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    Wyświetlanie 1-11 z 11
    Tytuł:
    Cancer immunotherapy using cells modified with cytokine genes.
    Autorzy:
    Kowalczyk, Dariusz
    Wysocki, Piotr
    Mackiewicz, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1043434.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    cancer
    cancer vaccines
    cytokines
    dendritic cells
    gene therapy
    Opis:
    The ability of various cytokines to hamper tumor growth or to induce anti-tumor immune response has resulted in their study as antitumor agents in gene therapy approaches. In this review we will concentrate on the costimulation of antitumor immune responses using modification of various cell types by cytokine genes. Several strategies have emerged such as (i) modification of tumor cells with cytokine genes ex vivo (whole tumor cell vaccines), (ii) ex vivo modification of other cell types for cytokine gene delivery, (iii) delivery of cytokine genes into tumor microenvironment in vivo, (iv) modification of dendritic cells with cytokine genes ex vivo. Originally single cytokine genes were used. Subsequently, multiple cytokine genes were applied simultaneously, or in combination with other factors such as chemokines, membrane bound co-stimulatory molecules, or tumor associated antigens. In this review we discuss these strategies and their use in cancer treatment as well as the promises and limitations of cytokine based cancer gene therapy. Clinical trials, including our own experience, employing the above strategies are discussed.
    Źródło:
    Acta Biochimica Polonica; 2003, 50, 3; 613-624
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Expression of PiT1 and PiT2 retroviral receptors and transduction efficiency of tumor cells*.
    Autorzy:
    Grabarczyk, Piotr
    Wysocki, Piotr
    Gryska, Katarzyna
    Mackiewicz, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1043759.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    renal carcinoma
    retroviral vectors
    PiT1 and PiT2 retroviral receptors
    human melanoma
    Opis:
    Recombinant retroviral vectors are still the most common gene delivery vehicles for gene therapy purposes, especially for construction of genetically modified tumor vaccines (GMTV). However, these vehicles are characterized by relatively low titre and in the case of many tumor cell lines, low transduction efficiency. We constructed bicistronic retroviral vector pseudotypes of amphotropic murine leukemia virus (A-MuLV) and gibbon ape leukemia virus (GaLV), encoding enhanced green fluorescent protein (EGFP) as a rapid and easily detectable reporter gene. Transduction of five different human melanoma and four renal carcinoma cell lines by these two virus pseudotypes revealed differences in transduction efficiency, which wase markedly lower for the renal carcinoma cell lines. Stimulation of retroviral receptor expression (PiT1 and PiT2) by phosphate depletion induced a limited increase of receptor mRNA levels, but did not improve the gene transfer efficiency. In contrast, simultaneous transduction with both vector pseudotypes markedly increased the transduction efficiency, compared to GaLV or A-MuLV alone. The same effect could be achieved by several repeated exposures of target cells to fresh vector preparation. Overexpression of GaLV receptor (PiT1) in target cells significantly increased the transduction rate and enabled retrovirus mediated gene transfer into the cells which normally are not transducible by GaLV pseudotypes. We demonstrated that, using different transduction strategies, the relatively inefficient, widely used retroviral vector systems could be significantly improved.
    Źródło:
    Acta Biochimica Polonica; 2002, 49, 2; 333-339
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czy warto profilaktycznie usuwać jajniki u chorych na raka jelita grubego?
    Prophylactic ovariectomy in patients with colorectal cancer: is it justified?
    Autorzy:
    Wysocki, Wojciech M.
