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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Med+Virol
2020 ; 92
(11
): 2516-2522
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Clinical outcomes in COVID-19 patients treated with tocilizumab: An individual
patient data systematic review
#MMPMID32436994
Antwi-Amoabeng D
; Kanji Z
; Ford B
; Beutler BD
; Riddle MS
; Siddiqui F
J Med Virol
2020[Nov]; 92
(11
): 2516-2522
PMID32436994
show ga
BACKGROUND: Current evidence suggests an important role of the interleukin-6
(IL-6) pathway in severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2)-related cytokine release storm in severely ill coronavirus disease
2019 (COVID-19) patients. Inhibition of the IL-6 pathway with tocilizumab has
been employed successfully in some of these patients but the data is mostly
consistent of case reports and series. METHODS: We performed a systematic search
of PubMed, Embase, and Medline from 22nd April 2020 and again on 27th April 2020
using the following search terms alone or in combination: "COVID-19,"
"coronavirus," "SARS-CoV-2," "COVID," "anti-interleukin-6 receptor antibodies,"
"anti-IL-6," "tocilizumab," "sarilumab," "siltuximab." We included studies that
reported individual patient data. We extracted and analyzed individual level data
on baseline characteristics, laboratory findings, and clinical outcomes. The
primary endpoint was in-hospital mortality. Secondary endpoints included
in-hospital complications, recovery rates, effect of patient characteristics on
the primary outcome and changes in levels of inflammatory markers. RESULTS: Three
hundred fifty-two records were identified through a systematic search, of which
10 studies met the inclusion criteria. A single study currently under review was
also added. Eleven observational studies encompassing 29 patients were included
in the present review. There were more males (24 [82.8%]), and hypertension was
the most common comorbidity (16 [48.3%]). Over an average of 5.4 hospital days,
the primary endpoint occurred in 6 (20.7%) patients. Among surviving patients,
about 10% had worsened disease and 17% recovered. The most common complication
was acute respiratory distress syndrome (8 [27.6%]). The IL-6 level was
significantly higher after the initiation of tocilizumab with median
(interquartile range) of 376.6 (148-900.6)?pg/mL compared to the baseline of 71.1
(31.9-122.8)?pg/mL (P?=?.002). Mean (standard deviation) levels of C-reactive
protein (CRP) were significantly decreased following treatment 24.6 (26.9)?mg/L
compared to baseline 140.4 (77)?mg/L (P?.0001). Baseline demographics were not
significantly different among survivors and nonsurvivors by Fisher's exact test.
CONCLUSION: In COVID-19 patients treated with tocilizumab, IL-6 levels are
significantly elevated, which are supportive of cytokine storm. Following
initiation of tocilizumab, there is elevation in the IL-6 levels and CRP levels
dramatically decrease, suggesting an improvement in this hyperinflammatory state.
Ongoing randomized control trials will allow for further evaluation of this
promising therapy. IMPORTANCE: Recent data indicate that severe COVID-19 causes a
cytokine release storm and is associated with worse clinical outcomes and IL-6
plays an important role. It is suggestive that anti-IL-6 results in the
improvement of this hyperinflammatory state. However, to our knowledge, there is
no individual patient data systematic review performed to summarize baseline
characteristics and clinical outcomes of COVID-19 patients who received
tocilizumab.
|*Hospital Mortality
[MESH]
|Antibodies, Monoclonal, Humanized/*therapeutic use
[MESH]