X
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

Engagement of CD99 Activates Distinct Programs in Ewing Sarcoma and Macrophages.

Maria Cristina Manara | Cristina Manferdini | Camilla Cristalli | Marianna Carrabotta | Spartaco Santi | Alessandra De Feo | Giulia Caldoni | Michela Pasello | Lorena Landuzzi | Pier-Luigi Lollini | Francesca Salamanna | Sabrina Dominici | Valentina Fiori | Mauro Magnani | Gina Lisignoli | Katia Scotlandi
Cancer immunology research | 2024

Ewing sarcoma (EWS) is the second most common pediatric bone tumor. The EWS tumor microenvironment is largely recognized as immune-cold, with macrophages being the most abundant immune cells and their presence associated with worse patient prognosis. Expression of CD99 is a hallmark of EWS cells, and its targeting induces inhibition of EWS tumor growth through a poorly understood mechanism. In this study, we analyzed CD99 expression and functions on macrophages and investigated whether the concomitant targeting of CD99 on both tumor and macrophages could explain the inhibitory effect of this approach against EWS. Targeting CD99 on EWS cells downregulated expression of the "don't eat-me" CD47 molecule but increased levels of the "eat-me" phosphatidyl serine and calreticulin molecules on the outer leaflet of the tumor cell membrane, triggering phagocytosis and digestion of EWS cells by macrophages. In addition, CD99 ligation induced reprogramming of undifferentiated M0 macrophages and M2-like macrophages toward the inflammatory M1-like phenotype. These events resulted in the inhibition of EWS tumor growth. Thus, this study reveals what we believe to be a previously unrecognized function of CD99, which engenders a virtuous circle that delivers intrinsic cell death signals to EWS cells, favors tumor cell phagocytosis by macrophages, and promotes the expression of various molecules and cytokines, which are pro-inflammatory and usually associated with tumor regression. This raises the possibility that CD99 may be involved in boosting the antitumor activity of macrophages.

Pubmed ID: 38051221 RIS Download

Research resources used in this publication

Associated grants

  • Agency: Fondazione AIRC per la ricerca sul cancro ETS (AIRC),
    Id: IG2016-18451
  • Agency: Fondazione AIRC per la ricerca sul cancro ETS (AIRC),
    Id: IG2019–

Publication data is provided by the National Library of Medicine ® and PubMed ®. Data is retrieved from PubMed ® on a weekly schedule. For terms and conditions see the National Library of Medicine Terms and Conditions.

This is a list of tools and resources that we have found mentioned in this publication.


Clontech (tool)

RRID:SCR_004423

An Antibody supplier

View all literature mentions

Promega (tool)

RRID:SCR_006724

An Antibody supplier

View all literature mentions

Millipore (tool)

RRID:SCR_008983

An Antibody supplier

View all literature mentions

Miltenyi Biotec (tool)

RRID:SCR_008984

An Organization portal, Antibody supplier, Service resource,

View all literature mentions

BD Biosciences (tool)

RRID:SCR_013311

An Antibody supplier

View all literature mentions

New England Biolabs (tool)

RRID:SCR_013517

An Antibody supplier

View all literature mentions

Monoclonal Anti-beta-Tubulin I antibody produced in mouse (antibody)

RRID:AB_261770

This monoclonal targets beta-Tubulin I antibody produced in mouse

View all literature mentions

c-Jun (60A8) Rabbit mAb (antibody)

RRID:AB_2130165

This monoclonal targets JUND

View all literature mentions

c-Fos (9F6) Rabbit mAb (antibody)

RRID:AB_2247211

This monoclonal targets c-Fos

View all literature mentions

Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb (antibody)

RRID:AB_10950970

This monoclonal targets Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb

View all literature mentions

CD47 Antibody, anti-human, PE, REAfinity™ (antibody)

RRID:AB_2819520

This recombinant monoclonal targets CD47

View all literature mentions

Anti-Mannose Receptor antibody (antibody)

RRID:AB_1523910

This polyclonal targets Mannose Receptor

View all literature mentions

F4/80 (D2S9R) XP® Rabbit mAb (antibody)

RRID:AB_2799771

This recombinant monoclonal targets EMR1

View all literature mentions

Goat Anti-Rabbit IgG (H + L)-HRP Conjugate (antibody)

RRID:AB_11125142

This polyclonal secondary targets IgG (H+L)

View all literature mentions

MIC2 (12E7) (antibody)

RRID:AB_629249

This monoclonal targets Human CD99

View all literature mentions

PE/Cyanine7 anti-mouse F4/80 (antibody)

RRID:AB_893478

This monoclonal targets F4/80

View all literature mentions

GraphPad Prism (software resource)

RRID:SCR_002798

Statistical analysis software that combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization. Designed for biological research applications in pharmacology, physiology, and other biological fields for data analysis, hypothesis testing, and modeling.

View all literature mentions

GraphPad Prism (software resource)

RRID:SCR_002798

Statistical analysis software that combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization. Designed for biological research applications in pharmacology, physiology, and other biological fields for data analysis, hypothesis testing, and modeling.

View all literature mentions

Monoclonal Anti-beta-Tubulin I antibody produced in mouse (antibody)

RRID:AB_261770

This monoclonal targets beta-Tubulin I antibody produced in mouse

View all literature mentions

c-Jun (60A8) Rabbit mAb (antibody)

RRID:AB_2130165

This monoclonal targets JUND

View all literature mentions

c-Fos (9F6) Rabbit mAb (antibody)

RRID:AB_2247211

This monoclonal targets c-Fos

View all literature mentions

FCS Express (software resource)

RRID:SCR_016431

Software tool for flow and image cytometry data analysis by De Novo Software company.

