of the microfluidic e-tongue were made using a wax printer, and were modified with hydrogels containing acrylamide copolymerized with 5 or 20 mol% 3-(acrylamido) phenyl boronic acid (Am-PBA), or a crosslinked homopolymeric hydrogel based on N-(2-boronobenzyl)-2-hydroxy-N,N-dimethylethan-1-aminium-3-sulfopropyl acrylate (DMA-PBA). Such hydrogels, containing a phenyl boronic acid (PBA) moiety, can bind saccharides. Combining various hydrogels of this nature in an e-tongue device enabled discrimination between apple juices, which are known to contain higher amounts of fructose compared to glucose or sucrose. Changes in capacitance were captured with impedance spectroscopy in the frequency range from 0.1 to 10 MHz for solutions with varying concentrations of glucose, fructose and sucrose (from 0 to 0.056 g mL-1). The capacitance data were treated with Principal Component Analysis (PCA) and Interactive Document Map (IDMAP), which then correlated overall sugar content from different brands of apple juice. This low-cost, easy-to-use, disposable e-tongue offers great potential in the routine analysis of food and beverages, while offering comparative performance to alternatives in the literature.
Collapse
Affiliation(s)
- Cristiane M Daikuzono
- São Carlos Institute of Physics, University of São Paulo, CP 369, 13560-970, São Carlos, Brazil.
| | | | | | | | | | | |
Collapse
|
21
|
Low-Cost Microfluidic Sensors with Smart Hydrogel Patterned Arrays Using Electronic Resistive Channel Sensing for Readout. Gels 2018; 4:gels4040084. [PMID: 30674860 PMCID: PMC6318584 DOI: 10.3390/gels4040084] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/03/2018] [Accepted: 10/09/2018] [Indexed: 11/17/2022] Open
Abstract
There is a strong commercial need for inexpensive point-of-use sensors for monitoring disease biomarkers or environmental contaminants in drinking water. Point-of-use sensors that employ smart polymer hydrogels as recognition elements can be tailored to detect almost any target analyte, but often suffer from long response times. Hence, we describe here a fabrication process that can be used to manufacture low-cost point-of-use hydrogel-based microfluidics sensors with short response times. In this process, mask-templated UV photopolymerization is used to produce arrays of smart hydrogel pillars inside sub-millimeter channels located upon microfluidics devices. When these pillars contact aqueous solutions containing a target analyte, they swell or shrink, thereby changing the resistance of the microfluidic channel to ionic current flow when a small bias voltage is applied to the system. Hence resistance measurements can be used to transduce hydrogel swelling changes into electrical signals. The only instrumentation required is a simple portable potentiostat that can be operated using a smartphone or a laptop, thus making the system suitable for point of use. Rapid hydrogel response rate is achieved by fabricating arrays of smart hydrogels that have large surface area-to-volume ratios.
Collapse
|
22
|
Fawole OC, Dolai S, Leu HY, Magda J, Tabib-Azar M. Remote Microwave and Field-Effect Sensing Techniques for Monitoring Hydrogel Sensor Response. MICROMACHINES 2018; 9:E526. [PMID: 30424459 PMCID: PMC6215261 DOI: 10.3390/mi9100526] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/05/2018] [Accepted: 10/11/2018] [Indexed: 11/21/2022]
Abstract
This paper presents two novel techniques for monitoring the response of smart hydrogels composed of synthetic organic materials that can be engineered to respond (swell or shrink, change conductivity and optical properties) to specific chemicals, biomolecules or external stimuli. The first technique uses microwaves both in contact and remote monitoring of the hydrogel as it responds to chemicals. This method is of great interest because it can be used to non-invasively monitor the response of subcutaneously implanted hydrogels to blood chemicals such as oxygen and glucose. The second technique uses a metal-oxide-hydrogel field-effect transistor (MOHFET) and its associated current-voltage characteristics to monitor the hydrogel's response to different chemicals. MOHFET can be easily integrated with on-board telemetry electronics for applications in implantable biosensors or it can be used as a transistor in an oscillator circuit where the oscillation frequency of the circuit depends on the analyte concentration.
