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Ding F, Guo R, Cui ZY, Hu H, Zhao G. Clinical application and research progress of extracellular slow wave recording in the gastrointestinal tract. World J Gastrointest Surg 2022; 14:544-555. [PMID: 35979419 PMCID: PMC9258241 DOI: 10.4240/wjgs.v14.i6.544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/21/2022] [Accepted: 05/17/2022] [Indexed: 02/06/2023] Open
Abstract
The physiological function of the gastrointestinal (GI) tract is based on the slow wave generated and transmitted by the interstitial cells of Cajal. Extracellular myoelectric recording techniques are often used to record the characteristics and propagation of slow wave and analyze the models of slow wave transmission under physiological and pathological conditions to further explore the mechanism of GI dysfunction. This article reviews the application and research progress of electromyography, bioelectromagnetic technology, and high-resolution mapping in animal and clinical experiments, summarizes the clinical application of GI electrical stimulation therapy, and reviews the electrophysiological research in the biliary system.
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Affiliation(s)
- Fan Ding
- Center of Gallbladder Disease, East Hospital of Tongji University, Shanghai 200120, China
- Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai 200331, China
| | - Run Guo
- Department of Ultrasonography, East Hospital of Tongji University, Shanghai 200120, China
| | - Zheng-Yu Cui
- Department of Internal Medicine of Traditional Chinese Medicine, East Hospital of Tongji University, Shanghai 200120, China
| | - Hai Hu
- Center of Gallbladder Disease, East Hospital of Tongji University, Shanghai 200120, China
- Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai 200331, China
| | - Gang Zhao
- Center of Gallbladder Disease, East Hospital of Tongji University, Shanghai 200120, China
- Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai 200331, China
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Martins ML, Pinto TS, Gomes AM, Parra JPRLL, Franchi GC, Zambuzzi WF, Rodrigues CG. Immobilization of Paclitaxel on Hydroxyapatite for Breast Cancer Investigations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:8723-8732. [PMID: 32643936 DOI: 10.1021/acs.langmuir.0c00868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A simple method for immobilization of the chemotherapy drug paclitaxel (PTX) on hydroxyapatite nanoparticles (n-HAP) using the biopolymer chitosan as a trapping agent is described focusing on applications involving breast cancer cells. n-HAP with two distinct crystallinity profiles were used: with predominant crystallization along the long axis and with a more homogeneous crystallization in all directions. In the first scenario, the interactions between chitosan and both the OH and PO43- groups on the surface of the nanoparticles are favored and lead to a more efficient attachment of the drug. In this case, PTX is found to remain mostly attached to the n-HAP for at least 24 h, while being dispersed in aqueous solution. During this time, the activity of the drug is inhibited as corroborated by in vitro assays with breast cancer cells. With that, the in vitro experiments revealed distinct effects from the drug-loaded nanoparticles on the cells depending on the experimental conditions. In a short term, that is, in 24 h, the cells exhibit higher viability than those challenged with nonloaded materials. Nevertheless, after 72 h, even a small content of PTX in the presence of n-HAP can reduce the cells' viability via stimulation of the apoptotic phenotype and suppression of survival stimuli.
