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Luiz LMD, Marques IA, Folador JP, Andrade AO. Intra and inter-rater remote assessment of bradykinesia in Parkinson's disease. Neurologia 2024; 39:345-352. [PMID: 38616062 DOI: 10.1016/j.nrleng.2021.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 08/04/2021] [Indexed: 04/16/2024] Open
Abstract
INTRODUCTION Reliable assessment of individuals with Parkinson's disease (PD) is essential for providing adequate treatment. Clinical assessment is a complex and time-consuming task, especially for bradykinesia, since its evaluation can be influenced by the degree of experience of the examiner, patient collaboration and individual bias. Improvement of the clinical evaluation can be obtained by considering assessments from several professionals. However, this is only true when inter and intra-rater agreement are high. Recently, the Movement Disorder Society highlighted, during the COVID-19 pandemic, the need to develop and validate technologies for remote assessment of the motor status of people with PD. Thus, this study introduces an objective strategy for the remote evaluation of bradykinesia using multi-specialist analysis. METHODS Twelve volunteers with PD participated and these were asked to execute finger tapping, hand opening/closing and pronation/supination movements. Each task was recorded and rated by fourteen PD health experts for each patient. The scores were assessed on an individual basis. Intra and inter-rater agreement and correlation were estimated. RESULTS The results showed that agreements and correlations between experienced examiners were high with low variability. In addition, group analysis was noted as possessing the potential to solve individual inconsistency bias. CONCLUSION Furthermore, this study demonstrated the need for a group with prior training and experience, along with indicating the importance for the development of a clinical protocol that can use telemedicine for the evaluation of individuals with PD, as well as the inclusion of a specialized mediating group. In Addition, this research helps to the development of a valid remote assessment of bradykinesia.
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Affiliation(s)
- L M D Luiz
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil.
| | - I A Marques
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil
| | - J P Folador
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil
| | - A O Andrade
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil
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Figueiredo D, Marques IA, Pires AS, Cavaleiro CF, Costa LC, Castela G, Murta JN, Botelho MF, Abrantes AM. Risk of Second Tumors in Retinoblastoma Survivors after Ionizing Radiation: A Review. Cancers (Basel) 2023; 15:5336. [PMID: 38001596 PMCID: PMC10670427 DOI: 10.3390/cancers15225336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/03/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Retinoblastoma (RB) is the most common ocular neoplasm in children, whose development depends on two mutational events that occur in both alleles of the retinoblastoma susceptibility gene (RB1). Regarding the nature of these mutational events, RB can be classified as hereditary if the first event is a germline mutation and the second one is a somatic mutation in retina cells or nonhereditary if both mutational events occur in somatic cells. Although the rate of survival of RB is significantly elevated, the incidence of second malignant neoplasms (SMNs) is a concern, since SMNs are the main cause of death in these patients. Effectively, RB patients present a higher risk of SMN incidence compared to other oncology patients. Furthermore, evidence confirms that hereditary RB survivors are at a higher risk for SMNs than nonhereditary RB survivors. Over the decades, some studies have been performed to better understand this subject, evaluating the risk of the development of SMNs in RB patients. Furthermore, this risk seems to increase with the use of ionizing radiation in some therapeutic approaches commonly used in the treatment of RB. This review aims to clarify the effect of ionizing radiation in RB patients and to understand the association between the risk of SMN incidence in patients that underwent radiation therapy, especially in hereditary RB individuals.
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Affiliation(s)
- Diana Figueiredo
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics, Faculty of Medicine, 3000-548 Coimbra, Portugal; (D.F.); (I.A.M.); (A.S.P.)
- University of Coimbra, Faculty of Sciences and Technology, 3000-548 Coimbra, Portugal
| | - Inês A. Marques
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics, Faculty of Medicine, 3000-548 Coimbra, Portugal; (D.F.); (I.A.M.); (A.S.P.)
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- University of Coimbra, Faculty of Pharmacy, 3000-548 Coimbra, Portugal
| | - Ana Salomé Pires
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics, Faculty of Medicine, 3000-548 Coimbra, Portugal; (D.F.); (I.A.M.); (A.S.P.)
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Centre of Coimbra (CACC), 3000-061 Coimbra, Portugal; (G.C.); (J.N.M.)
| | - Claudia F. Cavaleiro
- Medical Imaging and Radiotherapy Department, Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, 3045-093 Coimbra, Portugal; (C.F.C.); (L.C.C.)
| | - Luís C. Costa
- Medical Imaging and Radiotherapy Department, Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, 3045-093 Coimbra, Portugal; (C.F.C.); (L.C.C.)
| | - Guilherme Castela
- Clinical Academic Centre of Coimbra (CACC), 3000-061 Coimbra, Portugal; (G.C.); (J.N.M.)
- Pediatric Oncology Service, Centro Hospitalar Universitário de Coimbra, 3000-602 Coimbra, Portugal
- Department of Ophthalmology, Centro de Responsabilidade Integrado de Oftalmologia, Centro Hospitalar e Universitário de Coimbra, 3000-602 Coimbra, Portugal
- University of Coimbra, Faculty of Medicine, 3000-548 Coimbra, Portugal
| | - Joaquim N. Murta
- Clinical Academic Centre of Coimbra (CACC), 3000-061 Coimbra, Portugal; (G.C.); (J.N.M.)
- Department of Ophthalmology, Centro de Responsabilidade Integrado de Oftalmologia, Centro Hospitalar e Universitário de Coimbra, 3000-602 Coimbra, Portugal
- University of Coimbra, Faculty of Medicine, 3000-548 Coimbra, Portugal
| | - Maria Filomena Botelho
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics, Faculty of Medicine, 3000-548 Coimbra, Portugal; (D.F.); (I.A.M.); (A.S.P.)
