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Daly B, Brawley OW, Gospodarowicz MK, Olopade OI, Fashoyin-Aje L, Smart VW, Chang IF, Tendler CL, Kim G, Fuchs CS, Beg MS, Zhang L, Legos JJ, Duran CO, Kalidas C, Qian J, Finnegan J, Pilarski P, Keane H, Shen J, Silverstein A, Wu YL, Pazdur R, Li BT. Remote Monitoring and Data Collection for Decentralized Clinical Trials. JAMA Netw Open 2024; 7:e246228. [PMID: 38607626 PMCID: PMC11015350 DOI: 10.1001/jamanetworkopen.2024.6228] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 02/13/2024] [Indexed: 04/13/2024] Open
Abstract
Importance Less than 5% of patients with cancer enroll in a clinical trial, partly due to financial and logistic burdens, especially among underserved populations. The COVID-19 pandemic marked a substantial shift in the adoption of decentralized trial operations by pharmaceutical companies. Objective To assess the current global state of adoption of decentralized trial technologies, understand factors that may be driving or preventing adoption, and highlight aspirations and direction for industry to enable more patient-centric trials. Design, Setting, and Participants The Bloomberg New Economy International Cancer Coalition, composed of patient advocacy, industry, government regulator, and academic medical center representatives, developed a survey directed to global biopharmaceutical companies of the coalition from October 1 through December 31, 2022, with a focus on registrational clinical trials. The data for this survey study were analyzed between January 1 and 31, 2023. Exposure Adoption of decentralized clinical trial technologies. Main Outcomes and Measures The survey measured (1) outcomes of different remote monitoring and data collection technologies on patient centricity, (2) adoption of these technologies in oncology and all therapeutic areas, and (3) barriers and facilitators to adoption using descriptive statistics. Results All 8 invited coalition companies completed the survey, representing 33% of the oncology market by revenues in 2021. Across nearly all technologies, adoption in oncology trials lags that of all trials. In the current state, electronic diaries and electronic clinical outcome assessments are the most used technology, with a mean (SD) of 56% (19%) and 51% (29%) adoption for all trials and oncology trials, respectively, whereas visits within local physician networks is the least adopted at a mean (SD) of 12% (18%) and 7% (9%), respectively. Looking forward, the difference between the current and aspired adoption rate in 5 years for oncology is large, with respondents expecting a 40% or greater absolute adoption increase in 8 of the 11 technologies surveyed. Furthermore, digitally enabled recruitment, local imaging capabilities, and local physician networks were identified as technologies that could be most effective for improving patient centricity in the long term. Conclusions and Relevance These findings may help to galvanize momentum toward greater adoption of enabling technologies to support a new paradigm of trials that are more accessible, less burdensome, and more inclusive.
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Affiliation(s)
- Bobby Daly
- Department of Medicine, Memorial Sloan Kettering Cancer Center and Weill Cornell Medicine, New York, New York
| | - Otis W. Brawley
- School of Medicine, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | | | - Olufunmilayo I. Olopade
- Medicine and Human Genetics, Center for Clinical Cancer Genetics and Global Health, University of Chicago Medical Center, Chicago, Illinois
| | - Lola Fashoyin-Aje
- Oncology Center of Excellence, US Food and Drug Administration, Silver Spring, Maryland
| | | | | | | | | | - Charles S. Fuchs
- Genentech, South San Francisco, California
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Muhammad Shaalan Beg
- Science 37, Durham, North Carolina
