1
|
Fujihara Y, Yamanegi K, Nagasawa Y, Yoshida A, Goto Y, Kumanishi S, Futani H, Fukunishi S, Yoshiya S, Nishiura H. Programmed cell death 1 positive lymphocytes at palate tonsils in the elder patients with chronic tonsillitis. Biochem Biophys Rep 2021; 25:100898. [PMID: 33490647 PMCID: PMC7809388 DOI: 10.1016/j.bbrep.2020.100898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 12/15/2020] [Accepted: 12/22/2020] [Indexed: 11/19/2022] Open
Abstract
Circulating lymphocytes infiltrate into local foci at the inflammatory phase of acute wound healing for activation of the immune system and express an immune checkpoint protein programmed cell death 1 (PD-1) at the resolution phase for inactivation of the immune system. Conversely, the PD-1 expression was still found even on circulating lymphocytes of the elder patients with chronic tonsillitis at the palliative stage. Recently, an adhesion G protein coupled receptor 56 (GPR56) was reported to at least work as a proliferation factor for infiltrated lymphocytes into local foci at the resolution phase of acute wound healing. To preliminary examine a similar role of PD-1 and GPR56 at local foci at chronic inflammation, palate tonsils were prepared from small amounts of patients with chronic tonsillitis and tonsillar hypertrophy. A positive relationship of RNA expression might be observed between PD-1 and GPR56 in the elder patients with chronic tonsillitis. In regard to immunohistopathological findings, there were huge and small amounts of PD-1 and GPR56 expression at the marginal zone of lymphoid follicles of palate tonsils with chronic tonsillitis. Moreover, the positive relationship of RNA expression between PD-1 and GPR56 confirmed in large numbers of the elder patients with chronic tonsillitis. Probably, GPR56 participates in a supplement of PD-1+ lymphocytes to circulating bloods of the elder patients with chronic tonsillitis through a lymphocyte cell maintenance system at the marginal zone of the lymphoid follicles of palate tonsils.
Collapse
Affiliation(s)
- Yuki Fujihara
- Department of Orthopedic Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
| | - Koji Yamanegi
- Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
| | - Yasuyuki Nagasawa
- Department of Internal Medicine, Division of Kidney and Dialysis, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
| | - Ayu Yoshida
- Department of Otorhinolaryngology Ear Nose Throat, Konan Hospital, Kobe, Hyogo, 663-8501, Japan
| | - Yukako Goto
- Department of Otorhinolaryngology Ear Nose Throat, Konan Hospital, Kobe, Hyogo, 663-8501, Japan
| | - Shunsuke Kumanishi
- Department of Orthopedic Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
| | - Hiroyuki Futani
- Department of Orthopedic Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
| | - Shigeo Fukunishi
- Department of Orthopedic Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
| | - Shinichi Yoshiya
- Department of Orthopedic Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
| | - Hiroshi Nishiura
- Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo, 663-8501, Japan
- Corresponding author.
| |
Collapse
|