    Kojs, Zbigniew
    Mituś, Jerzy
    Stelmach, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1031292.pdf
    Data publikacji:
    2013
    Wydawca:
    Medical Communications
    Tematy:
    rak jelita grubego
    przerzut w jajniku
    częstość
    rokowanie
    profilaktyczne wycięcie jajników
    ovarian metastasis
    incidence
    prognosis
    prophylactic ovariectomy
    colorectal cancer
    Opis:
    The article is a review of available literature concerning the incidence of synchronous and metachronous metastases of colorectal cancer to the ovaries. A separate analysis included data from autopsy and clinical studies (incidence in historic series: 5–10% in the former and 3–14% in the latter). Recent studies estimate the incidence of metastases of large bowel cancer to the ovaries at 0.9–2.9%. At the time of diagnosis, metastasis to the ovary usually takes the form of solid or solid-cystic tumor of over 4 cm in diameter, often bilateral (5–70%). Recent studies did not confirm higher incidence of metastases to the ovaries of tumors located in the rectum versus those located in the colon. Furthermore, we discuss prognostic value of metastases to the ovaries considering current TNM classification, highlighting newly created categories M1a (isolated metastasis, e.g. to the ovary) and M1b (multiple distant metastases). The authors suggest simplified clinical recommendations, advocating against prophylactic ovariectomy of grossly normal ovaries. On the other hand, excision of tumor-invaded ovary in premenopausal women or of both ovaries (diseased and normal contralateral) in postmenopausal women, appears justified. However, before undertaking such a procedure, one must be sure about absence of other tumor foci or – if they are present – about feasibility of complete excision of all other extraovarian metastases.
    W artykule dokonano analizy dostępnego piśmiennictwa na temat częstości występowania synchronicznych i metachronicznych przerzutów raka jelita grubego do jajników. Odrębnie analizowano dane pochodzące z badań pośmiertnych (częstość w badaniach historycznych 5–10%) oraz klinicznych (częstość w badaniach historycznych 3–14%). Częstość przerzutów raka jelita grubego w jajniku w aktualnych badaniach ocenia się na 0,9–2,9%. Przerzut w jajniku zwykle w chwili rozpoznania ma postać guza przekraczającego 4 cm średnicy, o budowie litej lub lito-torbielowatej, często obustronnego (u 50–70%). Nie obserwuje się obecnie częstszego pochodzenia przerzutów w jajniku z raka zlokalizowanego w odbytnicy w porównaniu z okrężnicą. Ponadto w tekście omówiono rokownicze znaczenie przerzutów w jajnikach w świetle aktualnej klasyfikacji TNM, zwracając uwagę na utworzenie nowych kategorii M1a (izolowany przerzut, między innymi w jajniku) i M1b (mnogie przerzuty odległe). Autorzy przedstawili także uproszczone wskazówki klinicznie, nie zalecając profilaktycznego wycinania niezmienionych jajników. Jednocześnie uzasadnione wydaje się wycięcie zmienionego jajnika u chorych przed menopauzą lub obu jajników (zmienionego i niezmienionego) u chorych po menopauzie. Warunkiem podjęcia zabiegu jest upewnienie się co do nieobecności innych ognisk choroby lub – w razie obecności takich zmian – możliwości doszczętnego usunięcia wszystkich pozajajnikowych przerzutów.
    Źródło:
    Current Gynecologic Oncology; 2013, 11, 1; 55-61
    2451-0750
    Pojawia się w:
    Current Gynecologic Oncology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Learning curve for laparoscopic Roux-en-Y gastric bypass based on the experience of a newly created bariatric center
    Autorzy:
    Dworak, Jadwiga
    Wysocki, Michał
    Rzepa, Anna
    Pędziwiatr, Michał
    Radkowiak, Dorota
    Budzyński, Andrzej
    Major, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1391721.pdf
    Data publikacji:
    2020
    Wydawca:
    Index Copernicus International
    Tematy:
    bariatric center
    clinical competence
    laparoscopic Roux-en-Y gastric bypass
    learning curve
    perioperative complications
    surgical training
    Opis:
    Introduction: Laparoscopic Roux-en-Y gastric bypass (LRYGB) is one of the most common treatments for morbid obesity. The learning curve for this procedure is 50–75 cases for an independent surgeon, and it is considered the most important factor in decreasing complications and mortality. We present our experience and learning curve with LRYGB for a newly established bariatric center in Poland. Material and methods: A prospectively collected database containing 285 LRYGB procedures performed in the II Department of General Surgery of the Jagiellonian University MC in Krakow between 06.2010 and 03.2019 was retrospectively reviewed. Patients were divided into groups of 30 (G1–G10) in the order of the procedures performed by each surgeon. The study analyzed the course of the operation and patient hospitalization, comparing those groups. Learning curve for the newly created bariatric center was established. Results: Operative time in G1–G3 differed significantly from G4–G10 (P < 0.0001). The stabilization point was the 90th procedure. Perioperative complications were observed in 36 (12.63%) patients. Perioperative complications, intraoperative difficulties and adverse events did not differ importantly among groups. Liberal use of “conversions of the operator” from a surgeon to a senior surgeon provides reasonable safety and prevents complications. Conclusions: The institutional learning process stabilization point for LRYGB in a newly established bariatric center is around the 90th operation. LRYGB can be a safe procedure from the very beginning in newly established bariatric centers. Specific bariatric training with active proctoring by an experienced surgeon in a bariatric centre can improve the laparoscopic gastric bypass outcome during the learning curve.
