Abstract:
:1. The visual transduction system of the vertebrate retina is a well-studied model for biochemical and molecular studies of signal transduction. The structure and function of rhodopsin, a prototypical G protein-coupled receptor, and transducin or Gt, the photoreceptor G protein, have been particularly well studied. Mechanisms of rhodopsin-Gt interaction are discussed in this review. 2. The visual pigment rhodopsin contains a chromophore, and thus conformational changes leading to activation can be monitored spectroscopically. A model of the conformational changes in the activated receptor is presented based on biophysical and biochemical data. 3. The current information on sites of interaction on receptors and cognate G proteins is summarized. Studies using synthetic peptides from amino acid sequences corresponding to Gt and rhodopsin have provided information on the sites of rhodopsin-Gt interaction. Synthetic peptides from the carboxyl terminal region of alpha t mimic Gt by stabilizing the active conformation of rhodopsin, Metarhodopsin II. 4. The conformation of one such peptide when it is bound to Metarhodopsin II was determined by 2D NMR. The model based on the NMR data was tested using peptide analogs predicted to stabilize or break the structure. These studies yield molecular insight into why toxin-treated and mutant G proteins are uncoupled from receptors.
journal_name
Cell Mol Neurobioljournal_title
Cellular and molecular neurobiologyauthors
Hamm HEdoi
10.1007/BF00741446subject
Has Abstractpub_date
1991-12-01 00:00:00pages
563-78issue
6eissn
0272-4340issn
1573-6830journal_volume
11pub_type
杂志文章,评审abstract::Established cancer cell lines are routinely used to study cancer. Several factors such as serial passage may affect the reproducibility of experiments with cancer cell lines, but few researches focused on these changes. In the present study, different morphology and decreased tumorigenicity were observed in late passa...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-018-0592-7
更新日期:2018-08-01 00:00:00
abstract::1. The term "blood-brain barrier" describes a range of mechanisms that control the exchange of molecules between the internal environment of the brain and the rest of the body. 2. The underlying morphological feature of these barriers is the presence of tight junctions which are present between cerebral endothelial ce...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1023/a:1006991809927
更新日期:2000-02-01 00:00:00
abstract::1. Human medulloblastoma (ONS-76), a central nervous system (CNS)-derived undifferentiated cell line, was found to possess glial characteristics as defined by responses in the interferon (IFN) system; ONS-76 cells produced as much IFN-beta as human fibroblast and glioma cells by viral infection and poly(I):poly(C) ind...
journal_title:Cellular and molecular neurobiology
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doi:10.1023/a:1026327309345
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF00713029
更新日期:1989-06-01 00:00:00
abstract::Although Butylphthalide (BP) has protective effects that reduce ischemia-induced brain damage and neuronal cell death, little is known about the precise mechanisms occurring during cerebral ischemia/reperfusion (I/R). Therefore, the aim of this study was to investigate the neuroprotective mechanisms of BP against isch...
journal_title:Cellular and molecular neurobiology
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doi:10.1007/s10571-015-0302-7
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abstract:AIMS:Treatments that increase acetylcholine release from brain slices decrease the synthesis of phosphatidylcholine by, and its levels in, the slices. We examined whether adding cytidine or uridine to the slice medium, which increases the utilization of choline to form phospholipids, also decreases acetylcholine levels...
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journal_title:Cellular and molecular neurobiology
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journal_title:Cellular and molecular neurobiology
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更新日期:2010-10-01 00:00:00
abstract::Elevated iron levels in the substantia nigra (SN) participate in neuronal death in Parkinson's disease (PD), while the mechanisms underlying the increased iron are still unknown. Ceruloplasmin (CP), a ferroxidase, converts highly toxic ferrous iron to its non-toxic ferric form, which cooperated with ferroportin1 (FP1)...
journal_title:Cellular and molecular neurobiology
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abstract::Oligodendrocyte progenitor cell (OPC) migration is critical for effective myelination of the central nervous system. Not only during normal myelination but also during remyelination, the growth factors (GFs) and extracellular matrix (ECM) protein affect the OPC migration. Studies showed the altered levels of GFs and E...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-016-0359-y
更新日期:2017-03-01 00:00:00
abstract::Glioblastoma Multiforme (GBM) is an aggressive form of brain Tumor that has few cures. In this study, we analyze the anti-proliferative effects of a new molecule JQ1 against GBMs induced in Wistar Rats. JQ1 is essentially a Myc inhibitor. c-Myc is also known for altering the biochemistry of a tumor cell. Therefore, th...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-014-0083-4
更新日期:2014-10-01 00:00:00
abstract::One of the few areas of the adult CNS, that are known to be competent for neuronal proliferation, is the subventricular zone (SVZ) lining the brain lateral ventricles. Cells proliferating in the SVZ migrate along a defined pathway, the rostral migratory stream (RMS), where their proliferation continues until reaching ...
