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Wyszukujesz frazę "secretion" wg kryterium: Temat


Tytuł:
Alterations in protein secretion caused by metabolic engineering of glycosylation pathways in fungi
Autorzy:
Kruszewska, Joanna
Perlińska-Lenart, Urszula
Górka-Nieć, Wioletta
Orłowski, Jacek
Zembek, Patrycja
Palamarczyk, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1040697.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycosylation
protein secretion
Trichoderma
Opis:
Due to its natural properties, Trichoderma reesei is commonly used in industry-scale production of secretory proteins. Since almost all secreted proteins are O-glycosylated, modulation of the activity of enzymes of the O-glycosylation pathway are likely to affect protein production and secretion or change the glycosylation pattern of the secreted proteins, altering their stability and biological activity. Understanding how the activation of different components of the O-glycosylation pathway influences the glycosylation pattern of proteins and their production and secretion could help in elucidating the mechanism of the regulation of these processes and should facilitate creation of engineered microorganisms producing high amounts of useful proteins. In this review we focus on data concerning Trichoderma, but also present some background information allowing comparison with other fungal species.
Źródło:
Acta Biochimica Polonica; 2008, 55, 3; 447-456
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of benzoate secreted by Desulfotomaculum acetoxidans DSM 771 in sulfate uptake
Autorzy:
Pawłowska-Ćwięk, Lucyna
Pado, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/1041319.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
sulfonation
benzoate secretion
oxidation
Opis:
This work was designed to find the cause of the delay in hydrogen sulfide dissimilation in Desulfotomaculum acetoxidans DSM 771, which is dependent on the sulfate uptake. This bacterium grown without addition of any aromatic compound was shown by spectrum analysis with the methylene method to contain hydroxy-benzoate derivatives. The presence of these compounds was confirmed by HPLC in fractions obtained from cell walls after 15 days of culture. The test with 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt seemed to indicate the presence of peroxidase, which probably oxidized benzoate to its hydroxy derivatives. The test with 5-sulfo-salicylic acid proved the ability of the investigated strain to utilize arylsulfates and to reduce sulfate group to hydrogen sulfide. On the basis of the above data, we propose the following sequence of reactions: 1, benzoate secretion; 2, benzoate hydroxylation; 3, sulfonation of hydroxy-benzoate derivatives.
Źródło:
Acta Biochimica Polonica; 2005, 52, 4; 797-802
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanisms of catecholamine secretion from chromaffin cells
Autorzy:
Burgoyne, R D
Powiązania:
https://bibliotekanauki.pl/articles/69252.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
acetylcholine
calcium
neurosecretion
neuroendocrine secretion
catecholamine
adrenaline
noradrenaline
chromaffin cell
exocytosis
secretion
Źródło:
Journal of Physiology and Pharmacology; 1995, 46, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of indomethacin on the ACTH secretion induced by central stimulation of adrenergic receptors
Autorzy:
Glod, R.
Gadek-Michalska, A.
Bugajski, J.
Powiązania:
https://bibliotekanauki.pl/articles/70828.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
corticosterone secretion
prostaglandin
adrenergic receptor
indomethacin
rat
secretion
hypothalamic-pituitary-adrenal axis
Źródło:
Journal of Physiology and Pharmacology; 2000, 51, 2
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of individual azurocidin N-glycosylation sites in regard to its secretion by insect cells, susceptibility to proteolysis and antibacterial activity
Autorzy:
Indyk, Katarzyna
Olczak, Teresa
Ciuraszkiewicz, Justyna
Wątorek, Wiesław
Olczak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1041040.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycosylation
protein secretion
azurocidin
antimicrobial activity
Opis:
Azurocidin is an inactive serine protease homolog with primary sequence similarity to neutrophil elastase, cathepsin G, and proteinase 3. The aim of this study was to investigate possible consequences of differential glycosylation of azurocidin in regard to its secretion, protein stability as measured by susceptibility to proteolysis, and antibacterial activity. Site-directed mutagenesis was employed to generate mutant azurocidin variants lacking individual N-glycosylation sites. Our results show that N-linked glycans may play a role in proper azurocidin folding and subsequent secretion by insect cells. We also demonstrate that N-linked glycosylation contributes to azurocidin stability by protecting it from proteolysis. The lack of N-glycosylation at individual sites does not significantly influence the azurocidin antibacterial activity.
