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Tsukada H, Wako M, Ueda S, Nagamine K. Touchpad-based immunochromatographic strip for detecting the skin surface proteins. Anal Biochem 2024; 692:115575. [PMID: 38796117 DOI: 10.1016/j.ab.2024.115575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 05/28/2024]
Abstract
This study demonstrates, for the first time, the proof-of-concept of a novel immunosensor, a touchpad-based immunochromatographic strip, that non-invasively extracts and detects skin surface proteins. The strip was composed of a nitrocellulose membrane at the center, where a spot of anti-human IgG capture antibody was physically adsorbed. The capture antibody spot was covered with a glass fiber membrane impregnated with phosphate-buffered saline (PBS) to extract skin surface proteins, avoiding direct contact of the human skin with the capture antibodies. Skin surface IgG was detected in two steps: (1) touching the capture antibody via a glass fiber membrane containing PBS, and (2) dipping the strip into the Au-nanoparticle-labeled secondary antibody to visualize the existence of the captured skin surface IgG on the strip. We qualitatively demonstrated that using a very small amount of PBS while maintaining contact with the skin, skin surface proteins can be concentrated and detected, even with a relatively low-sensitivity immunochromatographic chip. This sensor is expected to be a potential biosensor for the non-invasive diagnosis of the integrity of human skin.
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Affiliation(s)
- Hyugo Tsukada
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, 992-8510, Yonezawa, Yamagata, Japan
| | - Mai Wako
- Faculty of Engineering, Department of Polymeric and Organic Materials Engineering, Yamagata University, 4-3-16 Jonan, 992-8510, Yonezawa, Yamagata, Japan
| | - Syunsuke Ueda
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, 992-8510, Yonezawa, Yamagata, Japan
| | - Kuniaki Nagamine
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, 992-8510, Yonezawa, Yamagata, Japan; Faculty of Engineering, Department of Polymeric and Organic Materials Engineering, Yamagata University, 4-3-16 Jonan, 992-8510, Yonezawa, Yamagata, Japan.
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Liu Y, Li J, Xiao S, Liu Y, Bai M, Gong L, Zhao J, Chen D. Revolutionizing Precision Medicine: Exploring Wearable Sensors for Therapeutic Drug Monitoring and Personalized Therapy. BIOSENSORS 2023; 13:726. [PMID: 37504123 PMCID: PMC10377150 DOI: 10.3390/bios13070726] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/02/2023] [Accepted: 07/08/2023] [Indexed: 07/29/2023]
Abstract
Precision medicine, particularly therapeutic drug monitoring (TDM), is essential for optimizing drug dosage and minimizing toxicity. However, current TDM methods have limitations, including the need for skilled operators, patient discomfort, and the inability to monitor dynamic drug level changes. In recent years, wearable sensors have emerged as a promising solution for drug monitoring. These sensors offer real-time and continuous measurement of drug concentrations in biofluids, enabling personalized medicine and reducing the risk of toxicity. This review provides an overview of drugs detectable by wearable sensors and explores biosensing technologies that can enable drug monitoring in the future. It presents a comparative analysis of multiple biosensing technologies and evaluates their strengths and limitations for integration into wearable detection systems. The promising capabilities of wearable sensors for real-time and continuous drug monitoring offer revolutionary advancements in diagnostic tools, supporting personalized medicine and optimal therapeutic effects. Wearable sensors are poised to become essential components of healthcare systems, catering to the diverse needs of patients and reducing healthcare costs.
