Chemotherapy-Induced Late Transgenerational Effects in Mice

To our knowledge, there is no report on long-term reproductive and developmental side effects in the offspring of mothers treated with a widely used chemotherapeutic drug such as doxorubicin (DXR), and neither is there information on transmission of any detrimental effects to several filial generations. Therefore, the purpose of the present paper was to examine the long-term effects of a single intraperitoneal injection of DXR on the reproductive and behavioral performance of adult female mice and their progeny. C57BL/6 female mice (generation zero; G0) were treated with either a single intraperitoneal injection of DXR (G0-DXR) or saline (G0-CON). Data were collected on multiple reproductive parameters and behavioral analysis for anxiety, despair and depression. In addition, the reproductive capacity and health of the subsequent six generations were evaluated. G0-DXR females developed despair-like behaviors; delivery complications; decreased primordial follicle pool; and early lost of reproductive capacity. Surprisingly, the DXR-induced effects in oocytes were transmitted transgenerationally; the most striking effects being observed in G4 and G6, constituting: increased rates of neonatal death; physical malformations; chromosomal abnormalities (particularly deletions on chromosome 10); and death of mothers due to delivery complications. None of these effects were seen in control females of the same generations. Long-term effects of DXR in female mice and their offspring can be attributed to genetic alterations or cell-killing events in oocytes or, presumably, to toxicosis in non-ovarian tissues. Results from the rodent model emphasize the need for retrospective and long-term prospective studies of survivors of cancer treatment and their offspring

The overstated merits of proportional representation. The Republic of Macedonia as a natural experiment for assessing the impact of electoral systems on descriptive representation

For the comparative study of the effects of electoral systems on the descriptive representation of ethnic minorities in parliament, Macedonia is a highly interesting case because the country had several elections under majoritarian as well as under proportional systems. Whereas most observers claim that ethnic Albanians have benefitted from the introduction of proportional representation, the article argues that the merits of PR have been overstated. First, scholars have often only reported members of political parties but not independent candidates in parliament. Second, when comparing the share of seats before and after the introduction of PR, the growing share of the Albanians in the population is usually ignored. © 2014 The Editor of Ethnopolitics