Abstract / Summary
This study aims to evaluate the efficacy of recombinant human interleukin-7 (rhIL-7) in treating lymphopenia and related clinical outcomes in patients with infection-associated lymphopenia through a meta-analysis. A Literature retrieval was conducted across databases, including the Cochrane Library, Web of Science, PubMed, Embase, SinoMed, CNKI, Wanfang, and VIP from the inception until October 2025. Randomized controlled trials of rhIL-7 for the treatment of lymphopenia were screened and identified for eligibility. Primary outcomes included absolute lymphocyte counts (ALC), mortality, intensive care unit (ICU) length of stay, and incidence of secondary infections. Four studies were included, covering sepsis and COVID-19. In septic patients, rhIL-7 significantly increased ALC (MD = 1.33 at 3 weeks; 95% CI [0.29, 2.38]; MD = 1.14 at 4 weeks; 95% CI [0.02, 2.25]), CD4+ T-cell counts (MD = 0.56 at 3 weeks; 95% CI [0.08, 1.05]) and CD8+ T-cell counts (MD = 0.40 at 2 weeks; 95% CI [0.05, 0.76]). However, rhIL-7 failed to reduce mortality (RR = 1.01; 95% CI [0.36, 2.81]) or the incidence of secondary infections (RR = 1.05; 95% CI [0.48, 2.30]) in patients with sepsis. In patients with COVID-19, rhIL-7 did not significantly increase ALC at 30 days (MD = 0.46; 95% CI [-0.15, 1.08]) or reduce mortality (RR = 0.85; 95% CI [0.55, 1.33]), but it did significantly reduce the incidence of secondary infections (RR = 0.58; 95% CI [0.46, 0.74]; p < 0.0001). A combined analysis revealed that rhIL-7 significantly increased ALC (MD = 1.15 at 3 weeks; 95% CI [0.47, 1.84]; MD = 0.80 at 4 weeks; 95% CI [0.24, 1.36]) and reduced the risk of secondary infections (RR = 0.64; 95% CI [0.50, 0.81]), but had no effect on mortality or ICU length of stay. RhIL-7 effectively ameliorates sepsis-associated lymphopenia but does not improve prognosis. Although rhIL-7 reduces the incidence of secondary infections in COVID-19 patients, confounding factors related to the pandemic context must be taken into account.
Primary Source
Respiratory medicine
Ask Prognia AI
Have questions about this meta-analysis?
Prognia AI can search this source alongside 35M+ PubMed papers and current ESC, AHA, NICE, and ADA guidelines to give you a fully cited clinical answer.