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1.
Pharmacol Res ; 168: 105587, 2021 Mar 31.
Artigo em Inglês | MEDLINE | ID: mdl-33798737

RESUMO

We previously reported the neuroprotective effects of icariin in rat cortical neurons. Here, we present a study on icariin's anti-aging effect in 24-month aged mice by treating them with a single daily dose of 100 mg/kg of icariin for 15 consecutive days. Icariin treatment improved motor coordination and learning skills while lowered oxidative stress biomarkers in the serum, brain, kidney, and liver of the aged mice. In addition, icariin improved the intestinal integrity of the aged mice by upregulating tight junction adhesion molecules and the Paneth and goblet cells, along with the reduction of iNOS and pro-inflammatory cytokines (IL-1ß, TNF-α, IL-2 and IL-6, and IL-12). Icariin treatments also significantly upregulated aging-related signaling molecules, Sirt 1, 3 & 6, Pot1α, BUB1b, FOXO1, Ep300, ANXA3, Calb1, SNAP25, and BDNF in old mice. Through gut microbiota (GM) analysis, we observed icariin-associated improvements in GM composition of aged mice by reinstating bacteria found in the young mice, while suppressing some bacteria found in the untreated old mice. To clarify whether icariin's anti-aging effect is rooted in the GM, we performed fecal microbiota transfer (FMT) from icariin-treated old mice to the old mice. FMT-recipients exhibited similar improvements in the rotarod score and age-related biomarkers as observed in the icariin-treated old mice. Equal or better improvement on the youth-like features was noticed when aged mice were FMT with feces from young mice. Our study shows that both direct treatments with icariin and fecal transplant from the icariin-treated aged mice produce similar anti-aging phenotypes in the aged mice. We prove that GM plays a pivotal role in the healing abilities of icariin. Icariin has the potentials to be developed as a medicine for the wellness of the aged adults.

2.
Colloids Surf B Biointerfaces ; 203: 111756, 2021 Apr 08.
Artigo em Inglês | MEDLINE | ID: mdl-33865087

RESUMO

Ulcerative colitis (UC) is a chronic, idiopathic inflammatory bowel disease characterized by dysregulation of colon immune response. Curcumin (Cur) has strong anti-inflammatory activities, but the application is severely hindered by the extremely hydrophobicity and pitiful bioavailability. Alginate (Alg), a natural polysaccharide with ideal solubility and biosafety, was introduced to prepare the esterified alginate-curcumin conjugate (Alg-Cur) and constructed stable Alg-Cur micelle in physiological solutions. Compared with crystalline Cur, the target anti-inflammatory activities of Alg-Cur were systematically investigated. The results showed that Alg-Cur exerted effective anti-inflammatory effects in Raw 264.7 cells. After oral administration, 92.32 % of Alg-Cur reached colon, and the ester bonds were quickly sheared by abundant esterase produced by commensal anaerobic flora. The released Cur was quickly absorbed in-situ in monomolecular state, and effectively ameliorated the colonic inflammation and tissue damage by inhibiting the TLR4 expression in colonic epithelial cell, reducing the transcription and expression of the pro-inflammation cytokines downstream, as well as the infiltration of lymphocytes, macrophages and neutrophils. The Alg-Cur micelle effectively enhanced the hydrophilicity and bioavailability of Cur, and the commensal flora triggered Cur release showed great potential for UC treatment.

