1.陆军军医大学(第三军医大学):,高原军事医学系高原作业医学教研室,重庆
2.陆军军医大学(第三军医大学):,药学与检验医学系临床血液学教研室,重庆
3.联勤保障部队第九四〇医院神经内科,甘肃兰州
4.重庆医药高等专科学校,重庆
GUAN Xiao, E-mail: 343482960@qq.com
Received:18 November 2024,
Revised:04 March 2025,
Published:30 April 2025
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黄沛,王洪晨,黄河,等.NK细胞特异性敲除UTX以性别差异方式调控黑色素瘤肺转移[J].陆军军医大学学报,2025,47(08):807-815.
HUANG Pei,WANG Hongchen,HUANG He,et al.NK cell-specific knockout of UTX modulates pulmonary metastasis of melanoma in a sex-dependent manner[J].J Army Med Univ,2025,47(08):807-815.
黄沛,王洪晨,黄河,等.NK细胞特异性敲除UTX以性别差异方式调控黑色素瘤肺转移[J].陆军军医大学学报,2025,47(08):807-815. DOI:10.16016/j.2097-0927.202411078.
HUANG Pei,WANG Hongchen,HUANG He,et al.NK cell-specific knockout of UTX modulates pulmonary metastasis of melanoma in a sex-dependent manner[J].J Army Med Univ,2025,47(08):807-815. DOI:10.16016/j.2097-0927.202411078.
目的
2
探究X染色体编码的表观调节因子UTX对自然杀伤(natural killer,NK)细胞抗肿瘤活性的调控作用。
方法
2
采用
Ncr1-iCre
工具雄鼠与
UTX
fl/fl
雌鼠杂交,获得F1代
Ncr1-iCre
+
UTX
fl/-
雄鼠,进而将F1代小鼠与
UTX
fl/fl
雌鼠杂交,获得对照雄鼠
Ncr1-iCre
-
UTX
fl/-
(M-对照)和NK细胞特异性敲除UTX雄鼠
Ncr1-iCre
+
UTX
fl/-
(M-敲除);以及对照雌鼠
Ncr1-iCre
-
UTX
fl/fl
(F-对照)和UTX基因敲除雌鼠
Ncr1-iCre
+
UTX
fl/fl
(F-敲除)。UTX基因敲除小鼠通过尾静脉注射黑色素瘤细胞B16F10,观察肺脏转移的肿瘤结节数量;并通过流式细胞术分析肺脏NK细胞比例(CD3
-
CD19
-
NK1.1
+
)、数量、成熟分子KLRG1和CD11b、表达活化受体NKG2D和CD69及效应分子穿孔素、颗粒酶B、CD107a和干扰素-γ(interferon-γ, IFN-γ)的改变;继而将分选的NK细胞与B16F10细胞共培养,通过流式细胞术检测B16F10细胞凋亡的改变。
结果
2
与M-对照雄鼠相比较,M-敲除雄鼠肺脏黑色素瘤结节数量显著减少(
P
<
0.05);肺脏NK细胞比例和数量均显著增加(
P
<
0.01);NK细胞成熟标志分子KLRG1和CD11b比例无显著改变;NK细胞毒性分子穿孔素表达增加(
P<
0.01),而效应分子颗粒酶B、脱颗粒标志分子CD107a,以及细胞因子IFN-γ无统计学差异;NK细胞与B16F10细胞共培养导致肿瘤细胞凋亡显著增加(
P
<
0.05)。相比于F-对照雌鼠,F-敲除雌鼠肺脏黑色素瘤结节数量无统计学差异;肺脏NK细胞比例和数量显著增加(
P<
0.05);KLRG1和CD11b比例显著减少(
P<
0.01);NK细胞穿孔素表达增加,颗粒酶B、CD107a和IFN-γ表达均显著减少(
P<
0.01);NK细胞与B16F10细胞共培养,肿瘤细胞凋亡显著减少(
P<
0.05)。
结论
2
NK特异性敲除UTX以性别差异方式调控小鼠黑色素瘤肺转移。
Objective To explore the role of X chromosome encoded epigenetic regulator UTX in NK cell-mediated anti-tumor activity. Methods Male
Ncr1-iCre
mice were crossed with female
UTX
fl/fl
mice to generate F1
Ncr1-iCre
+
UTX
fl/-
male mice
which were further crossed with female
UTX
fl/fl
mice to obtain male
Ncr1-iCre
-
UTX
fl/-
control mice (M-Con) and NK-specific deletion of UTX male mice
Ncr1
-
iCre
+
UTX
fl/-
(M-KO)
as well as female
Ncr1-iCre
-
UTX
fl/fl
control mice (F-Con) and UTX-deficient female mice
Ncr1
-
iCre
+
UTX
fl/fl
(F-KO). UTX-deficient mice were injected with melanoma cell line B16F10
via
tail vein to observe pulmonary metastatic tumor nodules. Moreover
flow cytometry was applied to detect the proportion and quantity of pulmonary NK cells (CD3
-
CD19
-
NK1.1
+
)
maturation makers KLRG1 and CD11b
activation receptors NKG2D and CD69
and effector molecules
including perforin
granzyme B
CD107a
and IFN-γ. Then pulmonary NK cells were sorted and co-cultured with B16F10 cells
and the apoptosis of the melanoma cells was measured with flow cytometry. Results Compared with the M-Con mice
the M-KO
mice presented less number of pulmonary tumor nodules (
P
<
0.05)
increased proportion and quantity of NK cells in the tumor microenvironment (
P
<
0.01)
though no obvious changes in the ratio of NK maturation makers KLRG1 to CD11b
enhanced expression level of cytotoxic
molecule perforin (
P
<
0.01)
but no changes in the expression of effector molecule granzyme B
degranulation marker CD107a and cytokine IFN-γ in NK cells. Co-culture of NK cells and B16F10 cells promoted the apoptosis of tumor cells (
P
<
0.05). Compared with the F-Con mice
the F-KO mice had no statistical difference in the number of pulmonary tumor nodules
but larger proportion and number of NK cells (
P
<
0.05)
decreased ratio of KLRG1 to CD11b (
P
<
0.01)
elevated level of perforin but decreased levels of granzyme B
CD107a and IFN-γ in NK cells (
P
<
0.01). The co-culture of NK cells and B16F10 cells reduced the apoptosis of tumor cells in F-KO
female mice (
P
<
0.05). Conclusion NK-specific deletion of UTX regulates pulmonary metastasis of melanoma in a sex-dependent manner.
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