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Bracchi I, Guimarães J, Rodrigues C, Azevedo R, Coelho CM, Pinheiro C, Morais J, Barreiros-Mota I, Fernandes VC, Delerue-Matos C, Pinto E, Moreira-Rosário A, de Azevedo LFR, Dias CC, Lima J, Sapinho I, Ramalho C, Calhau C, Leite JC, Almeida A, Pestana D, Keating E. Essential Trace Elements Status in Portuguese Pregnant Women and Their Association with Maternal and Neonatal Outcomes: A Prospective Study from the IoMum Cohort. Biology (Basel) 2023; 12:1351. [PMID: 37887061 PMCID: PMC10604833 DOI: 10.3390/biology12101351] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/16/2023] [Accepted: 10/13/2023] [Indexed: 10/28/2023]
Abstract
Cobalt (Co), copper (Cu), manganese (Mn), molybdenum (Mo), and zinc (Zn) are essential trace elements (ETEs) and important cofactors for intermediary metabolism or redox balance. These ETEs are crucial during pregnancy, their role on specific pregnancy outcomes is largely unknown. This prospective study (#NCT04010708) aimed to assess urinary levels of these ETEs in pregnancy and to evaluate their association with pregnancy outcomes. First trimester pregnant women of Porto and Lisbon provided a random spot urine sample, and sociodemographic and lifestyle data. Clinical data were obtained from clinical records. Urinary ETEs were quantified by inductively coupled plasma mass spectrometry (ICP-MS). A total of 635 mother:child pairs were included. Having urinary Zn levels above the 50th percentile (P50) was an independent risk factor for pre-eclampsia (PE) (aOR [95% CI]: 5.350 [1.044-27.423], p = 0.044). Urinary Zn levels above the P50 decreased the risk of small for gestational age (SGA) birth head circumference (aOR [95% CI]: 0.315 [0.113-0.883], p = 0.028), but it increased the risk SGA length (aOR [95% CI]: 2.531 [1.057-6.062], p = 0.037). This study may provide valuable information for public health policies related to prenatal nutrition, while informing future efforts to de-fine urinary reference intervals for ETEs in pregnant women.
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Affiliation(s)
- Isabella Bracchi
- Unit of Biochemistry, Department Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS, Center for Health Technology and Services Research, 4200-319 Porto, Portugal
| | - Juliana Guimarães
- Unit of Biochemistry, Department Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS, Center for Health Technology and Services Research, 4200-319 Porto, Portugal
| | - Catarina Rodrigues
- CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, 1150-082 Lisbon, Portugal
| | - Rui Azevedo
- LAQV/REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Cláudia Matta Coelho
- Unit of Biochemistry, Department Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS, Center for Health Technology and Services Research, 4200-319 Porto, Portugal
| | - Cátia Pinheiro
- Unit of Biochemistry, Department Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS, Center for Health Technology and Services Research, 4200-319 Porto, Portugal
| | - Juliana Morais
- CINTESIS@RISE, Nutrition & Metabolism, NOVA Medical School|FCM, NOVA University Lisbon, 1169-056 Lisbon, Portugal
- UniC@RISE, Unidade de Investigação e Desenvolvimento Cardiovascular, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
| | - Inês Barreiros-Mota
- CINTESIS@RISE, Nutrition & Metabolism, NOVA Medical School|FCM, NOVA University Lisbon, 1169-056 Lisbon, Portugal
| | - Virgínia Cruz Fernandes
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal
| | - Edgar Pinto
- LAQV/REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- Departamento de Saúde Ambiental, Escola Superior de Saúde, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 400, 4200-072 Porto, Portugal
| | - André Moreira-Rosário
- CINTESIS@RISE, Nutrition & Metabolism, NOVA Medical School|FCM, NOVA University Lisbon, 1169-056 Lisbon, Portugal
| | - Luís Filipe Ribeiro de Azevedo
- CINTESIS@RISE, Department of Community Medicine, Information and Health Decision Sciences (MEDCIDS), Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Cláudia Camila Dias
- CINTESIS@RISE, Department of Community Medicine, Information and Health Decision Sciences (MEDCIDS), Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Jorge Lima
- CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, 1150-082 Lisbon, Portugal
- Immunology, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, 1169-056 Lisboa, Portugal
- Department of Obstetrics and Gynecology, Hospital da Luz Lisboa, 1500-650 Lisboa, Portugal
| | - Inês Sapinho
- Endocrinology Service, CUF Descobertas Hospital, 1998-018 Lisbon, Portugal
| | - Carla Ramalho
- Department of Obstetrics, São João Hospital Center, 4200-319 Porto, Portugal
- Department of Ginecology-Obstetrics and Pediatrics, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Institute for Research and Innovation in Health, i3S, University of Porto, 4200-135 Porto, Portugal
| | - Conceição Calhau
- CINTESIS@RISE, Nutrition & Metabolism, NOVA Medical School|FCM, NOVA University Lisbon, 1169-056 Lisbon, Portugal
| | - João Costa Leite
- CINTESIS@RISE, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Agostinho Almeida
- LAQV/REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Diogo Pestana
- CINTESIS@RISE, Nutrition & Metabolism, NOVA Medical School|FCM, NOVA University Lisbon, 1169-056 Lisbon, Portugal
| | - Elisa Keating
- Unit of Biochemistry, Department Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS@RISE, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
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Guimarães J, Bracchi I, Pinheiro C, Moreira NX, Coelho CM, Pestana D, Prucha MDC, Martins C, Domingues VF, Delerue-Matos C, Dias CC, Azevedo LFR, Calhau C, Leite JC, Ramalho C, Keating E, Fernandes VC. Association of 3-Phenoxybenzoic Acid Exposure during Pregnancy with Maternal Outcomes and Newborn Anthropometric Measures: Results from the IoMum Cohort Study. Toxics 2023; 11:125. [PMID: 36851000 PMCID: PMC9958656 DOI: 10.3390/toxics11020125] [Citation(s) in RCA: 1] [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] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/16/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
The aims of this study were to characterize the exposure of pregnant women living in Portugal to 3-phenoxybenzoic acid (3-PBA) and to evaluate the association of this exposure with maternal outcomes and newborn anthropometric measures. We also aimed to compare exposure in summer with exposure in winter. Pregnant women attending ultrasound scans from April 2018 to April 2019 at a central hospital in Porto, Portugal, were invited to participate. Inclusion criteria were: gestational week between 10 and 13, confirmed fetal vitality, and a signature of informed consent. 3-PBA was measured in spot urine samples by gas chromatography with mass spectrometry (GC-MS). The median 3-PBA concentration was 0.263 (0.167; 0.458) µg/g creatinine (n = 145). 3-PBA excretion was negatively associated with maternal pre-pregnancy body mass index (BMI) (p = 0.049), and it was higher during the summer when compared to winter (p < 0.001). The frequency of fish or yogurt consumption was associated positively with 3-PBA excretion, particularly during the winter (p = 0.002 and p = 0.015, respectively), when environmental exposure is low. Moreover, 3-PBA was associated with levothyroxine use (p = 0.01), a proxy for hypothyroidism, which could be due to a putative 3-PBA-thyroid hormone antagonistic effect. 3-PBA levels were not associated with the anthropometric measures of the newborn. In conclusion, pregnant women living in Portugal are exposed to 3-PBA, particularly during summer, and this exposure may be associated with maternal clinical features.