3.
Circulation ; 143(19): 1894-1911, 2021 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-33793303

RESUMO

BACKGROUND: Mutations in tafazzin (TAZ), a gene required for biogenesis of cardiolipin, the signature phospholipid of the inner mitochondrial membrane, causes Barth syndrome (BTHS). Cardiomyopathy and risk of sudden cardiac death are prominent features of BTHS, but the mechanisms by which impaired cardiolipin biogenesis causes cardiac muscle weakness and arrhythmia are poorly understood. METHODS: We performed in vivo electrophysiology to define arrhythmia vulnerability in cardiac-specific TAZ knockout mice. Using cardiomyocytes derived from human induced pluripotent stem cells and cardiac-specific TAZ knockout mice as model systems, we investigated the effect of TAZ inactivation on Ca2+ handling. Through genome editing and pharmacology, we defined a molecular link between TAZ mutation and abnormal Ca2+ handling and contractility. RESULTS: A subset of mice with cardiac-specific TAZ inactivation developed arrhythmias, including bidirectional ventricular tachycardia, atrial tachycardia, and complete atrioventricular block. Compared with wild-type controls, BTHS-induced pluripotent stem cell-derived cardiomyocytes had increased diastolic Ca2+ and decreased Ca2+ transient amplitude. BTHS-induced pluripotent stem cell-derived cardiomyocytes had higher levels of mitochondrial and cellular reactive oxygen species than wild-type controls, which activated CaMKII (Ca2+/calmodulin-dependent protein kinase II). Activated CaMKII phosphorylated the RYR2 (ryanodine receptor 2) on serine 2814, increasing Ca2+ leak through RYR2. Inhibition of this reactive oxygen species-CaMKII-RYR2 pathway through pharmacological inhibitors or genome editing normalized aberrant Ca2+ handling in BTHS-induced pluripotent stem cell-derived cardiomyocytes and improved their contractile function. Murine Taz knockout cardiomyocytes also exhibited elevated diastolic Ca2+ and decreased Ca2+ transient amplitude. These abnormalities were ameliorated by Ca2+/calmodulin-dependent protein kinase II or reactive oxygen species inhibition. CONCLUSIONS: This study identified a molecular pathway that links TAZ mutation with abnormal Ca2+ handling and decreased cardiomyocyte contractility. This pathway may offer therapeutic opportunities to treat BTHS and potentially other diseases with elevated mitochondrial reactive oxygen species production.

4.
Stem Cell Res ; 53: 102281, 2021 Mar 26.
Artigo em Inglês | MEDLINE | ID: mdl-33901818

RESUMO

Noonan Syndrome (NS) is an inherited autosome dominant disorder syndrome, which can be caused by the mutations of serine/threonine kinase rapidly accelerated fibrosarcoma 1 (RAF1) gene. Here, an induced pluripotent stem cell (iPSC) line named WMUi022-A derived from urine cells (UCs) of a 9-year-old male NS patient with the heterozygote RAF1 gene mutation p.S257L (c.770C > T) was established through the commercial Sendai virus reprogramming kit. The pluripotent markers like OCT4 and SOX2 can be expressed positively in WMUi022-A, which can be induced into three germ layers in vitro as well as maintain a normal karyotype (46, XY).

5.
Stem Cell Res ; 53: 102280, 2021 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-33735743

RESUMO

Gitelman Syndrome (GS) is an inherited autosome recessive disorder syndrome, which can be caused by the gene mutations of solute carrier family 12 member 3 gene (SLC12A3). In present study, the urine cells (UCs) of a 7-year-old male GS patient with the homozygote SLC12A3 gene mutation p.T60M (c.179C > T) were reprogrammed into induced pluripotent stem cells (iPSCs) named WMUi021-A through the commercial Sendai virus reprogramming kit. The pluripotent markers OCT4 and SOX2 can be expressed positively in WMUi021-A, which can be differentiated into three germ layers in vitro as well as maintain a stable karyotype (46, XY).

6.
Stem Cell Res ; 53: 102294, 2021 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-33765594

RESUMO

Lowe Syndrome (LS) is a rare X-linked multisystemic disorder syndrome, which can be caused by the gene mutations of OCRL. In present study, the urine cells (UCs) derived from a 12-year-old male LS patient with the hemizygote OCRL gene mutation p.M876N (c.2626dupA) were reprogrammed into induced pluripotent stem cells (iPSCs) named WMUi031-A through the commercial Sendai virus reprogramming kit. The pluripotent markers OCT4 and SOX2 can be expressed positively in WMUi031-A, which can be differentiated into three germ layers in vitro as well as maintain a stable karyotype (46, XY).

