Propanil Exposure Induces Delayed but Sustained Abrogation of Cell-Mediated Immunity through Direct Interference with Cytotoxic T-Lymphocyte Effectors

The postemergent herbicide propanil (PRN; also known as 3,4-dichloropropionanilide) is used on rice and wheat crops and has well-known immunotoxic effects on various compartments of the immune system, including T-helper lymphocytes, B lymphocytes, and macrophages. It is unclear, however, whether PRN also adversely affects cytotoxic T lymphocytes (CTLs), the primary (1°) effectors of cell-mediated immunity. In this study we examined both the direct and indirect effects of PRN exposure on CTL activation and effector cell function to gauge its likely impact on cell-mediated immunity. Initial experiments addressed whether PRN alters the class I major histocompatibility complex (MHC) pathway for antigen processing and presentation by antigen-presenting cells (APCs), thereby indirectly affecting effector function. These experiments demonstrated that PRN does not impair the activation of CTLs by PRN-treated APCs. Subsequent experiments addressed whether PRN treatment of CTLs directly inhibits their activation and revealed that 1° alloreactive CTLs exposed to PRN are unimpaired in their proliferative response and only marginally inhibited in their lytic activity. Surprisingly, secondary stimulation of these alloreactive CTL effectors, however, even in the absence of further PRN exposure, resulted in complete abrogation of CTL lytic function and a delayed but significant long-term effect on CTL responsiveness. These findings may have important implications for the diagnosis and clinical management of anomalies of cell-mediated immunity resulting from environmental exposure to various herbicides and other pesticides

Fighting Putin and the Kremlin’s grip in neo-authoritarian Russia: the experience of liberal journalists

Slavtcheva-Petkova, V. (2017). Fighting Putin and the Kremlin’s grip in neo-authoritarian Russia: the experience of liberal journalists. Journalism. Copyright © [2017]. Reprinted by permission of SAGE Publications.Russia is one of the most dangerous countries for journalists and the conflict with Ukraine and Russia’s involvement in Syria present even further challenges for the future of Russian journalism. In addition to the financial pressures, physical attacks, abductions and harassment, liberal journalists now face an increasing threat to the democratising role they see themselves as playing. President Vladimir Putin’s soaring popularity and the elaborate range of tactics used to suppress press freedom are forcing liberal media to rethink their mission(s) and identity(ies). This paper presents empirical evidence on the range of tactics used by Russian authorities as well as the coping strategies adopted by journalists. The study shows that some Russian media and journalists demonstrate a great degree of resilience in their efforts to expose wrongdoings and hold the powerful to account. The article questions the applicability of Western-centric normative media system theories because it shows that the breadth, depth, and mechanisms of control in modern-day Russia are very different from the ones used during Soviet times, and yet, Russian media and society do not appear to be on a linear journey from authoritarianism to democracy. The article presents the findings of a semi-ethnographic study of some of Russia’s most influential liberal news outlets – Novaya Gazeta, Radio Echo of Moscow and Radio Free Europe/Liberty. The study was conducted in May 2014 in the midst of the conflict with Ukraine. It involved observations of editorial meetings, documentary analysis and interviews with editors, deputy editors and journalists

Does inequality erode generalized trust? Evidence from Romanian youths

Generalized trust is a critical component of liberal democratic citizenship. We evaluate the extent to which exposure to socioeconomic inequality erodes trust among Romanian youths. Using national survey data of Romanian eighth-grade and high school students, we evaluate this effect as a product of socioeconomic diversity within the classroom, controlling for the social status of the students as well as socioeconomic inequality within the community where the school is located. Our analysis shows that generalized trust is higher for students in higher grades. However, despite this maturing effect, students exposed to greater levels of socioeconomic diversity have significantly lower levels of trust. The effect is particularly acute for students in the ninth grade. This finding holds when controlling for socioeconomic diversity and polarization in the community. The result reinforces the idea that generalized trust develops early in one’s life and is quite stable, although a major life transformation, such as entering high school, may alter trust depending on the social context