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Tulli MJ, Manzano A, Abdala V. Is the Shape of Turtle Claws Driven by Locomotor Modes? Evol Biol 2022. [DOI: 10.1007/s11692-022-09580-2] [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]
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Mora C, Sampedro I, Rodríguez-Caballero A, Martín-Láez R, Ortega-Roldán M, Venkatraghavan L, Fernández-Miera M, Varea M, Pajaron-Guerrero M, Esteban J, Moreno B, Manzano A, Ruiz I, Martino J, Zadeh G, Bernstein M, Velásquez C. Barriers and facilitators in the implementation of a telemedicine-based outpatient brain tumor surgery program. Neurosurg Focus 2022; 52:E8. [DOI: 10.3171/2022.3.focus2242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/21/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE
Despite growing evidence on the benefits of outpatient oncological neurosurgery (OON), it is only performed in a few specialized centers and there are no previous descriptions of established OON programs in Europe. Moreover, increasing application of telemedicine strategies, especially after the start of the coronavirus disease 2019 (COVID-19) pandemic, is drastically changing neurosurgical management, particularly in the case of vulnerable populations such as neuro-oncological patients. In this context, the authors implemented an OON program in their hospital with telematic follow-up. Herein, they describe the protocol and qualitatively analyze the barriers and facilitators of the development process.
METHODS
An OON program was developed through the following steps: assessment of hospital needs, specific OON training, multidisciplinary team organization, and OON protocol design. In addition, the implementation phase included training sessions, a pilot study, and continuous improvement sessions. Finally, barriers and facilitators of the protocol’s implementation were identified from the feedback of all participants.
RESULTS
An OON protocol was successfully designed and implemented for resection or biopsy of supratentorial lesions up to 3 cm in diameter. The protocol included the patient’s admission to the day surgery unit, noninvasive anesthetic monitoring, same-day discharge, and admission to the hospital-at-home (HaH) unit for telematic and on-site postoperative care. After a pilot study including 10 procedures in 9 patients, the main barriers identified were healthcare provider resistance to change, lack of experience in outpatient neurosurgery, patient reluctance, and limitations in the recruitment of patients. Key facilitators of the process were the patient education program, the multidisciplinary team approach, and the HaH-based telematic postoperative care.
CONCLUSIONS
Initiating an OON program with telematic follow-up in a European clinical setting is feasible. Nevertheless, it poses several barriers that can be overcome by identifying and maximizing key facilitators of the process. Among them, patient education, a multidisciplinary team approach, and HaH-based postoperative care were crucial to the success of the program. Future studies should investigate the cost-effectiveness of telemedicine to assess potential cost savings, from reduced travel and wait times, and the impact on patient satisfaction.
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Affiliation(s)
- Carla Mora
- Department of Neurological Surgery, Hospital Universitario Marqués de Valdecilla
| | - Isabel Sampedro
- Hospital-at-Home Department, Hospital Universitario Marqués de Valdecilla
| | | | - Rubén Martín-Láez
- Department of Neurological Surgery, Hospital Universitario Marqués de Valdecilla
- Fundación Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Cantabria
| | - Marta Ortega-Roldán
- Ciencias Jurídicas y Empresariales, Universidad de Cantabria, Santander, Cantabria, Spain
- Medtronic Ibérica, Madrid, Spain
| | - Lashmi Venkatraghavan
- Department of Anesthesia and Pain Management, Toronto Western Hospital, University of Toronto
| | | | - Mar Varea
- Hospital-at-Home Department, Hospital Universitario Marqués de Valdecilla
| | | | - Jesus Esteban
- Department of Neurological Surgery, Hospital Universitario Marqués de Valdecilla
| | - Blanca Moreno
- Hospital-at-Home Department, Hospital Universitario Marqués de Valdecilla
| | - Asunción Manzano
- Hospital-at-Home Department, Hospital Universitario Marqués de Valdecilla
| | - Isabel Ruiz
- Department of Anesthesiology, Hospital Universitario Marqués de Valdecilla
| | - Juan Martino
- Department of Neurological Surgery, Hospital Universitario Marqués de Valdecilla
- Fundación Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Cantabria
| | - Gelareh Zadeh
- Division of Neurosurgery, Toronto Western Hospital, University of Toronto, Ontario, Canada
| | - Mark Bernstein
- Division of Neurosurgery, Toronto Western Hospital, University of Toronto, Ontario, Canada
| | - Carlos Velásquez
- Department of Neurological Surgery, Hospital Universitario Marqués de Valdecilla
- Fundación Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Cantabria
- Department of Anatomy and Cell Biology, Universidad de Cantabria, Santander, Cantabria; and
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Torres W, Morillo V, Manzano A, Suarez MK, Parra H, Lameda V, Nava M, D'Marco L, Puchades MJ, Medina O, Guerra-Torres XE, Bermúdez V. [Pathogenic mechanisms of SARS-CoV-2 infection and kidney disease: a clinical and molecular perspective]. An Sist Sanit Navar 2021; 44:445-456. [PMID: 34664556 DOI: 10.23938/assn.0973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The SARS-CoV-2 infection has become as a worldwide public health emergency. It exhibits a variety of clinical presentations, ranging from benign to acute respiratory distress syndrome, systemic involvement, and multiorganic failure. The severity of the clinical picture depends on host and virus biological features and the presence of comorbidities such as chronic kidney disease. In addition, the interaction between the virus, angiotensin-converting enzyme 2, and the exacerbated immune response could lead to the development of acute kidney injury. However, the implications of SARS-CoV-2 infection on renal cells, the prognosis of patients with chronic kidney disease, and the long-term behavior of renal function are not entirely understood. This review aims to explore the role of SARS-CoV-2 in acute and chronic kidney disease and the possible pathogenic mechanisms of renal involvement.