7.
Sheng Wu Gong Cheng Xue Bao ; 37(2): 696-704, 2021 Feb 25.
Artigo em Chinês | MEDLINE | ID: mdl-33645168

RESUMO

The training effects of experimental courses determine the practical abilities of undergraduate students. Therefore, it is essential to establish a comprehensive experimental course system that adapts to the undergraduate education of environmental science. Here, we introduce the "basic-specialized-comprehensive" experimental course system of Xiamen University, which is established following the principles of being systematic, comprehensive, and modular. To establish this course system, we first increased the investment of lab facilities and enhanced the management of student labs. Then, we improved the contexts of teaching and training according to the requirements of industry and society. Showing how this course system is developed stepwise and the training effects of this system, we hope to provide a reference for the experimental courses of environmental science in colleges and universities.


Assuntos
Ciência Ambiental , Universidades , Currículo , Humanos , Estudantes
8.
Stem Cell Res ; 51: 102209, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33545640

RESUMO

The gene mutations of the chloride channel gene (CLCN5) can lead to the inherited X-linked Dent disease (X-Dent). The urine cells of a 4-year-old male X-Dent patient with the hemizygous CLCN5 gene mutation p.R718* (c.2152C > T) were reprogrammed into induced pluripotent stem cells (iPSCs) using integration free Sendai virus reprogramming system. The generated iPSCs stably expressed pluripotent stem cell markers and can be induced to differentiate into three germ layers in vitro. The karyotype of the generated iPSCs was normal (46, XY).

9.
Stem Cell Res ; 52: 102228, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33607471

RESUMO

Bartter Syndrome (BS) is a group of rare inherited autosome-recessive disease, which can be caused by the gene mutations of sodium-potassium-chloride cotransporter gene (SLC12A1). Here, the urine cells (UCs) derived from a 4-year-old female BS patient with the homozygote SLC12A1 gene mutation p.A244D (c.731C>A) were reprogramming into induced pluripotent stem cells (iPSCs) named WMUi019-A using a commercial Sendai virus reprogramming kit. The pluripotent stem cell markers like OCT4 and SSEA4 can be positively expressed in this iPSC line, which can also be induced to differentiate into three germ layers in vitro and maintain a stable karyotype (46, XY).

10.
Stem Cell Res ; 52: 102261, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33631521

RESUMO

Antley-Bixler syndrome (ABS) is a rare inherited autosome recessive malformation syndrome, which can be caused by the gene mutations of cytochrome P450 oxidoreductase (POR). In this study, the urine cells (UCs) derived from a 5-year-old female ABS patient with the homozygote POR gene mutation p.R457H (c.1825C>G) were reprogramming into induced pluripotent stem cells (iPSCs) named WMUi018-A using a commercial Sendai virus reprogramming kit. The pluripotent markers of stem cells like OCT4 and SOX2 can be positively expressed in this iPSC line, which can be induced to differentiate into three germ layers in vitro and maintain a stable karyotype (46, XX).