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Centre of Coimbra (CACC), 3000-061 Coimbra, Portugal; (G.C.); (J.N.M.)
| | - Ana Margarida Abrantes
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics, Faculty of Medicine, 3000-548 Coimbra, Portugal; (D.F.); (I.A.M.); (A.S.P.)
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Centre of Coimbra (CACC), 3000-061 Coimbra, Portugal; (G.C.); (J.N.M.)
- Medical Imaging and Radiotherapy Department, Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, 3045-093 Coimbra, Portugal; (C.F.C.); (L.C.C.)
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Jokar S, Marques IA, Khazaei S, Martins-Marques T, Girao H, Laranjo M, Botelho MF. The Footprint of Exosomes in the Radiation-Induced Bystander Effects. Bioengineering (Basel) 2022; 9:bioengineering9060243. [PMID: 35735486 PMCID: PMC9220715 DOI: 10.3390/bioengineering9060243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/07/2022] [Accepted: 05/26/2022] [Indexed: 12/12/2022] Open
Abstract
Radiation therapy is widely used as the primary treatment option for several cancer types. However, radiation therapy is a nonspecific method and associated with significant challenges such as radioresistance and non-targeted effects. The radiation-induced non-targeted effects on nonirradiated cells nearby are known as bystander effects, while effects far from the ionising radiation-exposed cells are known as abscopal effects. These effects are presented as a consequence of intercellular communications. Therefore, a better understanding of the involved intercellular signals may bring promising new strategies for radiation risk assessment and potential targets for developing novel radiotherapy strategies. Recent studies indicate that radiation-derived extracellular vesicles, particularly exosomes, play a vital role in intercellular communications and may result in radioresistance and non-targeted effects. This review describes exosome biology, intercellular interactions, and response to different environmental stressors and diseases, and focuses on their role as functional mediators in inducing radiation-induced bystander effect (RIBE).
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Affiliation(s)
- Safura Jokar
- Department of Nuclear Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran P94V+927, Iran;
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (I.A.M.); (M.L.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (T.M.-M.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
| | - Inês A. Marques
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (I.A.M.); (M.L.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (T.M.-M.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Centre of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Saeedeh Khazaei
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran P94V+927, Iran;
| | - Tania Martins-Marques
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (T.M.-M.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical and Academic Centre of Coimbra (CACC), 3004-561 Coimbra, Portugal
| | - Henrique Girao
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (T.M.-M.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical and Academic Centre of Coimbra (CACC), 3004-561 Coimbra, Portugal
| | - Mafalda Laranjo
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (I.A.M.); (M.L.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (T.M.-M.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Centre of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical and Academic Centre of Coimbra (CACC), 3004-561 Coimbra, Portugal
| | - Maria Filomena Botelho
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (I.A.M.); (M.L.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (T.M.-M.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Centre of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical and Academic Centre of Coimbra (CACC), 3004-561 Coimbra, Portugal
- Correspondence:
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Luiz LMD, Marques IA, Folador JP, Andrade AO. Intra and inter-rater remote assessment of bradykinesia in Parkinson's disease. Neurologia 2021:S0213-4853(21)00130-4. [PMID: 34538673 DOI: 10.1016/j.nrl.2021.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/02/2021] [Accepted: 08/04/2021] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Reliable assessment of individuals with Parkinson's disease (PD) is essential for providing adequate treatment. Clinical assessment is a complex and time-consuming task, especially for bradykinesia, since its evaluation can be influenced by the degree of experience of the examiner, patient collaboration and individual bias. Improvement of the clinical evaluation can be obtained by considering assessments from several professionals. However, this is only true when inter and intra-rater agreement are high. Recently, the Movement Disorder Society highlighted, during the COVID-19 pandemic, the need to develop and validate technologies for remote assessment of the motor status of people with PD. Thus, this study introduces an objective strategy for the remote evaluation of bradykinesia using multi-specialist analysis. METHODS Twelve volunteers with PD participated and these were asked to execute finger tapping, hand opening/closing and pronation/supination movements. Each task was recorded and rated by fourteen PD health experts for each patient. The scores were assessed on an individual basis. Intra and inter-rater agreement and correlation were estimated. RESULTS The results showed that agreements and correlations between experienced examiners were high with low variability. In addition, group analysis was noted as possessing the potential to solve individual inconsistency bias. CONCLUSION Furthermore, this study demonstrated the need for a group with prior training and experience, along with indicating the importance for the development of a clinical protocol that can use telemedicine for the evaluation of individuals with PD, as well as the inclusion of a specialized mediating group. In Addition, this research helps to the development of a valid remote assessment of bradykinesia.
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Affiliation(s)
- L M D Luiz
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil.