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Affiliation(s)
- Murillo L Martins
- Post-Graduation Program in Industrial and Systems Engineering, Pontifical Catholic University of Goiás, Goiânia 74175-120, Goiás, Brazil
| | - Thais S Pinto
- Laboratory of Bioassays and Cellular Dynamics (LaBIO), Chemistry and Biochemistry Department, Bioscience Institute of Botucatu (IBB), State University of São Paulo (UNESP), Botucatu 18618-000, São Paulo, Brazil
| | - Anderson M Gomes
- Laboratory of Bioassays and Cellular Dynamics (LaBIO), Chemistry and Biochemistry Department, Bioscience Institute of Botucatu (IBB), State University of São Paulo (UNESP), Botucatu 18618-000, São Paulo, Brazil
| | - João P R L L Parra
- Laboratory of Bioassays and Cellular Dynamics (LaBIO), Chemistry and Biochemistry Department, Bioscience Institute of Botucatu (IBB), State University of São Paulo (UNESP), Botucatu 18618-000, São Paulo, Brazil
| | - Gilberto C Franchi
- Onco-Hematological Child Research Center (CIPOI), Faculty of Medical Sciences, University of Campinas-UNICAMP, Campinas 13083-970, São Paulo, Brazil
| | - Willian F Zambuzzi
- Laboratory of Bioassays and Cellular Dynamics (LaBIO), Chemistry and Biochemistry Department, Bioscience Institute of Botucatu (IBB), State University of São Paulo (UNESP), Botucatu 18618-000, São Paulo, Brazil
| | - Cloves G Rodrigues
- Post-Graduation Program in Industrial and Systems Engineering, Pontifical Catholic University of Goiás, Goiânia 74175-120, Goiás, Brazil
- School of Exact Sciences and Computing, Pontifical Catholic University of Goiás, Goiânia 74175-120, Goiás, Brazil
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Abstract
Ingestion and digestion of food as well as expulsion of residual material from our gastrointestinal tract requires normal propulsive, i.e. motor, function. Hypomotility refers to inherited or acquired changes that come with decreased contractile forces or slower transit. It not only often causes symptoms but also may compromise nutritional status or lead to other complications. While severe forms, such as pseudo-obstruction or ileus, may have a tremendous functional impact, the less severe forms of hypomotility may well be more relevant, as they contribute to common disorders, such as functional dyspepsia, gastroparesis, chronic constipation, and irritable bowel syndrome (IBS). Clinical testing can identify changes in contractile activity, defined by lower amplitudes or abnormal patterns, and the related effects on transit. However, such biomarkers show a limited correlation with overall symptom severity as experienced by patients. Similarly, targeting hypomotility with pharmacological interventions often alters gut motor function but does not consistently improve symptoms. Novel diagnostic approaches may change this apparent paradox and enable us to obtain more comprehensive information by integrating data on electrical activity, mechanical forces, patterns, wall stiffness, and motions with information of the flow of luminal contents. New drugs with more selective effects or more specific delivery may improve benefits and limit adverse effects. Lastly, the complex regulation of gastrointestinal motility involves the brain-gut axis as a reciprocal pathway for afferent and efferent signaling. Considering the role of visceral input in emotion and the effects of emotion on visceral activity, understanding and managing hypomotility disorders requires an integrative approach based on the mind-body continuum or biopsychosocial model of diseases.
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Affiliation(s)
- Klaus Bielefeldt
- Department of Internal Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Ashok Tuteja
- Department of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Salman Nusrat
- Department of Medicine, Oklahoma University Medical Center, Oklahoma City, OK, USA
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Martins ML, Ignazzi R, Eckert J, Watts B, Kaneno R, Zambuzzi WF, Daemen L, Saeki MJ, Bordallo HN. Restricted mobility of specific functional groups reduces anti-cancer drug activity in healthy cells. Sci Rep 2016; 6:22478. [PMID: 26932808 PMCID: PMC4773877 DOI: 10.1038/srep22478] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 02/08/2016] [Indexed: 12/23/2022] Open
Abstract
The most common cancer treatments currently available are radio- and chemo-therapy. These therapies have, however, drawbacks, such as, the reduction in quality of life and the low efficiency of radiotherapy in cases of multiple metastases. To lessen these effects, we have encapsulated an anti-cancer drug into a biocompatible matrix. In-vitro assays indicate that this bio-nanocomposite is able to interact and cause morphological changes in cancer cells. Meanwhile, no alterations were observed in monocytes and fibroblasts, indicating that this system might carry the drug in living organisms with reduced clearance rate and toxicity. X-rays and neutrons were used to investigate the carrier structure, as well as to assess the drug mobility within the bio-nanocomposite. From these unique data we show that partial mobility restriction of active groups of the drug molecule suggests why this carrier design is potentially safer to healthy cells.
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Affiliation(s)
- Murillo L. Martins
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
- Instituto de Biociências - Universidade Estadual Paulista – CP 510, 18618-970 Botucatu–SP, Brazil
| | - Rosanna Ignazzi
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Juergen Eckert
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave., Tampa, Florida 33620, United States
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Benjamin Watts
- Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Ramon Kaneno
- Instituto de Biociências - Universidade Estadual Paulista – CP 510, 18618-970 Botucatu–SP, Brazil
| | - Willian F. Zambuzzi
- Instituto de Biociências - Universidade Estadual Paulista – CP 510, 18618-970 Botucatu–SP, Brazil
| | - Luke Daemen
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Margarida J. Saeki
- Instituto de Biociências - Universidade Estadual Paulista – CP 510, 18618-970 Botucatu–SP, Brazil
| | - Heloisa N. Bordallo
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
- European Spallation Source ESS AB, PO Box 176, SE-221 00 Lund, Sweden
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