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Affiliation(s)
- W Torres
- Centro de Investigaciones Endocrino-Metabólicas "Dr. Félix Gómez". Escuela de Medicina. Universidad del Zulia. Maracaibo.
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Pacheco-Barcia V, Hernandez Sangil R, Fernández Montes A, Cruz Castellanos P, Castillo Trujillo A, Rogado J, Antoñanzas M, Gil Raga M, Manzano A, Asensio H, Lorente D, Obispo B, Ostios L, López de Ceballos M, Valero Arbizu M, García Carrasco M, Maria Cano J, Piera N, Carmona-Bayonas A, García T, Calderón C. P-168 Differences in coping strategies used by colorectal vs. non-colorectal cancer patients: Data from the Neoetic-SEOM study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.223] [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] Open
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Zeybek B, Manzano A, Bianchi A, Bonazzoli E, Bellone S, Buza N, Hui P, Lopez S, Perrone E, Manara P, Zammataro L, Altwerger G, Han C, Tymon-Rosario J, Menderes G, Ratner E, Silasi D, Huang G, Azodi M, Schwartz P, Santin A. Cervical carcinomas that overexpress human trophoblast cell-surface marker (Trop-2) are highly sensitive to the antibody-drug conjugate sacituzumab-govitecan. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.265] [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: 11/24/2022]
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Tymon-Rosario J, Manara P, Manzano A, Zammataro L, Bonazzoli E, Perrone E, Bellone S, Alexandrov L, Zeybek B, Han C, Altwerger G, Menderes G, Ratner E, Silasi D, Huang G, Azodi M, Schwartz P, Santin A. The PARP inhibitor niraparib demonstrates preclinical activity against HRD-deficient carcinosarcomas. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.438] [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: 10/23/2022]
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7
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Manzano A, Eskyté I, Ford HL, Pavitt SH, Potrata B, Schmierer K, Chataway J, Webb EJD, Meads D, Pepper G, Bekker HL. Patient perspective on decisions to switch disease-modifying treatments in relapsing-remitting multiple sclerosis. Mult Scler Relat Disord 2020; 46:102507. [PMID: 32979733 DOI: 10.1016/j.msard.2020.102507] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 06/08/2020] [Revised: 08/14/2020] [Accepted: 09/11/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND There are now large cohorts of people with relapsing-remitting multiple sclerosis (pwRRMS) who have taken several Disease-Modifying Treatments (DMTs). Studies about switching DMTs mostly focus on clinical outcomes rather than patients' decision-making. Neurologists are now required to support decisions at various times during the relapsing disease course and they do so with concerns about DMTs risks. This qualitative study investigates how pwRRMS weigh up the pros and cons of DMTs, focusing on perceptions of effectiveness and risks when new treatments are considered. OBJECTIVE To increase understanding of people's experiences of decision-making when switching DMTs. METHODS 30 semi-structured interviews were conducted with pwRRMS in England. 16 participants had switched DMT and their experiences were compared with those who had only taken one DMT. Interviews were analysed thematically to answer: what main factors influence people's decision-making to switch DMTs and why? RESULTS Of the 16 participants with experience of switching DMT, eight had taken two or more DMTs; eight had taken three or more. Two was the DMT median. This study demonstrated that despite the term "switching" implying that similar treatments are inter-changeable, for pwRRMS taking new treatments involves different emotions, routines, risks, prognosis and communication experiences. Two meta themes identified were: 1) A distinctive, rapid and emotional decision-making process where old emotions related to MS prognosis are revisited. 2) Switching has a different impact on communication for escalation or de-escalation processes. CONCLUSION Switching DMT involves different routines, risks, prognosis and communication experiences. These decisions are emotionally difficult because of the fear about transitioning to secondary progressive MS, and DMT effectiveness uncertainty. Patient centred decision aids should include information about first and consecutive treatment decisions.
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Affiliation(s)
- A Manzano
- School of Sociology & Social Policy, University of Leeds, Leeds, LS2 9JT, United Kingdom.
