1
|
Ladbury CJ, Sanchez JF, Chowdhury A, Palmer J, Liu A, Stein A, Htut M, Farol L, Cai JL, Somlo G, Rosenzweig M, Wong JYC, Sahebi F. Phase I Study of Bortezomib, Fludarabine, and Melphalan, with or without Total Marrow Irradiation as Conditioning for Allogeneic Hematopoietic Stem Cell Transplantation in Patients with High-Risk or Relapsed/Refractory Multiple Myeloma. Int J Radiat Oncol Biol Phys 2023; 117:S107-S108. [PMID: 37784283 DOI: 10.1016/j.ijrobp.2023.06.069] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Though outcomes of patients with multiple myeloma (MM) have improved, cure remains elusive. Allogeneic hematopoietic stem cell transplantation (allo-sCT) is associated with a lower relapse rate, but its role is hindered due to toxicities. We hypothesized that targeted total body irradiation in the form of total marrow irradiation (TMI) could safely facilitate allo-SCT via an improved toxicity profile. Therefore, we conducted a phase I study to investigate the safety and feasibility of a bortezomib (BTZ), fludarabine (FLU), and melphalan (MEL), with or without TMI, prior to allo-SCT for patients with high-risk (HR) or relapsed/refractory (R/R) MM. MATERIALS/METHODS Between 2012 and 2018 this study enrolled patients with HR or R/R MM on one of two strata, each comprising BTZ dose-escalation cohorts. Patients aged 18-60 with no prior radiation (RT) received TMI at 900 cGy (in 6 fractions delivered twice-daily), FLU, and MEL conditioning, with BTZ added in the second cohort (stratum I). Patients aged 18-70 with prior RT received FLU, MEL, and BTZ, without TMI (stratum II). The primary endpoint was feasibility of escalating doses of BTZ, with or without TMI, defined using a 3+3 design. Dose-limiting toxicity (DLT) was defined as any Grade 3+ Bearman toxicity or prolonged CTCAE v4.0 Grade 4+ neutropenia. Secondary endpoints included treatment response, time to neutrophil and platelet engraftment, incidence of acute (a) and chronic (c) graft-versus-host disease (GVHD), progression-free-survival (PFS), and overall survival (OS). RESULTS Eight patients were enrolled on stratum I. One of three patients in the first cohort of stratum I experienced DLT, which led to expansion to three more patients with no DLT. Cohort 2 enrolled only 2 patients due to low accrual, with BTZ added at 0.5 mg/m2; neither experienced DLT. Nine patients were enrolled on stratum II. Three patients were enrolled on cohort 1 (BTZ 0.5 mg/m2) and none experienced DLT. Three were enrolled on cohort 2 (bortezomib 0.7 mg/m2), and one experienced DLT. Therefore, the cohort expanded to three more patients. One more patient experienced DLT and 0.5 mg/m2 was considered the maximum tolerated dose. There were no primary or secondary graft failures. Complete response was achieved in 7 and 4 patients in strata I and II, respectively. Median follow-up for all patients was 30.7 months (mos) and was 99.8 mos for surviving patients. Median overall survival (OS) on strata I and II were 44.5 mos and 21.6 mos, respectively. Median PFS on strata I and II were 18.1 mos and 8.9 mos, respectively. In strata I, 5 patients developed Grade 2+ aGVHD and 8 developed extensive cGVHD. In strata II, 4 patients developed Grade 2+ aGVHD and 6 developed extensive cGVHD. CONCLUSION The TMI 900 cGy, FLU, and MEL conditioning regimen is considered safe as conditioning for allo-SCT and may warrant further investigation due to favorable response rates and survival; the conditioning regimen of FLU, MEL, and BTZ (0.7 mg/m2) is associated with unacceptable toxicities.
