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Gerak LR, Maguire DR, Cami-Kobeci G, Olson KM, Traynor JR, Husbands SM, France CP, Acevedo L, Belli B, Flynn P. OREX-1038: a potential new treatment for pain with low abuse liability and limited adverse effects. Behav Pharmacol 2022; 33:377-394. [PMID: 35947066 PMCID: PMC9371589 DOI: 10.1097/fbp.0000000000000684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Drugs targeting mu opioid receptors are the mainstay of clinical practice for treating moderate-to-severe pain. While they can offer excellent analgesia, their use can be limited by adverse effects, including constipation, respiratory depression, tolerance, and abuse liability. Multifunctional ligands acting at mu opioid and nociceptin/orphanin FQ peptide receptors might provide antinociception with substantially improved adverse-effect profiles. This study explored one of these ligands, OREX-1038 (BU10038), in several assays in rodents and nonhuman primates. Binding and functional studies confirmed OREX-1038 to be a low-efficacy agonist at mu opioid and nociceptin/orphanin FQ peptide receptors and an antagonist at delta and kappa opioid receptors with selectivity for opioid receptors over other proteins. OREX-1038 had long-acting antinociceptive effects in postsurgical and complete Freund's adjuvant (CFA)-induced thermal hyperalgesia assays in rats and a warm water tail-withdrawal assay in monkeys. OREX-1038 was active for at least 24 h in each antinociception assay, and its effects in monkeys did not diminish over 22 days of daily administration. This activity was coupled with limited effects on physiological signs (arterial pressure, heart rate, and body temperature) and no evidence of withdrawal after administration of naltrexone or discontinuation of treatment in monkeys receiving OREX-1038 daily. Over a range of doses, OREX-1038 was only transiently self-administered, which diminished rapidly to nonsignificant levels; overall, both OREX-1038 and buprenorphine maintained less responding than remifentanil. These results support the concept of dual mu and nociceptin/orphanin FQ peptide receptor partial agonists having improved pharmacological profiles compared with opioids currently used to treat pain.
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Affiliation(s)
- Lisa R Gerak
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
- Addiction Research, Treatment & Training Center of Excellence, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - David R Maguire
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
- Addiction Research, Treatment & Training Center of Excellence, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Gerta Cami-Kobeci
- Department of Pharmacy and Pharmacology, University of Bath, Bath
- Current address: School of Life Sciences, University of Bedfordshire, Luton, UK
| | - Keith M Olson
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - John R Traynor
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Stephen M Husbands
- Department of Pharmacy and Pharmacology, University of Bath, Bath
- Centre for Therapeutic Innovation, University of Bath, Bath, UK
| | - Charles P France
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
- Addiction Research, Treatment & Training Center of Excellence, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- Department of Psychiatry, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | | | - Barbara Belli
- Orexigen Therapeutics Inc., La Jolla, California, USA
| | - Peter Flynn
- Orexigen Therapeutics Inc., La Jolla, California, USA
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Power L, Acevedo L, Yamashita R, Rubin D, Martin I, Barbero A. Deep learning enables the automation of grading histological tissue engineered cartilage images for quality control standardization. Osteoarthritis Cartilage 2021; 29:433-443. [PMID: 33422705 DOI: 10.1016/j.joca.2020.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 12/22/2020] [Accepted: 12/28/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To automate the grading of histological images of engineered cartilage tissues using deep learning. METHODS Cartilaginous tissues were engineered from various cell sources. Safranin O and fast green stained histological images of the tissues were graded for chondrogenic quality according to the Modified Bern Score, which ranks images on a scale from zero to six according to the intensity of staining and cell morphology. The whole images were tiled, and the tiles were graded by two experts and grouped into four categories with the following grades: 0, 1-2, 3-4, and 5-6. Deep learning was used to train models to classify images into these histological score groups. Finally, the tile grades per donor were averaged. The root mean square errors (RMSEs) were calculated between each user and the model. RESULTS Transfer learning using a pretrained DenseNet model was selected. The RMSEs of the model predictions and 95% confidence intervals were 0.49 (0.37, 0.61) and 0.78 (0.57, 0.99) for each user, which was in the same range as the inter-user RMSE of 0.71 (0.51, 0.93). CONCLUSION Using supervised deep learning, we could automate the scoring of histological images of engineered cartilage and achieve results with errors comparable to inter-user error. Thus, the model could enable the automation and standardization of assessments currently used for experimental studies as well as release criteria that ensure the quality of manufactured clinical grafts and compliance with regulatory requirements.
