Impact of COVID-19 and vaccination campaign on 1,755 systemic sclerosis patients during first three years of pandemic. Possible risks for individuals with impaired immunoreactivity to vaccine, ongoing immunomodulating treatments, and disease-related lung involvement during the next pandemic phase

Introduction

The impact of COVID-19 pandemic represents a serious challenge for 'frail' patients' populations with inflammatory autoimmune systemic diseases such as systemic sclerosis (SSc). We investigated the prevalence and severity of COVID-19, as well the effects of COVID-19 vaccination campaign in a large series of SSc patients followed for the entire period (first 38 months) of pandemic.

Patients and method

This prospective survey study included 1755 unselected SSc patients (186 M, 1,569F; mean age 58.7 ± 13.4SD years, mean disease duration 8.8 ± 7.3SD years) recruited in part by telephone survey at 37 referral centers from February 2020 to April 2023. The following parameters were carefully evaluated: i. demographic, clinical, serological, and therapeutical features; ii. prevalence and severity of COVID-19; and iii. safety, immunogenicity, and efficacy of COVID-19 vaccines.

Results

The prevalence of COVID-19 recorded during the whole pandemic was significantly higher compared to Italian general population (47.3 % vs 43.3 %, p < 0.000), as well the COVID-19-related mortality (1.91 % vs 0.72 %, p < 0.001). As regards the putative prognostic factors of worse outcome, COVID-19 positive patients with SSc-related interstitial lung involvement showed significantly higher percentage of COVID-19-related hospitalization compared to those without (5.85 % vs 1.73 %; p < 0.0001), as well as of mortality rate (2.01 % vs 0.4 %; p = 0.002). Over half of patients (56.3 %) received the first two plus one booster dose of vaccine; while a fourth dose was administered to 35.6 %, and only few of them (1.99 %) had five or more doses of vaccine. Of note, an impaired seroconversion was recorded in 25.6 % of individuals after the first 2 doses of vaccine, and in 8.4 % of patients also after the booster dose. Furthermore, the absence of T-cell immunoreactivity was observed in 3/7 patients tested by QuantiFERON® SARSCoV-2 Starter Set (Qiagen). The efficacy of vaccines, evaluated by comparing the COVID-19-related death rate recorded during pre- and post-vaccination pandemic periods, revealed a quite stable outcome in SSc patients (death rate from 2.54 % to 1.76 %; p = ns), despite the significant drop of mortality observed in the Italian general population (from 2.95 % to 0.29 %; p < 0.0001).

Conclusions

An increased COVID-19 prevalence and mortality rate was recorded in SSc patients; moreover, the efficacy of vaccines in term of improved outcomes was less evident in SSc compared to Italian general population. This discrepancy might be explained by concomitant adverse prognostic factors: increased rate of non-responders to vaccine in SSc series, low percentage of individuals with four or more doses of vaccine, ongoing immunomodulating treatments, disease-related interstitial lung disease, and/or reduced preventive measures in the second half of pandemic. A careful monitoring of response to COVID-19 vaccines together with adequate preventive/therapeutical strategies are highly recommendable in the near course of pandemic in this frail patients' population.

Liver Involvement in Patients with Systemic Sclerosis: Role of Transient Elastography in the Assessment of Hepatic Fibrosis and Steatosis

Background Systemic sclerosis (SSc) is a rare, multisystemic disorder of connective tissue characterized by widespread inflammation, vascular abnormalities, and both skin and visceral organ fibrosis. Tissue fibrosis is the final phase of a complex biological process of immune activation and vascular damage. Objectives The aim of the study was to assess hepatic fibrosis and steatosis in SSc patients by transient elastography (TE). Methods Fifty-nine SSc patients fulfilling the 2013 ACR/EULAR classification criteria were recruited. Clinical and laboratory findings, modified Rodnan skin score (mRSS), activity index, videocapillaroscopy, echocardiography, and lung function data were analyzed. Liver stiffness (LS) was measured by transient elastography (TE), with 7 kPa used as the cut-off value for significant liver fibrosis. In addition, hepatic steatosis was evaluated by means of controlled attenuation parameter (CAP) findings. Specifically, CAP values ≥ 238 ≤ 259 dB/m were considered consistent with mild steatosis (S1), values ≥ 260 ≤ 290 dB/m were compatible with moderate steatosis (S2), and values ≥ 291 dB/m were indicative of severe steatosis (S3). Results The median age of patients was 51 years, with a median disease duration of 6 years. The median LS was 4.5 (2.9-8.3) kPa; 69.5% of patients had no evidence of fibrosis (F0); 27.1% displayed LS values between 5.2 and 7 kPa; and only 3.4% of patients had LS values > 7 kPa (F3). The median CAP value for liver steatosis was 223 dB/m (IQR: 164-343). Overall, 66.1% of patients did not show evidence of steatosis (CAP values < 238 dB/m); 15.2% showed values consistent with mild (S1) steatosis (CAP value ≥ 238 ≤ 259 dB/m); 13.5% had moderate (S2) steatosis (CAP value ≥ 260 ≤ 290 dB/m); and 5.1% were deemed to have severe steatosis (S3) due to CAP values ≥ 291 dB/m. Conclusions Although systemic sclerosis is associated with fibrosis of the skin and several organs, only 3.4% of our patient population showed evidence of marked liver fibrosis, which is the same prevalence as that expected in the general population. Therefore, fibrosis of the liver did not appear to be a significant concern in SSc patients, albeit moderate fibrosis could still be detected in a significant proportion of subjects. A prolonged follow-up may clarify whether liver fibrosis in SSc patients may still progress. Likewise, the prevalence of significant steatosis was low (5.1%) and depended on the same variables associated with fatty liver disease in the general population. TE was shown to be an easy and valuable method for detection and screening of hepatic fibrosis in SSc patients with no additional risk factors for liver disease and may be useful to assess the potential progression of liver fibrosis over time.

