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3 results on '"Siitonen, T. (Timo)"'

1. Autograft cellular composition and outcome in myeloma patients:results of the prospective multicenter GOA study

Author

Turunen, A. (Antti), Silvennoinen, R. (Raija), Partanen, A. (Anu), Valtola, J. (Jaakko), Siitonen, T. (Timo), Putkonen, M. (Mervi), Sankelo, M. (Marja), Pyörälä, M. (Marja), Kuittinen, T. (Taru), Penttilä, K. (Karri), Sikiö, A. (Anu), Savolainen, E.-R. (Eeva-Riitta), Mäntymaa, P. (Pentti), Pelkonen, J. (Jukka), Varmavuo, V. (Ville), and Jantunen, E. (Esa)

Subjects
autograft cellular composition, surgical procedures, operative, autologous stem cell transplantation, myeloma, T lymphocytes, outcome, hematologic recovery, NK cells, CD34+ cells
Abstract

Background: Autologous stem cell transplantation (auto-SCT) is a widely used treatment option in multiple myeloma (MM) patients. The optimal graft cellular composition is not known. Study design and methods: Autograft cellular composition was analyzed after freezing by flow cytometry in 127 MM patients participating in a prospective multicenter study. The impact of graft cellular composition on hematologic recovery and outcome after auto-SCT was evaluated. Results: A higher graft CD34⁺ cell content predicted faster platelet recovery after auto-SCT in both the short and long term. In patients with standard-risk cytogenetics, a higher graft CD34⁺ count (0.065 × 10⁶/kg, p = 0.009) and NK cell count (%gt;2.5 × 10⁶/kg, p = 0.026), lenalidomide maintenance and standard-risk cytogenetics predicted better PFS. In contrast, a higher CD34+ count (>2.5 × 10⁶/kg, p = 0.015) predicted worse PFS. A very low CD3⁺ cell count (≤20 × 10⁶/kg, p = 0.001) in the infused graft and high-risk cytogenetics remained predictive of worse OS. Conclusions: Autograft cellular composition may impact outcome in MM patients after auto-SCT. More studies are needed to define optimal graft composition.

Published
2021

2. CD34+ cell mobilization, blood graft composition, and posttransplant recovery in myeloma patients compared to non‐Hodgkinʼs lymphoma patients:results of the prospective multicenter GOA study

Author

Turunen, A. (Antti), Partanen, A. (Anu), Valtola, J. (Jaakko), Ropponen, A. (Antti), Siitonen, T. (Timo), Kuittinen, O. (Outi), Kuitunen, H. (Hanne), Putkonen, M. (Mervi), Sankelo, M. (Marja), Keskinen, L. (Leena), Savolainen, E. (Eeva‐Riitta), Pyörälä, M. (Marja), Kuittinen, T. (Taru), Silvennoinen, R. (Raija), Penttilä, K. (Karri), Sikiö, A. (Anu), Vasala, K. (Kaija), Mäntymaa, P. (Pentti), Pelkonen, J. (Jukka), Varmavuo, V. (Ville), and Jantunen, E. (Esa)

Subjects
hemic and lymphatic diseases
Abstract

Background: Autologous stem cell transplantation is an established treatment option for patients with multiple myeloma (MM) or non‐Hodgkinʼs lymphoma (NHL). Study design and methods: In this prospective multicenter study, 147 patients with MM were compared with 136 patients with NHL regarding the mobilization and apheresis of blood CD34+ cells, cellular composition of infused blood grafts, posttransplant recovery, and outcome. Results: Multiple myeloma patients mobilized CD34+ cells more effectively (6.3 × 10⁶/kg vs. 3.9 × 10⁶/kg, p = 0.001). The proportion of poor mobilizers (peak blood CD34+ cell count 100 days) nonrelapse mortality (NRM; 6% vs. 0%, p = 0.003). Conclusions: Non‐Hodgkinʼs lymphoma and MM patients differ in terms of mobilization of CD34+ cells, graft cellular composition, and posttransplant recovery. Thus, the optimal graft characteristics may also be different.

Published
2020

3. RVD induction and autologous stem cell transplantation followed by lenalidomide maintenance in newly diagnosed multiple myeloma:a phase 2 study of the Finnish Myeloma Group

Author

Luoma, S. (Sini), Anttila, P. (Pekka), Säily, M. (Marjaana), Lundan, T. (Tuija), Heiskanen, J. (Jouni), Siitonen, T. (Timo), Kakko, S. (Sakari), Putkonen, M. (Mervi), Ollikainen, H. (Hanna), Terävä, V. (Venla), Sankelo, M. (Marja), Partanen, A. (Anu), Launonen, K. (Kirsi), Räsänen, A. (Anu), Sikiö, A. (Anu), Suominen, M. (Merja), Bazia, P. (Piotr), Kananen, K. (Kristiina), Lievonen, J. (Juha), Selander, T. (Tuomas), Pelliniemi, T.-T. (Tarja-Terttu), Ilveskero, S. (Sorella), Huotari, V. (Virva), Mäntymaa, P. (Pentti), Tienhaara, A. (Anri), Jantunen, E. (Esa), Silvennoinen, R. (Raija), Luoma, S. (Sini), Anttila, P. (Pekka), Säily, M. (Marjaana), Lundan, T. (Tuija), Heiskanen, J. (Jouni), Siitonen, T. (Timo), Kakko, S. (Sakari), Putkonen, M. (Mervi), Ollikainen, H. (Hanna), Terävä, V. (Venla), Sankelo, M. (Marja), Partanen, A. (Anu), Launonen, K. (Kirsi), Räsänen, A. (Anu), Sikiö, A. (Anu), Suominen, M. (Merja), Bazia, P. (Piotr), Kananen, K. (Kristiina), Lievonen, J. (Juha), Selander, T. (Tuomas), Pelliniemi, T.-T. (Tarja-Terttu), Ilveskero, S. (Sorella), Huotari, V. (Virva), Mäntymaa, P. (Pentti), Tienhaara, A. (Anri), Jantunen, E. (Esa), and Silvennoinen, R. (Raija)

Abstract

Autologous stem cell transplantation (ASCT) combined with novel agents is the standard treatment for transplant-eligible, newly diagnosed myeloma (NDMM) patients. Lenalidomide is approved for maintenance after ASCT until progression, although the optimal duration of maintenance is unknown. In this trial, 80 patients with NDMM received three cycles of lenalidomide, bortezomib, and dexamethasone followed by ASCT and lenalidomide maintenance until progression or toxicity. The primary endpoint was the proportion of flow-negative patients. Molecular response was assessed if patients were flow-negative or in stringent complete response (sCR). By intention to treat, the overall response rate was 89%. Neither median progression-free survival nor overall survival (OS) has been reached. The OS at 3 years was 83%. Flow-negativity was reached in 53% and PCR-negativity in 28% of the patients. With a median follow-up of 27 months, 29 (36%) patients are still on lenalidomide and 66% of them have sustained flow-negativity. Lenalidomide maintenance phase was reached in 8/16 high-risk patients but seven of them have progressed after a median of only 6 months. In low- or standard-risk patients, the outcome was promising, but high-risk patients need more effective treatment approach. Flow-negativity with the conventional flow was an independent predictor for longer PFS.

Published
2019

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