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Affiliation(s)
- Yuqiao Liu
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Junmin Li
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Shenghao Xiao
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Yanhui Liu
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Mingxia Bai
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Lixiu Gong
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Jiaqian Zhao
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Dajing Chen
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
- College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310007, China
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Nagamine K, Nomura A, Ichimura Y, Izawa R, Sasaki S, Furusawa H, Matsui H, Tokito S. Printed Organic Transistor-based Biosensors for Non-invasive Sweat Analysis. ANAL SCI 2020; 36:291-302. [PMID: 31904007 DOI: 10.2116/analsci.19r007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 12/25/2019] [Indexed: 08/09/2023]
Abstract
This review describes recent advances in biosensors for non-invasive human healthcare applications, especially focusing on sweat analysis, along with approaches for fabricating these biosensors based on printed electronics technology. Human sweat contains various kinds of biomarkers. The relationship between a trace amount of sweat biomarkers partially partitioned from blood and diseases has been investigated by omic analysis. Recent progress in wearable or portable biosensors has enabled periodic or continuous monitoring of some sweat biomarkers while supporting the results of the omic analysis. In this review, we particularly focused on a transistor-based biosensor that is highly sensitive in quantitatively detecting the low level of sweat biomarkers. Furthermore, we showed a new approach of flexible hybrid electronics that has been applied to advanced sweat biosensors to realize fully integrated biosensing systems wirelessly connected to a networked IoT system. These technologies are based on uniquely advanced printing techniques that will facilitate mass fabrication of high-performance biosensors at low cost for future smart healthcare.
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Affiliation(s)
- Kuniaki Nagamine
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.
| | - Ayako Nomura
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Yusuke Ichimura
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Ryota Izawa
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Shiori Sasaki
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Hiroyuki Furusawa
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Hiroyuki Matsui
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Shizuo Tokito
- Research Center for Organic Electronics (REOL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.
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Nagamine K, Mano T, Nomura A, Ichimura Y, Izawa R, Furusawa H, Matsui H, Kumaki D, Tokito S. Noninvasive Sweat-Lactate Biosensor Emplsoying a Hydrogel-Based Touch Pad. Sci Rep 2019; 9:10102. [PMID: 31300711 PMCID: PMC6626002 DOI: 10.1038/s41598-019-46611-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/02/2019] [Indexed: 12/27/2022] Open
Abstract
This study is the first report demonstrating proof-of-concept for a hydrogel-based touch sensor pad used for the non-invasive extraction and detection of sweat components. The sensor device was composed of an electrochemical L-lactate biosensor covered with an agarose gel in a phosphate buffer saline. When human skin contacts the agarose gel, L-lactate in sweat was continuously extracted into the gel, followed by in-situ potentiometric detection without controlled conditions. This novel type of sweat sensor is expected to enable the simple, non-invasive daily periodic monitoring of sweat biomarkers for advanced personal healthcare methods in the future.
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Affiliation(s)
- Kuniaki Nagamine
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.
| | - Taisei Mano
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Ayako Nomura
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Yusuke Ichimura
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Ryota Izawa
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Hiroyuki Furusawa
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Hiroyuki Matsui
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Daisuke Kumaki
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Shizuo Tokito
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.
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Tai LC, Gao W, Chao M, Bariya M, Ngo QP, Shahpar Z, Nyein HYY, Park H, Sun J, Jung Y, Wu E, Fahad HM, Lien DH, Ota H, Cho G, Javey A. Methylxanthine Drug Monitoring with Wearable Sweat Sensors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1707442. [PMID: 29663538 DOI: 10.1002/adma.201707442] [Citation(s) in RCA: 141] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/09/2018] [Indexed: 05/24/2023]
Abstract
Drug monitoring plays crucial roles in doping control and precision medicine. It helps physicians tailor drug dosage for optimal benefits, track patients' compliance to prescriptions, and understand the complex pharmacokinetics of drugs. Conventional drug tests rely on invasive blood draws. While urine and sweat are attractive alternative biofluids, the state-of-the-art methods require separate sample collection and processing steps and fail to provide real-time information. Here, a wearable platform equipped with an electrochemical differential pulse voltammetry sensing module for drug monitoring is presented. A methylxanthine drug, caffeine, is selected to demonstrate the platform's functionalities. Sweat caffeine levels are monitored under various conditions, such as drug doses and measurement time after drug intake. Elevated sweat caffeine levels upon increasing dosage and confirmable caffeine physiological trends are observed. This work leverages a wearable sweat sensing platform toward noninvasive and continuous point-of-care drug monitoring and management.
