Corowa-kun: A messenger app chatbot delivers COVID-19 vaccine information, Japan 2021

Background

There is a long history in Japan of public concerns about vaccine adverse events. Few studies have assessed how mobile messenger apps affect COVID-19 vaccine hesitancy.

Methods

Corowa-kun, a free chatbot, was created on February 6, 2021 in LINE, the most popular messenger app in Japan. Corowa-kun provides instant, automated answers to 70 frequently asked COVID-19 vaccine questions. A cross-sectional survey with 21 questions was performed within Corowa-kun during April 5–12, 2021.

Results

A total of 59,676 persons used Corowa-kun during February–April 2021. Of them, 10,192 users (17%) participated in the survey. Median age was 55 years (range 16–97), and most were female (74%). COVID-19 vaccine hesitancy reported by survey respondents decreased from 41% to 20% after using Corowa-kun. Of the 20% who remained hesitant, 16% (1,675) were unsure, and 4% (3 6 4) did not intend to be vaccinated. Factors associated with vaccine hesitancy were: age 16–34 (odds ratio [OR] = 3.7; 95% confidential interval [CI]: 3.0–4.6, compared to age ≥ 65), female sex (OR = 2.4; Cl: 2.1–2.8), and history of a previous vaccine side-effect (OR = 2.5; Cl: 2.2–2.9). Being a physician (OR = 0.2; Cl: 0.1–0.4) and having received a flu vaccine the prior season (OR = 0.4; Cl: 0.3–0.4) were protective.

Conclusions

A substantial number of people used the chabot in a short period. Mobile messenger apps could be leveraged to provide accurate vaccine information and to investigate vaccine intention and risk factors for vaccine hesitancy.

RGDX1 X2 motif regulates integrin αvβ5 binding for pluripotent stem cell adhesion

The arginine-glycine-aspartic acid (RGD) motif is a cell adhesion sequence that binds to integrins. Some RGD-containing peptides promote adhesion of both embryonic stem cells and induced pluripotent stem cells (iPSCs); however, not all such RGD-containing peptides are active. In this study, we elucidated the role of RGD-neighboring sequences on iPSC adhesion using diverse synthetic peptides and recombinant proteins. Our results indicate that iPSC adhesion requires RGDX₁ X₂  sequences, such as RGDVF and RGDNY, and that the X₁ X₂ residues are essential for the adhesion via integrin αvβ5 but not αvβ3. iPSCs express integrin αvβ5 but not αvβ3; therefore, iPSC adhesion requires the RGDX₁ X₂ -containing sequences. The importance of the X₁ X₂ residues was confirmed with both HeLa and A549 cells, which express integrin αvβ5 but not αvβ3. Analysis of RGD-neighboring sequences provides important insights into ligand-binding specificity of integrins. Identification of integrin αvβ5-binding motifs is potentially useful in drug development, drug delivery, cell culture, and tissue engineering.

Quantitative assessment of copy number alterations by liquid biopsy for neuroblastoma

Liquid biopsy, a method of detecting genomic alterations using blood specimens, has recently attracted attention as a non-invasive alternative to surgical tissue biopsy. We attempted quantitative analysis to detect amplification of MYCN (MYCNamp) and loss of heterozygosity at 11q (11qLOH), which are clinical requisites as prognostic factors of neuroblastoma. In this study, cell-free DNA (cfDNA) was extracted from plasma samples from 24 neuroblastoma patients at diagnosis. Copy numbers of MYCN and NAGK genes were quantitatively analyzed by droplet digital PCR (ddPCR). 11qLOH was also assessed by detecting allelic imbalances of heterozygous single nucleotide polymorphisms in the 11q region. The results obtained were compared to those of specimens from tumor tissues. The correlation coefficient of MYCN copy number of cfDNA and tumor DNA was 0.88 (P < 0.00001). 11qLOH was also accurately detected from cfDNA, except for one case with localized NB. Given the high accuracy of liquid biopsy, to investigate components of cfDNA, the proportion of tumor-derived DNA was estimated by examining the variant allele frequency of tumor-specific mutations in cfDNA. The proportion of tumor-derived DNA in cfDNA was 42.5% (range, 16.9%-55.9%), suggesting sufficient sensitivity of liquid biopsy for neuroblastoma. In conclusion, MYCN copy number and 11qLOH could be quantitatively analyzed in plasma cfDNA by ddPCR assay. These results suggest that plasma cfDNA can be substituted for tumor DNA and can also be applied for comprehensive genomic profiling analysis. This article is protected by copyright. All rights reserved.

POS0681 DRUG RETENTION RATE AND EFFECTIVENESS OF JAK INHIBITOR IN PATIENTS WITH DIFFICULT-TO-TREAT RHEUMATOID ARTHRITIS

Background

Recently, the disease activity of rheumatoid arthritis (RA) was improved due to the ‘treat-to-target’ strategy. However, some patients remain various symptoms despite recommended treatment was performed. Then, the term of ‘difficult-to-treat RA (D2TRA)’ is widely recognized. Janus kinase inhibitor (JAKi) might be effective for D2TRA patients, because JAKi can simultaneously block the function of multiple cytokines.

Objectives

The aim of this study was to evaluate drug retention rate and effectiveness of JAKi in patients with D2TRA.

Methods

This study included 220 RA patients (tofacitinib 101, baricitinib 83, upadacitinib 20, peficitinib 14, filgotinib 2) treated with JAKi. Sixty-two patients were treated as first line bDMARDs/JAKi (1st group), 57 patients were treated as second line bDMARDs/ JAKi (2nd group), 101 patients were treated as third and more bDMARDs/ JAKi. In these 101 patients, 25 patients did not met D2TRA criteria (non-D2TRA group) and 76 patients met D2TRA criteria (D2TRA group). Drug retention rate and effectiveness of JAKi were evaluated during 24 weeks in each group.

