Abstract
Encapsulation of neurosecretory cells within a semipermeable membrane may possibly isolate the enclosed cells from the host immune system and allow inward diffusion of nutrients and outward diffusion of neurotransmitters. Moreover, the encapsulation procedure may prevent the tumor formation of enclosed cells, when they are derived from tumor cells. In the present study, PC12 cells, a dopaminergic cell line derived from a rat pheochromocytoma, were enclosed within in agarose/poly (styrene sulfonic acid) (agarose/PSSa) mixture and transplanted into the brains of rats (allogeneic transplantation) or guinea pigs (xenogeneic transplantation). Tyrosine hydroxylase (TH) immunoreactive PC12 cells within the microcapsules were observed in all rats and guinea pigs at least up to five weeks after transplantation. PC12 cells were round in shape and of relatively uniform small size. Although PC12 cells occasionally formed cell clusters, the formation of a tumor was not observed. The host reaction to agarose/PSSa microcapsules was minimum. The degree of glial fibrillary acidic protein (GFAP) positive astrocyte density around the microcapsules was similar to that around injection marks. There was no apparent immunological rejection around the capsules. High-performance liquid chromatography with electrochemical detection (HPLC-EC) showed basal and potassium-evoked release of dopamine from the PC12 cell-enclosed microcapsules in vitro. Although our data is preliminary, we believe that agarose/PSSa microcapsules are promising for producing semipermeable membranes that enable allo-and xenotransplantation of neurosecretory cells into the brain in the absence of systems immunosuppression. This approach is expected to be applied in Parkinson's disease in the near future.
| Original language | English |
|---|---|
| Pages (from-to) | 35-39 |
| Number of pages | 5 |
| Journal | Neurological Surgery |
| Volume | 24 |
| Issue number | 1 |
| Publication status | Published - 1996 |
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Keywords
- agarose/poly (styrene sulfonic acid) mixed gel
- allograft
- encapsulation
- neural transplantation
- Parkinson's disease
- PC12 cell
- xenograft
ASJC Scopus subject areas
- Clinical Neurology
Cite this
Encapsulated dopamine-secreting cells transplanted into the brain : A possible therapy for Parkinson's disease. / Miyoshi, Yasuyuki; Date, Isao; Ono, Takeshi; Imaoka, Takashi; Asari, Shoji; Ohmoto, Takashi; Iwata, Hiroo.
In: Neurological Surgery, Vol. 24, No. 1, 1996, p. 35-39.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Encapsulated dopamine-secreting cells transplanted into the brain
T2 - A possible therapy for Parkinson's disease
AU - Miyoshi, Yasuyuki
AU - Date, Isao
AU - Ono, Takeshi
AU - Imaoka, Takashi
AU - Asari, Shoji
AU - Ohmoto, Takashi
AU - Iwata, Hiroo
PY - 1996
Y1 - 1996
N2 - Encapsulation of neurosecretory cells within a semipermeable membrane may possibly isolate the enclosed cells from the host immune system and allow inward diffusion of nutrients and outward diffusion of neurotransmitters. Moreover, the encapsulation procedure may prevent the tumor formation of enclosed cells, when they are derived from tumor cells. In the present study, PC12 cells, a dopaminergic cell line derived from a rat pheochromocytoma, were enclosed within in agarose/poly (styrene sulfonic acid) (agarose/PSSa) mixture and transplanted into the brains of rats (allogeneic transplantation) or guinea pigs (xenogeneic transplantation). Tyrosine hydroxylase (TH) immunoreactive PC12 cells within the microcapsules were observed in all rats and guinea pigs at least up to five weeks after transplantation. PC12 cells were round in shape and of relatively uniform small size. Although PC12 cells occasionally formed cell clusters, the formation of a tumor was not observed. The host reaction to agarose/PSSa microcapsules was minimum. The degree of glial fibrillary acidic protein (GFAP) positive astrocyte density around the microcapsules was similar to that around injection marks. There was no apparent immunological rejection around the capsules. High-performance liquid chromatography with electrochemical detection (HPLC-EC) showed basal and potassium-evoked release of dopamine from the PC12 cell-enclosed microcapsules in vitro. Although our data is preliminary, we believe that agarose/PSSa microcapsules are promising for producing semipermeable membranes that enable allo-and xenotransplantation of neurosecretory cells into the brain in the absence of systems immunosuppression. This approach is expected to be applied in Parkinson's disease in the near future.
AB - Encapsulation of neurosecretory cells within a semipermeable membrane may possibly isolate the enclosed cells from the host immune system and allow inward diffusion of nutrients and outward diffusion of neurotransmitters. Moreover, the encapsulation procedure may prevent the tumor formation of enclosed cells, when they are derived from tumor cells. In the present study, PC12 cells, a dopaminergic cell line derived from a rat pheochromocytoma, were enclosed within in agarose/poly (styrene sulfonic acid) (agarose/PSSa) mixture and transplanted into the brains of rats (allogeneic transplantation) or guinea pigs (xenogeneic transplantation). Tyrosine hydroxylase (TH) immunoreactive PC12 cells within the microcapsules were observed in all rats and guinea pigs at least up to five weeks after transplantation. PC12 cells were round in shape and of relatively uniform small size. Although PC12 cells occasionally formed cell clusters, the formation of a tumor was not observed. The host reaction to agarose/PSSa microcapsules was minimum. The degree of glial fibrillary acidic protein (GFAP) positive astrocyte density around the microcapsules was similar to that around injection marks. There was no apparent immunological rejection around the capsules. High-performance liquid chromatography with electrochemical detection (HPLC-EC) showed basal and potassium-evoked release of dopamine from the PC12 cell-enclosed microcapsules in vitro. Although our data is preliminary, we believe that agarose/PSSa microcapsules are promising for producing semipermeable membranes that enable allo-and xenotransplantation of neurosecretory cells into the brain in the absence of systems immunosuppression. This approach is expected to be applied in Parkinson's disease in the near future.
KW - agarose/poly (styrene sulfonic acid) mixed gel
KW - allograft
KW - encapsulation
KW - neural transplantation
KW - Parkinson's disease
KW - PC12 cell
KW - xenograft
UR - http://www.scopus.com/inward/record.url?scp=0030064546&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030064546&partnerID=8YFLogxK
M3 - Article
C2 - 8559262
AN - SCOPUS:0030064546
VL - 24
SP - 35
EP - 39
JO - Neurological Surgery
JF - Neurological Surgery
SN - 0301-2603
IS - 1
ER -