Collapse
Affiliation(s)
| | - Subhashish Dolai
- Electrical and Computer Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| | - Hsuan-Yu Leu
- Chemical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| | - Jules Magda
- Chemical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| | - Massood Tabib-Azar
- Electrical and Computer Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
- Bio Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| |
Collapse
|
23
|
Kim A, Lee H, Jones CF, Mujumdar SK, Gu Y, Siegel RA. Swelling, Mechanics, and Thermal/Chemical Stability of Hydrogels Containing Phenylboronic Acid Side Chains. Gels 2017; 4:gels4010004. [PMID: 30674779 PMCID: PMC6318662 DOI: 10.3390/gels4010004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 12/14/2017] [Accepted: 12/20/2017] [Indexed: 11/16/2022] Open
Abstract
We report here studies of swelling, mechanics, and thermal stability of hydrogels consisting of 20 mol % methacrylamidophenylboronic acid (MPBA) and 80 mol % acrylamide (AAm), lightly crosslinked with methylenebisacrylamide (Bis). Swelling was measured in solutions of fixed ionic strength, but with varying pH values and fructose concentrations. Mechanics was studied by compression and hold. In the absence of sugar or in the presence of fructose, the modulus was mostly maintained during the hold period, while a significant stress relaxation was seen in the presence of glucose, consistent with reversible, dynamic crosslinks provided by glucose, but not fructose. Thermal stability was determined by incubating hydrogels at pH 7.4 at room temperature, and 37, 50, and 65 °C, and monitoring swelling. In PBS (phosphate buffered saline) solutions containing 9 mM fructose, swelling remained essentially complete for 50 days at room temperature, but decreased substantially with time at the higher temperatures, with accelerated reduction of swelling with increasing temperature. Controls indicated that over long time periods, both the MPBA and AAm units were experiencing conversion to different species.
Collapse
Affiliation(s)
- Arum Kim
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Heelim Lee
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Clinton F Jones
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Siddharthya K Mujumdar
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Yuandong Gu
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Ronald A Siegel
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA.
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA.
| |
Collapse
|
24
|
Sharifzadeh G, Hosseinkhani H. Biomolecule-Responsive Hydrogels in Medicine. Adv Healthc Mater 2017; 6. [PMID: 29057617 DOI: 10.1002/adhm.201700801] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/17/2017] [Indexed: 12/19/2022]
Abstract
Recent advances and applications of biomolecule-responsive hydrogels, namely, glucose-responsive hydrogels, protein-responsive hydrogels, and nucleic-acid-responsive hydrogels are highlighted. However, achieving the ultimate purpose of using biomolecule-responsive hydrogels in preclinical and clinical areas is still at the very early stage and calls for more novel designing concepts and advance ideas. On the way toward the real/clinical application of biomolecule-responsive hydrogels, plenty of factors should be extensively studied and examined under both in vitro and in vivo conditions. For example, biocompatibility, biointegration, and toxicity of biomolecule-responsive hydrogels should be carefully evaluated. From the living body's point of view, biocompatibility is seriously depended on the interactions at the tissue/polymer interface. These interactions are influenced by physical nature, chemical structure, surface properties, and degradation of the materials. In addition, the developments of advanced hydrogels with tunable biological and mechanical properties which cause no/low side effects are of great importance.
