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Subunit composition of the untransformed glucocorticoid receptor in the cytosol and in the cell.

We have used bifunctional reagents to examine the subunit composition of the non-DNA-binding form of the rat and human glucocorticoid recept … s contained 2.2 mol hsp90/mol steroid-binding subunit. Cross-linking of the receptor complex in the cytosol completely prevented salt-induced dissociation of the subunits. The cross-linked receptor was electrophoretically resolved into two oligomeric complexes of apparent molecular mass 288 kDa and 347 kDa, reflecting the association of the 53-kDa protein …

Binding of methyltrienolone (R1881) to a progesterone receptor-like component of human prostatic cytosol.

The synthetic steroid methyltrienolone (R1881, 17beta-hydroxy-17alpha-methyl-estra-4,9,11-trien-3-one) binds with high affinity to protein in cytosols prepared from human hyperplastic prostate. R1881 also binds to the androgen receptor of rat prostate and the progesterone receptor of rabbit uterus. Other steroids compete with R1881 for unoccupied binding sites in the human prostatic cytosols in a manner similar to that observed with the rabbit uterine progesterone receptor, rather than the rat prostatic androgen receptor. The progesterone receptor-like binding sites are a feature of the prosta…

Cytosol-Targeting Delivery of Non-Nucleotide STING Agonist Achieves Inhalable Nanoparticle-Based Anthrax Vaccine.

Inhalational anthrax is a deadly disease caused by inhalation of Bacillus anthracis spores. Current anthrax vaccines for human use have limi … releasing rPA for antigen presentation. Proton sponge effect allows nanoparticle to escape into the cytosol, and then disulfide bond cleavage triggered by cytosolic glutathione causes dissociation of nanoparticle and release of MSA-2 within the cytosol, significantly enhancing bioavailability of MSA-2 as an adjuvant. This spatiotemporal delivery mechanism …

Спроектировать датчик роста для отбора внутриклеточных антител в цитозе млекопитающих клеток.

Предполагается, что внутриклеточные антитела (внутренние) будут функционировать в качестве терапевтических средств, а также инструментов для разглашения в vivo функции белков. В этом исследовании мы предлагаем новый метод отбора внутри кузова в цитозе млекопитающих клеток путем использования сигнала роста, обусловленного взаимодействием целевого антигена и датчика роста SFv-c-kit. Здесь мы опротестуем этот метод, чтобы впервые выбрать конкретные внутритела для борьбы с вирусом бешеного нуклеотеина (RV-N). В результате мы успешно отбираем антигенные внутрикомбинаты из наивной синтетической библ

Совпадение в аннотации оригинала
Intracellular antibodies (intrabodies) are expected to function as therapeutics as well as tools for elucidating in vivo function of proteins. In this study, we propose a novel intrabody selection method in the cytosol of mammalian cells by utilizing a growth signal, induced by the interaction of the target antigen and an scFv-c-kit growth sensor. Here, we c…

Caspase-11 activation in response to bacterial secretion systems that access the host cytosol.

Inflammasome activation is important for antimicrobial defense because it induces cell death and regulates the secretion of IL-1 family cyto … any bacterial pathogens use specialized secretion systems to translocate effector proteins into the cytosol of host cells. These secretion systems can also deliver flagellin into the cytosol, which triggers caspase-1 activation and pyroptosis. However, even in the absence of flagellin, these secretion systems induce inflammasome activation and the release …

Investigating endocytic pathways to the endoplasmic reticulum and to the cytosol using SNAP-trap.

Cholera toxin enters cells via an unusual pathway that involves trafficking through endosomes to the endoplasmic reticulum (ER). Whether the … of ER-targeted SNAP-tag we used adenovirus-5, which traffics to endosomes and then escapes into the cytosol. The virus did not react with ER-targeted SNAP but with cytosolic SNAP. Together, our results establish a new method (SNAP-trap) to study trafficking of different cargo to the ER and the cytosol and provide evidence for the existence of a constituti …

Mitochondrial iron trafficking and the integration of iron metabolism between the mitochondrion and cytosol.

The mitochondrion is well known for its key role in energy transduction. However, it is less well appreciated that it is also a focal point … ulation of iron uptake by the mitochondrion and how this is coordinated with iron metabolism in the cytosol and other organelles (e.g., lysosomes). In this article, we discuss the burgeoning field of mitochondrial iron metabolism and trafficking that has recently been stimulated by the discovery of proteins involved in mitochondrial iron storage (mitochon …

Cholera toxin: an intracellular journey into the cytosol by way of the endoplasmic reticulum.

Cholera toxin (CT), an AB(5)-subunit toxin, enters host cells by binding the ganglioside GM1 at the plasma membrane (PM) and travels retrograde through the trans-Golgi Network into the endoplasmic reticulum (ER). In the ER, a portion of CT, the enzymatic A1-chain, is unfolded by protein disulfide isomerase and retro-translocated to the cytosol by hijacking components of the ER associated degradation pathway for misfolded proteins. After crossing the ER membrane, the A1-chain refolds in the cytosol and escapes rapid degradation by the proteasome to induce disease by ADP-ribosylating the large G…

Identification of theta-class glutathione S-transferase in liver cytosol of the marmoset monkey.

The presence of theta-class glutathione S-transferase (GST) in marmoset monkey liver cytosol was investigated. An anti-peptide antibody targeted against the C-terminus of rGSTT1 reacted with a single band in marmoset liver cytosol that corresponded to a molecular weight of 28 kDa. The intensity of the immunoreactive band was not affected by treatment of marmoset monkeys with 2,3,7,8-tetrachlorodibenzo-p-dioxin, phenobarbitone, rifampicin or clofibric acid. Similarly, activity towards methyl chloride (MC) was unaffected by these treatments. However, GST activity towards 1,2-epoxy-3-(p-nitrophen…

Tissue polypeptide antigen in tumor cytosol: a new prognostic indicator in primary breast cancer.