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Affiliation(s)
- Juliana Guimarães
- CINTESIS@RISE, Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Isabella Bracchi
- CINTESIS@RISE, Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Cátia Pinheiro
- CINTESIS@RISE, Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Nara Xavier Moreira
- CINTESIS@RISE, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Department of Nutrition and Dietetics (MND), Faculty of Nutrition Emília de Jesus Ferreiro (FNEJF), Fluminense Federal University (UFF), Niterói 20010-010, RJ, Brazil
| | - Cláudia Matta Coelho
- CINTESIS@RISE, Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Diogo Pestana
- CINTESIS@RISE, Nutrition and Metabolism, NOVA Medical School│FCM, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Maria do Carmo Prucha
- Department of Obstetrics, Centro Hospitalar Universitário S. João, 4200-319 Porto, Portugal
| | - Cristina Martins
- Department of Obstetrics, Centro Hospitalar Universitário S. João, 4200-319 Porto, Portugal
| | - Valentina F. Domingues
- REQUIMTE/LAQV, Instituto Superior de Engenharia, Politécnico do Porto, 4249-015 Porto, Portugal
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia, Politécnico do Porto, 4249-015 Porto, Portugal
| | - Cláudia C. Dias
- CINTESIS@RISE, Department of Community Medicine, Information and Health Decision Sciences (MEDCIDS), Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Luís Filipe R. Azevedo
- CINTESIS@RISE, Department of Community Medicine, Information and Health Decision Sciences (MEDCIDS), Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Conceição Calhau
- CINTESIS@RISE, Nutrition and Metabolism, NOVA Medical School│FCM, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - João Costa Leite
- CINTESIS@RISE, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Carla Ramalho
- Department of Obstetrics, Centro Hospitalar Universitário S. João, 4200-319 Porto, Portugal
- Department of Ginecology-Obstetrics and Pediatrics, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, i3S, Universidade do Porto, 4200-135 Porto, Portugal
| | - Elisa Keating
- CINTESIS@RISE, Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Virgínia Cruz Fernandes
- REQUIMTE/LAQV, Instituto Superior de Engenharia, Politécnico do Porto, 4249-015 Porto, Portugal
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Matta Coelho C, Guimarães J, Bracchi I, Xavier Moreira N, Pinheiro C, Ferreira P, Pestana D, Barreiros Mota I, Cortez A, Prucha C, Martins C, Pinto E, Almeida A, Delerue-Matos C, Dias CC, Moreira-Rosário A, Ribeiro de Azevedo LF, Cruz Fernandes V, Ramalho C, Calhau C, Brantsæter AL, Costa Leite J, Keating E. Noncompliance to iodine supplementation recommendation is a risk factor for iodine insufficiency in Portuguese pregnant women: results from the IoMum cohort. J Endocrinol Invest 2022; 45:1865-1874. [PMID: 35635644 DOI: 10.1007/s40618-022-01813-7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 04/27/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE After a recommendation for iodine supplementation in pregnancy has been issued in 2013 in Portugal, there were no studies covering iodine status in pregnancy in the country. The aim of this study was to assess iodine status in pregnant women in Porto region and its association with iodine supplementation. METHODS A cross-sectional study was conducted at Centro Hospitalar Universitário São João, Porto, from April 2018 to April 2019. Pregnant women attending the 1st trimester ultrasound scan were invited to participate. Exclusion criteria were levothyroxine use, gestational age < 10 and ≥ 14 weeks, non-evolutive pregnancy at recruitment and non-signing of informed consent. Urinary iodine concentration (UIC) was measured in random spot urine by inductively coupled plasma-mass spectrometry. RESULTS Median UIC was 104 μg/L (IQR 62-189) in the overall population (n = 481) of which 19% had UIC < 50 µg/L. Forty three percent (n = 206) were not taking an iodine-containing supplement (ICS) and median UIC values were 146 µg/L (IQR 81-260) and 74 µg/L (IQR 42-113) in ICS users and non-users, respectively (p < 0.001). Not using an ICS was an independent risk factor for iodine insufficiency [adjusted OR (95% CI) = 6.00 (2.74, 13.16); p < 0.001]. Iodised salt use was associated with increased median iodine-to-creatinine ratio (p < 0.014). CONCLUSIONS A low compliance to iodine supplementation recommendation in pregnancy accounted for a mild-to-moderately iodine deficiency. Our results evidence the need to support iodine supplementation among pregnant women in countries with low household coverage of iodised salt. Trial registration number NCT04010708, registered on the 8th July 2019.
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Affiliation(s)
- C Matta Coelho
- CINTESIS@RISE, Department Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal
| | - J Guimarães
- CINTESIS@RISE, Department Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal
| | - I Bracchi
- CINTESIS@RISE, Department Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal
| | - N Xavier Moreira
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Porto, Portugal
- Fluminense Federal University, Niterói, Rio de Janeiro, Brasil
| | - C Pinheiro
- CINTESIS@RISE, Department Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal
| | - P Ferreira
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
| | - D Pestana
- CINTESIS@RISE, Nutrition and Metabolism, NOVA Medical School│FCM, Universidade Nova de Lisboa, Porto, Portugal
| | - I Barreiros Mota
- CINTESIS@RISE, Nutrition and Metabolism, NOVA Medical School│FCM, Universidade Nova de Lisboa, Porto, Portugal
| | - A Cortez
- Medicina Laboratorial Dr. Carlos Torres, Porto, Portugal
| | - C Prucha
- Department of Obstetrics, Centro Hospitalar Universitário S. João, Porto, Portugal
| | - C Martins
- Department of Obstetrics, Centro Hospitalar Universitário S. João, Porto, Portugal
| | - E Pinto
- REQUIMTE//LAQV, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
- Department of Environmental Health, School of Health, P.Porto, Porto, Portugal
| | - A Almeida
- REQUIMTE//LAQV, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - C Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia, Politécnico do Porto, Porto, Portugal
| | - C C Dias
- CINTESIS@RISE, Department of Community Medicine, Information and Health Decision Sciences (MEDCIDS), Faculty of Medicine, University of Porto, Porto, Portugal
| | - A Moreira-Rosário
- CINTESIS@RISE, Nutrition and Metabolism, NOVA Medical School│FCM, Universidade Nova de Lisboa, Porto, Portugal
| | - L F Ribeiro de Azevedo
- CINTESIS@RISE, Department of Community Medicine, Information and Health Decision Sciences (MEDCIDS), Faculty of Medicine, University of Porto, Porto, Portugal
| | - V Cruz Fernandes
- REQUIMTE/LAQV, Instituto Superior de Engenharia, Politécnico do Porto, Porto, Portugal
| | - C Ramalho
- Department of Obstetrics, Centro Hospitalar Universitário S. João, Porto, Portugal
- Department of Ginecology-Obstetrics and Pediatrics, Faculty of Medicine, University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, i3S, Universidade Do Porto, Porto, Portugal
| | - C Calhau
- CINTESIS@RISE, Nutrition and Metabolism, NOVA Medical School│FCM, Universidade Nova de Lisboa, Porto, Portugal
| | - A-L Brantsæter
- Division of Climate and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - J Costa Leite
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Porto, Portugal
| | - E Keating
- CINTESIS@RISE, Department Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal.