Results

Usage rate of methotrexate was lower and dosage of glucocorticoid was higher in D2TRA group than in other groups (Table 1). Drug retention rate at 24 weeks was 87.1% (54/62) in 1st group, 80.1% (46/57) in 2nd group, 88% (22/25) in non-D2TRA group, 61.8% (47/76) in D2TRA group. Drug retention rate was lower in D2TRA group compared to 1st group, 2nd group and non-DT2RA group (p<0.01, p=0.03, p=0.01). DAS28-CRP was 4.4, 4.0, 3.9, 4.4 at baseline, 3.0, 3.0, 3.3, 3.5 at 4 weeks, 2.5, 2.9, 2.7, 3.3 at 12 weeks, 2.5, 3.0, 2.9, 3.2 at 24 weeks in 1st group, 2nd group, non-D2TRA group and D2TRA group, respectively. Improvement ratio of DAS28-CRP was 32.9, 27.6, 20.4, 19.3 % at 4 weeks, 40.8, 26.5, 28.1, 19.5 % at 12 weeks, 40.8, 24.6, 18.7, 24.7 % at 24 weeks. DAS28-CRP was improved in all groups. Altough 1st group showed higher improvement ratio of DAS28-CRP at 24 weeks compared to 2nd group, non-DT2RA group and D2TRA group (p<0.01, p<0.01, p<0.01), there was no differences between DT2RA group and 2nd group or non-D2TRA group (p=0.95, p=0.48). SDAI was 22.9, 19.9, 18.3, 23.9 at baseline, 11.8, 11.9, 13.3, 14.4 at 4 weeks, 7.9, 11.3, 8.4, 13.3 at 12 weeks, 8.5, 11.5, 9.7, 12.6 at 24 weeks. CDAI was 21.3, 18.8, 17.6, 21.8 at baseline, 11.3, 11.2, 12.5, 13.9 at 4 weeks, 7.5, 10.9, 8.0, 12.3 at 12 weeks, 8.1, 10.7, 8.6, 12.1 at 24 weeks. HAQ was 1.15, 0.99, 0.89, 1.39 at baseline, 0.84, 0.76, 0.93, 1.22 at 4 weeks, 0.79, 0.84, 0.77, 1.17 at 12 weeks, 0.76, 0.79, 0.76, 1.14 at 24 weeks. Improvement rate of HAQ at 24 weeks were 44.3%, 23.9%, 21.2%, 8.1%.

Table 1.

Baseline characteristics of RA patients

1st group (n=62)2nd group (n=57)non-D2TRA group (n=25)D2TRA group (n=76)Age (years)64.9 ± 14.866.1 ± 11.564.6 ± 16.163.0 ± 15.0Female (%)75.879.096.080.3Disease durations (years)10.4 ± 11.717.6 ± 17.622.6 ± 22.416.3 ± 15.7RF (IU/ml)296.3 ± 1153.8314.9 ± 1037.7262.4 ± 375.9305.9 ± 819.6RF positive ratio (%)81.878.479.275.7Anti CCP antibody (U/ml)221.8 ± 327.2157.8 ± 258.795.9 ± 101.6191.8 ± 250.6Anti CCP antibody positive ratio (%)79.679.672.283.3CRP (U/ml)1.5 ± 2.11.1 ± 2.01.6 ± 1.61.8 ± 2.9MMP-3 (ng/ml)185.7 ± 167.6146.7 ± 122.1190.1 ± 152.6268.0 ± 451.2DAS28-CRP4.3 ± 1.24.1 ± 1.33.9 ± 1.44.4 ± 1.3SDAI21.8 ± 12.221.7 ± 13.118.4 ± 13.023.9 ± 12.8CDAI20.3 ± 11.320.7 ± 12.717.6 ± 12.822.1 ± 12.2HAQ1.1 ± 0.81.2 ± 1.00.9 ± 0.81.4 ± 1.1MTX use (%)69.463.25647.4MTX (mg/day)10.7 ± 3.410.4 ± 3.58.8 ± 3.59.0 ± 4.3Glucocorticoid use (%)29.136.81646.1Glucocorticoid dose (mg/day)3.3 ± 2.13.0 ± 1.53.5 ± 1.95.1 ± 2.8

Conclusion

Drug retention rate of JAKi in treatment of D2TRA group were lower than that of 1st group, 2nd group, and non-D2TRA group. Clinical efficacy of JAKi in D2TRA group were not significantly different to 2nd group and non-D2TRA group. However, HAQ improvement was weak in D2TRA group.

Disclosure of Interests

None declared

Prediction of pathological response to preoperative chemotherapy for pancreatic ductal adenocarcinoma using 2-[18F]-fluoro-2-deoxy-d-glucose positron-emission tomography

AIM

To determine whether the pathological response to preoperative chemotherapy for pancreatic ductal adenocarcinoma (PDAC) can be predicted using 2-[18F]-fluoro-2-deoxy-d-glucose positron-emission tomography (F-18 FDG-PET).

MATERIALS AND METHODS

Twenty-eight patients with PDAC who underwent only neoadjuvant chemotherapy (NAC) before surgery were enrolled in the study. All patients had F-18 FDG-PET examinations before NAC. The resected specimen was pathologically evaluated according to the Classification of Pancreatic Carcinoma (7th edn). Patients were categorised into a non-response group and a response group based on the pathological findings. The non-response group (Grades 1a and 1b) showed ≤50% necrosis in the specimen, while the specimens of the response group (Grades 2-3) showed >50% necrosis. The maximum standardised uptake values (SUVmax) of the tumours on F-18 FDG-PET were measured. The mean values of SUVmax were compared between the two groups. The diagnostic performance of SUVmax in distinguishing the two groups was also evaluated using receiver operating characteristic analysis.

RESULTS

The mean SUVmax of the response group was higher than that of the non-response group (9.00 ± 1.78 versus 4.26 ± 2.35; p<0.001). The optimal cut-off value of SUVmax was 9.28 for distinguishing the two groups. The sensitivity, specificity, and accuracy for the prediction in the response group were 80%, 95.7%, and 92.9%, respectively.

CONCLUSIONS

SUVmax on F-18 FDG-PET may be useful as a biomarker to predict the pathological response to NAC in patients with PDAC.

AB0188 ULTRASONOGRAPHIC RESIDUAL INTRA-ARTICULAR SYNOVITIS IS MORE SEVERE IN RHEUMATOID ARTHRITIS PATIENTS TREATED WITH PREDNISOLONE

Background

The treatment option including biological DMARDs (BIO) and JAK inhibitor (JAK) was expanded, and the number of patients reached to the treatment target are increasing in rheumatoid arthritis (RA). On the other hand, it is also true that some patients are still using prednisolone (PSL). Recently, ultrasound has played a role of sensitive imaging modality in the diagnosis and follow-up of patients with RA. It is known that residual synovitis was found in ultrasound even in patients with clinical remission.

Objectives

We investigated the differences of ultrasonographic intra-articular synovitis findings between treatment drugs in patients with RA.

Methods

From January 2017 to August 2020, 750 RA patients who underwent ultrasound examination were included. A US examination was performed at the bilateral first to fifth metacarpophalangeal (MCP) joints, first interphalangeal (IP) and second to fifth proximal interphalangeal (PIP) joints, wrist joints (three part of radial, medial and ulnar) and first to fifth metatarsophalangeal (MTP) joints, by using HI VISION Ascendus (Hitachi Medical Corporation, Japan) with a multifrequency linear transducer (18-6 MHz). The gray scale and power Doppler findings were assessed by the semi-quantitative method (0-3). All patients were divided into with or without BIO / JAK, methotrexate (MTX) and PSL. Then, patients were matched using the propensity score adjusted for gender, age, RA disease duration, disease activity, CRP value, and MMP-3 value. The total gray scale and power Doppler score (GSUS / PDUS) were compared between treatment drugs of RA by using propensity score matching methods.

