anti mouse gr1 antibody  (ATCC)

Journal: Translational Oncology

Article Title: Circulating low-density neutrophils as biomarkers of resistance to first-line anti-PD-1/PD-L1 immunotherapy in non-small cell lung cancer

doi: 10.1016/j.tranon.2026.102755

Figure Lengend Snippet: Tumor growth kinetics following anti–PD-1, chemotherapy, and anti-Gr1 treatment in LLC tumor–bearing mice. (A): Diagram representing the therapeutic scheme followed for the in vivo experiment. LLC cells were injected subcutaneously on day 0 to establish tumours. Treatments were administered intraperitoneally on days 11, 14, and 17 after tumor cell inoculation, with anti-GR1 administered one day prior to each treatment cycle. The therapeutic regimens included anti-PD1 (100 μg/mouse), anti-GR1 (200 μg/mouse), and chemotherapy consisting of cisplatin (3 mg/kg) plus pemetrexed (100 mg/kg). (B): Growth curves of LLC cells subcutaneously injected into immunocompetent mice, comparing tumour volumes between control and (B) anti-PD-1 treatment, (C) anti-Gr1 treatment, (D) chemotherapy consisting on cisplatin plus pemetrexed, plus anti-PD-1 treatment, (E) chemotherapy plus anti-PD-1 plus anti-Gr1 treatment. *: p <0.05; ***: p <0.001; ****: p <0.0001.

Article Snippet: For the murine experiments, LLC cells were obtained from ATCC (#CRL-1642); anti-mouse Gr1 antibody (#BE0075, clone RB6-8C5) and anti-PD-1 antibody (#BE0273, clone RMP1-14) were purchased from BioXCell; pemetrexed (1000 mg/40 mL, 25 mg/mL) was obtained from TEVA; and cisplatin (#232120) was purchased from Sigma-Aldrich.

Techniques: In Vivo, Injection, Control

Journal: Journal of Pharmaceutical Analysis

Article Title: Oblique-incidence reflectivity difference technology identifies the antiviral drug Ribavirin as an inhibitor of lung tumor progression by targeting AMPK signaling

doi: 10.1016/j.jpha.2025.101306

Figure Lengend Snippet: Identification of 5′-adenosine monophosphate (AMP)-activated protein kinase (AMPK)-binding small-molecule compounds by high-throughput screening (HTS). (A) Small molecule compounds are printed onto homemade phenyl-isocyanate-functionalized glass slides and immobilized through amino, hydroxyl, and thiol groups as well as other interactions. In oblique-incidence reflectivity difference (OI-RD) scanning of small-molecule microarrays (SMMs), successful binding of the target protein at a specific location with small-molecule compounds increases the molecular layer thickness, which OI-RD detects as white spots. The binding of proteins to small molecule compounds is usually coupled mediated by nucleophilic groups (hydroxyl, amino, and thiol). Interactions such as hydrogen bonding will be further formed thereby mediating protein interactions with small molecule compounds. No spot is observed if binding does not occur. Created with www.BioRender.com . (B) Categories of the compound library. Approximately 4389 compounds, including 1678 Food and Drug Administration (FDA)-approved drugs, 1456 natural products, and 1255 known inhibitors, were printed on the chip. (C) A representative image showing the binding of the recombinant AMPK protein to compounds printed on an HTS chip. (D) A real-time OI-RD assay depicting the association‒dissociation curves of surface-immobilized Ribavirin binding to the recombinant AMPK protein. (E) A surface plasmon resonance (SPR) experiment was used to evaluate the interaction kinetics and binding affinity between Ribavirin and AMPK. (F, G) Quantitative real-time polymerase chain reaction (qRT-PCR) measurement of Ampk transcripts in mouse Lewis lung carcinoma (LLC) cells (F) or human non-small cell lung cancer cells (A549) (G). The data are presented as the relative fold induction of Ampk/actin transcripts. Arrows indicate groups with significantly reduced Ampk transcripts. The data shown are the means ± standard error of the mean (SEM) from n = 3 biological replicates. Statistical significance was determined by two-way analysis of variance (ANOVA), followed by Tukey’s post hoc test. ∗∗ P < 0.01, ∗∗∗ P < 0.001. mRNA: messenger RNA.

