Sensitivity of Pegfilgrastim Pharmacokinetic and Pharmacodynamic Parameters to Product Differences in Similarity Studies

Brekkan, AriUppsala universitet,Institutionen för farmaceutisk biovetenskap,Pharmetheus, Uppsala, Sweden (författare)

In this work, a previously developed pegfilgrastim (PG) population pharmacokinetic-pharmacodynamic (PKPD) model was used to evaluate potential factors of importance in the assessment of PG PK and PD similarity. Absolute neutrophil count (ANC) was the modelled PD variable. A two-way cross-over study was simulated where a reference PG and a potentially biosimilar test product were administered to healthy volunteers. Differences in delivered dose amounts or potency between the products were simulated. A different baseline absolute neutrophil count (ANC) was also considered. Additionally, the power to conclude PK or PD similarity based on areas under the PG concentration-time curve (AUC) and ANC-time curve (AUEC) were calculated. Delivered dose differences between the products led to a greater than dose proportional differences in AUC but not in AUEC, respectively. A 10% dose difference from a 6 mg dose resulted in 51% and 7% differences in AUC and AUEC, respectively. These differences were more pronounced with low baseline ANC. Potency differences up to 50% were not associated with large differences in either AUCs or AUECs. The power to conclude PK similarity was affected by the simulated dose difference; with a 4% dose difference from 6 mg the power was approximately 29% with 250 subjects. The power to conclude PD similarity was high for all delivered dose differences and sample sizes.

Plan, Elodie L.,1981-Dr. Reddy’s Laboratories, Basel, Switzerland.,Dr Reddys Labs, Basel, Switzerland,Pharmetheus, Uppsala, Sweden(Swepub:uu)elopl609 (författare)
Plan, Elodie L.,1981-Pharmetheus, Uppsala, Sweden(Swepub:uu)elopl609 (författare)
Nyberg, JoakimPharmetheus, Uppsala, Sweden. (författare)
Kankanwadi, SureshDr. Reddy’s Laboratories, Basel, Switzerland.,Dr Reddys Labs, Basel, Switzerland (författare)
Karlsson, MatsUppsala universitet,Institutionen för farmaceutisk biovetenskap,Pharmetheus, Uppsala, Sweden(Swepub:uu)matskarl (författare)
Uppsala universitetInstitutionen för farmaceutisk biovetenskap (creator_code:org_t)

Av författaren/redakt...: Brekkan, Ari; Plan, Elodie L., ...; Nyberg, Joakim; Kankanwadi, Sure ...; Karlsson, Mats

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MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Medicinska och f ...; och Farmaceutiska ve ...

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