Results

The average age of 750 RA patients were 64.5 years and an average disease duration of RA was 13.9 years and females were 581 (77.5%). There were 517 patients (68.9%) treated with BIO/JAK and 233 patients treated without BIO/JAK. The 205 patients in each group were matched. GSUS were 10.6±11.1 vs 9.2±10.4 (p=0.218) and PDUS 7.4±9.2 vs 6.5±9.0 (p=0.328). Ultrasound residual synovitis was not different between with or without BIO/JAK in matched patients. There were 525 patients (70.0%) treated MTX, the average MTX dose was 9.3 mg, and 225 patients treated without MTX. The 203 patients with or without MTX in each group were matched. GSUS were 9.7±10.6 vs 11.4±12.0 (p=0.119) and PDUS 6.6±8.8 vs 8.1±10.1 (p=0.117). Ultrasound residual synovitis was not different between with or without MTX in matched patients. There were 111 patients (14.8%) treated PSL, the average dose was 4.0mg, and 639 patients treated without PSL. The 105 patients with or without PSL in each group were matched. GSUS were 15.7±13.9 vs 11.6±10.6 (p=0.018) and PDUS 11.5±11.4 vs 8.1±9.6 (p=0.021). Ultrasound residual synovitis was more severe treated with PSL than without PSL in matched patients.

Conclusion

In a comparison between RA patients matched backgrounds such as disease activity, there was no difference in ultrasound residual synovitis between patients with or without BIO/JAK and MTX. However, there was significant difference in patients with or without PSL. This suggests that PSL use suppresses clinical symptoms but does not improve synovitis. Thus, it should be noted that joint destruction may progress in patients treating with PSL.

References

[1]Grassi W, Okano T, Di Geso L, Filippucci E. Imaging in rheumatoid arthritis: options, uses and optimization. Expert Rev Clin Immunol. 2015;11:1131-46.

[2]Nguyen H, Ruyssen-Witrand A, Gandjbakhch F, Constantin A, Foltz V, Cantagrel A. Prevalence of ultrasound-detected residual synovitis and risk of relapse and structural progression in rheumatoid arthritis patients in clinical remission: a systematic review and meta-analysis. Rheumatology (Oxford). 2014;53:2110-8.

Acknowledgements

We wish to thank Atsuko Kamiyama, Tomoko Nishimura for clinical assistant, Setsuko Takeda, Emi Yamashita, Yuko Yoshida, Emi Ohtani, Yuka Domae, Asami Yagami, Shingo Washida for their special efforts as a sonographer and collecting data.

Disclosure of Interests

Tadashi Okano Speakers bureau: Asahi Kasei, Astellas, Abbvie, Amgen, Ayumi, Chugai, Daiichi-Sankyo, Eisai, Eli Lilly, Gilead Sciences, Janssen, Kyowa Kirin, Mitsubishi Tanabe, Novartis, Ono, Pfizer, Sanofi, Takeda, UCB, Grant/research support from: Asahi Kasei, Abbvie, Chugai, Eisai, Mitsubishi Tanabe, Kenji Mamoto: None declared, Yutaro Yamada: None declared, Koji Mandai: None declared, Shohei Anno: None declared, Masahiro Tada: None declared, Kentaro Inui Speakers bureau: Daiichi Sankyo Co. Ltd., Mitsubishi Tanabe Pharma, Janssen Pharmaceutical K.K., Astellas Pharma Inc., Takeda Pharmaceutical Co. Ltd., Ono Pharmaceutical Co. Ltd., Abbvie GK, Pfizer Inc., Eisai Co.,Ltd., Chugai Pharmaceutical Co., Ltd., Grant/research support from: Janssen Pharmaceutical K.K., Astellas Pharma Inc., Sanofi K.K., Abbvie GK, Takeda Pharmaceutical Co. Ltd., QOL RD Co. Ltd., Mitsubishi Tanabe Pharma, Ono Pharmaceutical Co. Ltd., Eisai Co.,Ltd.,, Tatsuya Koike Speakers bureau: Takeda Pharmaceutical, Mitsubishi Tanabe Pharma Corporation, Chugai Pharmaceutical, Eisai, Abbott Japan, Teijin Pharma, Banyu Pharmaceutical and Ono Pharmaceutical, Hiroaki Nakamura: None declared

AB0340 SHORTENING THE DOSING INTERVAL OR DOSE ESCALATION OF BIOLOGICAL DMARDs SUPPRESSED RESIDUAL ULTRASOUND SYNOVITIS AND JOINT DESTRUCTION IN PATIENTS WITH RHEUMATOID ARTHRITIS -STARBOARD STUDY-

Background

In patients with rheumatoid arthritis (RA) who have residual synovitis even after using biological disease modified anti-rheumatic drug (bDMARDs), joint destruction may progress1,. The enhanced treatment such as shortening the dosing interval or dose escalation of bDMARDs are recommended for these patients, if allowed in package inserts 2, 3.

Objectives

We investigated the effects of enhanced treatment in RA patients with residual synovitis under treatment with standard dose of bDMARDs.

Methods

Forty RA patients treated with standard dose of infliximab, tocilizumab or golimumab were included in this study. Ultrasound (US) examination was performed at the bilateral first to fifth metacarpophalangeal (MCP) joints, first interphalangeal (IP) and second to fifth proximal interphalangeal (PIP) joints, wrist joints (three parts of radial, medial and ulnar) and first to fifth metatarsophalangeal (MTP) joints, by using HI VISION Ascendus (Hitachi Medical Corporation, Japan) with a multifrequency linear transducer (18-6 MHz). Residual synovitis was defined as Power Doppler score (PD) ≥2. In patients with residual synovitis, we recommended enhanced treatment. The patients were divided into 3 groups, PD≥2/ET+ group (patients agreed enhanced treatment), PD≥2/ET- group (patients rejected enhanced treatment), and PD<2 group. We assessed ultrasound (PD score), laboratory data (CRP, MMP-3), disease activity (Simplified Disease Activity Index; SDAI), physical function (Health Assessment Questionnaire; HAQ), and joint destruction (modified Total Sharp Score; mTSS) at baseline and 1-year follow-up.

Results

There were 9 patients in PD≥2/ET+ group and 31 patients in PD<2 group. PD≥2/ET+ group had significantly higher SDAI (p=0.027), MMP-3 (p=0.005), and PD (p<0.001) at baseline compared with PD<2 group, but their MMP-3 (p=0.019) and PD (p=0.042) were significantly decreased over 1 year. PD≥2/ET+ group had joint destruction before ET (p=0.022), but it was suppressed after ET and there was no significance in change in mTSS compared with PD<2 group (p>0.99) (Figure 1).

Figure 1.

Disease activity, ultrasound assessment and radiographic change from baseline (BL) to 1-year follow-up in RA patients with residual synovitis who had enhanced treatment (PD≥2/ET+) and those without active synovitis (PD<2).

*Each parameter at BL and 1-year was statistically analyzed by Wilcoxin signed rank test only in PD≥2/ET+ group.

