Oxidized low-density lipoprotein induces M2-type differentiation of macrophages to promote the protracted progression of atherosclerotic inflammation in high-fat diet-fed ApoE -/- mice.

In this study, the significance of oxidized low-density lipoprotein (ox-LDL) in promoting the progression of atherosclerosis was investigated by inducing the differentiation of macrophages into the M2 subtype within a high-fat diet-induced ApoE -/- mouse model. The study also evaluated the effects of ß2-AR agonists and blockers on this process. Ox-LDL was found to have significantly promoted the differentiation of macrophages into the M2 type and induced related functional alterations. Furthermore, it activated the pyroptosis pathway and encouraged the release of lactate dehydrogenase. The administration of ß2-AR agonists intensified these processes, while ß2-AR blockers had the opposite effect. In animal experiments, the model group displayed elevated numbers of M2-type macrophages beneath the aortic root intima, an increased rate of plaque destruction, and the formation of atherosclerotic plaques compared to the control group. The SAL (Salbutamol) group exhibited even more severe plaque development than the model group. Conversely, the ICI (ICI118551) group demonstrated M2-type macrophage levels comparable to the control group, with a higher plaque destruction rate than controls but significantly lower than the model group, and no atherosclerotic plaques. These findings suggest that ox-LDL promoted the differentiation of recruited monocytes into M2-type macrophages, leading to a shift in the inflammatory response from M1 to M2 macrophages. This alteration resulted in the persistence of atherosclerotic inflammation, as M2-type macrophages were prone to cell membrane rupture (such as pyroptosis), contributing to the continuous recruitment of circulating monocytes and heightened inflammatory reactions within atherosclerotic plaques. Consequently, this process fueled the progression of atherosclerosis.

The balance between CD4+ T helper 17 and T-cell immunoglobulin and mucin domain 3 is involved in the pathogenesis and development of atrial fibrillation.

Background: To investigate the expression of Th17, T lymphocyte immunoglobulin mucin 3 (TIM-3+) cells and their related cytokines in atrial fibrillation (AF) and their clinical significance. Methodology: A total of 90 patients with AF were divided into paroxysmal group (n=45) and chronic group (n=45), and 45 healthy volunteers were selected as the control group. The proportion of Th17 cells and Tim-3 + cells in the peripheral blood were detected. The concentrations of related cytokines in peripheral blood serum were determined. The correlation between Th17 / Tim-3+ cells and related cytokines was analysed. Results: Compared with the control group, the proportion of Th17 cells and the concentration of related cytokines (IL-17, IL-6 and Matrix metalloproteinase (MMP9)) in peripheral blood of patients with paroxysmal and chronic AF increased significantly, while the proportion of tim3 + cells and the concentration of related cytokines decreased significantly. Compared with the paroxysmal group, the proportion of Th17 cells and the concentration of related cytokines in the peripheral blood of patients in the chronic group increased significantly, while the proportion of tim3 + cells and the concentration of related cytokines decreased significantly. Conclusion: Th17 / Tim-3 + cell balance is involved in AF, and can be used as a target for AF treatment.

Generation of a human induced pluripotent stem cell line (SIAISi010-A) from a 31-year-old healthy donor with Chinese Han genetic background.

A healthy 31-year-old Chinese Han female donated peripheral blood mononuclear cells (PBMC). Her PBMCs were reprogrammed with human OKSM (OCT3/4, KLF4 SOX2, and c-MYC) transcription factors by the non-integrating episomal vector system. Immunocytochemistry for pluripotency markers confirmed the pluripotency of transgene-free iPSCs. Their ability to differentiate spontaneously three germ layers in vitro is also confirmed. The iPSC line displayed a normal karyotype. This model can be used as a control in pathological mechanism studies.

Generation of a human-derived induced pluripotent stem cell line (SIAISi012-A) from an 82-year-old healthy Chinese Han male.

As the global median population age increases, neurological diseases associated with aging pose significant challenges to human health. Appropriate modeling systems can be useful tools to better understand the mechanism of age-related neuronal degeneration diseases. Here, we successfully generated an iPSC-derived modeling system of an 82-year-old healthy man, this newly established line showed that all pluripotent markers were expressed, and the differentiation potential was confirmed by trilineage differentiation. STR profiling proved the cell line identity, and G-binding showed the normal karyotype.

Generation of an induced pluripotent stem cell line (SIAISi009-A) from a 60-year-old Chinese Han female with mild cognitive impairment (MCI) having two copies of APOE4/4 allele.

Induced pluripotent stem cells play vitally essential roles in regenerative medicines for disease modeling and drug screening. Here, we successfully generated an iPSC line from PBMC of a 60-year-old female with mild cognitive impairment in an APOE 4/4 background to better understand studies relating to MCI and other cognitive diseases. In the newly-developed hiPSC line SIAISi009-A, all pluripotent markers were well expressed. Moreover, cells displayed a normal karyotype and have differentiation potential proven by in vitro trilineage differentiation method.

Generation of three iPSC cell lines (SIAISi006-A, SIAISi007-A and SIAISi008-A) from a 66-year-old Alzheimer's disease (AD) patient and her two unaffected children from Chinese Han population.

A 66-year-old Chinese Han Alzheimer's Disease (AD) female patient and her two unaffected children donated their Peripheral blood mononuclear cells (PBMC). Non-integrating episomal vector system were used to reprogram their PBMCs with human OKSM (OCT3/4, KLF4, SOX2, and c-MYC) transcription factors. Immunocytochemistry for pluripotency makers confirmed the pluripotency of transgene-free iPSCs. Pluripotency was confirmed by the ability of iPSCs to spontaneously differentiate three germ layers in vitro as well. The iPSC line displayed a normal karyotype. This model provides insight into further pathological studies to research identify early biomarkers, study disease pedigrees, and also for drug testing purposes.

Generation of a human induced pluripotent stem cell line (SIAISi011-A) from a 61-year-old Chinese Han healthy female donor.

Peripheral blood mononuclear cells (PBMC) were donated by a healthy 61-year old Chinese Han female. Human OKSM (OCT3/4, KLF4 SOX2, and c-MYC) transcription factors were used to reprogram her PBMCs with the non-integrating episomal vector system. Immunocytochemistry for pluripotency makers confirmed the pluripotency of transgene-free iPSCs and their ability to differentiate spontaneously three germ layers in vitro. The iPSC line displayed a normal karyotype. Our model offers the possibility to be used a control in pathological mechanism studies.

Generation of an induced pluripotent stem cell line (SIAISi003-A) from a 79-year-old patient with Alzheimer's disease having APOE3/4 genetic background.

The genotype of apolipoprotein E (APOE) is closely associated with susceptibility to Alzheimer's disease. Here, we described the generation and characterization of human induced pluripotent stem cells from peripheral blood mononuclear cells (PBMCs) of a 79-year-old female patient with Alzheimer's disease having APOE3/4 genotype. The generated iPSCs expressed pluripotent stem cell markers that were observed using immunocytochemistry. Moreover, they displayed a normal karyotype and had the potential to differentiate spontaneously into three germ layers in vitro. Our model could provide valuable insights into pathological mechanisms, and offer a unique opportunity for developing drugs against specific phenotypes for Alzheimer's disease therapy.