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Xu GM, Wang M, Bao HL, Fang PF, Zeng YH, Du L, Wang XL. Design of Ni(OH)2/M-MMT Nanocomposite With Higher Charge Transport as a High Capacity Supercapacitor. Front Chem 2022; 10:916860. [PMID: 35711949 PMCID: PMC9197183 DOI: 10.3389/fchem.2022.916860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
Nano-petal nickel hydroxide was prepared on multilayered modified montmorillonite (M-MMT) using one-step hydrothermal method for the first time. This nano-petal multilayered nanostructure dominated the ion diffusion path to be shorted and the higher charge transport ability, which caused the higher specific capacitance. The results showed that in the three-electrode system, the specific capacitance of the nanocomposite with 4% M-MMT reached 1068 F/g at 1 A/g and the capacity retention rate was 70.2% after 1,000 cycles at 10 A/g, which was much higher than that of pure Ni(OH)2 (824 F/g at 1 A/g), indicating that the Ni(OH)2/M-MMT nanocomposite would be a new type of environmentally friendly energy storage supercapacitor.
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Xu C, Du L, Chen F, Tang K, Tang L, Shi J, Xiao L, Zeng Z, Liang Y, Guo Y. Increased expression of IL1-RL1 is associated with type 2 and type 1 immune pathways in asthma. BMC Immunol 2022; 23:23. [PMID: 35578178 PMCID: PMC9112580 DOI: 10.1186/s12865-022-00499-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 05/10/2022] [Indexed: 11/10/2022] Open
Abstract
Background Asthma is a common chronic airway disease in the world. The purpose of this study was to explore the expression of IL1-RL1 in sputum and its correlation with Th1 and Th2 cytokines in asthma. Methods We recruited 132 subjects, detected IL1-RL1 protein level in sputum supernatant by ELISA, and analyzed the correlation between the expression level of IL1-RL1 and fraction of exhaled nitric oxide (FeNO), IgE, peripheral blood eosinophil count (EOS#), and Th2 cytokines (IL-4, IL-5, IL-10, IL-13, IL-33 and TSLP) and Th1 cytokines (IFN-γ, IL-2, IL-8). The diagnostic value of IL1-RL1 was evaluated by ROC curve. The expression of IL1-RL1 was further confirmed by BEAS-2B cell in vitro. Results Compared with the healthy control group, the expression of IL1-RL1 in sputum supernatant, sputum cells and serum of patients with asthma increased. The AUC of ROC curve of IL1-RL1 in sputum supernatant and serum were 0.6840 (p = 0.0034), and 0.7009 (p = 0.0233), respectively. IL1-RL1 was positively correlated with FeNO, IgE, EOS#, Th2 cytokines (IL-4, IL-5, IL-10, IL-13, IL-33 and TSLP) and Th1 cytokines (IFN-γ, IL-2, IL-8) in induced sputum supernatant. Four weeks after inhaled glucocorticoids (ICS) treatment, the expression of IL1-RL1 in sputum supernatant and serum was increased. In vitro, the expression of IL1-RL1 in BEAS-2B was increased after stimulated by IL-4 or IL-13 for 24 h. Conclusion The expression of IL1-RL1 in sputum supernatant, sputum cells and serum of patients with asthma was increased, and was positively correlated with some inflammatory markers in patients with asthma. IL1-RL1 may be used as a potential biomarker for the diagnosis and treatment of asthma. Supplementary Information The online version contains supplementary material available at 10.1186/s12865-022-00499-z.
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Chen F, Liang Y, Zeng Z, Du L, Xu C, Guo Y, Xie C. Association of increased basic salivary proline-rich protein 1 levels in induced sputum with type 2-high asthma. Immun Inflamm Dis 2022; 10:e602. [PMID: 35344278 PMCID: PMC8959441 DOI: 10.1002/iid3.602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 02/07/2022] [Accepted: 02/09/2022] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND The aim of this study is to reveal whether basic salivary proline-rich protein BstNI subfamily 1 (PRB1) may be used as a diagnostic biomarker for type 2-high asthma. METHODS PRB1 protein levels in the induced sputum of 67 subjects with asthma and 27 controls were determined by an enzyme-linked immunosorbent assay. Correlation analyses between PRB1 in the induced sputum and airway inflammatory indicators were also performed. RESULTS PRB1 protein levels were significantly upregulated in the induced sputum of asthmatic patients (p =0.0098) and correlated with clinical eosinophil-related indicators and type 2 airway inflammation. These results indicate that PRB1 is a promising biomarker for type 2-high asthma. CONCLUSIONS The expression of PRB1 in induced sputum is a potential biomarker for type 2-high asthma. The results of this study present new insights into the diagnosis and treatment of asthma.