11.
Ecotoxicol Environ Saf ; 210: 111854, 2021 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-33422839

RESUMO

OBJECTIVE: To explore the prospective correlation between serum metals before 24 weeks' gestation and gestational diabetes mellitus (GDM) or glucose in the late second trimester among southern Chinese pregnant women. METHODS: A total of 8169 pregnant women were included in our retrospective cohort study. Logistic regression was used to investigate the relationships between metals (Manganese [Mn], copper [Cu], lead [Pb], calcium [Ca], zinc [Zn], magnesium [Mg]) and GDM. Quantile regression was performed to detect the shifts and associations with metals and three time-points glucose distribution of oral glucose tolerance test (OGTT) focused on the 10th, 50th, and 90th percentiles. Weighted quantile sum (WQS) regression was used to explore the relationship of metal mixtures and GDM as well as glucose. RESULTS: Maternal serum concentrations of metals were assessed at mean 16.55 ± 2.92 weeks' gestation. Women with under weight might have 25% decreased risk of GDM for every 50% increase in Cu concentration within the safe limits. A 50% increase in Mn and Zn levels was related to a 0.051 µmol/L (95% CI: 0.033-0.070) and 0.059 µmol/L (95% CI: 0.040-0.079) increase in mean fasting plasma glucose of OGTT (OGTT0), respectively. The magnitude of association with Mn was smaller at the upper tail of OGTT0 distribution, while the magnitude of correlation with Zn was greater at the upper tail. However, there was a 0.012 mmol/L (95% CI: -0.017 to -0.008), 0.028 mmol/L (95% CI: -0.049 to -0.007), and 0.036 mmol/L (95% CI: -0.057 to -0.016) decrease in mean OGTT0 levels for every 50% increase in Pb, Ca, and Mg, respectively. The negative association of Pb, Ca, and Mg was greater at the lower tail of OGTT0 distribution. No significant relationship was observed in Cu and mean OGTT0 level (-0.010 mmol/L, 95% CI: -0.021 to 0.001), however, it showed a protective effect at the upper tail (-0.034 mmol/L, 95% CI: -0.049 to -0.017). No obvious correlation was found between metals and postprandial glucose levels (OGTT1 and OGTT2 from OGTT). The WQS index was significantly related to OGTT0 (P < 0.001). The contribution of Mn (80.19%) to metal mixture index was the highest related to OGTT0, followed by Cu (19.81%). CONCLUSIONS: Higher Mn and Zn but lower Pb, Ca, and Mg concentrations within a certain range before 24 weeks' gestation might prospectively impair fasting plasma glucose during pregnancy; a greater focus is required on Mn. It could provide early markers of metal for predicting later glucose and suggest implement intervention for pregnant women.


Assuntos
Glicemia/análise , Diabetes Gestacional/sangue , Metais/sangue , Adulto , Monitoramento Biológico , Biomarcadores/sangue , China/epidemiologia , Diabetes Gestacional/epidemiologia , Feminino , Humanos , Gravidez
12.
Stem Cell Res ; 51: 102170, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33472124

RESUMO

The gene mutations of the ATP-binding-cassette transporter subfamily D member 1 (ABCD1) can lead to the inherited neuro-metabolic malfunction disease X-linked adrenoleukodystrophy (X-ALD). Human urine cells from a 6-year-old male X-ALD patient harboring a ABCD1 gene frameshift (c.2013insA, Xq28) were reprogrammed into the induced pluripotent stem cell (iPSC) line WMUi014-A with Sendai virus reprogramming kit containing OCT4, SOX2, c-MYC, and KLF4 Yamanaka factors. The established iPSCs in vitro stably expressed pluripotent markers, had differentiation potential into three germ layers, and maintained a normal 44 + XY karyotype.

13.
Stem Cell Res ; 51: 102159, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33477035

RESUMO

The mutations of polyglutamine binding protein 1 gene (PQBP1) can lead to the rare inherited X-linked Renpenning syndrome (X-RSY). Here, an induced pluripotent stem cell (iPSC) line WMUi017-A was generated through reprogramming the urine cells of a 5-year-old male X-RSY patient with the hemizygous PQBP1 gene mutation p.P609A (c.1825C>G) using the commercial Sendai virus reprogramming system. The established iPSCs can stably express pluripotent stem cell markers OCT4 and NANOG, and can be induced into three germ layers and maintain a normal karyotype (46, XY) in vitro.

14.
Virulence ; 12(1): 360-376, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-33380272

RESUMO

Abnormalities in CD4+ T cell (Th cell) differentiation play an important role in the pathogenesis of viral myocarditis (VMC). Our previous studies demonstrated that activation of the cholinergic anti-inflammatory pathway (CAP) alleviated the inflammatory response. In addition, we observed that right cervical vagotomy aggravates VMC by inhibiting CAP. However, the vagus nerve's effect on differentiation of CD4+ T cells has not been studied in VMC mice to date. In this study, we investigated the effects of cervical vagotomy and the α7nAChR agonist pnu282987 on CD4+ T cell differentiation in a murine myocarditis model (BALB/c) infected with coxsackievirus B3 (CVB3). Splenic CD4+ T cells from CVB3-induced mice obtained and cultured to investigate the potential mechanism of CD4+ T cell differentiation. Each Th cell subset was analyzed by flow cytometry. Our results showed that right cervical vagotomy increased proportions of Th1 and Th17 cells and decreased proportions of Th2 and Treg cells in the spleen. Vagotomy-induced upregulation of T-bet, Ror-γ, IFN-γ, and IL-17 expression while downregulating the expression of Gata3, Foxp3, and IL-4 in the heart. In addition, we observed upregulated levels of proinflammatory cytokines, aggravated myocardial lesions and cellular infiltration, and worsened cardiac function in VMC mice. Pnu282987 administration reversed these outcomes. Furthermore, vagotomy inhibited JAK2-STAT3 activation and enhanced NF-κB activation in splenic CD4+ T cells. The CD4+ T cell differentiation was related to JAK2-STAT3 and NF-κB signal pathways. In conclusion, vagus nerve modulates the inflammatory response by regulating CD4+ T cell differentiation in response to VMC.

