Yang Jingjing, Dai Lei, Yu Qinghua, Yang Qian
Veterinary College, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, PR China.
PLoS One. 2017 Mar 24;12(3):e0173902. doi: 10.1371/journal.pone.0173902. eCollection 2017.
The nasal mucosa is equipped with abundant lymphatic tissues, serving as the first line of defense against invasion by microorganisms. In this study, we characterized the features of the nasal mucosa of Bama minipigs (Sus scrofa domestica) via histological analysis.
Five cross sections (I, II, III, IV, and V) were obtained from the distal end of the nasal cavity toward the pharynx (along the cavity axis) and examined. Specifically, CD3+ T cells, immunoglobulin A (IgA)+ cells, and M cells were detected by immunohistochemistry, while dendritic cells (DCs) were detected by immunofluorescence. The distribution of goblet cells was determined by periodic acid-Schiff (PAS) staining.
The nasal cavity of Bama minipigs can be divided into three parts: the regio vestibularis (I, II), regio respiratoria (III, IV), and regio olfactoria (V). Lymphoid tissue was present at random locations in the nasal cavity. Abundant lymphoid tissue was located in the roof of the nasopharyngeal meatus and was continuous with the lymphoid tissue of the pharynx. The distribution of CD3+ T cells, IgA+ cells, M cells, and DCs increased distally in the nasal cavity.
The present work comprises a histological study of the nasal cavity of Bama minipigs, and will be beneficial for understanding the mechanisms of immunity in these animals after nasal vaccination.
鼻黏膜配备有丰富的淋巴组织,作为抵御微生物入侵的第一道防线。在本研究中,我们通过组织学分析对巴马小型猪(Sus scrofa domestica)鼻黏膜的特征进行了表征。
从鼻腔远端向咽部(沿腔轴)获取五个横截面(I、II、III、IV和V)并进行检查。具体而言,通过免疫组织化学检测CD3 + T细胞、免疫球蛋白A(IgA)+细胞和M细胞,而通过免疫荧光检测树突状细胞(DC)。杯状细胞的分布通过过碘酸希夫(PAS)染色确定。
巴马小型猪的鼻腔可分为三个部分:前庭区(I、II)、呼吸区(III、IV)和嗅区(V)。淋巴组织随机分布于鼻腔中。丰富的淋巴组织位于鼻咽道顶部,并与咽部的淋巴组织相连。CD3 + T细胞、IgA +细胞、M细胞和DC的分布在鼻腔远端增加。
本研究是对巴马小型猪鼻腔的组织学研究,将有助于理解这些动物鼻内接种疫苗后的免疫机制。