Collapse
Affiliation(s)
- Ghorbanali Sharifzadeh
- Department of Polymer Engineering; Faculty of Chemical Engineering; Universiti Teknologi Malaysia; 81310 Johor Malaysia
| | | |
Collapse
|
25
|
Liu DE, Dursch TJ, Taylor NO, Chan SY, Bregante DT, Radke CJ. Diffusion of water-soluble sorptive drugs in HEMA/MAA hydrogels. J Control Release 2016; 239:242-8. [PMID: 27565214 DOI: 10.1016/j.jconrel.2016.08.025] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/21/2016] [Accepted: 08/22/2016] [Indexed: 11/19/2022]
Abstract
We measure and, for the first time, theoretically predict four prototypical aqueous-drug diffusion coefficients in five soft-contact-lens material hydrogels where solute-specific adsorption is pronounced. Two-photon fluorescence confocal microscopy and UV/Vis-absorption spectrophotometry assess transient solute concentration profiles and concentration histories, respectively. Diffusion coefficients are obtained for acetazolamide, riboflavin, sodium fluorescein, and theophylline in 2-hydroxyethyl methacrylate/methacrylic acid (HEMA/MAA) copolymer hydrogels as functions of composition, equilibrium water content (30-90%), and aqueous pH (2 and 7.4). At pH2, MAA chains are nonionic, whereas at pH7.4, MAA chains are anionic (pKa≈5.2). All studied prototypical drugs specifically interact with HEMA and nonionic MAA (at pH2) moieties. Conversely, none of the prototypical drugs adsorb specifically to anionic MAA (at pH7.4) chains. As expected, diffusivities of adsorbing solutes are significantly diminished by specific interactions with hydrogel strands. Despite similar solute size, relative diffusion coefficients in the hydrogels span several orders of magnitude because of varying degrees of solute interactions with hydrogel-polymer chains. To provide a theoretical framework for the new diffusion data, we apply an effective-medium model extended for solute-specific interactions with hydrogel copolymer strands. Sorptive-diffusion kinetics is successfully described by local equilibrium and Henry's law. All necessary parameters are determined independently. Predicted diffusivities are in good agreement with experiment.
Collapse
Affiliation(s)
- D E Liu
- Chemical and Biomolecular Engineering Department, University of California, Berkeley, CA 94720, United States
| | - T J Dursch
- Chemical and Biomolecular Engineering Department, University of California, Berkeley, CA 94720, United States
| | - N O Taylor
- Chemical and Biomolecular Engineering Department, University of California, Berkeley, CA 94720, United States
| | - S Y Chan
- Chemical and Biomolecular Engineering Department, University of California, Berkeley, CA 94720, United States
| | - D T Bregante
- Chemical and Biomolecular Engineering Department, University of California, Berkeley, CA 94720, United States
| | - C J Radke
- Chemical and Biomolecular Engineering Department, University of California, Berkeley, CA 94720, United States; Vision Science Group, University of California, Berkeley, CA 94720, United States.
| |
Collapse
|
26
|
Lee J, Ko S, Kwon CH, Lima MD, Baughman RH, Kim SJ. Carbon Nanotube Yarn-Based Glucose Sensing Artificial Muscle. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:2085-91. [PMID: 26929006 DOI: 10.1002/smll.201503509] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/20/2016] [Indexed: 05/19/2023]
Abstract
Boronic acid (BA), known to be a reversible glucose-sensing material, is conjugated to a nanogel (NG) derived from hyaluronic acid biopolymer and used as a guest material for a carbon multiwalled nanotube (MWNT) yarn. By exploiting the swelling/deswelling of the NG that originates from the internal anionic charge changes resulting from BA binding to glucose, a NG MWNT yarn artificial muscle is obtained that provides reversible torsional actuation that can be used for glucose sensing. This actuator shows a short response time and high sensitivity (in the 5-100 × 10(-3) m range) for monitoring changes in glucose concentration in physiological buffer, without using any additional auxiliary substances or an electrical power source. It may be possible to apply the glucose-sensing MWNT yarn muscles as implantable glucose sensors that automatically release drugs when needed or as an artificial pancreas.