15.
Ann N Y Acad Sci ; 2020 Dec 10.
Artigo em Inglês | MEDLINE | ID: mdl-33305416

RESUMO

Many studies have shown that vitamin D (VD) deficiency may be a risk factor for neurodevelopmental disorders, such as autism spectrum disorders (ASDs) and schizophrenia, although causative mechanisms remain unknown. In this study, we investigated the potential role and effect of VD on maternal diabetes induced autism-related phenotypes. The in vitro study found that enhancing genomic VD signaling by overexpressing the VD receptor (VDR) in human neural progenitor cells ACS-5003 protects against hyperglycemia-induced oxidative stress and inflammation by activating Nrf2 and its target genes, including SOD2 and HMOX1, and accordingly, VDR gene knockdown worsens the problem. In the two in vivo models we explored, maternal diabetes was used to establish an animal model of relevance to ASD, and mice lacking 25-hydroxyvitamin D 1-alpha-hydroxylase (the rate-limiting enzyme in the synthesis of 1,25(OH)2D3) were used to develop a model of VD deficiency (VDD). We show that although prenatal VDD itself does not produce ASD-relevant phenotypes, it significantly potentiates maternal diabetes induced epigenetic modifications and autism-related phenotypes. Postnatal manipulation of VD has no effect on maternal diabetes induced autism-related phenotypes. We conclude that VDD potentiates maternal diabetes induced autism-related phenotypes in offspring by epigenetic mechanisms. This study adds to other preclinical studies linking prenatal VDD with a neurodevelopmental disorder.

16.
Cancer Cell Int ; 20(1): 542, 2020 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-33292231

RESUMO

BACKGROUD: ZBTB protein is an important member of the C2H2 zinc finger protein family. As a transcription factor, it is widely involved in the transcriptional regulation of genes, cell proliferation, differentiation, and apoptosis. The ZBTB7A has been largely linked to different kinds of tumors due to its diverse function. However, the value for ZBTB7A in uterine corpus endometrial carcinoma (UCEC) is unclear. METHODS: In our work, we assessed the importance of ZBTB7A in UCEC. Firstly, Using Oncomine and Tumor Immunoassay Resource (TIMER) databases to evaluate the expression of ZBTB7A. Secondly, we explored the co-expression network of ZBTB7A through the cBioPortal online tool, Metascape, and LinkedOmics. TIMER was also used to explore the relationship between ZBTB7A and tumor immune invasion, and to detect the correlation between the ZBTB7A and the marker genes related to immune infiltration. Finally, CCK8, migration, ChIP assays were introduced to partly validate ZBTB7A function in endometrial cancer cells. RESULTS: We found the ZBTB7A expression in TIMER was associated with various cancers, especially UCEC. The decreased expression of ZBTB7A was markedly related to the stage and prognosis of UCEC. Furthermore, ZBTB7A was also related to the expression of various immune markers such as Neutrophils, Dendritic cell, T cell (general), Th1, Th2, and Treg. Finally, we verified that ZBTB7A repressed E2F4 transcription and inhibited cells proliferation and migration. These results indicate that ZBTB7A may play a vital role in regulating immune cell infiltration in UCEC, and is a valuable prognostic marker. CONCLUSIONS: In summary, we demonstrate that ZBTB7A is notably downregulated in UCEC, plays a vital role in regulating immune cell infiltration, possesses diagnostic and prognostic values and attenuates E2F4 transcription and cell proliferation, migration in vitro.