    Źródło:
    Polish Journal of Surgery; 2020, 92, 4; 23-30
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Usunięcie węzłów chłonnych pachwinowych w przypadku raka sromu – punkt widzenia chirurga i patomorfologa
    Inguinal lymphadenectomy in case of vulvar carcinoma – point of view of a surgeon and a pathologist
    Autorzy:
    Mituś, Jerzy W.
    Wysocka, Joanna
    Kojs-Pasińska, Ewelina
    Kenig, Jakub
    Komorowski, Andrzej
    Wysocki, Wojciech M.
    Kojs, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/1030148.pdf
    Data publikacji:
    2016
    Wydawca:
    Medical Communications
    Tematy:
    inguinal lymphadenectomy
    lymph drainage
    metastases
    pathologic examination
    vulvar carcinoma
    badania patomorfologiczne
    limfadenektomia pachwinowa
    przerzuty
    rak sromu
    spływ chłonki
    Opis:
    Vulvar carcinoma is the fourth most prevalent cancer of genitals in women (accounting for 5% of all neoplasms from this group). Histologically, we differentiate epithelial neoplasms – in 90% of cases we are dealing keratotic squamous cell carcinoma – and non-epithelial ones. The majority of vulvar carcinomas occur at a postmenopausal age and are related to chronic bacterial or viral infection (human papilloma virus). Lymph from the vulva is drained to three groups of inguinal lymph nodes and to iliac lymph nodes. Depending on the location of a neoplastic lesion, vulvar carcinoma metastasizes unilaterally or bilaterally. The basic methods of treatment are surgical removal or inguinal lymphadenectomy – both superficial and deep. This article presents a detailed anatomy of the inguinal-iliac lymphatic system as well as the most widely used surgical techniques and the most common postoperative complications. Cooperation with the clinician is crucial to present a valuable pathology report. In hospitals with an anatomic pathology unit on-site, the surgeon should send a non-fixed material, and optimally – in sterile conditions. In hospitals without an anatomic pathology unit, the specimen must be fixed. For the pathologist’s assessment of pN stage – in accordance with the TNM classification of 2010 – to be reliable, the operative specimen comprising the inguinal lymphatic system must include at least six lymph nodes. Obtaining satisfactory management results requires a good knowledge of anatomy of this area and surgical techniques as well as a proper preparation of the specimen for pathologic examination.
    Rak sromu plasuje się na czwartym miejscu wśród najczęstszych nowotworów narządów płciowych u kobiet (stanowi około 5% zachorowań na nowotwory z tej grupy). Histologicznie wyróżnia się zmiany pochodzenia nabłonkowego – w 90% jest to rak płaskonabłonkowy rogowaciejący – i nienabłonkowego. Większość raków sromu występuje w wieku pomenopauzalnym i ma związek z przewlekłą infekcją bakteryjną bądź wirusową (wirus brodawczaka ludzkiego). Chłonka ze sromu drenowana jest do trzech grup węzłów chłonnych pachwinowych i do węzłów biodrowych. W zależności od lokalizacji zmiany nowotworowej rak sromu przerzutuje jednostronnie lub obustronnie. Podstawowymi metodami leczenia pozostają chirurgiczne wycięcie oraz limfadenektomia pachwinowa powierzchowna i głęboka. W artykule zaprezentowano szczegółową budowę anatomiczną układu chłonnego pachwinowo-biodrowego, a także najpowszechniej wykorzystywane techniki operacyjne i najczęstsze powikłania zabiegu. Kluczowa dla przedstawienia wartościowego raportu patomorfologicznego jest współpraca z klinicystą. W szpitalach dysponujących własnym zakładem patomorfologii chirurg powinien przesłać materiał nieutrwalony, optymalnie – w sposób jałowy. W szpitalach bez zakładu patomorfologii preparat należy utrwalić. Aby patomorfolog mógł dokonać wiarygodnej oceny cechy pN – zgodnie z klasyfikacją TNM z 2010 roku – preparat operacyjny obejmujący pachwinowy układ chłonny powinien zawierać co najmniej sześć węzłów chłonnych. Podstawowe znaczenie dla osiągnięcia dobrych wyników leczenia mają poznanie budowy anatomicznej tego regionu i technik operacyjnych oraz prawidłowe przygotowanie preparatu do badania patomorfologicznego.