Collapse
Affiliation(s)
- Junghan Lee
- Center for Self-Powered Actuation Department of Biomedical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Sachan Ko
- Center for Self-Powered Actuation Department of Biomedical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Cheong Hoon Kwon
- Center for Self-Powered Actuation Department of Biomedical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Márcio D Lima
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, 800 West Campbell Road, Richardson, TX, 75080, USA
| | - Ray H Baughman
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, 800 West Campbell Road, Richardson, TX, 75080, USA
| | - Seon Jeong Kim
- Center for Self-Powered Actuation Department of Biomedical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| |
Collapse
|
27
|
Brooks WLA, Sumerlin BS. Synthesis and Applications of Boronic Acid-Containing Polymers: From Materials to Medicine. Chem Rev 2015; 116:1375-97. [DOI: 10.1021/acs.chemrev.5b00300] [Citation(s) in RCA: 552] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- William L. A. Brooks
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Brent S. Sumerlin
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| |
Collapse
|
28
|
Siegel RA. Stimuli sensitive polymers and self regulated drug delivery systems: a very partial review. J Control Release 2014; 190:337-51. [PMID: 24984012 PMCID: PMC4142101 DOI: 10.1016/j.jconrel.2014.06.035] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 06/18/2014] [Accepted: 06/21/2014] [Indexed: 10/25/2022]
Abstract
Since the early days of the Journal of Controlled Release, there has been considerable interest in materials that can release drug on an "on-demand" basis. So called "stimuli-responsive" and "intelligent" systems have been designed to deliver drug at various times or at various sites in the body, according to a stimulus that is either endogenous or externally applied. In the past three decades, research along these lines has taken numerous directions, and each new generation of investigators has discovered new physicochemical principles and chemical schemes by which the release properties of materials can be altered. No single review could possibly do justice to all of these approaches. In this article, some general observations are made, and a partial history of the field is presented. Both open loop and closed loop systems are discussed. Special emphasis is placed on stimuli-responsive hydrogels, and on systems that can respond repeatedly. It is argued that the most success at present and in the foreseeable future is with systems in which biosensing and actuation (i.e. drug delivery) are separated, with a human and/or cybernetic operator linking the two.
Collapse
Affiliation(s)
- Ronald A Siegel
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455 USA; Department Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455 USA.
| |
Collapse
|
29
|
Fabrication and Testing of an Osmotic Pressure Sensor for Glucose Sensing Application. MICROMACHINES 2014. [DOI: 10.3390/mi5030722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
30
|
|
31
|
Cho SH, Tathireddy P, Rieth L, Magda J. Effect of chemical composition on the response of zwitterionic glucose sensitive hydrogels studied by design of experiments. J Appl Polym Sci 2014. [DOI: 10.1002/app.40667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Seung-Hei Cho
- Department of Chemical Engineering; University of Utah; Salt Lake City Utah 84112
| | - Prashant Tathireddy
- Department of Electrical and Computer Engineering; University of Utah; Salt Lake City Utah
| | - Loren Rieth
- Department of Electrical and Computer Engineering; University of Utah; Salt Lake City Utah
| | - Jules Magda
- Department of Chemical Engineering; University of Utah; Salt Lake City Utah 84112
| |
Collapse
|
32
|
Kotanen CN, Guiseppi-Elie A. Monitoring systems and quantitative measurement of biomolecules for the management of trauma. Biomed Microdevices 2014; 15:561-77. [PMID: 23494594 DOI: 10.1007/s10544-013-9756-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Continued high morbidity and complications due to trauma related hemorrhage underscores the fact that our understanding of the detailed molecular events of trauma are inadequate to bring life-saving changes to practice. The current state of efficacy and advances in biomedical microdevice technology for trauma diagnostics concerning hemorrhage and hemorrhagic shock was considered with respect to vital signs and metabolic biomarkers. Tachycardia and hypotension are markers of hemorrhagic shock in decompensated trauma patients. Base deficit has been predicative of injury severity at hospital admission. Tissue oxygen saturation has been predicative of onset of multiple organ dysfunction syndrome. Blood potassium levels increase with onset of hemorrhagic shock. Lactate is a surrogate for tissue hypoxia and its clearance predicts mortality. Triage glucose measurements have been shown to be specific in predicting major injuries. No vital sign has yet to be proven effective as an independent predictor of trauma severity. Point of care (POC) devices allow for rapid results, easy sample preparation and processing, small sample volumes, small footprint, multifunctional analysis, and low cost. Advances in the field of in-vivo biosensors has provided a much needed platform by which trauma related metabolites can be monitored easily, rapidly and continuously. Multi-analyte monitoring biosensors have the potential to explore areas still undiscovered in the realm of trauma physiology.