**Difference in two groups at BL was statistically analyzed by Student t test or Mann-Whitney U test.

SDAI: simplified disease activity index, HAQ: health assessment questionnaire, PD: Power Doppler, MMP-3: matrix metalloproteinase 3, mTSS: modified Total Sharp Score.

Conclusion

In RA patients with the residual synovitis under treatment with standard dose of bDMARDs, enhanced treatment decreased the synovitis and suppressed the joint destruction.

References

[1]Nguyen H, Ruyssen-Witrand A, Gandjbakhch F, Constantin A, Foltz V, Cantagrel A. Prevalence of ultrasound-detected residual synovitis and risk of relapse and structural progression in rheumatoid arthritis patients in clinical remission: a systematic review and meta-analysis. Rheumatology (Oxford). 2014 Nov;53(11):2110-8.

[2]Ogata A, Tanaka Y, Ishii T, Kaneko M, Miwa H, Ohsawa S; SHINOBI study group. A randomized, double-blind, parallel-group, phase III study of shortening the dosing interval of subcutaneous tocilizumab monotherapy in patients with rheumatoid arthritis and an inadequate response to subcutaneous tocilizumab every other week: Results of the 12-week double-blind period. Mod Rheumatol. 2018 Jan;28(1):76-84.

[3]Takeuchi T, Miyasaka N, Tatsuki Y, Yano T, Yoshinari T, Abe T, Koike T. Baseline tumour necrosis factor alpha levels predict the necessity for dose escalation of infliximab therapy in patients with rheumatoid arthritis. Ann Rheum Dis. 2011 Jul;70(7):1208-15.

Disclosure of Interests

None declared

AB1096 THE INFLUENCE OF THE BEHAVIORAL RESTRICTION OF COVID-19 PANDEMIC FOR THE FRAILTY OF PATIENTS WITH RHEUMATOID ARTHRITIS

Background

We previously reported the prevalence of frailty and relation of disease activity at patients with rheumatoid arthritis (RA)1. The behavioral restriction of COVID-19 pandemic influenced for the lifestyle of people included patients with RA.

Objectives

The relationship between the behavioral restriction of COVID-19 pandemic and frailty was investigated.

Methods

We used the date from prospective observational study (CHIKARA study: UMIN000023744). 70 from 100 patients with RA were followed-up and evaluated the frailty and subcategories (social, physical, mental, nutrition, and cognitive) by frailty checklist. The prevalence of frailty and the change of exercise and daily life activities by visual analog scale were investigated at pre- and post-behavioral restriction. The correlation of frailty and change of amount of exercise and daily life activity examined by univariate analysis.

Results

Mean age was 69.7 years (women n=57, men n=13). The prevalence of frailty at post-behavioral restriction increased compared that at pre-behavioral restriction (post:35.8% vs pre:30.0%). Especially, cognitive and total score at post-behavioral restriction increased significantly. The rate of decrease of exercise by <25%, 26~50%, and 51%< were 70%, 21%, and 9%, respectively (mean:20% decrease). Whereas, the rate of decrease of daily life activities by <25%, 26~50%, and 51%< were 37%, 27%, and 36%, respectively (mean:44% decrease). The change of exercise was significantly negatively correlated with the change of nutrition (R=-0.245, P=0.041) at Table 1. There was no correlation between the change of daily life activities and subcategories.

Table 1.

Univariate analysis of the changes in daily living activities or exercise and those in frailty and subcategories

Change of daily living activitiesChange of exerciseR valueP valueR valueP valueΔ Social0.0990.417-0.0060.962Δ Physical0.1820.130-0.0050.965Δ Mental-0.2000.097-0.2340.051Δ Nutrition-0.2040.091-0.2450.041Δ Cognitive-0.0870.476-0.0340.778Δ Total-0.0910.454-0.1780.140

Δ, change from pre- to post-behavioral restriction.

Analyzed by Spearman’s rank correlation coefficient

Conclusion

The exercise slightly decreased and the daily life activities decreased almost 50% by the behavioral restriction of COVID-19 pandemic. The prevalence of frailty increased 5.8%, and cognitive and total score were significantly high at post-behavioral restriction of COVID-19 pandemic. The decrease of exercise correlated with the worse of nutrition.

References

[1]Tada M, Yamada Y, Mandai K, Hidaka N. Correlation between frailty and disease activity in patients with rheumatoid arthritis: Data from the CHIKARA study. Geriatr Gerontol Int 2019; 19:1220-5.

Disclosure of Interests

None declared

POS0290 THE EFFECTS OF TREATMENT RESPONSE AND RISK FACTOR TO INHIBIT THE CLINICAL RESPONSE IN PATIENTS WITH DIFFICULT-TO-TREAT RHEUMATOID ARTHRITIS TREATED WITH IL-6 RECEPTOR INHIBITOR, ABATACEPT AND JAK INHIBITOR

Background

Recently, the disease activity of rheumatoid arthritis (RA) was improved due to the ‘treat-to-target’ strategy. However, some patients remain various symptoms despite recommended treatment was performed. Then, the term of ‘difficult-to-treat RA (D2TRA)’ is widely recognized. It is unknown how the difference of type of biological disease-modifying anti rheumatic dugs (bDMARDs)/Janus kinase inhibitor (JAKi) will affect clinical efficacy in patients with D2TRA. Moreover, the risk factor to inhibit the clinical response in patients with D2TRA is unknown.

Objectives

The aim of this study was to evaluate the treatment response in patients with D2TRA who were treated with interleukin 6 receptor inhibitor (IL-6Ri), abatacept and JAKi.

Methods

This study used the multicenter database included 673 RA patients treated with bDMARDs/JAKi (tocilizumab 240, sarilumab 67, abatacept 146, tofacitinib 101, baricitinib 83, upadacitinib 20, peficitinib 14, filgotinib 2). Two hundred forty-two patients were treated as first line bDMARDs/JAKi (IL-6Ri 117, abatacept 63, JAKi 62), 211 patients were treated as second line bDMARDs/JAKi (IL-6Ri 117, abatacept 37, JAKi 57), 220 patients were treated as third and more bDMARDs/JAKi. In these 220 patients, 82 patients did not meet D2TRA criteria (IL-6Ri 42, abatacept 15, JAKi 25) and 138 patients met D2TRA criteria (IL-6Ri 31, abatacept 31, JAKi 76). In all patients, we analyzed 138 patients with D2TRA (113 female, mean age was 63.1 ± 13.7 years). Drug retention rate and effectiveness of bDMARDs/JAKi in patients with D2TRA were evaluated for 24 weeks. Multivariate linear regression analysis was performed to clarify the risk factors to inhibit the clinical response.