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Affiliation(s)
- L Power
- Department of Biomedical Engineering, University of Basel, Switzerland; Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
| | - L Acevedo
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
| | - R Yamashita
- Department of Biomedical Data Science, Stanford University School of Medicine, USA.
| | - D Rubin
- Department of Biomedical Data Science, Stanford University School of Medicine, USA.
| | - I Martin
- Department of Biomedical Engineering, University of Basel, Switzerland; Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
| | - A Barbero
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
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3
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Halseth A, Shan K, Gilder K, Malone M, Acevedo L, Fujioka K. Quality of life, binge eating and sexual function in participants treated for obesity with sustained release naltrexone/bupropion. Obes Sci Pract 2018; 4:141-152. [PMID: 29670752 PMCID: PMC5893468 DOI: 10.1002/osp4.156] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 11/27/2017] [Revised: 01/12/2018] [Accepted: 01/15/2018] [Indexed: 12/14/2022] Open
Abstract
Objective This multicenter, randomized, controlled, open‐label trial examined weight‐related quality of life, control over eating behaviour and sexual function after 26 weeks of treatment with either 32 mg naltrexone sustained release (SR)/360 mg bupropion SR plus a comprehensive lifestyle intervention program (NB + CLI, N = 153) or usual care (UC, N = 89), which included minimal lifestyle intervention. Methods Impact of Weight on Quality of Life‐Lite, Binge Eating Scale and Arizona Sexual Experiences Scale were assessed at baseline (BL) and weeks 16 and 26. Results NB + CLI and UC participants lost 9.46 and 0.94% respectively of initial body weight at week 26 (P < 0.0001). NB + CLI participants had greater improvements in Impact of Weight on Quality of Life‐Lite total score than UC participants (P < 0.0001). In participants with moderate/severe Binge Eating Scale scores at BL, 91% of NB + CLI and 18% of UC participants experienced categorical improvements. In participants with Arizona Sexual Experiences Scale‐defined sexual dysfunction at BL, 58% of NB + CLI and 19% of UC participants no longer met dysfunction criteria at week 26. The most frequent adverse events leading to discontinuation before week 26 in NB + CLI included nausea (10.5%); anxiety (3.3%); and headache, hypertension, insomnia and palpitations (1.3% each). Conclusion Compared with UC, participants treated with NB + CLI experienced greater improvements in weight‐related quality of life, control over eating behaviour, and sexual function.
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Affiliation(s)
- A Halseth
- Orexigen Therapeutics, Inc.La Jolla CA USA
| | - K Shan
- Orexigen Therapeutics, Inc.La Jolla CA USA
| | - K Gilder
- Orexigen Therapeutics, Inc.La Jolla CA USA
| | - M Malone
- Orexigen Therapeutics, Inc.La Jolla CA USA
| | - L Acevedo
- Orexigen Therapeutics, Inc.La Jolla CA USA
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Tiessen RG, Kennedy CA, Keller BT, Levin N, Acevedo L, Gedulin B, van Vliet AA, Dorenbaum A, Palmer M. Safety, tolerability and pharmacodynamics of apical sodium-dependent bile acid transporter inhibition with volixibat in healthy adults and patients with type 2 diabetes mellitus: a randomised placebo-controlled trial. BMC Gastroenterol 2018; 18:3. [PMID: 29304731 PMCID: PMC5756385 DOI: 10.1186/s12876-017-0736-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 12/22/2017] [Indexed: 12/12/2022] Open
Abstract
Background Pathogenesis in non-alcoholic steatohepatitis (NASH) involves abnormal cholesterol metabolism and hepatic accumulation of toxic free cholesterol. Apical sodium-dependent bile acid transporter (ASBT) inhibition in the terminal ileum may facilitate removal of free cholesterol from the liver by reducing recirculation of bile acids (BAs) to the liver, thereby stimulating new BA synthesis from cholesterol. The aim of this phase 1 study in adult healthy volunteers (HVs) and patients with type 2 diabetes mellitus (T2DM) was to assess the safety, tolerability, pharmacokinetics and pharmacodynamics of ASBT inhibition with volixibat (SHP626; formerly LUM002). Methods Participants were randomised 3:1 to receive once-daily oral volixibat (0.5 mg, 1 mg, 5 mg or 10 mg) or placebo for 28 days in two cohorts (HV and T2DM). Assessments included safety, faecal BA and serum 