Involvement of Src tyrosine kinase and protein kinase C in the expression of macrophage migration inhibitory factor induced by H2O2 in HL-1 mouse cardiac muscle cells

Macrophage migration inhibitory factor (MIF), a pleiotropic cytokine, plays an important role in the pathogenesis of atrial fibrillation; however, the upstream regulation of MIF in atrial myocytes remains unclear. In the present study, we investigated whether and how MIF is regulated in response to the renin-angiotensin system and oxidative stress in atrium myocytes (HL-1 cells). MIF protein and mRNA levels in HL-1 cells were assayed using immunofluorescence, real-time PCR, and Western blot. The result indicated that MIF was expressed in the cytoplasm of HL-1 cells. Hydrogen peroxide (H2O2), but not angiotensin II, stimulated MIF expression in HL-1 cells. H2O2-induced MIF protein and gene levels increased in a dose-dependent manner and were completely abolished in the presence of catalase. H2O2-induced MIF production was completely inhibited by tyrosine kinase inhibitors genistein and PP1, as well as by protein kinase C (PKC) inhibitor GF109203X, suggesting that redox-sensitive MIF production is mediated through tyrosine kinase and PKC-dependent mechanisms in HL-1 cells. These results suggest that MIF is upregulated by HL-1 cells in response to redox stress, probably by the activation of Src and PKC.

RNAi-mediated knockdown of FANCF suppresses cell proliferation, migration, invasion, and drug resistance potential of breast cancer cells

Fanconi anemia complementation group F protein (FANCF) is a key factor, which maintains the function of FA/BRCA, a DNA damage response pathway. However, the functional role of FANCF in breast cancer has not been elucidated. We performed a specific FANCF-shRNA knockdown of endogenous FANCF in vitro. Cell viability was measured with a CCK-8 assay. DNA damage was assessed with an alkaline comet assay. Apoptosis, cell cycle, and drug accumulation were measured by flow cytometry. The expression levels of protein were determined by Western blot using specific antibodies. Based on these results, we used cell migration and invasion assays to demonstrate a crucial role for FANCF in those processes. FANCF shRNA effectively inhibited expression of FANCF. We found that proliferation of FANCF knockdown breast cancer cells (MCF-7 and MDA-MB-435S) was significantly inhibited, with cell cycle arrest in the S phase, induction of apoptosis, and DNA fragmentation. Inhibition of FANCF also resulted in decreased cell migration and invasion. In addition, FANCF knockdown enhanced sensitivity to doxorubicin in breast cancer cells. These results suggest that FANCF may be a potential target for molecular, therapeutic intervention in breast cancer.

Inclusion or Exclusion? Trade union strategies and Labor migration

Inclusion or Exclusion? Trade Union Strategies and Labor Migration This research identified and analyzed immigration-related strategies of the Finnish Construction Trade Union (FCTU) and the Service Union United (SUU); e.g. how the unions react to labor immigration, whether unions seek to include migrants in the unions, and what is migrants’ position in the unions. The two unions were chosen as the focus of the research because the workforce in the sectors they represent is migrant-dense. The study also analyzed the experiences that migrants who work in these sectors have with trade unions. The Estonian labor market situation –including the role of Estonian trade unions– was also examined as it has a considerable impact on the operating environment of the FCTU. The results of the study indicate that immigration is a contradictory issue for both unions. On the one hand, they strive to include migrants as trade union members and to defend migrants’ labor rights. On the other hand, they, together with their umbrella organization the Central Organisation of Finnish Trade Unions (SAK), seek to prevent labor immigration from outside the EU and EEA countries. They actively defend current labor immigration restrictions by drawing atten- tion to high unemployment figures and to the breaches of working conditions migrants encounter. In contrast, the employer organizations promote a more liberal state policy on labor immigration because they see it as a boost for business. Both the unions and the employer organizations ground their arguments on national interest. However, the position of the trade union movement is not uniform: unions belonging to the Confederation of Unions for Professionals and Managerial Staff in Finland (Akava) embrace more liberal labor immigration stances than the SAK. A key trade union strategy is to try to guarantee that migrants’ working condi- tions do not differ from those of the natives. The FCTU and the SUU inform migrants about Finnish collective agreements and trade union membership in the most common migrant languages. This is important for the unions because it is not in their interest that migrants’ working conditions are undercut. The interviewed migrants said that natives had more negotiating power with employers, which is often negatively portrayed in migrants’ working conditions. Migrants perceive that trade unions have an important role in protecting their working conditions. However, they stressed that migrants’ knowledge of unions is often very limited. The number of migrants in both two unions studied here is increasing. Espe- cially in the SUU, a considerable proportion of the new members are migrants. The FCTU is in a more challenging situation than the SUU because migrant construc- tion workers often work only for short periods in Finland and are consequently not interested in becoming union members. The unions’ strategies partly differ: the FCTU was the first Finnish trade union to establish a trade union branch/lo- cal for migrant members. The goal is to facilitate migrants’ inclusion in the union and to highlight the specific problems they face. The SUU, for its part, insists that such a special strategy would exclude migrants within the union organization. Despite the unions’ strategies, migrants are still underrepresented as union members and officials, which some of the interviewed migrants saw as a problem. Immigrants’ perception of trade unions was pragmatic: they had joined unions when membership yielded concrete benefits. In spite of the unions’ strategies, migrants –and temporary migrants– encoun- ter specific problems in terms of working conditions. Both unions demand more state intervention to protect migrants’ labor rights because overseeing working conditions consumes union resources. However, without the unions’ intervention, these problems would be more common than is currently the case. For instance, some of the interviewed migrants had received trade union assistance in claim- ing unpaid wages. The study demonstrated with the help of building on Walter Korpi’s power resources theory, that immigration is a power resource issue for the unions: suc- cessful immigration-related strategies strengthen unions –and vice versa. The research also showed how the unions’ operating environments constrain and enable their immigration-related strategies. This study has illuminated a previously ignored dimension: the immigrant- inclusive strategies of the Finnish trade unions. The research material consists of 78 qualitative interviews, observation in trade union events, and trade unions’ and employer organizations’ public state- ments.

