Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate

Microencapsulation is a promising technique to form microtissues. The existing cell microencapsulation technologies that involved extrusion and vibration are designed with complex systems and required the use of high energy. A micro-extruder with an inclusion of simple vibrator that has the commerci...

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Main Author:	Md Sai'aan, Nurul Hamizah
Format:	Thesis
Language:	English English English
Published:	2017
Subjects:	RC581-951 Specialties of internal medicine
Online Access:	http://eprints.uthm.edu.my/7828/2/24p%20NURUL%20HAMIZAH%20MD%20SAI%27AAN.pdf http://eprints.uthm.edu.my/7828/1/NURUL%20HAMIZAH%20MD%20SAI%27AAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/7828/3/NURUL%20HAMIZAH%20MD%20SAI%27AAN%20WATERMARK.pdf
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spelling	my-uthm-ep.78282022-10-12T02:23:30Z Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate 2017-09 Md Sai'aan, Nurul Hamizah RC581-951 Specialties of internal medicine Microencapsulation is a promising technique to form microtissues. The existing cell microencapsulation technologies that involved extrusion and vibration are designed with complex systems and required the use of high energy. A micro-extruder with an inclusion of simple vibrator that has the commercial value for creating a 3D cell model has been developed in this work. This system encapsulates human keratinocytes (HaCaT) in calcium alginate and the size of the microcapsules is controllable in the range of 500-800 µm by varying the flow rates of the extruded solution and frequency of the vibrator motor ( I 0-63 Hz). At 0.13 ml/min of flow rate and vibration rate of 26.4 Hz, approximately 40 ± IO pieces of the alginate microcapsules in a size 632.14 ± I 0.35 µm were produced. Approximately I 00 µm suspension of cells at different cells densities of 1.55 x I 05 cells/ml and 1.37 x I 07 cells/ml were encapsulated for investigation of microtissues formation. Fourier transform infrared spectroscopy (FTIR) analysis showed the different functional groups and chemistry contents of the calcium alginate with and without the inclusion of HaCaT cells in comparison to the monolayers of HaCaT cells. From Field Emission Scanning Electron Microscope (FESEM) imaging, calcium alginate microcapsules were characterised by spherical shape and homogenous surface morphology. Via the nuclei staining, the distance between cells was found reduced as the incubation period increased. This indicated that the cells merged into microtissues with good cell-cell adhesions. After 15 days of culture, the cells were still viable as indicated by the fluorescence green expression of calceinacetoxymethyl. Replating experiment indicated that the cells from the microtissues were able to migrate and has the tendency to form monolayer of cells on the culture flask. The system was successfully developed and applied to encapsulate cells to produce 3D microtissues. 2017-09 Thesis http://eprints.uthm.edu.my/7828/ http://eprints.uthm.edu.my/7828/2/24p%20NURUL%20HAMIZAH%20MD%20SAI%27AAN.pdf text en public http://eprints.uthm.edu.my/7828/1/NURUL%20HAMIZAH%20MD%20SAI%27AAN%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/7828/3/NURUL%20HAMIZAH%20MD%20SAI%27AAN%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	RC581-951 Specialties of internal medicine
spellingShingle	RC581-951 Specialties of internal medicine Md Sai'aan, Nurul Hamizah Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate
description	Microencapsulation is a promising technique to form microtissues. The existing cell microencapsulation technologies that involved extrusion and vibration are designed with complex systems and required the use of high energy. A micro-extruder with an inclusion of simple vibrator that has the commercial value for creating a 3D cell model has been developed in this work. This system encapsulates human keratinocytes (HaCaT) in calcium alginate and the size of the microcapsules is controllable in the range of 500-800 µm by varying the flow rates of the extruded solution and frequency of the vibrator motor ( I 0-63 Hz). At 0.13 ml/min of flow rate and vibration rate of 26.4 Hz, approximately 40 ± IO pieces of the alginate microcapsules in a size 632.14 ± I 0.35 µm were produced. Approximately I 00 µm suspension of cells at different cells densities of 1.55 x I 05 cells/ml and 1.37 x I 07 cells/ml were encapsulated for investigation of microtissues formation. Fourier transform infrared spectroscopy (FTIR) analysis showed the different functional groups and chemistry contents of the calcium alginate with and without the inclusion of HaCaT cells in comparison to the monolayers of HaCaT cells. From Field Emission Scanning Electron Microscope (FESEM) imaging, calcium alginate microcapsules were characterised by spherical shape and homogenous surface morphology. Via the nuclei staining, the distance between cells was found reduced as the incubation period increased. This indicated that the cells merged into microtissues with good cell-cell adhesions. After 15 days of culture, the cells were still viable as indicated by the fluorescence green expression of calceinacetoxymethyl. Replating experiment indicated that the cells from the microtissues were able to migrate and has the tendency to form monolayer of cells on the culture flask. The system was successfully developed and applied to encapsulate cells to produce 3D microtissues.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Md Sai'aan, Nurul Hamizah
author_facet	Md Sai'aan, Nurul Hamizah
author_sort	Md Sai'aan, Nurul Hamizah
title	Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate
title_short	Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate
title_full	Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate
title_fullStr	Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate
title_full_unstemmed	Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate
title_sort	development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2017
url	http://eprints.uthm.edu.my/7828/2/24p%20NURUL%20HAMIZAH%20MD%20SAI%27AAN.pdf http://eprints.uthm.edu.my/7828/1/NURUL%20HAMIZAH%20MD%20SAI%27AAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/7828/3/NURUL%20HAMIZAH%20MD%20SAI%27AAN%20WATERMARK.pdf
_version_	1747831198818762752

Development of a micro-extruder with vibration mode for microencapsulation of human keratinocytes in calcium alginate

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