7α-hydroxy-4-cholesten-3-one (C4; BA synthesis biomarker). Results Sixty-one individuals were randomised (HVs: placebo, n = 12; volixibat, n = 38; T2DM: placebo, n = 3; volixibat, n = 8). No deaths or treatment-related serious adverse events were reported. Mild or moderate gastrointestinal adverse events were those most frequently reported with volixibat. With volixibat, mean total faecal BA excretion on day 28 was ~1.6–3.2 times higher in HVs (643.73–1239.3 μmol/24 h) and ~8 times higher in T2DM (1786.0 μmol/24 h) than with placebo (HVs: 386.93 μmol/24 h; T2DM: 220.00 μmol/24 h). With volixibat, mean C4 concentrations increased by ~1.3–5.3-fold from baseline to day 28 in HVs and by twofold in T2DM. Conclusions Volixibat was generally well tolerated. Increased faecal BA excretion and serum C4 levels support the mechanistic rationale for exploring ASBT inhibition in NASH. The study was registered with the Dutch clinical trial authority (Centrale Commissie Mensgebonden Onderzoek; trial registration number NL44732.056.13; registered 24 May 2013). Electronic supplementary material The online version of this article (10.1186/s12876-017-0736-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Renger G Tiessen
- Early Development Services, Pharmaceutical Research Associates (PRA) Health Sciences, Van Swietenlaan 6, 9728 NZ Groningen, PO Box 8144, 9702, Groningen, KC, Netherlands.
| | - Ciara A Kennedy
- Lumena Pharmaceuticals Inc. (part of the Shire group of companies), 12531 High Bluff Drive, Suite 110, San Diego, CA, 92130, USA
| | - Bradley T Keller
- Lumena Pharmaceuticals Inc. (part of the Shire group of companies), 12531 High Bluff Drive, Suite 110, San Diego, CA, 92130, USA
| | - Nancy Levin
- Lumena Pharmaceuticals Inc. (part of the Shire group of companies), 12531 High Bluff Drive, Suite 110, San Diego, CA, 92130, USA
| | - Lisette Acevedo
- Lumena Pharmaceuticals Inc. (part of the Shire group of companies), 12531 High Bluff Drive, Suite 110, San Diego, CA, 92130, USA
| | - Bronislava Gedulin
- Lumena Pharmaceuticals Inc. (part of the Shire group of companies), 12531 High Bluff Drive, Suite 110, San Diego, CA, 92130, USA
| | - Andre A van Vliet
- Early Development Services, Pharmaceutical Research Associates (PRA) Health Sciences, Van Swietenlaan 6, 9728 NZ Groningen, PO Box 8144, 9702, Groningen, KC, Netherlands
| | - Alejandro Dorenbaum
- Lumena Pharmaceuticals Inc. (part of the Shire group of companies), 12531 High Bluff Drive, Suite 110, San Diego, CA, 92130, USA
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Bevilacqua J, Gonzalez-Quereda L, Castiglioni C, Zamorano I, Acevedo L, Díaz J, Rodríguez M, Trangulao A, Rivera M, Gallano P. Desminopathy in Chile, first cases reported. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hughes R, Matamala J, Barraza G, Campero M, Castillo J, Guiloff R, Acevedo L, Verdugo R, Cavada G, Orellana P, Orellana P, Wang Y, Honeyman J, Ramirez C, Rojas H, Sazunic I, Mullins E. Nerve Conduction Studies (NCS) in Patients with Central (CNS) and Peripheral (PNS) Nervous System Diseases with and without Neuropathic Pain (NP). J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.1282] [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: 11/26/2022]
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Brito Zeron P, Cajamarca L, Perez-Alvarez R, Real de Asua D, Benito Conejero S, Beamud F, Martinez-Valle F, Bosch X, Villaverde I, Fonseca E, Acevedo L, Gonzalez Vazquez L, de la Red G, Santiago C, Gonzalez Vazquez E, Inglada L, Robles Marhuenda A, Castro Salomo A, Jordana R, Fernandez Martin J, Perez de Lis M, Retamozo S, Gheitasi H, Lopez Soto A, Ramos-Casals M. THU0399 Systemic Amyloidosis as A Multi-Organ, Life-Threatening Disease: Predictive Baseline Factors Associated to Mortality in 570 Patients (Ramyd-Geas-Semi Registry). Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.5896] [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: 11/03/2022]
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Song RS, Carroll JM, Acevedo L, Wu D, Liu Y, Snyder EY. Generation, Expansion, and Differentiation of Human Induced Pluripotent Stem Cells (hiPSCs) Derived From the Umbilical Cords of Newborns. ACTA ACUST UNITED AC 2014; 29:1C.16.1-13. [DOI: 10.1002/9780470151808.sc01c16s29] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Richard S. Song
- Department of Pediatrics, University of California at San Diego and Rady Children's Hospital San Diego California
| | - Jeanne M. Carroll
- Department of Pediatrics, University of California at San Diego and Rady Children's Hospital San Diego California