| | - I A Marques
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil
| | - J P Folador
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil
| | - A O Andrade
- Centre for Innovation and Technology Assessment in Health, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Brazil
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Pires AS, Varela CL, Marques IA, Abrantes AM, Gonçalves C, Rodrigues T, Matafome P, Botelho MF, Roleira FMF, Tavares-da-Silva E. Oxymestane, a cytostatic steroid derivative of exemestane with greater antitumor activity in non-estrogen-dependent cell lines. J Steroid Biochem Mol Biol 2021; 212:105950. [PMID: 34271024 DOI: 10.1016/j.jsbmb.2021.105950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/29/2021] [Accepted: 07/11/2021] [Indexed: 02/06/2023]
Abstract
A new promising steroid derivative of Exemestane (Exe), the drug used for the treatment of estrogen-dependent breast cancer, was synthesized and evaluated against a set of human cancer cell lines. The new compound (Oxymestane-D1, Oxy) was tested comparatively with Exe against colon (C2BBe1, WiDr), liver (HepG2, HuH-7), lung (A549, H1299) and prostate (LNCaP, PC3) human cancer cell lines. Likewise, its effect on human colon normal cells (CCD-841 CoN) and human normal fibroblast cells (HFF-1) was studied. The cytostatic activity of Oxy was also compared with that of the reference cytostatic drugs used in chemotherapy protocols, namely carboplatin, cisplatin, doxorubicin, epirubicin, etoposide, flutamide, 5-fluorouracil, irinotecan, oxaliplatin and sorafenib. In all cell lines tested, Oxy proved to be more powerful cytostatic than Exe. Additionally, the IC50 at 72 h showed a three-fold activity greater than 5-fluorouracil in the WiDr cell line, twice as high as cisplatin for cell line A549 and five times higher than cisplatin for cell line H1299. Also, Oxy surprisingly revealed to induce DNA damage and inhibit the DNA damage response (DDR) proteins ATM, ATR, CHK1 and CHK2. The results obtained allow concluding that Oxy can be a promising anticancer agent to be used in chemotherapy protocols. Furthermore, its ability to inhibit crucial components of DDR can also be useful for the monotherapy or for combination with chemo and/or radiotherapy of cancer.
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Affiliation(s)
- Ana S Pires
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; Clinical Academic Center of Coimbra, Praceta Prof. Mota Pinto, Coimbra, 3004-561, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Carla L Varela
- University of Coimbra, CIEPQPF, FFUC, Laboratory of Pharmaceutical Chemistry, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Inês A Marques
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; Clinical Academic Center of Coimbra, Praceta Prof. Mota Pinto, Coimbra, 3004-561, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; University of Coimbra, Faculty of Pharmacy, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Ana M Abrantes
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; Clinical Academic Center of Coimbra, Praceta Prof. Mota Pinto, Coimbra, 3004-561, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Cristina Gonçalves
- Clinical Academic Center of Coimbra, Praceta Prof. Mota Pinto, Coimbra, 3004-561, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Laboratory of Oncobiology and Hematology and University Clinic of Hematology of Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Tiago Rodrigues
- Clinical Academic Center of Coimbra, Praceta Prof. Mota Pinto, Coimbra, 3004-561, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Paulo Matafome
- Clinical Academic Center of Coimbra, Praceta Prof. Mota Pinto, Coimbra, 3004-561, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Maria F Botelho
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal; Clinical Academic Center of Coimbra, Praceta Prof. Mota Pinto, Coimbra, 3004-561, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Fernanda M F Roleira
- University of Coimbra, CIEPQPF, FFUC, Laboratory of Pharmaceutical Chemistry, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
| | - Elisiário Tavares-da-Silva
- University of Coimbra, CIEPQPF, FFUC, Laboratory of Pharmaceutical Chemistry, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, Coimbra, 3000-548, Portugal.
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Marques IA, Abrantes AM, Pires AS, Neves AR, Caramelo FJ, Rodrigues T, Matafome P, Tavares-da-Silva E, Gonçalves AC, Pereira CC, Teixeira JP, Seiça R, Costa G, Figueiredo A, Botelho MF. Kinetics of radium-223 and its effects on survival, proliferation and DNA damage in lymph-node and bone metastatic prostate cancer cell lines. Int J Radiat Biol 2021; 97:714-726. [PMID: 33764249 DOI: 10.1080/09553002.2021.1906462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Metastatic castration-resistant prostate cancer (mCRPC) is associated with a very unfavorable prognosis. At this advanced stage of the disease, there are several therapeutic strategies approved in recent times, being one of them Radium-223 dichloride (Radium-223). However, its mechanisms of action and the process that conducts to cell death are not fully understood. Given this, our main goal is to characterize the radiobiological effects induced by Radium-223 and to evaluate its kinetics on metastatic Prostate Cancer (mPCa) cells. MATERIALS AND METHODS In vitro studies were conducted using two mPCa cell lines, the LNCaP and PC3, the first being derived from lymph node metastasis and the second from bone metastasis. Kinetic studies were conducted to access the capacity of these cell lines to uptake, retain and internalize the Radium-223. For the assessment of radiobiological effects, cells were first exposed to different doses of Radium-223 and the clonogenic assay was done to evaluate cell survival and to determine lethal doses (LD50). Then, the effects were also evaluated in terms of proliferation, oxidative stress, morphological changes and cell damage. RESULTS Radium-223 is uptaken by mPCa cells and reaches the nucleus, where it is retained over time. Irradiation decreases cell survival and proliferation, with LNCaP cells (LD50 = 1.73mGy) being more radiosensitive than PC3 cells (LD50 = 4.20mGy). Irradiated cells showed morphological changes usually associated with apoptosis and a dose-dependent increase in DNA damage. Moreover, activation of cell cycle checkpoints occurs through ATM/CHK2 pathway, which is involved in cell cycle arrest and cell death. CONCLUSIONS The cytotoxic and anti-proliferative effects on both cell lines showed that Radium-223 can decrease the aggressiveness of tumor cells by decreasing the cell survival and proliferation and, also, by increasing the DNA damage. The similar results observed in both cell lines indicated that Radium-223 may have the potential to be used as a therapeutic option also for mCRPC patients with lymph node metastasis. The activation of DNA Damage Response pathways allows the possibility to understand the importance of these checkpoints as targets for new combined therapies.