- Internal Medicine, Gastrointestinal Oncology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas
| | | | | | | | | | | | | | - Piotr Pilarski
- McKinsey Cancer Center, McKinsey & Company, New York, New York
| | - Harriet Keane
- McKinsey Cancer Center, McKinsey & Company, New York, New York
| | - Johanna Shen
- McKinsey Cancer Center, McKinsey & Company, New York, New York
| | - Amy Silverstein
- McKinsey Cancer Center, McKinsey & Company, New York, New York
| | - Yi-Long Wu
- Guangdong Lung Cancer Institute, Chinese Thoracic Oncology Group, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Richard Pazdur
- Oncology Center of Excellence, US Food and Drug Administration, Silver Spring, Maryland
| | - Bob T. Li
- Department of Medicine, Memorial Sloan Kettering Cancer Center and Weill Cornell Medicine, New York, New York
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Sridhara R, Marchenko O, Jiang Q, Barksdale E, Chen J, Dreyer N, Fashoyin-Aje L, Garrett-Mayer E, Gormley N, Gwise T, Hess L, Mandrekar S, Pignatti F, Rantell K, Raven A, Shen YL, Singh H, Tendler CL, Theoret M, Pazdur R. Evaluation of Treatment Effect in Underrepresented Population in Cancer Trials: Discussion with International Regulators. Stat Biopharm Res 2022. [DOI: 10.1080/19466315.2022.2128404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | - Nicole Gormley
- Oncology Center of Excellence, US FDA, Silver Spring, MD
| | - Thomas Gwise
- Office of Biostatistics, CDER US FDA, Silver Spring, MD
| | | | | | | | | | | | - Yuan-Li Shen
- Office of Biostatistics, CDER US FDA, Silver Spring, MD
| | - Harpreet Singh
- Oncology Center of Excellence, US FDA, Silver Spring, MD
| | | | - Marc Theoret
- Oncology Center of Excellence, US FDA, Silver Spring, MD
| | - Richard Pazdur
- Oncology Center of Excellence, US FDA, Silver Spring, MD
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Jakubowiak AJ, Griffith KA, Reece DE, Hofmeister CC, Lonial S, Zimmerman TM, Campagnaro EL, Schlossman RL, Laubach JP, Raje NS, Anderson T, Mietzel MA, Harvey CK, Wear SM, Barrickman JC, Tendler CL, Esseltine DL, Kelley SL, Kaminski MS, Anderson KC, Richardson PG. Lenalidomide, bortezomib, pegylated liposomal doxorubicin, and dexamethasone in newly diagnosed multiple myeloma: a phase 1/2 Multiple Myeloma Research Consortium trial. Blood 2011; 118:535-43. [PMID: 21596852 PMCID: PMC3142898 DOI: 10.1182/blood-2011-02-334755] [Citation(s) in RCA: 71] [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] [Received: 02/07/2011] [Accepted: 05/02/2011] [Indexed: 12/17/2022] Open
Abstract
This phase 1/2 trial evaluated combination lenalidomide, bortezomib, pegylated liposomal doxorubicin, and dexamethasone (RVDD) in newly diagnosed multiple myeloma (MM) patients. Patients received RVDD at 4 dose levels, including the maximum tolerated dose (MTD). Patients with a very good partial response or better (≥ VGPR) after cycle 4 proceeded to autologous stem cell transplantation or continued treatment. The primary objectives were MTD evaluation and response to RVDD after 4 and 8 cycles. Seventy-two patients received a median of 4.5 cycles. The MTDs were lenalidomide 25 mg, bortezomib 1.3 mg/m(2), pegylated liposomal doxorubicin 30 mg/m(2), and dexamethasone 20/10 mg, as established with 3-week cycles. The most common adverse events were fatigue, constipation, sensory neuropathy, and infection; there was no treatment-related mortality. Response rates after 4 and 8 cycles were 96% and 95% partial response or better, 57% and 65% ≥ VGPR, and 29% and 35% complete or near-complete response, respectively. After a median follow-up of 15.5 months, median progression-free survival (PFS) and overall survival (OS) were not reached. The estimated 18-month PFS and OS were 80.8% and 98.6%, respectively. RVDD was generally well tolerated and highly active, warranting further study in newly diagnosed MM patients. This trial was registered at www.clinicaltrials.gov as NCT00724568.