| | - Lisette Acevedo
- Moores Cancer Center, University of California at San Diego La Jolla California
| | - Dongmei Wu
- Sanford‐Burnham Medical Research Institute La Jolla California
| | - Yang Liu
- Sanford‐Burnham Medical Research Institute La Jolla California
| | - Evan Y. Snyder
- Department of Pediatrics, University of California at San Diego and Rady Children's Hospital San Diego California
- Sanford‐Burnham Medical Research Institute La Jolla California
- Sanford Consortium for Regenerative Medicine La Jolla California
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Bernatchez PN, Acevedo L, Fernandez-Hernando C, Murata T, Chalouni C, Kim J, Erdjument-Bromage H, Shah V, Gratton JP, McNally EM, Tempst P, Sessa WC. Myoferlin regulates vascular endothelial growth factor receptor-2 stability and function. J Biol Chem 2007; 282:30745-53. [PMID: 17702744 DOI: 10.1074/jbc.m704798200] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [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: 11/06/2022] Open
Abstract
Myoferlin and dysferlin are members of the ferlin family of membrane proteins. Recent studies have shown that mutation or genetic disruption of myoferlin or dysferlin promotes muscular dystrophy-related phenotypes in mice, which are the result of impaired plasma membrane integrity. However, no biological functions have been ascribed to myoferlin in non-muscle tissues. Herein, using a proteomic analysis of endothelial cell (EC) caveolae/lipid raft microdomains we identified myoferlin in these domains and show that myoferlin is highly expressed in ECs and vascular tissues. The loss of myoferlin results in lack of proliferation, migration, and nitric oxide (NO) release in response to vascular endothelial growth factor (VEGF). Western blotting and surface biotinylation experiments show that loss of myoferlin reduces the expression level and autophosphorylation of VEGF receptor-2 (VEGFR-2) in native ECs. In a reconstituted cell system, transfection of myoferlin increases VEGFR-2 membrane expression and autophosphorylation in response to VEGF. In vivo, VEGFR-2 levels and VEGF-induced permeability are impaired in myoferlin-deficient mice. Mechanistically, myoferlin forms a complex with dynamin-2 and VEGFR-2, which prevents CBL-dependent VEGFR-2 polyubiquitination and proteasomal degradation. These data are the first to report novel biological activities for myoferlin and reveal the role of membrane integrity to VEGF signaling.
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Affiliation(s)
- Pascal N Bernatchez
- Department of Pharmacology and Vascular Biology & Transplantation Program, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, Connecticut 06536, USA
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Alavi AS, Acevedo L, Min W, Cheresh DA. Chemoresistance of Endothelial Cells Induced by Basic Fibroblast Growth Factor Depends on Raf-1–Mediated Inhibition of the Proapoptotic Kinase, ASK1. Cancer Res 2007; 67:2766-72. [PMID: 17363598 DOI: 10.1158/0008-5472.can-06-3648] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [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: 11/16/2022]
Abstract
Genotoxic stress induced by anticancer drugs can lead to apoptosis of both angiogenic endothelial cells (ECs) and proliferating tumor cells. However, growth factors such as basic fibroblast growth factor (bFGF) and vascular endothelial cell growth factor (VEGF) present within the tumor microenvironment can promote chemoresistance by suppressing apoptotic mechanisms in these cells. Here, we have identified apoptosis signal-regulating kinase 1 (ASK1), a proapoptotic member of the MAP3K family, as a target of bFGF-mediated survival signaling in ECs. Evidence is provided that ASK1 is required for EC apoptosis in response to the genotoxic chemotherapeutic agent doxorubicin, and that bFGF, but not VEGF, neutralizes the death-promoting activity of ASK1. Specifically, bFGF stimulation promotes the formation of a Raf-1/ASK1 complex at the mitochondria, inhibits ASK1 kinase activity, and protects ECs from genotoxic stress. Mutation of the Raf-1 activation domain (SS338/9AA) not only prevents Raf-1/ASK1 complex formation but abolishes bFGF-mediated EC protection from genotoxic stress. In line with these observations, bFGF, but not VEGF, neutralizes the antiangiogenic effects of doxorubicin in vivo. These findings reveal a new pathway of EC survival signaling and define a molecular mechanism for chemoresistance induced by bFGF.
