The lack of terminal tubule cells in the submandibular gland of mice deficient in submandibular gland protein C

The lack of terminal tubule cells in the submandibular gland of mice deficient in submandibular gland protein C
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颌下腺蛋白C缺陷小鼠颌下腺终末小管细胞缺失

DOI:
10.1007/s00441-020-03205-w
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发表时间:
2020
影响因子:
3.6
通讯作者:
Iseki S
Iseki S
中科院分区:
生物学3区
文献类型:
--
作者:
Nakata H;Terakawa J;Horike S;Daikoku T;Iseki S

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新生小鼠的下颌下腺(SMG)没有成熟的腺泡,但有称为终末小管(TT)的腺泡雏形。TT由具有深色分泌颗粒的TT细胞和具有浅色分泌颗粒的前腺泡细胞组成,后者被认为是成熟腺泡细胞的直接前体。TT细胞含有一种特殊的分泌蛋白,下颌下腺蛋白C(SMGC),它们在出生后减少的数量在男性比女性更高的速度。在本研究中,为了阐明TT细胞及其分泌产物SMGC的生物学作用,我们产生了SMGC缺陷的敲除(KO)小鼠品系。两种性别的KO小鼠生长正常,具有正常的生殖能力,成年时SMG中具有正常的腺泡和导管系统。然而,通过新生儿和出生后早期阶段,KO小鼠不仅缺乏SMGC的产生,而且缺乏TT细胞。新生KO小鼠SMG的电子显微镜下,TT细胞的特征颗粒是不存在的,取而代之的是未分化的导管细胞,而原腺泡细胞是正常的。这些结果表明,SMGC的缺乏抑制了TT细胞的发育,SMGC和TT细胞的缺乏对SMG腺泡和导管系统的生后发育没有显着影响。
The submandibular gland (SMG) of newborn mice has no mature acini but has the rudiments of acini called terminal tubules (TT). The TT are composed of TT cells with dark secretory granules and proacinar cells with lighter secretory granules, the latter being considered the immediate precursor of mature acinar cells. TT cells contain a specific secretory protein, submandibular gland protein C (SMGC) and they decrease in number postnatally at a higher rate in males than in females. In the present study, in order to clarify the biological roles of TT cells and their secretory product SMGC, we generated a knockout (KO) mouse strain deficient in SMGC. The KO mice of both sexes grew normally, had normal reproductive capacity and had normal acinar and duct systems in the SMG in adult ages. However, through the neonatal and early postnatal stages, the KO mice were deficient not only in the production of SMGC but also in TT cells. With electron microscopy of the SMG of newborn KO mice, TT cells with characteristic granules were absent and replaced by undifferentiated ductal cells, whereas proacinar cells were normal. These results suggested that the absence of SMGC inhibits the development of TT cells and that the absence of SMGC and TT cells has no notable influence on the postnatal development of the acinar and duct systems in the SMG.
胎鼠颌下腺内源性过氧化物酶的发育
DOI: --
发表时间: 1973
影响因子: 3.2
作者:
S. Yamashina;T. Barka
通讯作者: T. Barka
DOI: 10.1007/bf00337607
发表时间: 2004
期刊: Zeitschrift für Zellforschung und Mikroskopische Anatomie
影响因子: --
作者:
M. Dvořák
通讯作者: M. Dvořák
正常大鼠和异丙肾上腺素治疗大鼠下颌下腺发育中过氧化物酶活性的定位
DOI: 10.1177/20.11.855
发表时间: 1972
影响因子: 3.2
作者:
S. Yamashina;T. Barka
通讯作者: T. Barka
一种仅限于新生大鼠颌下腺 I 型细胞的分泌蛋白。
DOI: 10.1016/0012-1606(88)90393-4
发表时间: 1988
影响因子: 2.7
作者:
Ball,WD;Hand,AR;Moreira,JE;Johnson,AO
通讯作者: Johnson,AO
围产期大鼠下颌下腺腺泡内有两个独立调节的分泌系统。
DOI: --
发表时间: 1984
期刊:
影响因子: --
作者:
Ball Wd;Redman Rs
通讯作者: Redman Rs