Cited by 37Endometriosis Research and TreatmentEstrogen and related hormone effectsInflammasome and immune disorders

Bufalin suppresses endometriosis progression by inducing pyroptosis and apoptosis

Open access
Cho, Yeon Jean, Lee, Jiyeun E, Park, Mi Jin, O’Malley, Bert W, Han, Sang Jun·2018·Journal of Endocrinology

Abstract

The steroid receptor coactivator (SRC)-1 isoform/estrogen receptor (ER)-β axis has an essential role in endometriosis progression. In this context, therefore, bufalin was employed as a ‘tool compound’ to evaluate inhibitors of SRC in alternative endometriosis treatment. Bufalin effectively suppressed the growth of primary human endometrial stroma cells isolated from endometriosis patients compared to women without endometriosis and immortalized human endometrial epithelial and stromal cells expressing the SRC-1 isoform compared to their parental cells in vitro . In vivo , compared to the vehicle, bufalin treatment significantly suppressed the growth of endometriotic lesions in mice with surgically induced endometriosis because bufalin disrupted the functional axis of SRC-1 isoform/ERβ by increasing SRC-1 isoform protein stability, hyperactivating the transcriptional activity of the SRC-1 isoform and degrading the ERβ protein by proteasome 26S subunit, non-ATPase 2 in endometriotic lesions. Bufalin treatment elevated the apoptosis signaling in epithelial cells of endometriotic lesions. In stromal cells of endometriotic lesions, bufalin treatment increased the levels of pyroptosis markers (caspase 1 and the active form of interleukin 1β) and reduced proliferation. In addition, bufalin treatment increased the expression levels of endoplasmic reticulum-stress (ERS) markers (PKR-like ER kinase, protein disulfide isomerase and binding immunoglobulin) in endometriotic lesions. Collectively, the bufalin-induced disruption of the SRC-1 isoform/ERβ axis might induce apoptosis, pyroptosis and ERS signaling in endometriotic lesions, causing the suppression of endometriosis. Therefore, future generations of SRC-modulators could be employed as an alternative medical approach for endometriosis treatment.

Integrity signals

Registry

Crossref · 10.1530/joe-17-0700

Cites

46 of 46 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 36 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    In IHESCs, 20 nM bufalin for 48 hours reduced full-length SRC-1 levels by 5.0-fold compared with vehicle.

    “In contrast to the results for the SRC-1 isoform, 20 nM bufalin treatment, compared with the vehicle, reduced the levels of full-length SRC-1 by 5.0-fold in IHESCs with 48-hour treatment (Fig. 2D).”
    Quote in the paperSubstantial claim
  • Findingown data

    Bufalin inhibited the growth of primary human endometrial stromal cells from endometriosis patients more than those from women without endometriosis.

    “Bufalin effectively inhibited the growth of primary human endometrial stromal cells from endometriosis patients compared to those isolated from women without endometriosis (Fig. 1A).”
    • Also stated in: § Abstract · plain
      “Bufalin effectively suppressed the growth of primary human endometrial stroma cells isolated from endometriosis patients compared to women without endometriosis and immortalized human endometrial epithelial and stromal cells expressing the SRC-1 isoform compared to their parental cells in vitro.”
    Quote in the paperSubstantial claim
  • Findingown data

    In IHESCs:SRC-1 ISO, 20 nM bufalin for 48 hours elevated SRC-1 isoform protein levels by 2.4-fold compared with vehicle.

    “We found that 20 nM bufalin treatment, compared with the vehicle, elevated the SRC-1 isoform protein levels by 2.4-fold in IHESCs:SRC-1 ISO with 48-hour treatment (Fig. 2C).”
    Quote in the paperSubstantial claim
  • Findingown data

    Bufalin significantly reduced the growth of IHESCs and IHEECs overexpressing the SRC-1 isoform compared with their parental cells.

    “The growth of IHESCs:SRC-1 ISO and IHEECS:SRC-1 ISO was significantly reduced by bufalin treatment compared to their parental cells (Figs. 1B and 1C).”
    Quote in the paperSubstantial claim
  • Findingown data

    Bufalin treatment increased SRC-1 isoform protein levels by 2.7-fold (p=0.005) in endometriotic lesions compared with vehicle.