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Bukowski R, Ernstoff MS, Gore ME, Nemunaitis JJ, Amato R, Gupta SK, Tendler CL. Pegylated interferon alfa-2b treatment for patients with solid tumors: a phase I/II study. J Clin Oncol 2002; 20:3841-9. [PMID: 12228203 DOI: 10.1200/jco.2002.02.051] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.3] [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: 11/20/2022] Open
Abstract
PURPOSE The efficacy of interferon alfa has been established in treating advanced melanoma and renal cell carcinoma (RCC) patients. We conducted a phase I/II study to determine the maximum-tolerated dose (MTD), the safety and tolerability, and the preliminary efficacy of once-weekly pegylated interferon alfa-2b (IFNalpha-2b) in patients with advanced solid tumors (primarily RCC). PATIENTS AND METHODS To determine the MTD, 35 patients with a variety of advanced solid tumors received 0.75 to 7.5 micro g/kg/wk of pegylated IFNalpha-2b by subcutaneous injection for 12 weeks. An additional 35 previously untreated RCC patients received 6.0 and 7.5 micro g/kg/wk for up to 12 weeks. Patients with a response or stable disease after 12 weeks were eligible for the extension protocol and were treated for up to 1 year or until disease progression. RESULTS The MTD for pegylated IFNalpha-2b at 12 weeks was 6.0 micro g/kg/wk. One year of 6.0 micro g/kg/wk was well tolerated with appropriate dose modification; no grade 3 or 4 fatigue occurred, and safety was comparable with that with nonpegylated IFNalpha-2b. The most common nonhematologic adverse events included mild to moderate nausea, anorexia, and fatigue. Six patients had grade 3 or 4 hematologic toxicity. Twenty-nine patients continued on the extension protocol. Four patients had a complete response, and five patients had a partial response. Among 44 previously untreated RCC patients, the objective response rate was 14%. Median survival for all RCC patients was 13.2 months. CONCLUSION Pegylated IFNalpha-2b was active and well tolerated in patients with metastatic solid tumors, including RCC, at doses up to 6.0 micro g/kg/wk.
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Affiliation(s)
- Ronald Bukowski
- Experimental Therapeutics Program, Cleveland Clinic Cancer Center, Cleveland, OH 44195, USA.
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Srivastava DK, Tendler CL, Milani D, English MA, Licht JD, Wilson SH. The HIV-1 transactivator protein Tat is a potent inducer of the human DNA repair enzyme beta-polymerase. AIDS 2001; 15:433-40. [PMID: 11242139 DOI: 10.1097/00002030-200103090-00001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE This study examines the effects of the HIV-1 regulatory proteins, Tat and Rev, on the expression of the DNA polymerase beta (beta-pol) gene, which encodes a key protein in the DNA base-excision repair pathway. The rationale for these experiments is to examine the potential involvement of base-excision repair protein deregulation in HIV-1-related lymphomas. DESIGN Expression of beta-pol mRNA was examined in AIDS-related lymphomas and non-AIDS-related lymphomas and as a function of HIV-1 infection of B cells in culture. The effect of Tat or Rev over-expression on beta-pol promoter expression was tested by transient co-transfection assays with a beta-pol promoter reporter plasmid and a Tat or Rev over-expression plasmid. METHODS Northern blot analysis was used to quantitate beta-pol expression in lymphoma and cells. Raji cells were co-transfected with a chloramphenicol acetyltransferase (CAT) reporter plasmid and a plasmid over-expressing Tat or Rev. CAT activity was measured in transfected cells. RESULTS beta-Pol mRNA was > 10-fold higher in AIDS-related than in non-AIDS B-lineage lymphomas. beta-Pol expression was up-regulated in a B-cell line upon infection with HIV-1, and increased in Raji cells upon recombinant expression of the Tat gene. The beta-pol promoter was transactivated (fourfold induction) by Tat, but not by Rev. Tat-dependent transactivation required a binding site for the transcription factor Sp1 in the beta-pol promoter. CONCLUSION These results suggest that HIV-1 Tat can interact with cellular transcription factors to increase the steady-state level of beta-pol in B cells. Tat-mediated induction of beta-pol may alter DNA stability in AIDS-related lymphomas.