Article Snippet: Human embryonic kidney epithelial cells (HEK293T; ATCC CRL-11268), human non-small cell lung cancer cells (A549; ECACC 86012804), human lung adenocarcinoma cells (PC-9; ECACC 90071810), and mouse Lewis lung carcinoma (LLC) cells (ATCC CRL-1642) (FuHeng, Shanghai, China) were cultivated in Dulbecco’s Modified Eagle Medium (DMEM) (Gibco, Carlsbad, CA, USA).

Techniques: Binding Assay, High Throughput Screening Assay, Drug discovery, Recombinant, SPR Assay, Real-time Polymerase Chain Reaction, Quantitative RT-PCR

Journal: Journal of Pharmaceutical Analysis

Article Title: Oblique-incidence reflectivity difference technology identifies the antiviral drug Ribavirin as an inhibitor of lung tumor progression by targeting AMPK signaling

doi: 10.1016/j.jpha.2025.101306

Figure Lengend Snippet: The impact of Ribavirin on inflammatory factors is regulated downstream of the 5′-adenosine monophosphate (AMP)-activated protein kinase (AMPK) pathway. (A, B) Quantitative real-time polymerase chain reaction (qRT-PCR) analysis of interleukin-6 ( Il - 6 ) transcript levels in mouse Lewis lung carcinoma (LLC) cells (A) and human non-small cell lung cancer cells (A549) (B) cells following 8 h of hypoxia treatment. The data are presented as the relative fold induction of Il - 6/actin transcripts. Arrows indicate groups with significantly reduced Il - 6 transcripts. Statistical significance was determined by two-way analysis of variance (ANOVA), followed by Tukey’s post hoc test. ∗∗∗ P < 0.001; ∗∗∗∗ P < 0.0001. (C, D) qRT-PCR analysis of Tnf α transcript levels in LLC (C) and A549 (D) cells following 8 h of hypoxia treatment. The data are presented as the relative fold induction of Tnf α/actin transcripts. Arrows indicate groups with significantly reduced Tnf α transcripts. Statistical significance was determined by two-way ANOVA, followed by Tukey’s post hoc test. ∗∗ P < 0.01, ∗∗∗ P < 0.001. (E, F) qRT-PCR analysis of C-X-C motif chemokine ligand 10 ( Cxcl10 ) transcript levels in LLC (E) and A549 (F) cells following 8 h of hypoxia treatment. The data are presented as the relative fold induction of Cxcl10/actin transcripts. The arrows indicate groups with significantly reduced Cxcl10 transcript levels. Statistical significance was determined by two-way ANOVA, followed by Tukey’s post hoc test. ∗∗∗ P < 0.001, ∗∗∗∗ P < 0.0001. (G, H) qRT-PCR analysis of C–C motif chemokine ligand 5 ( Ccl5 ) transcript levels in LLC (G) and A549 (H) cells following 8 h of hypoxia treatment. The data are presented as the relative fold induction of Ccl5/actin transcripts. Arrows indicate groups with significantly reduced Ccl5 transcripts. The data shown are the means ± standard error of the mean (SEM) from n = 3 biological replicates. Statistical significance was determined by two-way ANOVA, followed by Tukey’s post hoc test. ∗ P < 0.05. mRNA: messenger RNA.

Article Snippet: Human embryonic kidney epithelial cells (HEK293T; ATCC CRL-11268), human non-small cell lung cancer cells (A549; ECACC 86012804), human lung adenocarcinoma cells (PC-9; ECACC 90071810), and mouse Lewis lung carcinoma (LLC) cells (ATCC CRL-1642) (FuHeng, Shanghai, China) were cultivated in Dulbecco’s Modified Eagle Medium (DMEM) (Gibco, Carlsbad, CA, USA).