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Affiliation(s)
- Li-Chia Tai
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Wei Gao
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Minghan Chao
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Mallika Bariya
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Quynh P Ngo
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Ziba Shahpar
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Hnin Y Y Nyein
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Hyejin Park
- Department of Printed Electronics Engineering, Sunchon National University, 255 Jungang-ro, Suncheon-si, Jeollanam-do, 57922, Republic of Korea
| | - Junfeng Sun
- Department of Printed Electronics Engineering, Sunchon National University, 255 Jungang-ro, Suncheon-si, Jeollanam-do, 57922, Republic of Korea
| | - Younsu Jung
- Department of Printed Electronics Engineering, Sunchon National University, 255 Jungang-ro, Suncheon-si, Jeollanam-do, 57922, Republic of Korea
| | - Eric Wu
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Hossain M Fahad
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Der-Hsien Lien
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Hiroki Ota
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Gyoujin Cho
- Department of Printed Electronics Engineering, Sunchon National University, 255 Jungang-ro, Suncheon-si, Jeollanam-do, 57922, Republic of Korea
| | - Ali Javey
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA
- Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
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Sweat test for cystic fibrosis: Wearable sweat sensor vs. standard laboratory test. J Cyst Fibros 2018; 17:e35-e38. [PMID: 29580829 DOI: 10.1016/j.jcf.2018.03.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 03/02/2018] [Accepted: 03/02/2018] [Indexed: 11/20/2022]
Abstract
BACKGROUND Sweat chloride testing for diagnosis of cystic fibrosis (CF) involves sweat induction, collection and handling, and measurement in an analytical lab. We have developed a wearable sensor with an integrated salt bridge for real-time measurement of sweat chloride concentration. Here, in a proof-of-concept study, we compare the performance of the sensor to current clinical practice in CF patients and healthy subjects. METHOD Sweat was induced on both forearms of 10 individuals with CF and 10 healthy subjects using pilocarpine iontophoresis. A Macroduct sweat collection device was attached to one arm and sweat was collected for 30 min and then sent for laboratory analysis. A sensor was attached to the other arm and the chloride ion concentration monitored in real time for 30 min using a Bluetooth transceiver and smart phone app. RESULTS Stable sweat chloride measurements were obtained within 15 min following sweat induction using the wearable sensor. We define the detection time as the time at which the standard deviation of the real-time chloride ion concentration remained below 2 mEq/L for 5 min. The sweat volume for sensor measurements at the detection time was 13.1 ± 11.4 μL (SD), in many cases lower than the minimum sweat volume of 15 μL for conventional testing. The mean difference between sweat chloride concentrations measured by the sensor and the conventional laboratory practice was 6.2 ± 9.5 mEq/L (SD), close to the arm-to-arm variation of about 3 mEq/L. The Pearson correlation coefficient between the two measurements was 0.97 highlighting the excellent agreement between the two methods. CONCLUSION A wearable sensor can be used to make real-time measurements of sweat chloride within 15 min following sweat induction, requiring a small sweat volume, and with excellent agreement to standard methods.
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Abstract
Imagine a scenario where personal belongings such as pens, keys, phones, or handbags are found at an investigative site. It is often valuable to the investigative team that is trying to trace back the belongings to an individual to understand their personal habits, even when DNA evidence is also available. Here, we develop an approach to translate chemistries recovered from personal objects such as phones into a lifestyle sketch of the owner, using mass spectrometry and informatics approaches. Our results show that phones' chemistries reflect a personalized lifestyle profile. The collective repertoire of molecules found on these objects provides a sketch of the lifestyle of an individual by highlighting the type of hygiene/beauty products the person uses, diet, medical status, and even the location where this person may have been. These findings introduce an additional form of trace evidence from skin-associated lifestyle chemicals found on personal belongings. Such information could help a criminal investigator narrowing down the owner of an object found at a crime scene, such as a suspect or missing person.
