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Tobin JWD, Rule G, Colvin K, Calvente L, Hodgson D, Bell S, Dunduru C, Gallo J, Tsang ES, Tan X, Wong J, Pearce J, Campbell R, Tneh S, Shorten S, Ng M, Cochrane T, Tam CS, Abro E, Hawkes E, Hodges G, Kansara R, Talaulikar D, Gilbertson M, Johnston AM, Savage KJ, Villa D, Morris K, Ratnasingam S, Janowski W, Kridel R, Cheah CY, MacManus M, Matigian N, Mollee P, Gandhi MK, Hapgood G. Outcomes of stage I/II follicular lymphoma in the PET era: an international study from the Australian Lymphoma Alliance. Blood Adv 2019; 3:2804-2811. [PMID: 31570492 PMCID: PMC6784528 DOI: 10.1182/bloodadvances.2019000458] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 05/17/2019] [Accepted: 07/04/2019] [Indexed: 01/17/2023] Open
Abstract
Management practices in early-stage (I/II) follicular lymphoma (FL) are variable and include radiation (RT), systemic therapy, or combined modality therapy (CMT). There is a paucity of data regarding maintenance rituximab in this cohort. We conducted an international retrospective study of patients with newly diagnosed early-stage FL staged with positron emission tomography (PET)-computed tomography and bone marrow biopsy. Three hundred sixty-five patients (stage I, n = 221), median age 63 years, treated from 2005-2017 were included, with a median follow-up of 45 months. Management included watchful waiting (WW; n = 85) and active treatment (n = 280). The latter consisted of RT alone (n = 171) or systemic therapy (immunochemotherapy [n = 63] or CMT [n = 46]). Forty-nine systemically treated patients received maintenance rituximab; 72.7% of stage I patients received RT alone, compared to 42.6% with stage II (P < .001). Active therapies yielded comparable overall response rates (P = .87). RT alone and systemic therapy without maintenance rituximab yielded similar progression-free survival (PFS) (hazard ratio [HR], 1.32; 95% confidence interval [CI], 0.77-2.34; P = .96). Maintenance rituximab improved PFS (HR, 0.24; 95% CI, 0.095-0.64; P = .017). The incidence of transformation was lower with systemic therapy compared to RT or WW (HR, 0.20; 95% CI, 0.070-0.61; P = .034). Overall survival was similar among all practices, including WW (P = .40). In the largest comparative assessment of management practices in the modern era, variable practices each resulted in similar excellent outcomes. Randomized studies are required to determine the optimal treatment in early-stage FL.
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Affiliation(s)
- Joshua W D Tobin
- Department of Haematology, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Gabrielle Rule
- Department of Haematology, Sir Charles Gairdner Hospital, Perth, WA, Australia
| | - Katherine Colvin
- Department of Haematology, Sir Charles Gairdner Hospital, Perth, WA, Australia
| | - Lourdes Calvente
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - David Hodgson
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Stephen Bell
- Department of Haematology, Calvary Mater Health, Newcastle, NSW, Australia
| | - Chengetai Dunduru
- Department of Haematology, Andrew Love Cancer Centre, University Hospital Geelong, Geelong, VIC, Australia
| | - James Gallo
- Department of Haematology, Royal Brisbane Hospital, Brisbane, QLD, Australia
| | - Erica S Tsang
- Division of Medical Oncology, BC Cancer, Vancouver, BC, Canada
| | - Xuan Tan
- Department of Haematology, Royal Hobart Hospital, Hobart, TAS, Australia
| | - Jonathan Wong
- Department of Clinical Haematology, Monash Health, Melbourne, Victoria, Australia
| | - Jessica Pearce
- Department of Haematology, Townsville Hospital, Townsville, QLD, Australia
| | - Robert Campbell
- Department of Oncology and Clinical Haematology, Austin Hospital, Melbourne, VIC, Australia
| | - Shao Tneh
- Department of Haematology, Mater Hospital Brisbane, Brisbane, QLD, Australia
| | - Sophie Shorten
- Department of Haematology, St Vincent's Hospital, Melbourne, VIC, Australia
| | - Melissa Ng
- Department of Haematology, Gold Coast University Hospital, Gold Coast, QLD, Australia
| | - Tara Cochrane
- Department of Haematology, Gold Coast University Hospital, Gold Coast, QLD, Australia
| | - Constantine S Tam
- Department of Haematology, St Vincent's Hospital, Melbourne, VIC, Australia
| | - Emad Abro
- Department of Haematology, Mater Hospital Brisbane, Brisbane, QLD, Australia
| | - Eliza Hawkes
- Department of Oncology and Clinical Haematology, Austin Hospital, Melbourne, VIC, Australia
| | - Georgina Hodges