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MESH Headings
- Animals
- Base Sequence
- Chloramphenicol O-Acetyltransferase/genetics
- DNA Polymerase beta/biosynthesis
- DNA Polymerase beta/genetics
- Enzyme Induction
- Gene Expression Regulation, Viral
- Gene Products, rev/pharmacology
- Gene Products, tat/pharmacology
- HIV-1/genetics
- Humans
- Lymphoma, AIDS-Related/genetics
- Lymphoma, AIDS-Related/metabolism
- Lymphoma, B-Cell/genetics
- Molecular Sequence Data
- Plasmids
- Promoter Regions, Genetic
- RNA, Messenger/metabolism
- Transcription, Genetic
- Transfection
- Tumor Cells, Cultured
- Up-Regulation
- rev Gene Products, Human Immunodeficiency Virus
- tat Gene Products, Human Immunodeficiency Virus
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Affiliation(s)
- D K Srivastava
- Laboratory of Structural Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
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Solal-Céligny P, Lepage E, Brousse N, Tendler CL, Brice P, Haïoun C, Gabarre J, Pignon B, Tertian G, Bouabdallah R, Rossi JF, Doyen C, Coiffier B. Doxorubicin-containing regimen with or without interferon alfa-2b for advanced follicular lymphomas: final analysis of survival and toxicity in the Groupe d'Etude des Lymphomes Folliculaires 86 Trial. J Clin Oncol 1998; 16:2332-8. [PMID: 9667247 DOI: 10.1200/jco.1998.16.7.2332] [Citation(s) in RCA: 135] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE To compare progression-free survival (PFS), overall survival (OS), and toxicity of a doxorubicin-containing regimen administered alone or in combination with interferon alfa-2b (IFNalpha) in patients with low-grade follicular lymphoma (FL) and poor prognostic factors. PATIENTS AND METHODS Two hundred sixty-eight patients with advanced-stage FL received cyclophosphamide, doxorubicin, teniposide, and prednisone (CHVP) monthly for 6 months, then every 2 months for 12 months. After randomization, 242 patients were evaluated for efficacy: 119 received CHVP alone, and 123 also received IFNalpha at a dose of 5 million units three times weekly for 18 months. RESULTS After a 6-year median follow-up, the patients treated with CHVP + IFNalpha showed significantly longer median PFS than those who received CHVP alone (2.9 years v 1.5 years, respectively; P = .0002) and significantly longer median OS (not reached v 5.6 years, respectively; P = .008). Although some side effects, which included neutropenia, asthenia, fever, elevated serum transaminase levels, flu-like symptoms, and thrombocytopenia, were more frequently observed in patients who received the combination regimen, these reactions were moderate. IFNalpha was withdrawn because of toxicity in 10% of the patients, and a dosage reduction or temporary suspension was required in 28%. CONCLUSION With long-term follow-up of 6 years, these results confirm that the addition of IFNalpha to a doxorubicin-containing regimen for patients with advanced-stage and clinically aggressive FL not only increased PFS, as in most other similar trials, but also prolonged OS. Toxicity was moderate. The beneficial effects of this combined chemotherapy and IFNalpha regimen on OS probably reflect the selection of FL patients with poor prognostic factors.
