失明につながるヘルペスウイルス網膜炎の重症化リスクを解明ー患者の免疫状態に着目し、網膜剥離と重度視力障害の危険因子を明らかにー

2026-07-14

2026-07-13 東京科学大学

東京科学大学の研究グループは、失明の原因となるヘルペスウイルス網膜炎について、患者の免疫状態と臨床経過を解析し、網膜剥離や重度視力障害の危険因子を明らかにした。急性網膜壊死とサイトメガロウイルス網膜炎を対象に、免疫状態、初診時視力、網膜病変の範囲、炎症の程度、眼内液PCRによるウイルス量、網膜剥離の発症時期、治療介入、最終視力を総合的に評価した。その結果、急性網膜壊死であることと初診時視力の低下が網膜剥離の重要な危険因子であり、さらに網膜病変の広がり、硝子体混濁、眼内ウイルス量も重症化や視力予後を予測する上で有用であることが判明した。また、免疫抑制状態は病型や臨床経過に大きく影響し、病型だけでなく免疫状態を考慮した評価が重要であることが示された。本研究は、初診時から重症化リスクを高精度に評価し、抗ウイルス療法や硝子体手術などの適切な治療時期の判断に役立つ臨床指標を提供し、失明予防や視力予後の改善への貢献が期待される。

図1. ヘルペスウイルス網膜炎における重症化リスク評価

＜関連情報＞

免疫状態別のヘルペスウイルス網膜炎：網膜剥離および重度視覚障害の臨床表現型と予測因子
Herpesvirus Retinitis by Immune Status: Clinical Phenotypes and Predictors of Retinal Detachment and Severe Visual Impairment

Yaru Zou MD, Mingming Yang MD, Jing Zhang MD, Kyoko Ohno-Matsui MD, PhD, Koju Kamoi MD, PhD
Ophthalmology Retina Available online: 6 June 2026
DOI:https://doi.org/10.1016/j.oret.2026.06.002

Purpose
To evaluate the clinical manifestations, retinal detachment (RD) patterns, treatment strategies, and visual outcomes in herpesvirus retinitis and to identify predictors of RD and severe visual impairment.

Design
Retrospective longitudinal cohort study.

Participants
Among 1175 patients screened for suspected viral retinitis (2013–2025), 120 patients (144 eyes) with acute retinal necrosis (ARN) or cytomegalovirus retinitis (CMVR) were included.

Methods
Demographic, clinical, imaging, and treatment data were reviewed. Diagnosis was based on the Standardization of Uveitis Nomenclature classification criteria, irrespective of polymerase chain reaction (PCR) status. Multivariable regression, generalized estimating equation modeling, Kaplan–Meier survival analysis, and Cox regression were performed to compare ARN and CMVR phenotypes and identify predictors of RD and severe visual impairment (<20/200). Polymerase chain reaction testing was recorded, and subgroup analyses were performed according to PCR status.

Main Outcome Measures
Ocular and systemic characteristics between CMVR and ARN and risk factors for RD and severe visual impairment.

Results
Mean follow-up was 5.5 years. Cytomegalovirus retinitis occurred mainly in patients with lymphoma (P = 0.022) and prior immunosuppressive therapy (P = 0.027), whereas ARN more commonly showed unilateral involvement (P = 0.012), peripheral necrosis (B = 1.91; P = 0.046), and a more fulminant course (B = –0.06; P < 0.001). Retinal detachment developed earlier and more frequently in ARN (log-rank P < 0.001). In multivariable Cox analysis, ARN (hazard ratio [HR], 11.52; 95% confidence interval [CI], 1.93–68.86; P = 0.007) and worse baseline visual acuity (HR, 2.06; 95% CI, 1.23–3.44; P = 0.006) were independently associated with an increased risk of RD. Surgical intervention (B = –2.50; 95% CI, –4.72 to –0.20; P = 0.033) and concurrent RD (B = –1.28; 95% CI, –2.55 to –0.02; P = 0.047) were independently associated with lower odds of severe visual impairment. Polymerase chain reaction-based subgroup analyses showed broadly similar clinical and outcome patterns.

Conclusions
Host immune status was associated with distinct clinical phenotypes and outcome patterns in herpesvirus retinitis. Cytomegalovirus retinitis occurred in immunocompromised patients and showed a more indolent course. ARN showed broader retinal involvement and earlier RD. Retinal detachment timing and surgical intervention were associated with visual outcomes. These findings highlight distinct disease patterns and may improve early recognition and management.

Financial Disclosure(s)
Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.