Results

Drug retention rate of patients with D2TRA at 24 weeks was 67.7% in IL-6Ri group, 74.2% in abatacept group, 61.8% in JAKi group. Drug retention rate in patients with D2TRA was not different between groups (IL-6Ri vs abatacept: p=0.86, IL-6Ri vs JAKi group: p=0.39, abatacept vs JAKi group: p=0.33). DAS28-CRP at 4, 12, 24 weeks decreased in all group (Figure 1). Abatacept showed lower improvement ratio of DAS28-CRP at 24 weeks compared to IL-6Ri group (IL-6Ri vs abatacept: p<0.01, IL-6Ri vs JAKi: p=0.1, abatacept vs JAKi: p=0.07). Good responder (defined as decrease in DAS28-CRP score > 1.2 with a score < 3.2) was 52.4% patients in IL-6Ri, 17.4% patients in abatacept, 29.8% patients in JAKi. SDAI and CDAI at 4, 12, 24 weeks decreased in all group (Figure 1). There were no diferences between the groups in improvement ratio of SDAI (IL-6Ri vs abatacept: p=0.11, IL-6Ri vs JAKi: p=0.81, abatacept vs JAKi: p=0.08) and CDAI (IL-6Ri vs abatacept: p=0.31, IL-6Ri vs JAKi: p=0.82, abatacept vs JAKi: p=0.13) at 24 weeks. HAQ was 1.42, 1.15, 1.39 at baseline, 1.27, 1.07, 1.22 at 4 weeks, 1.17, 1.07, 1.17 at 12 weeks, 1.26, 1.06, 1.14 at 24 weeks in IL-6Ri group, abatacept and JAKi, respectively. Multivariate linear regression analysis revealed that high HAQ (β=0.28, p=0.02) and high dosage of glucocorticoid (β=0.67, p<0.01) inhibited the improvement of DAS28-CRP. Type of bDMARDs/JAKi (β=-0.09, p=0.36) did not affect the DAS28-CRP improvement for 24 weeks.

Table 1.

Multivariate linear regression analysis of risk factor to inhibit the clinical response in patients with D2TRA.

β95% CIpAge (years)-0.037-0.025, 0.0170.74male-0.047-0.788, 0.4860.64Disease durations (years)-0.048-0.028, 0.0170.63RF (IU/ml)-0.082-0.0004, 0.00020.41Anti CCP antibody (U/ml)0.111-0.0005, 0.0020.26DAS28-CRP-0.063-0.265, 0.1420.55HAQ0.2790.059, 0.7170.02MTX (mg/day)0.136-0.018, 0.0810.21Glucocorticoid dose (mg/day)0.6690.174, 0.324< 0.01Type of bDMARDs/JAKi-0.088-0.415, 0.1510.36

Conclusion

Drug retention rate and clinical efficacy of D2TRA patients were not different among IL-6Ri, abatacept and JAKi. DT2RA patient with functional disorder and high dosage of glucocorticoid were risk factor to inhibit the clinical response.

Disclosure of Interests

None declared

OP0133 THE DECREASE OF MUSCLE MASS BY THE BEHAVIORAL RESTRICTION OF COVID-19 PANDEMIC IN PATIENTS WITH RHEUMATOID ARTHRITIS

Background

We previously reported the prevalence of sarcopenia and body compositions at patients with rheumatoid arthritis (RA)1. The behavioral restriction of COVID-19 pandemic influenced for the lifestyle of people included patients with RA.

Objectives

The change of exercise and daily life activity of patients with RA were investigated and body composition and muscle function were compared pre- and post-behavioral restriction.

Methods

We used the date from prospective observational study (CHIKARA study: UMIN000023744). 70 from 100 patients with RA were followed-up and evaluated the change of exercise and daily life activity by visual analog scale. They were measured the muscle mass, fat mass, basal metabolic rate by body composition analyzer and grip strength as muscle function. The relationship between the change of exercise and daily life activity and body composition was investigated by univariate analysis.

Results

Mean age was 69.7 years (women n=57, men n=13). The rate of decrease of exercise by <25%, 26~50%, and 51%< were 70%, 21%, and 9%, respectively (mean:20% decrease). Whereas, the rate of decrease of daily life activities by <25%, 26~50%, and 51%< were 37%, 27%, and 36%, respectively (mean:44% decrease). Muscle mass at post-behavioral restriction decrease significantly compared that at pre-behavioral restriction activities (34.0kg vs 34.7kg, P<0.001). Fat mass at post-behavioral restriction increase significantly compared that at pre-behavioral restriction (16.2kg vs 15.5kg, P=0.014). Grip strength at post-behavioral restriction decrease significantly compared that at pre-behavioral restriction (16.2kg vs 17.2kg, P=0.026). The change of exercise was significantly positively correlated with the change of muscle mass and basal metabolic rate (R=0.273, P=0.021 and R=0.256, P=0.033, relatively) at Table 1. Whereas, the change of daily living activities was not significantly correlated with the change of muscle mass and muscle function.

Table 1.

Univariate analysis of the changes in daily living activities or exercise and those in body composition or muscle function

Change of daily living activitiesChange of exerciseR valueP valueR valueP valueΔ Weight (kg)-0.1230.311-0.1310.279Δ BMI (kg/m2)-0.1080.397-0.1130.345Δ Muscle mass (kg)0.1400.3110.2730.021Δ Fat mass (kg)-0.0610.614-0.0750.539Δ Fat percentage (%)-0.0030.982-0.0180.884Δ Basal metabolic rate (kcal)0.2010.0950.2560.033Δ Grip strength (kg)0.1170.3360.0370.762Δ Walk speed (m/s)0.1690.1610.1390.250

Δ, change from pre- to post-behavioral restriction; BMI, body mass index

Analyzed by Spearman’s rank correlation coefficient

Conclusion

Muscle mass and grip strength decrease and fat mass increase in patients with RA by the behavioral restriction of COVID-19 pandemic. Muscle mass and basal metabolic rate decrease in patients without exercise habits. Maintenance of muscle mass might be important during the COVID-19 pandemic.

References

[1]Tada, M., Yamada, Y., Mandai, K. & Hidaka, N. Matrix metalloprotease 3 is associated with sarcopenia in rheumatoid arthritis - results from the CHIKARA study. Int J Rheum Dis 21, 1962-1969, doi:10.1111/1756-185X.13335 (2018).

Disclosure of Interests

None declared

AB0405 JAK INHIBITORS IMPROVE PATIENT-REPORTED OUTCOMES SUCH AS PAIN AND HAQ EARLIER THAN ANTI-IL-6 INHIBITORS

Background

Clinical feature of Janus kinase (JAK) inhibitor is recognized as not only suppress inflammation but also improve patient-reported outcomes (PRO) such as pain and health assessment questioner (HAQ) in patients with rheumatoid arthritis (RA). This representative clinical feature was known as a results of phase 3 trial compared to TNF inhibitor. One of the mechanisms of JAK in RA is to suppresses interleikin-6 (IL-6). However, the effect for PRO in JAK inhibitor compared to IL-6 inhibitor have not been known.

Objectives

We investigated the effect for patient-reported outcomes such as pain and HAQ in patients with RA treated with JAK inhibitor compared to IL-6 inhibitor.