| | - I Eskyté
- Centre for Disability Studies, University of Leeds, Leeds, United Kingdom
| | - H L Ford
- Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - S H Pavitt
- School of Dentistry, University of Leeds, Leeds, United Kingdom
| | - B Potrata
- Independent Consultant, Rotterdam, the Netherlands
| | - K Schmierer
- Blizard Institute (Neuroscience), Barts and The London School of Medicine & Dentistry, Queen Mary University of London, London, United Kingdom
| | - J Chataway
- Queen Square Multiple Sclerosis Centre, Department of Neuroinflammation, UCL Institute of Neurology, University College London, London, United Kingdom
| | - E J D Webb
- Leeds Institute for Health Science, University of Leeds, Leeds, United Kingdom
| | - D Meads
- Leeds Institute for Health Science, University of Leeds, Leeds, United Kingdom
| | | | - H L Bekker
- Leeds Institute for Health Science, University of Leeds, Leeds, United Kingdom
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Fuentes Antras J, Viñuela M, Guevara-Hoyer K, de la Fuente E, Manzano A, Marquina Ospina G, PAZ M, Ocaña A, Fernández-Arquero M, Sánchez-Ramón S, Pérez-Segura P. 1767P Hypercoagulable state, CD4+ T-lymphocytopenia, dysregulated cytotoxicity and monocyte upregulation in COVID-19 positive cancer patients presenting with severe pneumonia. Ann Oncol 2020. [PMCID: PMC7506314 DOI: 10.1016/j.annonc.2020.08.1831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/30/2022] Open
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9
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Pérez-Peña J, Fekete J, Páez R, García-Sáenz J, García-Barberán V, Pérez-Segura P, Pandiella A, Gyorffy B, Ocaña A, Manzano A. A transcriptomic immunologic signature predicts favorable outcome in neoadjuvant chemotherapy treated triple negative breast tumours. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz253.072] [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: 11/15/2022] Open
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10
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Han C, Altwerger G, Menderes G, Bellone S, Bianchi A, Yadav G, Lopez S, Manzano A, Ratner E, Azodi M, Litkouhi B, Silasi D, Huang G, Schwartz P, Santin A. The combination of olaparib (Poly ADP-ribose polymerase inhibitor) with neratinib (pan-HER inhibitor) is synergistic in epithelial ovarian carcinoma overexpressing HER2. Gynecol Oncol 2019. [DOI: 10.1016/j.ygyno.2019.04.084] [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: 11/27/2022]
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11
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Sulava E, Bianchi W, Krepela A, Kachur R, Roszko P, Manzano A, Zarow G, Gaspary M, Natarajan R, Auten J. 7 Performance of Single Versus Double Site Intraosseous Blood Transfusion Strategies in a Swine [Sus Scrofa] Model of Hemorrhagic Shock. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Arévalo N, Méndez R, Manzano A. Chemotherapy-induced response of liver hemangiomas in a patient with a germ cell tumor: a case report. Radiologia (Engl Ed) 2018; 60:441-445. [PMID: 29433744 DOI: 10.1016/j.rx.2017.12.006] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 12/27/2017] [Accepted: 12/27/2017] [Indexed: 10/18/2022]
Abstract
Liver hemangiomas are the most common benign primary tumors of the liver. Due to their high prevalence, incidental finding of hemangiomas during radiological workup of oncologic patients is not uncommon. We present the case of a patient diagnosed of an ovarian immature teratoma and hepatic lesions with typical radiological appearance of hemangiomas that decreased in size during adjuvant chemotherapy with BEP regimen (cisplatin, etoposide and bleomycin). Chemotherapy-induced shrinkage of hepatic hemangiomas can mimic the response of liver metastases to chemotherapy and may induce erroneous interpretations. The purpose of this report is to describe a chemotherapy-induced response of liver hemangiomas, especially when BEP combination is used. To date this observation has been barely reported in the literature and, to our knowledge, this is the first documented case of chemotherapy-induced response of liver hemangiomas in a patient diagnosed of an ovarian immature teratoma.
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Affiliation(s)
- N Arévalo
- Servicio de Radiodiagnóstico, Hospital Universitario Clínico San Carlos, Madrid, España.
| | - R Méndez
- Servicio de Radiodiagnóstico, Hospital Universitario Clínico San Carlos, Madrid, España
| | - A Manzano
- Servicio de Oncología Médica, Hospital Universitario Clínico San Carlos, Madrid, España
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Zugazagoitia J, Biosca M, Grau J, Olivera J, Bei L, Olmedo M, Gómez Rueda A, Muñoz N, Ponce S, Domine M, Zenzola V, Nadal E, Ruffinelli J, Luna A, Hernández B, Martínez M, Font C, García-Morillo M, Gallego I, Sánchez Cabrero D, Miranda J, De Castro EM, Cacho J, Calvo V, Martínez J, Noguerón E, Mondéjar R, García Escobar I, Salvador-Coloma C, Juan Ó, Cánovas MS, Valdivia J, Ochoa M, Castro RL, Obispo B, Pangua C, Sereno M, Franco LF, Mielgo X, Calzas J, Blasco A, Aparisi F, Chara L, Lora D, Muñoz A, Paz-Ares L, Manzano A. MA 07.03 Incidence, Predictors and Prognostic Significance of Thromboembolic Events in Patients with Advanced Alk-Rearranged NSCLCs. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.505] [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: 10/18/2022]
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Carmona-Bayonas A, Jiménez-Fonseca P, Virizuela J, Antonio M, Font C, Biosca M, Ramchandani A, Martinez-Garcia J, Hernando J, Espinosa J, de Castro EM, Ghanem I, Beato C, Blasco A, Garrido M, Mondéjar R, Arcusa MÁ, Aragón I, Manzano A, Sevillano E, Castañón E, Ayala F. Performance of the clinical index of stable febrile neutropenia (CISNE) in different types of infections and tumors. Clin Transl Oncol 2016; 19:386-395. [PMID: 27525978 DOI: 10.1007/s12094-016-1540-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 06/07/2016] [Accepted: 08/02/2016] [Indexed: 11/28/2022]
Abstract
PURPOSE The clinical index of stable febrile neutropenia (CISNE) can contribute to patient safety without increasing the complexity of decision-making. However, febrile neutropenia (FN) is a diverse syndrome. The aim of this analysis is to assess the performance of CISNE according to the type of tumor and infection and to characterize these patients. METHODS We prospectively recruited 1383 FN episodes in situations of apparent clinical stability. Bonferroni-adjusted z tests of proportions were used to assess the association between the infections suspected at the time of onset and the type of tumor with the risk of serious complications and mortality. The performance of CISNE was appraised in each category using the Breslow-Day test for homogeneity of odds ratios and Forest Plots. RESULTS 171 patients had a serious complication (12.3 %, 95 % confidence interval 10.7-14.2 %). The most common initial assumptive diagnoses were: fever without focus (34.5 %), upper respiratory infection (14.9 %), enteritis (12.7 %), stomatitis (11.8 %), and acute bronchitis (10.7 %). Lung and breast were the most common tumors, accounting for approximately 56 % of the series. The distribution of complications, mortality, and bacteremia varies for each of these categories. However, Breslow-Day tests indicate homogeneity of the odds ratio of the dichotomized CISNE score to predict complications in all infection and tumor subtypes. CONCLUSION Despite FN's clinical and microbiological heterogeneity, the CISNE score was seen to be consistent and robust in spite of these variations. Hence, it appears to be a safe tool in seemingly stable FN.