Collapse
Affiliation(s)
- C J Ladbury
- Department of Radiation Oncology, City of Hope National Medical Center, Duarte, CA
| | - J F Sanchez
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| | - A Chowdhury
- Division of Biostatistics, City of Hope National Medical Center, Duarte, CA
| | - J Palmer
- Division of Biostatistics, City of Hope National Medical Center, Duarte, CA
| | - A Liu
- Department of Radiation Oncology, City of Hope National Medical Center, Duarte, CA
| | - A Stein
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| | - M Htut
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| | - L Farol
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| | - J L Cai
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| | - G Somlo
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| | - M Rosenzweig
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| | - J Y C Wong
- Department of Radiation Oncology, City of Hope National Medical Center, Duarte, CA
| | - F Sahebi
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
| |
Collapse
|
2
|
García-Marcos L, Chiang CY, Asher MI, Marks GB, El Sony A, Masekela R, Bissell K, Ellwood E, Ellwood P, Pearce N, Strachan DP, Mortimer K, Morales E, Ajeagah GA, Alkhayer G, Alomary SA, Ambriz-Moreno MJ, Arias-Cruz A, Awasthi S, Badellino H, Behniafard N, Bercedo-Sanz A, Brożek G, Bucaliu-Ismajli I, Cabrera-Aguilar A, Chinratanapisit S, Del-Río-Navarro BE, Douros K, El Sadig H, Escalante-Dominguez AJ, Falade AG, Gacaferri-Lumezi B, García-Almaráz R, Garcia-Muñoz R, Ghashi V, Ghoshal AG, González-Díaz C, Hana-Lleshi L, Hernández-Mondragón LO, Huang JL, Jiménez-González CA, Juan-Pineda MÁ, Kochar SK, Kuzmicheva K, Linares-Zapien FJ, Lokaj-Berisha V, López-Silvarrey A, Lozano-Sáenz JS, Mahesh PA, Mallol J, Martinez-Torres AE, Masekela R, Mérida-Palacio JV, Mohammad Y, Moreno-Gardea HL, Navarrete-Rodriguez EM, Ndikum AE, Noor M, Ochoa-Lopez G, Pajaziti L, Pellegrini-Belinchon J, Perez-Fernández V, Priftis K, Ramos-García BC, Ranasinghe JC, Robertson S, Rodriguez-Perez N, Rutter CE, Sacre-Hazouri JA, Salvi S, Sanchez JF, Sánchez JF, Sanchez-Coronel MG, Saucedo-Ramirez OJ, Singh M, Singh N, Singh V, Sinha S, Sit N, Sosa-Ferrari SM, Soto-Martínez ME, Urrutia-Pereira M, Yeh KW, Zar HJ, Zhjeqi V. Asthma management and control in children, adolescents, and adults in 25 countries: a Global Asthma Network Phase I cross-sectional study. Lancet Glob Health 2023; 11:e218-e228. [PMID: 36669806 PMCID: PMC9885426 DOI: 10.1016/s2214-109x(22)00506-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 11/02/2022] [Accepted: 11/09/2022] [Indexed: 01/20/2023]
Abstract
BACKGROUND Asthma is one of the most common non-communicable diseases globally. This study aimed to assess asthma medicine use, management plan availability, and disease control in childhood, adolescence, and adulthood across different country settings. METHODS We used data from the Global Asthma Network Phase I cross-sectional epidemiological study (2015-20). A validated, written questionnaire was distributed via schools to three age groups (children, 6-7 years; adolescents, 13-14 years; and adults, ≥19 years). Eligible adults were the parents or guardians of children and adolescents included in the surveys. In individuals with asthma diagnosed by a doctor, we collated responses on past-year asthma medicines use (type of inhaled or oral medicine, and frequency of use). Questions on asthma symptoms and health visits were used to define past-year symptom severity and extent of asthma control. Income categories for countries based on gross national income per capita followed the 2020 World Bank classification. Proportions (and 95% CI clustered by centre) were used to describe results. Generalised structural equation multilevel models were used to assess factors associated with receiving medicines and having poorly controlled asthma in each age group. FINDINGS Overall, 453 473 individuals from 63 centres in 25 countries were included, comprising 101 777 children (6445 [6·3%] with asthma diagnosed by a doctor), 157 784 adolescents (12 532 [7·9%]), and 193 912 adults (6677 [3·4%]). Use of asthma medicines varied by symptom severity and country income category. The most used medicines in the previous year were inhaled short-acting β2 agonists (SABA; range across age groups, 29·3-85·3% participants) and inhaled corticosteroids (12·6-51·9%). The proportion of individuals with severe asthma symptoms not taking inhaled corticosteroids (inhaled corticosteroids alone or with long-acting β2 agonists) was high in all age groups (934 [44·8%] of 2085 children, 2011 [60·1%] of 3345 adolescents, and 1142 [55·5%] of 2058 adults), and was significantly higher in middle-to-low-income countries. Oral SABA and theophylline were used across age groups and country income categories, contrary to current guidelines. Asthma management plans were used by 4049 (62·8%) children, 6694 (53·4%) adolescents, and 3168 (47·4%) adults; and 2840 (44·1%) children, 6942 (55·4%) adolescents, and 4081 (61·1%) adults had well controlled asthma. Independently of country income and asthma severity, having an asthma management plan was significantly associated with the use of any type of inhaled medicine (adjusted odds ratio [OR] 2·75 [95% CI 2·40-3·15] for children; 2·45 [2·25-2·67] for adolescents; and 2·75 [2·38-3·16] for adults) or any type of oral medicine (1·86 [1·63-2·12] for children; 1·53 [1·40-1·68] for adolescents; and 1·78 [1·55-2·04] for adults). Poor asthma control was associated with low country income (lower-middle-income and low-income countries vs high-income countries, adjusted OR 2·33 [95% CI 1·32-4·14] for children; 3·46 [1·83-6·54] for adolescents; and 4·86 [2·55-9·26] for adults). INTERPRETATION Asthma management and control is frequently inadequate, particularly in low-resource settings. Strategies should be implemented to improve adherence to asthma treatment guidelines worldwide, with emphasis on access to affordable and quality-assured essential asthma medicines especially in low-income and middle-income countries. FUNDING International Union Against Tuberculosis and Lung Disease, Boehringer Ingelheim New Zealand, AstraZeneca, UK National Institute for Health Research, UK Medical Research Council, European Research Council, the Spanish Instituto de Salud Carlos III. TRANSLATION For the Spanish translation of the abstract see Supplementary Materials section.