Techniques: Real-time Polymerase Chain Reaction, Quantitative RT-PCR

Journal: Journal of Pharmaceutical Analysis

Article Title: Oblique-incidence reflectivity difference technology identifies the antiviral drug Ribavirin as an inhibitor of lung tumor progression by targeting AMPK signaling

doi: 10.1016/j.jpha.2025.101306

Figure Lengend Snippet: Ribavirin suppresses lung cancer cell growth both in vitro and in vivo . (A, B) Viability of mouse Lewis lung carcinoma (LLC) cells (A) and human non-small cell lung cancer cells (A549) (B) cells treated with various concentrations of Ribavi rin. The data shown are the means ± standard error of the mean (SEM) from n = 3 biological replicates. (C, D) Viability of LLC (C) and A549 (D) cells following treatment with 10 μM Ribavirin or the control for 1–5 days. The data shown are the means ± SEM from n = 3 biological replicates. Statistical significance was determined by two-way analysis of variance (ANOVA), followed by Tukey’s post hoc test. ∗∗ P < 0.01, ∗∗∗ P < 0.001. (E, F) Colony formation of LLC (E) and A549 (F) cells after treatment with 10 μM Ribavirin or the control. The data shown are the means ± SEM from n = 3 biological replicates. Statistical significance was determined by two-way ANOVA, followed by Tukey’s post hoc test. ∗∗ P < 0.01, ∗∗∗ P < 0.001. (G) Tumor anatomy of LLC subcutaneous tumor-bearing mice. (H) Tumor volume of LLC subcutaneous tumor-bearing mice. Statistical significance between datasets was assessed by one-way ANOVA, followed by Tukey’s multiple comparisons post hoc test between all groups. The values are the means ± SEM; n = 5 mice per group, with differences denoted by ∗ P < 0.05. (I) Tumor weights of LLC subcutaneous tumor-bearing mice. Statistical significance between datasets was assessed by one-way ANOVA, followed by Tukey’s multiple comparisons post hoc test between all groups. The values are the means ± SEM; n = 8 mice per group, with differences denoted by ∗∗ P < 0.01. PBS: phosphate buffered saline.

Article Snippet: Human embryonic kidney epithelial cells (HEK293T; ATCC CRL-11268), human non-small cell lung cancer cells (A549; ECACC 86012804), human lung adenocarcinoma cells (PC-9; ECACC 90071810), and mouse Lewis lung carcinoma (LLC) cells (ATCC CRL-1642) (FuHeng, Shanghai, China) were cultivated in Dulbecco’s Modified Eagle Medium (DMEM) (Gibco, Carlsbad, CA, USA).

Techniques: In Vitro, In Vivo, Control, Saline

Journal: Journal of Pharmaceutical Analysis

Article Title: Oblique-incidence reflectivity difference technology identifies the antiviral drug Ribavirin as an inhibitor of lung tumor progression by targeting AMPK signaling

doi: 10.1016/j.jpha.2025.101306

Figure Lengend Snippet: The interaction of Ribavirin with 5′-adenosine monophosphate (AMP)-activated protein kinase (AMPK). (A) Biotin was conjugated to the amide residue of Ribavirin to produce biotin-conjugated Ribavirin. (B) Immunoblotting (IB) of the streptavidin precipitates of the mixture of biotin or biotin-Ribavirin and the lysates of human embryonic kidney epithelial cells (HEK293T) cells transfected with Flag-AMPK. The data shown are representative of n = 3 biological replicates. (C–F) The molecular docking assay illustrates the interaction between Ribavirin and AMPK, identifying the key amino acids involved (C); the blue protein represents AMPK (D), the green small molecule represents Ribavirin (E), and the yellow dashed lines represent the hydrogen bonds formed (F). A binding energy below −5 suggests high reliability of the docking model. (G, H) Immunoblotting of phosphorylated AMPK (p-AMPK) and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) in the lysates of mouse Lewis lung carcinoma (LLC) cells (G) and human lung adenocarcinoma cells (PC9) (H) cells in the presence of Ribavirin (10 μg/mL). The data shown are representative of n = 3 biological replicates. (I, J) Immunoblotting of phosphorylated mechanistic target of rapamycin (p-mTOR), phosphorylated eukaryotic translation initiation factor 4E (eIF4E)-binding protein 1 (p-4EBP1) and GAPDH in the lysates of LLC (I) and PC9 (J) cells in the presence of Ribavirin (10 μg/mL). The data shown are representative of n = 3 biological replicates. (K, L) Quantitative real-time polymerase chain reaction (qRT-PCR) measurement of 4ebp1 (K) and Mtor (L) transcripts in LLC cells in the presence of phosphate buffered saline (PBS) or the indicated concentrations of Ribavirin (10 μm). The data are presented as the fold induction of 4ebp1/Gapdh transcripts and Mtor/Gapdh transcripts. The data shown are the means ± standard error of the mean (SEM) from n = 3 biological replicates. Statistical significance was determined by two-way analysis of variance (ANOVA), followed by Tukey’s post hoc test. ∗∗ P < 0.01, ∗∗∗ P < 0.001, ∗∗∗∗ P < 0.0001. ns: not significant; IP: immunoprecipitation; mRNA: messenger RNA.