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Tendler CL, Burton JD, Jaffe J, Danielpour D, Charley M, McCoy JP, Pittelkow MR, Waldmann TA. Abnormal cytokine expression in Sézary and adult T-cell leukemia cells correlates with the functional diversity between these T-cell malignancies. Cancer Res 1994; 54:4430-5. [PMID: 7913876] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The Sézary syndrome (SzS) and adult T-cell leukemia (ATL) are malignant proliferations of mature T-lymphocytes that possess distinct functions. Sézary cells function as helper cells, whereas ATL cells are usually suppressor effectors. Although phenotypically similar (CD4+/CD7-/CD8-), these functional differences between the T-cell lymphoproliferative disorders suggest different patterns of cytokine expression. We wished to delineate the cytokine mechanisms potentially underlying the diverse functional characteristics of SzS and ATL. Therefore, we analyzed the expression of interleukins (IL) 2, 4, and 5, gamma-interferon, and transforming growth factor beta 1 in the highly purified leukemic T-cells from 5 SzS and 5 ATL patients. Decreased mRNA and protein levels of IL-2, gamma-interferon, and IL-5 were detected in mitogen-stimulated ATL and SzS cells when compared to similarly cultured normal CD4+ cells. In contrast, IL-4 production was markedly up-regulated in the leukemic cells of 4/5 SzS patients as compared to ATL and normal controls. Finally, fresh ATL cells secreted higher levels of transforming growth factor beta 1 into the culture medium than the malignant T-cells from SzS patients. Collectively these results suggest that, similar to the murine CD4-expressing T-cell subsets Th1 and Th2, different cytokine profiles exist in a human population of CD4+ T-cells. Moreover, the distinct patterns of IL-4 and transforming growth factor beta 1 expression by SzS and ATL cells, respectively, are most consistent with the functional differences (i.e., helper versus suppressor activity) between these T-cell malignancies and thus may play important roles in the pathogenesis of the paraneoplastic features associated with these two leukemias.
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Affiliation(s)
- C L Tendler
- Division of Pediatric Oncology, Mount Sinai School of Medicine, New York, New York 10029-6574
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Tendler CL, Mandell L, Granowetter L. Local control measures in a toddler with a pelvic primitive neuroectodermal tumor. Med Pediatr Oncol 1993; 21:287-94. [PMID: 8385736 DOI: 10.1002/mpo.2950210411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- C L Tendler
- Division of Pediatric Hematology/Oncology, Mount Sinai Hospital, New York, New York
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Tendler CL, Greenberg SJ, Burton JD, Danielpour D, Kim SJ, Blattner WA, Manns A, Waldmann TA. Cytokine induction in HTLV-I associated myelopathy and adult T-cell leukemia: alternate molecular mechanisms underlying retroviral pathogenesis. J Cell Biochem 1991; 46:302-11. [PMID: 1757474 DOI: 10.1002/jcb.240460405] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The human T-cell lymphotropic virus type I (HTLV-I) is capable of inducing a variety of host cellular genes including many of the cytokines responsible for immune regulation and osteoclast activation. This derangement in cytokine expression may contribute to the panoply of disease states associated with HTLV-I infection such as the adult T-cell leukemia (ATL) and HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP). We wished to determine if there was a correlation between the expression of an array of cytokines and the diverse clinical manifestations of ATL and HAM/TSP. Utilizing the techniques of specific mRNA amplification by the polymerase chain reaction (PCR) as well as Northern blotting, we analyzed the ex vivo mRNA expression of gamma-interferon (IFN-gamma), tumor necrosis factor-alpha (TNF-alpha), interleukin-1 beta (IL-1 beta), and transforming growth factor-beta 1 (TGF-beta 1) in the peripheral blood of HAM/TSP and ATL patients as well as asymptomatic seropositive carriers. IFN-gamma, TNF-alpha, and IL-1 beta transcripts were up-regulated in patients with HAM/TSP and seropositive carriers when compared to their levels in ATL and normal controls. In contrast, the ATL patients constitutively expressed higher levels of TGF-beta 1 mRNA than HAM/TSP and seropositive carriers. In addition, TNF-alpha and IL-1 beta serum levels were elevated in HAM/TSP, but not in ATL patients nor seropositive carriers. However, the circulating leukemic cells from ATL patients secreted increased levels of TGF-beta 1 protein into the culture medium than T-cells derived from HAM/TSP patients. Collectively these results suggest that induction of IFN-gamma, TNF-alpha, and IL-1 beta in HAM/TSP may initiate an inflammatory cascade with subsequent events leading to immune mediated destruction of the central nervous system in these patients. Expression of osteoclast activators such as TNF-alpha and IL-1 beta is not associated with hypercalcemia in ATL. Finally, impaired cellular and humoral immune responses present in ATL, but not in HAM/TSP, may be related to elevated levels of TGF-beta 1 produced by the leukemic cells. These differences in retroviral-induced host cytokine expression in ATL and HAM/TSP suggest alternate roles in disease pathogenesis.