Źródło:
Acta Biochimica Polonica; 2007, 54, 3; 567-573
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of the low-frequency magnetic fields of different parameters on the secretion of cortisol in men
Autorzy:
Woldańska-Okońska, Marta
Czernicki, Jan
Karasek, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2179794.pdf
Data publikacji:
2013-03-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
magnetic fields
cortisol secretion
stressogenic effect
Opis:
Objectives: The aim of this paper is to test the infl uence of long-term application of the low-frequency magnetic fi elds in magnetotherapy and magnetostimulation on cortisol secretion in men. Materials and Methods: Patients were divided into three groups: 16 men underwent magnetotherapy and 20 men (divided into two groups) underwent magnetostimulation. Magnetotherapy – 2 mT induction, 40 Hz, bipolar square wave, was applied for 20 min to lumbar area. Magnetostimulation (Viofor Jaroszyk, Paluszak, Sieroń (JPS) system, M2P2 program) was applied to 10 patients for 12 min each day. The third group (10 patients) underwent magnetostimulation (Viofor JPS system, M3P3) for 12 min each day using a different machine. All groups had 15 rounds of applications at approximately 10:00 a.m. with intermissions on the weekends. Blood serum was taken four times in a 24-hour period, before applications, the day after applications and a month later. Chemiluminescence micromethod was used to indicate hormone concentrations. Data was statistically analyzed with the analysis of variance (ANOVA) method. Results: The statistically signifi cant gains in the circadian cortisol profi le at 4:00 p.m., before and after application, were observed as a decrease in concentration during magnetotherapy. In magnetostimulation, with the M2P2 program, a signifi cant increase in the cortisol concentration was observed in circadian profi le at 12:00 p.m. one month after the last application. After magnetostimulation with the M3P3 program, a signifi cant increase in concentration at 6:00 a.m. and a decrease in concentration at 12:00 p.m. were observed one month later. Statistically signifi cant difference was demonstrated in the participants after the application of magnetotherapy and magnetostimulation with M3P3 program compared to the men submitted to magnetostimulation, with M2P2 program, at 4:00 p.m. after 15 applications. Conclusions: Biological hysteresis one month after magnetostimulation suggests long-term infl uence on the hypothalamohypophysial axis. The circadian curves of cortisol secretion a day after magnetotherapy and magnetostimulation with M3P3 program compared to magnetostimulation with M2P2 progam differs nearly by 100%, which proves that they show varied infl uence on cortisol secretion in men. All changes in the hormone concentration did not exceed the physiological standards of cortisol secretion, which suggests a regulating infl uence of magnetic fi elds on cortisol concentration rather than a strong stressogenic impact of magnetostimulation.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 92-101
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Initial characteristics of excretion - secretion products from III stage of Anisakis simplex larvae
Autorzy:
Dziekonska-Rynko, J.
Rokicki, J.
Jablonowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/838239.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
larva
Anisakis simplex
excretion-secretion product
host
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peroxynitrite can affect platelet responses by inhibiting energy production
Autorzy:
Rusak, Tomasz
Tomasiak, Marian
Ciborowski, Michal
Powiązania:
https://bibliotekanauki.pl/articles/1041172.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
aggregation
porcine platelets
peroxynitrite
mitochondria
glycolysis
secretion
Opis:
Peroxynitrite (ONOO-) strongly inhibits agonist-induced platelet responses. However, the mechanisms involved are not completely defined. Using porcine platelets, we tested the hypothesis that ONOO- reduces platelet aggregation and dense granule secretion by inhibiting energy production. It was found that ONOO- (25-300 µM) inhibited collagen-induced dense granule secretion (IC50 = 55 ± 7 µM) more strongly than aggregation (IC50 = 124 ± 16 µM). The antiaggregatory and antisecretory effects of ONOO- were only slightly (5-10%) reduced by 1H-[1,2,4]-oxadiazolo-[4,3-α]quinoxalin-1-one (ODQ), an inhibitor of soluble guanylate cyclase. In resting platelets ONOO- (50-300 µM) enhanced glycolysis rate and reduced oxygen consumption, in a dose dependent manner. The ONOO- effects on glycolysis rate and oxygen consumption were not abolished by ODQ. The extent of glycolysis stimulation exerted by ONOO- was similar to that produced by respiratory chain inhibitors (cyanide and antimycin A) or an uncoupler (2,4-dinitrophenol). Stimulation of platelets by collagen was associated with a rise in mitochondrial oxygen consumption, accelerated lactate production, and unchanged intracellular ATP content. In contrast to resting cells, in collagen-stimulated platelets, ONOO- (200 µM) distinctly decreased the cellular ATP content. The glycolytic activity and oxygen consumption of resting platelets were not affected by 8-bromoguanosine 3',5'-cyclic monophosphate. Blocking of the mitochondrial ATP production by antimycin A slightly reduced collagen-induced aggregation and strongly inhibited dense granule secretion. Treatment of platelets with ONOO- (50-300 µM) resulted in decreased activities of NADH : ubiquinone oxidoreductase, succinate dehydrogenase and cytochrome oxidase. It is concluded that the inhibitory effect of ONOO- on platelet secretion and to a lesser extent on aggregation may be mediated, at least in part, by the reduction of mitochondrial energy production.