- Department of Haematology, Townsville Hospital, Townsville, QLD, Australia
| | - Roopesh Kansara
- Section of Medical Oncology and Haematology, University of Manitoba, Winnipeg, MB, Canada
| | - Dipti Talaulikar
- Department of Haematology, Canberra Hospital, Canberra, ACT, Australia
| | - Michael Gilbertson
- Department of Clinical Haematology, Monash Health, Melbourne, Victoria, Australia
| | - Anna M Johnston
- Department of Haematology, Royal Hobart Hospital, Hobart, TAS, Australia
| | - Kerry J Savage
- Division of Medical Oncology, BC Cancer, Vancouver, BC, Canada
| | - Diego Villa
- Division of Medical Oncology, BC Cancer, Vancouver, BC, Canada
| | - Kirk Morris
- Department of Haematology, Royal Brisbane Hospital, Brisbane, QLD, Australia
| | - Sumi Ratnasingam
- Department of Haematology, Andrew Love Cancer Centre, University Hospital Geelong, Geelong, VIC, Australia
| | - Wojt Janowski
- Department of Haematology, Calvary Mater Health, Newcastle, NSW, Australia
| | - Robert Kridel
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Chan Y Cheah
- Department of Haematology, Sir Charles Gairdner Hospital, Perth, WA, Australia
| | | | - Nicholas Matigian
- QFAB Bioinformatics, Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia
| | - Peter Mollee
- Department of Haematology, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Maher K Gandhi
- Department of Haematology, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Greg Hapgood
- Department of Haematology, Princess Alexandra Hospital, Brisbane, QLD, Australia
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Fraley R, Straubinger RM, Rule G, Springer EL, Papahadjopoulos D. Liposome-mediated delivery of deoxyribonucleic acid to cells: enhanced efficiency of delivery related to lipid composition and incubation conditions. Biochemistry 1981; 20:6978-87. [PMID: 6274382 DOI: 10.1021/bi00527a031] [Citation(s) in RCA: 160] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Delivery of liposome-encapsulated simian virus 40 (SV40) DNA to African green monkey Related to been used as a probe to study liposome--cell interactions and to determine conditions which favor the intracellular delivery of liposome contents to cells. The efficiency of DNA delivery by various liposome preparations (monitored by infectivity assays) was found to be dependent both on the magnitude of vesicle binding to cells and on the resistance of liposomes to cell-induced leakage of contents. Acidic phospholipids were much more effective in both binding and delivery, and phosphatidylserine (PS) was the best in both aspects. The inclusion of 50 mol % cholesterol in liposomes reduces the cell-induced leakage of vesicle contents (2--5-fold) and substantially enhances the delivery of DNA to cells (2--10-fold). Following incubation of cells with negatively charged liposomes containing SV40 DNA, infectivity can be enhanced greatly by brief exposure of the cells to glycerol solutions. In contrast, only slight enhancement by glycerol was observed for SV40 DNA encapsulated in neutral or positively charged liposomes. The results of competition experiments between empty phosphatidylcholine liposomes and DNA-containing PS liposomes also suggest possible differences in the interaction of neutral and negatively charged liposome preparations with cells. Morphological studies indicate that the glycerol treatment stimulates membrane ruffling and vacuolization and suggest that the enhanced uptake of liposomes occurs by an endocytosis-like process. Results obtained with metabolic inhibitors are also consistent with the interpretation that the enhancement of liposome delivery in glycerol-treated cells occurs via an energy-dependent endocytotic pathway. Pretreatment of cells with chloroquine, a drug which alters lysosomal activity, further enhanced infectivity in glycerol-treated cells (4-fold). This observation suggests the involvement of a lysosomal processing step at some point in the expression of liposome-encapsulated DNA and, more importantly, illustrates the possibility of altering cellular mechanism to engineer more efficient delivery by liposomes. Under optimal conditions determined in this study, the efficiency of liposome-mediated SV40 DNA delivery was increased more than 1000-fold over that obtained by simply incubating cells with liposomes. It is also demonstrated that these conditions enhance delivery of other molecules, besides DNA, which are encapsulated in liposomes.
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