Methods

This study was analysed a multicenter database included RA patients treated with biological disease-modifying anti rheumatic dugs (bDMARDs) and JAK inhibitors. In 307 patients treated with IL-6 inhibitor (tocilizumab 240 and sarilumab 67) and 220 patients with JAK inhibitor (tofacitinib 101, baricitinib 83, upadacitinib 20, peficitinib 14 and filgotinib 2), 155 patients were treated as first-line bDMARDs/JAK inhibitor (IL-6R inhibitor 104 and JAK inhibitor 51). In this first-line patients, patients treated with IL-6R inhibitor and JAK inhibitor were matched using the propensity score adjusted for gender, age, RA disease duration, baseline charactristics of disease activity, CRP level, and MMP-3 level. The beaseline data and the change of clinical and laboratory data at 4, 12 and 24 weeks were compared between IL-6 inhibitor and JAK inhibitor.

Results

Thirty-six patients in each group were matched and analyzed. The average age was 62.4 and 62.6 years and the average disease duration of RA was 13.2 and 10.1 years in IL-6 inhibitor and JAK inhibitor. The baseline characteristics were not significantly different in both groups. At week 4, tender joint count (TJC) was significantly improved in JAK inhibitor than IL-6 (IL-6: -1.86 vs JAK: -4.12, p= 0.036) and HAQ was significantly improved in JAK inhibitor than IL-6 (IL-6: -0.04 vs JAK: -0.27, p= 0.041). Moreover, Clinical Disease Activity Index (CDAI) was also improved in JAK inhibitor than IL-6 (IL-6: -6.6 vs JAK: -10.9, p= 0.026) at week 4. However, pain VAS and patient global VAS were not significantly different in each group in week4. TJC, HAQ and CDAI was not different in both groups at week 12 and week 24. On the other hand, ESR was significantly decreased in IL-6 inhibitor than JAK inhibitor at week 4, 12 and 24 (IL-6: -26.6 vs JAK: -14.1, p=0.018 at week 4, IL-6: -32.7 vs JAK: -16.5 p=0.004 at week 12, IL-6: -31.3vs JAK: -17.7 p=0.014 at week 24).

Conclusion

In a comparison between IL-6 inhibitor and JAK inhibitor as a first-line molecular-targeted drug matched baseline charactristics of disease activity, TJC and HAQ was improved in JAK inhibitor earlier than IL-6 inhibitors. JAK inhibitor suppress multi cytokine that might be the reason why JAK inhibitor improve pain. Improvement of patient reported outcome in JAK inhibitor was found also in comparison with IL-6 inhibitor.

References

[1]Taylor PC, Keystone EC, van der Heijde D, et al. Baricitinib versus Placebo or Adalimumab in Rheumatoid Arthritis. N Engl J Med. 2017;376:652-62.

[2]Fleischmann R, Pangan AL, Song IH, et al. Upadacitinib Versus Placebo or Adalimumab in Patients with Rheumatoid Arthritis and an Inadequate Response to Methotrexate: Results of a Phase III, Double-Blind, Randomized Controlled Trial. Arthritis Rheumatol. 2019;71:1788-1800.

Acknowledgements

We wish to thank Atsuko Kamiyama and Tomoko Nishimura for clinical assistant, and all member of Team RA.

Disclosure of Interests

Tadashi Okano Speakers bureau: Asahi Kasei, Astellas, Abbvie, Amgen, Ayumi, Chugai, Daiichi-Sankyo, Eisai, Eli Lilly, Gilead Sciences, Janssen, Kyowa Kirin, Mitsubishi Tanabe, Novartis, Ono, Pfizer, Sanofi, Takeda, UCB, Grant/research support from: Asahi Kasei, Abbvie, Chugai, Eisai, Mitsubishi Tanabe, Tatsuya Koike Speakers bureau: Takeda Pharmaceutical, Mitsubishi Tanabe Pharma Corporation, Chugai Pharmaceutical, Eisai, Abbott Japan, Teijin Pharma, Banyu Pharmaceutical and Ono Pharmaceutical, Kentaro Inui Speakers bureau: Daiichi Sankyo Co. Ltd., Mitsubishi Tanabe Pharma, Janssen Pharmaceutical K.K., Astellas Pharma Inc., Takeda Pharmaceutical Co. Ltd., Ono Pharmaceutical Co. Ltd., Abbvie GK, Pfizer Inc., Eisai Co.,Ltd., Chugai Pharmaceutical Co., Ltd., Grant/research support from: Janssen Pharmaceutical K.K., Astellas Pharma Inc., Sanofi K.K., Abbvie GK, Takeda Pharmaceutical Co. Ltd., QOL RD Co. Ltd., Mitsubishi Tanabe Pharma, Ono Pharmaceutical Co. Ltd., Eisai Co.,Ltd., Masahiro Tada: None declared, Kenji Mamoto: None declared, Yutaro Yamada: None declared, kazuki Orita: None declared, Koji Mandai: None declared, Shohei Anno: None declared, Takahiro Iida: None declared, Hiroaki Nakamura: None declared

AB0262 PATIENTS WITH RHEUMATOID ARTHRITIS WHO DEVELOP SARCOPENIA FALL FREQUENTLY: 5-YEAR DATA FROM THE CHIKARA STUDY

Background

Patients with rheumatoid arthritis (RA) are likely to have sarcopenia due to decreased muscle mass and physical function. Some patients develop sarcopenia even if disease activity is well-controlled. We previously reported that 13.2% of RA patients without sarcopenia at baseline developed sarcopenia over a year1.

Objectives

The aim was to longitudinally investigate sarcopenia status and the characteristics of RA patients using data from the prospective, observational CHIKARA study.

Methods

Body composition, laboratory data, disease activity, physical function (HAQ), treatment, and history of falls and fractures were investigated in 100 RA patients who participated in the CHIKARA study at baseline and at 5 years. They were divided into 4 groups depending on their sarcopenia status: no sarcopenia developed (N group; sarcopenia absent at baseline and 5 years); sarcopenia developed (S group; sarcopenia absent at baseline, but present at 5 years); cured (C group; sarcopenia present at baseline, but absent at 5 years); and persistent (P group; sarcopenia present at baseline and at 5 years).

Results

Seventy RA patients completed the survey. There were no differences among the 4 groups in disease activity, physical function, and treatment. The N group, accounting for 67.1% of all patients, was young and had high body mass index, muscle mass, fat mass, estimated bone mass, and body metabolic rate at baseline. On the other hand, the S group, accounting for 4.3% of all patients, fell significantly more frequently (p=0.035), 3.3 times during 5 years. The P group, accounting for 18.6% of all patients, had significantly higher MMP-3 at baseline (p=0.006). The C group accounted for 10.0% of all patients (Table 1).

Table 1.