Źródło:
Acta Biochimica Polonica; 2006, 53, 4; 769-776
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of DDE and dieldrin and their parental substances (DDT and aldrin) on PGE2 and PGF2α release from bovine endometrial explants collected during 120 to 180 days of the gestational period
Autorzy:
Mlynarczuk, J.
Wrobel, M.H.
Dobrzyn, K.
Powiązania:
https://bibliotekanauki.pl/articles/2087240.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pesticides
pregnancy
endometrium
prostaglandin secretion
cattle
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 1; 5-12
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stimulation by nitric oxide of gastric acid secretion in bullfrog fundic mucosa in vitro
Autorzy:
Kawauchi, S.
Sugamoto, S.
Furukawa, O.
Mimaki, H.
Takeuchi, K.
Powiązania:
https://bibliotekanauki.pl/articles/70414.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
histamine
stimulation
prostaglandin
superoxide radical
acid secretion
nitric oxide
bullfrog stomach
gastric acid
in vitro
secretion
bullfrog
Źródło:
Journal of Physiology and Pharmacology; 2001, 52, 1
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three interesting cases of syndrome of inappropriate antidiuretic hormone secretion
Autorzy:
Dyczko, M.
Sawa, M.
Grzywa-Celinska, A.
Szmygin-Milanowska, K.
Kuczynska, M.
Mosiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/3079.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Tematy:
disease syndrome
inappropriate antidiuretic hormone secretion
hyponatremia
diagnostics
Opis:
The syndrome of inappropriate antidiuretic hormone secretion (SIADH) is an etiologically-diverse pathological condition resulting from the elevation in both ectopic and autonomic secretion of the antidiuretic hormone (ADH) by neoplastic tissue; excessive stimulation of the hypothalamic-pituitary axis, e.g. in pulmonary diseases, central nervous system (CNS) abnormalities, endocrine glands dysfunction or due to the use of some medications; intensification of renal ADH action by certain medications and action of substances chemically-related to vasopressin. The clinical characteristics of the syndrome are comprised of the presence of inadequately concentrated urine, hyponatremia, and hypo-osmolal blood serum, as well as weight gain. To show the variety of its causes and courses the article presents three cases of patients diagnosed with SIADH in the Department of Internal Medicine. In each of them the syndrome of inappropriate antidiuretic hormone secretion manifested in clinical laboratory tests in the form of hyponatremia.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2015, 09, 2
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long-standing acromegaly in a patient with a pituitary adenoma not visible on MRI
Autorzy:
Kurowska, Maria
Malicka, Joanna
Tarach, Jerzy S.
Powiązania:
https://bibliotekanauki.pl/articles/1061851.pdf
Data publikacji:
2017
Wydawca:
Medical Education
Tematy:
acromegaly
ectopic GHRH secretion
microadenoma
neuroendocrine tumour
Opis:
Introduction: Acromegaly in the course of a pituitary microadenoma or neuroendocrine GHRH-secreting tumour (GHRH, growth hormone-releasing hormone) invisible on MRI is very rare. Objective: To present the difficulties in determining the cause behind an excessive production of the growth hormone in a patient suffering from long-standing acromegaly, without a pituitary focal lesion that would be visible on MRI. Case report: The authors describe a case of a 69-year-old female with acromegaly, diagnosed 22 years earlier based on the typical somatic symptoms, and confirmed by the elevated concentration of insulin- like growth factor type 1 and lack of growth hormone suppression in the oral glucose tolerance test. The initial MRI scan (1994) had revealed a hypoechogenic 2 x 3 mm lesion in the anterior lobe of the pituitary gland, whose presence was not reported in the subsequent MRI tests. As ectopic GHRH or growth hormone secretion was suspected, a neuroendocrine tumour was searched for. The 47.7 × 54 × 35.7 mm tumour, located in the thoracic outlet, accumulating tektreotide in receptor scintigraphy, turned out to be a nodular goitre on histopathology. Due to the undetermined location of the source of growth hormone overproduction, failure to measure GHRH levels, and the patient’s lack of consent to undergo sella turcica exploration, long-acting release octreotide had been used for many years to manage the patient’s condition. Conclusion: The long-lasting and ineffective search for a neuroendocrine tumour producing GHRH or growth hormone as well as the absence of a focal lesion in the repeated MRI scans render it impossible to unequivocally determine the cause of the patient’s acromegaly, and illustrate the difficulties in discovering the source of growth hormone overproduction.