17.
Stem Cell Res ; 49: 102085, 2020 Nov 08.
Artigo em Inglês | MEDLINE | ID: mdl-33202306

RESUMO

The gene mutations of the collagen type IV alpha 5 chain (COL4A5) can lead to the inherited haematuria to end-stage renal disease X-linked Alport syndrome (X-LAS). The urine cells of a 5-year-old male X-LAS patient carrying a hemizygous COL4A5 gene mutation p.G1433V (c.4298G>T) were reprogrammed to induced pluripotent stem cells (iPSCs) with Sendai virus reprogramming kit containing OCT4, SOX2, c-MYC, and KLF4 Yamanaka factors. The generated iPSC line WMUi015-A stably expressed pluripotent markers, maintained a normal karyotype (46, XY), and had differentiation potential into three germ layers in vitro.

18.
Stem Cell Res ; 49: 102064, 2020 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-33207306

RESUMO

Human induced pluripotent stem (iPS) cells expressing Cas9 protein are valuable for the pathogenic mechanism study and drug discovery. These cells can be efficiently induced to differentiate into disease cell models with specific mutations through adding designed sgRNAs. Here, we generated a human gene-editable iPS cell line by gene editing method that Cas9 gene driven by Tet-on operator was perfectly integrated into the human AAVS1 safe harbor locus. The established Cas9 expression iPS cell line named as WMUi013-A can express endogenous pluripotent markers, has the ability to differentiate into the three germ layers, and possesses a normal karyotype.

19.
Front Psychiatry ; 11: 576367, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33101089

RESUMO

Autism spectrum disorders (ASD) have been found to be associated with immune dysfunction and elevated cytokines, although the detailed mechanism remains unknown. In this study, we aim to investigate the potential mechanisms through a maternal diabetes-induced autistic mouse model. We found that maternal diabetes-induced autistic offspring have epigenetic changes on the superoxide dismutase 2 (SOD2) promoter with subsequent SOD2 suppression in both hematopoietic stem cells (HSC) and peripheral blood mononuclear cells (PBMC). Bone marrow transplantation of normal HSC to maternal diabetes-induced autistic offspring transferred epigenetic modifications to PBMC and significantly reversed SOD2 suppression and oxidative stress and elevated inflammatory cytokine levels. Further, in vivo human study showed that SOD2 mRNA expression from PBMC in the ASD group was reduced to ~12% compared to typically developing group, and the SOD2 mRNA level-based ROC (Receiver Operating Characteristic) curve shows a very high sensitivity and specificity for ASD patients. We conclude that maternal diabetes induces immune dysfunction in autistic offspring through SOD2 suppression and oxidative stress in HSC. SOD2 mRNA expression in PBMC may be a good biomarker for ASD diagnosis.

20.
Comput Intell Neurosci ; 2020: 8834699, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33061948

RESUMO

Air pollutant concentration forecasting is an effective way which protects health of the public by the warning of the harmful air contaminants. In this study, a hybrid prediction model has been established by using information gain, wavelet decomposition transform technique, and LSTM neural network, and applied to the daily concentration prediction of atmospheric pollutants (PM2.5, PM10, SO2, NO2, O3, and CO) in Beijing. First, the collected raw data are selected by feature selection by information gain, and a set of factors having a strong correlation with the prediction is obtained. Then, the historical time series of the daily air pollutant concentration is decomposed into different frequencies by using a wavelet decomposition transform and recombined into a high-dimensional training data set. Finally, the LSTM prediction model is trained with high-dimensional data sets, and the parameters are adjusted by repeated tests to obtain the optimal prediction model. The data used in this study were derived from six air pollution concentration data in Beijing from 1/1/2014 to 31/12/2016, and the atmospheric pollutant concentration data of Beijing between 1/1/2017 and 31/12/2017 were used to test the predictive ability of the data set test model. The results show that the evaluation index MAPE of the model prediction is 7.45%. Therefore, the hybrid prediction model has a higher value of application for atmospheric pollutant concentration prediction, because this model has higher prediction accuracy and stability for future air pollutant concentration prediction.

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