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Affiliation(s)
- Inês A Marques
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Faculty of Pharmacy, Coimbra, Portugal
| | - Ana M Abrantes
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
| | - Ana S Pires
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
| | - Ana R Neves
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Project Development Office, Department of Mathematics and Computer Science, Eindhoven University of Technology (TU/e), Eindhoven, The Netherlands
| | - Francisco J Caramelo
- Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Biostatistics and Medical Informatics of Faculty of Medicine, Coimbra, Portugal
| | - Tiago Rodrigues
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Coimbra, Portugal
| | - Paulo Matafome
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Coimbra, Portugal
| | - Edgar Tavares-da-Silva
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Urology and Renal Transplantation, Coimbra, Portugal
| | - Ana C Gonçalves
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Oncobiology and Hematology and University Clinic of Hematology of Faculty of Medicine, Coimbra, Portugal
| | - Cristiana C Pereira
- National Institute of Health, Environmental Health Department, Porto, Portugal.,EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
| | - João P Teixeira
- National Institute of Health, Environmental Health Department, Porto, Portugal.,EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
| | - Raquel Seiça
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Coimbra, Portugal
| | - Grancinda Costa
- Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Nuclear Medicine, Coimbra, Portugal
| | - Arnaldo Figueiredo
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Urology and Renal Transplantation, Coimbra, Portugal
| | - Maria F Botelho
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
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7
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Tavares-da-Silva E, Pereira E, Pires AS, Neves AR, Braz-Guilherme C, Marques IA, Abrantes AM, Gonçalves AC, Caramelo F, Silva-Teixeira R, Mendes F, Figueiredo A, Botelho MF. Cold Atmospheric Plasma, a Novel Approach against Bladder Cancer, with Higher Sensitivity for the High-Grade Cell Line. Biology (Basel) 2021; 10:biology10010041. [PMID: 33435434 PMCID: PMC7828061 DOI: 10.3390/biology10010041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/02/2021] [Accepted: 01/07/2021] [Indexed: 12/24/2022]
Abstract
Simple Summary Bladder cancer has a high incidence and mortality. Besides this, currently available therapies for this type of cancer have low efficacy and show considerable adverse effects, urging the need of new therapeutic approaches. Cold Atmospheric Plasma treatment presents itself as a promising alternative, having demonstrated antitumor effects against several types of cancer. The present work arises from a multidisciplinary team, namely, medical doctors and researchers, in an attempt to find new therapeutic strategies to fight bladder cancer. Therefore, our main objective is to evaluate Cold Atmospheric Plasma effects against bladder cancer, as well as the mechanisms by which it exerts its effects. The results obtained demonstrate that Cold Atmospheric Plasma treatment has a promising antitumor effect on bladder cancer, with higher sensitivity for the high-grade cell line. This new approach using Cold Atmospheric Plasma for the treatment of bladder cancer presents enormous clinical benefits, since it is able to selectively treat the tumor tissue, sparing the normal urothelium, with an additional glaring positive economic impact, since it entails a decrease in the cost of therapy in comparison with conventional therapeutic options. Abstract Antitumor therapies based on Cold Atmospheric Plasma (CAP) are an emerging medical field. In this work, we evaluated CAP effects on bladder cancer. Two bladder cancer cell lines were used, HT-1376 (stage III) and TCCSUP (stage IV). Cell proliferation assays were performed evaluating metabolic activity (MTT assay) and protein content (SRB assay). Cell viability, cell cycle, and mitochondrial membrane potential (Δψm) were assessed using flow cytometry. Reactive oxygen and nitrogen species (RONS) and reduced glutathione (GSH) were evaluated by fluorescence. The assays were carried out with different CAP exposure times. For both cell lines, we obtained a significant reduction in metabolic activity and protein content. There was a decrease in cell viability, as well as a cell cycle arrest in S phase. The Δψm was significantly reduced. There was an increase in superoxide and nitric oxide and a decrease in peroxide contents, while GSH content did not change. These results were dependent on the exposure time, with small differences for both cell lines, but overall, they were more pronounced in the TCCSUP cell line. CAP showed to have a promising antitumor effect on bladder cancer, with higher sensitivity for the high-grade cell line.
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Affiliation(s)
- Edgar Tavares-da-Silva
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, 3000-548 Coimbra, Portugal;
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Urology and Renal Transplantation, 3004-561 Coimbra, Portugal
- Correspondence: (E.T.-d.-S.); (E.P.)
| | - Eurico Pereira
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
- Correspondence: (E.T.-d.-S.); (E.P.)
| | - Ana S. Pires
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
| | - Ana R. Neves
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
- Project Development Office, Department of Mathematics and Computer Science, Eindhoven University of Technology (TU/e), PO Box 513 5600 MB Eindhoven, The Netherlands
| | - Catarina Braz-Guilherme
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
- University of Porto, Faculty of Medicine, 4200-319 Porto, Portugal
| | - Inês A. Marques
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
- University of Coimbra, Faculty of Pharmacy, 3000-548 Coimbra, Portugal
| | - Ana M. Abrantes
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
| | - Ana C. Gonçalves
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Laboratory of Oncobiology and Hematology and University Clinic of Hematology of Faculty of Medicine, 3000-548 Coimbra, Portugal
| | - Francisco Caramelo
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Laboratory of Biostatistics and Medical Informatics of Faculty of Medicine, 3000-548 Coimbra, Portugal
| | - Rafael Silva-Teixeira
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
| | - Fernando Mendes
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
- Politécnico de Coimbra, ESTeSC, DCBL, Rua 5 de Outubro-SM Bispo, Apartado 7006, 3046-854 Coimbra, Portugal
| | - Arnaldo Figueiredo
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, 3000-548 Coimbra, Portugal;
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Urology and Renal Transplantation, 3004-561 Coimbra, Portugal
| | - Maria Filomena Botelho
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal; (A.S.P.); (I.A.M.); (A.M.A.); (A.C.G.); (F.M.); (M.F.B.)
- Clinical Academic Center of Coimbra (CACC), 3000-548 Coimbra, Portugal; (A.R.N.); (C.B.-G.); (F.C.); (R.S.-T.)