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Affiliation(s)
- A Carmona-Bayonas
- Hematology and Medical Oncology Department, Hospital Universitario Morales Meseguer, Calle Marqués de los Vélez s/n, 30008, Murcia, Spain.
| | | | - J Virizuela
- Hospital Universitario Virgen Macarena, Sevilla, Spain
| | - M Antonio
- ICO Duran i Reynals, Barcelona, Spain
| | - C Font
- Hospital Universitario Clínic, Barcelona, Spain
| | - M Biosca
- Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - A Ramchandani
- Hospital Universitario Insular de Gran Canaria, Las Palmas, Spain
| | | | - J Hernando
- Hospital Universitario Miguel Servet, Zaragoza, Spain
| | - J Espinosa
- Hospital General Universitario de Ciudad Real, Ciudad Real, Spain
| | - E M de Castro
- Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - I Ghanem
- Hospital Universitario La Paz, Madrid, Spain
| | - C Beato
- Hospital Nisa Sevilla Aljarafe, Hospital Universitario Clínico San Carlos, Sevilla, Spain
| | - A Blasco
- Hospital General Universitario de Valencia, Valencia, Spain
| | - M Garrido
- Universidad Católica Pontificia de Chile, Santiago de Chile, Chile
| | - R Mondéjar
- Hospital Universitario de la Princesa, Madrid, Spain
| | - M Á Arcusa
- Consorci Sanitari de Terrassa, Barcelona, Spain
| | - I Aragón
- Hospital Juan Ramón Jiménez, Huelva, Spain
| | - A Manzano
- Hospital Clínico Universitario San Carlos, Madrid, Spain
| | - E Sevillano
- Hospital Universitario Son Espases, Palma de Mallorca, Spain
| | - E Castañón
- Clínica Universidad de Navarra, Pamplona, Spain
| | - F Ayala
- Hospital Universitario Morales Messeguer, Murcia, Spain
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Fonseca P, Carmona-Bayonas A, Font C, Antonio Rebollo M, Ramchandani A, Hernando Cubero J, Espinosa J, De Castro E, Ghanem I, Martínez J, Beato C, Virizuela J, Blasco A, Bonilla Y, Manzano A, Castañon E, Sevillano E, Vicente Conesa M, De La Peña F. Prognostic Evaluation of Clinically Stable Febrile Neutropenia: Prospective Data from 921 Patients from the Finite Study. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu356.7] [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: 11/13/2022] Open
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16
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Carhuapoma HC, Aguado C, Vazquez G, Camarero SC, Lezama MS, Moreno MI, Manzano A, Acosta D, Díaz-Rubio E, Segura PP. Cetuximab and Concurrent Radiation (Ctx-Rt) for Squamous Cell Carcinoma of the Head and Neck (Scchn) in Elderly and Multi-Morbid Patients. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu340.22] [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: 11/12/2022] Open
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17
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Zugazagoitia J, Puente J, González-Larriba J, Manzano A, Sotelo M, Hernández S, Sanz J, Pérez P, Díaz-Rubio E. Erlotinib versus Pemetrexed for Pretreated Non-Squamous Non-Small Cell Lung Cancer Patients in Clinical Practice. Oncology 2013; 84:255-64. [DOI: 10.1159/000346534] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 12/11/2012] [Indexed: 11/19/2022]
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Zugazagoitia J, Puente J, Hernandez S, Gonzalez-Larriba J, Sanz J, Manzano A, Diaz-Rubio E. Erlotinib (ERL) versus Pemetrexed (MTA) as Second-Line Treatment for Non-Squamous Non-Small Cell Lung Cancer (NSNSCLC): Efficacy and Safety Data. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33804-7] [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: 10/25/2022] Open
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Manzano A, Pérez-Segura P. Colorectal cancer chemoprevention: is this the future of colorectal cancer prevention? ScientificWorldJournal 2012; 2012:327341. [PMID: 22649288 PMCID: PMC3353298 DOI: 10.1100/2012/327341] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [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: 10/25/2011] [Accepted: 11/17/2011] [Indexed: 12/21/2022] Open
Abstract
Colorectal cancer (CRC) is presently one of the most common causes of cancer-related death in our setting and affects a great number of people each year. Screening strategies are commonly used but they do not seem enough to avoid CRC development or prevent completely its mortality. Because of this fact other prevention strategies have gained interest in recent years. Chemoprevention seems to be an attractive option in this setting and several drugs have been studied in this field. This review is focused on salicylates, nonsteroidal anti-inflammatory drugs (NSAIDs) and cycloxygenase-2 inhibitors (COXIBs), whose mechanism of action could be directly related to colon cancer chemoprevention.
