Mucositis after reduced intensity conditioning and allogeneic stem cell transplantation

Area of Science:

• Hematology
• Oncology
• Transplant Medicine

Background:

• Therapy-related mucositis is a significant complication following allogeneic stem cell therapy (alloSCT).
• Reduced intensity conditioning (RIC) regimens for alloSCT are associated with less severe mucositis compared to myeloablative conditioning.
• However, mucositis can still be a serious issue even after RIC-alloSCT.

Purpose of the Study:

• To investigate factors predicting the severity of mucositis in patients undergoing alloSCT after RIC.
• To correlate mucositis grading using established scales (Bearman and WHO).
• To identify clinical parameters associated with mucositis severity post-RIC-alloSCT.

Main Methods:

• A cohort of 52 patients undergoing RIC-alloSCT was analyzed.
• Conditioning regimens included total body irradiation (TBI) or chemotherapy.
• Graft-versus-host disease (GvHD) prophylaxis involved cyclosporine A and mycophenolate mofetil (MMF), with most patients receiving methotrexate (MTX).

Main Results:

• The Bearman and World Health Organization (WHO) mucositis scales demonstrated excellent correlation.
• Chemotherapy-based conditioning resulted in significantly more severe mucositis than TBI-based conditioning (p < 0.002).
• Increased creatinine levels on day +1 post-SCT (p < 0.05), and delayed engraftment of leukocytes (cc = 0.26, p < 0.02) and platelets (cc = 0.38, p < 0.001) correlated with mucositis severity.

Conclusions:

• Conditioning regimen and elevated creatinine levels on day +1 post-SCT are key predictors of mucositis severity after RIC-alloSCT.
• Monitoring creatinine levels on day +1 can help identify patients at risk for severe mucositis.
• These findings support proactive management strategies for mucositis in high-risk patients undergoing RIC-alloSCT.