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, 3000-548 Coimbra, Portugal
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Parreira P, Sousa LB, Marques IA, Santos-Costa P, Cortez S, Carneiro F, Cruz A, Salgueiro-Oliveira A. Study Protocol for Two-Steps Parallel Randomized Controlled Trial: Pre-Clinical Usability Tests for a New Double-Chamber Syringe. Int J Environ Res Public Health 2020; 17:8376. [PMID: 33561056 PMCID: PMC7696070 DOI: 10.3390/ijerph17228376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/06/2020] [Accepted: 11/11/2020] [Indexed: 11/25/2022]
Abstract
A new double-chamber syringe (DUO Syringe) was developed for intravenous drug administration and catheter flushing. This study presents a protocol for pre-clinical usability tests to validate the golden prototype of this new device, performed in a high-fidelity simulation lab by nurses. A two-steps parallel randomized controlled trial with two arms was designed (with standard syringes currently used in clinical practice and with the DUO Syringe). After randomization, eligible and consented participants will be requested to perform, individually, intravenous drug administration and flushing, following the arm that has been allocated. The procedure will be video-recorded for posterior analyses. After the completion of the tasks, nurses will be asked to answer a demographic survey, as well as an interview about their qualitative assessment of the device. A final focus group with all participants will also be conducted. Primary outcomes will concern the DUO Syringe's effectiveness, efficiency, and safety, while secondary outcomes will focus on nurses' satisfaction and intention of use. The pre-clinical protocol was defined according to the legal requirements and ISO norms and was reviewed and approved by the Ethics Committee of the Health Sciences Research Unit: Nursing of the Nursing School of Coimbra.
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Affiliation(s)
- Pedro Parreira
- The Health Sciences Research Unit, Nursing, Nursing School of Coimbra, 3004-011 Coimbra, Portugal; (P.P.); (I.A.M.); (P.S.-C.); (A.C.); (A.S.-O.)
| | - Liliana B. Sousa
- The Health Sciences Research Unit, Nursing, Nursing School of Coimbra, 3004-011 Coimbra, Portugal; (P.P.); (I.A.M.); (P.S.-C.); (A.C.); (A.S.-O.)
| | - Inês A. Marques
- The Health Sciences Research Unit, Nursing, Nursing School of Coimbra, 3004-011 Coimbra, Portugal; (P.P.); (I.A.M.); (P.S.-C.); (A.C.); (A.S.-O.)
- Biophysics Institute, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of CIMAGO, Faculty of Medicine, CIBB, University of Coimbra, 3000-354 Coimbra, Portugal
| | - Paulo Santos-Costa
- The Health Sciences Research Unit, Nursing, Nursing School of Coimbra, 3004-011 Coimbra, Portugal; (P.P.); (I.A.M.); (P.S.-C.); (A.C.); (A.S.-O.)
| | - Sara Cortez
- Muroplás—Plastic Engineering Industry, 4745-334 Muro, Portugal;
| | - Filipa Carneiro
- PIEP—Innovation in Polymer Engineering, Guimarães, 4800-058 Braga, Portugal;
| | - Arménio Cruz
- The Health Sciences Research Unit, Nursing, Nursing School of Coimbra, 3004-011 Coimbra, Portugal; (P.P.); (I.A.M.); (P.S.-C.); (A.C.); (A.S.-O.)
| | - Anabela Salgueiro-Oliveira
- The Health Sciences Research Unit, Nursing, Nursing School of Coimbra, 3004-011 Coimbra, Portugal; (P.P.); (I.A.M.); (P.S.-C.); (A.C.); (A.S.-O.)
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Sousa LB, Santos-Costa P, Marques IA, Cruz A, Salgueiro-Oliveira A, Parreira P. Brief Report on Double-Chamber Syringes Patents and Implications for Infusion Therapy Safety and Efficiency. Int J Environ Res Public Health 2020; 17:E8209. [PMID: 33172109 PMCID: PMC7664416 DOI: 10.3390/ijerph17218209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 10/29/2020] [Accepted: 11/05/2020] [Indexed: 12/15/2022]
Abstract
This review aimed to map the existing patents of double-chamber syringes that can be used for intravenous drug administration and catheter flush. A search was conducted in the Google patents database for records published prior to 28 October 2020, using several search terms related to double-chamber syringes (DCS). Study eligibility and data extraction were performed by two independent reviewers. Of the initial 26,110 patents found, 24 were included in this review. The 24 DCS that were found display two or more independent chambers that allow for the administration of multiple solutions. While some of the DCS have designated one of the chambers as the flushing chamber, most patents only allow for the sequential use of the flushing chamber after intravenous drug administration. Most DCS were developed for drug reconstitution, usually with a freeze-dried drug in one chamber. Some patents were designed for safety purposes, with a parallel post-injection safety sheath chamber for enclosing a sharpened needle tip. None of the DCS found allow for a pre- and post-intravenous drug administration flush. Given the current standards of care in infusion therapy, future devices must allow for the sequential use of the flushing chamber to promote a pre-administration patency assessment and a post-administration device flush.
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Affiliation(s)
- Liliana B. Sousa
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), 3046-851 Coimbra, Portugal; (P.S.-C.); (A.C.); (A.S.-O.); (P.P.)
| | - Paulo Santos-Costa
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), 3046-851 Coimbra, Portugal; (P.S.-C.); (A.C.); (A.S.-O.); (P.P.)