Źródło:
OncoReview; 2017, 7, 1; 32-37
2450-6125
Pojawia się w:
OncoReview
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eradication of Helicobacter pylori and gastrin-somatostatin link in duodenal ulcer patients
Autorzy:
Konturek, J W
Bielanski, W.
Konturek, S.J.
Domschke, W.
Powiązania:
https://bibliotekanauki.pl/articles/69941.pdf
Data publikacji:
1996
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
radioimmunoassay
infection
plasma somatostatin
duodenal ulcer
gastric acid
cholecystokinin
Helicobacter pylori
chronic infection
acid secretion
gastric secretion
eradication
gastrin
somatostatin
Źródło:
Journal of Physiology and Pharmacology; 1996, 47, 1
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of Na+/H+ exchanger in serotonin secretion from porcine blood platelets
Autorzy:
Tomasiak, Marian
Ciborowski, Michal
Stelmach, Halina
Powiązania:
https://bibliotekanauki.pl/articles/1041323.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
platelet swelling
platelet secretion
serotonin release
Na+/H+ exchanger
platelets
Opis:
This study was undertaken to evaluate whether a link exists between the activation of protein kinase C (PKC), operation of Na+/H+ exchanger (NHE), cell swelling and serotonin (5-HT) secretion in porcine platelets. Activation of platelets by thrombin or phorbol 12-myristate 13-acetate (PMA), a PKC activator, initiated a rapid rise in the activity of Na+/H+ exchanger and secretion of 5-HT. Both thrombin- and PMA-evoked activation of Na+/H+ exchanger was less pronounced in the presence of ethyl-isopropyl-amiloride (EIPA), an NHE inhibitor, and by GF 109203X, a PKC inhibitor. Monensin (simulating the action of NHE) caused a dose-dependent release of 5-HT that was not abolished by GF 109203X or EGTA. Lack of Na+ in the suspending medium reduced thrombin-, PMA-, and monensin-evoked 5-HT secretion. GF 109203X nearly completely inhibited 5-HT release induced by PMA-, partly that induced by thrombin, and had no effect on 5-HT release induced by monensin. EIPA partly inhibited 5-HT release induced by thrombin and nearly totally that evoked by PMA. Electronic cell sizing measurements showed an increase in mean platelet volume upon treatment of cells with monensin, PMA or thrombin. The PMA- and thrombin-evoked rise in mean platelet volume was strongly reduced in the presence of EIPA. As judged by optical swelling assay monensin and PMA produced a rapid rise in platelet volume. The swelling elicited by PMA was inhibited by EIPA and its kinetics was similar to that observed in the presence of monensin. Hypoosmotically evoked platelet swelling did not affect platelet aggregation but significantly potentiated thrombin-evoked release of 5-HT and ATP. Taken together, these results show that in porcine platelets PKC may promote 5-HT secretion through the activation of NHE. It is hypothesized that enhanced Na+/H+ antiport may result in a rise in cell membrane tension (due to cell swelling) which in turn facilitates fusion of secretory granules with the plasma membrane leading to 5-HT secretion.
Źródło:
Acta Biochimica Polonica; 2005, 52, 4; 811-822
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protein production and secretion in an Aspergillus nidulans mutant impaired in glycosylation.
Autorzy:
Perlińska-Lenart, Urszula
Kurzątkowski, Wiesław
Janas, Piotr
Kopińska, Agnieszka
Palamarczyk, Grażyna
Kruszewska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1041477.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycosylation
protein secretion
DPM1 gene
Aspergillus
dolichylphosphate mannose synthase
Opis:
O-glycosylation has been considered a limiting factor in protein secretion in filamentous fungi. Overexpression of the yeast DPM1 gene encoding dolichylphosphate mannose synthase (DPMS) in an Aspergillus nidulans mutant (BWB26A) deficient in O-glycosylation caused an increase in the number of secretory vesicles and changes in protein secretion. However, the secretory proteins, primarily O-mannosylated glucoamylase and N-glycosylated invertase, were mainly trapped in the periplasmic space. Different glycoforms of invertase were found insite the cells, in the periplasmic space and in the cultivation medium. Our data point to the importance of the cell wall as a barrier in protein secretion.
Źródło:
Acta Biochimica Polonica; 2005, 52, 1; 195-205
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

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