Characteristics of 77 RA patients by sarcopenia status at baseline and at 5-year follow-up

no development (n=47)development (n=3)cured (n=7)persisted (n=13)p valueage, years63 (57.5, 70)76 (74.5, 81)66 (54, 70)73 (65, 82)0.006disease duration, years6.5 (1.1, 10.7)15.2 (14.9, 20.7)11.4 (7.2, 14.8)3.5 (1.1, 6.5)0.021MTX dose, mg/day8.1 ± 3.76.0 ± 2.07.4 ± 3.86.2 ± 4.80.406biologics use, %36.266.728.623.10.513GC use, %23.4028.615.40.701average GC dose, mg/day3.5 ± 1.103.7 ± 1.86.3 ± 1.80.833CRP, mg/dl0.1 (0.04, 0.18)0.04 (0.04, 0.23)0.2 (0.12, 0.47)0.19 (0.08,0.82)0.22MMP-3, ng/ml62.2 (50.3, 98.6)58.9 (47.8, 71.3)74.9 (58.3,147.2)160 (90.8,262)0.006DAS28ESR3.34 ± 0.914.11 ± 0.723.36 ± 1.383.79 ± 1.200.355mHAQ0.25 (0, 0.5)0.63 (0.56, 1.25)0.87 (0.25, 1.0)0.25 (0.13, 0.75)0.132BMI, kg/m223.22 ± 3.5121.4 ± 2.2518.69 ± 2.0819.56 ± 2.39<0.001SMI, kg/m26.73 ± 0.76.1 ± 0.25.51 ± 0.145.79 ± 0.6<0.001fat percentage, %30.39 ± 8.7730.03 ± 9.1225.04 ± 6.2323.75 ± 6.560.051estimated bone mass, kg2.2 (2, 2.4)1.9 (1.75, 1.95)1.6 (1.55, 1.9)1.9 (1.7, 2.2)0.001BMR, kcal1101 (1051, 1198)986 (934, 1010)896 (872, 994)978 (902,1107)<0.001ΔDAS28ESR-0.15 ± 0.84-0.43 ± 1.730.04 ± 0.89-0.59 ± 1.330.445ΔSMI, kg/m2-0.06 ± 0.34-0.38 ± 0.570.25 ± 0.220.08 ± 0.420.038fall, times1.63.331.290.380.045

Data are shown as mean ± standard deviation (SD) or median (25th, 75th percentile).

GC: glucocorticoids, MMP-3: matrix metalloproteinase 3, DAS: disease activity score, HAQ: health assessment questionnaire, BMI: body mass index, SMI: skeletal muscle mass index, BMR: body metabolization rate, Δ:change during 5 years.

Conclusion

Overall, 4.3% of RA patients developed sarcopenia and fell frequently during 5-year follow-up. Patients who develop sarcopenia require special care because they are at high risk of falls.

References

[1]Y Yamada, M Tada, K Mandai et al. Glucocorticoid use is an independent risk factor for developing sarcopenia in patients with rheumatoid arthritis: from the CHIKARA study. Clin Rheumatol 2020 Jun;39(6):1757-1764.

Disclosure of Interests

None declared

AB0387 THE RELATIONSHIP BETWEEN JAK INHIBITORS AND CREATINE KINASE ELEVATION IN PATIENTS WITH RHEUMATOID ARTHRITIS: A REAL-WORLD CLINICAL STUDY

Background

Some cases of creatine kinase (CK) elevation caused by Janus kinase (JAK) inhibitor treatment for rheumatoid arthritis (RA) have been reported in clinical trials1. However, the frequency and patients’ background characteristics in clinical practice are unknown.

Objectives

The correlation between JAK inhibitor treatment for RA and changes in CK levels in clinical practice were investigated using a multicenter database.

Methods

The multicenter database of JAK inhibitors was used, and 103 (tofacitinib 46, baricitinib 44, upadacitinib 11, peficitinib 1, filgotinib 1) of 265 RA patients were followed up at 24 weeks, and their CK levels were evaluated. The time-dependent change of CK was evaluated by sex and analyzed by the Wilcoxon signed-rank test. The percentage abnormal from the standard titer was calculated. The factors related to an elevated CK at 24 weeks were investigated using patients’ background characteristics at the time of starting JAK inhibitors by univariate analysis.

Results

Women accounted for 85.4% of the patients, the median age was 68 years, disease duration was 15 years, and the mean DAS28ESR was 5.00. The CK levels of both men and women were significantly elevated at 4 weeks and maintained until 24 weeks (men, women: 63, 62 (0 weeks), 101, 95 (4 weeks), 119, 96 (12 weeks), 155, 99 (24 weeks), U/L, P<0.001) (Figure 1). The percentage abnormal was also significantly increased at 4 weeks and maintained until 24 weeks (5.8% (0 weeks), 20.7% (4 weeks), 26.3% (12 weeks), 24.3% (24 weeks), P=0.002). The factors significantly positively related to elevated CK levels at 24 weeks were male, CK, creatinine, and lactate dehydrogenase (LDH), and stage, class, modified health assessment questionnaire, estimated glomerular filtration rate (eGFR), and glucocorticoid use were significantly negatively correlated (Table 1). There were no significant differences in CK elevation among the agents.

Table 1.

Characteristics at the time of starting JAK inhibitors related to elevated creatine kinase levels at 24 weeks

UnivariateData at stating JAK inhibitorsR valueP valueCreatine kinase0.653<0.001Gender, men0.2470.012Steinbrocker stage-0.2150.039Steinbrocker class-0.2770.008modified health assessment questionnaire-0.2680.008Creatinine0.2890.003eGFR-0.2310.019LDH0.2010.041Glucocorticoid use-0.4090.008

Analyzed by Spearman rank correlation coefficient

Figure 1.

Time-dependent changes of CK in all RA patients

Conclusion

CK was significantly elevated at 4 weeks and maintained until 24 weeks. However, no patients complained of muscle pain and stopped JAK inhibitors. Patients with high CK, low eGFR, high LDH, or maintained activities of daily living at the time of starting JAK inhibitors tended to have high CK levels at 24 weeks.

References

[1]Fleischmann, R. et al. Upadacitinib Versus Placebo or Adalimumab in Patients With Rheumatoid Arthritis and an Inadequate Response to Methotrexate: Results of a Phase III, Double-Blind, Randomized Controlled Trial. Arthritis & rheumatology (Hoboken, N.J.) 71, 1788-1800, doi:10.1002/art.41032 (2019).

Disclosure of Interests

None declared

POS1146 ROMOSOZUMAB INCREASE BONE MINERAL DENSITY AT LUMBAR AND FEMORAL IRRESPECTIVE OF PREOSTEOPOROSIS TREATMENT, HISTORY OF FRAGILITY FRACTURE AND COMBINATION OF VITAMIN D

Background

Romosozumab, a monoclonal antibody that binds sclerostin, increases bone formation and decreases bone resorption. Romosozumab has an excellent therapeutic effect on patients with osteoporosis. However, there are few reports investigated the efficacy and the effect of various factors relative to osteoporosis in real-world.

Objectives

We evaluated bone mineral density (BMD) and bone metabolism marker (BMM) change in osteoporosis patients treated with romosozumab, and assessed the effect of various factors, such as preosteoporosis treatment, history of fragility fracture and combination of vitamin D.

