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Chacon C, Suarez M, Karakhanyan V, Desjardin K, Menneglier C, Soppera O, Moutarlier V, Grosjean T. Multipixel x ray detection integrated at the end of a narrow multicore fiber. Opt Lett 2023; 48:2178-2181. [PMID: 37058671 DOI: 10.1364/ol.484887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
We introduce and demonstrate the concept of a multipixel detector integrated at the tip of an individual multicore fiber. A pixel consists here of an aluminum-coated polymer microtip incorporating a scintillating powder. Upon irradiation, the luminescence released by the scintillators is efficiently transferred into the fiber cores owing to the specifically elongated metal-coated tips that ensure efficient luminescence matching to the fiber modes. With each pixel being selectively coupled to one of the cores of the multicore optical fiber, the resulting fiber-integrated x ray detection process is totally free from inter-pixel cross talk. Our approach holds promise for fiber-integrated probes and cameras for remote x and gamma ray analysis and imaging in hard-to-reach environments.
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Hameed N, Zeghdoudi T, Guichardaz B, Mezeghrane A, Suarez M, Courjal N, Bernal MP, Belkhir A, Baida FI. Stand-alone optical spinning tweezers with tunable rotation frequency. Opt Express 2023; 31:4379-4392. [PMID: 36785408 DOI: 10.1364/oe.480961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 01/08/2023] [Indexed: 06/18/2023]
Abstract
Advances in optical trapping design principles have led to tremendous progress in manipulating nanoparticles (NPs) with diverse functionalities in different environments using bulky systems. However, efficient control and manipulation of NPs in harsh environments require a careful design of contactless optical tweezers. Here, we propose a simple design of a fibered optical probe allowing the trapping of dielectric NP as well as a transfer of the angular momentum of light to the NP inducing its mechanical rotation. A polarization conversion from linearly-polarized incident guided to circularly transmitted beam is provoked geometrically by breaking the cylindrical symmetry of a coaxial nano-aperture that is engraved at the apex of a tapered metal coated optical fiber. Numerical simulations show that this simple geometry tip allows powerful light transmission together with efficient polarization conversion. This guarantees very stable trapping of quasi spherical NPs in a non-contact regime as well as potentially very tunable and reversible rotation frequencies in both directions (up to 45 Hz in water and 5.3 MHz in air for 10 mW injected power in the fiber). This type of fiber probe opens the way to a new generation of miniaturized tools for total manipulation (trapping, sorting, spinning) of NPs.
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Valdivia G, Alonso-Diez A, Suarez M, García P, Alonso-Miguel D, Affolter V, LaDouceur E, Perez-Alenza M, Peña L. First Description of Canine Benign Mammary Lymph Node Inclusions: A Diagnostic Challenge for Pathologists. J Comp Pathol 2022. [DOI: 10.1016/j.jcpa.2021.11.019] [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: 11/28/2022]
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Nobre P, Gaborit G, Sablong R, Courjal N, Behague F, Coste A, Suarez M, Duvillaret L, Beuf O. Optical link as an alternative for MRI receive coils: toward a passive approach. IEEE Trans Biomed Eng 2022; 70:1447-1453. [PMID: 36331631 DOI: 10.1109/tbme.2022.3217822] [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: 11/06/2022]
Abstract
OBJECTIVE The objective of this work was to propose an alternative solution to NMR signal transmission by replacing the coaxial cables of the receiver radiofrequency (RF) coil in the context of MRI so as to improve safety. Starting from the analysis of previous studies and reports on the topic, the difficulty of supplying power wirelessly to an RF coil was identified. To avoid this difficult task, the development of a passive analog optical link was studied. METHODS In order to quantify the requirements for achieving an analog conversion, the performance of the link was evaluated based on the input NMR signal amplitude and the optical power and compared with that of a galvanic link. Acquisitions were performed on a 7-T preclinical MRI system with a doped saline solution as phantom. A passive and MRI-compatible polarization-state custom-made modulator was tested as well as a commercial Mach-Zehnder interferometer. RESULTS The conversion was not sensitive enough to keep similar SNRs, but the main source of noise was identified along with parameters for improvement. Optical power emitted by the laser, insertion loss, and full-phase inversion voltage of the modulators were found to be crucial characteristics for the application. These data indicate that custom application devices are required since the frequency, bandwidth, and amplitude of NMR signals are quite different to usual telecommunication signals. CONCLUSION An electro-optic modulation and a transmission channel were successfully conceived and tested. Images were reconstructed with some significant SNR drawbacks that are expected to be compensated with an appropriate modulator. SIGNIFICANCE While technical challenges remain, our approach to a two-decades-long problem could solve a major issue of MRI safety by removing the need for supplying on-coil electrical current.
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Affiliation(s)
- Paul Nobre
- University of Lyon, INSA-Lyon, University Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS, UMR 5220, U1206, Villeurbanne, France
| | | | - Raphael Sablong
- University of Lyon, INSA-Lyon, University Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS, UMR 5220, U1206, Villeurbanne, France
| | - Nadege Courjal
- FEMTO-ST Institute, UMR CNRS 6174, Université Bourgogne Franche-Comté, France
| | - Florent Behague
- FEMTO-ST Institute, UMR CNRS 6174, Université Bourgogne Franche-Comté, France
| | - Antoine Coste
- FEMTO-ST Institute, UMR CNRS 6174, Université Bourgogne Franche-Comté, France
| | - Miguel Suarez
- FEMTO-ST Institute, UMR CNRS 6174, Université Bourgogne Franche-Comté, France
| | | | - Olivier Beuf
- University of Lyon, INSA-Lyon, University Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS, UMR 5220, U1206, Villeurbanne, France
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Feun LG, Wu C, Li YY, You M, Wangpaichitr M, Suarez M, Savaraj NG. Abstract 2336: Eradicating melanoma cells using combination of nutritional stress and checkpoint inhibitors. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-2336] [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: 11/16/2022]
Abstract
Abstract
Arginine (Arg) deprivation can inhibit tumors which do not express argininosuccinate synthetase (ASS), a key enzyme for synthesis of Arg. Arg deiminase (ADIPEG20) has shown antitumor activity in such tumors, including melanoma and mesothelioma. Resistance to this treatment occurs due to re-expression of ASS. We have shown that this is mediated via cMyc (positive regulator) and HIF1α ( negative regulator ). Arg starvation rapidly induces chromatin remodeling complex P300-HDAC2-Sin3A which epigenetically deacetylates H3K14ac and H3K27ac at the ASS promoter. Following the PHD2-derived HIF1α-degrading system, the promoter-bound HIF1α is degraded (Sci Rep 7:10814). This allows cMyc (an E-Box binder), to turn on ASS. Arg starvation rapidly triggers externalization of Gas6 to interact with its receptor tyrosine kinase (RTK) Axl. This activates the downstream Ras-PI3K/AKT/GSK3β pathway, resulting in stabilization of cMyc. However, this activation also turns on PDL1 gene expression. This is not surprising since cMyc has been shown to bind to PDL1 promoter and increase its expression. Thus, re-expression of ASS also leads to PDL1 expression. We studied these findings in two other cell lines, Mel114 and Skmel2, and obtained similar results, Interestingly, in three cell lines with high levels of antiapoptotic protein Bcl-2, Arg starvation only leads to growth inhibition, with only less than 2 fold increase in ASS and no PDL1 expression. These results suggest that increased Bcl-2 expression negates the necessity to increase PDL1 and ASS to prevent cell death from nutritional stress. In contrast, transfection of ASS in A2058, A375, Mel1220 and SkMel2 will only confer resistance to Arg starvation, and does not affect PDL1, Bcl2 expression or other alterations in PI3K/AKT pathway. Furthermore, in samples from patients who failed ADIPEG20 due to increased ASS expression, the primary cultures or re-biopsy tumor also exhibited high levels of PDL1 expression, which most likely will make them susceptible to anti PDL1 treatment. On the other hand, six primary cultures derived from patients who failed BRAF/MEK inhibitor (BMR) also showed low levels of ASS and increase in PDL1 expression (1.5-4 fold increase both in mRNA and proteins level compared to their parental cells). These results also applied to 5 pairs of BMR cell lines (A375/BMR, A2058/BMR, Skmel2/BMR, UACC62/BMR, MelRR/BMR). These cells also are very susceptible to combination of ADIPEG20 and PD-L1 treatment. Overall, our data suggest that combination of Arg deprivation and check point inhibitors is effective in patients whose tumors do not express ASS and as salvage therapy for BRAF/MEK inhibitor resistant patients. Supported by the VA Merit Review Award(1BX003328)
Citation Format: Lynn G. Feun, Chunjing Wu, Ying-Ying Li, Min You, Medhi Wangpaichitr, Miguel Suarez, Niramol G. Savaraj. Eradicating melanoma cells using combination of nutritional stress and checkpoint inhibitors [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 2336.
