Do all algae grow faster in environments replenished by reclaimed water? Examples of two effluents produced in Beijing.

Reclaimed water with nitrogen, phosphorus, and other contaminants may trigger algal blooms during its ecological utilization in replenishing rivers or lakes. However, the effect of reclaimed water on algal growth rates is not well understood. In this study, the growth potentials of algae in terms of Cyanophyta, Chlorophyta, and Bacillariophyta, as well as mixed algae in both regular culture medium and reclaimed water produced from treatment plants in Beijing with similar N and P concentrations, were compared to evaluate whether reclaimed water could facilitate algal growth. In addition, reclaimed water was also sterilized to verify the impact of bacteria's presence on algal growth. The results indicated that most algae grew faster in reclaimed water, among which the growth rate of Microcystis aeruginosa even increased by 5.5 fold. The growth of mixed algae in reclaimed water was not enhanced due to the strong adaptive ability of the community structure. Residual bacteria in the reclaimed water were found to be important contributors to algal growth. This work provided theoretical support for the safe and efficient utilization of reclaimed water.

[Distribution of memory B cell subsets in peripheral blood of children with frequently relapsing nephrotic syndrome]. / é¢‘å¤å‘è‚¾ç— ç»¼åˆå¾æ‚£å„¿å¤–å‘¨è¡€è®°å¿†B细胞亚群分布变化.

OBJECTIVES: To investigate the change in the distribution of memory B cell subsets in children with frequently relapsing nephrotic syndrome (FRNS) during the course of the disease. METHODS: A total of 35 children with primary nephrotic syndrome (PNS) who attended the Department of Pediatrics of the Affiliated Hospital of Xuzhou Medical University from October 2020 to October 2021 were enrolled as subjects in this prospective study. According to the response to glucocorticoid (GC) therapy and frequency of recurrence, the children were divided into two groups: FRNS (n=20) and non-FRNS (NFRNS; n=15). Fifteen children who underwent physical examination were enrolled as the control group. The change in memory B cells after GC therapy was compared between groups, and its correlation with clinical indicators was analyzed. RESULTS: Before treatment, the FRNS and NFRNS groups had significantly increased percentages of total B cells, total memory B cells, IgD+ memory B cells, and IgE+ memory B cells compared with the control group, and the FRNS group had significantly greater increases than the NFRNS group (P<0.05); the FRNS group had a significantly lower percentage of class-switched memory B cells than the NFRNS and control groups (P<0.05). After treatment, the FRNS and NFRNS groups had significant reductions in the percentages of total B cells, total memory B cells, IgM+IgD+ memory B cells, IgM+ memory B cells, IgE+ memory B cells, IgD+ memory B cells, and IgG+ memory B cells (P<0.05) and a significant increase in the percentage of class-switched memory B cells (P<0.05). The FRNS group had a significantly higher urinary protein quantification than the NFRNS and control groups (P<0.05) and a significantly lower level of albumin than the control group (P<0.05). In the FRNS group, urinary protein quantification was negatively correlated with the percentage of class-switched memory B cells and was positively correlated with the percentage of IgE+ memory B cells (P<0.05). CONCLUSIONS: Abnormal distribution of memory B cell subsets may be observed in children with FRNS, and the percentages of IgE+ memory B cells and class-switched memory B cells can be used as positive and negative correlation factors for predicting recurrence after GC therapy in these children.

Application status of tissue engineering in cardiovascular diseases / 解放军医学杂志

With the continuously increasing of the elderly population, cardiovascular diseases have gradually become the main cause of death of the elderly. Traditional treatments can only temporarily relieve the clinical symptoms of patients, but can't solve the problem fundamentally. The emergence of tissue engineering technology provides a new approach for treating cardiovascular diseases, which is to plant the cells on biodegradable scaffold materials and, in turn, play a role of extracellular matrix. The present paper will describe the application of tissue engineering technology in myocardium, heart valve and blood vessels to understand the role of tissue engineering technology in cardiovascular diseases, and provide new ideas and treatments for the treatment of cardiovascular diseases.

Prolonged warm ischemia aggravates hepatic mitochondria damage and apoptosis in DCD liver by regulating Ca2+/CaM/CaMKII signaling pathway.