Collapse
Affiliation(s)
- Luis García-Marcos
- Paediatric Allergy and Pulmonology Units, Virgen de la Arrixaca University Children‘s Hospital, University of Murcia and IMIB Bio-medical Research Institute, Murcia, Spain,ARADyAL Allergy Network, Murcia, Spain,Correspondence to: Prof Luis García-Marcos, Paediatric Allergy and Pulmonology Units, Virgen de la Arrixaca University Children‘s Hospital, University of Murcia and IMIB Bio-medical Research Institute, 30120 Murcia, Spain
| | - Chen-Yuan Chiang
- International Union Against Tuberculosis and Lung Disease, Paris, France,Division of Pulmonary Medicine, Department of Internal Medicine, Wan Fang Hospital, and Division of Pulmonary Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - M Innes Asher
- Department of Paediatrics: Child and Youth Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Guy B Marks
- Respiratory and Environmental Epidemiology, University of New South Wales, Sydney, NSW, Australia
| | - Asma El Sony
- Epidemiological Laboratory for Public Health, Research and Development, Khartoum, Sudan
| | - Refiloe Masekela
- Inkosi Albert Luthuli Central Hospital, College of Health Sciences, School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa,Department of Paediatrics and Child Health, College of Health Sciences, School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa
| | - Karen Bissell
- School of Population Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Eamon Ellwood
- Department of Paediatrics: Child and Youth Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Philippa Ellwood
- Department of Paediatrics: Child and Youth Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Neil Pearce
- Department of Medical Statistics, London School of Hygiene & Tropical Medicine, London, UK
| | - David P Strachan
- Population Health Research Institute, St George's, University of London, London, UK
| | - Kevin Mortimer
- Department of Paediatrics and Child Health, College of Health Sciences, School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa,Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK,Respiratory Medicine, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK,Department of Medicine, University of Cambridge, Cambridge, UK
| | - Eva Morales
- Department of Public Health Sciences, University of Murcia and IMIB Bio-medical Research Institute, Murcia, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Bernabe-Ortiz A, Sanchez JF, Carrillo-Larco RM, Gilman RH, Poterico JA, Quispe R, Smeeth L, Miranda JJ. Rural-to-urban migration and risk of hypertension: longitudinal results of the PERU MIGRANT study. J Hum Hypertens 2017; 31:22-28. [PMID: 26865219 PMCID: PMC4981561 DOI: 10.1038/jhh.2015.124] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/10/2015] [Accepted: 11/23/2015] [Indexed: 11/09/2022]
Abstract
Urbanization can be detrimental to health in populations due to changes in dietary and physical activity patterns. The aim of this study was to determine the effect of migration on the incidence of hypertension. Participants of the PERU MIGRANT study, that is, rural, urban and rural-to-urban migrants, were re-evaluated after 5 years after baseline assessment. The outcome was incidence of hypertension; and the exposures were study group and other well-known risk factors. Incidence rates, relative risks (RRs) and population attributable fractions (PAFs) were calculated. At baseline, 201 (20.4%), 589 (59.5%) and 199 (20.1%) participants were rural, rural-to-urban migrant and urban subjects, respectively. Overall mean age was 47.9 (s.d.±12.0) years, and 522 (52.9%) were female. Hypertension prevalence at baseline was 16.0% (95% confidence interval (CI) 13.7-18.3), being more common in urban group; whereas pre-hypertension was more prevalent in rural participants (P<0.001). Follow-up rate at 5 years was 94%, 895 participants were re-assessed and 33 (3.3%) deaths were recorded. Overall incidence of hypertension was 1.73 (95%CI 1.36-2.20) per 100 person-years. In multivariable model and compared with the urban group, rural group had a greater risk of developing hypertension (RR 3.58; 95%CI 1.42-9.06). PAFs showed high waist circumference as the leading risk factor for the hypertension development in rural (19.1%), migrant (27.9%) and urban (45.8%) participants. Subjects from rural areas are at higher risk of developing hypertension relative to rural-urban migrant or urban groups. Central obesity was the leading risk factor for hypertension incidence in the three population groups.
