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Wyświetlanie 1-8 z 8
Tytuł:
Terapia naltreksonem w niskiej dawce – skuteczność i bezpieczeństwo terapii stosowanej poza wskazaniami
Low Dose Naltrexone - Efficacy and safety of off-label use therapy.
Autorzy:
Stańczak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/762639.pdf
Data publikacji:
2020-01-23
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
stwardnienie rozsiane
choroba Leśniowskiego-Crohna
fibromialgia
naltrekson w niskiej dawce
off-label
multiple sclerosis
fibromyalgia
Crohn’s disease
low-dose naltrexone
Opis:
Naltrexone is well-known opioid antagonist used in chronic or acute states of abuse, respectively. Nowadays the low doses of this drug are gaining popularity among researchers, doctors and patients seeking alternatives to well-known and widely used therapies in various indications. The low-dose naltrexone (LDN) is the therapy which involving the use of naltrexone at daily doses 10 times lower or even lower (usually 1 mg - 5 mg) than in the approved by Food and Drug Administration and European Medicines Agency. The therapy is usually prepared by using pure substance (obtained from manufacturer) or by preparing appropriate dosage from drug available on the market. In accordance with available reports low dosage of naltrexone may acts through short-term and intermittent binding to opioid receptors causes a compensatory increase in endogenous opioids including β-endorphins and increase in expression of μ and δ receptors. The LDN also binds briefly the opioid growth factor receptor (OGFr), causing blockage of binding to opioid growth factor (OGF, met-enkephalin). The researchers also believe that low-dose naltrexone is antagonist of TLR4 receptor and acts as glial cells modulator. Based on the mechanism of action of low-doses of naltrexone, which is not fully known, researchers are trying to confirm reports concerning the efficacy and safety of the therapy in many diseases, including autoimmune disorders (including Crohn's disease, multiple sclerosis), fibromyalgia and chronic pain, cancer or dermatological diseases. The safety profile of naltrexone at standard doses (50-100 mg) is well known when the drug is used in accordance with registered indications. The information on the safety of LDN treatment protocol is still limited and the data collected is insufficient. Preliminary reports may suggest that treatment is relatively safe however, to confirm safety profile and effects of chronic use it is necessary to conduct extensive, long-term studies in large, varied populations. Despite the lack of registration in any indication and necessity of conducting extensive research on the safety and effectiveness of its use, this therapy has gained a wide range of supporters among both doctors and patients and has been adopted as an alternative off-label treatment. If the effectiveness and safety of LDN are confirmed, it will be undoubtedly a breakthrough therapy, willingly used by patients around the world due to its low cost, availability, safety profile and easy to use.
Low-dose naltrexone (LDN) – terapia naltreksonem w niskiej dawce polegająca na zastosowaniu naltreksonu w dawkach dobowych 10-cio krotnie niższych lub mniejszych (zwykle 1 mg – 5 mg) niż w zarejestrowanej terapii zyskuje co raz to większą popularność. W oparciu o mechanizm działania niskich dawek naltreksonu badacze starają się potwierdzić doniesienia dotyczące skuteczność i bezpieczeństwo terapii w wielu chorobach, w tym o podłożu autoimmunologicznym (między innymi: chorobie Leśniowskiego-Crohna, stwardnieniu rozsianym), fibromialgii i przewlekłym bólu, nowotworach czy chorobach dermatologicznych. Pomimo braku rejestracji w jakimkolwiek wskazaniu i potrzeby przeprowadzenia rozległych badań dotyczących bezpieczeństwa oraz skuteczności jej stosowania, terapia ta zyskała szerokie grono zwolenników zarówno wśród lekarzy jak i pacjentów i została przyjęta jako alternatywna metoda leczenia off-label.
Źródło:
Farmacja Polska; 2020, 75, 12; 676-686
0014-8261
2544-8552
Pojawia się w:
Farmacja Polska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anticancer activity of some polyamine derivatives on human prostate and breast cancer cell lines
Autorzy:
Szumilak, Marta
Galdyszynska, Malgorzata
Dominska, Kamila
Stanczak, Andrzej
Piastowska-Ciesielska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1038652.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
polyamine derivatives
prostate cancer
breast cancer
mitochondrial potential
cell cycle
apoptosis
Opis:
The aim of this study was to expand our knowledge about anticancer activity of some polyamine derivatives with quinoline or chromane as terminal moieties. Tested compounds were evaluated in vitro towards metastatic human prostate adenocarcinoma (PC3), human carcinoma (DU145) and mammary gland adenocarcinoma (MCF7) cell lines. Cell viability was estimated on the basis of mitochondrial metabolic activity using water-soluble tetrazolium WST1 to establish effective concentrations of the tested compounds under experimental conditions. Cytotoxic potential of polyamine derivatives was determined by the measurement of lactate dehydrogenase activity released from damaged cells, changes in mitochondrial membrane potential, the cell cycle distribution analysis and apoptosis assay. It was revealed that the tested polyamine derivatives differed markedly in their antiproliferative activity. Bischromane derivative 5a exhibited a rather cytostatic than cytotoxic effect on the tested cells, whereas quinoline derivative 3a caused changes in cell membrane integrity, inhibited cell cycle progression, as well as induced apoptosis of prostate and breast cancer cells which suggest its potential application in cancer therapy.