    Źródło:
    Current Gynecologic Oncology; 2016, 14, 1; 23-29
    2451-0750
    Pojawia się w:
    Current Gynecologic Oncology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the Results of Surgical Treatment of Zenker’S Diverticulum in Own Material
    Autorzy:
    Bobkiewicz, Adam
    Banasiewicz, Tomasz
    Krokowicz, Łukasz
    Dryjas, Andrzej
    Wykrętowicz, Mateusz
    Katulska, Katarzyna
    Borejsza-Wysocki, Maciej
    Malinger, Stanisław
    Drews, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/1395561.pdf
    Data publikacji:
    2015-03-01
    Wydawca:
    Index Copernicus International
    Tematy:
    Zenker diverticulum
    diverticulectomy
    diverticulopexy
    Opis:
    Zenker diverticulum (ZD) is the most common type of diverticula of the esophagus. Most often refers to men with a peak incidence in the seventh and eighth decade of life. In the majority diverticula remains asymptomatic and in patients with symptomatic course of the disease symptoms are often nonspecific. Aim of the study was to present the authors’ own experience in surgical treatment of Zenker diverticulum. Material and methods. In this paper we present an analysis of 31 patients with confirmed ZD treated surgically at the Clinic in 2004-2014. Patients were analyzed in terms of age, gender, clinical symptoms, diverticulum size, type of surgery, the time to return to the oral intake, hospital stay and perioperative complications. Results. 22 men and 9 women were enrolled it this study. The mean age of the patients was 64.8 (SD, 10.7; in the range of 28 to 82 years). 29 patients (93.5%) underwent resection of the diverticulum, while diverticulopexy was performed in two patients. In 25 (80.6%) cases stapler device was used, while in 4 (12.9%) resection was performed manually. The average size of resected diverticulum was 4.9 cm (SD, 1.5). Following the surgery in four patients (12.9%) complications were present. The average operating time was 118.7 minutes (SD, 42.2, in the range of 50 to 240 minutes). The mean length of hospital stay was 9.3 (SD, 3.3). Conclusions. Surgical treatment of ZD is associated with high effectiveness and low recurrence rate. Despite the advantages of endoscopic techniques, surgical treatment is characterized by one- stage procedure. The use of mechanical suture (stapler) significantly improves the operation, although on the basis of our own analysis there was no superiority revealed over hand sewn. Unquestionable adventage of classical technique is the opportunity to histopathological evaluation of resected diverticulum what is impossible to achieve in endoscopic techniques.