Collapse
Affiliation(s)
- Christian N Kotanen
- Center for Bioelectronics, Biosensors and Biochips, Clemson University Advanced Materials Center, 100 Technology Drive, Anderson, SC 29625, USA.
| | | |
Collapse
|
33
|
Effects of gamma rays and neutron irradiation on the glucose response of boronic acid-containing “smart” hydrogels. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2013.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
34
|
|
35
|
An Improved Design for Chemomechanical Sensors: A Piezoresistive Pressure Sensor with a Mechanical Boss. CHEMOSENSORS 2013. [DOI: 10.3390/chemosensors1030033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
36
|
Döring A, Birnbaum W, Kuckling D. Responsive hydrogels--structurally and dimensionally optimized smart frameworks for applications in catalysis, micro-system technology and material science. Chem Soc Rev 2013; 42:7391-420. [PMID: 23677178 DOI: 10.1039/c3cs60031a] [Citation(s) in RCA: 252] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Although the technological and scientific importance of functional polymers has been well established over the last few decades, the most recent focus that has attracted much attention has been on stimuli-responsive polymers. This group of materials is of particular interest due to its ability to respond to internal and/or external chemico-physical stimuli, which is often manifested as large macroscopic responses. Aside from scientific challenges of designing stimuli-responsive polymers, the main technological interest lies in their numerous applications ranging from catalysis through microsystem technology and chemomechanical actuators to sensors that have been extensively explored. Since the phase transition phenomenon of hydrogels is theoretically well understood advanced materials based on the predictions can be prepared. Since the volume phase transition of hydrogels is a diffusion-limited process the size of the synthesized hydrogels is an important factor. Consistent downscaling of the gel size will result in fast smart gels with sufficient response times. In order to apply smart gels in microsystems and sensors, new preparation techniques for hydrogels have to be developed. For the up-coming nanotechnology, nano-sized gels as actuating materials would be of great interest.
Collapse
Affiliation(s)
- Artjom Döring
- Chemistry Department, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany
| | | | | |
Collapse
|
37
|
Abstract
Bioresponsive hydrogels are emerging with technological significance in targeted drug delivery, biosensors, and regenerative medicine. Their ability to respond to specific biologically derived stimuli creates a design challenge in effectively linking the conferred biospecificity with an engineered response tailored to the needs of a particular application. Moreover, the fundamental phenomena governing the response must support an appropriate dynamic range, limit of detection, and the potential for feedback control. The design of these systems is inherently complicated due to the high interdependency of the governing phenomena that guide sensing, transduction, and actuation of the hydrogel. Future advancements in bioresponsive hydrogels will out of necessity contain control loops similar to synthetic metabolic pathways. The use of these materials will continue to expand as they become coupled and integrated with new technologies.
Collapse
|
38
|
Guan Y, Zhang Y. Boronic acid-containing hydrogels: synthesis and their applications. Chem Soc Rev 2013; 42:8106-21. [DOI: 10.1039/c3cs60152h] [Citation(s) in RCA: 313] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
39
|
Lin G, Tarasevich B. Photopolymerized hydrogel composites from poly(ethylene glycol) and hydroxyapatite for controlled protein deliveryin vitro. J Appl Polym Sci 2012. [DOI: 10.1002/app.38560] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
40
|
Abstract
With the rapid development of micro systems technology and microelectronics, smart implantable wireless electronic systems are emerging for the continuous surveillance of relevant parameters in the body and even for closed-loop systems with a sensor feed-back to drug release systems. With respect to diabetes management, there is a critical societal need for a fully integrated sensor array that can be used to continuously measure a patient’s blood glucose concentration, pH, pCO2 and colloid oncotic pressure twenty four hours a day on a long-term basis. In this work, thin films of metabolite-specific or “smart” hydrogels were combined with microfabricated piezoresistive pressure transducers to obtain “chemomechanical sensors” that can serve as selective and versatile wireless biomedical sensors and sensor arrays for a continuous monitoring of several metabolites. Sensor response time and accuracy with which sensors can track gradual changes in glucose, pH, CO2 and ionic strength, respectively, was estimated in vitro using simulated physiological solutions. The biocompatibility and hermeticity of the developed multilayer encapsulation for the microsensor array has been investigated concerning the long-term stability and enduring functionality that is desired for permanent implants.
