Abstract
Background
Eosinophilic granulomatosis with polyangiitis (EGPA) is a form of anti-neutrophil cytoplasmic antibody (ANCA) associated vasculitis characterized by eosinophil-rich granulomatous inflammation and small-to-medium vessel vasculitis associated with asthma, rhinosinusitis, and eosinophilia. EGPA is often difficult to distinguish from severe asthma and eosinophilic chronic rhinosinusitis (ECRS) in cases when there are no findings that suggest vasculitis. Dupilumab, an anti-IL-4Rα monoclonal antibody, is expected to be effective in eosinophilic airway inflammatory diseases, such as refractory asthma and chronic rhinosinusitis (CRS). Although transient eosinophilia and eosinophilic pneumoniae have been reported in patients with refractory asthma and CRS associated with dupilumab, few studies have examined the development of EGPA.
Case presentation
We report a case of a 61-year-old woman treated with dupilumab for refractory ECRS and eosinophilic otitis media (EOM) complicated by severe asthma. Although she had a previous history of eosinophilic pneumoniae and myeloperoxidase (MPO) ANCA positivity, there were no apparent findings of vasculitis before the initiation of dupilumab. After the second administration of dupilumab, several adverse events developed, including worsening of ECRS, EOM and asthma, and neuropathy. A blood test showed an eosoinophilia and re-elevation of MPO-ANCA levels after the administration of dupilumab. Therefore, dupilumab was discontinued owing to the development of EGPA, and prednisolone and azathioprine administration was initiated for a remission induction therapy.
Conclusion
To the best of our knowledge, this is the first case report that suggests that dupilumab may directly trigger the manifestation of vasculitis in patients who were previously MPO-ANCA-positive. Although the precise mechanism of how dupilumab could trigger the development of EGPA requires further elucidation, measuring MPO-ANCA in patients with multiple eosinophilic disorders before the initiation of dupilumab might be helpful when considering the possibility of a latent EGPA. When administering dupilumab to patients with a previous history of MPO-ANCA positivity, clinicians must carefully monitor and collaborate with other specialists in the pertinent fields of study for appropriate usage.
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Background
Eosinophilic granulomatosis with polyangiitis (EGPA) is a form of anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis characterized by eosinophil-rich granulomatous inflammation and small to medium vessel vasculitis associated with asthma, rhinosinusitis, and eosinophilia [1, 2]. Eosinophilic chronic rhinosinusitis (ECRS) is a subtype of refractory chronic rhinosinusitis characterized by a highly eosinophilic infiltration in nasal polyps (NPs) [3, 4]. Eosinophilic otitis media (EOM), which is characterized by the accumulation of eosinophils in middle ear effusion (MEE) and middle ear mucosa, is a refractory type of otitis media [5]. ECRS and EOM are often associated with severe asthma. It is often difficult to distinguish EGPA from these conditions when there are no findings suggestive of vasculitis. Dupilumab, an anti-IL-4Rα monoclonal antibody, suppresses type 2 inflammation by blocking dual signals, IL-4, and IL-13; it is expected to be effective in refractory eosinophilic airway inflammatory diseases, such as asthma and ECRS, as a new treatment option in place of systemic corticosteroids (SCS) [6,7,8]. However, appropriate patient selection and clinical course monitoring are crucial in its use. Herein, we report a case of ECRS and EOM complicated with severe asthma that developed EGPA after dupilumab administration.
Case presentation
A 60-year-old woman with no smoking history was diagnosed with allergic rhinitis and asthma; thus, treatment with antihistamines and inhaled corticosteroids/long-acting beta-agonists was started. At the age of 61, she had a prolonged cough, and a chest X-ray at another hospital showed consolidations in the bilateral lung, and she was referred to our hospital. A blood test showed eosinophilia (11.0%, 770/µL), elevated total IgE level (893 IU/mL), and positive myeloperoxidase (MPO) ANCA (10.3 IU/mL). Chest computed tomography (CT) scan revealed multiple consolidations in bilateral lungs (Fig. 1a). Therefore, eosinophilic pneumoniae and EGPA were suspected; however, bronchoalveolar lavage and lung biopsy could not be conducted due to the absence of patient consent. Symptoms of other organ damage, such as neuropathy, presumably linked to vasculitis, were not evident. After 1 month, a negative inversion of MPO-ANCA and lung lesion disappearance without any additional systemic treatment, including SCS, immunosuppressive drugs, and biologics, were confirmed (Fig. 1b).