Article Snippet: Human embryonic kidney epithelial cells (HEK293T; ATCC CRL-11268), human non-small cell lung cancer cells (A549; ECACC 86012804), human lung adenocarcinoma cells (PC-9; ECACC 90071810), and mouse Lewis lung carcinoma (LLC) cells (ATCC CRL-1642) (FuHeng, Shanghai, China) were cultivated in Dulbecco’s Modified Eagle Medium (DMEM) (Gibco, Carlsbad, CA, USA).

Techniques: Residue, Western Blot, Transfection, Docking Assay, Binding Assay, Real-time Polymerase Chain Reaction, Quantitative RT-PCR, Saline, Immunoprecipitation

Journal: Journal of Pharmaceutical Analysis

Article Title: Oblique-incidence reflectivity difference technology identifies the antiviral drug Ribavirin as an inhibitor of lung tumor progression by targeting AMPK signaling

doi: 10.1016/j.jpha.2025.101306

Figure Lengend Snippet: Ribavirin has synergistic effects on 5′-adenosine monophosphate (AMP)-activated protein kinase (AMPK) downregulation. (A) Three AMPK-targeting short hairpin RNAs (shRNAs) were screened to evaluate their knockdown efficiency and suppress AMPK expression in lung cancer cells. The data shown are representative of n = 3 biological replicates. (B) Tumor anatomy of mouse Lewis lung carcinoma (LLC) cells subcutaneous tumor-bearing mice in different treatment groups. (C) Tumor volume of LLC subcutaneous tumor-bearing mice in different treatment groups. Statistical significance between datasets was assessed by one-way analysis of variance (ANOVA), followed by Tukey’s multiple comparisons post hoc test between all groups. The values are the means ± standard error of the mean (SEM); n = 8 mice per group, with differences denoted by ∗ P < 0.05 and ∗∗ P < 0.01. (D) Tumor weights of LLC subcutaneous tumor-bearing mice in different treatment groups. Statistical significance between datasets was assessed by one-way ANOVA, followed by Tukey’s multiple comparisons post hoc test between all groups. The values are the means ± SEM; n = 8 mice per group, with differences denoted by ∗ P < 0.05, ∗∗ P < 0.01, and ∗∗∗ P < 0.001. (E) Schematic illustration of the mechanism by which Ribavirin regulates AMPK activation. AMPK is phosphorylated in response to an increased AMP/adenosine triphosphate (ATP) or adenosine diphosphate (ADP)/ATP ratio, influencing cell growth and proliferation by inactivating mechanistic target of rapamycin complex 1 (mTORC1). Ribavirin exerts its regulatory effect by inhibiting AMPK phosphorylation. Created with www.BioRender.com . shControl: non-targeting control short hairpin RNA; shAMPKα: AMPKα-targeting short hairpin RNA; GAPDH: glyceraldehyde-3-phosphate dehydrogenase; PBS: phosphate buffered saline; mTOR: mechanistic target of rapamycin; Raptor: regulatory-associated protein of mTOR; Deptor: DEP domain-containing mTOR-interacting protein; PRAS40: proline-rich Akt substrate of 40 kDa; mLST8: mammalian lethal with SEC13 protein 8; 4EBP1:eukaryotic translation initiation factor 4E-binding protein 1; P: phosphorylation.

Article Snippet: Human embryonic kidney epithelial cells (HEK293T; ATCC CRL-11268), human non-small cell lung cancer cells (A549; ECACC 86012804), human lung adenocarcinoma cells (PC-9; ECACC 90071810), and mouse Lewis lung carcinoma (LLC) cells (ATCC CRL-1642) (FuHeng, Shanghai, China) were cultivated in Dulbecco’s Modified Eagle Medium (DMEM) (Gibco, Carlsbad, CA, USA).

Techniques: Knockdown, Expressing, Activation Assay, Phospho-proteomics, Control, shRNA, Saline, Binding Assay