journal_title:Cellular and molecular neurobiology
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doi:10.1007/s10571-006-9067-3
更新日期:2006-10-01 00:00:00
abstract::Matrix metalloproteinase-1 (MMP-1), a member of the matrix metalloproteinases family, plays an integral role in extracellular matrix degradation and has been reportedly involved in the regulation of the brain or spinal cord traumatic neurovascular remodeling. Although the critical involvement of MMP-1 in the metastasi...
journal_title:Cellular and molecular neurobiology
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更新日期:2014-11-01 00:00:00
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
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journal_title:Cellular and molecular neurobiology
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doi:10.1007/s10571-011-9674-5
更新日期:2011-08-01 00:00:00
abstract::The hypernociceptive role played by the chemokine CCL2, and its main receptor, CCR2, in pathological settings is being increasingly recognized. We aimed to characterize the involvement of spinal CCL2 in the hyperalgesia due to the intratibial inoculation of fibrosarcoma NCTC 2472 cells in mice. The intrathecal (i.t.) ...
journal_title:Cellular and molecular neurobiology
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更新日期:2014-01-01 00:00:00
abstract::The CD4+CD25+ regulatory T cells (Tregs), an innate immunomodulator, suppress cerebral inflammation and maintain immune homeostasis in multiple central nervous system injury, but its role in intracerebral hemorrhage (ICH) has not been fully characterized. This study investigated the effect of Tregs on brain injury usi...
journal_title:Cellular and molecular neurobiology
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更新日期:2017-07-01 00:00:00
abstract:AIM:In Alzheimer's disease (AD) it is well known that specific regions of the brain are particularly vulnerable to the pathologic insults of the disease. In particular, the hippocampus is affected very early in the disease and by end stage AD is ravaged by neurofibrillary tangles and senile plaques (i.e., the pathologi...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
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更新日期:2003-10-01 00:00:00
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF00711111
更新日期:1986-09-01 00:00:00
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
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更新日期:2011-03-01 00:00:00
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
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更新日期:2015-01-01 00:00:00
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
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更新日期:2013-07-01 00:00:00
abstract::Since gonadal female hormones act on and protect neurons, it is well known that the female brain is less vulnerable to stroke or other brain insults than the male brain. Although glial functions have been shown to affect the vulnerability of the brain, little is known if such a sex difference exists in glia, much less...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-012-9829-z
更新日期:2012-08-01 00:00:00
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journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-012-9892-5
更新日期:2013-03-01 00:00:00
abstract::1. Whole-cell patch clamp experiments were performed on rat dorsal root ganglion (DRG) neurons to investigate the actions of various combinations of Pb2+, Zn2+, and Al3+ on voltage-activated calcium channel currents (VACCCs). 2. Each of these metals has been shown to reduce VACCCs. 3. We investigated the effects of si...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF02088688
更新日期:1994-12-01 00:00:00
abstract::1. Data obtained studying permeability characteristics of single Deiters' membranes in a microchamber system show that intracellular GABA can activate chloride in-->out passage with a GABAA pharmacology. 2. The overall data suggest the presence of a chloride extrusion pump in these neurons based on intracellular GABA ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1023/a:1006944820946
更新日期:1999-12-01 00:00:00
abstract::1. Estrogen exerts profound effects on mood, mental state and memory by acting on both "classical" monoamine and neuropeptide transmitter mechanisms in brain. Here we review an example of each type of action. 2. With respect to the effect of estrogen on central monoamine neurotransmission, low levels of estrogen in wo...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1007/BF02088099
更新日期:1996-06-01 00:00:00
abstract::ATP13A4 is a member of the subfamily of P5-type ATPases. P5-type ATPases are the least studied of the P-type ATPase subfamilies with no ion specificities assigned to them. In order to elucidate ATP13A4 function, we studied the protein's subcellular localization and tested whether it is involved in calcium regulation. ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-009-9445-8
更新日期:2010-03-01 00:00:00