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Mendes A, Pereira H, Liu P, Miranda H, Romao R, Noronha C, Rocha L, Pinheiro C, Rosendo E, Freitas Magalhães M, Moreira R, Pereira Amorim M, Sousa M, Malheiro Sarmento T, Ferreira Araujo A. 305P The role of surgery in addition to chemotherapy in the second-line treatment of glioblastomas. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Araujo GS, Pinheiro C, Pestana JLT, Soares AMVM, Abessa DMS, Loureiro S. Toxicity of lead and mancozeb differs in two monophyletic Daphnia species. Ecotoxicol Environ Saf 2019; 178:230-238. [PMID: 31026744 DOI: 10.1016/j.ecoenv.2019.03.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 02/08/2019] [Accepted: 03/23/2019] [Indexed: 06/09/2023]
Abstract
Lead and mancozeb are two important chemicals used for different human purposes and activities worldwide. Hazard assessment in different areas of the world is carried out with different but phylogenetically similar species, adapted to different climatic conditions, in order to increase relevance. This study evaluated the sensitivity of two monophyletic species, the tropical species Daphnia similis and the temperate species Daphnia magna, to the two chemicals lead and mancozeb. Standard acute and chronic ecotoxicological tests (reproduction and growth), as well as other sublethal measurements such as the intrinsic rate of population increase (r), feeding rate (FR) and O2 consumption, were recorded along with the analysis of the AChE activity to determine the neurotoxicity of both contaminants. Albeit their similar evolutionary status, D. magna generally presented a lower sensitivity to Pb in comparison to D. similis. Despite the differences in sensitivity, both species presented similar patterns of response under Pb exposure, with diminished reproductive outputs, feeding impairment, reduced O2 consumption and no effect on AChE activity. Mancozeb decreased the reproduction, rate of population increase and feeding rate, increased the AChE activity in both species and increased O2 consumption only in D. magna. While D. magna increased O2 consumption under mancozeb exposure, no effects were observed for D. similis. Thus, species may present different responses and sensitivities to different pollutants, regardless of their phylogeny. Therefore, the use of ecotoxicological assays with native species is crucial for a better ecological risk assessment in contaminated areas.
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Affiliation(s)
- G S Araujo
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal.
| | - C Pinheiro
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
| | - J L T Pestana
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
| | - A M V M Soares
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
| | - D M S Abessa
- NEPEA, Campus do Litoral Paulista, Universidade Estadual Paulista Júlio de Mesquita Filho, Praça Infante Dom Henrique, s/n, CP 11330-900, São Vicente, SP, Brazil
| | - S Loureiro
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
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Bonatelli M, Salis VV, Oliveira ÉA, Stuchi Maria-Engler S, Baltazar F, De Lima Vazquez V, Pinheiro C. PO-222 Targeting cancer cell metabolism in melanomas: metabolic profiling and 3-bromopyruvate sensitivity screening. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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7
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Adubeiro R, Antunes A, Pinheiro C, Santos P, Cardoso J, Pereira-Leal J, Gil OM, Rodrigues A, Rueff J, Nunes da Silva S. PO-020 Functional characterisation of variant of unknown significate in familial breast cancer. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Rodrigues L, Costa G, Cordeiro C, Pinheiro C, Amado F, Lamy E. Salivary proteome and glucose levels are related with sweet taste sensitivity in young adults. Food Nutr Res 2017; 61:1389208. [PMID: 31139039 PMCID: PMC6516793 DOI: 10.1080/16546628.2017.1389208] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 05/28/2017] [Accepted: 10/04/2017] [Indexed: 12/01/2022] Open
Abstract
Sweet taste plays a critical role in determining food preferences and choices. Similar to what happens for other oral sensations, individuals differ in their sensitivity for sweet taste and these inter-individual differences may be responsible for variations in food acceptance. Despite evidence that saliva plays a role in taste perception, this fluid has been mainly studied in the context of bitterness or astringency. We investigated the possible relationship between sweet taste sensitivity and salivary composition in subjects with different sucrose detection thresholds. Saliva collected from 159 young adults was evaluated for pH, total protein concentration and glucose. One- and bi-dimensional electrophoresis (2-DE) were performed and protein profiles compared between sweet sensitivity groups, with proteins that were differently expressed being identified by MALDI-FTICR-MS. Moreover, Western blotting was performed for salivary carbonic anhydrase VI (CA-VI) and cystatins and salivary amylase enzymatic activity was assessed in order to compare groups. Females with low sensitivity to sweet taste had higher salivary concentrations of glucose compared to those with sensitivity. For protein profiles, some differences were sex-dependent, with higher levels of α-amylase and CA-VI in low-sensitivity individuals and higher levels of cystatins in sensitive ones for both sexes. Body mass index was not observed to affect the association between salivary proteome and taste sensitivity. To our knowledge, these are the first data showing an association between sweet taste and saliva proteome.
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Affiliation(s)
- L Rodrigues
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
| | - G Costa
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - C Cordeiro
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - C Pinheiro
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal.,Departamento de Zootecnia, Escola de Ciências e Tecnologia, Universidade de Évora, Évora, Portugal
| | - F Amado
- Departamento de Química, Universidade de Aveiro, Aveiro, Portugal.,Química Orgânica, Produtos Naturais e Agro-Alimentares (QOPNA), Universidade de Aveiro, Aveiro, Portugal
| | - E Lamy
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
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9
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Ribeiro IC, Leclercq CC, Simões N, Toureiro A, Duarte I, Freire JB, Chaves MM, Renaut J, Pinheiro C. Identification of chickpea seed proteins resistant to simulated in vitro human digestion. J Proteomics 2017; 169:143-152. [PMID: 28634118 DOI: 10.1016/j.jprot.2017.06.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 01/23/2017] [Revised: 04/20/2017] [Accepted: 06/12/2017] [Indexed: 12/30/2022]
Abstract
Proteins and peptides able to resist gastrointestinal digestion and reach the intestinal mucosa have the potential to influence human health. Chickpea (Cicer arietinum L.) seed proteins are able to resist cooking (86.9% total protein) and/or in vitro simulated human digestion (15.9% total protein resists soaking, cooking and digestion with pepsin and pancreatin). To identify and characterize proteins resisting digestion we made use of different MS methodologies. The efficiency of several proteases (trypsin, AspN, chymotrypsin and LysC) was tested, and two technologies were employed (MALDI-MS/MS and LC-nESI-MS/MS). Digestion with trypsin and AspN were most successful for the identification of seed proteins. When analyzed by MALDI- MS/MS, trypsin allowed the identification of at least one protein in 60% of the polypeptide bands, while AspN allows the identification in 48%. The use of LC-nESI-MS/MS, allowed the identification of much more proteins/polypeptides from digested seeds (232 vs 17 using trypsin). The majority of the proteins found to be able to resist simulated digestion were members of the 7S vicilin and 11S legumin seed storage protein classes, which are reported to contain bio-active functions. In addition, we have found proteins that had not yet been described as potentially able to cause an impact on human health. SIGNIFICANCE This is the first proteomic study to analyze the effect of processing and simulated human gastrointestinal digestion on the proteome of chickpea seed. Chickpea is reported to have anti-nutritional effects as well as nutraceutical properties, so the identification and characterization of the proteins able to resist digestion is crucial to understand the targets underlying such properties.
