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Ramjit A, Saif N, Lei B, Portal D, Mahmud A, Moussavi M. Abstract No. 236 Retrospective review of middle meningeal artery embolization for symptomatic, expanding or non-regressing chronic subdural hematoma: findings and techniques. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Portal D, Hofstetter L, Eshed I, Dan-Lantsman C, Sella T, Urban D, Onn A, Bar J, Segal G. L3 skeletal muscle index (L3SMI) is a surrogate marker of sarcopenia and frailty in non-small cell lung cancer patients. Cancer Manag Res 2019; 11:2579-2588. [PMID: 31114324 PMCID: PMC6497853 DOI: 10.2147/cmar.s195869] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [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: 11/24/2018] [Accepted: 02/23/2019] [Indexed: 12/20/2022] Open
Abstract
Background: Non-small cell lung cancer (NSCLC) is a common and highly lethal disease. As advanced treatment modalities are being developed, improved prognostication methods are sought. L3 skeletal muscle index (L3SMI) and alanine aminotransferase (ALT) levels are accepted surrogate markers of sarcopenia and related frailty. We aimed to evaluate the potential association of these markers with NSCLC patients’ survival. Methods: A retrospective, single-center study of an NSCLC patients’ cohort. L3SMI was calculated based on skeletal muscle area on computed tomography scans at the level of the L3 vertebra. Clinical data were extracted from clinical charts. Results: A total of 140 patients (56.4% males, median age 66 [range 37–86]) were included in this study, 32% were diagnosed at stage 3 and 45% at stage 4. During the follow-up duration (median of 1.9 years; range 1 month to 6.4 years), 102 patients (72.8%) died. Patients’ characteristics that were found to be associated with increased mortality were performance status, albumin and tumor stage at diagnosis. Sarcopenia, defined as low L3SMI (lower than 41 cm2/m2 for women and lower than 53 cm2/m2 for men) was significantly associated with higher risk of mortality compared with patients with normal L3SMI values (77.2%, vs 64.6%, p=0.013) in univariate analysis, but not in a multiple regression analysis. Conclusion: Low L3SMI could serve as a surrogate marker for sarcopenia and frailty and, as such, facilitate the prognostication process of NSCLC patients.
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Affiliation(s)
- D Portal
- Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - L Hofstetter
- Department of Internal Medicine 'T', Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - I Eshed
- Department of Diagnostic Imaging, Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - C Dan-Lantsman
- Department of Diagnostic Imaging, Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - T Sella
- The Dr. Pinchas Borenstein Talpiot Medical Leadership Program, Sheba Medical Center, Ramat Gan, Israel.,Institute of Oncology, Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - D Urban
- Institute of Oncology, Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - A Onn
- Institute of Oncology, Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel.,Institute of Pulmonary Medicine, Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - J Bar
- Institute of Oncology, Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - G Segal
- Department of Internal Medicine 'T', Chaim Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
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Portal D, Rosendorff A, Kieff E. Epstein-Barr nuclear antigen leader protein coactivates transcription through interaction with histone deacetylase 4. Proc Natl Acad Sci U S A 2006; 103:19278-83. [PMID: 17159145 PMCID: PMC1748217 DOI: 10.1073/pnas.0609320103] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Epstein-Barr nuclear antigen (EBNA) leader protein (EBNALP) coactivates promoters with EBNA2 and is important for Epstein-Barr virus immortalization of B cells. Investigation of the role of histone deacetylases (HDACs) in EBNALP and EBNA2 promoter regulation has now identified EBNALP and EBNA2 to be associated with HDAC4 in a lymphoblastoid cell line. Furthermore, a transcription-deficient EBNALP point mutant did not associate with HDAC4. HDAC4 and 5 overexpression repressed EBNA2 activation and EBNALP coactivation, whereas other HDACs had little effect. Moreover, EBNALP expression decreased nuclear HDAC4. Expression of 14-3-3 anchors HDAC4 in the cytoplasm, increased EBNALP effects, and reversed HDAC4 or 5 repression. HDAC4 reversal depended on the HDAC4 nuclear export sequence. Consistent with EBNALP coactivation being mediated by nuclear HDAC4 depletion, HDAC4 overexpression increased nuclear HDAC4 and specifically repressed EBNA2-dependent activation as well as EBNALP-dependent coactivation. Also, EBNALP, HDAC4, and 14-3-3 could be immunoprecipitated in a single complex. Thus, these data strongly support a model in which EBNALP coactivates transcription by relocalizing HDAC4 and 5 from EBNA2 activated promoters to the cytoplasm. The observed EBNALP effects are likely also in part through HDAC5, which is highly homologous to HDAC4.
