Journal: Cell Death & Disease
Article Title: Post-irradiation dietary restriction impairs hematopoiesis via inhibition of the pentose phosphate pathway in hematopoietic stem and progenitor cells
doi: 10.1038/s41419-025-08249-w
Figure Lengend Snippet: A Experimental scheme. Wild-type C57BL/6 mice (2 months old) were irradiated with 4.5 Gy X-rays and fed with an AL diet. Mice were then injected intraperitoneally with 10 mg/kg of 6-aminonicotinamide (6-AN) or saline daily for 7 days post-irradiation, and were continued on an AL diet until 1 month post-irradiation ( n = 5 mice per group from 1 experiment representative of 2 independent experiments). G6PD enzyme activity ( B ) and NADPH content ( C ) in BM cells of AL mice 1 month post-irradiation, analyzed using ELISA. WBC ( D ), Neutrophil ( E ), and lymphocyte ( F ) counts in PB of AL mice 1 month post-irradiation. G , H Spleen and thymus weights of AL mice 1 month post-irradiation. I Total BM cell counts of AL mice 1 month post-irradiation. FACS analysis of frequencies of B220 + lymphocytes in PB ( J ), spleen ( K ), BM ( L ); and frequencies of HSCs ( M ), CMPs ( O ), and GMPs ( P ), and representative FACS Plots of HSCs ( N ) and CMPs/GMPs/MEPs ( Q ) of AL mice 1 month post-irradiation. R and S Quantification and representative images of γH2AX and 53BP1 colocalization in BM cells of AL mice 1 month post-irradiation, determined by immunofluorescent staining (scale bar: 10 μm). T–A’ Chimerism of donor-derived cells in the PB, including WBCs ( T ), B cells ( V ), T cells ( X ), and myeloid cells ( Z ) chimerism after transplantation at indicated time points and representative FACS plot of WBCs ( U ), B cells ( W ), T cells ( Y ), myeloid cells ( A’ ) at 4 months post-transplantation. Results were displayed as mean ± SD;. ns, not significant; * p < 0.05; ** p < 0.01; *** p < 0.001; **** p < 0.0001 by unpaired two-tailed Student’s t -test and Two-way ANOVA test with Tukey’s multiple comparisons test. IR AL + 6-AN: irradiated ad libitum group injected with 6-AN; IR AL + NS: irradiated ad libitum group injected with saline.
Article Snippet: The G6PD activator AG1 was purchased from MedChemExpress Co., Ltd., China (CAS No. 421581-52-4; Lot number: HY-123962; purity: 99.54%), and was diluted in dimethyl sulfoxide (DMSO) for injection intraperitoneally every other day for 9 times post-irradiation.
Techniques: Irradiation, Injection, Saline, Activity Assay, Enzyme-linked Immunosorbent Assay, Staining, Derivative Assay, Transplantation Assay, Two Tailed Test