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Affiliation(s)
- I C Ribeiro
- Instituto de Tecnologia Química e Biológica, Universidade NOVA de Lisboa, Av. da República, EAN, 2781-901 Oeiras, Portugal
| | - C C Leclercq
- Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Forneaux, L-4362 Esch/Alzette, Luxembourg
| | - N Simões
- INIAV, Elvas, Apartado 6, 7350-951 Elvas, Portugal
| | - A Toureiro
- INIAV, Elvas, Apartado 6, 7350-951 Elvas, Portugal
| | - I Duarte
- INIAV, Elvas, Apartado 6, 7350-951 Elvas, Portugal
| | - J B Freire
- LEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - M M Chaves
- Instituto de Tecnologia Química e Biológica, Universidade NOVA de Lisboa, Av. da República, EAN, 2781-901 Oeiras, Portugal
| | - J Renaut
- Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Forneaux, L-4362 Esch/Alzette, Luxembourg
| | - C Pinheiro
- Instituto de Tecnologia Química e Biológica, Universidade NOVA de Lisboa, Av. da República, EAN, 2781-901 Oeiras, Portugal; DCV - Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
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10
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Chaves MM, Costa JM, Zarrouk O, Pinheiro C, Lopes CM, Pereira JS. Controlling stomatal aperture in semi-arid regions-The dilemma of saving water or being cool? Plant Sci 2016; 251:54-64. [PMID: 27593463 DOI: 10.1016/j.plantsci.2016.06.015] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 06/14/2016] [Accepted: 06/22/2016] [Indexed: 05/24/2023]
Abstract
Stomatal regulation of leaf gas exchange with the atmosphere is a key process in plant adaptation to the environment, particularly in semi-arid regions with high atmospheric evaporative demand. Development of stomata, integrating internal signaling and environmental cues sets the limit for maximum diffusive capacity of stomata, through size and density and is under a complex genetic control, thus providing multiple levels of regulation. Operational stomatal conductance to water vapor and CO2 results from feed-back and/or feed-forward mechanisms and is the end-result of a plethora of signals originated in leaves and/or in roots at each moment. CO2 assimilation versus water vapor loss, proposed to be the subject of optimal regulation, is species dependent and defines the water use efficiency (WUE). WUE has been a topic of intense research involving areas from genetics to physiology. In crop plants, especially in semi-arid regions, the question that arises is how the compromise of reducing transpiration to save water will impact on plant performance through leaf temperature. Indeed, plant transpiration by providing evaporative cooling, is a major component of the leaf energy balance. In this paper we discuss the dilemma of 'saving water or being cool' bringing about recent findings from molecular genetics, to development and physiology of stomata. The question of 'how relevant is screening for high/low WUE in crops for semi-arid regions, where drought and heat co-occur' is discussed.
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Affiliation(s)
- M M Chaves
- Plant Molecular Physiology Laboratory, ITQBNOVA, Universidade Nova de Lisboa, Oeiras, Portugal.
| | - J M Costa
- Plant Molecular Physiology Laboratory, ITQBNOVA, Universidade Nova de Lisboa, Oeiras, Portugal; LEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, Lisboa, Portugal
| | - O Zarrouk
- Plant Molecular Physiology Laboratory, ITQBNOVA, Universidade Nova de Lisboa, Oeiras, Portugal
| | - C Pinheiro
- Plant Molecular Physiology Laboratory, ITQBNOVA, Universidade Nova de Lisboa, Oeiras, Portugal; Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica 2829-516, Portugal
| | - C M Lopes
- LEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, Lisboa, Portugal
| | - J S Pereira
- LEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, Lisboa, Portugal
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11
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Sá A, Pinheiro C, Seixas-Martins J, Cunha L. La técnica de Charles en el tratamiento del linfedema secundario crónico del dorso del pie: caso clínico. Cir plást iberolatinoam 2015. [DOI: 10.4321/s0376-78922015000400013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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12
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Baltazar F, Pinheiro C, Morais-Santos F, Azevedo-Silva J, Queirós O, Preto A, Casal M. Monocarboxylate transporters as targets and mediators in cancer therapy response. Histol Histopathol 2014; 29:1511-24. [PMID: 24921258 DOI: 10.14670/hh-29.1511] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Monocarboxylate transporters (MCTs) belong to a family of transporters, encoded by the SLC16 gene family, which is presently composed by 14 members, but only MCT1 to 4 have been biochemically characterized. They have important functions in healthy tissues, being involved in the transmembrane transport of lactic acid and other monocarboxylic acids in human cells. One of the recently recognized hallmarks of cancer is altered metabolism, with high rates of glucose consumption and consequent lactate production. To maintain this metabolic phenotype, cancer cells upregulate a series of plasma membrane proteins, including MCTs. MCT1 and MCT4, in particular, play a dual role in the maintenance of the metabolic phenotype of tumour cells. On one hand, they facilitate the efflux of lactate and, on the other hand, they contribute to the preservation of the intracellular pH, by co-transporting a proton. Thus, MCTs are attractive targets in cancer therapy, especially in cancers with a hyper-glycolytic and acid-resistant phenotype. Recent evidence demonstrates that MCTs are involved in cancer cell uptake of chemotherapeutic agents, including 3-bromopyruvate. In this way MCTs can act as "Trojan horses", as their elevated expression in cancer cells can mediate the entry of this chemotherapeutic agent into the cells and selectively kill cancer cells. As a result, MCTs will be mediators of chemotherapeutic response, and their expression can be used as a molecular marker to predict response to chemotherapy.
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Affiliation(s)
- F Baltazar
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, and CVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - C Pinheiro
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal, Barretos School of Health Sciences, Dr. Paulo Prata - FACISB, and Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Sao Paulo, Brazil
| | - F Morais-Santos
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, and CVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - J Azevedo-Silva
- CBMA - Center of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
| | - O Queirós
- CBMA - Center of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, Braga, and CESPU, Instituto de Investigação e Formação Avançada em Ciéncias e Tecnologias da Saúde, Gandra PRD, Portugal
| | - A Preto
- CBMA - Center of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
| | - M Casal
- CBMA - Center of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
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13
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Pinheiro C, Roque R, Adriano A, Mendes P, Praça M, Reis I, Pereira T, Srebotnik Kirbis I, André S. Optimization of immunocytochemistry in cytology: comparison of two protocols for fixation and preservation on cytospin and smear preparations. Cytopathology 2014; 26:38-43. [DOI: 10.1111/cyt.12156] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2014] [Indexed: 12/16/2022]
Affiliation(s)
- C. Pinheiro
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
| | - R. Roque
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
- Lisbon School of Health Technology; Lisbon Portugal
| | - A. Adriano
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
| | - P. Mendes
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
| | - M. Praça
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
- Polytechnic Institute of Porto; Porto Portugal
| | - I. Reis
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
| | - T. Pereira
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
| | - I. Srebotnik Kirbis
- Institute of Pathology; Faculty of Medicine; University of Ljubljana; Ljubljana Slovenia
| | - S. André
- Department of Anatomic Pathology; Portuguese Oncology Institute Francisco Gentil, EPE; Lisbon Portugal
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14
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Vieira M, Pinheiro C, Fernandes R, Noronha JP, Prudêncio C. Antimicrobial activity of quinoxaline 1,4-dioxide with 2- and 3-substituted derivatives. Microbiol Res 2013; 169:287-93. [PMID: 23928379 DOI: 10.1016/j.micres.2013.06.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [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: 04/09/2013] [Revised: 06/11/2013] [Accepted: 06/12/2013] [Indexed: 10/26/2022]
Abstract
Quinoxaline is a chemical compound that presents a structure that is similar to quinolone antibiotics. The present work reports the study of the antimicrobial activity of quinoxaline N,N-dioxide and some derivatives against bacterial and yeast strains. The compounds studied were quinoxaline-1,4-dioxide (QNX), 2-methylquinoxaline-1,4-dioxide (2MQNX), 2-methyl-3-benzoylquinoxaline-1,4-dioxide (2M3BenzoylQNX), 2-methyl-3-benzylquinoxaline-1,4-dioxide (2M3BQNX), 2-amino-3-cyanoquinoxaline-1,4-dioxide (2A3CQNX), 3-methyl-2-quinoxalinecarboxamide-1,4-dioxide (3M2QNXC), 2-hydroxyphenazine-N,N-dioxide (2HF) and 3-methyl-N-(2-methylphenyl)quinoxalinecarboxamide-1,4-dioxide (3MN(2MF)QNXC). The prokaryotic strains used were Staphylococcus aureus ATCC 6538, S. aureus ATCC 6538P, S. aureus ATCC 29213, Escherichia coli ATCC 25922, E. coli S3R9, E. coli S3R22, E. coli TEM-1 CTX-M9, E. coli TEM-1, E. coli AmpC Mox-2, E. coli CTX-M2 e E. coli CTX-M9. The Candida albicans ATCC 10231 and Saccharomyces cerevisiae PYCC 4072 were used as eukaryotic strains. For the compounds that presented activity using the disk diffusion method, the minimum inhibitory concentration (MIC) was determined. The alterations of cellular viability were evaluated in a time-course assay. Death curves for bacteria and growth curves for S. cerevisiae PYCC 4072 were also accessed. The results obtained suggest potential new drugs for antimicrobial activity chemotherapy since the MIC's determined present low values and cellular viability tests show the complete elimination of the bacterial strain. Also, the cellular viability tests for the eukaryotic model, S. cerevisiae, indicate low toxicity for the compounds tested.