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Affiliation(s)
- D. Portal
- Departments of Microbiology and Molecular Genetics and Medicine, Brigham and Women's Hospital, Channing Laboratory, Harvard University, 181 Longwood Avenue, Boston, MA 02115
| | - A. Rosendorff
- Departments of Microbiology and Molecular Genetics and Medicine, Brigham and Women's Hospital, Channing Laboratory, Harvard University, 181 Longwood Avenue, Boston, MA 02115
| | - E. Kieff
- Departments of Microbiology and Molecular Genetics and Medicine, Brigham and Women's Hospital, Channing Laboratory, Harvard University, 181 Longwood Avenue, Boston, MA 02115
- *To whom correspondence should be addressed. E-mail:
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Molina JM, El-Bergmi R, Dobado JA, Portal D. On the aromaticity and Meisenheimer rearrangement of strained heterocyclic amine, phosphine, and arsine oxides. J Org Chem 2000; 65:8574-81. [PMID: 11112577 DOI: 10.1021/jo0056040] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A theoretical investigation (AIM and ELF analyses together with NMR chemical shifts) has been conducted for three-membered heterocycle (N, P, and As) oxides. An aromatic stabilization was found for the P and As rings. However, the N derivatives displayed a net negative hyperconjugation in the N-O bond formation, without ring aromaticity observed for their electronic properties. The calculated delta(C) and delta(H) shifts also supported the ring delocalization for the P and As unsaturated heterocycle oxides (delta(C) approximately 165 and delta(H) approximately 9 ppm). In addition, these values for 1H-azirine oxide resembled standard C=C double bond values (delta(C) approximately 130 and delta(H) approximately 7 ppm). The different behavior for the N oxides was also observed in their Meisenheimer rearrangement (MR). All the reaction paths, yielding the corresponding hydroxyl structures, were exothermic (G2 method). However, the N derivatives showed the lowest values for activation enthalpy, DeltaH(). The C=C bond influence in the MR was slight, with the same DeltaH values for the saturated and unsaturated paths. This rearrangement for the P and As oxides yielded TSs closer to the reactives; however, the corresponding TSs resembled the products for the N-derivatives. The different reaction paths have been examined by their corresponding AIM and ELF analyses at the B3LYP/6-311G level.
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Affiliation(s)
- J M Molina
- Grupo de Modelización y Diseño Molecular, Instituto de Biotecnología, Campus Fuentenueva s/n, Universidad de Granada, 18071-Granada, Spain
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Abstract
Interaction between factors from Trypanosoma cruzi extracts and AP-1 sequences was studied by electrophoretic mobility shift assays. Using a double-stranded probe carrying the AP-1 sequence from the SV40 promoter, three specific complexes designated A, B, and C were detected. Complexes A and C were formed when using single-stranded probes. The relative amount of complex B, specific for double-stranded DNA, increased as a function of probe length. Complexes were stabilized by cross-linking with UVC irradiation and resolved on denaturing SDS-PAGE. Complex A generated bands of 60- and 39 kDa; complex B produced two bands of 46- and 43 kDa; and complex C generated one band of 43 kDa. The AP-1 binding activity was much higher in purified nuclear preparations than in soluble fractions, and was detected in crude extracts from the three forms of the parasite. The binding signal, however, was much stronger in amastigote and trypomastigote than in the epimastigote forms. Specific binding was increased by oxidative stress. Antibodies raised against peptides corresponding to conserved domains of mammalian c-Jun and c-Fos detected bands of 40- and 60 kDa, respectively, in a nuclear epimastigote preparation.
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Affiliation(s)
- J Espinosa
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Argentina
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Barrero AF, Herrador MM, Quilez JF, Alvarez-Manzaneda R, Portal D, Gavin JA, Gravalos DG, Simmonds MS, Blaney WM. Bioactive sesquiterpenes from Santolina rosmarinifolia subsp. Canescens. A conformational analysis of the germacrane ring. Phytochemistry 1999; 51:529-541. [PMID: 10389267 DOI: 10.1016/s0031-9422(99)00047-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The hexane extract of aerial parts of Santolina rosmarinifolia subsp. canescens afforded eight new sesquiterpenes in addition to known compounds. Their structures were determined by spectroscopic methods and chemical transformations. The conformational analysis of the germacrane constituents was carried out by spectroscopic methods, including NMR at varying temperature and by molecular mechanics calculations. The antifeedant, antibacterial and antitumoral activity of selected compounds has been tested.
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Affiliation(s)
- A F Barrero
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Granada, Spain.
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