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Affiliation(s)
| | | | | | - Min You
- 1University of Miami, Miami, FL
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Chak E, Vu F, Dang J, Smith U, Stewart S, Tam K, Beste‐Fong A, Phelps B, Johnson I, Suarez M, Pat Pauly M, Chen MS. Enhancing Electronic Health Systems to End Transmission of Chronic Hepatitis B During COVID-19: A Collaborative Approach. Clin Liver Dis (Hoboken) 2021; 17:424-428. [PMID: 34386208 PMCID: PMC8340353 DOI: 10.1002/cld.1144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 04/07/2021] [Accepted: 05/25/2021] [Indexed: 02/04/2023] Open
Affiliation(s)
- Eric Chak
- Division of Gastroenterology and HepatologyUC Davis School of MedicineSacramentoCA
| | - Fresnia Vu
- Sacramento Community ClinicsHealth and Life Organization, Inc.SacramentoCA
| | - Julie Dang
- Department of Public Health SciencesUC Davis School of MedicineSacramentoCA
| | - Ulissa Smith
- Office of Community Outreach and EngagementUC Davis Comprehensive Cancer CenterSacramentoCA
| | - Susan Stewart
- Division of BiostatisticsUC Davis Department of Public Health SciencesSacramentoCA
| | - Karman Tam
- Sacramento County Department of Health ServicesDivision of Public HealthSacramentoCA
| | - Amy Beste‐Fong
- Sacramento County Department of Health ServicesDivision of Public HealthSacramentoCA
| | | | - Ian Johnson
- Sacramento Community ClinicsHealth and Life Organization, Inc.SacramentoCA
| | - Miguel Suarez
- Sacramento Community ClinicsHealth and Life Organization, Inc.SacramentoCA
| | | | - Moon S. Chen
- Division of Hematology and OncologyUC Davis School of MedicineSacramentoCA
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Reguilón Gallego L, Chen Liang T, Martín Santos T, Salar A, Fernández González M, Celades C, Tomás Navarro J, Martínez A, Andreu R, Balaguer Rosello A, Martín A, Baile M, López Jiménez J, Marquet J, Teruel A, Terol M, Benet C, Frutos L, Navarro J, Uña J, Suarez M, Cortes M, Contreras J, Ruiz C, Tamayo P, Mucientes J, Sopena Novales P, Sánchez Blanco J, Pérez Ceballos E, Jeréz Cayuela A, Ortuño F. THE ROLE OF FDG‐PET/CT AND BONE MARROW BIOPSY IN DETECTING BONE MARROW INVOLVEMENT IN THE INITIAL STAGING OF FOLLICULAR LYMPHOMA: AN ANALYSIS OF ACCURACY AND PROGNOSTIC IMPACT. Hematol Oncol 2021. [DOI: 10.1002/hon.34_2880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- L. Reguilón Gallego
- Hospital Morales Meseguer IMIB‐Arrixaca, Servicio de Hematología y Oncología Médica Murcia Spain
| | - T. Chen Liang
- Hospital Morales Meseguer IMIB‐Arrixaca, Servicio de Hematología y Oncología Médica Murcia Spain
| | - T. Martín Santos
- Hospital Universitario de Canarias Servicio de Hematología, La Laguna Tenerife Spain
| | - A. Salar
- Hospital del Mar Servicio de Hematología Barcelona Spain
| | - M. Fernández González
- Hospital Universitario de Canarias Servicio de Hematología, La Laguna Tenerife Spain
| | - C. Celades
- Josep Carreras Leukaemia Research Institute (IJC) Servicio de Hematología Badalona Spain
| | - J. Tomás Navarro
- ICO‐H. Germans Trias i Pujol Servicio de Hematología Badalona Spain
| | - A.‐B. Martínez
- Hospital Santa Lucía Servicio de Hematología Cartagena Spain
| | - R. Andreu
- Hospital La Fe Servicio de Hematología Valencia Spain
| | | | - A. Martín
- Hospital Clínico Universitario de Salamanca Servicio de Hematología Salamanca Spain
| | - M. Baile
- Hospital Clínico Universitario de Salamanca Servicio de Hematología Salamanca Spain
| | | | - J. Marquet
- Hospital Ramón y Cajal Servicio de Hematología Madrid Spain
| | - A.‐I. Teruel
- Hospital Clinico de Valencia Servicio de Hematología Valencia Spain
| | - M.‐J. Terol
- Hospital Clinico de Valencia Servicio de Hematología Valencia Spain
| | - C. Benet
- Hospital Arnau de Villanova Servicio de Hematología Valencia Spain
| | - L. Frutos
- Hospital Virgen de la Arrixaca Servicio de Medicina Nuclear Murcia Spain
| | - J.‐L. Navarro
- Hospital Virgen de la Arrixaca Servicio de Medicina Nuclear Murcia Spain
| | - J. Uña
- Hospital Universitario Nuestra Señora de la Candelaria Servicio de Medicina Nuclear Tenerife Spain
| | - M. Suarez
- Hospital del Mar Servicio de Medicina Nuclear Barcelona Spain
| | - M. Cortes
- Hospital Universitari de Bellvitge‐IDIBELL Servicio de Medicina Nuclear Barcelona Spain
| | - J. Contreras
- Hospital Santa Lucia Servicio de Medicina Nuclear Cartagena Spain
| | - C. Ruiz
- Hospital La Fe Servicio de Medicina Nuclear Valencia Spain
| | - P. Tamayo
- Hospital Clínico Universitario de Salamanca/IBSAL Servicio de Medicina Nuclear Salamanca Spain
| | - J. Mucientes
- Hospital Puerta de Hierro Servicio de Medicina Nuclear Madrid Spain
| | | | - J.‐J. Sánchez Blanco
- Hospital Morales Meseguer IMIB‐Arrixaca, Servicio de Hematología y Oncología Médica Murcia Spain
| | - E. Pérez Ceballos
- Hospital Morales Meseguer IMIB‐Arrixaca, Servicio de Hematología y Oncología Médica Murcia Spain
| | - A. Jeréz Cayuela
- Hospital Morales Meseguer IMIB‐Arrixaca, Servicio de Hematología y Oncología Médica Murcia Spain
| | - F. Ortuño
- Hospital Morales Meseguer IMIB‐Arrixaca, Servicio de Hematología y Oncología Médica Murcia Spain
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Duenas-Meza E, Escamilla M, Rincon L, Parra A, Bazurto-Zapata M, Restrepo S, Torres JL, Suarez M, Rojas A, Caparo E, Gonzalez-Garcia M. 566 Persistent Sleep Apnea and Desaturation in Preterm Children at 18 Months of Age at High Altitude (2640 M). Sleep 2021. [DOI: 10.1093/sleep/zsab072.564] [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: 11/12/2022] Open
Abstract
Abstract
Introduction
Children born at term who live at high altitude (HA) (≥ 2500 m) have different respiratory patterns from those that live at sea level. It is essential to determine these patterns in preterm children due to their high risk of Sleep Apnea-Hypopnea Syndrome (SAHS). The evolution of the apnea hypopnea index (AHI), desaturation index (ODI), and oxygen saturation (SpO2) is unknown in this group at HA. The objective was to characterize the respiratory patterns during sleep of preterm children living at HA and compare it with those of healthy children born at term.
Methods
We conducted a cross-sectional study in Bogotá, Colombia (altitude: 2640 m). We included 302 children, 127 were preterm with an average of gestational age of 31weeks (SD: 2.9) and an average weight at birth of 1600 g (SD: 594) and 175 healthy full-term infants. Three groups were defined according to age: Group I: 3–4 months, Group II: 6–7 months,, Group III: 10–18 months. All children underwent nocturnal polysomnogram to evaluate their respiratory variables: AHI, average and minimum SpO2, ODI, and T90 during sleep and analyzed the data according to the parameters of the American Academy of Sleep Medicine
Results
302 polysomnograms were performed, 54.3% were girls and were distributed by groups as follows: Group I:105 patients (34.8%), 16 preterm, Group II: 107 patients (35.4%), 46 preterm and Group III: 90 patients (29.8%), 65 preterm. We observed higher respiratory parameters within each age strata in premature infants compared to children born at term. Preterm infants had higher ODI, AHI, obstructive apnea hypopnea index (O-AHI), and Central Apnea hypopnea index (C-AHI). Although the effect decreases over time, we found a significant difference in the first age group. There was a high persistence index in children with a history of preterm birth living at high altitude. We also found a significant decrease in AHI, ODI across time in healthy and preterm children p<0.01
Conclusion
Premature children living at HA persist with higher ODI and AHI compared to children of similar ages born at term. The high desaturation index indicates the presence of intermittent hypoxia that persists in these children over time
Support (if any):
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Sánchez-Romero C, Pereira-Prado V, Sicco E, Suarez M, Tapia-Repetto G, Carreón-Burciaga R, Gónzalez-Gónzalez R, Villarroel-Dorrego M, Meleti M, Molina-Frechero N, Bologna-Molina R. Expression of caveolin-1 in tooth germ, ameloblastoma and ameloblastic carcinoma. Med Oral Patol Oral Cir Bucal 2021; 26:e238-e245. [PMID: 33037799 PMCID: PMC7980299 DOI: 10.4317/medoral.24151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/03/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The caveolin-1 protein (structural component of membrane caveolae) plays important roles in several biological functions, such as endocytosis, cell adhesion, and cell signaling. However, this protein has been associated with mechanisms of tumorigenesis in several neoplasms. The expression patterns and roles of caveolin-1 in the oral epithelium and in embryonic and odontogenic tumor tissues are still unclear. MATERIAL AND METHODS The expression of caveolin-1 was evaluated in samples of the normal gingival epithelium (n=7), human tooth germ (TG) (n=12), ameloblastoma (AM) (n=83), and ameloblastic carcinoma (AC) (n=9) by immunohistochemistry. Additionally, AM samples were analyzed by qRT-PCR and Western blot. RESULTS Most TG (91.7%), AM (73.5%) and AC (100%) samples showed diverse patterns of immunohistochemical positivity for caveolin-1, while only one gingival sample was positive. The transcript levels of cav-1 were significantly upregulated by 14.9-fold in AM tissue (P = 0.0014) compared to those in normal gingival epithelial tissue, as shown by qRT-PCR. Presence of caveolin-1 protein was confirmed by Western blot analysis. The caveolin-1 immunoexpression patterns throughout the stages of TG show its importance during odontogenesis. CONCLUSIONS The overexpression of caveolin-1 in AM and AC compared to its expression in normal gingival epithelium (adult tissue) suggests a possible role of caveolin-1 in protumoral events, but due to the similar immunoexpression observed in AM and AC, caveolin-1 may not necessarily participate in the malignant transformation process. However, future studies are needed to clarify and confirm these hypotheses.