At 63 years, nasal obstruction, hyposmia, and ear fullness developed. Endoscopic findings showed NPs in the bilateral middle nasal meatus and MEE in the bilateral middle ear. Pathological findings showed an enriched eosinophil infiltration in NPs (147 eosinophils/high power field) and a highly viscous MEE. A sinus CT scan predominantly revealed soft tissue shadows in bilateral ethmoidal sinuses. Therefore, she was diagnosed with ECRS and EOM complicated by asthma. Endoscopic sinus surgery was done, and short-term oral corticosteroid (OCS) treatment was performed postoperatively, tapered prednisolone (PSL) from 20 mg/day for 4 weeks. After the operation, her nasal, ear, and asthma control improved temporarily; however, they gradually worsened with the discontinuation of OCS treatment despite her regular use of high-dose inhaled fluticasone furoate/vilanterol tridentate (200 µg/day), montelukast sodium, and intranasal corticosteroids (Fig. 2a, b, c and d). When her asthma worsened three months after surgery, she had elevated blood eosinophils (7.0%, 490 /µL), total IgE (693 IU/mL), and fractional exhaled nitric oxide (74 ppb), indicating a predominance of type 2 inflammation (Fig. 3).
Computed tomography (CT) images of sinuses, temporal bone, and chest, with otoscopic findings before initiation of dupilumab
Before dupilumab administration, eosinophilic chronic rhinosinusitis (ECRS) relapse was observed. Sinus CT showed bilateral soft tissue shadows predominantly in the right frontal sinus (a). Brown middle ear effusion was partially observed predominantly in the right ear (b). Temporal bone CT slightly showed soft tissue shadows in the right tympanic cavity. White arrows indicate the tympanic cavity (c). Chest CT scan did not show any consolidations (d)
Six months after the operation, 300 mg dupilumab administration was initiated subcutaneously every 2 weeks for refractory ECRS and asthma associated with EOM. Two weeks after dupilumab initiation, no adverse symptoms were noted other than an echo in the ear, although elevated blood eosinophil levels were confirmed. However, after the second administration of dupilumab, right-hand numbness, otalgia, hearing loss, anosmia, cough, facial edema, and headache developed. Four weeks after dupilumab initiation, increased blood eosinophil, C-reactive protein (CRP), and MPO-ANCA levels were noted. Endoscopic findings showed a swollen nasal mucosa and otoscopic findings showed an increase in MEE (Fig. 4b), while audiometry showed the deterioration of mixed hearing loss (Table 1). CT scan showed a relapse of multiple peribronchial consolidations and exacerbation of rhinosinusitis and otitis (Fig. 4a, c and d).
Computed tomography (CT) images of sinuses, temporal bone, and chest, with otoscopic findings four weeks after administration of dupilumab
A sinus CT scan showed obstructed olfactory clefts and increased soft tissue shadows in bilateral sinuses (a). Otoscopy revealed complete retention of middle ear effusion and red-brown tympanic membranes in both ears (b). Temporal bone CT showed opacifications in both tympanic cavities. White arrowheads indicate the tympanic cavity (c). Chest CT scan showed multiple peribronchial consolidations in the lungs (d)
Therefore, dupilumab therapy was discontinued and OCS treatment was initiated, with PSL tapering from 20 mg/day for 14 days. Blood eosinophils (1%, 70/µL) were reduced with OCS burst, and asthma, rhinosinusitis, facial edema, and ear symptoms were controlled. However, numbness in the right hand, positive MPO-ANCA (25.4 IU/mL), and elevated CRP (2.43 mg/dL) were still present, and the patient was referred to the rheumatology department. Although we were unable to gather histological evidence of vasculitis, she was diagnosed with EGPA by a rheumatologist based on adult-onset eosinophilic airway inflammation, nasal polyps, neuropathy, MPO-ANCA positivity, eosinophilia and clinical history. We have also confirmed that this case meets the classification criteria for EGPA as established by 2022 American College of Rheumatology/European Alliance of Associations for Rheumatology [9]. 48 mg/day PSL and 25 mg/day azathioprine (AZP) were started as a remission induction therapy. 3 months later, PSL (19 mg/day) controlled MPO-ANCA levels (2.1 IU/mL) and blood eosinophils (1.0%, 150/µL), but asthma, rhinosinusitis, and right ear otitis worsened. For relapse of EGPA, an increased dose of PSL (55 mg/day) was administered as remission induction therapy again. 6 courses of intravenous cyclophosphamide (750 mg) therapy were used as immunosuppressive agent. Subsequently, she was treated with mepolizumab 300 mg and carefully tapered doses of PSL with monitoring of symptoms and biomarkers including blood eosinophils, MPO-ANCA, and CRP.
Discussion and conclusions
EGPA, ECRS, and eosinophilic asthma often show similar clinical conditions, such as eosinophilia and airway inflammation; they may also have partially overlapping pathophysiology. The clinical trial revealed that dupilumab could induce transient eosinophilia through the inhibition of the production of chemokine such as eotaxins which promote the migration of eosinophils from blood vessels into peripheral tissues [7]. It was reported that patients who developed eosinophilic disorders after dupilumab initiation had a clinical history suggestive of systemic eosinophilic disease or received several cycles of SCS tapering before an adverse event [8]. Some patients developed EGPA after dupilumab discontinuation or after switching biologics from anti-IL-5 or anti-IL-5 receptor alpha antibodies to dupilumab [10,11,12]. Conversly, cases of EGPA development have been reported with no apparent event other than the introduction of dupilumab [13, 14]. In our case, the development of EGPA-related symptoms and the re-elevation of ANCA were observed without a history of SCS tapering after dupilumab initiation (Table 2). The timing of the onset of vasculitis-related symptoms after dupilumab induction seems to be variable. When asthma, sinusitis, or other systemic symptoms worsen after starting dupilumab, the possibility of an eosinophil-related development disorder, including EGPA, should be considered. It is critical to discontinue dupilumab and consider the need for SCS and rheumatology consultation.