Comparison of baseline data between chronic kidney disease patients starting hemodialysis who live near and far from the dialysis center

Introduction: The treatment offered to chronic kidney disease (CKD) patients before starting hemodialysis (HD) impacts prognosis. Objective: We seek differences among incident HD patients according to the distance between home and the dialysis center. Methods: We included 179 CKD patients undergoing HD. Patients were stratified in two groups: "living near the dialysis center" (patients whose hometown was in cities up to 100 km from the dialysis center) or as "living far from the dialysis center" (patients whose hometown was more than 100 km from the dialysis center). Socioeconomic status, laboratory results, awareness of CKD before starting HD, consultation with nephrologist before the first HD session, and type of vascular access when starting HD were compared between the two groups. Comparisons of continuous and categorical variables were performed using Student's t-test and the Chi-square test, respectively. Results: Ninety (50.3%) patients were classified as "living near the dialysis center" and 89 (49.7%) as "living far from the dialysis center". Patients living near the dialysis center were more likely to know about their condition of CKD than those living far from the dialysis center, respectively 46.6% versus 28.0% (p = 0.015). Although without statistical significance, patients living near the dialysis center had more frequent previous consultation with nephrologists (55.5% versus 42.6%; p = 0.116) and first HD by fistula (30.0% versus 19.1%; p = 0.128) than those living far from the dialysis center. Conclusion: There are potential advantages of CKD awareness, referral to nephrologists and starting HD through fistula among patients living near the dialysis center.

”Because of how it makes me feel” – vuorovaikutuksen muodot ja merkitys elämysten tuottamisessa ja kokemisessa live-konserteissa

Live-konserttien tarjonnan kasvu ja kysynnän uhkaava lasku ovat johtaneet siihen, että artistit ja tapahtumanjärjestäjät kilpailevat yleisön suosiosta ja menestyksestä aiempaa enemmän. Ratkaisuna kuluttajille pyritään luomaan elämyksellisiä kulutusympäristöjä, joissa heille tarjotaan ikimuistoinen konserttikokemus. Tutkimuksen tarkoituksena oli tarkastella vuorovaikutuksen muotoja ja merkitystä elämysten tuottamisessa ja kokemisessa live-konserteissa. Tutkimuksessa oltiin kiinnostuneita siitä, millaista vuorovaikutus live-konserteissa on, keiden välillä sitä on ja mitkä tekijät edesauttavat tai haittaavat vuorovaikutuksen ja elämyksen syntymistä. Tavoitteena oli tunnistaa tekijät, joilla vuorovaikutukseen voidaan vaikuttaa. Tutkimuksen teoriakeskustelu pohjautui elämyksiä, arvon yhteisluomista ja vuorovaikutusta käsittelevään kirjallisuuteen sekä musiikin kuluttamista käsittelevään kirjallisuuteen. Tutkimuksessa oli laadullinen ote, ja tutkimusaineisto muodostui kolmen suomalaisen artistin, Jukka Pojan, Olavi Uusivirran ja Apulannan, konserttien havainnoinnista sekä artisti- ja yleisöhaastatteluista. Live-konserteissa tuottajan ja kuluttajan roolit sekoittuvat, sillä artisti tuottaa, jakaa ja kokee elämyksiä yhdessä yleisön kanssa. Elämys on subjektiivinen kokemus, mutta se syntyy vuorovaikutuksessa muiden kanssa. Live-konserteissa tapahtuu yhtä aikaa monensuuntaista vuorovaikutusta, ja siksi vuorovaikutuksen merkitys elämysten tuottamisessa ja kokemisessa on suurempi kuin perinteisessä palveluasetelmassa. Vuorovaikutus live-konserteissa on moninaista sen dynaamisuuden, ajassa tunnistettavien vaiheiden, eri vuorovaikutustyyppien ja niiden yhtäaikaisuudesta johtuvien eri tasojen takia. Vuorovaikutusta voi olla yksittäisen artistin tai yhtyeen ja yleisön välillä sekä artistin tai yhtyeen ja yksilön välillä. Sitä voi kuitenkin olla myös yleisön sekä artistien keskuudessa. Tämä johtaa siihen, että vuorovaikutuksen muodot ovat monimutkaisia, eikä selkeää muotokategoriaa voida siksi osoittaa. Toimintaympäristö, tapahtuman luonne, fyysinen ja henkinen etäisyys sekä yleisön motiivit osallistua tapahtumaan ohjaavat vuorovaikutuksen suuntaa ja intensiteettiä. Toimintaympäristötekijöillä voidaan edesauttaa tai haitata vuorovaikutuksen ja elämyksen syntymistä, ja tapahtumanjärjestäjällä on vastuu vuorovaikutusmahdollisuuden luomisessa. Artistin vastuulla on kiinnittää vuorovaikutus artistia ja yleisöä yhdistävään artisti- tai konserttilähtöiseen tekijään, joka on koko vuorovaikutuksen perusta. Siinä onnistuminen nostaa vuorovaikutuksen intensiteettiä ja johtaa todennäköisimmin hurmokseen, joka liikuttaa massoja, ei vain yksilöä