- Instituto de Ciências da Saúde, Universidade Católica Portuguesa, 4169-005 Porto, Portugal
| | - Inês A. Marques
- Biophysics Institute, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of CIMAGO, Faculty of Medicine, CNC.IBILI, Faculty of Medicine, University of Coimbra, Polo das Ciências da Saúde Azinhaga de Santa Comba, 3000-354 Coimbra, Portugal;
| | - Arménio Cruz
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), 3046-851 Coimbra, Portugal; (P.S.-C.); (A.C.); (A.S.-O.); (P.P.)
| | - Anabela Salgueiro-Oliveira
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), 3046-851 Coimbra, Portugal; (P.S.-C.); (A.C.); (A.S.-O.); (P.P.)
| | - Pedro Parreira
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), 3046-851 Coimbra, Portugal; (P.S.-C.); (A.C.); (A.S.-O.); (P.P.)
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10
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Parreira P, B. Sousa L, Marques IA, Costa P, Cortez S, Carneiro F, Cruz A, Salgueiro-Oliveira A. Development of an innovative double-chamber syringe for intravenous therapeutics and flushing: Nurses' involvement through a human-centred approach. PLoS One 2020; 15:e0235087. [PMID: 32584864 PMCID: PMC7316231 DOI: 10.1371/journal.pone.0235087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 06/08/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND In nursing practice, flushing the catheters pre and post-drug administration is considered an important clinical procedure to prevent complications, and requires the use of several syringes to comply with international standards of care. We envisioned an innovative double-chamber syringe that enables the filling and administration of both solutions. Following current international recommendations, the development of new medical devices should integrate Health Technology Assessment. The Human-centred design is usually used for that assessment purposes, as a method that actively include end-users in the devices development process. METHOD Application of the Human-Centred Design through the involvement of nurses in the initial stages of the device development in order to accomplish the initial stages of Technology Readiness Level. A multi-method approach was used, including literature/guidelines review, focus groups with end-users and expert panels. RESULTS The involvement of nurses enabled the definition of user requirements and contexts of use, as well as the evaluation of design solutions and prototypes in order to accomplish with usability and ergonomic features of the medical device. CONCLUSIONS Significant contributions were made regarding the final design solution of this innovative double-chamber syringe.
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Affiliation(s)
- Pedro Parreira
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Liliana B. Sousa
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Inês A. Marques
- Coimbra Institute for Clinical and Biomedical Research (iCBR) area of CIMAGO, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Paulo Costa
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Sara Cortez
- Muroplás - Plastic Engineering Industry, Muro, Portugal
| | | | - Arménio Cruz
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Anabela Salgueiro-Oliveira
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
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Parreira P, Sousa LB, Marques IA, Santos-Costa P, Braga LM, Cruz A, Salgueiro-Oliveira A. Double-chamber syringe versus classic syringes for peripheral intravenous drug administration and catheter flushing: a study protocol for a randomised controlled trial. Trials 2020; 21:78. [PMID: 31937342 PMCID: PMC6961373 DOI: 10.1186/s13063-019-3887-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/05/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND The prevention of catheter-related complications is nowadays an important topic of research. Flushing catheters is considered an important clinical procedure in preventing malfunction and several complications such as phlebitis or infection. Considering the latest guidelines of the Infusion Nurses Society, the flushing should be carried out both pre- and post-drug administration, requiring different syringes (with associated overall increased times of preparation/administration of intravenous medication by nurses, and also increasing the need for manipulation of the venous catheter). METHODS/DESIGN A multi-centre, two-arm randomised controlled trial with partially blinded outcome assessment of 146 adult patients. After eligibility analysis and informed consent, participants will receive usual intravenous administration drugs with flushing procedures, with a double-chamber syringe (arm A) or with classic syringes (arm B). The outcomes assessment will be performed on a daily basis by an unblinded ward team, with the same procedures in both groups. Some main outcomes, such as phlebitis and infiltration, will also be evaluated by nurses from a blinded research team and registered once a day. DISCUSSION The study outlined in this protocol will provide valuable insight regarding the effectiveness and safety of this new medical device. The development of this medical device (dual-chamber syringe, for drug and flush solution) seems to be an important step to facilitate nurses' adoption of good clinical practices in intravenous procedures, reducing catheter manipulations. TRIAL REGISTRATION ClinicalTrials.gov, NCT04046770. Registered 13 August 2019.
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Affiliation(s)
- Pedro Parreira
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Avenida Bissaya Barreto, Apartado 7001, 3046-851 Coimbra, Portugal
| | - Liliana B. Sousa
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Avenida Bissaya Barreto, Apartado 7001, 3046-851 Coimbra, Portugal
| | - Inês A. Marques
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Avenida Bissaya Barreto, Apartado 7001, 3046-851 Coimbra, Portugal
- Biophysics Institute, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of CIMAGO, Faculty of Medicine, CNC.IBILI, Faculty of Medicine, University of Coimbra, Polo das Ciências da Saúde Azinhaga de Santa Comba, 3000-354 Coimbra, Portugal
| | - Paulo Santos-Costa
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Avenida Bissaya Barreto, Apartado 7001, 3046-851 Coimbra, Portugal
| | - Luciene M. Braga
- Departamento Medicina e Enfermagem, Universidade Federal Viçosa, Av. Peter Henry Rolfs, s/n Campus Universitário, Viçosa, MG 36570-900 Brazil
| | - Arménio Cruz
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Avenida Bissaya Barreto, Apartado 7001, 3046-851 Coimbra, Portugal
| | - Anabela Salgueiro-Oliveira
- Health Sciences Research Unit: Nursing (UICISA:E), Nursing School of Coimbra (ESEnfC), Avenida Bissaya Barreto, Apartado 7001, 3046-851 Coimbra, Portugal
