Abstract：
:Nematocysts are characteristic organelles of the phylum Cnidaria. The free-living Platyhelminth Microstomum lineare preys on Hydra oligactis and sequesters nematocysts. All nematocyst types become phagocytosed without adherent cytoplasm by intestinal cnidophagocytes. Desmoneme and isorhiza nematocysts disappear within 2 days after ingestion whereas cnidophagocytes containing the venom-loaded stenotele nematocysts migrate out of the intestinal epithelia through the parenchyma to the epidermis. Epidermally localized stenoteles are still able to discharge suggesting that this hydra organelle does preserve its physiological properties. Three to four weeks after ingestion, the majority of stenoteles disappear from M. lineare. To search for alterations of nematocysts that might precede their disappearance, flatworms were stained with acridine orange, a dye that binds to poly-γ-glutamic acid present in hydra nematocysts. The staining properties of all three nematocyst types were indistinguishable during the first 60 min after ingestion of hydra tissue whereas 15 h later, the majority of desmoneme and isorhiza had lost their stainability in striking contrast to stenoteles. In M. lineare inspected 2, 4 and 10 days after feeding, 20-40% of stenoteles had lost their stainability with acridine orange. Non-stained stenoteles had sizes similar to their stained counterparts but some of them were slightly deformed. The presented data indicate that acridine orange staining allows the detection of early alterations of all three ingested nematocyst types preceding their disappearance from M. lineare. Furthermore, they support the notion that the transport of venom-loaded stenoteles to the epidermis provides a strategy of excretion.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Krohne Gdoi
10.1007/s00441-019-03149-wsubject
Has Abstractpub_date
2020-01-01 00:00:00pages
63-71issue
1eissn
0302-766Xissn
1432-0878pii
10.1007/s00441-019-03149-wjournal_volume
379pub_type
杂志文章abstract：:The ontogeny of gut innervation in the anuran amphibian Xenopus laevis was studied using immunohistochemistry on sections of whole larvae from NF stages 38-52. Immunoreactivity to acetylated tubulin confirmed the presence of nerve fibres as early as stages 38-39. Actin immunoreactivity was found at stage 41, indicatin...
journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：2001-10-01 00:00:00
abstract：:Fixed cerebral vesicles of mouse foetuses were fractured and examined with the scanning electron microscope. This method provides a study of the three dimensional developmental features of the pseudostratified columnar epithelium up to the formation of the early cortex plate. Matrix cells are a cell population of homo...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00219466
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journal_title：Cell and tissue research
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更新日期：1975-07-23 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章,评审
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pub_type： 杂志文章,评审
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journal_title：Cell and tissue research
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journal_title：Cell and tissue research
pub_type： 杂志文章
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journal_title：Cell and tissue research
pub_type： 杂志文章
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journal_title：Cell and tissue research
pub_type： 杂志文章
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1997-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00213820
更新日期：1988-04-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004419900114
更新日期：2000-02-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00215430
更新日期：1987-07-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-018-2878-y
更新日期：2018-11-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00297502
更新日期：1990-04-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00300227
更新日期：1994-09-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050960
更新日期：1997-12-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00233613
更新日期：1980-01-01 00:00:00
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journal_title：Cell and tissue research
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doi：10.1007/s00441-020-03319-1
更新日期：2021-01-06 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章,评审
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更新日期：2019-08-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00212550
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00220126
更新日期：1976-02-25 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：2018-12-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1978-12-29 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-013-1788-2
更新日期：2014-04-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-019-03008-8
更新日期：2019-08-01 00:00:00
abstract：:Haemophilic arthropathy is the major cause of disability in patients with haemophilia and, despite prophylaxis with coagulation factor concentrates, some patients still develop articular complications. We evaluate the feasibility of a tissue engineering approach to improve current clinical strategies for cartilage reg...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-016-2408-8
更新日期：2016-10-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00305791
更新日期：1994-10-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF01258491
更新日期：1982-01-01 00:00:00
abstract：:Vitrification of biological specimens in liquid nitrogen can be achieved under high pressure (2,100 bars). This procedure obviates the use of aldehyde fixation and cryoprotection (glycerol). The present work demonstrates its applicability to the freeze-etching of mammalian brain tissue. Freeze-fracture repicas from ra...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00237626
更新日期：1980-01-01 00:00:00