    “Western blot analysis revealed that compared to the vehicle, bufalin treatment increased SRC-1 isoform protein levels by 2.7-fold (p=0.005) in endometriotic lesions (Fig. 2B).”
    Quote in the paperSubstantial claim
  • May combine two claims. 41
  • Classified as probably not a substantial claim. 12
  • May combine two claims.

    Findingown data

    In stromal cells of endometriotic lesions, bufalin treatment increased pyroptosis markers (caspase 1 and active IL-1β) and reduced proliferation.

    “In stromal cells of endometriotic lesions, bufalin treatment increased the levels of pyroptosis markers (caspase 1 and the active form of interleukin 1β) and reduced proliferation.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The surgically induced mouse model of endometriosis is representative of human endometriosis for evaluating bufalin's effects.
  • May combine two claims.

    Findingown data

    Full-length SRC-1 was degraded by PSMD2 but not by UBA7.

    “the full-length SRC-1 was degraded by PSMD2 but not by UBA7 (Fig. 4F).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Bufalin treatment (1 mg/kg for 21 days) did not reduce reproductive activity or disrupt fertility in female mice compared with vehicle.

    “The female mouse fertility assay revealed that compared with vehicle treatment, bufalin treatment did not reduce the reproductive activity in female mice (Fig. 8D).”
    • Also stated in: § Bufalin treatment did not impair normal uterine function of mice without endometriosis · plain
      “In our hands, therefore, the 21-day bufalin treatment (1 mg/kg) did not disrupt the fertility of female mice.”
    • Also stated in: § Conclusion · plain
      “Our study also revealed that 21-day bufalin treatment (1 mg/kg) did not impair normal uterine function and fertility.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingreasoning

    Bufalin treatment increased the SRC-1 isoform level and its transcriptional activity in endometriotic lesions.

    “Similar to SRC-1 isoform overexpression, bufalin treatment increased the SRC-1 isoform level and its transcriptional activity in endometriotic lesions.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Activation of pyroptosis and apoptosis are detected in stromal and epithelial cells of endometriotic lesions, respectively.

    “For example, activation of pyroptosis and apoptosis are detected in stromal and epithelial cells of endometriotic lesions, respectively.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    The SRC-1 isoform and ERβ are present at higher levels in endometriotic tissue than in normal endometrium.

    “our prior study revealed that a steroid receptor coactivator (SRC)-1 isoform that is proteolytically cleaved from the full-length SRC-1 by matrix metalloproteinase-9 and estrogen receptor (ER) β are specifically elevated in endometriotic tissues compared to the normal endometrium”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Han et al. 2012

      Not checked in the free run.

    • cites Han et al. 2015

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Bufalin inhibits the intrinsic transcriptional activity of SRC-1 and SRC-3 and degrades their proteins in various cancer cells, suppressing their growth.

    “Bufalin, one of the SRC-SMIs, inhibited the intrinsic transcriptional activity of SRC-1 and -3 and degraded their proteins in various cancer cells to suppress their growth (Wang et al. 2014).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Wang et al. 2014

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    The SRC-1 isoform/ERβ axis blocks TNFα-induced apoptosis and promotes inflammasome-mediated inflammatory signaling in endometriotic lesions, supporting their survival.

    “this SRC-1 isoform/ERβ axis has an essential role in endometriosis progression because this axis prevents TNFα-mediated apoptosis and enhances inflammasome-mediated inflammatory signaling in endometriotic lesions for their survival (Han, et al. 2012; Han, et al. 2015).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Han et al. 2012

      Not checked in the free run.

    • cites Han et al. 2015

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Bufalin and gossypol are small-molecule inhibitors that reduce SRC activity and protein stability and inhibit growth of various cancer cells.

    “Our previous studies defined small molecular inhibitors (SMIs), such as bufalin and gossypol, that diminished the activities and protein stabilities of SRCs and suppressed the growth of various cancer cells (Wang, et al. 2011; Wang, et al. 2014).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Wang et al. 2011

      Not checked in the free run.

    • cites Wang et al. 2014

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    Bufalin hyperactivated SRC-1 isoform function in endometriotic lesions by stabilizing the SRC-1 isoform protein and stimulating its transcriptional activity.

    “Collectively, bufalin hyperactivated the SRC-1 isoform function in endometriotic lesions by stabilizing the SRC-1 isoform protein, stimulating its transcriptional activity.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductnone given

    Mice with endometriosis were randomly divided into two groups before receiving vehicle or 1 mg/kg bufalin daily for 21 days.