This study was conducted to investigate the effect of warm ischemia duration on hepatocyte mitochondrial damage after liver transplantation, and confirm the role of CaMKIIγ in this process. Rat donation after cardiac death (DCD) liver transplantation model was established by exposing donor liver to 0 (W0 group), 15 (W15 group), and 30 (W30 group) min warm ischemia. Some rats in W15 group were transfected with CaMKIIγ and CaMKIIγ-shRNA lentivirus. On day 1, 3, and 7 post-transplantation, a series of experiments, including HE staining, TEM observation, ALT and AST measurement, flow cytometry analysis, qRT-PCR, and Western blotting were performed to evaluate the extent of hepatic and mitochondria damage. Within 7 days post-transplantation, prolonged ischemia led to an obvious deterioration of hepatic and mitochondria damage, presenting with a marked increase of apoptotic hepatocytes, ALT and AST levels, cells with low MMP, and AIF and Cyt C expression. CaMKIIγ overexpression caused the significant ultrastructural damage of hepatic cells, increase of cells with low MMP, enhancement of AIF and Cyt C expression, and augmented Ca2+/CaM/CaMKIIγ, while blocking CaMKIIγ showed an opposite result. In conclusion, ischemia duration is proportional to the extent of hepatic mitochondria damage, and CaMKIIγ plays a negative regulatory role in this process by regulating the Ca2+/CaM/CaMKII signaling pathway.

Proteomics and Its Application in Forensic Pathology / 法医学杂志

Proteomics has become one of the hot topics in modern life sciences. Its application prospects have been confirmed in clinical medical research, such as the discovery of new disease biomarkers, identification of disease-related proteins, and development of new drug targets. However, in the field of forensic science, especially in forensic pathology, it is still in the stage of exploration. This paper reviews the research techniques and the use of proteomics in forensic pathology in domestic and foreign scholars, in order to provide new ideas for the research and application of forensic pathology.

[Relationship between daily mean temperature and emergency department visits for respiratory diseases: a time-series analysis].

OBJECTIVE: To quantitatively evaluate the influences of daily mean air temperature (DMT) on Emergency Department Visits (EDVs) for the respiratory diseases. METHODS: The EDV data from medical records for respiratory diseases in Peking University Third Hospital between January 2004 and June 2009 were collected. The data of the air pollutants (SO(2), NO(2) and PM(10)) and meteorological factors at the same time periods were also collected from the local authorities of Beijing. Time-series analysis and generalized additive models (GAM) were used to explore the exposurrre-response relationship between DMT and EDVs for respiratory diseases. RESULTS: A total of 35 073 patients [males 14 707(41.93%,14 707/35 073), females 19 122(54.52%,19 122/35 073) and gender missing 1 244(3.55%, 1 244/35 073)] EDVs for respiratory diseases were included. The relationship between DMT and EDVs for the respiratory diseases was mainly of "V" shape, the optimum temperature(OT) was about 4 °C and the effect of DMT was significant with a 0-3 day lag structure for most of the models. When DMT≤OT, each 1°C decrease in DMT corresponded to 3.75% (95% CI of RR: 0.938 3-0.965 3), 3.10% (95% CI of RR:0.949 2-0.989 1), 4.09% (95% CI of RR:0.940 7-0.977 8) increase of EDVs for the overall, male, and female, respectively. When DMT>OT, the value caused by each increase in 1°C in DMT was 1.54% (95% CI of RR:1.006 6-1.024 3), 1.80% (95% CI of RR:1.005 3-1.030 9), and 1.51 (95% CI of RR:1.003 2- 1.027 2), respectively. The effect was statistically significant within the 0-3 day lag. When DMT≤OT, the effect was stronger for the older people, while the effect was strongest for the 45-59 years old people. CONCLUSION: The relationship between DMT and EDVs for respiratory diseases is mainly of "V" type, with an optimum temperature of 4 °C.Both DMT decrease when DMT≤OT and increase when DMT>OT correspond to different increase of EDVs for respiratory diseases. Low DMT has stronger effect than high DMT. Different age group and gender have different effects.