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Affiliation(s)
- Mónica Vieira
- REQUIMTE/CQFB, Departamento de Química, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; Ciências Químicas e das Biomoléculas, Centro de Investigação em Saúde e Ambiente, Escola Superior de Tecnologias da Saúde, Instituto Politécnico do Porto, Rua Valente Perfeito, 322, 4400-330 Vila Nova de Gaia, Portugal.
| | - Cátia Pinheiro
- Ciências Químicas e das Biomoléculas, Centro de Investigação em Saúde e Ambiente, Escola Superior de Tecnologias da Saúde, Instituto Politécnico do Porto, Rua Valente Perfeito, 322, 4400-330 Vila Nova de Gaia, Portugal
| | - Rúben Fernandes
- Ciências Químicas e das Biomoléculas, Centro de Investigação em Saúde e Ambiente, Escola Superior de Tecnologias da Saúde, Instituto Politécnico do Porto, Rua Valente Perfeito, 322, 4400-330 Vila Nova de Gaia, Portugal; Centro de Farmacologia e Biopatologia Química (U38-FCT), Faculdade de Medicina, Universidade do Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
| | - João Paulo Noronha
- REQUIMTE/CQFB, Departamento de Química, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Cristina Prudêncio
- Ciências Químicas e das Biomoléculas, Centro de Investigação em Saúde e Ambiente, Escola Superior de Tecnologias da Saúde, Instituto Politécnico do Porto, Rua Valente Perfeito, 322, 4400-330 Vila Nova de Gaia, Portugal; Centro de Farmacologia e Biopatologia Química (U38-FCT), Faculdade de Medicina, Universidade do Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal; CHUC, Centro Hospitalar da Universidade de Coimbra, Coimbra, Portugal
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Robichon C, Annereau JP, Gomes B, Pillon A, de Vries L, Cussac D, Meyer N, Lamant L, Kruczynski A, Guilbaud N, Kluza J, Jendoubi M, Corazao-Rozas P, Andre F, Jonneaux A, Guerreschi P, Formstecher P, Mortier L, Marchetti PHI, Bozkurt E, Atmaca H, Uzunoglu S, Uslu R, Karaca B, Erenpreisa J, Jackson TR, Huna A, Salmina K, Innashkina I, Jankevics E, Townsend PA, Cragg MS, Atmaca H, Bozkurt E, Uzunoglu S, Uslu R, Karaca B, Ramos SP, Bin M, Neto MDS, Curvello R, de Souza ACS, Nunes M, Weiswald LB, Vrignaud P, Vacher S, Turlotte E, Richon S, Roman-Roman S, Bieche I, Dangles-Marie V, Morais-Santos F, Pinheiro C, Vieira A, Schmitt F, Paredes J, Baltazar F, Zhang T, Lee YW, Rui YF, Cheng TY, Li G, Sreelatha KH, Reshma RS, Veena S, Rakesh SN, Thara S, Jem P, Priya S, Veena S, Sreelatha KH, Reshma RS, Rakesh SN, Priya S. Poster session 5. Translational research. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Morais-Santos F, Pinheiro C, Vieira A, Schmitt F, Paredes J, Baltazar F. Contribution of Monocarboxylate Transporters to the Aggressive Phenotype of Breast Cancer. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt047.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Valente D, Cunha A, Pinheiro C, Baltazar F, Moreira R, Queirós O. Effect of efflux pumps expression and cell bioenergetics in the multidrug resistance phenotype in cancer cells. Exp Clin Endocrinol Diabetes 2012. [DOI: 10.1055/s-0032-1330830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Pacheco A, Queirós O, Preto A, Pinheiro C, Azevedo-Silva J, Moreira R, Pedro M, Baltazar F, Casal M. 3-bromopyruvate cytotoxic effect in breast cancer cells is dependent of monocarboxylate transporters (MCT) expression and is enhanced by butyrate. Exp Clin Endocrinol Diabetes 2012. [DOI: 10.1055/s-0032-1330817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Pinheiro C, Santos F, Miranda-Goncalves V, Boccardo E, Lepique A, Longatto-Filho A, Villa L, Baltazar F. 469 Role of Monocarboxylate Transporters (MCTs) in the Regulation of the Metabolic Profile of Cervical Cancer Cells by Hypoxia. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71142-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Santos F, Pinheiro C, Miranda-Goncalves V, Vieira A, Paredes J, Schmitt F, Baltazar F. 453 Regulation of the Metabolic Profile of Breast Cancer Cells by Hypoxia. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71126-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Miranda-Gonçalves V, Honavar M, Pinheiro C, Reis R, Baltazar F. 462 MCT1 Plasma Membrane Expression is Associated to Hypoxic Regions in Glioblastomas. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71135-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Pinheiro C, Sousa B, Albergaria A, Paredes J, Dufloth R, Vieira D, Schmitt F, Baltazar F. GLUT1 and CAIX expression profiles in breast cancer correlate with adverse prognostic factors and MCT1 overexpression. Histol Histopathol 2011; 26:1279-86. [PMID: 21870331 DOI: 10.14670/hh-26.1279] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The goal of the present work was to evaluate the correlation of glucose transporter 1 (GLUT1) and carbonic anhydrase IX (CAIX) with the monocarboxylate transporters 1 (MCT1) and 4 (MCT4) and their chaperone, CD147, in breast cancer. The clinico-pathological value of GLUT1 and CAIX was also evaluated. For that, we analysed the immunohistochemical expression of GLUT1 and CAIX, in a large series of invasive breast carcinoma samples (n=124), previously characterized for MCT1, MCT4 and CD147 expression. GLUT1 expression was found in 46% of the cases (57/124), while CAIX was found in 18% of the cases (22/122). Importantly, both MCT1 and CD147, but not MCT4, were associated with GLUT1 and CAIX expression. Also, GLUT1 and CAIX correlated with each other. Concerning the clinico-pathological values, GLUT1 was associated with high grade tumours, basal-like subtype, absence of progesterone receptor, presence of vimentin and high proliferative index as measured by Ki-67. Additionally, CAIX was associated with large tumour size, high histological grade, basal-like subtype, absence of estrogen and progesterone receptors and presence of basal cytokeratins and vimentin expression. Finally, patients with CAIX positive tumours had a significantly shorter disease-free survival. The association between MCT1 and both GLUT1 and CAIX may result from hypoxia-mediated metabolic adaptations, which confer a glycolytic, acid-resistant and more aggressive phenotype to cancer cells.