    “After endometriotic lesions were established (one week after endometriosis induction), the mice were randomly divided into two groups and then subcutaneously administered vehicle (as the control) or 1 mg/kg of bufalin daily for 21 days.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    IHESCs are karyotypically, morphologically, and phenotypically similar to primary parent cells, and IHEECs retain normal functions and characteristics of primary cells.

    “because IHESCs are karyotypically, morphologically, and phenotypically similar to the primary parent cells (Krikun et al. 2004) and because IHEECs also retain the normal functions and characteristics of the primary cells (Kyo, et al. 2003).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Krikun et al. 2004

      Not checked in the free run.

    • cites Kyo et al. 2003

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    Bufalin disrupted the SRC-1 isoform/ERβ axis in endometriotic lesions by raising SRC-1 isoform protein levels and lowering ERβ protein levels, leading to suppressed endometriosis progression.

    “Therefore, bufalin treatment disrupted the SRC-1 isoform/ERβ axis by increasing SRC-1 isoform protein levels, decreasing ERβ protein levels in endometriotic lesions, and then suppressing endometriosis progression.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The surgically induced mouse model of endometriosis is representative of human endometriosis for evaluating bufalin's effects.
  • May combine two claims.

    Interpretationown data

    Bufalin treatment lowered ERβ protein levels but did not inhibit ERβ transcriptional activity in endometriotic lesions.

    “Therefore, bufalin treatment decreased the protein levels of ERβ but did not inhibit its transcriptional activity in endometriotic lesions.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationown data

    Bufalin treatment significantly reduced proliferation of endometrial stromal cells but not epithelial cells from endometriotic lesions.

    “Therefore, the bufalin treatment significantly reduced the proliferation of endometrial stromal cells but not that of epithelial cells from endometriotic lesions.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The surgically induced mouse model of endometriosis is representative of human endometriosis for evaluating bufalin's effects.
  • May combine two claims.

    Interpretationreasoning

    Bufalin-induced disruption of the SRC-1 isoform/ERβ axis may induce apoptosis, pyroptosis, and ER-stress signaling in endometriotic lesions, causing suppression of endometriosis.

    “Collectively, the bufalin-induced disruption of the SRC-1 isoform/ERβ axis might induce apoptosis, pyroptosis and ER-stress signaling in endometriotic lesions, causing the suppression of endometriosis.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The surgically induced mouse model of endometriosis is representative of human endometriosis for evaluating bufalin's effects.
  • May combine two claims.

    Interpretationnone given

    Bufalin degrades ERβ protein by elevating PSMD2 and hyperactivates SRC-1 isoform function in endometriotic lesions.

    “Bufalin degrades ERβ protein by elevating PSMD2 and hyperactivates SRC-1 isoform function in endometriotic lesions.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    Disruption of the bufalin-induced SRC-1 isoform/ERβ axis is associated with activation of apoptosis signaling in epithelial cells and reduced proliferation of stromal cells.

    “This disruption of the bufalin-induced SRC-1 isoform/ERβ axis is associated with activation of apoptosis signaling in epithelial cells and reduces the proliferation of stromal cells.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    Bufalin treatment is associated with increased apoptosis signaling in epithelial cells and decreased proliferation of stromal cells from endometriotic lesions.

    “Collectively, bufalin treatment is associated with elevation of apoptosis signaling in epithelial cells and reduction of proliferation of stromal cells from endometriotic lesions.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Bufalin is a traditional oriental medicine used for cancer treatment because it induces apoptosis in cancer cells.

    “Bufalin has been known as a traditional oriental medicine and used for cancer treatment because it induces apoptosis in cancer cells (Takai, et al. 2012).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Takai, et al. 2012

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    Bufalin treatment stimulates pyroptosis in stromal cells and then elevates ER stress signaling in endometriotic lesions.

    “In addition, bufalin treatment stimulates the pyroptosis in stromal cells and then elevates ER stress signaling in endometriotic lesions.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    Bufalin is an activator of the SRC-1 isoform, whereas it acts as an inhibitor against full-length SRC-1.

    “Therefore, bufalin is an activator of the SRC-1 isoform, whereas it acts as an inhibitor against full-length SRC-1.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    Over-stimulating the endometriosis-promoting SRC-1 isoform using bufalin could kill endometriotic lesions by promoting ER stress induced by pyroptosis, similar to MCB613.