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Affiliation(s)
- C L Tendler
- Metabolism Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
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Tendler CL, Greenberg SJ, Blattner WA, Manns A, Murphy E, Fleisher T, Hanchard B, Morgan O, Burton JD, Nelson DL. Transactivation of interleukin 2 and its receptor induces immune activation in human T-cell lymphotropic virus type I-associated myelopathy: pathogenic implications and a rationale for immunotherapy. Proc Natl Acad Sci U S A 1990; 87:5218-22. [PMID: 2367534 PMCID: PMC54293 DOI: 10.1073/pnas.87.13.5218] [Citation(s) in RCA: 145] [Impact Index Per Article: 4.3] [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: 12/31/2022] Open
Abstract
A state of T-cell activation, reflected by a marked degree of spontaneous proliferation in vitro, exists among patients with human T-cell lymphotropic virus type I (HTLV-I)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) but not in those with retroviral-induced adult T-cell leukemia (ATL). We wished to define the mechanism by which the immune activation of circulating cells from HAM/TSP is driven, thus gaining insight into the pathogenesis of this HTLV-I-associated disease. By using a modification of the polymerase chain reaction, we compared the levels of interleukin 2 (IL-2) and IL-2 receptor alpha chain (IL-2R alpha) mRNA expression to the transcription of the HTLV-I transactivator gene, pX, in peripheral blood mononuclear cells of HAM/TSP and ATL patients as well as seropositive carriers. Up-regulation of IL-2 and IL-2R alpha transcripts was detected in HAM/TSP and seropositive carriers that paralleled the coordinate mRNA expression of the pX transactivator. In addition, IL-2 and soluble IL-2R alpha serum levels in HAM/TSP and seropositive carriers were elevated. Despite markedly elevated levels of soluble IL-2R alpha in ATL, transcripts for IL-2 and pX were not demonstrable in the circulating cells. Finally, the marked degree of in vitro spontaneous proliferation present in HAM/TSP was profoundly inhibited by specific anti-IL-2R or anti-IL-2 blocking antibodies. Collectively, these results suggest that immune activation in HAM/TSP, in contrast to ATL, is virally driven by the transactivation and coordinate expression of IL-2 and IL-2R alpha. This deregulated autocrine process may contribute to the evolution of inflammatory nervous system damage in HAM/TSP.
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Affiliation(s)
- C L Tendler
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
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Kim SJ, Kehrl JH, Burton J, Tendler CL, Jeang KT, Danielpour D, Thevenin C, Kim KY, Sporn MB, Roberts AB. Transactivation of the transforming growth factor beta 1 (TGF-beta 1) gene by human T lymphotropic virus type 1 tax: a potential mechanism for the increased production of TGF-beta 1 in adult T cell leukemia. J Exp Med 1990; 172:121-9. [PMID: 2358774 PMCID: PMC2188182 DOI: 10.1084/jem.172.1.121] [Citation(s) in RCA: 177] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We examined the effect of the human T lymphotropic virus type 1 (HTLV-I) Tax gene product on the human transforming growth factor beta 1 (TGF-beta 1) promoter. Transfection of deleted constructs of the TGF-beta 1 promoter revealed regions homologous with AP-1 binding sites that were required for Tax-induced transactivation of the TGF-beta 1 promoter. In addition, we examined the expression and secretion of TGF-beta in fresh leukemic cells isolated from patients with adult T cell leukemia (ATL) and in HTLV-1-infected T cell lines. We report that fresh leukemic cells from ATL patients constitutively produce high levels of TGF-beta 1 mRNA and secrete TGF-beta 1 but not TGF-beta 2 into the culture medium. In addition, long-term ATL cell lines expressed significant amounts of TGF-beta 1 mRNA as well as detectable levels of TGF-beta 1 protein. These results suggest a role for Tax in the upregulation of TGF-beta 1 in HTLV-I-infected cells.
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Affiliation(s)
- S J Kim
- Laboratory of Chemoprevention, National Cancer Institute, Bethesda, Maryland 20892
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