Ph. Eur. testing for histamine and depressor substances using guinea-pigs and cats : the end of an era. Strategy for removal of animal tests for histamine and depressor substances and their vestiges from the Ph. Eur
© Council of Europe 2024..
For more than 50 years, in vivo assays have been used for testing pharmaceutical product safety due to their assumed ability to broadly detect potential unidentified contaminants. As part of these in vivo tests, the animal tests for depressor substances and histamine have been described in the European Pharmacopoeia since its first edition in 1977. Both tests measure the effect of histamine and histamine-like substances, using guinea-pigs and cats respectively. In 2024, the Histamine (2.6.10) general chapter is referenced in the Production section of four monographs and 10 monographs have variations of a sentence on designing the manufacturing process to eliminate or minimise substances lowering blood pressure in this same section, without referencing the chapter. The Depressor substances (2.6.11) chapter is referenced only in the Histamine (2.6.10) chapter as a next step if the histamine test is invalid. A historical search was performed and it has shown that the tests for histamine and for depressor substances were introduced by different groups of experts in an inconsistent way at different times, and for different reasons, leading to non-harmonised approaches across monographs. The control of histamine and other depressor substances has been the subject of numerous debates where their use was questioned. During these discussions, reports on positive cases or batches failing the test for histamine or depressor substances were anecdotal. In addition, in vivo tests can be considered non-specific, very variable, time-consuming, costly and ethically doubtful. More importantly, the majority of in vivo methods originate from a time when good manufacturing practice was not widely used and formal method validation requirements were not yet established. In view of the above, the removal of all references to animal tests for histamine or depressor substances from all texts still referring to them is proposed. Since the sentences in the Production section referring to the control of "substances lowering blood pressure", "vasoactive substances" or "hypotensive substances" appeared as remainders of the animal test without further guarantee of safety, it will also be proposed to remove all these sentences from the concerned monographs. Ultimately, the suppression of general chapters 2.6.10 and 2.6.11 from the Ph. Eur. is envisaged. Independently from the above, it is also envisaged to elaborate a new general chapter Histamine in active substances (2.5.47) to include physicochemical or immunochemical methods enabling the detection of histamine. This new text would aim at supporting manufacturers in their histamine control strategy following the inclusion of precaution statements in the general monograph on Products of fermentation (1468); these statements had been added in Ph. Eur. Supplements 9.6 and 10.4, following adverse events related to a GMP issue with gentamicin sulfate. This strategy has been endorsed by the European Pharmacopoeia Commission at its 177th Session in November 2023. The concerned monographs would be a subject of public consultation in Pharmeuropa 36.2 (April 2024).
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:2024 |
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| Enthalten in: |
Pharmeuropa bio & scientific notes - 2024(2024) vom: 01., Seite 12-26 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Bratos, M [VerfasserIn] |
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| Themen: |
3Rs |
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| Anmerkungen: |
Date Completed 28.03.2024 Date Revised 17.04.2024 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| 520 | |a For more than 50 years, in vivo assays have been used for testing pharmaceutical product safety due to their assumed ability to broadly detect potential unidentified contaminants. As part of these in vivo tests, the animal tests for depressor substances and histamine have been described in the European Pharmacopoeia since its first edition in 1977. Both tests measure the effect of histamine and histamine-like substances, using guinea-pigs and cats respectively. In 2024, the Histamine (2.6.10) general chapter is referenced in the Production section of four monographs and 10 monographs have variations of a sentence on designing the manufacturing process to eliminate or minimise substances lowering blood pressure in this same section, without referencing the chapter. The Depressor substances (2.6.11) chapter is referenced only in the Histamine (2.6.10) chapter as a next step if the histamine test is invalid. A historical search was performed and it has shown that the tests for histamine and for depressor substances were introduced by different groups of experts in an inconsistent way at different times, and for different reasons, leading to non-harmonised approaches across monographs. The control of histamine and other depressor substances has been the subject of numerous debates where their use was questioned. During these discussions, reports on positive cases or batches failing the test for histamine or depressor substances were anecdotal. In addition, in vivo tests can be considered non-specific, very variable, time-consuming, costly and ethically doubtful. More importantly, the majority of in vivo methods originate from a time when good manufacturing practice was not widely used and formal method validation requirements were not yet established. In view of the above, the removal of all references to animal tests for histamine or depressor substances from all texts still referring to them is proposed. Since the sentences in the Production section referring to the control of "substances lowering blood pressure", "vasoactive substances" or "hypotensive substances" appeared as remainders of the animal test without further guarantee of safety, it will also be proposed to remove all these sentences from the concerned monographs. Ultimately, the suppression of general chapters 2.6.10 and 2.6.11 from the Ph. Eur. is envisaged. Independently from the above, it is also envisaged to elaborate a new general chapter Histamine in active substances (2.5.47) to include physicochemical or immunochemical methods enabling the detection of histamine. This new text would aim at supporting manufacturers in their histamine control strategy following the inclusion of precaution statements in the general monograph on Products of fermentation (1468); these statements had been added in Ph. Eur. Supplements 9.6 and 10.4, following adverse events related to a GMP issue with gentamicin sulfate. This strategy has been endorsed by the European Pharmacopoeia Commission at its 177th Session in November 2023. The concerned monographs would be a subject of public consultation in Pharmeuropa 36.2 (April 2024) | ||
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