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KMID : 1001920210640040505
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Journal of Korean Neurosurgical Society
2021 Volume.64 No. 4 p.505 ~ p.513
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Profiling of T Cell Receptor β-Chain Complimentary Determining Regions 3 Repertoire in Subarachnoid Hemorrhage Patients Using High-Throughput Sequencing
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Kim Bong-Jun
Ahn Jun-Hyong
Youn Dong-Hyuk
Jeon Jin-Pyeong
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Abstract
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Objective : The adaptive immune response following subarachnoid hemorrhage (SAH) is not well understood. We evaluated and compared the T cell receptor (TCR) immune repertoire of good-grade and poor-grade SAH patients to elucidate the T cell immunology after ictus.
Methods : Peripheral blood from six SAH patients was collected at two different times, admission and at the 7-day follow-up. Composition and variation of the TCR β-chain (TCRB) complimentary determining regions (CDR) 3 repertoire was examined using high-throughput sequencing; the analysis was based on sampling time and disease severity (good vs. poor-grade SAH).
Results : Clonality at admission and follow-up were 0.059 (0.037?0.038) and 0.027 (0.014?0.082) (median, 25th?75th percentile). Poor-grade SAH (0.025 [0.011?0.038]) was associated with significantly lower clonality than good-grade SAH (0.095 [0.079?0.101]). Poor-grade SAH patients had higher diversity scores than good-grade SAH patients. CDR length was shorter in good-grade SAH vs. poor-grade SAH. Differences in clonotype distribution were more prominent in TCRBV gene segments than TCRBJ segments. TCRBV19-01/TCRBJ02-04 and TCRBV28-01/TCRBJ02-04 were the most increased and the most decreased V-J pairs in the 7-day follow-up compared to admission in good-grade SAH. The most increased and decreased V-J pairs in poor-grade SAH patients were TCRBV28-01/TCRBJ02-06 and TCRBV30-01/TCRBJ02-04, respectively.
Conclusion : The TCRB repertoire is dynamic in nature following SAH. TCRB repertoire may facilitate our understanding of adaptive immune response according to SAH severity.
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KEYWORD
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Subarachnoid hemorrhage, T cell receptor beta, Immunity, High-throughput sequencing
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