Collapse
Affiliation(s)
- A Bernabe-Ortiz
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru,Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - J F Sanchez
- US Naval Medical Research Unit No. 6 (NAMRU-6), Lima, Peru
| | - R M Carrillo-Larco
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - R H Gilman
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru,Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - J A Poterico
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - R Quispe
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - L Smeeth
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - J J Miranda
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru,Department of Medicine, School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru,CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Av. Armendariz 497, Miraflores, Lima 18, Peru. E-mail:
| |
Collapse
|
4
|
Cadena J, Levine DJ, Angel LF, Maxwell PR, Brady R, Sanchez JF, Michalek JE, Levine SM, Restrepo MI. Antifungal prophylaxis with voriconazole or itraconazole in lung transplant recipients: hepatotoxicity and effectiveness. Am J Transplant 2009; 9:2085-91. [PMID: 19645709 DOI: 10.1111/j.1600-6143.2009.02734.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Invasive fungal infections (IFI) are common after lung transplantation and there are limited data for the use of antifungal prophylaxis in these patients. Our aim was to compare the safety and describe the effectiveness of universal prophylaxis with two azole regimens in lung transplant recipients. This is a retrospective study in lung transplant recipients from July 2003 to July 2006 who received antifungal prophylaxis with itraconazole or voriconazole plus inhaled amphotericin B to compare the incidence of hepatotoxicity. Secondary outcomes include describing the incidence of IFI, clinical outcomes after IFI and mortality. Sixty-seven consecutive lung transplants received antifungal prophylaxis, 32 itraconazole and 35 voriconazole and inhaled amphotericin B. There were no significant differences between groups in the acute physiology and chronic health evaluation (APACHE) score at the time of transplantation, demographic characteristics, comorbidities and concomitant use of hepatotoxic medications. Hepatotoxicity occurred in 12 patients receiving voriconazole and inhaled amphotericin B and in no patients receiving itraconazole (p < 0.001). There was no significant difference between groups with regard to the percentage of transplants with IFI, but one case of zygomycosis occurred in a transplant treated with voriconazole. Voriconazole prophylaxis after lung transplantation was associated with a higher incidence of hepatotoxicity and similar clinical effectiveness when compared to itraconazole.
Collapse
Affiliation(s)
- J Cadena
- Division of Infectious Diseases, Department of Medicine, The University of Texas Health Science Center at San Antonio (UTHSCSA), TX, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Harvey BK, Chen GJ, Schoen CJ, Lee CT, Howard DB, Dillon-Carter O, Coggiano M, Freed WJ, Wang Y, Hoffer BJ, Sanchez JF. An immortalized rat ventral mesencephalic cell line, RTC4, is protective in a rodent model of stroke. Cell Transplant 2007; 16:483-91. [PMID: 17708338 PMCID: PMC2494860 DOI: 10.3727/000000007783464984] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/24/2022] Open
Abstract
One therapeutic approach to stroke is the transplantation of cells capable of trophic support, reinnervation, and/or regeneration. Previously, we have described the use of novel truncated isoforms of SV40 large T antigen to generate unique cell lines from several primary rodent tissue types. Here we describe the generation of two cell lines, RTC3 and RTC4, derived from primary mesencephalic tissue using a fragment of mutant T antigen, T155c (cDNA) expressed from the RSV promoter. Both lines expressed the glial markers vimentin and S100beta, but not the neuronal markers NeuN, MAP2, or beta-III-tubulin. A screen for secreted trophic factors revealed substantially elevated levels of platelet-derived growth factor (PDGF) in RTC4, but not RTC3 cells. When transplanted into rat cortex, RTC4 cells survived for at least 22 days and expressed PDGF. Because PDGF has been reported to reduce ischemic injury, we examined the protective functions of RTC4 cells in an animal model of stroke. RTC4 or RTC3 cells, or vehicle, were injected into rat cortex 15-20 min prior to a 60-min middle cerebral artery ligation. Forty-eight hours later, animals were sacrificed and the stroke volume was assessed by triphenyl-tetrazolium chloride (TTC) staining. Compared to vehicle or RTC3 cells, transplanted RTC4 cells significantly reduced stroke volume. Overall, we generated a cell line with glial properties that produces PDGF and reduces ischemic injury in a rat model of stroke.