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Affiliation(s)
- C Sánchez-Romero
- Molecular Pathology Area, Faculty of Dentistry University of the Republic, Uruguay
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McCarter S, Gehrking T, St. Louis E, Suarez M, Boeve B, Silber M, Low P, Singer W. 0787 Autonomic Dysfunction and Phenoconversion in Idiopathic/Isolated REM Sleep Behavior Disorder. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.783] [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: 11/12/2022] Open
Abstract
Abstract
Introduction
REM-sleep behavior disorder (RBD) is a common finding among patients with synucleinopathies. We aimed to determine the degree of autonomic dysfunction in patients presenting with idiopathic RBD (iRBD), and the predictive value of autonomic dysfunction for phenoconversion to a defined neurodegenerative disease.
Methods
We searched our electronic medical record for patients diagnosed with iRBD who also underwent standardized autonomic function testing within 6 months of iRBD diagnosis, and who had clinical follow-up of at least 3 years following iRBD diagnosis. Patients who received a diagnosis of phenoconversion within 3 months of autonomic testing were excluded. The composite autonomic severity score (CASS) was derived and compared between phenoconverters and non-converters using chi-square and Wilcoxon rank-sum tests.
Results
We identified 18 patients who fulfilled in- and exclusion criteria. Average age at autonomic testing was 67 ± 6.6 years. Twelve (67%) patients phenoconverted during the follow-up period; 6 developed PD, the other 6 DLB. Fifteen (83%) patients had at least mild autonomic dysfunction. There were no significant differences between overall converters and non-converters in total CASS or CASS subscores. However, iRBD patients who developed DLB had significantly higher total and cardiovagal CASS scores compared with those who developed PD (p <0.05), and a trend for higher adrenergic CASS scores compared to those who developed PD and those who did not phenoconvert (p=0.08 for each).
Conclusion
Autonomic dysfunction was seen in 83% of iRBD patients, and more severe baseline cardiovagal and adrenergic autonomic dysfunction in iRBD was associated with phenoconversion to DLB but not PD. Prospective studies are needed to confirm the value of autonomic testing for predicting phenoconversion and disease phenotype in iRBD.
Support
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Affiliation(s)
- S McCarter
- Department of Neurology, Mayo Clinic, Rochester, MN
| | - T Gehrking
- Department of Neurology, Mayo Clinic, Rochester, MN
| | - E St. Louis
- Department of Neurology and Sleep Medicine, Mayo Clinic, Rochester, MN
| | - M Suarez
- Department of Neurology, Mayo Clinic, Rochester, MN
| | - B Boeve
- Department of Neurology and Sleep Medicine, Mayo Clinic, Rochester, MN
| | - M Silber
- Department of Neurology and Sleep Medicine, Mayo Clinic, Rochester, MN
| | - P Low
- Department of Neurology, Mayo Clinic, Rochester, MN
| | - W Singer
- Department of Neurology, Mayo Clinic, Rochester, MN
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Hoblos A, Suarez M, Guichardaz B, Courjal N, Bernal MP, Issam Baida F. Revealing photonic symmetry-protected modes by the finite-difference-time-domain method. Opt Lett 2020; 45:2103-2106. [PMID: 32236079 DOI: 10.1364/ol.386845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 03/06/2020] [Indexed: 06/11/2023]
Abstract
This Letter is devoted to pointing out a specific feature of the finite-difference-time-domain (FDTD) method through the study of nano-structures supporting geometrical symmetry-protected modes that cannot be excited at certain conditions of illumination. The spatial discretization performed in the FDTD algorithm naturally leads to breaking this symmetry and allows the excitation of these modes. The quality factors of the corresponding resonances are then directly linked to the degree of symmetry breaking, i.e., the spatial grid dimension, even though the convergence criteria of the FDTD are fulfilled. This finding shows that the FDTD must be handled with great care and, more importantly, that very huge quality-factor resonances can be achieved at the cost of nanometer-scale mastered fabrication processes.
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Giraldo-Cadavid LF, Perdomo-Sanchez K, Córdoba-Gravini JL, Escamilla MI, Suarez M, Gelvez N, Gozal D, Duenas-Meza E. Allergic Rhinitis and OSA in Children Residing at a High Altitude. Chest 2019; 157:384-393. [PMID: 31589842 DOI: 10.1016/j.chest.2019.09.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 09/06/2019] [Accepted: 09/09/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND OSA affects 2% to 4 % of the pediatric population; allergic rhinitis (AR) has been identified as a risk factor in sleep-disordered breathing, but no studies evaluating such an association have been conducted in high-altitude environments. The goal of this study was to assess whether the severity of AR is associated with the severity of OSA in children undergoing polysomnography (PSG) in the high-altitude city of Bogotá, Colombia. METHODS A cross-sectional observational study of children with AR was conducted. Severity of AR was evaluated by using the AR health-related quality of life questionnaire for children (ESPRINT-15) and the Allergic Rhinitis and its Impact on Asthma (ARIA) classification. Diagnosis and severity of OSA were established by using PSG. Potential associations between AR severity and OSA severity were assessed by using binary logistic regression and the Spearman correlation coefficient (ρ). RESULTS A total of 99 children (mean age, 7.9 years; 45% female) were included; 53% had OSA. An ESPRINT-15 score was associated with severe OSA (OR, 2.0; 95% CI, 1.12-6.04; P = .01). Patients with moderate/severe persistent rhinitis according to ARIA exhibited a 10.1-fold greater risk of severe OSA (OR, 10.15; 95% CI, 1.15-89.0). Furthermore, the apnea-hypopnea index was associated with the ESPRINT-15 score (ρ = 0.215; P = .03) and with the ARIA severity scale (P = .04; ρ = 0.203). CONCLUSIONS In symptomatic children with AR residing at a high altitude, increasing AR severity is associated with more severe OSA.
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Affiliation(s)
- Luis Fernando Giraldo-Cadavid
- Interventional Pulmonology, Fundacion Neumologica Colombiana, Epidemiology and Biostatistics Department, University of La Sabana, School of Medicine, Chía, Colombia
| | - Karen Perdomo-Sanchez
- Pediatrics, University of La Sabana, School of Medicine, Fundacion Neumologica Colombiana, Bogotá, Colombia
| | - Jorge Luis Córdoba-Gravini
- Pediatrics, University of La Sabana, School of Medicine, Fundacion Neumologica Colombiana, Bogotá, Colombia
| | - Maria Isabel Escamilla
- Pediatrics, University of La Sabana, School of Medicine, Fundacion Neumologica Colombiana, Bogotá, Colombia
| | - Miguel Suarez
- Pediatrics, University of La Sabana, School of Medicine, Fundacion Neumologica Colombiana, Bogotá, Colombia
| | - Natalia Gelvez
- Otorhinolaryngology and Sleep Medicine, Fundacion Neumologica Colombiana, Bogotá, Colombia
| | - David Gozal
- Division of Pediatric Pulmonology and Child Health Research Institute, Department of Child Health, University of Missouri School of Medicine, and Women's and Children's Hospital, University of Missouri Health System, Columbia, MO
| | - Elida Duenas-Meza
- Pediatrics, Pulmonary Medicine and Sleep Medicine, Fundacion Neumologica Colombiana, Bogotá, Colombia.
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Abstract
RATIONALE While checkpoint inhibitors have revolutionized the treatment of melanoma, it is not known whether switching from one monoclonal antibody drug to another one would be justified in the case of a treatment failure. Herein, we report a case illustrating a durable response to pembrolizumab after a failure with nivolumab. PATIENT CONCERNS A 76-year-old white male noticed an enlarging papular lesion on his neck. DIAGNOSIS Malignant melanoma. INTERVENTIONS The patient underwent surgery in December 2013 and was found to have a B-Rapidly Accelerated Fibrosarcoma (BRAF) V600E mutated melanoma. Treatment with BRAF and MAPK/Erk kinase (MEK) inhibitors along with radiation was initiated. After 1 year, the disease progressed, and the treatment was switched to the cytotoxic T-lymphocyte antigen 4 (CTLA-4) blocking antibody, ipilimumab. As the tumor did not respond, the treatment was changed to programmed cell death receptor-1 (PD-1) blockers: nivolumab followed by pembrolizumab. Since the initial diagnosis, the tumor response was monitored by computed tomography (CT) scans. Immunohistochemistry (IHC) was also used for the assessment of programmed death ligand 1 PD-L1) expression in the neck, lung, and spleen lesions. OUTCOMES The patient had an initial mixed response to nivolumab, but the disease ultimately progressed as evidenced by new metastases to the spleen, thus the treatment was switched to pembrolizumab. After 46 cycles of treatment, all sites of metastases disappeared, including a substantial shrinkage of the splenic metastasis. To gain understanding about the pharmacological differences between nivolumab and pembrolizumab, the PD-1-ligands interactions and conformational dynamics responsible for the PD-1/PD-L1 checkpoint blockade were investigated. The higher affinity of pembrolizumab might likely arise from a unique and large patch of interactions engaging the C'D loop of PD-1, thus forcing an important motion across the PD-1 immunoreceptor. LESSONS In this case report, we described the tolerance and response of a melanoma patient to a sequence of various agents, including ipilimumab, nivolumab, and pembrolizumab. To the best of our knowledge, this is the first clinical report highlighting differences between PD-1 blockers, as shown by the unexpected and durable response of the tumor to pembrolizumab, after a treatment failure with nivolumab.