    “In the same context, therefore, over-stimulating the endometriosis-promoting SRC-1 isoform using bufalin could kill endometriotic lesions by promoting ER stress induced by pyroptosis, similar to MCB613.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    To prevent apoptosis in endometriotic lesions, both the SRC-1 isoform and ERβ axis are required because the SRC-1 isoform/ERβ complex interacts with the apoptosis machinery in endometriotic lesions.

    “To prevent apoptosis in endometriotic lesions, both the SRC-1 isoform and ERβ axis are required because the SRC-1 isoform/ERβ complex interacts with the apoptosis machinery in endometriotic lesions (Han et al. 2015).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Han et al. 2015

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    Even though bufalin elevated SRC-1 isoform function in endometriotic lesions, bufalin did not prevent apoptosis in endometriotic lesions without ERβ and then reactivated apoptosis signaling.

    “Even though bufalin elevated SRC-1 isoform function in endometriotic lesions, however, bufalin did not prevent apoptosis in endometriotic lesions without ERβ and then reactivated apoptosis signaling.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    Bufalin treatment suppressed the growth of endometriotic lesions because ERβ levels were reduced in endometriotic lesions.

    “However, bufalin treatment suppressed the growth of endometriotic lesions because ERβ levels were reduced in endometriotic lesions.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Bufalin induces apoptosis and G0/G1 cell cycle arrest in endometriotic stromal cells in vitro.

    “In addition to cancer cells, bufalin also induces apoptosis and G0/G1 cell cycle arrest in endometriotic stromal cells in vitro (Nasu, et al. 2005).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Nasu, et al. 2005

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Bufalin inhibits SRC-1 and SRC-3 functions by degrading their protein levels and inhibiting their intrinsic transcriptional activities in various cancer cells.

    “Bufalin inhibits SRC-1 and SRC-3 functions by degrading their protein levels and inhibiting their intrinsic transcriptional activities in various cancer cells (Wang et al. 2014).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Wang et al. 2014

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Interpretationreasoning

    Further activation of the SRC-1 isoform in endometriotic lesions might stimulate endometriosis progression.

    “Since the SRC-1 isoform has an essential role in endometriosis progression, further activation of the SRC-1 isoform in endometriotic lesions might stimulate endometriosis progression.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationcitation

    The molecular effects of bufalin on the SRC-1 isoform are quite similar to those of MCB613.

    “The first explanation is that the molecular effects of bufalin on the SRC-1 isoform are quite similar to those of another newly discovered small molecule named MCB613.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Wang, et al. 2015

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    ERβ should be the best target to suppress endometriosis progression because deactivation of ERβ could reactivate TNFα-induced apoptosis signaling only in endometriotic lesions to suppress their growth.

    “Therefore, ERβ should be the best target to suppress endometriosis progression because the deactivation of ERβ could reactivate TNFα-induced apoptosis signaling only in endometriotic lesions to suppress their growth.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    In endometriotic tissues, PSMD2 specifically recognizes ERβ, an essential endometriosis driver, and then degrades it to suppress the ERβ-regulated gene signature that is required for endometriosis progression.

    “In endometriotic tissues, therefore, PSMD2 specifically recognizes ERβ, an essential endometriosis driver, and then degrades it to suppress the ERβ-regulated gene signature that is required for endometriosis progression.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: PSMD2 is a component of the 19S regulatory component and is responsible for substrate recognition and binding.
  • May combine two claims.

    Premisecitation

    ERα has critical roles in estrogen target tissues in addition to endometriosis progression, and estrogen deficiency affects different tissues, resulting in an increase in various diseases such as osteoporosis or cardiovascular diseases.

    “ERα has critical roles in estrogen target tissues in addition to endometriosis progression, and estrogen deficiency affects different tissues, resulting in an increase in various diseases such as osteoporosis or cardiovascular diseases (Valera, et al. 2015).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Valera, et al. 2015

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The proteasome also has an essential role in cell death signaling.

    “In addition to survival functions, the proteasome also has an essential role in cell death signaling (Vacca, et al. 2007).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Vacca, et al. 2007

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    The bufalin/PSMD2/ERβ pathway should improve the specificity of endometriosis treatment and reduce side effects of the inhibition of ERα signaling by the current estrogen depletion therapy.