Collapse
Affiliation(s)
- B K Harvey
- Molecular Neuropsychiatry Research Branch, National Institute on Drug Abuse, National Institutes of Health (NIH), Baltimore, MD 21224, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Abstract
The vanilloid (capsaicin) receptor, VR1, is expressed in dorsal root ganglion and mediates the sensory response to vanilloids and other noxious stimuli. There is evidence for VR1 expression in CNS regions as well, but its function in these tissues is unknown. The identification of a rat VR1 5' splice variant and the rat stretch inhibitable channel, which are also expressed in dorsal root ganglia and CNS, raises the possibility that these and/or other VR1 variants may regulate VR1 activity. We have used a quantitative ribonuclease protection assay to characterize the central and peripheral expression of VR1 and VR1 variant RNA in the rat. The data confirm that VR1 is widely expressed in CNS, with highest RNA levels found in cerebral cortex, hippocampus, and cerebellum. VR1 RNA expression in dorsal root ganglia is approximately 28 times greater than in any other tissue sample studied. VR1 5' splice variant RNA is expressed at levels 12 times lower than VR1 in dorsal root ganglia, but at similar levels to VR1 in all other tissues examined. A VR1-related RNA expressed at high levels in kidney was detected, and was distinct from VR1 or stretch inhibitable channel. Our results also show that peripheral inflammation does not change VR1 RNA levels in rat dorsal root ganglia. Systemic resiniferatoxin administration, however, decreases VR1 expression in dorsal root ganglia by 65-80%, an effect that persists for at least 2 months. This study demonstrates that VR1 is expressed at high levels in dorsal root ganglia relative to other tissues and that VR1 5' splice variant is expressed at low levels in dorsal root ganglia compared to VR1. VR1 gene expression in dorsal root ganglia is regulated in response to systemic resiniferatoxin but not peripheral inflammation.
Collapse
Affiliation(s)
- J F Sanchez
- Department of Biochemistry and Molecular Biology, Neurogen Corporation, 35 N.E. Industrial Road, Branford, CT 06405, USA
| | | | | |
Collapse
|
7
|
Sanchez JF, Hoh F, Strub MP, Strub JM, Van Dorsselaer A, Lehrer R, Ganz T, Chavanieu A, Calas B, Dumas C, Aumelas A. Expression, purification, crystallization and preliminary X-ray analysis of the cathelicidin motif of the protegrin-3 precursor. Acta Crystallogr D Biol Crystallogr 2001; 57:1677-9. [PMID: 11679742 DOI: 10.1107/s0907444901012598] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Received: 05/10/2001] [Accepted: 07/24/2001] [Indexed: 11/10/2022]
Abstract
Numerous precursors of antibacterial peptides with unrelated sequences share a similar prosequence which belongs to the cathelicidin family of proteins. The three-dimensional structure of this cathelicidin motif, which contains two disulfide bonds, has not yet been reported. The cathelicidin motif (ProS) of the protegrin-3 precursor was overexpressed in Escherichia coli as a His-tagged protein. The His(6) tag was removed by thrombin cleavage. ProS was purified to homogeneity and single crystals were obtained by the hanging-drop vapour-diffusion method at pH 3-4. Preliminary X-ray diffraction analysis indicated that these crystals belong to the hexagonal space group P6(1)22 or P6(5)22, with unit-cell parameters a = b = 51.42, c = 134.25 A. These crystals diffracted beyond 2.75 A (1.9 A at ESRF) and contain one molecule per asymmetric unit.
Collapse
Affiliation(s)
- J F Sanchez
- Centre de Biochimie Structurale, UMR 5048 CNRS-UM1/UMR 554 INSERM-UM1, Université Montpellier 1, Faculté de Pharmacie, 15 Avenue Charles Flahault, 34060 Montpellier CEDEX 2, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Ramirez SH, Sanchez JF, Dimitri CA, Gelbard HA, Dewhurst S, Maggirwar SB. Neurotrophins prevent HIV Tat-induced neuronal apoptosis via a nuclear factor-kappaB (NF-kappaB)-dependent mechanism. J Neurochem 2001; 78:874-89. [PMID: 11520908 DOI: 10.1046/j.1471-4159.2001.00467.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [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: 11/20/2022]
Abstract
HIV-1 associated dementia is thought to be caused by neuronal damage and death in response to the production of soluble neurotoxic factors by virally infected mononuclear phagocytes. These neurotoxins include HIV-1 Tat. The ability of neurotrophins to promote cell survival prompted us to examine whether neurotrophins might also be capable of opposing the pro-apoptotic effects of Tat. Here, we show that Tat-induced neuronal apoptosis in primary cultures of rat cerebellar granule cells and in neuronally differentiated human SK-N-MC cells is profoundly inhibited by brain-derived neurotrophic factor, nerve growth factor and activity-dependent neurotrophic factor nonamer peptide. These neurotrophins activated the transcription factor NF-kappaB, and inhibition of NF-kappaB activation using a super-repressor IkappaB-alpha mutant was found to block the survival-promoting activity of the neurotrophins. Reporter gene assays and immunoblot experiments revealed that the neurotrophins also up-regulated the expression of Bcl-2, at both the transcriptional and protein levels. Overexpression of the super-repressor IkappaB-alpha mutant prevented this induction of Bcl-2 expression. Moreover, overexpression of either Bcl-2, alone, or the RelA subunit of NF-kappaB, alone, protected neurons from Tat-induced apoptosis. These findings suggest that the activation of NF-kappaB by neurotrophic factors may promote survival of neurons exposed to Tat, via regulation of anti-apoptotic genes including Bcl-2.