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Dutkiewicz EP, Urban PL. Quantitative mass spectrometry of unconventional human biological matrices. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2016; 374:20150380. [PMID: 27644966 PMCID: PMC5031645 DOI: 10.1098/rsta.2015.0380] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/02/2016] [Indexed: 06/06/2023]
Abstract
The development of sensitive and versatile mass spectrometric methodology has fuelled interest in the analysis of metabolites and drugs in unconventional biological specimens. Here, we discuss the analysis of eight human matrices-hair, nail, breath, saliva, tears, meibum, nasal mucus and skin excretions (including sweat)-by mass spectrometry (MS). The use of such specimens brings a number of advantages, the most important being non-invasive sampling, the limited risk of adulteration and the ability to obtain information that complements blood and urine tests. The most often studied matrices are hair, breath and saliva. This review primarily focuses on endogenous (e.g. potential biomarkers, hormones) and exogenous (e.g. drugs, environmental contaminants) small molecules. The majority of analytical methods used chromatographic separation prior to MS; however, such a hyphenated methodology greatly limits analytical throughput. On the other hand, the mass spectrometric methods that exclude chromatographic separation are fast but suffer from matrix interferences. To enable development of quantitative assays for unconventional matrices, it is desirable to standardize the protocols for the analysis of each specimen and create appropriate certified reference materials. Overcoming these challenges will make analysis of unconventional human biological matrices more common in a clinical setting.This article is part of the themed issue 'Quantitative mass spectrometry'.
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Affiliation(s)
- Ewelina P Dutkiewicz
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Rd, Hsinchu 300, Taiwan
| | - Pawel L Urban
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Rd, Hsinchu 300, Taiwan Institute of Molecular Science, National Chiao Tung University, 1001 University Rd, Hsinchu 300, Taiwan
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Kondo S, Fujiki K, Ko SBH, Yamamoto A, Nakakuki M, Ito Y, Shcheynikov N, Kitagawa M, Naruse S, Ishiguro H. Functional characteristics of L1156F-CFTR associated with alcoholic chronic pancreatitis in Japanese. Am J Physiol Gastrointest Liver Physiol 2015; 309:G260-9. [PMID: 26089335 PMCID: PMC4537928 DOI: 10.1152/ajpgi.00015.2014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 06/09/2015] [Indexed: 01/31/2023]
Abstract
Although cystic fibrosis is rare in Japanese, measurement of sweat Cl(-) has suggested mild dysfunction of cystic fibrosis transmembrane conductance regulator (CFTR) in some patients with chronic pancreatitis. In the present study, we have investigated the association of CFTR variants and chronic pancreatitis in Japanese and the functional characteristics of a Japanese- and pancreatitis-specific CFTR variant, L1156F. Seventy patients with alcoholic chronic pancreatitis, 18 patients with idiopathic chronic pancreatitis, and 180 normal subjects participated. All exons and their boundaries and promoter region of the CFTR gene were sequenced. Human embryonic kidney-293 cells were transfected with three CFTR variants (M470V, L1156F, and M470V+L1156F), and the protein expression was examined. Xenopus laevis oocytes were injected with the CFTR variants, and bicarbonate (HCO3 (-)) transport activity was examined. CFPAC-1 cells were transfected with the CFTR variants and Cl(-)/HCO3 (-) exchange activity was examined. Six variants (E217G, I556V, M470V, L1156F, Q1352H, and R1453W) were identified in the coding region of the CFTR gene. Cystic fibrosis-causing mutations were not found. The allele frequencies of L1156F and Q1352H in alcoholic chronic pancreatitis (5.0 and 7.9%) were significantly (P < 0.01) higher than those in normal subjects (0.6 and 1.9%). L1156F was linked with a worldwide CFTR variant, M470V. Combination of M470V and L1156F significantly reduced CFTR expression to ∼60%, impaired CFTR-mediated HCO3 (-)/Cl(-) transport activity to 50-60%, and impaired CFTR-coupled Cl(-)/HCO3 (-) exchange activity to 20-30%. The data suggest that the Japanese-specific CFTR variant L1156F causes mild dysfunction of CFTR and increases the risk of alcoholic chronic pancreatitis in Japanese.