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Affiliation(s)
- Tanja Lepir
- Department of Veteran Affairs, Bruce W. Carter VA Medical Center, Miami, FL
| | - Mehdi Zaghouani
- Florida Atlantic University, Department of Chemistry and Biochemistry, Boca Raton, FL
| | - Stéphane P. Roche
- Florida Atlantic University, Department of Chemistry and Biochemistry, Boca Raton, FL
- Center for Molecular Biology and Biotechnology at Florida Atlantic University, Boca Raton, FL
| | - Ying-Ying Li
- Department of Veteran Affairs, Bruce W. Carter VA Medical Center, Miami, FL
| | - Miguel Suarez
- Department of Veteran Affairs, Bruce W. Carter VA Medical Center, Miami, FL
| | - Maria Jose Irias
- Department of Veteran Affairs, Bruce W. Carter VA Medical Center, Miami, FL
| | - Niramol Savaraj
- Department of Veteran Affairs, Bruce W. Carter VA Medical Center, Miami, FL
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Hart A, Bonner G, Suarez M, Roberson T, Burke L, Steffen A. FINDINGS FROM AN END-OF-LIFE EDUCATION INTERVENTION FOR AFRICAN AMERICAN CAREGIVERS OF RELATIVES WITH DEMENTIA. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Hart
- University of Illinois at Chicago
| | - G Bonner
- University of Illinois at Chicago
| | - M Suarez
- University of Illinois at Chicago
| | | | - L Burke
- University of Illinois at Chicago
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Rubio IT, Rodriguez R, Esgueva-Colmenarejo A, Suarez M, Espinosa-Bravo M, Siso C, Cordoba O, Alvarado S, Volders J, Van Den Tol P. Abstract P5-22-10: Intraoperative ultrasound guided surgery after neoadjuvant treatment in breast cancer improves patient´s quality of life. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p5-22-10] [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: 11/16/2022]
Abstract
Abstract
Background: Intraoperative ultrasound guided surgery (IOUS) has shown not only to improve surgical outcomes by achieving higher rates of negative margins and reducing the need for re-excisions, but also showing better cosmetic results and patient's satisfaction in the adjuvant setting. After neoadjuvant treatments (NAT) we have shown that IOUS lowers the volume of resection in patients with pathologic complete response or minimal microscopic disease after NAT without compromising margins and local recurrences when compared to wire localization techniques (WL) The aim of this study was to determine if IOUS after NAT contributes to improve cosmetic outcomes and quality of life (QOL) when compared with WL.
Material and Methods. The pilot study enrolled patients treated with NAT who underwent breast-conserving surgery (BCS) between July 2008 and December 2012. On the follow up visit, cosmetic outcomes were assessed by the patient and surgeon on a 4 point Likert scale, by the Breast Cancer Conservative Treatment cosmetic results (BCCT.core) software, and by an independent panel. QOL was assessed using cancer-specific (EORTC QLQ-C30 and EORTC QLQ-B23) questionnaires.
Results. The study investigated 113 patients: 81 (71.6 %) in the IOUS group and 32 (28.3 %) in the WL group. The patient and tumor characteristics were comparable between the two groups. Mean follow up was 64 months (range, 12-90) in the WL group while 41 months (range, 18-107) in the IOUS group.
Cosmetic outcomes reported by the patient showed a tendency (p=0.07) for better results in the IOUS group. Patient reported cosmetic outcomes and the independent panel cosmetic evaluation significantly correlated with lumpectomy volume excised (p= 0.04, p = 0.02 respectively). The BCCT.core did not correlate with volume of tissue excised (p < 0.14). IOUS achieved better cosmetic outcomes compared to WL, with excellent outcomes of 30% and 19% respectively, although poor cosmetic outcomes were 3% and 0% respectively. Correlation between patients and surgeons evaluation regarding cosmetic outcomes and satisfaction was low (0.38 and 0.40 respectively). A comparison of the QOL scores of 113 patients showed a significantly better global health status (p = 0.03), better emotional and role function (p = 0.004), for patients with IOUS compared to WL patients.
Conclusions. This is the first study to show that breast volume excised significantly correlates with cosmetic outcomes in the neoadjuvant setting. These results suggest that IOUS after NAT contributes to a better quality of life and may influence cosmetic outcomes in breast cancer patients. Patient reported outcomes should be included in the quality assessment in breast surgery as the correlation with surgeons' evaluation is low.
Citation Format: Rubio IT, Rodriguez R, Esgueva-Colmenarejo A, Suarez M, Espinosa-Bravo M, Siso C, Cordoba O, Alvarado S, Volders J, Van Den Tol P. Intraoperative ultrasound guided surgery after neoadjuvant treatment in breast cancer improves patient´s quality of life [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P5-22-10.
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Affiliation(s)
- IT Rubio
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - R Rodriguez
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - A Esgueva-Colmenarejo
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - M Suarez
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - M Espinosa-Bravo
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - C Siso
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - O Cordoba
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - S Alvarado
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - J Volders
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
| | - P Van Den Tol
- Hospital Univeristario VAll d¨Hebron, Barcelona, Spain; VU University Medical Center, Amsterdam, Netherlands
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16
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Banerjee U, Hagan K, Bhavsar S, Grasu R, Dang A, McCutcheon IE, Suarez M, Gottumukkala V, Cata JP. Association between intravenous acetaminophen and reduction in intraoperative opioid consumption during transsphenoidal surgery for pituitary tumors. J Anaesthesiol Clin Pharmacol 2018; 34:465-471. [PMID: 30787509 PMCID: PMC6360881 DOI: 10.4103/joacp.joacp_276_17] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background and Aims Pain during and after transsphenoidal surgeries originates from stimulation of branches of the trigeminal cranial nerve that supply the inner aspect of the nose cavity and dura mater. Thereby, patients undergoing transsphenoidal surgery may require moderate-to-large amounts of analgesics including opioids. Intravenous acetaminophen provides analgesia and reduces opioid consumption for a wide variety of surgeries. We hypothesized that the use of intravenous acetaminophen is associated with a reduction in intraoperative opioid consumption and provides significant analgesia during and after transsphenoidal surgery. Material and Methods This retrospective study included 413 patients who underwent transsphenoidal surgery for pituitary adenomas. The primary outcome of this study was intraoperative opioid consumption. Secondary outcomes included pain intensity, Richmond Agitation Sedation Scale scores, and nausea and vomiting upon arrival to postoperative anesthesia care unit. Patients were divided into two groups based on the intraoperative acetaminophen use. A prospensity score matching analysis was used to balance for important variables between the two groups of treatment. Regression models were fitted after matching the covariates. A P < 0.05 was considered statistically significant. Results After matching, 126 patients were included in each group of treatment. Patients in the acetaminophen group required significantly less amount (a decrease by 14.9%) of opioids during surgery than those in the non-acetaminophen group. Postoperative pain, postoperative nausea and vomiting, and sedation scores were not significantly different between patients who received intravenous acetaminophen and those who did not. Conclusion Intravenous acetaminophen is associated with a reduction in intraoperative opioids during transsphenoidal pituitary surgery.
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Affiliation(s)
- Upasana Banerjee
- Anesthesiology and Surgical Oncology Research Group, Houston, Texas, USA.,School of Biomedical Informatics, The University of Texas Health Science Center, Houston, Texas, USA
| | - Katherine Hagan
- Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Shreyas Bhavsar
- Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Roxana Grasu
- Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Anh Dang
- Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Ian E McCutcheon
- Anesthesiology and Surgical Oncology Research Group, Houston, Texas, USA.,Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Miguel Suarez
- Anesthesiology and Surgical Oncology Research Group, Houston, Texas, USA.,Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Vijaya Gottumukkala
- Anesthesiology and Surgical Oncology Research Group, Houston, Texas, USA.,Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Juan P Cata
- Anesthesiology and Surgical Oncology Research Group, Houston, Texas, USA.,Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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17
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Castro-Grattoni A, Torres M, Suarez M, Buvé RA, Girón C, Martinez A, Almendros I, Ramon F, Montserrat J, Dalmases M, Gozal D, Barbé F, Sánchez-de-la-Torre M. Impact of intermittent hypoxia on cardiovascular remodeling in a murine model of sleep apnea: effect of age. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.133] [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: 11/16/2022]
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18
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Li YY, Wu C, Shah SS, Chen SM, Wangpaichitr M, Kuo MT, Feun LG, Han X, Suarez M, Prince J, Savaraj N. Degradation of AMPK-α1 sensitizes BRAF inhibitor-resistant melanoma cells to arginine deprivation. Mol Oncol 2017; 11:1806-1825. [PMID: 29094484 PMCID: PMC5709618 DOI: 10.1002/1878-0261.12151] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 08/30/2017] [Revised: 10/04/2017] [Accepted: 10/19/2017] [Indexed: 12/14/2022] Open
Abstract
Melanomas harboring BRAF mutation (V600E) are known to recur frequently following treatment with BRAF inhibitors (BRAFi) despite a high initial response rate. Our previous study has uncovered that BRAFi‐resistant melanoma (BR) cells are vulnerable to arginine deprivation. It has been reported that naïve melanoma cells undergo autophagy and re‐express argininosuccinate synthetase 1 (ASS1) to enable them to synthesize arginine for survival when encountering arginine deprivation. Abolishing these two factors in BR cells confers sensitivity to arginine deprivation. In this report, we further demonstrated that downregulation of AMPK‐α1 in BR cells is a major factor contributing to impairment of autophagy as evidenced by decreased autophagosome formation. These BR cells also showed a metabolic shift from glucose to arginine dependence, which was supported by decreased expressions of GLUT1 (glucose transporter) and hexokinase II (HKII) coupled with less glucose uptake but high levels of arginine transporter CAT‐2 expression. Furthermore, silencing CAT‐2 expression also distinctly attenuated BR cell proliferation. Notably, when naïve melanoma cells became BR cells by long‐term exposure to BRAFi, a stepwise degradation of AMPK‐α1 was initiated via ubiquitin‐proteasome system (UPS). We discovered that a novel E3 ligase, RING finger 44 (RNF44), is responsible for promoting AMPK‐α1 degradation in BR cells. RNF44 expression in BR cells was upregulated by transcription factor CREB triggered by hyperactivation of ERK/AKT. High levels of RNF44 corresponding to low levels of AMPK‐α1 appeared in BR xenografts and melanoma tumor samples from BR and BRAFi/MEK inhibitor (MEKi)‐resistant (BMR) melanoma patients. Similar to BR cells, BMR cells were also sensitive to arginine deprivation. Our study provides a novel insight into the mechanism whereby BRAFi or BRAFi/MEKi resistance drives proteasomal degradation of AMPK‐α1 and consequently regulates autophagy and metabolic reprogramming in melanoma cells.
