Abstract：
:Ultrastructural studies of pancreatic islets have suggested that crinophagy provides a possible mechanism for intracellular degradation of insulin in the insulin-producing B-cells. In the present study, a quantitative estimation of crinophagy in mouse pancreatic islets was attempted by morphometric analysis of lysosomes containing immunoreactive insulin. Isolated islets were incubated in tissue culture for one week in 3.3, 5.5 or 28 mmol/l glucose. The lysosomes of the pancreatic B-cells were identified by morphological and enzyme-cytochemical criteria and divided into three subpopulations comprising primary lysosomes and insulin-positive or insulin-negative secondary lysosomes. Both the volume and numerical density of the primary lysosomes increased with increasing glucose concentration. The proportion of insulin-containing secondary lysosomes was highest at 5.5 and lowest at 3.3 mmol/l glucose. Insulin-negative secondary lysosomes predominated at 3.3 mmol/l glucose. Studies of the dose-response relationships of glucose-stimulated insulin biosynthesis and insulin secretion of the pancreatic islets showed that biosynthesis had an apparent Km-value for glucose of 7.0 mmol/l, whereas it was 14.5 mmol/l for secretion. The pronounced crinophagic activity at 5.5 mmol/l glucose may thus be explained by the difference in glucose sensitivity between insulin biosynthesis and secretion resulting in an intracellular accumulation of insulin-containing secretory granules. The predominance of insulin-negative secondary lysosomes at 3.3 mmol/l glucose may reflect an increased autophagy, whereas the predominance of primary lysosomes at 28 mmol/l glucose may reflect a generally low activity of intracellular degradative processes.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Schnell AH,Swenne I,Borg LAdoi
10.1007/BF00213820subject
Has Abstractpub_date
1988-04-01 00:00:00pages
9-15issue
1eissn
0302-766Xissn
1432-0878journal_volume
252pub_type
杂志文章abstract：:The startle is a relatively simple ubiquitous reflex. Interestingly, it has a "non-zero baseline", i.e., its magnitude can be reduced or enhanced. We reflect here on the translational value of prepulse inhibition and fear-related potentiation as endophenotypes that can be used for the investigation of complex psychiat...
journal_title：Cell and tissue research
pub_type： 杂志文章,评审
doi：10.1007/s00441-013-1599-5
更新日期：2013-10-01 00:00:00
abstract：:A continuous cell line was previously obtained by Simian Virus (SV) 40 transformation of primary cultures of dissociated mouse fetal hypothalami. One clone from this cell line has been previously shown to possess some of the ultrastructural features, immunological properties and synthesizing capacities of magnocellula...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00219699
更新日期：1976-08-16 00:00:00
abstract：:Neural lobes of control and "Jimpy" mice were examined electron microscopically. The ultrastructure and incidence of pituicytes was examined following reports of reductions in astrocyte and oligodendrocyte populations in areas of the CNS of Jimpy mice. The failure to demonstrate any modification of structure or number...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00220162
更新日期：1976-03-05 00:00:00
abstract：:We have examined radioautographically the protein synthetic and secretory activity of differentiating odontoblasts and ameloblasts, exposed for 9 h in vitro to various concentrations of colchicine in the presence of 3H-proline. Colchicine impairs the cytodifferentiation of the dental epithelium into ameloblasts and of...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00216651
更新日期：1988-06-01 00:00:00
abstract：:The extracellular matrix is involved in various morphogenetic processes which are accompanied by changes in its physicochemical properties and spatial organization. In the adult brain it contributes to cellular communication and the regulation of neuronal activity. The present study deals with the postnatal appearance...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050790
更新日期：1997-04-01 00:00:00
abstract：:The ultrastructure of adult male rat pinealocytes was studied after orchidectomy and orchidectomy followed by LH-RH administration. Castration causes an increased development of the rough endoplasmic reticulum and the Golgi apparatus as well as an increase in the number of lipid droplets and lysosomes. The changes aft...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00219145
更新日期：1976-04-02 00:00:00
abstract：:The ultrastructural localization of dipeptidyl peptidase IV (DPP IV) (EC 3.4.14.5) in rat submandibular and parotid glands was studied immunocytochemically by the peroxidase-antiperoxidase (PAP) method, using a monospecific antiserum against rat kidney DPP IV. There were no differences in the immunocytochemical locali...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00217869
更新日期：1984-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00219899
更新日期：1977-11-07 00:00:00
abstract：:The distribution of serotonin-immunoreactive cells in the lung of 4 species of reptiles was investigated. Serotonin-containing cells were found forming groups in the interconnecting septa in all 4 species studied, and also as solitary cells in Testudo graeca and Mauremys caspica. Serotonin-containing cells were also l...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00216504
更新日期：1987-06-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00218949
更新日期：1987-12-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00209040
更新日期：1978-10-17 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00226973
更新日期：1984-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050541
更新日期：1996-02-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00327750
更新日期：1990-10-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00210521
更新日期：1981-01-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00441-005-1134-4
更新日期：2005-09-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-008-0701-x
更新日期：2008-12-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-012-1510-9
更新日期：2013-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-007-0550-z
更新日期：2008-04-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410000262
更新日期：2001-05-01 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：2013-06-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00217320
更新日期：1987-09-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00319382
更新日期：1992-03-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00217417
更新日期：1983-01-01 00:00:00
abstract：:Previous light-microscopic and ultra-immunohistochemical tracer studies revealed the existence of an independent local immune response of the simian oral mucosa. This local response is attributed to the presence of minor salivary gland (MSG) duct-related lymphoid tissue. Semithin sections from a total of 263 Epon-embe...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00217578
更新日期：1985-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00318501
更新日期：1995-02-01 00:00:00
abstract：:The peritoneal mesothelium of mouse embryos (12 to 18 day of gestation) was studied by freeze-fracture and in sections in order to reveal the initial formation of the tight junctions. Freeze-fracture observations showed three types of tight junctions. Type I consists of belt-like meshworks of elevations on the P face ...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00232008
更新日期：1979-05-18 00:00:00
abstract：:We investigated the binding characteristics of two monoclonal antibodies, 4F3 and 3F8, which in the retina specifically stain Müller cells, both with protein blots and immunohistochemically in sections of various regions of the central nervous system of neonatal and adult cats and rats. Clear differences emerged betwe...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050887
更新日期：1997-09-01 00:00:00
abstract：:The interendothelial junctions of all segments of the renal vasculature have been studied in eight species using the freeze-fracture technique. Three types of junctions have been found. Combinations of tight and gap junction elements are characteristic for interlobular arteries and proximal afferent arterioles. Contin...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00217224
更新日期：1984-01-01 00:00:00
abstract：:The acrosome is a special organelle that develops from the Golgi apparatus and the endolysosomal compartment in the spermatids. Centromere protein E (CENP-E) is an essential kinesin motor in chromosome congression and alignment. This study is aimed at investigating the roles and mechanisms of kinesin-7 CENP-E in the f...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-020-03341-3
更新日期：2020-11-25 00:00:00