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Affiliation(s)
- Alireza S Alavi
- Department of Pathology and Moores UCSD Cancer Center, University of California, San Diego, La Jolla, California 92093-0803, USA
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Fulton D, Babbitt R, Zoellner S, Fontana J, Acevedo L, McCabe TJ, Iwakiri Y, Sessa WC. Targeting of endothelial nitric-oxide synthase to the cytoplasmic face of the Golgi complex or plasma membrane regulates Akt- versus calcium-dependent mechanisms for nitric oxide release. J Biol Chem 2004; 279:30349-57. [PMID: 15136572 DOI: 10.1074/jbc.m402155200] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The heterogeneous localization of endothelial nitricoxide synthase (eNOS) on the Golgi complex versus the plasma membrane has made it difficult to dissect the regulation of each pool of enzyme. Here, we generated fusion proteins that specifically target the plasma membrane or cytoplasmic aspects of the Golgi complex and have assessed eNOS activation. Plasma membrane-targeted eNOS constructs were constitutively active, phosphorylated, and responsive to transmembrane calcium fluxes, yet were insensitive to further activation by Akt-mediated phosphorylation. In contrast, cis-Golgi complex-targeted eNOS behaved similarly to wild-type eNOS and was less sensitive to calcium-dependent activation and highly responsive to Akt-dependent phosphorylation compared with plasma membrane versions. In plasma membrane- and Golgi complex-targeted constructs, Ser1179 is critical for NO production. This study provides clear evidence for functional roles of plasma membrane- and Golgi complex-localized eNOS and supports the concept that proteins thought to be regulated and to function exclusively in the plasma membrane of cells can indeed signal and be regulated in internal Golgi membranes.
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Affiliation(s)
- David Fulton
- Department of Pharmacology and the Program in Vascular Cell Signaling and Therapeutics, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, Connecticut 06536-0812, USA
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Acevedo L, Yu J, Erdjument-Bromage H, Miao RQ, Kim JE, Fulton D, Tempst P, Strittmatter SM, Sessa WC. A new role for Nogo as a regulator of vascular remodeling. Nat Med 2004; 10:382-8. [PMID: 15034570 DOI: 10.1038/nm1020] [Citation(s) in RCA: 189] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2003] [Accepted: 03/02/2004] [Indexed: 11/08/2022]
Abstract
Although Nogo-A has been identified in the central nervous system as an inhibitor of axonal regeneration, the peripheral roles of Nogo isoforms remain virtually unknown. Here, using a proteomic analysis to identify proteins enriched in caveolae and/or lipid rafts (CEM/LR), we show that Nogo-B is highly expressed in cultured endothelial and smooth muscle cells, as well as in intact blood vessels. The N terminus of Nogo-B promotes the migration of endothelial cells but inhibits the migration of vascular smooth muscle (VSM) cells, processes necessary for vascular remodeling. Vascular injury in Nogo-A/B-deficient mice promotes exaggerated neointimal proliferation, and adenoviral-mediated gene transfer of Nogo-B rescues the abnormal vascular expansion in those knockout mice. Our discovery that Nogo-B is a regulator of vascular homeostasis and remodeling broadens the functional scope of this family of proteins.