    “Therefore, the bufalin/PSMD2/ERβ pathway should improve the specificity of endometriosis treatment and reduce side effects of the inhibition of ERα signaling by the current estrogen depletion therapy.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    Bufalin significantly reduced ERβ levels in endometriotic lesions and then reactivated apoptosis signaling in epithelial cells from endometriotic lesions to suppress endometriosis progression.

    “Therefore, bufalin significantly reduced ERβ levels in endometriotic lesions and then reactivated apoptosis signaling in epithelial cells from endometriotic lesions to suppress the endometriosis progression.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Proteasome components have a crucial role in endometriosis progression because the proteasome inhibitor bortezomib suppresses endometriosis progression in a rat endometriosis model.

    “Consistent with the cancer progression, proteasome components also have a crucial role in endometriosis progression because the proteasome inhibitor bortezomib suppresses endometriosis progression in a rat endometriosis model (Celik, et al. 2008).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Celik, et al. 2008

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Elevation of PSMD2 levels drives the progression of various human diseases.

    “Interestingly, the elevation of PSMD2 levels drives the progression of various human diseases.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Matsuyama, et al. 2011

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    In lung cancer, elevated levels of PSMD2 and its gene signature are associated with acquisition of the metastatic phenotype and a poor prognosis because knockdown of PSMD2 decreases proteasome activity and induces growth inhibition and apoptosis in lung cancer cell lines.

    “In lung cancer, for example, elevated levels of PSMD2 and its gene signature are associated with acquisition of the metastatic phenotype and a poor prognosis because knockdown of PSMD2 decreases proteasome activity and induces growth inhibition and apoptosis in lung cancer cell lines (Matsuyama, et al. 2011).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Matsuyama, et al. 2011

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Pyroptosis, or caspase 1-dependent cell death, is known as inflammatory cell death signaling and is initiated by various pathological stimuli, such as stroke, heart attack or cancer.

    “Pyroptosis, or caspase 1-dependent cell death, is known as inflammatory cell death signaling and is initiated by various pathological stimuli, such as stroke, heart attack or cancer (Bergsbaken, et al. 2009).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Bergsbaken, et al. 2009

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Chronic treatment with a low dose of bufadienolides has been proven to be effective in certain instances, causing little to no side effects.

    “Chronic treatment with a low dose of bufadienolides has been proven to be effective in certain instances, causing little to no side effects (Jing, et al. 1994; Panesar 1992).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Jing, et al. 1994

      Not checked in the free run.

    • cites Panesar 1992

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    Bufalin treatment elevates hyper-releasing active forms of IL-1β from pyroptotic stromal cells and enhances ER stress in endometriotic lesions to effectively suppress the growth of endometriotic lesions along with activation of apoptosis in epithelial cells of endometriotic lesions.

    “Therefore, bufalin treatment elevates hyper-releasing active forms of IL-1β from pyroptotic stromal cells and enhances ER stress in endometriotic lesions to effectively suppress the growth of endometriotic lesions along with activation of apoptosis in epithelial cells of endometriotic lesions.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    IL-1β signaling has been known as a double-edged sword because the elevation of the active form of IL-1β results in proliferative activity in certain cases but also induces cell death signaling in other cases.

    “IL-1β signaling has been known as a double-edged sword because the elevation of the active form of IL-1β results in proliferative activity in certain cases but also induces cell death signaling in other cases (Kolb, et al. 2014).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Kolb, et al. 2014

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Despite this known cytotoxic property, bufadienolides have been used to treat cardiovascular and kidney diseases.

    “Despite this known cytotoxic property of bufadienolides, however, they have been used to treat cardiovascular and kidney diseases (Puschett, et al. 2010).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Puschett, et al. 2010

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Bufalin belongs to the bufadienolide group, and bufadienolides are known for having deleterious cardiovascular side effects due to their inhibition of the transport enzyme Na+/K+-adenosine triphosphatase.

    “Bufalin belongs to the bufadienolide group, and bufadienolides are known for having deleterious cardiovascular side effects due to their inhibition of the transport enzyme Na+/K+-adenosine triphosphatase (Xu, et al. 2016).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Xu, et al. 2016

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    Bufalin has potential cardiac ion channel toxicity so it is not an ideal candidate drug with which to go forward.

    “We know, however, that bufalin has potential cardiac ion channel toxicity so it is not an ideal candidate drug with which to go forward.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Bufalin has potential cardiac ion channel toxicity.
46 of 46
  • The paper relies on this without support.

