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Gynaecological cancers

4745 - A Double-blind, placebo-controlled, randomized, phase 2 study to evaluate the efficacy and safety of switch maintenance therapy with the anti-TA-MUC1 antibody PankoMab-GEX after chemotherapy in patients with recurrent epithelial ovarian carcinoma


08 Sep 2017


Gynaecological cancers


Immunotherapy;  Ovarian Cancer


Jonathan Ledermann


Annals of Oncology (2017) 28 (suppl_5): v605-v649. 10.1093/annonc/mdx440


J. Ledermann1, J. Sehouli2, B. Zurawski3, F. Raspagliesi4, U. De Giorgi5, S. Banerjee6, J. Arranz Arija7, M. Romeo Marin8, A. Lisyanskaya9, R.L. Póka10, S. Mihutiu11, J. Markowska12, C. Cebotaru13, A. Casado Herraez14, N. Colombo15, N. Kovalenko16, E. Kutarska17, M. Hall18, R. Belli19, A. Zurlo19

Author affiliations

  • 1 Gynaecological Oncology, UCL Cancer Institute, University College London, WC1E6BT - London/GB
  • 2 Department Of Gynecology And Gynecologic Oncology, Charité Campus Virchow Klinikum, Berlin/DE
  • 3 Oncology Department, Franciszek Lukaszczyk Oncology Center, Bydgoszcz/PL
  • 4 Gynecologic Surgery, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan/IT
  • 5 Department Of Oncology, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 - Meldola/IT
  • 6 Gynaecology Unit, Royal Marsden Hospital NHS Foundation Trust, SW3 6JJ - London/GB
  • 7 Medical Oncology, Hospital General Universitario Gregorio Marañon, 28007 - Madrid/ES
  • 8 Medical Oncology, Catalan Institute of Oncology (ICO Badalona), Hospital Germans Trias i Pujol, 8916 - Badalona/ES
  • 9 Department Of Oncogynecology, St.-Petersburg Oncological City Hospital, 198255 - St.-Petersburg/RU
  • 10 Gynaecologic Oncology, Debrecen University Clinical Center, 4032 - Debrecen/HU
  • 11 Oncology Department, SPITALUL CLINIC MUNICIPAL "DR GAVRIL CURTEANU", 410469 - Oradea/RO
  • 12 Klinika Onkologii, ODDZIAL GINEKOLOGII ONKOLOGICZNEJ, 60-569 - Poznan/PL
  • 13 Radioterapie, INSTITUTUL ONCOLOGIC "PROF DR IOAN CHIRICUTA", 400015 - Cluj-Napoca/RO
  • 14 Department Of Medical Oncology, Hospital Clinico Universitario San Carlos, 28040 - Madrid/ES
  • 15 Division Of Medical Gynecologic Oncology, European Institute of Oncology and University of Milano-Bicocca, Milan/IT
  • 16 Oncology Department, Volgograd Regional Oncology Dispensaryc No. 3, 404130 - Volzhskiy/RU
  • 17 Iii Oddzial Ginekologii Onkologicznej, CENTRUM ONKOLOGII ZIEMI LUBELSKIEJ, PL-20-090 - Lublin/PL
  • 18 Mount Vernon Cancer Centre, East and North Hertfordshire NHS Trust, HA6 2RN - Middlesex/GB
  • 19 Clinical Development, Glycotope GmbH, 13125 - Berlin/DE


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Abstract 4745


PankoMab-GEX (PMG) is a glyco-engineered humanized monoclonal antibody recognizing the carbohydrate-induced tumor-associated epitope mucin 1 (TA-MUC1). A phase I study showed safety and tolerability of PMG in patients with TA-MUC1 positive advanced solid malignancies. The aim of the present phase 2 study is to evaluate the efficacy and safety of maintenance therapy with PMG compared to placebo in patients with recurrent ovarian, fallopian tube or primary serous peritoneal cancer.


In this placebo-controlled phase 2 study PMG was given as switch maintenance therapy, after response or absence of tumor progression following chemotherapy (CT) in tumors that are TA-MUC1 positive on archival tissue. Stratification criteria are ‘resistance’ (progression-free survival (PFS) 0 - < 6 months) vs. ‘partial sensitivity‘(PFS 6-12 months) to the most recent platinum-based CT; number of prior CT lines (2 vs. 3-5); response or stable disease after last CT. Patients were randomized 2:1 to receive intravenous PMG (500mg and 1 week later a dose of 1700mg) or placebo (Pl) repeated every 3 weeks until tumor progression or toxicity. Primary endpoint is PFS by immune related response criteria (irRC) based on modified RECIST 1.1. Secondary endpoints include PFS and PFS at 6 months by RECIST, safety, overall response rate, CA125 progression; overall survival; QoL; pharmacokinetics.


From 2014 to 2016, 216 pts were randomized to PMG (n = 151) or placebo (Pl) (n = 65) (see demographics in table 1). No difference was observed for the primary endpoint of PFS by irRC (median 15.3 and 15.0 weeks for PMG and Pl respectively) [HR: 0.958 (95% CI: 0.690-1.331) p = 0.7988]. No advantage for PMG over Pl was observed for all other secondary efficacy endpoints and subgroup analysis by stratification factors. PMG was well tolerated, with grade 1-2 infusion related reactions being the most common AE.Table:

LBA41 Patient Demographics

081 (54.4%)30 (46.9%)111 (52.1%)
168 (45.6%)34 (53.1%)102 (47.9%)
Tumor Stage
IIIC55 (36.9%)25 (39.1%)80 (37.6%)
IV51 (34.2%)22 (34.4%)73 (34.3%)
Response to previous treatment
CR/PR87 (58.4%)33 (51.6%)120 (56.3%)
SD/NOT assessable62 (41.6%)31 (48.4%)93 (43.7%)
Number of previous treatment
250 (33.6%)24 (37.5%)74 (34.7%)
≥399 (66.4%)40 (62.5%)139 (65.3%)
Duration of previous treatment
≤6 months67 (45.0%)27 (42.2%)94 (44.1%)
>6 ≤12 months82 (55.0%)37 (57.8%)119 (55.9%)


This study shows that PMG switch maintenance does not improve outcome in ovarian cancer TA-MUC1 positive patients.

Clinical trial identification

: NCT01899599

Legal entity responsible for the study

Glycotope GmbH


Glycotope GmbH


U. De Giorgi: Speaker honorarium or travel support from Astellas, Janssen-Cilag and Sanofi-Aventis. N. Colombo: Attended advisory board meetings for Astra Zeneca, Roche, Pharmamar, Tesaro, Clovis, Pfizer, Advaxis. All other authors have declared no conflicts of interest.

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