AB1412 IMPORTANCE OF TELEMEDICINE IN THE SYSTEMIC SCLEROSIS DURING COVID-19 PANDEMIC

Background

Severe acute respiratory syndrome coronavirus 2 (SARSCoV-2), also called COVID-19 disease, was firstly reported in December 2019 in China and soon declared a pandemic by the World Health Organization (WHO) on March 11, 2020 (1). As a result, patients’ visits to medical facilities are affected. Systemic sclerosis (SSc) is a chronic systemic autoimmune disease characterized by vascular damage, autoimmunity, and fibrosis. In these patients, a tight follow-up is crucial to verify the specific cases and clinical needs. In particular, the infection risk in SSc might also be related not only to disease activity but also to possible flares due to therapy discontinuation. Telemedicine has demonstrated as a valid alternative to improve the quality of rheumatic patients’ care during COVID-19 pandemic, thus reducing hospitalizations only to urgent admissions (2)

Objectives

In december 2020 the Azienda Policlincio Vanvitelli approved telemedicine by IRPLUS platform as a particular measure in the face of the COVID-19 pandemic. In this study we examined the impact of the COVID-19 pandemic on visit status of SSc patients at our centre and the patient benefits of telemedicine

Methods

In this study, we retrospectively enrolled 480 SSc patients who visited in our centre between January and December 2021. Of the patients included in the study, 198 patients (18 males and 180 females) used telemedicine, while 282 patients (20 males and 262 females) did not use it

Results

During televisites, we assessed possible contacts with COVID-19 patients and/or potential risk of COVID-19, investigating about the occurrence of typical symptoms in the last 15 days. No significant differences in background data, such as the severity of the disease, type of treatment and frequency of complications were found between these two groups. In more detail, SSc is associated interstitial lung disease was complicated by 35.4% and 31.3% of patients in the telemedicine and non-telemedicine groups, respectively (p=0.9). Besides, 53.7% of patients in the telemedicine group and 49.9% of patients in the non-telemedicine group were treated with prednisone (p=0.344). 74.1% of patients in the telemedicine group were administered immunosuppressive drugs, compared to 78.5% of patients in the non-telemedicine group (p=1.000). The number of patients who discontinued treatment was significantly lower in the telemedicine group, with 14 patients (7%) compared to 30 patients (11.4%) in the non-telemedicine group (p=0.003). These patients who voluntarily discontinued treatment were finally resumed. However, the time required to resume treatment differed between the two groups. This means that the duration of treatment interruption was significantly shorter in the telemedicine group, with a mean (± standard deviation) of 1.85 (5.5) days compared to 7.5 (12.1) days in the non-telemedicine group (p=0.001). There was no difference in the amount of change in laboratory data between the groups receiving telemedicine and those not receiving telemedicine.

Conclusion

This study confirmed the data published by Norimatsu et al (3), as that telemedicine may help SSc patients to continue and/or resume treatment under the COVID-19 pandemic.

SSc is associated to interstitial lung disease, cardiac involvement, vascular injury and prednisone and immunosuppressive agents have been used as treatment.

Thus, disruptions in treatment can lead to worsening of symptoms and missed opportunities for early interventions for complications. Patients who use telemedicine may be more motivated to treat, and this retrospective study demonstered it. This study suggests that telemedicine can be useful in treating SSc and other diseases that require ongoing treatment in the COVID-19 infection.

References

[1]ZHU N, N Engl J Med 2020

[2]CONTRERAS CM, et al. Telemedicine. J Gastrointest Surg 2020

[3]Y. Norimatsu et al, Clinical and Experimental Rheumatology 2021

Disclosure of Interests

None declared