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Affiliation(s)
- A Manzano
- Oncology Department, Hospital Clínico San Carlos, 28040 Madrid, Spain
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Corral E, Maynar J, Saralegui I, Manzano A. Donantes a corazón parado tipo III de Maastricht: una opción real. Med Intensiva 2011; 35:59-60. [DOI: 10.1016/j.medin.2010.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Revised: 09/27/2010] [Accepted: 09/29/2010] [Indexed: 10/18/2022]
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Gómez M, Navarro-Sabaté A, Manzano A, Duran J, Obach M, Bartrons R. Switches in 6-phosphofructo-2-kinase isoenzyme expression during rat sperm maturation. Biochem Biophys Res Commun 2009; 387:330-5. [DOI: 10.1016/j.bbrc.2009.07.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Accepted: 07/03/2009] [Indexed: 01/02/2023]
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22
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González Díaz P, Sanz Hernández M, Manzano A, Jiménez R. Anemia hemolítica y abuso alcohólico: ¿pensamos en el síndrome de Zieve? Rev Clin Esp 2009; 209:56-7. [DOI: 10.1016/s0014-2565(09)70363-7] [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: 11/17/2022]
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Calvo MN, Bartrons R, Castaño E, Perales JC, Navarro-Sabaté A, Manzano A. PFKFB3 gene silencing decreases glycolysis, induces cell-cycle delay and inhibits anchorage-independent growth in HeLa cells. FEBS Lett 2006; 580:3308-14. [PMID: 16698023 DOI: 10.1016/j.febslet.2006.04.093] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 04/27/2006] [Accepted: 04/28/2006] [Indexed: 11/30/2022]
Abstract
The high rate of glycolysis despite the presence of oxygen in tumor cells (Warburg effect) suggests an important role for this process in cell division. The glycolytic rate is dependent on the cellular concentration of fructose 2,6-bisphosphate (Fru-2,6-P2), which, in turn, is controlled by the bifunctional enzyme 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK-2). The ubiquitous PFK-2 isoenzyme (uPFK-2, alternatively named UBI2K5 or ACG) coded by the pfkfb3 gene is induced by different stimuli (serum, progesterone, insulin, hypoxia, etc.) and has the highest kinase/phosphatase activity ratio amongst all PFK-2 isoenzymes discovered to date, which is consistent with its role as a powerful activator of glycolysis. uPFK-2 is expressed in brain, placenta, transformed cells and proliferating cells. In the present work, we analyze the impact of small interfering RNA (siRNA)-induced silencing of uPFK-2 on the inhibition of cell proliferation. HeLa cells treated with uPFK-2 siRNA showed a decrease in uPFK-2 RNA levels measured at 24h. uPFK-2 protein levels were severely depleted at 48-72h when compared with cells treated with an unrelated siRNA, correlating with decreased glycolytic activity, Fru-2,6-P2, lactate and ATP concentrations. These metabolic changes led to reduced viability, cell-cycle delay and an increase in the population of apoptotic cells. Moreover, uPFK-2 suppression inhibited anchorage-independent growth. The results obtained highlight the importance of uPFK-2 on the regulation of glycolysis, on cell viability and proliferation and also on anchorage-independent growth. These data underscore the potential for uPFK-2 as an effective tumor therapeutic target.
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Affiliation(s)
- M N Calvo
- Unitat de Bioquímica, Departament de Ciències Fisiològiques II, Campus de Ciències de la Salut, IDIBELL-Universitat de Barcelona, Feixa Llarga s/n E-08907 L'Hospitalet, Barcelona, Spain
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Graham IR, Manzano A, Tagalakis AD, Mohri Z, Sperber G, Hill V, Beattie S, Schepelmann S, Dickson G, Owen JS. Gene repair validation. Nat Biotechnol 2001; 19:507-8. [PMID: 11385435 DOI: 10.1038/89209] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Navarro-Sabaté A, Manzano A, Riera L, Rosa JL, Ventura F, Bartrons R. The human ubiquitous 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase gene (PFKFB3): promoter characterization and genomic structure. Gene 2001; 264:131-8. [PMID: 11245987 DOI: 10.1016/s0378-1119(00)00591-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [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: 10/18/2022]
Abstract
A DNA fragment containing 1.5 kb of the 5'-flanking region of the human ubiquitous PFKFB3 gene, coding for 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase, was cloned and its promoter activity was examined. The 5' flanking region contains a TATA box-like and GC-rich sequences, yielding several potential Specific protein (Sp-1) and activator protein (AP)-2 binding sites. Putative regulatory motifs for E-box, nuclear factor (NF)-1 and progesterone response element were also found by computer assisted analysis. Transient expression assays of truncated promoter-reporter constructs in HeLa cells showed that this gene is induced by phorbol esters (PDB) and cyclic-AMP-dependent protein kinase signal activation. Furthermore, the genomic organization of the PFKFB3 gene is reported. This gene spans more than 26 kb containing at least 16 exons that accounts for the two reported isoforms, inducible and ubiquitous, generated through alternative splicing of exon 15.