    Źródło:
    Polish Journal of Surgery; 2015, 87, 3; 109-115
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of bariatric surgery on cardiovascular risk factors among morbidly obese patients
    Autorzy:
    Major, Piotr
    Kowalczuk, Aleksandra
    Wysocki, Michał
    Osadnik, Sonia
    Pędziwiatr, Michał
    Głuszewska, Anna
    Pisarska, Magdalena
    Małczak, Piotr
    Lasek, Anna
    Kisielewski, Michał
    Budzyński, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1393464.pdf
    Data publikacji:
    2017
    Wydawca:
    Index Copernicus International
    Tematy:
    morbid obesity
    bariatric surgery
    laparoscopic sleeve gastrectomy
    laparoscopic Roux-en-Y Gastric Bypass cardiovascular risk factors
    SCORE
    Framingham
    Opis:
    Aim of the study: The aim of this study was to evaluate the influence of laparoscopic sleeve gastrectomy and laparoscopic Roux-en-Y gastric by-pass on risk factors of cardiovascular diseases. Material and methods: We analyzed prospectively collected data of patients operated for morbid obesity who were qualified for laparoscopic sleeve gastrectomy (LSG) or laparoscopic Roux-en-Y gastric by-pass (LRYGB). Risk factors for wyłączecardiovascular diseases were assessed with the SCORE scale and both full and hard Framingham cardiovascular risk scores (FCRs). The data were collected on admission and one year after the procedures. We enrolled 264 patients (119 females, 116 males, 40.2±9.9 years old), of whom 117 underwent LRYGB and 118 LSG, respectively. Results: Preoperatively, 12% of patients were in the high-risk category of the SCORE scale, 65% were in the moderate risk category, and 24% were in the low-risk category. The median score of the SCORE scale was 1 (1-2). Lipid-based full FCR was 34.5% (24%-68%) and the hard FCR was 17.5% (10%-52%), while the respective BMI-based FCRs were 59% (31%-84%) and 37% (15%-67%). One year after the procedures, the mean %EBMIL (62.88%±20.02%) and %EWL (53.18%±15.87) were comparable between both procedures. Hypertension treatment was not necessary in 33 patients after LSG and in 55 after LRYGB. Diabetes mellitus remitted in 9 and 29 patients, respectively. Both procedures significantly reduced high and moderate risk prevalence in the SCORE scale in favor of the low risk category. Surgical interventions resulted in significant reductions of FCRs 1 year after surgery ( p<0.001). Conclusions: Both LSG and LRYGB lead to a significant and comparable body mass reduction. Both procedures significantly decrease of the risk of cardiovascular diseases, based on SCORE and Framingham scales.
    Źródło:
    Polish Journal of Surgery; 2017, 89, 1; 41-49
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of intracellular idarubicin and daunorubicin levels on drug cytotoxicity in childhood acute leukemia.
    Autorzy:
    Styczyński, Jan
    Wysocki, Mariusz
    Dębski, Robert
    Kurylak, Andrzej
    Balwierz, Walentyna
    Rokicka-Milewska, Roma
    Matysiak, Michał
    Balcerska, Anna
    Kowalczyk, Jerzy
    Wachowiak, Jacek
    Sońta-Jakimczyk, Danuta
    Chybicka, Alicja
    Powiązania:
    https://bibliotekanauki.pl/articles/1043814.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    P-glycoprotein
    acute myeloblastic leukemia
    anthracyclines
    acute lymphoblastic leukemia
    drug resistance
    Opis:
    Uptake and efflux of two anthracyclines, idarubicin (IDA) and daunorubicin (DNR), was studied in childhood acute leukemia samples. A comparison of IDA and DNR transport phenomena in relation to drug cytotoxicity and expression of P-glycoprotein (PGP) was made. Intracellular content of IDA/DNR was determined by flow cytometry using the fluorescent properties of the drugs. In vitro drug cytotoxicity was measured by the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) assay. PGP expression was analysed by flow cytometry. The uptake and efflux rates were non-significantly higher for IDA than DNR. There were no differences between three types of leukemia with respect to drug content during accumulation and retention. After correction for the cell volume, intracellular concentration of both drugs in each moment of uptake and efflux was significantly lower in relapsed ALL and AML samples in comparison with initial ALL cells. Efflux, but not uptake, of both drugs was inversely correlated with PGP expression and IDA, but not DNR, cytotoxicity. The cytotoxicity was correlated with drug accumulation for both drugs and with drug retention for IDA. In conclusion, it seems that (1) intracellular content was related to the lipophilic properties of the drugs rather than to the type of leukemia, (2) decreased intracellular concentration of both drugs might have an impact on compromised therapy results in AML and relapsed ALL children, (3) IDA presents higher cytotoxicity, which possibly might be decreased by the presence of PGP. These results might have a practical impact on the rational design of new chemotherapy protocols.
    Źródło:
    Acta Biochimica Polonica; 2002, 49, 1; 99-107
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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