The assessment of the risk of relapse is a critical need in the management strategy of breast cancer patients. To date, the most reliable prognostic factor is axillary nodal status. Several other pathological and biological parameters are currently under evaluation. Since 1982 we have been studying the prognostic role of several tumor markers in breast cancer cytosol. Elevated cytosol concentrations of tissue polypeptide antigen (TPA) have been found to have a highly significant direct correlation with both prolonged relapse-free interval (RFI) and higher survival rate. The information provide…

Differences in the developmental patterns of somatotrophic and lactogenic receptors in rabbit liver cytosol.

These studies have examined the ontogeny of specific GH- and PRL-binding proteins in rabbit liver cytosol across the fetal, early neonatal, and adult periods. The precise hormonal specificity of binding of the somatotropic/lactogenic ligand, [125I]human GH, was determined by displacement with monoclonal antibodies against either rabbit mammary gland PRL receptors or liver GH receptors. The developmental changes were evaluated by gel filtration chromatography, which allowed a measure of both the extent of binding and the molecular size (Mr). Scatchard analysis indicated that fetal liver cytosol…

Immunohistologic detection of estrogen receptors in paraffin-embedded breast cancers: correlation with cytosol measurements.

Paraffin-embedded sections of 76 human breast tissue specimens were analyzed for estrogen receptors (ER) and endogenous bound estrogen (ER-E … rrelation was found between the presence of ER by the PAP method and by the biochemical analysis of cytosol preparations. The PAP method, requiring no special preparation of surgical specimens, overcomes many of the disadvantages of the cytosol method and adds the advantage of independent evaluation of nuclear and cytoplasmic estrogen binding sites.

[Various hormonal and metabolic disorders in liver cytosol during compensated and decompensated experimental stress].

Alterations of glucocorticoid-receptor interactions in liver cytosol and their importance in cell metabolic impairments were studied under various conditions of experimental stress. The experimental stress caused by acute peritonitis developed in rat males of Wistar strain. The alterations in steroid-receptor interactions, observed in liver cells under the stress conditions, might be responsible for adaptation of the cells and affect distinctly the metabolic reactions, inhibiting the early exhaustion of energy substrates in a cell (the stress compensated form). In severe stress reaction an exc…

Concentration of endogenous oestradiol as related to oestradiol receptor sites in breast tumor cytosol.

Biopsies or mastectomy specimens from 69 malignant and 17 non-malignant human breast tumours have been examined with respect to cytoplasmic oestradiol receptors and endogenous oestradiol concentration. Of the malignant tumours, 45 (65%) had significant oestradiol receptor concentrations (136.7 fmol/mg protein +/- 38.3 S.E.M.). Oestradiol values in the cytosol were not correlated to receptor levels. Cytosol oestradiol concentrations in the receptor-negative tumours were normally distributed about a mean value of 7.4 fmol/mg protein +/- 0.9 (S.E.M.). Oestradiol levels were similar to the median …

Regulation of the androgen and glucocorticoid receptors in rat and mouse skeletal muscle cytosol.

Using a charcoal technique, we determined the relative binding affinity of some anabolic compounds for the androgen and glucocorticoid receptors in cytosol from rat skeletal muscle. Only a few of the compounds analyzed competed for the receptor-binding sites. The androgen and glucocorticoid receptors were analyzed in rat and mouse skeletal muscle cytosols by Scatchard analysis. In rats grouped according to sex and age, the cytosolic protein content was about the same in all groups, but the DNA content decreased with increased weight of the animal regardless of sex (male, female, or castrated m…

Studies on the conversion of the cytosol delta-aminolevulinate synthetase to the mitochondrial enzyme.

DELTA-Aminolevulinate (ALA) synthetase was induced in the rat by allylisopropylacetamide, and ALA synthetase in the liver cytosol fraction was partially purified. The cytosol ALA synthetase shows a molecular weight (M.W.) of about 600,000 by gel filtration and about 178,000 by sucrose density gradient centrifugation, whereas the mitochondrial enzyme gives M.W. about 110,000 by either method. In the presence of 0.25 M NaCl, however, the cytosol ALA synthetase showed M.W. 300,000--350,000 by gel filtration and gave M.W. 110,000 or a S value of 6.4 by centrifugation. Treatment of the cytosol ALA …

Advancements in forecasting liver cytosol metabolic stability: a comprehensive update on machine learning predictive models.

MOTIVATION: Drug metabolism plays a key role in determining a compound's pharmacokinetics and overall success in development. While cytochrome P450 enzymes have been widely studied, non-cytochrome P450 enzymes, such as aldehyde oxidase, xanthine oxidase, and carboxylesterases, are increasingly recognized as important contributors to drug clearance. Since standard liver microsomal screening fails to include these enzymes, stability assessment using liver cytosols is essential to prevent late-stage development failures. RESULTS: We expanded our dataset to over 7000 cytosol metabolic stability m…

RNF5 promotes acute lung injury through HSPA5 ER-to-cytosol translocation and resultant PERK activation.

Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are severe conditions lacking specific pharmacological treatments. En … PERK release. Furthermore, RNF5 promotes the retro-translocation of HSPA5 from the ER lumen to the cytosol. In the cytosol, RNF5 mediates the K6- and K63-linked polyubiquitination of HSPA5, enhancing its thermal stability and preventing its re-entry into the ER. This spatial sequestration sustains the persistent dissociation of the PERK-HSPA5 complex, le …