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Affiliation(s)
- A Navarro-Sabaté
- Unitat de Bioquímica. Departament de Ciències Fisiològiques II, Campus de Bellvitge, Universitat de, C/ Feixa Llarga s/n E-08907 L'Hospitalet, Barcelona, Spain
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Okar DA, Manzano A, Navarro-Sabatè A, Riera L, Bartrons R, Lange AJ. PFK-2/FBPase-2: maker and breaker of the essential biofactor fructose-2,6-bisphosphate. Trends Biochem Sci 2001; 26:30-5. [PMID: 11165514 DOI: 10.1016/s0968-0004(00)01699-6] [Citation(s) in RCA: 245] [Impact Index Per Article: 10.7] [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: 10/17/2022]
Abstract
Fructose-2,6-bisphosphate is responsible for mediating glucagon-stimulated gluconeogenesis in the liver. This discovery has led to the realization that this compound plays a significant role in directing carbohydrate fluxes in all eukaryotes. Biophysical studies of the enzyme that both synthesizes and degrades this biofactor have yielded insight into its molecular enzymology. Moreover, the metabolic role of fructose-2,6-bisphosphate has great potential in the treatment of diabetes.
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Affiliation(s)
- D A Okar
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
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Perez JX, Roig T, Manzano A, Dalmau M, Boada J, Ventura F, Rosa JL, Bermudez J, Bartrons R. Overexpression of fructose 2,6-bisphosphatase decreases glycolysis and delays cell cycle progression. Am J Physiol Cell Physiol 2000; 279:C1359-65. [PMID: 11029283 DOI: 10.1152/ajpcell.2000.279.5.c1359] [Citation(s) in RCA: 26] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The ability to overexpress 6-phosphofructo-2-kinase/fructose 2, 6-bisphosphatase (PFK-2)/(FBPase-2) or a truncated form of the enzyme with only the bisphosphatase domain allowed us to analyze the relative role of the kinase and the bisphosphatase activities in regulating fructose 2,6-bisphosphate (Fru-2,6-P(2)) concentration and to elucidate their differential metabolic impact in epithelial Mv1Lu cells. The effect of overexpressing PFK-2/FBPase-2 resulted in a small increase in the kinase activity and in the activity ratio of the bifunctional enzyme, increasing Fru-2,6-P(2) levels, but these changes had no major effects on cell metabolism. In contrast, expression of the bisphosphatase domain increased the bisphosphatase activity, producing a significant decrease in Fru-2,6-P(2) concentration. The fall in the bisphosphorylated metabolite correlated with a decrease in lactate production and ATP concentration, as well as a delay in cell cycle. These results provide support for Fru-2,6-P(2) as a regulator of glycolytic flux and point out the role of glycolysis in cell cycle progression.
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Affiliation(s)
- J X Perez
- Unitat de Bioquímica, Departament de Ciències Fisiològiques II, Campus de Bellvitge, Universitat de Barcelona, Barcelona, Spain
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Manzano A, Rosa JL, Ventura F, Pérez JX, Nadal M, Estivill X, Ambrosio S, Gil J, Bartrons R. Molecular cloning, expression, and chromosomal localization of a ubiquitously expressed human 6-phosphofructo-2-kinase/ fructose-2, 6-bisphosphatase gene (PFKFB3). Cytogenet Cell Genet 2000; 83:214-7. [PMID: 10072580 DOI: 10.1159/000015181] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We report the identification of a human 6-phosphofructo-2-kinase/fructose 2,6-bisphosphatase gene (PFKFB3) isolated from a human fetal brain cDNA library. The gene was localized to 10p15-->p14 by fluorescence in situ hybridization. The entire cDNA (4,322 bp) codes for a polypeptide of 520 amino acid residues (molecular weight, 59.571 kDa). Structural analysis showed the presence of a kinase domain located at the amino terminus and a bisphosphatase domain at the carboxy terminus, characteristic of previously described 6-phosphofructo-2-kinase/fructose 2, 6-bisphosphatase isozymes. In addition, a phosphorylation site for cAMP-dependent protein kinase was found at the carboxy terminus. Northern blot analysis showed the presence of a unique 4.8-kb mRNA expressed in the different tissues studied. In mammalian COS-1 cells, this cDNA drives the expression of an active isozyme. Taken together, these results identify the presence of a gene coding for a human 6-phosphofructo-2-kinase/fructose 2,6-bisphosphatase isozyme which is ubiquitously expressed.
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Affiliation(s)
- A Manzano
- Unitat de Bioquímica, Campus de Bellvitge, Universitat de Barcelona, Barcelona, Spain
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Peralta C, Bartrons R, Riera L, Manzano A, Xaus C, Gelpí E, Roselló-Catafau J. Hepatic preconditioning preserves energy metabolism during sustained ischemia. Am J Physiol Gastrointest Liver Physiol 2000; 279:G163-71. [PMID: 10898759 DOI: 10.1152/ajpgi.2000.279.1.g163] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We evaluated the possibility that ischemic preconditioning could modify hepatic energy metabolism during ischemia. Accordingly, high-energy nucleotides and their degradation products, glycogen and glycolytic intermediates and regulatory metabolites, were compared between preconditioned and nonpreconditioned livers. Preconditioning preserved to a greater extent ATP, adenine nucleotide pool, and adenylate energy charge; the accumulation of adenine nucleosides and bases was much lower in preconditioned livers, thus reflecting slower adenine nucleotide degradation. These effects were associated with a decrease in glycogen depletion and reduced accumulation of hexose 6-phosphates and lactate. 6-Phosphofructo-2-kinase decreased in both groups, reducing the availability of fructose-2, 6-bisphosphate. Preconditioning sustained metabolite concentration at higher levels although this was not correlated with an increased glycolytic rate, suggesting that adenine nucleotides and cAMP may play the main role in the modulation of glycolytic pathway. Preconditioning attenuated the rise in cAMP and limited the accumulation of hexose 6-phosphates and lactate, probably by reducing glycogen depletion. Our results suggest the induction of metabolic arrest and/or associated metabolic downregulation as energetic cost-saving mechanisms that could be induced by preconditioning.