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Affiliation(s)
- C Pinheiro
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal
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Alves M, Moes S, Jenö P, Pinheiro C, Passarinho J, Ricardo C. The analysis of Lupinus albus root proteome revealed cytoskeleton altered features due to long-term boron deficiency. J Proteomics 2011; 74:1351-63. [DOI: 10.1016/j.jprot.2011.03.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 02/25/2011] [Accepted: 03/01/2011] [Indexed: 11/29/2022]
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Abstract
Photosynthesis is one of the key processes to be affected by water deficits, via decreased CO2 diffusion to the chloroplast and metabolic constraints. The relative impact of those limitations varies with the intensity of the stress, the occurrence (or not) of superimposed stresses, and the species we are dealing with. Total plant carbon uptake is further reduced due to the concomitant or even earlier inhibition of growth. Leaf carbohydrate status, altered directly by water deficits or indirectly (via decreased growth), acts as a metabolic signal although its role is not totally clear. Other relevant signals acting under water deficits comprise: abscisic acid (ABA), with an impact on stomatal aperture and the regulation at the transcription level of a large number of genes related to plant stress response; other hormones that act either concurrently (brassinosteroids, jasmonates, and salycilic acid) or antagonistically (auxin, cytokinin, or ethylene) with ABA; and redox control of the energy balance of photosynthetic cells deprived of CO2 by stomatal closure. In an attempt to systematize current knowledge on the complex network of interactions and regulation of photosynthesis in plants subjected to water deficits, a meta-analysis has been performed covering >450 papers published in the last 15 years. This analysis shows the interplay of sugars, reactive oxygen species (ROS), and hormones with photosynthetic responses to drought, involving many metabolic events. However, more significantly it highlights (i) how fragmented and often non-comparable the results are and (ii) how hard it is to relate molecular events to plant physiological status, namely photosynthetic activity, and to stress intensity. Indeed, the same data set usually does not integrate these different levels of analysis. Considering these limitations, it was hard to find a general trend, particularly concerning molecular responses to drought, with the exception of the genes ABI1 and ABI3. These genes, irrespective of the stress type (acute versus chronic) and intensity, show a similar response to water shortage in the two plant systems analysed (Arabidopsis and barley). Both are associated with ABA-mediated metabolic responses to stress and the regulation of stomatal aperture. Under drought, ABI1 transcription is up-regulated while ABI3 is usually down-regulated. Recently ABI3 has been hypothesized to be essential for successful drought recovery.
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Affiliation(s)
- C Pinheiro
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av da República-EAN, 2780-157 Oeiras, Portugal
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Pinheiro C, Pinheiro S, Bocardo E, Lepique A, Longatto-Filho A, Villa L, Baltazar F. 351 Inhibition of monocarboxylate transporter 1 in cervical cancer cells: effect of alpha-cyano-4-hydroxycinnamate and siRNA. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)72058-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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26
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Costa B, Viana-Pereira M, Costa S, Lima J, Soares P, Amorim J, Linhares P, Pinheiro C, Oliveira P, Reis R. 95 Associations between functional EGFR polymorphisms and glioma risk. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70903-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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27
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Peres RL, Maciel EL, Morais CG, Ribeiro FCK, Vinhas SA, Pinheiro C, Dietze R, Johnson JL, Eisenach K, Palaci M. Comparison of two concentrations of NALC-NaOH for decontamination of sputum for mycobacterial culture. Int J Tuberc Lung Dis 2009; 13:1572-1575. [PMID: 19919781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
This study compared the effect of using two different concentrations of sodium hydroxide (NaOH) in the N-acetyl-L-cysteine-sodium hydroxide (NALC-NaOH) method for sputum decontamination on smear and culture positivity and the proportion of contaminated cultures: 14% of cultures were contaminated using the standard final 1% NaOH concentration during processing compared to 11% contaminated cultures using a final 1.25% NaOH concentration (P < 0.008). The proportion of cultures positive for mycobacteria decreased from 21% to 11% for sputum processed with 1% and 1.25% final NaOH concentrations, respectively (P < 0.001). Our findings suggest that a small reduction in culture contamination did not justify the considerable loss of positive cultures.
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Affiliation(s)
- R L Peres
- Núcleo de Doenças Infecciosas, Universidade Federal do Espírito Santo, Vitória, Espirito Santo, Brazil
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28
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Martinho O, Longatto-Filho A, Lambros MBK, Martins A, Pinheiro C, Silva A, Pardal F, Amorim J, Mackay A, Milanezi F, Tamber N, Fenwick K, Ashworth A, Reis-Filho JS, Lopes JM, Reis RM. Expression, mutation and copy number analysis of platelet-derived growth factor receptor A (PDGFRA) and its ligand PDGFA in gliomas. Br J Cancer 2009; 101:973-82. [PMID: 19707201 PMCID: PMC2743351 DOI: 10.1038/sj.bjc.6605225] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [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] [Revised: 05/21/2009] [Accepted: 07/08/2009] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Malignant gliomas are the most prevalent type of primary brain tumours but the therapeutic armamentarium for these tumours is limited. Platelet-derived growth factor (PDGF) signalling has been shown to be a key regulator of glioma development. Clinical trials evaluating the efficacy of anti-PDGFRA therapies on gliomas are ongoing. In this study, we intended to analyse the expression of PDGFA and its receptor PDGFRA, as well as the underlying genetic (mutations and amplification) mechanisms driving their expression in a large series of human gliomas. METHODS PDGFA and PDGFRA expression was evaluated by immunohistochemistry in a series of 160 gliomas of distinct World Health Organization (WHO) malignancy grade. PDGFRA-activating gene mutations (exons 12, 18 and 23) were assessed in a subset of 86 cases by PCR-single-strand conformational polymorphism (PCR-SSCP), followed by direct sequencing. PDGFRA gene amplification analysis was performed in 57 cases by quantitative real-time PCR (QPCR) and further validated in a subset of cases by chromogenic in situ hybridisation (CISH) and microarray-based comparative genomic hybridisation (aCGH). RESULTS PDGFA and PDGFRA expression was found in 81.2% (130 out of 160) and 29.6% (48 out of 160) of gliomas, respectively. Its expression was significantly correlated with histological type of the tumours; however, no significant association between the expression of the ligand and its receptor was observed. The absence of PDGFA expression was significantly associated with the age of patients and with poor prognosis. Although PDGFRA gene-activating mutations were not found, PDGFRA gene amplification was observed in 21.1% (12 out of 57) of gliomas. No association was found between the presence of PDGFRA gene amplification and expression, excepting for grade II diffuse astrocytomas. CONCLUSION The concurrent expression of PDGFA and PDGFRA in different subtypes of gliomas, reinforce the recognised significance of this signalling pathway in gliomas. PDGFRA gene amplification rather than gene mutation may be the underlying genetic mechanism driving PDGFRA overexpression in a portion of gliomas. Taken together, our results could provide in the future a molecular basis for PDGFRA-targeted therapies in gliomas.
