ISSN 1866-8836
Клеточная терапия и трансплантация

Is there any role for corticosteroids in GvHD prophylaxis?

Tapani Ruutu

Clinical Research Institute, Helsinki University Hospital, Helsinki, Finland


Correspondence
Professor Tapani Ruutu, Biomedicum 2 C, Tukholmankatu 8 C, 00029 HUS, Helsinki, Finland
E-mail: tapani.ruutu@hus.fi


doi 10.18620/ctt-1866-8836-2020-9-1-8-12
Submitted 15 December 2019
Accepted 24 January 2020

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Cellular Therapy and Transplantation (CTT)
Volume 9, number 1
Contents 

Summary

Corticosteroids have an established role as the first-line treatment of graft-versus-host disease (GvHD), but their role in the prophylaxis of GvHD is less clear. At present, corticosteroids are included in the prophylaxis regimens only rarely. Studies of adding corticosteroid to the most widely used prophylactic regimen, cyclosporine A and a short course of methotrexate, have yielded conflicting results, possibly due to differences in the treatment schedule. In our earlier published randomized prospective study, the addition of methylprednisolone (MP) to cyclosporine and methotrexate resulted in a markedly reduced incidence of acute GvHD. No difference was seen in the survival. In long-term follow-up of this study, after a median follow-up of 24.5 years in living patients, we observed a marked late non-relapse mortality among the patients not given prophylactic MP, probably due to higher incidence of chronic GvHD in this study arm. At the end of the follow-up, 55% of the patients given MP in the prophylaxis were alive, compared with 20% in the control arm. These findings suggest that the role of corticosteroids in GvHD prophylaxis should be reevaluated.

Keywords

Graft-versus-host disease, acute, chronic, prophylaxis, corticosteroids, glucocorticoids, favorable effect.


Introduction

Corticosteroids have an established role in the treatment of graft-versus-host disease (GvHD). Practically all patients who develop clinically significant acute GvHD after hematopoietic stem cell transplantation (HSCT) are primarily treated with corticosteroids, and about half of them show a good response. However, the role of corticosteroids in the prophylaxis of GvHD is much less clear. They have been used in the prophylaxis in combination with a large number of other drugs including cyclosporine A (CsA), tacrolimus, methotrexate (Mtx), mycophenolate mofetil, cyclophosphamide, antilymphocyte globulin, and monoclonal ricin-combined or other antibodies [1]. The proportion of allogeneic HSCT patients given prophylactic corticosteroid has, however, been low. Among the patients reported to the EBMT registry, overall approximately 4 per cent had received corticosteroid prophylaxis, and this proportion has been declining, from about 10 per cent in the 1990s to approximately 2 per cent in the most recent years.

Studies on the addition of corticosteroid to CsA + Mtx

The combination of cyclosporine and a short course of methotrexate is the most widely used regimen for GvHD prophylaxis [2]. The addition of corticosteroid to this regimen has been studied in a few prospective randomized trials. Storb et al. [3] found that the addition of corticosteroid resulted in an increased incidence of acute GvHD, whereas Atkinson and coworkers [4] did not observe any significant effect. In the study of Hoyt et al. [5] a delayed onset of acute GvHD in the group given the triple prophylaxis was seen, but the incidence remained similar to the control group.

Table 1. Schedule of methylprednisolone administration [6]

Ruutu_tab01.jpg



Ruutu_fig01.jpg

Figure 1. Cumulative incidence of grade I-IV acute GvHD in patients given or not given methylprednisolone (MP) [6]

We carried out a prospective randomized comparison of CsA + Mtx + methylprednisolone (MP) vs CsA + Mtx in the years 1989-1994 [6]. In this single-center study, 108 consecutive adult allogeneic transplant patients treated for a malignant blood disease were randomized to receive CsA + Mtx with (53 patients) or without MP (55 patients) for GvHD prophylaxis. They received myeloablative conditioning based on total body irradiation (68 patients) or busulfan (40 patients) and a non-manipulated bone marrow graft from an HLA-identical sibling donor. The schedule of MP administration is shown in Table 1.

We saw a markedly and significantly reduced overall incidence of acute GvHD in the MP+ arm (Fig. 1). Also the incidence of grade II-IV acute GvHD was significantly reduced (13% vs 36%). There was a non-significant trend towards a lower incidence of chronic GvHD in the MP+ arm. The relapse rates did not differ. There was no significant difference in the survival rates (at 6 years 60 per cent and 51 per cent in the MP + and MP- arms, respectively). In the MP+ group the neutrophil recovery was faster, there were fewer infections, and the hospitalization time was shorter. The total amount of MP given was similar in the two arms due to markedly higher incidence of acute GvHD in the MP- arm and aggressive GvHD treatment policy.