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Affiliation(s)
- Ying-Ying Li
- Department of Medicine, University of Miami Miller School of Medicine, FL, USA.,Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, FL, USA
| | - Chunjing Wu
- Division of Hematology and Oncology, Miami Veterans Affairs Healthcare System, FL, USA
| | - Sumedh S Shah
- Dauer Electron Microscopy Lab, Department of Biology, University of Miami, FL, USA
| | - Shu-Mei Chen
- Department of Neurosurgery, Taipei Medical University-Wan Fang Hospital, Taiwan.,Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan
| | - Medhi Wangpaichitr
- Division of Hematology and Oncology, Miami Veterans Affairs Healthcare System, FL, USA.,Department of Surgery, University of Miami Miller School of Medicine, FL, USA
| | - Macus T Kuo
- Department of Molecular Pathology, University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
| | - Lynn G Feun
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, FL, USA
| | - Xiaoqing Han
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, FL, USA.,Department of Surgery, University of Miami Miller School of Medicine, FL, USA
| | - Miguel Suarez
- Department of Laboratory Medicine, Miami Veterans Affairs Healthcare System, FL, USA
| | - Jeffrey Prince
- Dauer Electron Microscopy Lab, Department of Biology, University of Miami, FL, USA
| | - Niramol Savaraj
- Department of Medicine, University of Miami Miller School of Medicine, FL, USA.,Division of Hematology and Oncology, Miami Veterans Affairs Healthcare System, FL, USA
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19
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Kovalevich T, Boyer P, Suarez M, Salut R, Kim MS, Herzig HP, Bernal MP, Grosjean T. Polarization controlled directional propagation of Bloch surface wave. Opt Express 2017; 25:5710-5715. [PMID: 28380827 DOI: 10.1364/oe.25.005710] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bloch surface waves (BSWs) are recently developing alternative to surface plasmon polaritons (SPPs). Due to dramatically enhanced propagation distance and strong field confinement these surface states can be successfully used in on-chip all-optical integrated devices of increased complexity. In this work we propose a highly miniaturized grating based BSW coupler which is gathering launching and directional switching functionalities in a single element. This device allows to control with polarization the propagation direction of Bloch surface waves at subwavelength scale, thus impacting a large panel of domains such as optical circuitry, function design, quantum optics, etc.
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20
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Li YY, Wu C, Chen SM, Shah SS, Wangpaichitr M, Feun LG, Kuo MT, Suarez M, Prince J, Savaraj N. BRAF inhibitor resistance enhances vulnerability to arginine deprivation in melanoma. Oncotarget 2017; 7:17665-80. [PMID: 26771234 PMCID: PMC4951241 DOI: 10.18632/oncotarget.6882] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 09/28/2015] [Accepted: 01/03/2016] [Indexed: 12/22/2022] Open
Abstract
BRAF inhibitor (BRAFi) has been used for treatment of melanomas harboring V600E mutation. Despite a high initial response rate, resistance to BRAFi is inevitable. Here, we demonstrate that BRAFi-resistant (BR) melanomas are susceptible to arginine deprivation due to inability to initiate re-expression of argininosuccinate synthetase (ASS1, a key enzyme for arginine synthesis) as well as ineffective autophagy. Autophagy and ASS1 re-expression are known to protect melanoma cells from cell death upon arginine deprivation. When melanoma cells become BR cells by long-term in vitro incubation with BRAFi, c-Myc-mediated ASS1 re-expression and the levels of autophagy-associated proteins (AMPK-α1 and Atg5) are attenuated. Furthermore, our study uncovers that downregulation of deubiquitinase USP28 which results in more active c-Myc degradation via ubiquitin-proteasome machinery is the primary mechanism for inability to re-express ASS1 upon arginine deprivation in BR cells. Overexpression of USP28 in BR cells enhances c-Myc expression and hence increases ASS1 transcription upon arginine deprivation, and consequently leads to cell survival. On the other hand, overexpression of Atg5 or AMPK-α1 in BR cells can redirect arginine deprivation-induced apoptosis toward autophagy. The xenograft models also confirm that BR tumors possess lower expression of ASS1 and are hypersensitive to arginine deprivation. These biochemical changes in BRAFi resistance which make them vulnerable to arginine deprivation can be exploited for the future treatment of BR melanoma patients.
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Affiliation(s)
- Ying-Ying Li
- Sheila and David Fuente Graduate Program in Cancer Biology, University of Miami Miller School of Medicine, Miami, Florida, USA.,Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Chunjing Wu
- Division of Hematology and Oncology, Miami Veterans Affairs Healthcare System, Miami, Florida, USA
| | - Shu-Mei Chen
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan.,Department of Neurosurgery, Taipei Medical University-Wan Fang Hospital, Taipei, Taiwan
| | - Sumedh S Shah
- Dauer Electron Microscopy Laboratory, Department of Biology, University of Miami, Miami, FL, USA
| | - Medhi Wangpaichitr
- Division of Hematology and Oncology, Miami Veterans Affairs Healthcare System, Miami, Florida, USA.,Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Lynn G Feun
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Macus T Kuo
- Department of Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Miguel Suarez
- Department of Laboratory Medicine, Miami Veterans Affairs Healthcare System, Miami, Florida, USA
| | - Jeffrey Prince
- Dauer Electron Microscopy Laboratory, Department of Biology, University of Miami, Miami, FL, USA
| | - Niramol Savaraj
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida, USA.,Division of Hematology and Oncology, Miami Veterans Affairs Healthcare System, Miami, Florida, USA
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21
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Kovalevich T, Ndao A, Suarez M, Tumenas S, Balevicius Z, Ramanavicius A, Baleviciute I, Häyrinen M, Roussey M, Kuittinen M, Grosjean T, Bernal MP. Tunable Bloch surface waves in anisotropic photonic crystals based on lithium niobate thin films. Opt Lett 2016; 41:5616-5619. [PMID: 27906253 DOI: 10.1364/ol.41.005616] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present an original type of one-dimensional photonic crystal that includes one anisotropic layer made of a lithium niobate thin film. We demonstrate the versatility of such a device sustaining different Bloch surface waves (BSWs), depending on the orientation of the incident wave. By varying the orientation of the illumination of the multilayer, we measured an angle variation of 7° between the BSWs corresponding to the extraordinary and the ordinary index of the lithium niobate thin film. The potential of such a platform opens the way to novel tunable and active planar optics based on the electro- and thermo-optical properties of lithium niobate.
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22
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Paola S, Avalos A, Maidana L, Suarez M, Marecos E, Oreggioni G. CORRELATION OF THE MORPHOMETRIC CHANGES IN KIDNEY AND BONE MARROW IN DOGS NATURALLY INFECTED WITH Leishmania sp. Compend cienc vet 2016. [DOI: 10.18004/compend.cienc.vet.2016.06.01.11-16] [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: 10/20/2022] Open
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23
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Courjal N, Caspar A, Calero V, Ulliac G, Suarez M, Guyot C, Bernal MP. Simple production of membrane-based LiNbO 3 micro-modulators with integrated tapers. Opt Lett 2016; 41:5110-5113. [PMID: 27805697 DOI: 10.1364/ol.41.005110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on free-standing electro-optical LiNbO3 waveguides with integrated tapers made by optical grade dicing. Membranes with a calibrated thickness are produced simultaneously with tapers acting as spot-size converters. Thereby, thicknesses from 450 to 500 μm can simply be achieved together with integrated tapers guaranteeing low insertion losses. These developments open the way to the low-cost production of compact and low-power-consuming electro-optical components. As an example, a 200 μm-long free-standing electro-optical Fabry-Perot is demonstrated with a figure of merit of only 0.19 V·cm in a 4.5 μm-thick membrane.
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Amarilla S, Avalos A, Suarez M, Marecos E, González E. PORCINE REPRODUCTIVE AND RESPIRATORY SYNDROME (PRRS): EPIDEMIOLOGY, SYMPTOMS AND LESIONS. Compend cienc vet 2016. [DOI: 10.18004/compend.cienc.vet.2015.05.02.38-46] [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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25
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Li YY, Wu C, Shah S, Chen SM, Wangpaichitr M, Feun L, Kuo M, Suarez M, Savaraj N. Abstract 2671: BRAF inhibitor resistance reprograms metabolic and survival pathways to sensitize melanoma cells to arginine deprivation. Cancer Res 2016. [DOI: 10.1158/1538-7445.am2016-2671] [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: 11/16/2022]
Abstract
Abstract
The combination of BRAF inhibitor (BRAFi) and MEK inhibitor (MEKi) has been FDA approved to treat melanomas harboring (V600E) mutation. Although most BRAF mutant melanomas are highly responsive to these treatments, they all relapse ultimately. In this study, we found a unique mechanism which can be used to treat BRAFi resistant patients. Five BRAFi resistant (BR) cells were established from known BRAF mutant cell lines A375, MEL-1220, A2058, UACC-62, and SK-MEL28 by long-term exposure to BRAFi. These BR cells are hypersensitive to ADI-PEG20, an enzyme which degrades arginine to citrulline. ADI-PEG20 treatment resulted in a 2-3-fold decrease in BR cell viability (MTT assay) and 10-30% increase in apoptosis (Annexin V/PI) in BR cells compared to their paternal cells. The mechanisms involved are as follows: All BR cells express very low levels or do not express argininosuccinate synthetase (ASS, a key enzyme to generate arginine from citrulline). Thus, these BR cells rely primarily on exogenous arginine. Furthermore, these BR cells also have attenuation of glucose uptake which makes them rely mainly on amino acids. Importantly, their ability to undergo autophagy upon nutritional stress is also impaired. The underlying mechanism for low levels of ASS is due to diminished c-Myc expression which is a positive regulator for ASS. Additionally, AMPK-α1, which possesses phosphorylation site at Thr172 governing autophagy and glucose uptake, was attenuated in BR cells. Overexpression of AMPK-α1 using plasmid transfection in A2058BR and MEL-1220BR cells rescued 8-28% ADI-PEG20-induced apoptosis and enhanced autophagosome formation (detected by LysoTacker). Conversely, knockdown of AMPK-α1 using siRNA significantly enhanced ADI-PEG20-reduced cell viability (compared to non-targeting siRNA) in A2058 and MEL-1220 cells through attenuation of autophagy and glucose uptake. This is evidenced by decreased GLUT1 and LC3-II expression, and low activity of 2-NBDG uptake, which also can be seen in most BR cells. The xenograft model also showed that ADI-PEG20 aborted tumor growth of A2058BR and A375BR cells but retarded growth of A2058 and A375 cells. Immunohistochemical staining further confirmed lower levels of ASS and AMPK-α1 in A2058BR xenograft and in tumor tissues from 10 BR patients relative to their parental counterparts (average H-scores of ASS and AMPK in parental tissues vs. BR tissues are 58.2 vs. 7.8, and 146 vs. 78.3, respectively, p <0.03). Importantly, these findings also apply to cell lines and tumor samples from patients who failed both BRAF and MEK inhibitor. In summary, our data suggest that attenuated AMPK-α1 mediated autophagy and glucose uptake and decreased c-Myc mediated ASS re-expression sensitize BR cells to arginine deprivation. Thus, ADI-PEG20 is a potential salvage therapy for BR patients (Supported by R01CA152197).