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Affiliation(s)
- Shiho Kondo
- Department of Human Nutrition, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kotoyo Fujiki
- Department of Nutrition, Nagoya University of Arts and Sciences, Nisshin, Japan
| | - Shigeru B H Ko
- Department of Systems Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Akiko Yamamoto
- Department of Human Nutrition, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Miyuki Nakakuki
- Department of Human Nutrition, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasutomo Ito
- Division for Medical Research Engineering, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nikolay Shcheynikov
- Epithelial Signaling and Transport Section, National Institute of Dental and Craniofacial Research, Bethesda, Maryland; and
| | - Motoji Kitagawa
- Department of Nutrition, Nagoya University of Arts and Sciences, Nisshin, Japan
| | | | - Hiroshi Ishiguro
- Department of Human Nutrition, Nagoya University Graduate School of Medicine, Nagoya, Japan;
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10
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Noninvasive monitoring of plasma l-dopa concentrations using sweat samples in Parkinson's disease. Clin Chim Acta 2015; 442:52-5. [DOI: 10.1016/j.cca.2014.12.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 12/21/2014] [Accepted: 12/29/2014] [Indexed: 11/20/2022]
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Talio MC, Acosta MG, Alesso M, Luconi MO, Fernández LP. Quantification of caffeine in dietary supplements and energy drinks by solid-surface fluorescence using a pre-concentration step on multi-walled carbon nanotubes and Rhodamine B. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2014; 31:1367-74. [DOI: 10.1080/19440049.2014.928831] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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12
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Talio MC, Alesso M, Acosta M, Acosta MG, Luconi MO, Fernández LP. Caffeine monitoring in biological fluids by solid surface fluorescence using membranes modified with nanotubes. Clin Chim Acta 2013; 425:42-7. [DOI: 10.1016/j.cca.2013.07.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/06/2013] [Accepted: 07/11/2013] [Indexed: 11/28/2022]
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13
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Changes in Na+, K+ concentrations in perspiration and perspiration volume with alternating current iontophoresis in palmoplantar hyperhidrosis patients. Arch Dermatol Res 2008; 300:595-600. [PMID: 18677499 DOI: 10.1007/s00403-008-0877-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Accepted: 06/26/2008] [Indexed: 10/21/2022]
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14
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Peri-Okonny UL, Wang SX, Stubbs RJ, Guzman NA. Determination of caffeine and its metabolites in urine by capillary electrophoresis-mass spectrometry. Electrophoresis 2005; 26:2652-63. [PMID: 15948212 DOI: 10.1002/elps.200500231] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The caffeine content of foods and beverages varies considerably, interfering with our ability to obtain valid interpretations in many human studies with regard to the mechanism of action(s) of caffeine and/or its metabolites. The rate of metabolism of caffeine and other xanthine drugs also varies greatly from one individual to another. Therefore, it is extremely important to develop accurate, reliable analytical methods to quantify caffeine and its metabolites in simple and complex matrixes. A simple method is described for the separation and characterization of caffeine and its major metabolites employing capillary electrophoresis (CE) coupled to ultraviolet-absorption and mass spectrometry (MS) detection. After optimization of the electrophoresis separation conditions, a reliable separation of caffeine and 11 of its major metabolites was achieved in 50 mM ammonium carbonate buffer, pH 11.0. The volatile aqueous electrolyte system used with a normal electroosmotic flow polarity also provided an optimal separation condition for the characterization of the analytes by MS. The CE method achieved baseline resolution for all 12 compounds in less than 30 min. The CE-MS method is suitable for use as a routine procedure for the rapid separation and characterization of caffeine and its metabolites. The usefulness of this method was demonstrated by the extraction, separation, and identification of caffeine and its 11 metabolites from normal urine samples. The urine specimens were first acidified to obtain optimum binding efficiency to the sorbents of the off-line, solid-phase extraction procedure employed here, and an acidified eluent solvent was employed for the desorption step to maximize the recovery of the bound analytes.