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Pires AS, Marques CR, Encarnação JC, Abrantes AM, Marques IA, Laranjo M, Oliveira R, Casalta-Lopes JE, Gonçalves AC, Sarmento-Ribeiro AB, Botelho MF. Ascorbic Acid Chemosensitizes Colorectal Cancer Cells and Synergistically Inhibits Tumor Growth. Front Physiol 2018; 9:911. [PMID: 30083105 PMCID: PMC6064950 DOI: 10.3389/fphys.2018.00911] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 06/21/2018] [Indexed: 12/17/2022] Open
Abstract
Colorectal cancer (CRC) is continuously classified as one of the most incidental and mortal types of cancer worldwide. The positive outcomes of the conventional chemotherapy are frequently associated with high toxicity, which often leads to the suspension of the treatment. Growing evidences consider the use of pharmacological concentrations of ascorbic acid (AA), better known as vitamin C, in the treatment of cancer. The use of AA in a clinical context is essentially related to the adoption of new therapeutic strategies based on combination regimens, where AA plays a chemosensitizing role. The reduced sensitivity of some tumors to chemotherapy and the highly associated adverse effects continue to be some of the major obstacles in the effective treatment of CRC. So, this paper aimed to study the potential of a new therapeutic approach against this neoplasia with diminished side effects for the patient. This approach was based on the study of the combination of high concentrations of AA with reduced concentrations of drugs conventionally used in CRC patients and eligible for first and second line chemotherapeutic regimens, namely 5-fluorouracilo (5-FU), oxaliplatin (Oxa) or irinotecan (Iri). The evaluation of the potential synergy between the compounds was first assessed in vitro in three CRC cell lines with different genetic background and later in vivo using one xenograft animal model of CRC. AA and 5-FU act synergistically in vitro just for longer incubation times, however, in vivo showed no benefit compared to 5-FU alone. In contrast to the lack of synergy seen in in vitro studies with the combination of AA with irinotecan, the animal model revealed the therapeutic potential of this combination. AA also potentiated the effect of Oxa, since a synergistic effect was demonstrated, in almost all conditions and in the three cell lines. Moreover, this combined therapy (CT) caused a stagnation of the tumor growth rate, being the most promising tested combination. Pharmacological concentrations of AA increased the efficacy of Iri and Oxa against CRC, with promising results in cell lines with more aggressive phenotypes, namely, tumors with mutant or null P53 expression and tumors resistant to chemotherapy.
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Affiliation(s)
- Ana S Pires
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Cláudia R Marques
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal
| | - João C Encarnação
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Ana M Abrantes
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Inês A Marques
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Mafalda Laranjo
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Rui Oliveira
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Department of Pathology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - João E Casalta-Lopes
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Ana C Gonçalves
- Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Oncobiology and Hematology Laboratory, Applied Molecular Biology and University Clinic of Hematology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Ana B Sarmento-Ribeiro
- Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Oncobiology and Hematology Laboratory, Applied Molecular Biology and University Clinic of Hematology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Department of Hematology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Maria F Botelho
- Biophysics Institute, CNC.IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Institute for Clinical and Biomedical Research Area of Environment Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Marques IA, Brodelius PE. Elicitor-Induced l-Tyrosine Decarboxylase from Plant Cell Suspension Cultures : I. Induction and Purification. Plant Physiol 1988; 88:46-51. [PMID: 16666277 PMCID: PMC1055523 DOI: 10.1104/pp.88.1.46] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
l-Tyrosine decarboxylase (EC 4.1.1.25) activity was induced in cell suspension cultures of Thalictrum rugosum Ait. and Eschscholtzia californica Cham. with a yeast polysaccharide preparation (elicitor). The highest l-tyrosine decarboxylase activity in extracts from 7-day-old cell cultures of E. californica was observed 5 hours after addition of 30 to 40 micrograms elicitor per gram cell fresh weight. The enzyme extracted from cells of E. californica was purified 1540-fold to a specific activity of 2.6 micromoles CO(2) produced per minute per milligram protein at pH 8.4 and 30 degrees C. Purified enzyme from T. rugosum showed a specific activity of 0.18 micromoles per minute per milligram protein. The purification procedure involved ammonium sulfate fractionation, anion-exchange fast protein liquid chromatography, ultrafiltration, and hydrophobic interaction chromatography. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis showed that the enzyme from the two plant cell cultures had subunits of identical molecular weight (56,300 +/- 300 daltons.
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Affiliation(s)
- I A Marques
- Institute of Biotechnology, ETH Hönggerberg, CH-8093 Zurich, Switzerland
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Marques IA, Brodelius PE. Elicitor-Induced l-Tyrosine Decarboxylase from Plant Cell Suspension Cultures : II. Partial Characterization. Plant Physiol 1988; 88:52-5. [PMID: 16666278 PMCID: PMC1055524 DOI: 10.1104/pp.88.1.52] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Properties of purified l-tyrosine decarboxylase (EC 4.1.1.25) from elicitor-induced cell suspension cultures of Eschscholtzia californica Cham. and Thalictrum rugosum Ait. are described. l-Tyrosine decarboxylase is a dimeric enzyme with a molecular weight of 112,600 +/- 600 daltons. The isoelectric point was estimated to be at pH 5.2 and pH 5.4 for the enzyme from E. californica and T. rugosum, respectively. The purified enzymes were stabilized in the presence of pyridoxal-5-phosphate. Optimum pH for the enzyme from both plants was found to be 8.4. Enzyme activity was dependent on exogeneously supplied pyridoxal-5-phosphate. The enzyme decarboxylated l-tyrosine and l-beta-3,4-dihydroxyphenylalanine but was inactive toward l-phenylalanine and l-tryptophan. Apparent K(m) values of Eschscholtzia- and Thalictrum-decarboxylase for l-tyrosine were 0.25 +/- 0.03 and 0.27 +/- 0.04 millimolar, respectively. Similar affinities were found for l-3,4-dihydroxyphenylalanine. Eschscholtzial-tyrosine decarboxylase was strongly inhibited by the phenylalanine analogue l-alpha-aminooxy-beta-phenylpropionate and largely unaffected by d,l-alpha-monofluoromethyl-3,4-dihydroxyphenylalanine and alpha-difluoromethyltyrosine.