We performed a long-term follow-up of the patients in our study after a median follow-up of 24.5 (22.7-26.9) years in living patients [1]. The overall survival had remained similar in the study arms until 15 years post-transplantation (Fig. 2). Thereafter the curves deviated; by the end of the follow-up eleven patients had died in the MP- arm more than 15 years after the transplantation, but no patient in the MP+ arm. The mortality was due to non-relapse causes (Fig. 3), there was no difference in the relapse rate. At the end of the follow-up, 55% of the patients were alive in the MP+ arm, compared with 20% in the control arm.

Ruutu_fig02-03.jpg

Figure 2. Overall survival of patients given or not given methylprednisolone (MP) [1]

Figure 3. Non-relapse mortality of patients given or not given methylprednisolone [1]







Ruutu_fig04.jpg

Figure 4. Prevalence of chronic GvHD in patients given or not given methylprednisolone (MP) [1]

In the patients who died in the MP- group more than 15 years post-transplantation, the causes of death were: bacterial infection in 3 patients, obstructive bronchiolitis in 1, confirmed or probable cardiovascular cause in 3, and second cancer in 4 patients.

We had detailed follow-up data of the patients for the first ten years after the transplantation, and during this period the prevalence of chronic GvHD was significantly lower in the MP+ arm (Fig. 4). At ten years, 28% of the patients in the MP- group but no one in the MP+ group had active chronic GvHD. Of the eleven patients who had a late death in the MP- arm, nine had had chronic GvHD. Of the remaining two patients, one died suddenly of an obviously cardiovascular cause, the other one of bacterial infection.

Discussion

The effects of the addition of corticosteroid to CsA + MP for GvHD prophylaxis have been conflicting in short-term reports [3, 4, 5, 6]. The reasons remain uncertain, but some possible factors can be identified. An important factor may have been the timing of the corticosteroid administration. In the two studies showing no useful effect of corticosteroid by Storb et al. [3] and Atkinson et al. [4], the administration was initiated at the time of the transplantation and given simultaneously with the other components of the regimen, whereas in the studies of Ruutu et al. [6] and Hoyt et al. [5], corticosteroid was initiated only after the short course of Mtx. It is possible that corticosteroid interfered with the effect of the other prophylactic drugs. In the Seattle study [3] the corticosteroid addition resulted in an increased incidence of acute GvHD, but this effect disappeared if the corticoid treatment was postponed to day 15 and started only after the methotrexate course. Another factor may be the duration of corticosteroid administration. In the studies by Storb et al. [3] and Atkinson et al. [4], corticosteroids were given for only 30-35 days, whereas in our study [6] this treatment was given until day 110 and in that of Hoyt et al. [5] until day 100. A third factor may be differences in the target CsA concentrations applied [6]. It looks likely that the conflicting results of the corticosteroid addition to CsA + Mtx are at least partly due to differences in the treatment schedule.

The cause of the difference between the study groups in non-relapse mortality due to high late mortality in the MP- group in our long-term follow-up study is not fully obvious, but chronic GvHD is a likely candidate. The prevalence of chronic GvHD was higher during the first ten years after the transplantation in the group of patients not given corticosteroid.

Nine of eleven patients who died more than 15 years after the transplantation had had chronic GvHD. The main causes of death were infection, cardiovascular event and second cancer. Immune deficiency associated with chronic GvHD is a major cause of morbidity and mortality from infections [7]. Chronic GvHD has been shown to be a risk factor for secondary malignancy [8, 9, 10], and active chronic GvHD is associated with an increased risk of cardiovascular morbidity and mortality [7, 11].

The findings of our long-term study would naturally need confirmation from other studies. However, to our knowledge no study on this subject with a follow-up time long enough to cover the time when the late complications took place in our study has been published. Deeg and coworkers [12] published a long-term follow-up of their randomized study where the addition of MP to CsA prophylaxis had been investigated. In the original publication [13] there was significantly less grade II-IV acute GvHD and more chronic GvHD in the MP+ arm, but no difference in the survival. In the long-term follow-up, the median follow-up time was only six years, and no effect of the corticoid addition on the survival was seen. This is in line with our study with the same follow-up.

The prophylactic use of corticosteroid for GvHD is infrequent at present. This reflects the sparsity of documentation to support such use and variable results in the literature. Our study of the addition of corticosteroid to the combination CsA + Mtx, demonstrating a marked decrease in the incidence of acute GvHD, also showed a beneficial effect on long-term survival, most likely by reducing chronic GvHD and its consequences. These findings suggest that the role of corticosteroids in GvHD prophylaxis should be reevaluated, as also suggested in another transplant setting, haploidentical transplantation [14, 15, 16].

Conflict of interest

No conflicts of interest reported.

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