Źródło:
Acta Biochimica Polonica; 2017, 64, 2; 307-313
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
STUDIES TOWARDS HEMOCOMPATIBILITY OF POLYAMINE CONJUGATES WITH BICYCLIC SYSTEMS
Autorzy:
Szumilak, Marta
Markowicz-Piasecka, Magdalena
Mikiciuk-Olasik, Elzbieta
Stanczak, Andrzej
Sikora, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/895466.pdf
Data publikacji:
2018-08-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
coagulation
biocompatibility
fibrinolysis
erythrotoxicity
polyamine conjugates
Opis:
Assessing hemocompatibility of anticancer drug candidate is very important task due to the fact that coagulation disorders are often correlated with malignancy or induced by chemotherapy. The aim of this study was to examine the influence of some polyamine conjugates with bicyclic systems on the process of coagulation and fibrinolysis. In addition their effect on the healthy human erythrocytes (RBCs) was assessed. Prothrombin Time (PT), Activated Partial Tromboplastin Time (APTT), clot formation and lysis test (CL-test) were performed to evaluate the influence of some polyamine conjugates on plasma hemostasis. The effects of tested compounds on RBCs were assessed using hemolysis assays and microscopy studies. APTT and PT examination revealed that all tested compounds apart from the highest concentrations of compounds 3 and 5 did not exert significant effects on intrinsic and extrinsic coagulation pathways. Despite their substantial influence on the kinetic parameters of the process of clot formation and fibrinolysis, the examined compounds, over the entire concentration range, did not alter the overall potential of clot formation and lysis (CLAUC) suggesting that they might be regarded as biocompatible concerning plasma hemostasis. At potential therapeutic concentrations (constituting IC50 value for MCF-7 cells) tested polyamine conjugates showed no adverse effects on the membranes of RBCs. Promising antiproliferative activity of representative polyamine conjugates together with their hemocompatibility make them good anticancer drug candidates for further preclinical evaluation.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 4; 861-874
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predicted real solubility (– log x$\text{}_{2}$) and the level of hydrophilic-lipophilic balance (HLB$\text{}_{Requ.}$) of phytochemicals contained in extracts isolated from linden inflorescence (Tiliae flos) with solvents of diversified polarity (ε$\text{}_{M}$)
Autorzy:
Marczyński, Zbigniew
Zgoda, Marian Mikołaj
Stańczak, Andrzej
Nowak, Sławomira
Jambor, Jerzy
Skibska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/2048772.pdf
Data publikacji:
2019
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
real solubility
phytochemicals
Tiliae flos
level of hydrophilic-lipophilic balance (HLBRequ.)
rozpuszczalność rzeczywista
fitozwiązki
poziom równowagi hydrofilo-lipofilowej (HLBRequ.)
Opis:
Introduction: The broad spectrum of pharmacological properties of linden inflorescence extracts results from polarity and the level of hydrophilic-lipophilic balance of solvents (medium) used to separate compatible phytochemical structures with the expected pharmacotherapeutic profile. Objective: The use of the general Hildebrand-Scatchard-Fedors theory of solubility to calculate the predicted solubility of classes of phytochemicals contained in linden inflorescences (Tiliae flos) and the indication of those structures which, due to their high solubility in the medium, are responsible for the profile of pharmacological activity. Material and methods: The Hildebrand, Scatchard equation, supported with computational technique proposed by Fedors, allows calculation of the solubility parameters of the extraction medium. Despite application reservations, it is a fundamental tool for estimating the predictable solubility of phytochemicals in real solution. Results: The structure of phytochemicals isolated from linden inflorescences (Tiliae flos) owing to the use of solvents of significantly diversified polarity (– dielectric constant – ε$\text{}_{M}$) was the basis for calculating the molar evaporation energy – ΣΔE$\text{}_{i}$ (cal/mol) and molar volume – ΣΔV$\text{}_{i}$ (cm$\text{}^{3}$/mol) by Fedors method, which are fundamental quantities necessary to estimate the solubility parameter– δ$\text{}^{1}\text{}^{/}\text{}^{2}$ and required solubility level of hydrophilic-lipophilic balance – HLB$\text{}_{Requ.}$. Conclusions: Results of the presented research indicate that basing on the parameters characterizing the structure of phytochemicals and the calculated ideal (–logx$\text{}_{2}^{i}$) and predicted real (–logx$\text{}_{2}$) solubility, it is possible – using the general Hildebrand-Scatchard-Fedors theory of solubility – to choose selectively the cascade of extraction media in order to distinguish in the plant material chemical and structural individuals of different polarity.
Źródło:
Herba Polonica; 2019, 65, 3; 39-50
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Communication in the families of high-achieving students
Autorzy:
Sękowski, Andrzej Edward
Gwiazdowska-Stańczak, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/2129188.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
communication
family
family relations
high school achievement
Opis:
Good quality communication in the family is a source of positive relations among its members. It is the most important characteristic of a well-functioning family. Very interesting perceptions of communication in the family are held by high achieving students. In those young people, communication in the family correlates negatively with their high grade point average. Also, they evaluate positively communication in the family as a whole but less positively one-to-one verbal interactions with the mother and the father. This observation is explained by the fact that the family forms a system. Moreover, communication is associated with positive relationships and attitudes such as acceptance and autonomy, but correlates negatively with control, over-demanding behaviour, and inconsistency in the parents of high achieving students.
Źródło:
Polish Psychological Bulletin; 2018, 49, 4; 424-431
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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