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Affiliation(s)
- Lisette Acevedo
- Department of Pharmacology and Program in Vascular Cell Signaling and Therapeutics, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, Connecticut 06536, USA
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13
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Acevedo L, Mendoza C, Oyón R. [Total and fecal coliforms, some enterobacteria staphylococcus sp. and moulds in salads for hot dogs sold in Maracay, Venezuela]. Arch Latinoam Nutr 2001; 51:366-70. [PMID: 12012562] [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: 02/25/2023]
Abstract
Fast food sold on the streets are good vehicle to transmit gastrointestinal diseases to consumers because they are highly manipulated. The vegetables are a good media for pathogens growth. Raw vegetables salads for hot dog sold in Maracay were studied. Total and fecal Coliforms and Staphylococcus sp. were quantified by the Most Probable Number Technique, Coliforms and Staphylococcus isolated were partially identified. Also the mould population was quantified and identified. Microbial growth was correlated with pH and acidity measurements. MPN/g of Total Coliforms was 1.44 x 10(5) and 4.57 x 10(4) for fecal Coliforms. E. coli was no detected. 87 isolated from the Coliforms were partially identified as Citrobacter freundii variety 1 (45.09% of the isolated), C. freundii variety II (21.57%), Enterobacter aerogenes variety I (17.65%) and E. aerogenes variety II (15.69%); Staphylococcus sp. 3.93 x 10(6) MPN/g and all of its isolated (52) were coagulase negative. The mould population was 4.5 x 10(4) ufc/g, Penicillium sp., Aspergillus, sp., Fusarium sp. were partially identified. The salads presented a pH of 5.92 and an acidity of 0.78 ml of NaOH.
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Affiliation(s)
- L Acevedo
- Facultad de Agronomía, Universidad Central de Venezuela-Maracay, Venezuela
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Bucci M, Gratton JP, Rudic RD, Acevedo L, Roviezzo F, Cirino G, Sessa WC. In vivo delivery of the caveolin-1 scaffolding domain inhibits nitric oxide synthesis and reduces inflammation. Nat Med 2000; 6:1362-7. [PMID: 11100121 DOI: 10.1038/82176] [Citation(s) in RCA: 452] [Impact Index Per Article: 18.8] [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: 02/07/2023]
Abstract
Caveolin-1, the primary coat protein of caveolae, has been implicated as a regulator of signal transduction through binding of its "scaffolding domain" to key signaling molecules. However, the physiological importance of caveolin-1 in regulating signaling has been difficult to distinguish from its traditional functions in caveolae assembly, transcytosis, and cholesterol transport. To directly address the importance of the caveolin scaffolding domain in vivo, we generated a chimeric peptide with a cellular internalization sequence fused to the caveolin-1 scaffolding domain (amino acids 82-101). The chimeric peptide was efficiently taken up into blood vessels and endothelial cells, resulting in selective inhibition of acetylcholine (Ach)-induced vasodilation and nitric oxide (NO) production, respectively. More importantly, systemic administration of the peptide to mice suppressed acute inflammation and vascular leak to the same extent as a glucocorticoid or an endothelial nitric oxide synthase (eNOS) inhibitor. These data imply that the caveolin-1 scaffolding domain can selectively regulate signal transduction to eNOS in endothelial cells and that small-molecule mimicry of this domain may provide a new therapeutic approach.
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Affiliation(s)
- M Bucci
- Department of Pharmacology, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, Connecticut 06536, USA
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Acevedo L, Martínez E, Castañeda P, Franzblau S, Timmermann BN, Linares E, Bye R, Mata R. New phenylethanoids from Buddleja cordata subsp. cordata. Planta Med 2000; 66:257-261. [PMID: 10821053 DOI: 10.1055/s-2000-8570] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Bioassay-guided fractionation of a crude extract of the stem bark of Buddleja cordata subsp. cordata with significant antimycobacterial activity led to the isolation of a mixture composed by ten new long-chain esters of 2[4'-hydroxyphenyl]-ethanol (1-10), along with the lichen metabolites methyl beta-orcinolcarboxylate (11) and beta-orcinolcarboxylate (12). Extensive HPLC allowed the separation of the major components of the mixture, which were characterized by spectral means as 2[4'-hydroxyphenyl]-ethyl stearate (3), 2[4'-hydroxyphenyl]-ethyl behenate (6), and 2[4'-hydroxyphenyl]-ethyl lignocerate (8). The minor esters were identified as 2[4'-hydroxyphenyl]-ethyl palmitate (1), 2[4'-hydroxyphenyl]-ethyl heptadecanoate (2), 2[4'-hydroxyphenyl]-ethyl nonadecanoate (4), 2[4'-hydroxyphenyl]-ethyl arachidate (5), 2[4'-hydroxyphenyl]-ethyl tricosanoate (7), 2[4'-hydroxyphenyl]-ethyl pentacosanoate (9), and 2[4'-hydroxyphenyl]-ethyl hexacosanoate (10) by GC-MS analysis of the methyl esters derivatives of the fatty acids obtained by alkaline hydrolysis of the mixture. Compound 8 exhibited moderate antibacterial activity against Mycobacterium tuberculosis (MIC = 64 micrograms/ml).