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Affiliation(s)
- I A Marques
- Institute of Biotechnology, ETH Hönggerberg, HPT, CH-8093 Zurich, Switzerland
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Marques IA, Ford DM, Muschinek G, Anderson LE. Photosynthetic carbon metabolism in isolated pea chloroplasts: metabolite levels and enzyme activities. Arch Biochem Biophys 1987; 252:458-66. [PMID: 3813547 DOI: 10.1016/0003-9861(87)90052-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report here that enzyme activation precedes the rise in metabolite levels, which appear to limit photosynthetic CO2 fixation during induction in pea leaf chloroplasts. Therefore light activation may be required for the build-up of photosynthetic intermediates and hence for photosynthesis in isolated chloroplasts. Analysis of metabolite levels and the known kinetic properties of the chloroplast enzymes indicates that the reductive pentose phosphate cycle is subject to control which fluctuates between several points during induction and when CO2 fixation is maximal. The transketolase-aldolase-catalyzed reactions around sedoheptulose-biphosphatase appear to provide a simple and effective primary control for photosynthetic CO2 fixation. When substrate levels and enzyme active site concentrations are taken into account, there is insufficient glyceraldehyde 3-phosphate dehydrogenase, aldolase, and transketolase activity to support photosynthetic CO2 fixation at observed rates. These results suggest that there may be direct transfer of glyceraldehyde 3-phosphate among these enzymes in the pea chloroplast.
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Marques IA, Anderson LE. Effects of Arsenite, Sulfite, and Sulfate on Photosynthetic Carbon Metabolism in Isolated Pea (Pisum sativum L., cv Little Marvel) Chloroplasts. Plant Physiol 1986; 82:488-93. [PMID: 16665056 PMCID: PMC1056146 DOI: 10.1104/pp.82.2.488] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Photosynthetic CO(2)-fixation in isolated pea (Pisum sativum L., cv Little Marvel) chloroplasts during induction is markedly inhibited by 0.4 millimolar sulfite. Sulfate at the same concentration has almost no effect. The (14)CO(2)-fixation pattern indicates that the primary effect of sulfite is inhibition of the reaction catalyzed by ribulose bisphosphate carboxylase and a stimulation of export of intermediates out of the chloroplasts. Inhibition of light modulation of stromal enzyme activity does not appear to account for the toxicity of SO(2) in this Pisum variety. Arsenite at 0.2 millimolar concentrations inhibits light activation and inhibits photosynthetic CO(2) fixation. The (14)CO(2)-fixation pattern indicates that the primary effect of arsenite is inhibition of light activation of reductive pentose phosphate pathway enzyme activity.
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Affiliation(s)
- I A Marques
- Department of Biological Sciences, University of Illinois at Chicago, Box 4348, Chicago, Illinois 60680
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Marques IA, Anderson LE. Changing Kinetic Properties of Fructose-1,6-bisphosphatase from Pea Chloroplasts during Photosynthetic Induction. Plant Physiol 1985; 77:807-10. [PMID: 16664142 PMCID: PMC1064610 DOI: 10.1104/pp.77.4.807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
After dark-light transitions, there is a delay in photosynthetic CO(2) fixation by isolated pea chloroplasts in the range of some minutes. In order to assess the physiological significance of light modulation of enzyme activity in the control of induction, we made estimates of the kinetic parameters of fructose-1,6-bisphosphatase immediately upon release from pea chloroplasts in the dark and after illumination for various time periods. The Michaelis constant for fructose-1,6-bisphosphate decreased and maximal velocities increased during induction. It seems likely that light activation of this enzyme is one of the factors contributing to the overcoming of the lag period in photosynthetic CO(2) fixation.
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Affiliation(s)
- I A Marques
- Department of Biological Sciences, University of Illinois at Chicago, Box 4348, Chicago, Illinois 60680
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Marques IA, Oberholzer MJ, Erismann KH. Effects of Different Inorganic Nitrogen Sources on Photosynthetic Carbon Metabolism in Primary Leaves of Non-nodulated Phaseolus vulgaris L. Plant Physiol 1983; 71:555-61. [PMID: 16662866 PMCID: PMC1066077 DOI: 10.1104/pp.71.3.555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Young bean plants (Phaseolus vulgaris L. var Saxa) were fed with three different types of inorganic nitrogen, after being grown on nitrogen-free nutrient solution for 8 days. The pattern of (14)CO(2) fixation was investigated in photosynthesizing primary leaf discs of 11-day-old plants (3 days with nitrogen source) and in a pulse-chase experiment in 13-day-old plants (5 days with nitrogen source).Ammonium caused, in contrast to nitrate nutrition, a higher level of (14)C incorporation into sugar phosphates but a lower incorporation of label into malate, glycolate, glycerate, aspartate, and alanine. The labeling kinetics of glycine and serine were little changed by the nitrogen source. Ammonium feeding also produced an increase in the ratio of extractable activities of ribulose-1,5-bisphosphate carboxylase to phosphoenolpyruvate carboxylase and an increase in dark respiration and the CO(2) compensation concentration. Net photosynthesis was higher in plants assimilating nitrate.The results point to stimulated turnover of the photosynthetic carbon reduction cycle metabolites, reduced phosphoenolpyruvate carboxylation, and altered turnover rates within the photosynthetic carbon oxidation cycle in ammonium-fed plants. Mechanisms of the regulation of primary carbon metabolism are proposed and discussed.
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Affiliation(s)
- I A Marques
- Pflanzenphysiologisches Institut der Universität Bern, Bern, Switzerland
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