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Affiliation(s)
- C Peralta
- Unitat de Bioquímica, Campus de Bellvitge, Universitat de Barcelona, Spain
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Goren N, Manzano A, Riera L, Ambrosio S, Ventura F, Bartrons R. 6-Phosphofructo-2-kinase/fructose-2,6-bisphosphatase expression in rat brain during development. Brain Res Mol Brain Res 2000; 75:138-42. [PMID: 10648897 DOI: 10.1016/s0169-328x(99)00319-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This study reports the expression of the ubiquitous 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase gene (PFKFB3) (PFK-2/FBPase-2) in different stages of rat brain development. Northern blot and RT-PCR analysis demonstrated that ubiquitous PFK-2/FBPase-2 is expressed in rat brain from embryonic to adult life and shows a transient increase 1 day before birth, coincident with the maximum concentration of Fru-2,6-P(2) and PFK-2 activity. The levels of brain PFK-2/FBPase-2 gene expression as well as the enzymatic activity and the concentration of Fru-2,6-P(2) appear to be remarkably constant during adult life, without significant differences in the brain hippocampus, cortex, cerebellum or striatum areas.
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Affiliation(s)
- N Goren
- Cátedra de Farmacología, Facultad de Odontología, Universidad de Buenos Aires, CEFYBO-CONICET, Buenos Aires, Argentina
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Manzano A, Pérez JX, Nadal M, Estivill X, Lange A, Bartrons R. Cloning, expression and chromosomal localization of a human testis 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase gene. Gene 1999; 229:83-9. [PMID: 10095107 DOI: 10.1016/s0378-1119(99)00037-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [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: 11/21/2022]
Abstract
6-Phosphofructo-2-kinase/fructose 2,6-bisphosphatase (PFK-2/FBPase-2) is a bifunctional enzyme responsible for the synthesis and breakdown of Fru-2,6-P2, a key metabolite in the regulation of glycolysis. Several genes encode distinct PFK-2/FBPase-2 isozymes that differ in their tissue distribution and enzyme regulation. In this paper, we present the isolation of a cDNA from a human testis cDNA library that encodes a PFK-2/FBPase-2 isozyme. Sequencing data show an open reading frame of 1407 nucleotides that codifies for a protein of 469 amino acids. This has a calculated molecular weight of 54kDa and 97% similarity with rat testis PFK-2/FBPase-2, with complete conservation of the amino acid residues involved in the catalytic mechanism. Fluorescence in-situ hybridization (FISH) localized testis PFK-2/FBPase-2 gene (PFKFB4) in human chromosome 3 at bands p21-p22. A Northern blot analysis of different rat tissues showed the presence of a 2.4-kb mRNA expressed specifically in testis. In mammalian COS-1 cells, the human testis cDNA drives expression of an isozyme with a molecular weight of 55kDa. This isozyme shows clear PFK-2 activity. Taken together, these results provide evidence for a new PFK-2/FBPase-2 gene coding for a human testis isozyme.
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Affiliation(s)
- A Manzano
- Unitat de Bioquímica, Campus de Bellvitge, U.B.C/Feixa Llarga sn E-08907, L'Hospitalet, Spain
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Pérez JX, Manzano A, Tauler A, Bartrons R. Effect of starvation on gene expression of regulatory enzymes of glycolysis/gluconeogenesis in genetically obese (fa/fa) Zucker rats. Int J Obes (Lond) 1998; 22:667-72. [PMID: 9705027 DOI: 10.1038/sj.ijo.0800645] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To study the mechanism that controls fructose-2,6-bisphosphate (Fru-2,6-P2) accumulation, as well as the mRNAs levels of the glycolytic/gluconeogenic regulatory enzymes in the livers of fed and starved lean (fa/-) and obese (fa/fa) Zucker rats. DESIGN Rats were fed a standard chow or deprived of food for 24 h. SUBJECTS Male lean (fa/-) and genetically obese (fa/fa) rats (nine weeks old). MEASUREMENTS Fru-2,6-P2 concentration, 6-phosphofructo-2-kinase (PFK-2), glucokinase (GK), pyruvate kinase (PK) activities and the mRNA levels of GK, PFK-2, L-type pyruvate kinase, fructose-1,6-bisphosphatase (FBPase-1) and phosphoenolpyruvate carboxykinase (PEPCK) were analyzed. RESULTS PFK-2/FBPase-2 mRNA decreased during starvation in both fa/- and fa/fa animals. Although PFK-2/FBPase-2 mRNA levels were similar in fed lean and obese rats, PFK-2 concentration and activity were higher in fed obese than in fed lean animals, which might explain the high concentration of Fru-2,6-P2 observed in obese animals. During starvation, PFK-2 protein concentration decreased, correlating with the enzymatic activity and Fru-2,6-P2 levels. The activities of GK and L-pyruvate kinase (L-PK) also increased in fed obese (fa/fa) rats compared with fed lean (fa/-) animals, but decreased during starvation. The mRNA levels of glycolytic enzymes in fed obese rats were similar (PFK-2) or higher than (GK, L-PK) in fed lean animals. During starvation, they decreased in lean and obese rats with one important exception, GK mRNA remained high in obese animals. The mRNA of gluconeogenic enzymes remained constant (FBPase-1) or increased (PEPCK) during fasting. CONCLUSION The changes observed might be explained by the hyperinsulinaemia observed in the liver of obese rats, which might lead to the stimulation of glycolysis and lipogenesis.