Methods

This study included 141 osteoporosis patients (132 female, mean age: 78.8 ± 7.5 years, mean hight: 151.1 ± 7.5 cm, mean weight: 50.9 ± 8.9 kg) treated with romosozumab. BMD measurements using dual energy X-ray absorptiometry (DXA) and BMM measurements using N-terminal propeptide of type 1 collagen (P1NP) were evaluated at 0, 4, 6, and 12 months after treatment. DXA were performed at the lumbar spine (n=92), at proximal femoral and femoral neck (n=92), and at distal third radius (n=49). We evaluated the influence of preosteoporosis treatment, history of fragility fracture and combination of vitamin D for BMD change.

Results

BMD at lumbar spine (5.2%: p<0.01, 9.2%: p<0.01, 10.8%: p<0.01), proximal femoral (1.3%: p=0.02, 2.8%: p<0.01, 4.5%: p<0.01) and femoral neck (2.0%: p=0.03, 2.7%: p=0.06, 5.0%: p=0.01) were significantly increased at 4, 8, 12 months after treatment. BMD at distal third radius (-1.5%: p<0.01, -0.8%: p=0.17, -1.0%: p=0.13) were not increased at 4, 8, 12 months after treatment. P1NP chane were 63% (p<0.01), 6.4% (p=0.55), -2.3% (p=0.2) at 4, 8, 12 months after treatment. There were no significant differences in 1 year improvement ratio of BMD at lumbar spine, proximal femoral and femoral neck between 38 patients with pretreatment of osteoporosis and 54 patients without pretreatment of osteoporpsis (13.5 vs 9.5%: p=0.1, 4.9 vs 4.4%: p=0.7, 6.1 vs 4.6%: p=0.67), between 33 patients with a history of fragility fracture and 59 patients without a history of fragility fracture (7.3 vs 11.7%: p=0.42, 0.8 vs 5.5%: p=0.08, -0.7 vs 6.6%: p=0.14), between 50 patients with romosozumab alone and 42 patients with romosozumab plus vitamin D (11.3 vs 10.0%: p=0.93, 4.1 vs 5.3%: p=0.59, 6.8 vs 2.3%: p=0.47). There were no significant differences in 1 year improvement ratio of BMD at distal third radius between 33 patients with pretreatment of osteoporosis and 16 patients without pretreatment of osteoporpsis (-1.1 vs -0.9%: p=0.63), between 31 patients with a history of fragility fracture and 18 patients without a history of fragility fracture (-1.5 vs -0.5%: p=0.3).

Conclusion

Romosozumab improved BMD at lumbar and femoral independently regardless of preosteoporosis treatment, history of fragility fracture and combination of vitamin D.

References

[1]Felicia Cosman et al. Romosozumab Treatment in Postmenopausal Women with Osteoporosis. N Engl J Med 2016; 375:1532-1543, DOI: 10.1056/NEJMoa1607948

Disclosure of Interests

None declared

Prevalence of Frailty and Prefrailty in People With Human Immunodeficiency Virus Aged 50 or Older: A Systematic Review and Meta-Analysis

Background

With effective antiretroviral therapy, there is an emerging population of adults aged 50 years or older with human immunodeficiency virus (HIV). Frailty is an increasingly recognized clinical state of vulnerability associated with disability, hospitalization, and mortality. However, there is a paucity of large studies assessing its prevalence in people with HIV (PWH) aged 50 or older.

Methods

PubMed was systematically searched for studies published between January 2000 and August 2020 reporting the prevalence of frailty in PWH aged 50 or older. The pooled prevalence of frailty and prefrailty was synthesized using a random-effects meta-analysis.

Results

Of the 425 studies identified, 26 studies were included in the analysis, with a total of 6584 PWH aged 50 or older. The included studies were published between 2012 and 2020, and all studies used the Fried frailty phenotype to define frailty. The overall pooled prevalence of frailty and prefrailty was 10.9% (95% confidence interval [CI], 8.1%-14.2%) and 47.2% (95% CI, 40.1%-54.4%), respectively. A high degree of heterogeneity was observed (I2 = 93.2%). In the subgroup analysis, HIV-related variables and other demographic variables were examined, and heterogeneity disappeared only in the group of a longer duration since HIV diagnosis (I2 = 0%).

Conclusions

The pooled prevalence of frailty and prefrailty defined by the Fried frailty phenotype was assessed in PWH aged 50 or older. Findings from this study quantified the proportion of this specific population with this common geriatric syndrome. Future studies identifying effective strategies for frailty screening and intervention are required for this vulnerable population.

Gemtuzumab Ozogamicin Followed by Unrelated Cord Blood Transplantation With Reduced-intensity Conditioning for a Child With Refractory Acute Promyelocytic Leukemia

There is no established treatment for patients with acute promyelocytic leukemia (APL) refractory to targeted therapies with all-trans retinoic acid (ATRA) and/or arsenic trioxide (ATO). We report here a case of an 8-month-old girl with APL who failed standard ATRA-combined chemotherapy. Although molecular remission was achieved after introducing ATRA/ATO combination therapy, molecular relapse occurred during the ATO consolidation courses. Subsequent molecular remission was rapidly achieved after administering 2 doses of gemtuzumab ozogamicin. She was successfully treated with unrelated cord blood transplantation using reduced-intensity conditioning. Gemtuzumab ozogamicin might be a preferable choice for patients with APL refractory to standard therapy.

Sex Differences in Social Cognition and Association of Social Cognition and Neurocognition in Early Course Schizophrenia

Background

Both impairment and sex differences in social cognition and neurocognition have been documented in schizophrenia. However, whether sex differences exist in the association between social cognition and neurocognition are not known. We aimed to investigate the contribution of areas of neurocognition to theory of mind (ToM) and hostility bias, representing social cognition, according to sex in early course schizophrenia.

Methods

In this cross-sectional study, we assessed neurocognition using the Japanese version of the Brief Assessment of Cognition in Schizophrenia (BACS) and assessed the ToM and hostility bias subdomains of social cognition using the Social Cognition Screening Questionnaire (SCSQ) in 131 participants (65 female, 66 male) diagnosed with schizophrenia within 5 years of onset. Sex differences were analyzed using t-tests. The associations of neurocognitive subdomains with ToM and hostility bias according to sex were analyzed using multiple regression analysis. Results were adjusted by age, estimated premorbid intelligence quotient, and symptomatology.

Results

No sex differences were found in ToM (p = 0.071) or hostility bias (p = 0.057). Higher verbal fluency was significantly associated with higher ToM in females (p < 0.01), whereas higher executive function was significantly associated with higher ToM in males (p < 0.05). Higher verbal fluency was significantly associated with lower hostility bias in females (p < 0.05), whereas neurocognition and hostility bias were not significantly associated in males.

Conclusion

The results suggest that neurocognition associated with social cognition differ according to sex. These differences should be considered for more effective treatment of social cognition.