Collapse
|
41
|
Horkay F, Cho SH, Tathireddy P, Rieth L, Solzbacher F, Magda J. Thermodynamic Analysis of the Selectivity Enhancement Obtained by Using Smart Hydrogels That Are Zwitterionic When Detecting Glucose With Boronic Acid Moieties. SENSORS AND ACTUATORS. B, CHEMICAL 2011; 160:1363-1371. [PMID: 22190765 PMCID: PMC3242003 DOI: 10.1016/j.snb.2011.09.079] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Because the boronic acid moiety reversibly binds to sugar molecules and has low cytotoxicity, boronic acid-containing hydrogels are being used in a variety of implantable glucose sensors under development, including sensors based on optical, fluorescence, and swelling pressure measurements. However, some method of glucose selectivity enhancement is often necessary, because isolated boronic acid molecules have a binding constant with glucose that is some forty times smaller than their binding constant with fructose, the second most abundant sugar in the human body. In many cases, glucose selectivity enhancement is obtained by incorporating pendant tertiary amines into the hydrogel network, thereby giving rise to a hydrogel that is zwitterionic at physiological pH. However, the mechanism by which incorporation of tertiary amines confers selectivity enhancement is poorly understood. In order to clarify this mechanism, we use the osmotic deswelling technique to compare the thermodynamic interactions of glucose and fructose with a zwitterionic smart hydrogel containing boronic acid moieties. We also investigate the change in the structure of the hydrogel that occurs when it binds to glucose or to fructose using the technique of small angle neutron scattering.
Collapse
Affiliation(s)
- F. Horkay
- Section on Tissue Biophysics and Biomimetics, Program on Pediatric Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892-5772 USA
| | - S. H. Cho
- Department of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112 USA
| | - P. Tathireddy
- Department of Electrical & Computer Engineering, University of Utah, Salt Lake City, Utah 84112 USA
| | - L. Rieth
- Department of Electrical & Computer Engineering, University of Utah, Salt Lake City, Utah 84112 USA
| | - F. Solzbacher
- Department of Electrical & Computer Engineering, University of Utah, Salt Lake City, Utah 84112 USA
- Department of Materials Science & Engineering, University of Utah, Salt Lake City, Utah 84112 USA
- Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112 USA
| | - J. Magda
- Department of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112 USA
- Department of Materials Science & Engineering, University of Utah, Salt Lake City, Utah 84112 USA
| |
Collapse
|
42
|
Krushinitskaya O, Tønnessen TI, Jakobsen H, Johannessen E. The assessment of potentially interfering metabolites and dietary components in blood using an osmotic glucose sensor based on the concanavalin A–dextran affinity assay. Biosens Bioelectron 2011; 28:195-203. [DOI: 10.1016/j.bios.2011.07.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 07/07/2011] [Accepted: 07/09/2011] [Indexed: 02/01/2023]
|
43
|
Characterization of nanoporous membranes for implementation in an osmotic glucose sensor based on the concanavalin A–dextran affinity assay. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
44
|
Tathireddy P, Avula M, Lin G, Cho SH, Guenther M, Schulz V, Gerlach G, Magda JJ, Solzbacher F. Smart hydrogel based microsensing platform for continuous glucose monitoring. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2011; 2010:677-9. [PMID: 21095892 DOI: 10.1109/iembs.2010.5626231] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In this paper, we present preliminary results showing the response of glucose-sensitive hydrogels, confined in micro-pressure sensors, to the changes in environmental glucose concentration. The glucose concentrations were incrementally varied between 20 and 0mM in 0.15M PBS solution at 7.4 pH and bovine serum at 7.4 pH at room temperature and response of the sensor was recorded. The micro sensors demonstrate a response time of 10 minutes in both PBS and serum. Tissue response after 55 days of subcutaneous implantation of a EtO sterilized sensor in mice is presented. The preliminary analysis of the surrounding tissue shows inflammation which is believed not to interfere with the sensor performance.
