Abstract
Background
Descending thoracic aorta aneurysm (dTAA) has increasing incidence and, if left untreated, could lead to death. There is not any study of satralizumab treatment for preventing dTAA formation and progression.
Materials and Methods
Forty male 10-week-old Rattus norvegicus were enrolled in the experiment. They were divided into four equal groups: dTAA treated with saline (dTAA-P) and dTAA treated with satralizumab (dTAA-S). One of the control groups was treated with saline (C-P), and the other was treated with satralizumab (C-S). Satralizumab and saline were used once every 2 weeks, subcutaneously 120 mg for 4 weeks. dTA diameter was measured at days 0, 3, 7, 14, 21, and 28.
Results
IL-6 level was measured on the 7th day that showed significantly increased IL-6 serum level in dTAA-P rats compared to C-P. Maximal dTA diameter (%MAD) was obtained at day 14, which was scientifically matched to the aorta aneurysm definition (>50% increase in diameter). From the seventh day, a significant difference in %MAD was observed between dTAA-P and dTAA-S groups. However, the %MAD of these two groups was significantly higher than control groups till the end of the 28th day.
Conclusion
Using an IL-6 inhibitor agent to prevent dTAA formation and progression showed promising results. It suggests that using the IL-6 inhibitors in susceptible persons can be considered a lifesaving therapeutic approach.
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Data availability
All available data will be provided upon asking by email from Dr. Amir Hossein Heydari (email: amhohe@gmail.com).
Abbreviations
- dTAA:
-
Descending thoracic aorta aneurysm
- dTAA-P:
-
dTAA treated with saline
- dTAA-S:
-
dTAA treated with satralizumab
- C-P:
-
Control group treated with saline
- C-S:
-
Control group treated with satralizumab
- IL-6:
-
Interleukine-6
- TAA:
-
Thoracic aorta aneurysms
- dTA:
-
Descending thoracic aorta
- STZ:
-
Satralizumab
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AHH is taking full responsibility for all data; AHH contributed to study design, and AHH and SH conducted laboratorial procedures. AHH and MEH contributed to data analysis. AHH, SH, and MEH contributed to graphical designs. AHH, SH, and MEH wrote the draft of the manuscript. AHH and MEH wrote the final version of the manuscript.
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Research in Context
What are already known in this context?
• The most definitive treatment for TAA is an open aortic repair with a mortality rate of up to 10% within 1 month after the operation.
• Today there is a lack of knowledge about TAA pathology, so specific drugs for the TAA have not been proposed yet.
• Using satralizumab as an IL-6 receptor blocker was proven safe and effective in neuromyelitis.
What is the main question?
• Is satralizumab able to prevent the beginning and progression of thoracic aorta aneurysm?
What are the new findings?
• Antagonizing the IL-6 receptor by satralizumab attenuated the formation of the dTAA and decreased the growth rate of dTAA.
What are the impacts on clinical practice?
• Satralizumab can be considered a potential anti-aneurysm agent in predisposed patients to prevent the emerging and development of the descending thoracic aorta aneurysm.
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Heydari, A.H., Heydari, S. & Heidari, M.E. Satralizumab, Novel Interleukine-6 Inhibitor for Preventing Descending Thoracic Aorta Aneurysm Development. Cardiovasc Drugs Ther 37, 239–244 (2023). https://doi.org/10.1007/s10557-021-07294-9
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DOI: https://doi.org/10.1007/s10557-021-07294-9