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Affiliation(s)
- Unita L Peri-Okonny
- Bioanalytical Drug Metabolism, Johnson and Johnson Pharmaceutical Research and Development, Raritan, NJ 08869, USA
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15
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Naruse S, Ishiguro H, Suzuki Y, Fujiki K, Ko SBH, Mizuno N, Takemura T, Yamamoto A, Yoshikawa T, Jin C, Suzuki R, Kitagawa M, Tsuda T, Kondo T, Hayakawa T. A finger sweat chloride test for the detection of a high-risk group of chronic pancreatitis. Pancreas 2004; 28:e80-5. [PMID: 15084988 DOI: 10.1097/00006676-200404000-00029] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
OBJECTIVES Mutations of the cystic fibrosis transmembrane conductance regulator (CFTR) gene are associated with chronic pancreatitis in Caucasians. We developed a simple method for measuring finger sweat chloride concentration to test whether CFTR dysfunction underlies chronic pancreatitis in Japan where cystic fibrosis (CF) is rare. METHODS We studied 25 patients with chronic (21 alcoholic and 4 idiopathic) pancreatitis and 25 healthy volunteers. Sweat chloride concentrations were measured by a finger sweat chloride test. We analyzed DNA for 20 common CFTR mutations in Europeans, 9 CF-causing mutations in Japanese, and 2 polymorphic loci, a poly-T tract and (TG) repeats, at intron 8. RESULTS Thirteen patients (52%) had sweat chloride levels >60 mmol/L, a level consistent with CF, while only 4 (16%) healthy subjects exceeded this level. The 29 CF mutations and the 5T allele were detected in neither the patients nor controls. The (TG) 12 allele was common in both the patients (58%) and controls (48%). The (TG) 12/12 genotype was common in alcoholic pancreatitis (29%) compared with the (TG) 11/11 (10%). Patients with the (TG) 12/12 genotype had significantly higher sweat chloride concentrations than the controls. CONCLUSION CFTR dysfunction as evidenced by a finger sweat chloride test is present in about half of Japanese patients with chronic pancreatitis, suggesting that this test may be useful for detecting the high-risk group. A higher proportion of the (TG) 12 allele may be a genetic background for elevated sweat chloride concentrations in Japanese patients.
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Affiliation(s)
- Satoru Naruse
- Department of Internal Medicine, Nagoya University Graduate School of Medicine and Nagoya Institute of Technology, Nagoya, Japan.
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SHIBATA H, TSUDA T. Analytical Chemistry related to Biofunctional Research. Determination of paraben found on skin surface of human finger. BUNSEKI KAGAKU 2002. [DOI: 10.2116/bunsekikagaku.51.397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hideki SHIBATA
- Department of Applied Chemistry, Nagoya Institute of Technology
| | - Takao TSUDA
- Department of Applied Chemistry, Nagoya Institute of Technology
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SUGASE S, TSUDA T. Analytical Chemistry related to Biofunctional Research. Determination of lactic acid, uric acid, xanthine and tyrosine in human sweat by HPLC, and the concentration variation of lactic acid in it after the intake of wine. BUNSEKI KAGAKU 2002. [DOI: 10.2116/bunsekikagaku.51.429] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Sadaharu SUGASE
- Department of Applied Chemistry, Nagoya Institute of Technology
| | - Takao TSUDA
- Department of Applied Chemistry, Nagoya Institute of Technology
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18
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Current literature in mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2001; 36:446-457. [PMID: 11333450 DOI: 10.1002/jms.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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TERASAWA J, MITSUYA K, ISHII A, TSUDA T. Analytical Chemistry for Advanced Technologies. Quantitative determination of K+, NH4+, Na+, Ca2+ and Mg2+ cations in secreted human sweat by capillary zone electrophoresis. BUNSEKI KAGAKU 2001. [DOI: 10.2116/bunsekikagaku.50.813] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Junko TERASAWA
- Department of Applied Chemistry, Nagoya Institute of Technology
| | - Kotaro MITSUYA
- Department of Applied Chemistry, Nagoya Institute of Technology
| | - Akira ISHII
- Department of Legal Medicine and Bioethics, Post Graduate School of Medicine Nagoya University
| | - Takao TSUDA
- Department of Applied Chemistry, Nagoya Institute of Technology
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