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    DSMZ cell culture experiments hela s3
    Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and <t>HeLa</t> cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.
    Cell Culture Experiments Hela S3, supplied by DSMZ, used in various techniques. Bioz Stars score: 94/100, based on 42 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/cell+culture+experiments+hela+s3/HELA-S3/pm40389585-223-3-36
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    1) Product Images from "Highly specific Immunoproteasome inhibitor M3258 induces proteotoxic stress and apoptosis in KMT2A::AFF1 driven acute lymphoblastic leukemia."

    Article Title: Highly specific Immunoproteasome inhibitor M3258 induces proteotoxic stress and apoptosis in KMT2A::AFF1 driven acute lymphoblastic leukemia.

    Journal: Scientific reports

    doi: 10.1038/s41598-025-01657-0

    Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and HeLa cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.
    Figure Legend Snippet: Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and HeLa cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.

    Techniques Used: Inhibition, Purification, Flow Cytometry, Activity Assay, Glo Assay

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    Cell Culture:

    Article Title: Highly specific Immunoproteasome inhibitor M3258 induces proteotoxic stress and apoptosis in KMT2A::AFF1 driven acute lymphoblastic leukemia.
    Article Snippet: Ac-GPLD-amc was custom synthesized by Genscript; all other substrates were custom synthesized by China Peptide. .. Cell lines and cell culture experiments HeLa S3 (RRID: CVCL_0058), RS4;11 (RRID: CVCL_0093), REH (RRID: CVCL_1650), and NALM-6 (RRID: CVCL_0092) cells were obtained from the American Tissue Culture collection; SEM (RRID: CVCL_0095) cells were obtained from DSMZ (Braunschweig, Germany). ..



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    Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and <t>HeLa</t> cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.
    Cell Culture Experiments Hela S3, supplied by ATCC, used in various techniques. Bioz Stars score: 97/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    cell culture experiments hela s3  (DSMZ)
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    DSMZ cell culture experiments hela s3
    Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and <t>HeLa</t> cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.
    Cell Culture Experiments Hela S3, supplied by DSMZ, used in various techniques. Bioz Stars score: 94/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/cell+culture+experiments+hela+s3/HELA-S3/pm40389585-223-3-36
    Average 94 stars, based on 1 article reviews
    cell culture experiments hela s3 - by Bioz Stars, 2026-10
    94/100 stars
    		  Buy from Supplier

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    Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and HeLa cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.

    Journal: Scientific reports

    Article Title: Highly specific Immunoproteasome inhibitor M3258 induces proteotoxic stress and apoptosis in KMT2A::AFF1 driven acute lymphoblastic leukemia.

    doi: 10.1038/s41598-025-01657-0

    Figure Lengend Snippet: Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and HeLa cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.

    Article Snippet: Cell lines and cell culture experiments HeLa S3 (RRID: CVCL_0058), RS4;11 (RRID: CVCL_0093), REH (RRID: CVCL_1650), and NALM-6 (RRID: CVCL_0092) cells were obtained from the American Tissue Culture collection; SEM (RRID: CVCL_0095) cells were obtained from DSMZ (Braunschweig, Germany).

    Techniques: Inhibition, Purification, Flow Cytometry, Activity Assay, Glo Assay

    Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and HeLa cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.

    Journal: Scientific reports

    Article Title: Highly specific Immunoproteasome inhibitor M3258 induces proteotoxic stress and apoptosis in KMT2A::AFF1 driven acute lymphoblastic leukemia.

    doi: 10.1038/s41598-025-01657-0

    Figure Lengend Snippet: Fig. 1. M3258, a highly specific inhibitor of β5i sites, induces apoptosis in ALL cells. (a) Inhibition of proteasome active sites was measured in extracts of RS4;11 and HeLa cells, and in the purified constitutive 26 S proteasomes; n = 2. (b, c) Cells were treated with Btz (b) or M3258 (c) for 48 h, and the viability was assessed by Alamar Blue; n = 2–4. (d) RS4;11 cells were treated with 75 nM and 300 nM M3258 for indicated times, and percentage of apoptotic cells was determined by flow cytometry; n = 2. (e) Cells were treated with M3258 for 12 h, and apoptosis was determined by flow cytometry. In a parallel experiment, RS4;11 cells were treated with M3258 for 4 h, and the chymotrypsin-like (β5) activity was measured by the Proteasome-Glo assay; n = 2. (f) The chymotrypsin-like (β5) activity of the proteasomes in cells treated with M3258 for times indicated was determined by the Proteasome-Glo assay; n = 2. (g) MM1.S cells were pre-treated with IFNγ for three days and then treated with M3258 for 48 h. Viability was measured with Alamar Blue; n = 2. Data on all panels are averages of n biological replicates, and the error bars indicate standard error of the mean.

    Article Snippet: Cell lines and cell culture experiments HeLa S3 (RRID: CVCL_0058), RS4;11 (RRID: CVCL_0093), REH (RRID: CVCL_1650), and NALM-6 (RRID: CVCL_0092) cells were obtained from the American Tissue Culture collection; SEM (RRID: CVCL_0095) cells were obtained from DSMZ (Braunschweig, Germany).

    Techniques: Inhibition, Purification, Flow Cytometry, Activity Assay, Glo Assay