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819 Lenograstim and Filgrastim Have a Similar Efficacy and Safety Profile in the Treatment of Chronic Neutropenia. a Study for the French SCN Registry:Clinically Relevant Abstract

Program: Oral and Poster Abstracts
Session: 201. Granulocytes, Monocytes, and Macrophages: Poster I
Hematology Disease Topics & Pathways:
Biological, Adult, Diseases, Therapies, Genetic Disorders, Adverse Events, Pediatric, Young Adult, immunotherapy, Study Population, Clinically relevant
Saturday, December 5, 2020, 7:00 AM-3:30 PM

Jean Donadieu, MD, PhD1, Blandine Beaupain2*, Fares bou Mitri3*, Flore Sicre de Fontbrune4,5,6,7*, Despina Moushous, MD, PhD8*, Thierry Lamy, PhD, MD9,10,11, Aline Moignet Autrel, MD12*, Elodie Gouache13*, Marlène Pasquet, M.D., Ph.D.14* and Christine Bellanne-Chantelot, PhD, PharmD15*

1Service d'Hémato-Oncologie Pédiatrique, Hopital Trousseau, Paris, Cedex, France
2Registre francais des neutropénies chroniques, HôPital Trousseau, France, FRA
3Centre de référence des neutropénies chroniques Registre des neutropenies, Hopital Trousseau, Paris, France
4Hematology and transplantation unit, Saint-Louis Hospital, Paris, France
5Centre de Référence Aplasie Médullaire, Service d’Hématologie Greffe, Assistance Publique des Hôpitaux de Paris, Hôpital Saint-Louis, Paris, France
6French Reference Center for Aplastic Anemia and Paroxysmal Nocturnal Hemoglobinuria, Saint Louis Hospital and University Paris Diderot, Paris, France
7St-Louis Hospital, APHP, Bone Marrow Transplantation Unit, Paris, France
8Unité d'immuno hématologie rhumatologie pédiatrique, APHP université de Paris Hopital Necker enfants malades, Paris, France
9UMR U1236, Rennes, France
10INSERM CIC 1414, Hospital Pontchaillou, Rennes, France
11Department of Hematology, INSERM U917/University Hospital of Rennes, Rennes, France
12Clinical Hematology Department, Rennes CHU, Rennes, France
13Department of Pediatric Hemato-Oncology, Hospital Armand Trousseau, Paris, Franc, Paris, ESP
14Pediatric Oncology Immunology Hematology Unit, Children’s hospital, CHU de Toulouse, Toulouse, France
15Hopital Pitié Salpétriére APHP, Département de Génétique, AP-HP Hôpital Pitié- Salpêtrière, UPMC Univ Paris 06, Paris, France

Introduction: GCSF is a key drug in the medical management of chronic neutropenia (ChrN). Two major marketed forms of G-CSF are used. Filgrastim (F), marketed initially with the brand name Neupogen®;, now available with generic presentation, is a non-glycosylated GCSF. A pegylated (PegF) formulation of F exists too. Lenograstim (L) is the second form of bio-engineering GCSF and is glycosylated and marketed with the brand name Granocyte®. L is distributed in 263 µg and 105 µg vials while F is distributed in 300 and 480 µg vials. L and F have a similar PK profile (1/2 time ~3.7 h), contrary to PegF (1/2 time 42H). Here we compare the efficacy and safety of F and L in ChrN.

METHODS The French Severe Chronic Neutropenia Registry (FSCNR) since 1993 prospectively monitors patients with ChrN and collects routinely information about G-CSF therapy (type of product including the Brand names, dose per injection, number of injections, duration of the period of daily treatment, infections, blood counts, side effects..)(1). On 1 October 2019, the FSCNR had enrolled 1068 patients with ChrN (idiopathic neutropenia(2) n=231 and Congenital neutropenia(3) n=837 patients). To take into account individual changes in G-CSF regimens, for a given patient, treatment was divided into elementary periods during which the characteristics of G-CSF treatment remained constant. Several parameters were calculated by summing up the elementary periods: duration of follow-up after G-CSF start, Cumulative duration, Cumulative dose, Time averaged dose (TAD). Three treatment groups were defined according to the type of G-CSF received: “group F” for patients who received only F, “group L” for patients who received only L , “group FL” for patients who received both F and L in succession. As there are no guidelines for GCSF prescription (F or L), even if L is here prescribed off-labelled, treating physician made is own choice. Because PegF have a very specific PK profile, we excluded the Peg F periods from this analysis (only 29 patients have received PegF as part of their therapy). The analysis presented here is limited only to the “L group’, the “F group’ and the “FL group’. 434 of the 1068 patients with ChrN have received a GCSF therapy: 172 received Lenograstim alone (group L), 148 Filgrastim alone (group F) and 112 received both cytokines consecutively (group FL).

RESULTS: The key parameters defining the disease, the severity of the clinical and hematological presentation, the median neutrophil count, the proportion of patients with bone marrow blockage and the number of severe and oral infections was similar between the 3 patient groups (table 1). For group FL and more over the L group the median age at the start of G-CSF was younger (p<0.001). Such differences may be related to the availability, for L, of a smaller vial, more adapted to the prescription of GCSF in infants. At contrary, the TAD received by the patients was similar between the 3 treatment groups (5.5 µg/kg vs 5 and 5 in FL, L and F respectively, p=0.14). With regards to the efficacy, by taking in consideration both hematological parameters like neutrophil count, the rate of failure, as well clinical endpoints like the rate of stomatological and severe infections, we failed to find any differences between L and F groups and among the FL group, between F and L periods. Lastly, rate of side effects, both major side effects like death (mostly not related to GCSF), Myelodysplasia or leukemia, or mild, like bone pains were not different between F and L. Patients from FL have a higher rate of side effects, probably because physicians tried to avoid minor side effects by drug switch.

Conclusions: The efficacy profile as well as the safety profile of Lenograstim is indistinguishable from that of Filgrastim in ChrN. The availability of Lenograstim in small vial represent a pragmatic advantage to treat infants as well as patients who are requiring only little amount of GCSF.


  1. J. Donadieu et al., Haematologica 90, 45 (2005).
  2. F. Sicre De Fontbrune et al., Blood 126, 1643 (2015).
  3. J. Donadieu, B. Beaupain, O. Fenneteau, C. Bellanne-Chantelot, Br. J. Haematol. 179, 557 (2017).

Acknowledgments: The French SCN registry is supported by grants from Amgen, Chugai, Prolong Pharma, X4 Pharma, Inserm, the Association 111 les Arts, the Association RMHE, the Association Sportive de Saint Quentin Fallavier. The authors thank the association IRIS and Mrs Grosjean and Mr Gonnot(ASSQF), the association Barth France for their support.

Disclosures: Sicre de Fontbrune: Alexion Pharmaceuticals Inc.: Honoraria, Research Funding.

*signifies non-member of ASH