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Affiliation(s)
- O Martinho
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, 4710 Braga, Portugal
| | - A Longatto-Filho
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, 4710 Braga, Portugal
- Instituto Adolfo Lutz, 355-01246-902 São Paulo, Brazil
| | - M B K Lambros
- The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London SW3 6JB, UK
| | - A Martins
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, 4710 Braga, Portugal
| | - C Pinheiro
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, 4710 Braga, Portugal
| | - A Silva
- Department of Pathology, S. Marcos Hospital, 4710 Braga, Portugal
| | - F Pardal
- Department of Pathology, S. Marcos Hospital, 4710 Braga, Portugal
| | - J Amorim
- Department of Oncology, S. Marcos Hospital, 4710 Braga, Portugal
| | - A Mackay
- The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London SW3 6JB, UK
| | - F Milanezi
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, 4710 Braga, Portugal
- IPATIMUP, 4200 Porto, Portugal
| | - N Tamber
- The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London SW3 6JB, UK
| | - K Fenwick
- The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London SW3 6JB, UK
| | - A Ashworth
- The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London SW3 6JB, UK
| | - J S Reis-Filho
- The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London SW3 6JB, UK
| | - J M Lopes
- IPATIMUP, 4200 Porto, Portugal
- Medical Faculties of Porto University, 4200 Porto, Portugal
| | - R M Reis
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, 4710 Braga, Portugal
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Ramos A, Matos C, Russo-Almeida P, Bettencourt C, Matos J, Martins A, Pinheiro C, Rangel-Figueiredo T. Candidate genes for milk production traits in Portuguese dairy sheep. Small Rumin Res 2009. [DOI: 10.1016/j.smallrumres.2009.02.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Chaves MM, Flexas J, Pinheiro C. Photosynthesis under drought and salt stress: regulation mechanisms from whole plant to cell. Ann Bot 2009; 103:551-60. [PMID: 18662937 PMCID: PMC2707345 DOI: 10.1093/aob/mcn125] [Citation(s) in RCA: 1380] [Impact Index Per Article: 92.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2008] [Revised: 05/06/2008] [Accepted: 06/12/2008] [Indexed: 05/18/2023]
Abstract
BACKGROUND Plants are often subjected to periods of soil and atmospheric water deficits during their life cycle as well as, in many areas of the globe, to high soil salinity. Understanding how plants respond to drought, salt and co-occurring stresses can play a major role in stabilizing crop performance under drought and saline conditions and in the protection of natural vegetation. Photosynthesis, together with cell growth, is among the primary processes to be affected by water or salt stress. SCOPE The effects of drought and salt stresses on photosynthesis are either direct (as the diffusion limitations through the stomata and the mesophyll and the alterations in photosynthetic metabolism) or secondary, such as the oxidative stress arising from the superimposition of multiple stresses. The carbon balance of a plant during a period of salt/water stress and recovery may depend as much on the velocity and degree of photosynthetic recovery, as it depends on the degree and velocity of photosynthesis decline during water depletion. Current knowledge about physiological limitations to photosynthetic recovery after different intensities of water and salt stress is still scarce. From the large amount of data available on transcript-profiling studies in plants subjected to drought and salt it is becoming apparent that plants perceive and respond to these stresses by quickly altering gene expression in parallel with physiological and biochemical alterations; this occurs even under mild to moderate stress conditions. From a recent comprehensive study that compared salt and drought stress it is apparent that both stresses led to down-regulation of some photosynthetic genes, with most of the changes being small (ratio threshold lower than 1) possibly reflecting the mild stress imposed. When compared with drought, salt stress affected more genes and more intensely, possibly reflecting the combined effects of dehydration and osmotic stress in salt-stressed plants.
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Affiliation(s)
- M M Chaves
- Instituto Superior de Agronomia, Technical University of Lisbon, Lisbon, Portugal.
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Pinheiro C, Longatto-Filho A, Pereira S, Etlinger D, Moreira M, Jubé L, Schmitt F, Baltazar F. 378 POSTER CD147 expression correlates with monocarboxylate transporters 1 and 4 in cervical carcinoma. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)72312-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Ribeiro A, Kessler A, Viola T, Silva I, Rubin L, Raber M, Pinheiro C, Lecznieski L. Nutritional Interaction of Methionine Sources and Sodium and Potassium Levels on Broiler Performance Under Brazilian Summer Conditions. J APPL POULTRY RES 2008. [DOI: 10.3382/japr.2007-00024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Sales J, David C, Souza P, Knibel M, Hatum R, Moraes G, Dias F, Pinheiro C, Lima S, Japiassú A, Rea A, Lobo S. Crit Care 2006; 10:P111. [DOI: 10.1186/cc4458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Reis-Filho JS, Pinheiro C, Lambros MBK, Milanezi F, Carvalho S, Savage K, Simpson PT, Jones C, Swift S, Mackay A, Reis RM, Hornick JL, Pereira EM, Baltazar F, Fletcher CDM, Ashworth A, Lakhani SR, Schmitt FC. EGFR amplification and lack of activating mutations in metaplastic breast carcinomas. J Pathol 2006; 209:445-53. [PMID: 16739104 DOI: 10.1002/path.2004] [Citation(s) in RCA: 204] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Metaplastic breast carcinomas are reported to harbour epidermal growth factor receptor (EGFR) overexpression in up to 80% of the cases, but EGFR gene amplification is the underlying genetic mechanism in around one-third of these. In this study, EGFR gene amplification as defined by chromogenic in situ hybridization and protein overexpression was examined in a cohort of 47 metaplastic breast carcinomas. Furthermore, the presence of activating EGFR mutations in exons 18, 19, 20, and 21 was investigated. Thirty-two cases showed EGFR overexpression and of these, 11 (34%) harboured EGFR gene amplification. In addition, EGFR amplification showed a statistically significant association with EGFR overexpression (p < 0.0094) and was restricted to carcinomas with homologous metaplasia. Ten cases, five with and five without EGFR amplification, were subjected to microarray-based CGH, which demonstrated that EGFR copy number gain may occur by amplification of a discrete genomic region or by gains of the short arm of chromosome 7 with a breakpoint near the EGFR gene locus, the minimal region of amplification mapping to EGFR, LANCL2, and SEC61G. No activating EGFR mutations were identified, suggesting that this is unlikely to be a common alternative underlying genetic mechanism for EGFR expression in metaplastic breast carcinomas. Given that metaplastic breast carcinomas are resistant to conventional chemotherapy or hormone therapy regimens and that tumours with EGFR amplification are reported to be sensitive to EGFR tyrosine kinase inhibitors, these findings indicate that further studies are warranted to explore EGFR tyrosine kinase inhibitors as potential therapeutic agents for metaplastic breast carcinomas harbouring amplification of 7p11.2.
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Affiliation(s)
- J S Reis-Filho
- The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London, UK.
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Pinheiro C, Kehr J, Ricardo CP. Effect of water stress on lupin stem protein analysed by two-dimensional gel electrophoresis. Planta 2005; 221:716-28. [PMID: 15668768 DOI: 10.1007/s00425-004-1478-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2004] [Accepted: 11/18/2004] [Indexed: 05/18/2023]
Abstract
Lupinus albus plants can withstand severe drought stress and show signs of recovery 24 h after rewatering (RW). Two-dimensional gel electrophoresis was used to evaluate the effect of water deficit (WD) on the protein composition of the two components of the lupin stem (stele and cortex). This was performed at three distinct stress levels: an early stage, a severe WD, and early recovery. Protein characterisation was performed through mass spectrometric partial sequencing. Modifications in the protein expression were first noticed at 3 days of withholding water, when the plant water status was still unaffected but some decrease in the relative soil water content had already occurred. An increase in serine proteases, possibly associated with WD sensing, was an early alteration induced by WD. When the stress severity increased, a larger number of stem proteins were affected. Immunophilin, serine protease and cysteine protease (well-known components of animal sensing pathways) were some of these proteins. The simultaneous expression of proteases and protease inhibitors that reacted differently to the stress level and to RW was found. Although the level of protease inhibitors was significantly raised, RW did not cause de novo expression of proteins. Many amino acid sequences did not match known sequences of either protein or expressed sequence tag databases. This emphasises the largely unknown nature of stem proteins. Nevertheless, some important clues regarding the way the lupin plant copes with WD were revealed.