Citation Format: Ying-Ying Li, Chunjing Wu, Sumedh Shah, Shu-Mei Chen, Medhi Wangpaichitr, Lynn Feun, Macus Kuo, Miguel Suarez, Niramol Savaraj. BRAF inhibitor resistance reprograms metabolic and survival pathways to sensitize melanoma cells to arginine deprivation. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 2671.
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Affiliation(s)
- Ying-Ying Li
- 1University of Miami/VA Medical Center, Miami, FL
| | - Chunjing Wu
- 1University of Miami/VA Medical Center, Miami, FL
| | | | - Shu-Mei Chen
- 3Taipei Medical University-Wan Fang Hospital, Taipei, Taiwan
| | | | - Lynn Feun
- 4University of Miami/Sylvester Comprehensive Cancer Center, Miami, FL
| | - Macus Kuo
- 5University of Texas M. D. Anderson Cancer Center, Houston, TX
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Dahdouh E, Orgaz B, Gómez-Gil R, Mingorance J, Daoud Z, Suarez M, San Jose C. Patterns of biofilm structure and formation kinetics among Acinetobacter baumannii clinical isolates with different antibiotic resistance profiles. Med Chem Commun 2016. [DOI: 10.1039/c5md00377f] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study evaluates the rates of biofilm formation in light of the different characteristics of twelve A. baumannii clinical isolates.
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Affiliation(s)
- E. Dahdouh
- Faculty of Veterinary
- Department of Animal Health
- University Complutense of Madrid
- Madrid
- Spain
| | - B. Orgaz
- Faculty of Veterinary
- Department of Food Science and Technology
- University Complutense of Madrid
- Madrid
- Spain
| | - R. Gómez-Gil
- Servicio de Microbiología
- Hospital Universitario La Paz
- IdiPAZ
- Madrid
- Spain
| | - J. Mingorance
- Servicio de Microbiología
- Hospital Universitario La Paz
- IdiPAZ
- Madrid
- Spain
| | - Z. Daoud
- Faculty of Medicine and Medical Sciences
- Department of Clinical Microbiology
- University of Balamand
- Amioun
- Lebanon
| | - M. Suarez
- Faculty of Veterinary
- Department of Animal Health
- University Complutense of Madrid
- Madrid
- Spain
| | - C. San Jose
- Faculty of Veterinary
- Department of Food Science and Technology
- University Complutense of Madrid
- Madrid
- Spain
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27
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Guichón R, García Laborde P, Motti J, Martucci M, Casali R, Huilinao F, Maldonado M, Salamanca M, Bilte B, Guevara A, Gallardo Pantoja C, Suarez M, Salerno M, Valenzuela L, D'Angelo del Campo M, Palacio P. Joint work experiences between researchers and native communities, the case of Southern Patagonia. rev arg antrop biol 2015. [DOI: 10.17139/raab.2015.0017.02.05] [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: 11/20/2022] Open
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28
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Montserrat-Capella D, Suarez M, Ortiz L, Mira JJ, Duarte HG, Reveiz L, on behalf of the AMBEAS Group, Cho M, Rodriguez H, Milberg M, Dieguez MG, Tristan M, Granados R, Puertas B, Artaza O, Varella DAA, FitzGerald J, Torres FH, Iglesias C, Garcia LHL, da Silva Lima R, Munoz S, Oliveira DC, Valdes MYR, Sagastuy B, Varela JS, de Sousa FC, Souza F, Torres R. Frequency of ambulatory care adverse events in Latin American countries: the AMBEAS/PAHO cohort study. Int J Qual Health Care 2015; 27:52-9. [DOI: 10.1093/intqhc/mzu100] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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29
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Sola R, Valls R, Farras M, Suarez M, Fernandez-Castillejo S, Fito M, Konstantinidou V, Pedret A, Fuentes F, Lopez-Miranda J, Giralt M, Covas M, Motilva M. Functional olive oils functions. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.750] [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: 11/28/2022]
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30
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Geller T, Prakash V, Batanian J, Guzman M, Duncavage E, Gershon T, Crowther A, Wu J, Liu H, Fang F, Davis I, Tripolitsioti D, Ma M, Kumar K, Grahlert J, Egli K, Fiaschetti G, Shalaby T, Grotzer M, Baumgartner M, Braoudaki M, Lambrou GI, Giannikou K, Millionis V, Papadodima SA, Settas N, Sfakianos G, Stefanaki K, Kattamis A, Spiliopoulou CA, Tzortzatou-Stathopoulou F, Kanavakis E, Gholamin S, Mitra S, Feroze A, Zhang M, Esparza R, Kahn S, Richard C, Achrol A, Volkmer A, Liu J, Volkmer J, Majeti R, Weissman I, Cheshier S, Bhatia K, Brown N, Teague J, Lo P, Challis J, Beshay V, Sullivan M, Mechinaud F, Hansford J, Arifin MZ, Dahlan RH, Sobana M, Saputra P, Tisell MT, Danielsson A, Caren H, Bhardwaj R, Chakravadhanula M, Hampton C, Ozals V, Georges J, Decker W, Kodibagkar V, Nguyen A, Legrain M, Gaub MP, Pencreach E, Chenard MP, Guenot D, Entz-Werle N, Kanemura Y, Ichimura K, Shofuda T, Nishikawa R, Yamasaki M, Shibui S, Arai H, Xia J, Brian A, Prins R, Pennell C, Moertel C, Olin M, Bie L, Zhang X, Liu H, Olsson M, Kling T, Nelander S, Biassoni V, Bongarzone I, Verderio P, Massimino M, Magni R, Pizzamiglio S, Ciniselli C, Taverna E, De Bortoli M, Luchini A, Liotta L, Barzano E, Spreafico F, Visse E, Sanden E, Darabi A, Siesjo P, Jackson S, Cohen K, Lin D, Burger P, Rodriguez F, Yao X, Liucheng R, Qin L, Na T, Meilin W, Zhengdong Z, Yongjun F, Pfeifer S, Nister M, de Stahl TD, Basmaci E, Orphanidou-Vlachou E, Brundler MA, Sun Y, Davies N, Wilson M, Pan X, Arvanitis T, Grundy R, Peet A, Eden C, Ju B, Phoenix T, Nimmervoll B, Tong Y, Ellison D, Lessman C, Taylor M, Gilbertson R, Folgiero V, del Bufalo F, Carai A, Cefalo MG, Citti A, Rutella S, Locatelli F, Mastronuzzi A, Maher O, Khatua S, Zaky W, Lourdusamy A, Meijer L, Layfield R, Grundy R, Jones DTW, Capper D, Sill M, Hovestadt V, Schweizer L, Lichter P, Zagzag D, Karajannis MA, Aldape KD, Korshunov A, von Deimling A, Pfister S, Chakrabarty A, Feltbower R, Sheridon E, Hassan H, Shires M, Picton S, Hatziagapiou K, Braoudaki M, Lambrou GI, Tsorteki F, Tzortzatou-Stathopoulou F, Bethanis K, Gemou-Engesaeth V, Chi SN, Bandopadhayay P, Janeway K, Pinches N, Malkin H, Kieran MW, Manley PE, Green A, Goumnerova L, Ramkissoon S, Harris MH, Ligon KL, Kahlert U, Suarez M, Maciaczyk J, Bar E, Eberhart C, Kenchappa R, Krishnan N, Forsyth P, McKenzie B, Pisklakova A, McFadden G, Kenchappa R, Forsyth P, Pan W, Rodriguez L, Glod J, Levy JM, Thompson J, Griesinger A, Amani V, Donson A, Birks D, Morgan M, Handler M, Foreman N, Thorburn A, Lulla RR, Laskowski J, Fangusaro J, DiPatri AJ, Alden T, Tomita T, Vanin EF, Goldman S, Soares MB, Remke M, Ramaswamy V, Wang X, Jorgensen F, Morrissy AS, Marra M, Packer R, Bouffet E, Pfister S, Jabado N, Taylor M, Cole B, Rudzinski E, Anderson M, Bloom K, Lee A, Leary S, Leprivier G, Remke M, Rotblat B, Agnihotri S, Kool M, Derry B, Pfister S, Taylor MD, Sorensen PH, Dobson T, Busschers E, Taylor H, Hatcher R, Fangusaro J, Lulla R, Goldman S, Rajaram V, Das C, Gopalakrishnan V. TUMOUR BIOLOGY. Neuro Oncol 2014; 16:i137-i145. [PMCID: PMC4046298 DOI: 10.1093/neuonc/nou082] [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: 07/22/2023] Open
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31
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Quiñones M, Guerrero L, Suarez M, Pons Z, Aleixandre A, Arola L, Muguerza B. Low-molecular procyanidin rich grape seed extract exerts antihypertensive effect in males spontaneously hypertensive rats. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.01.023] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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33
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Abeyta M, Zhao Q, Gebhardt J, Suarez M, Reddy V, Behr B. The interchangeability of HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid) and MOPS (3-(N-morpholino)propanesulfonic acid) based solutions for vitrification and subsequent warming. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.326] [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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34
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Zaninovic N, Rosenwaks Z, Iager AE, Kocabas AM, Otu HH, Ruppel P, Langerveld A, Schnarr P, Suarez M, Jarrett JC, Conaghan J, Rosa GJM, Fernandez E, Rawlins RG, Cibelli JB, Crosby J, Kirkegaard K, Hindkjaer J, Ingerslev HJ, Lykke-Hartmann K, Himaya E, Jamal W, Phillips S, Delrieu D, Hamamah S, Kadoch IJ, Cortezzi SS, Cabral EC, Ferreira CR, Trevisan MG, Figueira RCS, Eberlin MN, Iaconelli A, Borges E, Chimote NM, Chimote NN, Nath NM, Chimote MN, Mehta BN. SESSION 02: EMBRYOLOGY - BIOMARKERS. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.2] [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: 11/12/2022] Open
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35
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Dasig J, Zhao J, Reddy V, Gebhardt J, Suarez M, Behr B. Spontaneous Abortion Rates Following Frozen Embryo Transfer: Preliminary Experience Comparing Slow and Vitrified Cryopreservation Methods. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.01.061] [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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36