    The surgically induced mouse model of endometriosis is representative of human endometriosis for evaluating bufalin's effects.

    “Endometriosis in mice was surgically induced under aseptic conditions under anesthesia using a modified method as described previously (Cummings and Metcalf 1995).”
  • The paper relies on this without support.

    Findings from human endometrial cell lines and mouse models can be extrapolated to human patients for endometriosis treatment.

    “Therefore, future generations of SRC-modulators could be employed as an alternative medical approach for endometriosis treatment.”
  • The paper relies on this without support.

    More detailed studies have not been conducted to evaluate whether bufalin can be employed as an alternative medicine for endometriosis treatment.

    “However, more detailed studies have not been conducted to evaluate whether bufalin can be employed as an alternative medicine for endometriosis treatment.”
  • The paper relies on this without support.

    PSMD2 is a component of the 19S regulatory component and is responsible for substrate recognition and binding.

    “PSMD2 is a component of the 19S regulatory component and is responsible for substrate recognition and binding.”
  • The paper relies on this without support.

    The role of pyroptosis in endometriosis progression has not been reported.

    “However, the role of pyroptosis in endometriosis progression has not been reported.”
  • The paper relies on this without support.

    Bufalin has potential cardiac ion channel toxicity.

    “We know, however, that bufalin has potential cardiac ion channel toxicity so it is not an ideal candidate drug with which to go forward.”
6 of 6

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Lentiviral plasmid has two different names

    Minor

    The construct is described as cloned into pCDH-pCMV, but the subsequent transfection names pCDH-pCNV-SRC-1 isoform. No intervening change of vector is described.

  • Epithelial and stromal cell labels are reversed

    Minor

    The methods identify IHESCs as stromal cells and IHEECs as epithelial cells, but the results assign those identities in the opposite order.

2 of 2

Cites

Flagged first, then by citations

Research works printed but not linked: 46

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  5. 2010, 17Beta-hydroxysteroid dehydrogenase-2 deficiency and progesterone resistance in endometriosis, Seminars in Reproductive Medicine, 28, 44, 10.1055/s-0029-1242992 · DOI · Paper page
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  11. 2014, ERbeta- and prostaglandin E2-regulated pathways integrate cell proliferation via Ras-like and estrogen-regulated growth inhibitor in endometriosis, Molecular Endocrinology, 28, 1304, 10.1210/me.2013-1421 · DOI · Paper page
  12. 2007, Proteasome function is required for activation of programmed cell death in heat shocked tobacco Bright-Yellow 2 cells, FEBS Letters, 581, 917, 10.1016/j.febslet.2007.01.071 · DOI
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Cited by

Sorted by citations

Authors
Cho, Y. J., Lee, J. E., Park, M. J., O’Malley, B. W., & Han, S. J.
Affiliations
Baylor College of Medicine (US)
Corresponding author
Han, Sang Jun
Venue
Journal of Endocrinology
Published
2018-06
Volume
237
Issue
3
Pages
255-269
ISSN
  • 0022-0795 (ISSN-L)
  • 1479-6805
OpenAlex
W2797374082
Cited by
37
References
46
Citations by year
2026: 4 · 2025: 2 · 2024: 6 · 2023: 6 · 2022: 3 · 2021: 10 · 2020: 1 · 2019: 3 · 2018: 1
FWCI
4.01
Type
journal article
Language
en
Open access
Locations
  • Journal of Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Hogg Foundation for Mental Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (U24DK097748, DK097748)
  • National Institute of Child Health and Human Development
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD082786, R01HD008188)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Endometriosis Research and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
bufalin, endometriosis, pyroptosis, apoptosis, estrogen receptor beta, steroid receptor coactivators, endometrial stromal cells, endometrial epithelial cells, caspase-1, IL-1β, endoplasmic reticulum stress, protein disulfide isomerase, BAIAP2, proteasomal degradation, endometriosis treatment
MeSH terms
Pyroptosis, Animals, Bufanolides, Cells, Cultured, Endometriosis, Endometrium, Female, Fertility, HeLa Cells, Humans, Litter Size, Mice, Inbred C57BL, Pregnancy, Uterine Diseases, Signal Transduction, Down-Regulation, Stromal Cells, Apoptosis, Disease Progression, Mice

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