PFOS Disrupts Early Development in Stem Cell Model

In this study, researchers investigated three already regulated but highly persistent PFAS compounds: PFOS, PFOA, and PFHxS. Using human pluripotent stem cells, they generated a three-dimensional cellular model recapitulating several aspects of early human development occurring shortly after embryo implantation in the uterus, including the formation of primordial germ cells, the precursors of sperm and eggs (source ID: 1). The disrupting effects occur at levels found in the blood of pregnant women. [1]

Of the three substances studied, PFOS had the most pronounced effect. During the four-day experiments, the embryo-like structures grew more slowly and remained smaller than untreated controls, an effect observed even at the lowest concentration tested: 7 nanomoles per liter (source ID: 1). This baseline concentration was selected because it corresponds to PFOS levels measured in the blood serum of pregnant women participating in the Swedish SELMA study. Although early germ cells still formed following PFOS exposure, their gene expression patterns were substantially altered. [1]

At the baseline concentration tested, the activity of 746 genes differed from that of the control group, leading to the repression of biological processes involved in development and cell signaling (source ID: 1). It is important to note that, although this model captures key aspects of early post-implantation development, it does not fully recapitulate a human embryo or the complex environment of the womb. Consequently, complementary studies, including animal models and human epidemiological data, will be needed to validate the long-term consequences of early prenatal exposure to PFAS. [1]

Research using stem cell-derived models of early human development suggests that PFOS, a persistent substance belonging to the PFAS group, can interfere with processes critical for early germ cell and embryonic development (source ID: 1). The study, from Karolinska Institutet, is published in the journal Human Reproduction Open. PFAS are a large group of synthetic chemicals used in products such as water-repellent materials, food packaging, cosmetics, and many other consumer goods. Because these substances break down extremely slowly, they can persist in the environment for decades, which has earned them the nickname "forever chemicals." [1]

In this study, researchers investigated three already regulated but highly persistent PFAS compounds: PFOS, PFOA, and PFHxS. Using human pluripotent stem cells, they generated a three-dimensional cellular model recapitulating several aspects of early human development occurring shortly after embryo implantation in the uterus, including the formation of primordial germ cells, the precursors of sperm and eggs (source ID: 1). The disrupting effects occur at levels found in the blood of pregnant women. [1]

Of the three substances studied, PFOS had the most pronounced effect. During the four-day experiments, the embryo-like structures grew more slowly and remained smaller than untreated controls, an effect observed even at the lowest concentration tested: 7 nanomoles per liter. This baseline concentration was selected because it corresponds to PFOS levels measured in the blood serum of pregnant women participating in the Swedish SELMA study (source ID: 1). [1]

The study conducted by researchers at Karolinska Institutet used stem cell-derived models to investigate the effects of PFOS on early human development (source ID: 1). This research focused on three highly persistent PFAS compounds, including PFOS, PFOA, and PFHxS, which are already regulated but remain prevalent in the environment. The study aimed to understand how these substances affect critical developmental processes during the early stages of embryonic and germ cell formation. [1]

The findings revealed that PFOS had the most pronounced effect among the three compounds studied. At baseline concentrations, which correspond to levels found in the blood of pregnant women, the activity of 746 genes was altered compared to the control group (source ID: 1). This gene expression change led to the repression of biological processes involved in development and cell signaling, indicating a significant disruption to early developmental mechanisms. [1]

The researchers noted that while the model used in the study captures key aspects of early post-implantation development, it does not fully replicate the complexity of a human embryo or the womb environment (source ID: 1). Therefore, further studies involving animal models and human epidemiological data are necessary to validate the long-term consequences of early prenatal exposure to PFAS, including the many family-related compounds that remain largely uncharacterized. [1]

Sources

Medical Xpress

Prepared with AI assistance from the cited sources.