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Affiliation(s)
- L Acevedo
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, D.F., México
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Cano-Canchola C, Acevedo L, Ponce-Noyola P, Flores-Martínez A, Flores-Carreón A, Leal-Morales CA. Induction of lytic enzymes by the interaction of Ustilago maydis with Zea mays tissues. Fungal Genet Biol 2000; 29:145-51. [PMID: 10882531 DOI: 10.1006/fgbi.2000.1196] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The nonpathogenic (FB-2) and pathogenic (FB-D12) strains of Ustilago maydis were grown in medium supplemented with different carbon sources including monosaccharides, polysaccharides, and plant tissues. Both strains were able to grow on all substrates, with doubling times varying from 2 to 25 h depending on the carbon source. Plant tissues supplied as carbon source induced lytic enzymes differentially; pectate lyase and cellulase activities were induced preferentially by apical stem meristem in strain FB-D12, whereas leaves preferentially induced xylanase and cellulase activities in strain FB2. Stems induced polygalacturonase activity in both strains. All enzyme activities, except cellulase in the FB-D12 strain, were detected at a low level when U. maydis was grown on glucose. In planta, chlorosis and production of teliospores were paralleled by an increase in pectate lyase activity. Anthocyanin production and formation of galls and teliospores correlated with polygalacturonase expression whereas cellulase activity increased only during the stage of anthocyanin production and gall formation. Expression of xylanase activity coincided with the last stage of teliospore formation.
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Affiliation(s)
- C Cano-Canchola
- Instituto de Investigación en Biología Experimental (IIBE), Universidad de Guanajuato, Guanajuato, México
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17
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Mata R, Rojas A, Acevedo L, Estrada S, Calzada F, Rojas I, Bye R, Linares E. Smooth muscle relaxing flavonoids and terpenoids from Conyza filaginoides. Planta Med 1997; 63:31-35. [PMID: 9063094 DOI: 10.1055/s-2006-957598] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Activity-guided fractionation of the smooth muscle relaxing, chloroform-methanol (1:1) extract of Conyza filaginoides (D.C.) Hieron (Asteraceae) led to the isolation of three flavonoids (quercetin 3-glucoside, rutin, and pinostrobin), one sterol (alpha-spinasterol), a sesquiterpenoid (beta-caryophyllene 4,5-alpha-oxide), and two triterpenoids (erythrodiol and 3-beta-tridecanoyloxy-28-hydroxyolean-12-ene). 3-beta-Tridecanoyloxy-28-hydroxy-olean-12-ene is a new naturally occurring terpenoid. All the isolated compounds induced a concentration-dependent inhibition of the spontaneous contractions of rat ileum. The spasmolytic activity exhibited by the extract and active principles tends to support the traditional use of C filaginoides as an antispasmodic agent.
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Affiliation(s)
- R Mata
- Departamento de Farmacia, Facultad de Química and Unidad de Investigación en Plantas Medicinales, Instituto de Química, México D.F
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18
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Baró M, Acevedo L, Lagos ME. [Usefulness of adenosine deaminase determination in cerebrospinal fluid for the diagnosis of meningeal tuberculosis: 4 years experience at a public hospital]. Rev Med Chil 1996; 124:319-26. [PMID: 9008944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The aim of this work was to study the usefulness of CSF adenosine deaminase determination in the diagnosis of tuberculous meningitis and determine if the proposed cutoff value of 7.1 i.u./ml had the better sensitivity and specificity. We retrospectively studied 148 patients, 12 with tuberculous meningitis and 136 with other central nervous system diseases. Adenosine deaminase values ranged from 3.6 to 31.2 i.u./ml in patients with tuberculous meningitis and from 0.1 to 312 i.u./ml in controls. The best sensitivity/specificity ratio (83.3 and 85.3% respectively) was obtained using a cutoff value of 6.5 i.u./ml. It is concluded that CSF adenosine deaminase values are useful in the diagnosis of tuberculous meningitis and that the cutoff value should be lowered to 6.5 i.u./ml to improve its diagnostic yield.