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Affiliation(s)
- J X Pérez
- Departament de Ciències Fisiològiques Humanes i de la Nutrició, Campus de Bellvitge, Universitat de Barcelona, Spain
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Maynar J, Corral E, Manzano A, Fonseca F, Ulibarrena MA, Cantabrana S, Labayen F. Intrapericardial streptokinase fibrinolysis in the management of purulent pneumococcal pericarditis. Intensive Care Med 1997; 23:925-6. [PMID: 9310820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Escobedo F, González Gil L, Salarichs M, Manzano A, López I, Martín JA, Albaladejo C. [Evaluation of hospital emergency service attendance by patients from a basic health district]. Aten Primaria 1997; 19:169-75. [PMID: 9264636] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES To find the sociodemographic characteristics of patients registered at a Health Centre (HC) who attended a hospital Casualty Department, their reasons for attendance, features of their use of facilities and how justified their attendance was. DESIGN Descriptive study. SETTING Urban Health Centre, Llefià (Badalona), between February and June, 1995. PARTICIPANTS We used a questionnaire composed by the research team to survey 360 patients over 14 who attended the HC with a report from a Casualty Department. MEASUREMENTS AND RESULTS The variables recorded were: sociodemographic characteristics, reasons for attending Casualty, whether they attended on their own initiative, whether they knew about non-hospital Emergencies, the hospital, day and time, chronic pathology, diagnosis and destination on discharge from Casualty, length of stay and justification. 53.7% were women. 57.8% were married. 95% lived with a partner or intimate family member, 56.9% had completed primary education and 39.4% had jobs. 41% suffered a chronic pathology. Monday was the busiest day and physical trauma was the most frequent diagnosis on discharge. We considered 54.7% of all the consultations non-justified emergencies. CONCLUSIONS There is a high percentage of users who attend Casualty on their own initiative. Most of the emergencies are unjustified.
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Abstract
Measurements of heat dissipation, oxygen concentration and average vesicle size were correlated to study the effect of serum components on different types of liposome. The results indicate that the interaction between serum components and liposomes is exothermic and oxygen dependent, and leads to disruption of vesicles. The dependence of this effect on serum concentration, vesicle surface charge and type of liposome was also evaluated. Serum components did not produce any effect on conventional liposomes in the absence of oxygen. Moreover, in hypoxic conditions the serum-liposome interaction was delayed. Both results suggest that this interaction is an oxygen-dependent event. Finally, we confirmed that sterically stabilised liposomes remain unalterated in the presence of serum.
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Affiliation(s)
- M Foradada
- Unitat de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Spain
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Abstract
Taxol is a natural product, isolated from Taxus brevifolia, with increasing clinical applications because of its potent antitumor activity. Although it is mainly metabolized in the liver, its effect on hepatocyte metabolism has been scarcely investigated. In this study, the response of isolated rat hepatocytes to taxol was evaluated by correlating the changes observed in global indexes such as viability and heat dissipation with those produced in oxygen consumption and intracellular metabolites (ATP, fructose 2,6-bisphosphate, and lactate). The results indicate that taxol reduces aerobic metabolism, which induces an insufficient increase of the ATP via anaerobic glycolysis. Moreover, incubations of isolated mitochondria with taxol indicate that the respiratory chain is directly affected by this drug.
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Affiliation(s)
- A Manzano
- Unitat de Bioquímica, Unitat de Biofísica, Universitat de Barcelona, Spain
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Aubá J, Arasa H, Manzano A. [Difficulties in carrying out preventive activities in primary care]. Aten Primaria 1995; 16:428-32. [PMID: 7495952] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVE To find the difficulties perceived by Primary Care health professionals in integrating preventive activities into their daily practice. DESIGN A descriptive study using a survey. SETTING Barcelonès Nord and Maresme health region. PARTICIPANTS Health professionals from primary care teams. RESULTS The overall coverage of the survey was 47.7%. Pressure from patients or lack of time obtained the highest score (6.2), followed by the absence of a procedure or programme (4.5), absence of economic incentives (4.4) and the lack of material resources (4.2). The lowest scores corresponded to training (3.4) and motivation (2.9). CONCLUSIONS Primary Care occupies a strategic position for carrying out preventive activities and health promotion. But in practice health professionals encounter various obstacles. Lack of time and forgetting preventive activities are basic factors. The registration sheets or other specific devices to act as reminders, together with procedures or programmes involving the joint participation of all the team members, can help resolve these problems. There is a clear need to concentrate on those problems which the professionals directly involved are most concerned with.
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Affiliation(s)
- J Aubá
- Subdivisión de Atención Primaria Girona, Barcelonès Nord y Maresme, Institut Catalá de la Salut, Badalona
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Aubá J, Arasa H, Manzano A. [Preventive actions. A study in basic health areas]. Rev Enferm 1995; 18:13-6. [PMID: 7631102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Kernaghan SG, Manzano A. The complex face of charity. Hospitals 1975; 49:47-52. [PMID: 1150186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Kernaghan SG, Manzano A. The changing face of philanthropy. Trustee 1975; 28:17-9, 22. [PMID: 10308713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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