Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection Cannulae
With the use of cell replacement therapies as a realistic prospect for conditions such as Parkinson's and Huntington's diseases, the logistics of the delivery of cell suspensions to deep brain targets is a topic for consideration. Because of the large cannulae required for such procedures,...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2015-04-01
|
| Series: | Cell Transplantation |
| Online Access: | https://doi.org/10.3727/096368914X685429 |
| _version_ | 1819162326012526592 |
|---|---|
| author | Eduardo M. Torres Matthieu Trigano Tephen B. Dunnett |
| author_facet | Eduardo M. Torres Matthieu Trigano Tephen B. Dunnett |
| author_sort | Eduardo M. Torres |
| collection | DOAJ |
| description | With the use of cell replacement therapies as a realistic prospect for conditions such as Parkinson's and Huntington's diseases, the logistics of the delivery of cell suspensions to deep brain targets is a topic for consideration. Because of the large cannulae required for such procedures, we need to consider the behavior of cell suspensions within the cannulae if we are to ensure that the injected cells are distributed as intended within the target tissue. We have investigated the behavior of primary embryonic cell suspensions of neural tissue, in cannulae of different diameters, using a protocol designed to mimic the handling and injection of cells during clinical application. Internal cannula diameter had a large effect on the distribution of cells during their dispensation from the syringe. In vertical or near vertical cannulae, cells settled toward the tip of the needle, and were dispensed unevenly, with the majority of cells emerging in the first 10-20% of the injectate. In horizontal or near-horizontal cannulae, we observed the opposite effect, such that few cells were dispensed in the first 80% of the injectate, and the majority emerged in the final 10-20%. Use of a glass cannula showed that the results obtained using the horizontal cannula were caused by settling and adherence of the cells on the side of the cannulae, such that during dispensation, the overlying, cell-free solution was dispensed first, prior to the emergence of the cells. We show that the behavior of cells in such cannulae is affected by the cannula diameter, and by the material of the cannula itself. In horizontal cannulae, uneven expulsion of cells from the needle can be ameliorated by regular rotation of the cannula during the procedure. We discuss the potential impact of these observations on the translation of cell therapies to the clinic. |
| first_indexed | 2024-12-22T17:26:27Z |
| format | Article |
| id | doaj.art-70397f684da6497fa381151e6818f05b |
| institution | Directory Open Access Journal |
| issn | 0963-6897 1555-3892 |
| language | English |
| last_indexed | 2024-12-22T17:26:27Z |
| publishDate | 2015-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Cell Transplantation |
| spelling | doaj.art-70397f684da6497fa381151e6818f05b2022-12-21T18:18:42ZengSAGE PublishingCell Transplantation0963-68971555-38922015-04-012410.3727/096368914X685429Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection CannulaeEduardo M. Torres0Matthieu Trigano1Tephen B. Dunnett2 Cardiff University, Biomedical Sciences, Cardiff, UK Université Pierre et Marie Curie, Paris, France Cardiff University, Biomedical Sciences, Cardiff, UKWith the use of cell replacement therapies as a realistic prospect for conditions such as Parkinson's and Huntington's diseases, the logistics of the delivery of cell suspensions to deep brain targets is a topic for consideration. Because of the large cannulae required for such procedures, we need to consider the behavior of cell suspensions within the cannulae if we are to ensure that the injected cells are distributed as intended within the target tissue. We have investigated the behavior of primary embryonic cell suspensions of neural tissue, in cannulae of different diameters, using a protocol designed to mimic the handling and injection of cells during clinical application. Internal cannula diameter had a large effect on the distribution of cells during their dispensation from the syringe. In vertical or near vertical cannulae, cells settled toward the tip of the needle, and were dispensed unevenly, with the majority of cells emerging in the first 10-20% of the injectate. In horizontal or near-horizontal cannulae, we observed the opposite effect, such that few cells were dispensed in the first 80% of the injectate, and the majority emerged in the final 10-20%. Use of a glass cannula showed that the results obtained using the horizontal cannula were caused by settling and adherence of the cells on the side of the cannulae, such that during dispensation, the overlying, cell-free solution was dispensed first, prior to the emergence of the cells. We show that the behavior of cells in such cannulae is affected by the cannula diameter, and by the material of the cannula itself. In horizontal cannulae, uneven expulsion of cells from the needle can be ameliorated by regular rotation of the cannula during the procedure. We discuss the potential impact of these observations on the translation of cell therapies to the clinic.https://doi.org/10.3727/096368914X685429 |
| spellingShingle | Eduardo M. Torres Matthieu Trigano Tephen B. Dunnett Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection Cannulae Cell Transplantation |
| title | Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection Cannulae |
| title_full | Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection Cannulae |
| title_fullStr | Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection Cannulae |
| title_full_unstemmed | Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection Cannulae |
| title_short | Translation of Cell Therapies to the Clinic: Characteristics of Cell Suspensions in Large-Diameter Injection Cannulae |
| title_sort | translation of cell therapies to the clinic characteristics of cell suspensions in large diameter injection cannulae |
| url | https://doi.org/10.3727/096368914X685429 |
| work_keys_str_mv | AT eduardomtorres translationofcelltherapiestothecliniccharacteristicsofcellsuspensionsinlargediameterinjectioncannulae AT matthieutrigano translationofcelltherapiestothecliniccharacteristicsofcellsuspensionsinlargediameterinjectioncannulae AT tephenbdunnett translationofcelltherapiestothecliniccharacteristicsofcellsuspensionsinlargediameterinjectioncannulae |