Collapse
Affiliation(s)
- S H Ramirez
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, USA
| | | | | | | | | | | |
Collapse
|
9
|
Tong N, Sanchez JF, Maggirwar SB, Ramirez SH, Guo H, Dewhurst S, Gelbard HA. Activation of glycogen synthase kinase 3 beta (GSK-3beta) by platelet activating factor mediates migration and cell death in cerebellar granule neurons. Eur J Neurosci 2001; 13:1913-22. [PMID: 11403684 DOI: 10.1046/j.0953-816x.2001.01572.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Children with vertically acquired HIV-1 can present with a rapidly progressive encephalopathy and neuronal apoptosis in the first 12-18 months of life. Furthermore, abnormal prenatal platelet activating factor (PAF) signalling may result in lissencephaly, a disorder of neuronal migration. PAF, produced from human immunodeficiency virus type 1 (HIV-1) -infected brain-resident macrophages, induces neuronal apoptosis in cultured cerebellar granule neurons (CGNs) in part by activating glycogen synthase kinase 3 beta (GSK-3beta). However, PAF can also inhibit migration of CGNs that are dispersed and allowed to reaggregate. Therefore, we investigated the biological effects following activation of GSK-3beta by PAF, and whether these effects were dependent on the culture conditions of the CGNs. We show here that activation of neuronal GSK-3beta by PAF is receptor-specific, with similar kinetics of activation in both monolayer cultures of CGNs that have ceased to migrate and reaggregate cultures of CGNs that are actively migrating. However, PAF receptor activation in reaggregated CGNs inhibits neuronal migration and induces approximately half the level of neuronal apoptosis compared with PAF-treated CGN cultures that have ceased to migrate. PAF-mediated inhibition of neuronal migration in reaggregated CGNs or induction of apoptosis in CGNs that have ceased to migrate can be reversed by either PAF receptor antagonists, or the GSK-3beta inhibitors lithium or valproic acid, in a dose-dependent manner. Abnormal PAF signalling that results in GSK-3beta overactivation may represent a common mechanism for pathological defects in neuronal migration in the prenatal period and neuronal apoptosis in the postnatal period.
Collapse
Affiliation(s)
- N Tong
- Center for Ageing and Developmental Biology, Aab Biomedical Institute, University of Rochester Medical Center, Box 645, 601 Elmwood Avenue, Rochester, NY 14642, USA
| | | | | | | | | | | | | |
Collapse
|
10
|
Cortright DN, Crandall M, Sanchez JF, Zou T, Krause JE, White G. The tissue distribution and functional characterization of human VR1. Biochem Biophys Res Commun 2001; 281:1183-9. [PMID: 11243859 DOI: 10.1006/bbrc.2001.4482] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The irritant action of capsaicin is mediated by the vanilloid receptor, VR1, which is expressed in sensory neurons termed nociceptors. Capsaicin also desensitizes nociceptors and, thus, is useful clinically as an analgesic. Given the potential importance of VR1 in pain, we have cloned the human capsaicin receptor, hVR1, from a human dorsal root ganglia (DRG) cDNA library. Human VR1 protein is 85% identical to the rat VR1 and many of the amino acid differences are concentrated at the amino and carboxyl termini. VR1 is expressed in DRG as an approximately 4.2 kilobase RNA, and is also expressed in the central nervous system and in the kidney. Capsaicin (EC(50) = 853 nM), low pH (<5.5), and noxious heat (44 degrees C) activate hVR1 expressed in Xenopus oocytes. Subthreshold pH (6.4) sensitizes VR1 to capsaicin (EC(50) = 221 nM). This study demonstrates the similarity of human and rat VR1 in integrating multiple noxious stimuli.