Collapse
Affiliation(s)
- Prashant Tathireddy
- Department of Electrical and Computer Engineering at the University of Utah, Salt Lake City, UT 84112, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Fomina N, McFearin CL, Sermsakdi M, Morachis JM, Almutairi A. Low power, biologically benign NIR light triggers polymer disassembly. Macromolecules 2011; 44:8590-8597. [PMID: 22096258 PMCID: PMC3215095 DOI: 10.1021/ma201850q] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Near infrared (NIR) irradiation can penetrate up to 10 cm deep into tissues and be remotely applied with high spatial and temporal precision. Despite its potential for various medical and biological applications, there is a dearth of biomaterials that are responsive at this wavelength region. Herein we report a polymeric material that is able to disassemble in response to biologically benign levels of NIR irradiation upon two-photon absorption. The design relies on the photolysis of the multiple pendant 4-bromo7-hydroxycoumarin protecting groups to trigger a cascade of cyclization and rearrangement reactions leading to the degradation of the polymer backbone. The new material undergoes a 50% Mw loss after 25 sec of ultraviolet (UV) irradiation by single photon absorption and 21 min of NIR irradiation via two-photon absorption. Most importantly, even NIR irradiation at biologically benign laser power is sufficient to cause significant polymer disassembly. Furthermore, this material is well tolerated by cells both before and after degradation. These results demonstrate for the first time a NIR sensitive material with potential to be used for in vivo applications.
Collapse
Affiliation(s)
- Nadezda Fomina
- Skaggs School Pharmacy and Pharmaceutical Sciences, Department of NanoEngineering, Materials Science and Engineering and Biomedical Sciences Programs, University of California at San Diego, La Jolla, California 92093
| | - Cathryn L. McFearin
- Skaggs School Pharmacy and Pharmaceutical Sciences, Department of NanoEngineering, Materials Science and Engineering and Biomedical Sciences Programs, University of California at San Diego, La Jolla, California 92093
| | - Marleen Sermsakdi
- Skaggs School Pharmacy and Pharmaceutical Sciences, Department of NanoEngineering, Materials Science and Engineering and Biomedical Sciences Programs, University of California at San Diego, La Jolla, California 92093
| | - José M. Morachis
- Skaggs School Pharmacy and Pharmaceutical Sciences, Department of NanoEngineering, Materials Science and Engineering and Biomedical Sciences Programs, University of California at San Diego, La Jolla, California 92093
| | - Adah Almutairi
- Skaggs School Pharmacy and Pharmaceutical Sciences, Department of NanoEngineering, Materials Science and Engineering and Biomedical Sciences Programs, University of California at San Diego, La Jolla, California 92093
| |
Collapse
|
46
|
Gawel K, Barriet D, Sletmoen M, Stokke BT. Responsive hydrogels for label-free signal transduction within biosensors. SENSORS (BASEL, SWITZERLAND) 2010; 10:4381-409. [PMID: 22399885 PMCID: PMC3292124 DOI: 10.3390/s100504381] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 04/12/2010] [Accepted: 04/23/2010] [Indexed: 11/18/2022]
Abstract
Hydrogels have found wide application in biosensors due to their versatile nature. This family of materials is applied in biosensing either to increase the loading capacity compared to two-dimensional surfaces, or to support biospecific hydrogel swelling occurring subsequent to specific recognition of an analyte. This review focuses on various principles underpinning the design of biospecific hydrogels acting through various molecular mechanisms in transducing the recognition event of label-free analytes. Towards this end, we describe several promising hydrogel systems that when combined with the appropriate readout platform and quantitative approach could lead to future real-life applications.
Collapse
Affiliation(s)
- Kamila Gawel
- Biophysics and Medical Technology, Department of Physics, The Norwegian University of Science and Technology, NTNU NO-7491 Trondheim, Norway; E-Mails: (K.G.); (D.B.); (M.S.)
| | - David Barriet
- Biophysics and Medical Technology, Department of Physics, The Norwegian University of Science and Technology, NTNU NO-7491 Trondheim, Norway; E-Mails: (K.G.); (D.B.); (M.S.)
- NTNU NanoLab, The Norwegian University of Science and Technology, NTNU NO-7491 Trondheim, Norway
| | - Marit Sletmoen
- Biophysics and Medical Technology, Department of Physics, The Norwegian University of Science and Technology, NTNU NO-7491 Trondheim, Norway; E-Mails: (K.G.); (D.B.); (M.S.)
| | - Bjørn Torger Stokke
- Biophysics and Medical Technology, Department of Physics, The Norwegian University of Science and Technology, NTNU NO-7491 Trondheim, Norway; E-Mails: (K.G.); (D.B.); (M.S.)
| |
Collapse
|