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Affiliation(s)
- C Pinheiro
- Instituto de Tecnologia Química e Biológica, Apartado127, 2781901 Oeiras, Portugal
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Sales J, David C, Souza P, Knibel M, Hatum R, Dias F, Neto A, Pinheiro C, Lima S, Japiassú A, Lobo S, Estrada A, Anjos J. Crit Care 2005; 9:P197. [DOI: 10.1186/cc3260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Chaves MM, Pereira JS, Maroco J, Rodrigues ML, Ricardo CPP, Osório ML, Carvalho I, Faria T, Pinheiro C. How plants cope with water stress in the field. Photosynthesis and growth. Ann Bot 2002; 89 Spec No:907-16. [PMID: 12102516 PMCID: PMC4233809 DOI: 10.1093/aob/mcf105] [Citation(s) in RCA: 563] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Plants are often subjected to periods of soil and atmospheric water deficit during their life cycle. The frequency of such phenomena is likely to increase in the future even outside today's arid/semi-arid regions. Plant responses to water scarcity are complex, involving deleterious and/or adaptive changes, and under field conditions these responses can be synergistically or antagonistically modified by the superimposition of other stresses. This complexity is illustrated using examples of woody and herbaceous species mostly from Mediterranean-type ecosystems, with strategies ranging from drought-avoidance, as in winter/spring annuals or in deep-rooted perennials, to the stress resistance of sclerophylls. Differences among species that can be traced to different capacities for water acquisition, rather than to differences in metabolism at a given water status, are described. Changes in the root : shoot ratio or the temporary accumulation of reserves in the stem are accompanied by alterations in nitrogen and carbon metabolism, the fine regulation of which is still largely unknown. At the leaf level, the dissipation of excitation energy through processes other than photosynthetic C-metabolism is an important defence mechanism under conditions of water stress and is accompanied by down-regulation of photochemistry and, in the longer term, of carbon metabolism.
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Affiliation(s)
- M M Chaves
- Instituto Superior de Agronomia, Universidade Técnica Lisboa, Tapada da Ajuda, Portugal.
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Pinheiro C, Chaves MM, Ricardo CP. Alterations in carbon and nitrogen metabolism induced by water deficit in the stems and leaves of Lupinus albus L. J Exp Bot 2001; 52:1063-70. [PMID: 11432922 DOI: 10.1093/jexbot/52.358.1063] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Water deficit (WD) in Lupinus albus L. brings about tissue-specific responses that are dependent on stress intensity. Carbohydrate metabolism is very sensitive to changes in plant water status. Six days from withholding water (DAW), sucrose, glucose and fructose levels of the leaf blade had already increased over 5-fold, and the activities of SS and INV(A) had increased c. 1.5-2 times. From 9 DAW on, when stress intensity was more pronounced, these effects were reversed with fructose and glucose concentrations as well as INV(A) activity dropping in parallel. The stem (specifically the stele) responded to the stress intensification with striking increases in the concentration of sugars, N and S, and in the induction of thaumatin-like-protein and an increase in chitinase and peroxidase. At 13 DAW, the plants lost most of the leaves but on rewatering they fully recovered. Thus, the observed changes appear to contribute to a general mechanism of survival under drought, the stem playing a key role in that process.
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Affiliation(s)
- C Pinheiro
- Plant Biochemistry, Instituto de Tecnologia Química e Biológica, Apartado 127, 2781-901 Oeiras, Portugal
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Wolf G, Almeida JS, Pinheiro C, Correia V, Rodrigues C, Reis MA, Crespo JG. Two-dimensional fluorometry coupled with artificial neural networks: a novel method for on-line monitoring of complex biological processes. Biotechnol Bioeng 2001; 72:297-306. [PMID: 11135199 DOI: 10.1002/1097-0290(20010205)72:3<297::aid-bit6>3.0.co;2-b] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The use of two-dimensional scanning fluorometry as an on-line, noninvasive, in situ bioreactor monitoring technique is extended to complex bioprocesses using mixed cultures, with particular attention to biofilm systems. Using the example of spectra subtraction, it is demonstrated that established methods for fluorescence data analysis have a limited capability of utilizing overall fluorometric information. Artificial neural networks (ANNs) are introduced as a novel nonlinear and nonmechanistic technique for interpreting the highly complex fluorescence maps. It is shown that ANNs are able to infer process performance parameters in a pattern recognition approach, based on the entire fluorescence "fingerprint" of the biological system. The studies were carried out using an extractive membrane bioreactor (EMB) for the degradation of chlorinated organic compounds, operating with mixed cultures. Model pollutants em- ployed were 1,2-dichloroethane, 3-chloro-4-methylaniline, and p-toluidine.
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Affiliation(s)
- G Wolf
- Chemistry Department/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2825-114 Caparica, Portugal
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Regalado AP, Pinheiro C, Vidal S, Chaves I, Ricardo CP, Rodrigues-Pousada C. The Lupinus albus class-III chitinase gene, IF3, is constitutively expressed in vegetative organs and developing seeds. Planta 2000; 210:543-550. [PMID: 10787047 DOI: 10.1007/s004250050043] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A cDNA fragment encoding a Lupinus albus. L. class-III chitinase, IF3, was isolated, using a cDNA probe from Cucumis sativus L., by in-situ plaque hybridization from a cDNA library constructed in the Uni-ZAP XR vector, with mRNAs isolated from mature lupin leaves. The cDNA had a coding sequence of 293 amino acids including a 27-residue N-terminal signal peptide. A class-III chitinase gene was detected by Southern analysis in the L. albus genome. Western blotting experiments showed that the IF3 protein was constitutively present during seed development and in all the studied vegetative lupin organs (i.e., roots, hypocotyls and leaves) at two growth stages (7- and 20-d-old plants). Accumulation of both the IF3 mRNA and IF3 protein was triggered by salicylic acid treatment as well as by abiotic (UV-C light and wounding) and biotic stress conditions (Colletotrichum gloeosporioides infection). In necrotic leaves, IF3 chitinase mRNA was present at a higher level than that of another mRNA encoding a pathogenesis-related (PR) protein from L. albus (a PR-10) and that of the rRNAs. We suggest that one role of the IF3 chitinase could be in the defense of the plant against fungal infection, though our results do not exclude other functions for this protein.
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Affiliation(s)
- A P Regalado
- Instituto de Tecnologia Química e Biológica, Quinta do Marquês, Oeiras, Portugal
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Pinheiro C, Ribeiro I, Ramos L, Oliveira M. Adenomas hipofisarios secretores de hormona do crescimento. Uma análise clínica, endocrinológica, imagiológica, neuro-oftalmológica e cirúrgica de 32 casos operados. Neurocirugia (Astur) 1999. [DOI: 10.1016/s1130-1473(99)70970-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pinheiro C, Calheiros A, Martins V, Carvalho E. Meningiomas dos ventrículos laterais. Um estudo clínico, imagiológico e cirúrgico de 3 casos operados. Neurocirugia (Astur) 1997. [DOI: 10.1016/s1130-1473(97)70730-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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