Collapse
Affiliation(s)
- D N Cortright
- Department of Biochemistry, Neurogen Corporation, 35 N.E. Industrial Road, Branford, Connecticut, 06405, USA.
| | | | | | | | | | | |
Collapse
|
11
|
Yang YS, Mitta G, Chavanieu A, Calas B, Sanchez JF, Roch P, Aumelas A. Solution structure and activity of the synthetic four-disulfide bond Mediterranean mussel defensin (MGD-1). Biochemistry 2000; 39:14436-47. [PMID: 11087396 DOI: 10.1021/bi0011835] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
MGD-1 is a 39-residue defensin-like peptide isolated from the edible Mediterranean mussel, Mytilus galloprovincialis. This peptide is characterized by the presence of four disulfide bonds. We report here its solid-phase synthesis and an easy way to improve the yield of the four native disulfide bonds. Synthetic and native MGD-1 display similar antibacterial activity, suggesting that the hydroxylation of Trp28 observed in native MGD-1 is not involved in the antimicrobial effect. The three-dimensional solution structure of MGD-1 has been established using (1)H NMR and mainly consists of a helical part (Asn7-Ser16) and two antiparallel beta-strands (Arg20-Cys25 and Cys33-Arg37), together giving rise to the common cystine-stabilized alpha-beta motif frequently observed in scorpion toxins. In MGD-1, the cystine-stabilized alpha-beta motif is stabilized by four disulfide bonds (Cys4-Cys25, Cys10-Cys33, Cys14-Cys35, and Cys21-Cys38), instead of by the three disulfide bonds commonly found in arthropod defensins. Except for the Cys21-Cys38 disulfide bond which is solvent-exposed, the three others belong to the particularly hydrophobic core of the highly constrained structure. Moreover, the C4-P5 amide bond in the cis conformation characterizes the MGD-1 structure. MGD-1 and insect defensin A possess similar bactericidal anti-Gram-positive activity, suggesting that the fourth disulfide bond of MGD-1 is not essential for the biological activity. In agreement with the general features of antibacterial peptides, the MGD-1 and defensin A structures display a typical distribution of positively charged and hydrophobic side chains. The positively charged residues of MGD-1 are located in three clusters. For these two defensin peptides isolated from insects and mollusks, it appears that the rather well conserved location of certain positively charged residues and of the large hydrophobic cluster are enough to generate the bactericidal potency and the Gram-positive specificity.
Collapse
Affiliation(s)
- Y S Yang
- Centre de Biochimie Structurale, CNRS UMR 5048, INSERM U414, Université Montpellier 1, France
| | | | | | | | | | | | | |
Collapse
|
12
|
Lang AM, Feris-Iglesias J, Pena C, Sanchez JF, Stockman L, Rys P, Roberts GD, Henry NK, Persing DH, Cockerill FR. Clinical evaluation of the Gen-Probe Amplified Direct Test for detection of Mycobacterium tuberculosis complex organisms in cerebrospinal fluid. J Clin Microbiol 1998; 36:2191-4. [PMID: 9665989 PMCID: PMC105005 DOI: 10.1128/jcm.36.8.2191-2194.1998] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Eighty-four cerebrospinal fluid (CSF) samples from different children who presented with signs and symptoms of meningitis were evaluated for the presence of Mycobacterium tuberculosis complex organisms by the Gen-Probe Amplified Mycobacterium tuberculosis Direct Test (MTD; Gen-Probe, San Diego, Calif.). All CSF samples had negative acid-fast smears by the Ziehl-Neelsen staining method. M. tuberculosis was recovered from five samples. M. tuberculosis did not grow from 19 additional samples, but the samples were from patients who fulfilled specific clinical and laboratory criteria for probable tuberculous meningitis (TBM). The remaining samples (n = 60) were from patients with other infections or noninfectious causes of meningitis. The results of the MTD were interpreted as positive or negative on the basis of recommended cutoff values for respiratory specimens. These results were interpreted as true or false positives or true or false negatives on the basis of the results of M. tuberculosis culture or whether the patient fulfilled criteria for probable TBM. The Gen-Probe MTD was 33% sensitive and 100% specific for detecting M. tuberculosis complex organisms in these 84 CSF samples. If the cutoff values for positive results were decreased for the MTD (> or = 11,000 versus > or = 30,000 relative light units), the sensitivity increased to 83% and the specificity remained 100%. These results for the MTD are encouraging considering that TBM is a highly fatal disease and difficult to diagnose by conventional laboratory techniques.