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Pawlowska A, Wolfson J, Cheng J, Sorrell A, Sato J, Anderson C, Hitt D, Suarez M, Forman S, Rosenthal J. High Dose Chemotherapy (HDT) with Busulfan, Melphalan and Topotecan Followed by Autologous Hematopoietic Stem Cell Transplantation (ASCT) in Pediatric Patients (pts) with High Risk Solid Tumors. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.135] [Citation(s) in RCA: 2] [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: 11/17/2022]
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37
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Kava BR, Ayyathurai R, Soloway CT, Suarez M, Kanagarajah P, Murugesan M. Prospective randomized comparison of the safety, efficacy, and cosmetic outcome associated with mini-transverse and mini-longitudinal radical prostatectomy incisions. Indian J Urol 2011; 26:345-9. [PMID: 21116351 PMCID: PMC2978431 DOI: 10.4103/0970-1591.70563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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] [Indexed: 11/17/2022] Open
Abstract
Aims: Open radical retropubic prostatectomy (ORP) has traditionally been performed through a lower midline incision. Prior efforts to reduce pain and expedite recovery include a variety of alterations in length and the orientation of the incision. The aim of our study is to compare the safety, efficacy, and cosmetic outcomes associated with transverse and longitudinal mini-radical prostatectomy incisions. Materials and Methods: Consecutive patients undergoing ORP at a single institution were studied. Patients were randomized to receive either a modified transverse or longitudinal incision. In all patients, the length of the incision was 7cm. The following parameters were compared between the two groups: Perioperative blood loss, duration of surgery, technical factors, pain and analgesic requirements, length of hospital stay (LOS), and pathological stage. The Patient and Observer Scar Assessment Scale (POSAS) was used to compare the cosmetic aspects associated with the incisions. Results: Fifty-six patients underwent a transverse (n=27) and longitudinal (n=29) mini- incision ORP. No significant differences were noted in the perioperative parameters that were compared (P>0.116). None of the patients required blood transfusion, there were no wound complications. Perioperative pain and analgesic requirements were not significantly different among the two study arms (P>0.433). The POSAS indicated no significant difference in cosmesis scores with both incisions (P>0.09). Conclusions: Seven-centimeter transverse and longitudinal mini-incisions offer alternatives to the standard ORP incision, and to minimally invasive approaches. Both incisions are safe, associated with little postoperative pain, and a short postoperative LOS. Both incisions provide highly satisfactory cosmesis for the patient.
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Affiliation(s)
- Bruce R Kava
- Department of Urology, University of Miami, Miami, Florida
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38
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Ortiz de Urbina J, Valdivieso A, Matarranz A, Gastaca M, Fernandez J, Bustamante J, Gonzalez J, Ventoso A, Testillano M, Ruiz P, Suarez M. Advagraf De Novo in Liver Transplantation: A Single-Center Experience. Transplant Proc 2011; 43:724-5. [DOI: 10.1016/j.transproceed.2011.01.089] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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Castrellon A, Feldman PA, Suarez M, Spector S, Chua L, Byrnes J. Crohn's disease complicated by primary gastrointestinal Hodgkin's lymphoma presenting with small bowel perforation. J Gastrointestin Liver Dis 2009; 18:359-361. [PMID: 19795032] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An increased incidence of non-Hodgkin's lymphoma has been reported in patients with inflammatory bowel disease, particularly in those receiving immunosuppressive therapy. Rare cases of Hodgkin;s lymphoma have been reported in a setting of inflammatory bowel disease. The mechanism underlying the apparent association is unclear, but alterations in immune surveillance could play a role. In this report we describe the clinicopathological features of primary gastrointestinal Hodgkin's lymphoma diagnosed in a patient with Crohn's ileocolitis who had been receiving therapy with immunomodulator and biologic therapies.
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Affiliation(s)
- Aurelio Castrellon
- University of Miami, Miami Veteran Administration Hospital, Miami, FL, USA.
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40
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de la Fuente L, Suarez M, Belza MJ, Vallejo F, García M, Alvarez R, Castilla J, Rodés A. Human immunodeficiency virus testing uptake and risk behaviours in Spain. J Epidemiol Community Health 2009; 63:552-8. [PMID: 19525249 DOI: 10.1136/jech.2008.076240] [Citation(s) in RCA: 17] [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: 11/03/2022]
Abstract
BACKGROUND The purpose of this study was to estimate the prevalence of human immunodeficiency (HIV) testing in the general population; to analyse factors related to voluntary testing; and to describe the main reasons for testing, the kinds of health services where testing takes place and the relations between self-risk perception and HIV testing. METHODS A probability sample survey of health and sexual behaviour in men and women aged 18-49 years and resident in Spain in 2003 (n = 10 980) was used. A combination of face-to-face and computer-assisted self-interview was used, and bivariate and multivariate logistic regression analyses were performed. RESULTS Some 39.4% (40.2% in men and 38.5% in women) had ever been tested, blood donation being the main reason for men and pregnancy for women. In the multivariate analysis, HIV testing was associated with foreign nationality, high educational level, having injected drugs and having a large number of sexual partners. In men, it was also associated with age 30-39 years, having had sex with other men and having paid for sex. About 29.3% of men and 32.8% of women had their last voluntary HIV test in primary healthcare centres, whereas only 3.4% of men and 3.6% of women had last been tested in sexually transmitted infection/HIV diagnostic centres. About 20.2% of men and 5.5% of women with risk behaviours had never been tested. CONCLUSION The proportion of men with risk behaviours who have never had an HIV test is unacceptably high in Spain. Scaling up access to HIV testing in this population group remains a challenge for health policies and research.
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Affiliation(s)
- L de la Fuente
- Centro Nacional de Epidemiología, Instituto de Salud Carlos III, Madrid, Spain.
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41
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Martínez-Piñeiro L, Hidalgo L, Suarez M, Picazo M, Pérez Higueras A, San Millán J, Martínez-Piñeiro J. Arterio-kalikale Fistel nach perkutaner Nephrostomie. Aktuelle Urol 2008. [DOI: 10.1055/s-2008-1060489] [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]
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42
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Kertzman Z, Marchal J, Suarez M, Staia MH, Filip P, Kohli P, Aouadi SM. Mechanical, tribological, and biocompatibility properties of ZrN-Ag nanocomposite films. J Biomed Mater Res A 2008; 84:1061-7. [PMID: 17685406 DOI: 10.1002/jbm.a.31533] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [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: 11/05/2022]
Abstract
Nanocomposite films of ZrN-Ag were produced by reactive unbalanced magnetron sputtering, and their structural, chemical, mechanical, tribological, haemocompatibility, and antibacterial properties were studied as a function of film composition. The films formed a dense and homogeneous microstructure whereby nanocrystals of Ag are distributed evenly throughout the ZrN matrix. For small additions of silver, the hardness was found to increase, whereas the elastic modulus was found to decrease drastically. In the process of optimizing the deposition conditions, three kinds of coatings were prepared on 316 L surgical steel and tested by accelerated electrochemical polarization tests in order to detect the influence of Ag and the value of the bias potential on the corrosion performance of the system. Films produced under the optimum deposition conditions were, subsequently, deposited on medical grade Ti-Al-V and worn against ball-bearing steel using a ball-on-disk tribotester in bovine serum and were found to have superior tribological properties compared with single-phase ZrN coatings. The haemocompatibility of the films was assessed by investigating the adsorption of human serum albumin and fibrinogen on samples with different phase compositions. Quantification of the protein adsorption was carried out using spectroscopic ellipsometry, which confirmed the haemocompatibility of the films. Antibiotic activity of the films was quantified by incubating the films in bacterial cultures, namely, Staphylococcus epidermis, Staphylococcus aureus, and Escherichia coli. Films with a silver content > 10% exhibited superior antibacterial activity compared with the uncoated samples.