To the best of our knowledge, this is the first case report that suggests that dupilumab may directly trigger the manifestation of vasculitis in patients who were previously MPO-ANCA-positive. This patient may have had eosinophilic vasculitis with pulmonary involvement from the start, which worsened after receiving dupilumab. However, there is no histological evidence, such as bronchoalveolar lavage or lung biopsy, that proves or excludes this scenario. The precise mechanism of how dupilumab could trigger these conditions is not yet well-understood. Nishiyama et al. reported two cases of an elevated serum IL-5 level, which is the main driver of eosinophilic inflammation, in patients who developed eosinophilic pneumoniae after dupilumab administration; however, other patients who did not develop eosinophilic pneumoniae associated with dupilumab therapy did not show these outcomes at their institution [15]. It might be speculated that the homeostasis reaction to IL-4 and IL-13 blockage induced excessive eosinophilic inflammation and EGPA development.
Although there was no obvious histological finding suggestive of vasculitis, latent EGPA was suspected based on eosinophilia and MPO-ANCA positivity associated with a history of multiple eosinophilic disorders including late-onset asthma and rhinosinusitis. Even though nearly 70% of patients with EGPA are MPO-ANCA-negative, measuring MPO-ANCA in patients with ECRS complicated with eosinophilic disorders including EOM, severe asthma, and eosinophilic pneumoniae, before the initiation of dupilumab may be useful when considering the possibility of a latent EGPA. Nakamaru et al. reported that 85.7% of patients with EGPA had nasal symptoms, and 52.4% had ear symptoms, presenting as mild to moderately mixed or sensorineural hearing loss. Moreover, rhinosinusitis and asthma often appeared before the definitive diagnosis of EGPA, whereas ear symptoms occurred after it, indicating the importance of recognizing its characteristic ear and nasal symptoms for an early diagnosis [16]. In this case, careful monitoring of clinical courses including asthma and nasal and ear symptoms during the administration of dupilumab, allowed us to consider the manifestation of EGPA.
Eosinophilic inflammation and ANCA-mediated vasculitis are the main features of EGPA, but little is known about its pathogenesis [1]. The levels of IL-5, the most potent activator of eosinophils, are increased levels in patients with EGPA [17]. The clinical efficacy of mepolizumab, an anti-IL-5 monoclonal antibody, against severe asthma, rhinosinusitis, and EGPA was demonstrated in several clinical trials [18,19,20,21,22,23]. Additionally, T cells from patients with EGPA showed increased levels of IL-4 and IL-13 production [24]. Type 2 inflammation appears to play a crucial role in the pathogenesis of EGPA. Although it is speculated that dupilumab, which broadly suppresses type 2 inflammation, may induce the development of EGPA in the present case, some reports had demonstrated the clinical efficacy of dupilumab for EGPA [25,26,27]. The different clinical responses to dupilumab in patients with EGPA may suggest that EGPA is a heterogeneous disease, similar to asthma and rhinosinusitis. When administering dupilumab to patients with multiple eosinophilic diseases and previous history of MPO-ANCA positivity, careful monitoring of blood tests, clinical symptoms, and events, including rashes, worsening pulmonary symptoms, cardiac complications, and vasculitis symptoms like neuropathy, and collaboration with other specialists, including pulmonologists and rheumatologists, are important.
Data Availability
The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.
Abbreviations
- ANCA:
-
anti-neutrophil cytoplasmic antibody
- AZP:
-
azathioprine
- CT:
-
computed tomography
- CRP:
-
C-reactive protein
- ECRS:
-
eosinophilic chronic rhinosinusitis
- EGPA:
-
eosinophilic granulomatosis with polyangiitis
- EOM:
-
eosinophilic otitis media
- PSL:
-
methylprednisolone
- MEE:
-
middle ear effusion
- NPs:
-
nasal polyps
- OCS:
-
oral corticosteroid
- PSL:
-
prednisolone
- SCS:
-
systemic corticosteroids
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This work was supported by a Grant-in-Aid for Early-Career Scientists (JSPS KAKENHI Grant number JP20K18295).
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IS collected data and prepared the article. YM, SK, and KH collected and summarized the data. AT, RY, and HK revised it critically for important intellectual content. All authors approved the final version.
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Suzaki, I., Tanaka, A., Yanai, R. et al. Eosinophilic granulomatosis with polyangiitis developed after dupilumab administration in patients with eosinophilic chronic rhinosinusitis and asthma: a case report. BMC Pulm Med 23, 130 (2023). https://doi.org/10.1186/s12890-023-02415-6
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DOI: https://doi.org/10.1186/s12890-023-02415-6