View all literature mentions

Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb (antibody)

RRID:AB_10950970

This monoclonal targets Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb

View all literature mentions

FCS Express (software resource)

RRID:SCR_016431

Software tool for flow and image cytometry data analysis by De Novo Software company.

View all literature mentions

CD47 Antibody, anti-human, PE, REAfinity™ (antibody)

RRID:AB_2819520

This recombinant monoclonal targets CD47

View all literature mentions

ImageScope (data processing software)

RRID:SCR_014311

Slide image modification software that allows the user to adjust the magnification, compare slides, pan and zoom, annotate specific areas, and perform image analysis of digital slides. Users can create macros and algorithms to automate analysis and create plots, respectively.

View all literature mentions

ImageScope (data processing software)

RRID:SCR_014311

Slide image modification software that allows the user to adjust the magnification, compare slides, pan and zoom, annotate specific areas, and perform image analysis of digital slides. Users can create macros and algorithms to automate analysis and create plots, respectively.

View all literature mentions

Anti-Mannose Receptor antibody (antibody)

RRID:AB_1523910

This polyclonal targets Mannose Receptor

View all literature mentions

F4/80 (D2S9R) XP® Rabbit mAb (antibody)

RRID:AB_2799771

This recombinant monoclonal targets EMR1

View all literature mentions

Goat Anti-Rabbit IgG (H + L)-HRP Conjugate (antibody)

RRID:AB_11125142

This polyclonal secondary targets IgG (H+L)

View all literature mentions

MIC2 (12E7) (antibody)

RRID:AB_629249

This monoclonal targets Human CD99

View all literature mentions

PE/Cyanine7 anti-mouse F4/80 (antibody)

RRID:AB_893478

This monoclonal targets F4/80

View all literature mentions

LAP-35 (cell line)

RRID:CVCL_A096

Cell line LAP-35 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

LAP-35 (cell line)

RRID:CVCL_A096

Cell line LAP-35 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

SK-N-MC (cell line)

RRID:CVCL_0530

Cell line SK-N-MC is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

RD-ES (cell line)

RRID:CVCL_2169

Cell line RD-ES is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

RD-ES (cell line)

RRID:CVCL_2169

Cell line RD-ES is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

A-673 (cell line)

RRID:CVCL_0080

Cell line A-673 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

TC-71 (cell line)

RRID:CVCL_2213

Cell line TC-71 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

SK-N-MC (cell line)

RRID:CVCL_0530

Cell line SK-N-MC is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

A-673 (cell line)

RRID:CVCL_0080

Cell line A-673 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

TC-71 (cell line)

RRID:CVCL_2213

Cell line TC-71 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

SK-ES-1 (cell line)

RRID:CVCL_0627

Cell line SK-ES-1 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

6647 (cell line)

RRID:CVCL_H722

Cell line 6647 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

GraphPad Prism (software resource)

RRID:SCR_002798

Statistical analysis software that combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization. Designed for biological research applications in pharmacology, physiology, and other biological fields for data analysis, hypothesis testing, and modeling.

View all literature mentions

Monoclonal Anti-beta-Tubulin I antibody produced in mouse (antibody)

RRID:AB_261770

This monoclonal targets beta-Tubulin I antibody produced in mouse

View all literature mentions

c-Jun (60A8) Rabbit mAb (antibody)

RRID:AB_2130165

This monoclonal targets JUND

View all literature mentions

c-Fos (9F6) Rabbit mAb (antibody)

RRID:AB_2247211

This monoclonal targets c-Fos

View all literature mentions

Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb (antibody)

RRID:AB_10950970

This monoclonal targets Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb

View all literature mentions

FCS Express (software resource)

RRID:SCR_016431

Software tool for flow and image cytometry data analysis by De Novo Software company.

View all literature mentions

CD47 Antibody, anti-human, PE, REAfinity™ (antibody)

RRID:AB_2819520

This recombinant monoclonal targets CD47

View all literature mentions

ImageScope (data processing software)

RRID:SCR_014311

Slide image modification software that allows the user to adjust the magnification, compare slides, pan and zoom, annotate specific areas, and perform image analysis of digital slides. Users can create macros and algorithms to automate analysis and create plots, respectively.

View all literature mentions

Anti-Mannose Receptor antibody (antibody)

RRID:AB_1523910

This polyclonal targets Mannose Receptor

View all literature mentions

F4/80 (D2S9R) XP® Rabbit mAb (antibody)

RRID:AB_2799771

This recombinant monoclonal targets EMR1

View all literature mentions

Goat Anti-Rabbit IgG (H + L)-HRP Conjugate (antibody)

RRID:AB_11125142

This polyclonal secondary targets IgG (H+L)

View all literature mentions

MIC2 (12E7) (antibody)

RRID:AB_629249

This monoclonal targets Human CD99

View all literature mentions

PE/Cyanine7 anti-mouse F4/80 (antibody)

RRID:AB_893478

This monoclonal targets F4/80

View all literature mentions

LAP-35 (cell line)

RRID:CVCL_A096

Cell line LAP-35 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

RD-ES (cell line)

RRID:CVCL_2169

Cell line RD-ES is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

SK-N-MC (cell line)

RRID:CVCL_0530

Cell line SK-N-MC is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

A-673 (cell line)

RRID:CVCL_0080

Cell line A-673 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions

TC-71 (cell line)

RRID:CVCL_2213

Cell line TC-71 is a Cancer cell line with a species of origin Homo sapiens (Human)

View all literature mentions