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Affiliation(s)
- Z Kertzman
- Department of Physics, Southern Illinois University, Carbondale, Illinois 62901, USA
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43
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Murthy NV, Passchier J, Gunn R, Searle G, Bullich S, Suarez M, Herance R, Farre M, Herdon H, Porter R, Sutherland S, Fagg R, Neve M, Slifstein M, Laruelle M, Catafau A. [11C]GSK931145: A new pet ligand for glycine transporter 1. Neuroimage 2008. [DOI: 10.1016/j.neuroimage.2008.04.195] [Citation(s) in RCA: 2] [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: 10/21/2022] Open
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44
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Abstract
BACKGROUND A number of recent case reports and case series suggest that proton pump inhibitors may cause acute interstitial nephritis. AIM To establish the nature of the relationship (cause or association) between proton pump inhibitor use and development of interstitial nephritis. DATA COLLECTION Two researchers independently searched electronic databases (MEDLINE, EMBASE, GOOGLE, LILACS, COCHRANE) for articles from 1970 to 2006, including all study designs, populations and languages. Two independent reviewers assessed study quality and collected the data. SELECTION CRITERIA absence of baseline renal failure, development of interstitial nephritis after proton pump inhibitor exposure, nephritis confirmed by creatinine plus either renal biopsy or recurrence upon reinitiating proton pump inhibitor. RESULTS Sixty four cases (60% females, mean age 78 years) of proton pump inhibitor-associated interstitial nephritis were found, 60 included in this review (59 confirmed by renal biopsy, one by recurrence upon reinitiating proton pump inhibitor). The most common symptoms were non-specific. The mean proton pump inhibitor treatment duration before diagnosing nephritis was 13 weeks, average recovery time was 35.5 weeks, one patient required permanent dialysis, there were no deaths. CONCLUSION Proton pump inhibitor-related interstitial nephritis is rare, idiosyncratic and difficult to predict. It requires a high level of clinical suspicion. While there is not sufficient evidence to establish a causal relationship with certainty, there does appear to be a low-prevalence association.
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Affiliation(s)
- F Sierra
- Division of Gastroenterology and Hepatology, Fundación Santa Fe de Bogotá, Bogotá, Colombia
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45
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Montagut C, Tusquets I, Ferrer B, Corominas JM, Bellosillo B, Campas C, Suarez M, Fabregat X, Campo E, Gascon P, Serrano S, Fernandez PL, Rovira A, Albanell J. Activation of nuclear factor-kappa B is linked to resistance to neoadjuvant chemotherapy in breast cancer patients. Endocr Relat Cancer 2006; 13:607-16. [PMID: 16728586 DOI: 10.1677/erc.1.01171] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [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: 11/27/2022]
Abstract
The nuclear factor (NF)-kappaB system is a promising anticancer target due to its role in oncogenesis and chemoresistance in preclinical models. To provide evidence in a clinical setting on the role of NF-kappaB in breast cancer, we aimed to study the value of basal NF-kappaB/p65 in predicting resistance to neoadjuvant chemotherapy, and to characterise the pharmacodynamic changes in NF-kappaB/p65 expression following chemotherapy in patients with locally advanced breast cancer. Pre- and post-chemotherapy tumour specimens from 51 breast cancer patients treated with anthracycline- and/or taxane-containing neoadjuvant chemotherapy were assayed by immunohistochemistry for NF-kappaB/p65 subcellular expression. We studied NF-kappaB/p65, a well-characterised member of the NF-kappaB family that undergoes nuclear translocation when NF-kappaB is activated. Activation of NF-kappaB (i.e. nuclear NF-kappaB/p65 staining in pre-therapy specimens) was linked to chemoresistance. Patients with NF-kappaB/p65 nuclear staining in pre-treatment samples had a 20% clinical response rate, while patients with undetected nuclear staining had a 91% response rate to chemotherapy (P = 0.002). Notably, four patients achieved a complete histological response and none of them had pre-treatment NF-kappaB/p65 nuclear staining. Moreover, the number of patients with NF-kappaB/p65 activation increased after chemotherapy exposure. It is concluded that NF-kappaB/p65 activation assayed by immunohistochemistry is a predictive factor of resistance to neoadjuvant chemotherapy in breast cancer patients. Moreover, NF-kappaB activation was inducible following chemotherapy in a proportion of breast cancer patients. These novel clinical findings strengthen the rationale for the use of NF-kappaB inhibitors to prevent or overcome chemoresistance in breast cancer.
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Affiliation(s)
- C Montagut
- Medical Oncology Department, Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Hospital Clinic, Barcelona 08035, Spain
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Bosco C, Parra M, Barja P, Rodrigo R, Fernández V, Suarez M, Muñoz H. Increased immunohistochemical expression of thrombomodulin at placental perivascular myofibroblast in severe preeclampsia (PE). Histol Histopathol 2006; 20:1045-55. [PMID: 16136486 DOI: 10.14670/hh-20.1045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The presence of pro-coagulant and anti-coagulant components of the placental vascular endothelium and syncytiotrophoblast are essential for homeostasis. Vascular endothelium prevents blood clot formation in vivo by involving a cell surface thrombin-binding glycoprotein, thrombomodulin (TM), that activates plasma anti-coagulant protein C. The TM levels increase during pregnancy, but the fibrinolytic capacity diminishes. Since vascular lesions with placental coagulation disorders can be associated with preeclampsia (PE), we hypothesized that TM expression in the stem villous vasculature and syncytiotrophoblast of the placenta are impaired in PE. Plasma and placental tissue samples were collected from PE (n=12) and normotensive pregnant patients (n=11). Patient's gestational age was 35.7+/-1.2 (normotensive) and 30.6+/-1.5 weeks (PE). Blood samples were drawn 30 min before delivery. Serum PAI-1 and PAI-2 antigens were determined by enzyme-linked immunoabsorbent assay (ELISA). A monoclonal antibody specific for TM was used for immunohistochemical tissue staining (ABC) and the staining was quantified by semi quantitative scores. Results show no intensity differences at the apical syncytiotrophoblast between the two groups. However, in preeclamptic placenta, TM expression diminished in the endothelium of the stem villi arteries and increased in the perivascular and stromal myofibroblats in cases of severe PE. TM changes were associated with an increased PAI-1/PAI-2 ratio. It is suggested that in severe PE, the decreased placental blood flow may be due to structural and functional impairment of the endothelium of the stem villi vessels and the surrounding perivascular and stromal myofibroblast, by increasing TM expression which may modulate fetal blow flow in the villous tree.
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Affiliation(s)
- C Bosco
- Anatomy and Development Biology Program, Molecular and Clinical Pharmacology Program and Pathology Program, ICBM Faculty of Medicine, University of Chile, Santiago.
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Bullich S, Ros D, Pavia J, Suarez M, Cot A, Perich J, Catafau A. Neurotransmission SPECT and MR registration combining mutual and gradient information. Neuroimage 2006. [DOI: 10.1016/j.neuroimage.2006.04.080] [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: 10/24/2022] Open
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48
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Ruiz P, Suarez M, Nishida S, de la Cruz V, Nicolas M, Weppler D, Khaled A, Bejarano P, Kato T, Mittal N, Icardi M, Tzakis A. Sclerosing mesenteritis in small bowel transplantation: possible manifestation of acute vascular rejection. Transplant Proc 2004; 35:3057-60. [PMID: 14697979 DOI: 10.1016/j.transproceed.2003.10.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Acute rejection of human small bowel allografts is characterized by clinical symptoms combined with characteristic morphologic alterations. The typical geographic distribution of acute rejection in the bowel is involvement of the intestinal parenchyma, which can be transmural, particularly when the rejection is more severe. However, little is known concerning the potential for donor-derived soft tissue adjacent to the bowel to become involved by the host alloimmune response. METHODS We describe a male patient who, several weeks after combined small bowel and liver transplantation, demonstrated sclerosing mesenteritis with vasculitis and acute rejection of the bowel. RESULTS The vascular lesions in the mesentery demonstrated increased IgG deposition and the patient developed an alloantibody to the donor. CONCLUSIONS The changes described herein may represent a novel presentation of acute vascular rejection.
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Affiliation(s)
- P Ruiz
- Department of Pathology, University of Miami School of Medicine, J M H Holtz Center #2101, 1611 NW 12th Avenue, Miami, FL 33101, USA.
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Fregene MA, Suarez M, Mkumbira J, Kulembeka H, Ndedya E, Kulaya A, Mitchel S, Gullberg U, Rosling H, Dixon AGO, Dean R, Kresovich S. Simple sequence repeat marker diversity in cassava landraces: genetic diversity and differentiation in an asexually propagated crop. Theor Appl Genet 2003; 107:1083-93. [PMID: 12856084 DOI: 10.1007/s00122-003-1348-3] [Citation(s) in RCA: 29] [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] [Subscribe] [Scholar Register] [Received: 01/27/2003] [Accepted: 05/23/2003] [Indexed: 05/18/2023]
Abstract
Cassava (Manihot esculenta) is an allogamous, vegetatively propagated, Neotropical crop that is also widely grown in tropical Africa and Southeast Asia. To elucidate genetic diversity and differentiation in the crop's primary and secondary centers of diversity, and the forces shaping them, SSR marker variation was assessed at 67 loci in 283 accessions of cassava landraces from Africa (Tanzania and Nigeria) and the Neotropics (Brazil, Colombia, Peru, Venezuela, Guatemala, Mexico and Argentina). Average gene diversity (i.e., genetic diversity) was high in all countries, with an average heterozygosity of 0.5358 +/- 0.1184. Although the highest was found in Brazilian and Colombian accessions, genetic diversity in Neotropical and African materials is comparable. Despite the low level of differentiation [F(st)(theta) = 0.091 +/- 0.005] found among country samples, sufficient genetic distance (1-proportion of shared alleles) existed between individual genotypes to separate African from Neotropical accessions and to reveal a more pronounced substructure in the African landraces. Forces shaping differences in allele frequency at SSR loci and possibly counterbalancing successive founder effects involve probably spontaneous recombination, as assessed by parent-offspring relationships, and farmer-selection for adaptation.
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Affiliation(s)
- M A Fregene
- Centro Internacional de Agricultura Tropical, Cali, Colombia.
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