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Affiliation(s)
- M Baró
- Servicio de Medicina Interna, Hospital Base Puerto Montt. Chile
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19
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Koehler NR, Bodanese LC, Acevedo L, Rabin M, Stein R. [Etiology of left bundle branch block in Porto Alegre]. Arq Bras Cardiol 1995; 65:139-42. [PMID: 8554489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
PURPOSE To determine the type of cardiac disease causing left bundle branch block (LBBB) in Porto Alegre, Brazil, and to assess the role of associated left axis deviation (-30 degrees or more in the frontal plane) in order to identify a specific etiology of LBBB. METHODS Through reports from the assistant physicians or through examination of the patients, the underlying heart disease in 264 cases of LBBB was assessed. The chi-square test was used to determine a possible association between left anterior hemiblock LBBB and one or more specific type of underlying heart disease. RESULTS Systemic arterial hypertension (30.7%), ischemic heart disease (30.3%), valvar heart disease (8.7%), cardiomyopathies (7.5%), idiopathic degenerative disease of the conduction system (1.6%) and miscellaneous heart diseases (1.2%) were the underlying heart diseases. The presence of LBBB did not indicate any specific type of cardiac disease. CONCLUSION The causes of LBBB in Porto Alegre are the same as reported in the international medical literature. Upward and leftward deviation (> or = -30 degrees) of QRS axis in the frontal plane did not show statistical significant association with any type of underlying cardiac disease.
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Affiliation(s)
- N R Koehler
- Hospital São Lucas e Faculdade de Medicina da PUC/RS, Porto Alegre
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Gómez G, Melgarejo E, Narváez J, Gamarra G, Restrepo G, Acevedo L, Izurieta A. Multicenter evaluation of efficacy, tolerability and safety of a new first-line antihypertensive drug, isradipine, in a Latin-American population. Am J Hypertens 1991; 4:128S-130S. [PMID: 1827002 DOI: 10.1093/ajh/4.2.128s] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Isradipine, a new antihypertensive dihydropyridine calcium antagonist, was evaluated for its efficacy, tolerability, and safety in 91 ambulatory patients who had mild-to-moderate hypertension. The design of the present study included a two-week wash-out period after confirmation of disease, followed by 12 weeks of active treatment with 2.5 mg isradipine twice daily. Patients were switched from other antihypertensive drugs, mainly diuretics and beta-blockers. The dose of isradipine remained virtually unchanged throughout the study and resulted in a mean decrease of 22 mm Hg in systolic blood pressure (SBP) (P less than .00001) and 19 mm Hg in diastolic blood pressure (DBP) (P less than .00001). Heart rate was unchanged (difference of -1 beats/min), as was the mean body weight of the study patients. Isradipine was generally well tolerated. Side effects were few and, when present, tended to diminish and eventually disappear during the treatment period. All of the clinical laboratory parameters tested and electrocardiograph intervals remained unchanged. In conclusion, these results indicate that isradipine is a novel drug which is highly effective and well tolerated in the treatment of mild to moderate hypertension in this group of patients.
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Affiliation(s)
- G Gómez
- Hemodynamic Section, Central Military Hospital, Bogotá, Colombia
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de Andino RM, Conde JG, Mendoza M, Acevedo L, Santana J, Félix LA, Machuca M, Anzola Pérez E. [The aging person in Gurabo: a bio-psychosocial profile of the aging person in a community in Puerto Rico]. Bol Asoc Med P R 1989; 81:345-50. [PMID: 2818775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The Department of Family Medicine of the University of Puerto Rico Medicine School performed a census of the inhabitants 60 years and older in the community of Gurabo. A total of 1,890 elderly were interviewed 51% were female and 49% male. Sixty percent were married and twenty-five percent were widowed. Eighty two percent still lived within a family setting and only seventeen percent lived alone 86% owned their own home despite ninety percent reporting incomes below $400.00 per month. Ninety five percent have access to medical services but 63% receive services in multiples sites. Eighteen percent were functionally impaired, fourteen percent intellectually impaired and five percent had impairment in both areas. Preliminary data show that the latter group had an annual mortality rate of 15% compared to only 3.6% and 1.3% respectively in the other two group. We concluded that: 1) functional and mental impairment are indicators of increased mortality. 2) although access to health care is not a problem this health care is episodic and interrupted being provided in multiple different sites.
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Mossmann RA, Blacher C, Koehler N, Guaragna JC, Sukienik B, De Abreu Filho P, Bodanese LC, Grillo J, Goldani MA, Acevedo L. [Mitral valvoplasty with a balloon catheter: initial experience with a new technic]. Arq Bras Cardiol 1987; 49:333-7. [PMID: 3454157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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