Collapse
Affiliation(s)
- A M Lang
- Department of Infectious Diseases, Dr. Robert Reid Cabral Pediatric Hospital, Santo Domingo, Dominican Republic
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Abstract
During 1996 and 1997, several chemical issues that arise in the early stages of preinitiation complex (PIC) formation were resolved. Kinetics experiments indicated that both TBP dimerization and DNA bending influence the rate of TBP-TATA box assembly. Affinity cleavage experiments indicated that TBP lacks the specificity to nucleate assembly of a properly oriented PIC. Finally, high-resolution structures provided the atomic detail of early intermediates in PIC formation.
Collapse
Affiliation(s)
- J M Cox
- Department of Chemistry, PO Box 208107, 225 Prospect Street, Yale University, New Haven, CT 06520-8107, USA
| | | | | | | |
Collapse
|
14
|
Cox JM, Hayward MM, Sanchez JF, Gegnas LD, van der Zee S, Dennis JH, Sigler PB, Schepartz A. Bidirectional binding of the TATA box binding protein to the TATA box. Proc Natl Acad Sci U S A 1997; 94:13475-80. [PMID: 9391050 PMCID: PMC28330 DOI: 10.1073/pnas.94.25.13475] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.1] [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: 02/05/2023] Open
Abstract
By selective attachment of a DNA cleavage agent to specific residues in the yeast TATA box binding protein (yTBP), we demonstrate that, in solution, yTBP binds to the TATA boxes of both the adenovirus major late promoter and the yeast CYC1 promoter with only a modest preference in orientation and binds well to several overlapping binding sites. The general factors TFIIA and TFIIB each increase the rotational and translational selectivity of yTBP but are not sufficient, at least individually, to confer a unique polarity to the preinitiation complex. We conclude that TBP alone cannot define the productive orientation of general factor assembly on a promoter.
Collapse
Affiliation(s)
- J M Cox
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
| | | | | | | | | | | | | | | |
Collapse
|
15
|
Garcia-Pachon E, Padilla-Navas I, Sanchez JF, Jimenez B, Custardoy J. Pleural fluid to serum cholinesterase ratio for the separation of transudates and exudates. Chest 1996; 110:97-101. [PMID: 8681674 DOI: 10.1378/chest.110.1.97] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [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: 02/01/2023] Open
Abstract
STUDY OBJECTIVE To evaluate the usefulness of two new parameters for separating pleural transudates and exudates: pleural fluid cholinesterase level and pleural fluid to serum cholinesterase ratio, and to compare the results with the other well-established criteria. DESIGN Prospective evaluation of the patients referred for diagnostic thoracentesis. SETTING Pulmonary sections of a community hospital and a university hospital. PATIENTS One hundred ninety-three consecutive patients. Forty were excluded for different reasons. MEASUREMENTS The following criteria for separating the pleural effusions in transudates and exudates were analyzed: Light's criteria, the pleural fluid cholesterol level, the pleural fluid to serum cholesterol ratio, the pleural fluid cholinesterase level, and the pleural fluid to serum cholinesterase ratio. RESULTS One hundred fifty-three patients had conditions diagnosed. Thirty-five were classified as having transudates and 118 as exudates. The percentage of effusions misclassified by each parameter was as follows: Light's criteria, 7.8%; pleural fluid cholesterol, 7.8%; pleural fluid to serum cholesterol ratio, 6.5%; pleural fluid cholinesterase, 8.5%; and pleural fluid to serum cholinesterase ratio, 1.3%. CONCLUSIONS The pleural fluid to serum cholinesterase ratio is the most accurate criterion for separating pleural transudates and exudates. If further studies confirm our results, the cholinesterase ratio could be used as the first step in the diagnosis of pleural effusions.
Collapse
Affiliation(s)
- E Garcia-Pachon
- Seccion de Neumologia, Hospital Vega Baja, Orihuela-Alicante, Spain
| | | | | | | | | |
Collapse
|
16
|
Zubov VI, Tretiakov NP, Sanchez JF, Caparica AA. Thermodynamic properties of the C60 fullerite at high temperatures: Calculations taking into account the intramolecular degrees of freedom and strong anharmonicity of the lattice vibrations. Phys Rev B Condens Matter 1996; 53:12080-12085. [PMID: 9982835 DOI: 10.1103/physrevb.53.12080] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
17
|
Sanchez JF, Bacaicoa A, Pascua J, Martin C. [Diagnosis of primary biliary cirrhosis in an 84-year-old man]. An Med Interna 1995; 12:313. [PMID: 7548657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
18
|
Barrero AF, Sanchez JF, Oltra JE, Teva D, Ferrol RR, Elmerabet J, Del Moral RG, Lucena MA, O'Valle F. Synthesis of some retinoids bearing different heterocyclic rings with anticancer activity. Eur J Med Chem 1994. [DOI: 10.1016/0223-5234(94)90136-8] [Citation(s) in RCA: 9] [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: 10/26/2022]
|
19
|
|