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Zhang X, Hong F, Liu L, Nie F, Du L, Guan H, Wang Z, Zeng Q, Yang J, Wang J, Li X, Zhang J, Luo P. Lipid accumulation product is a reliable indicator for identifying metabolic syndrome: the China Multi-Ethnic Cohort (CMEC) Study. QJM 2022; 115:140-147. [PMID: 33367838 DOI: 10.1093/qjmed/hcaa325] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/13/2020] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Previous studies have shown that lipid accumulation product (LAP) was associated with the risk of cardiometabolic disease. It is not clear whether LAP could be used as a marker to identify metabolic syndrome (MetS) among Chinese ethnic groups. AIM To assess the reliability of LAP as a maker to identify MetS among Dong adults. DESIGN Population-based cross-sectional study. METHOD We included 6494 Dong individuals (1403 patients) aged 30-79 years from southwest China. MetS was established by Chinese Diabetes Society. Logistic regression model was utilized to calculate odds ratios (ORs) and 95% confidence intervals (CIs). Receiver operating characteristic (ROC) curve was utilized to calculate area under the ROC curve (AUC) and 95% CIs to obtain the identification ability for MetS. RESULTS The risk of MetS was increased with per 5 units increase of LAP (OR 1.37 [95% CI, 1.34-1.39]). Similar results were found in subgroup analyses and sensitivity analyses. Clustered metabolic risk associated with per 5 units increase of LAP was observed for people with 1 (OR 1.59 [95% CI, 1.53-1.65]), 2 (2.15 [2.06-2.24]), 3 (2.59 [2.48-2.71]), 4 (2.81 [2.69-2.95]) and 5 (3.03 [2.87-3.21]) MetS components. LAP presented higher AUC (0.915 [95% CI, 0.907-0.923]) than other included obesity indices (P < 0.05). CONCLUSION These data support evidence that LAP was related to the risk of MetS, had a high AUC and could be a reliable index for identifying MetS patients among Dong adults in Chinese.
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Du L, Xu C, Zeng Z, Chen F, Tang K, Liang Y, Guo Y. Exploration of induced sputum BIRC3 levels and clinical implications in asthma. BMC Pulm Med 2022; 22:86. [PMID: 35287655 PMCID: PMC8922789 DOI: 10.1186/s12890-022-01887-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/10/2022] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Baculoviral IAP repeat-containing 3 (BIRC3) which encodes a member of the IAP family of proteins upregulated in the asthma expression profile dataset. However, there was few research on studying the clinical implication of BIRC3 in asthma. OBJECTIVE To validate BIRC3 expression and its clinical implications in induced sputum of asthma. METHODS Based on the GSE76262 (118 asthma cases and 21 healthy controls) dataset, differentially expressed genes were screened using R software. Subsequently, BIRC3 mRNA and protein were clinically verified in induced sputum samples through quantitative real-time polymerase chain reaction (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA). Besides, the correlations between BIRC3 expression and asthmatic eosinophilic/allergic inflammation indicators (FeNO, IgE, and EOS%), pulmonary function (FEV1, FEV1% pred, FVC% pred, and FEV1/FVC), and inflammatory cytokines (IL-4, IL-5, IL-13, IL-25, IL-10, IL-33, and TSLP) were analyzed. Finally, BIRC3 mRNA was detected in human primary bronchial epithelial cells stimulated by cytokines (IL-4 or IL-13). RESULTS BIRC3 was screened as a candidate gene in the GSE76262, which was highly expressed in asthma. Highly expressed BIRC3 was positively correlated with eosinophilic and allergic indicators, including FeNO, blood eosinophil, and serum IgE. Moreover, BIRC3 protein was positively associated with inflammation cytokines, like IL-4, IL-5, IL-13, IL-25, IL-10, IL-33, and TSLP, while negatively correlated with FEV1, FEV1%pred, FVC% pred, and FEV1/FVC. Furthermore, the expression of BIRC3 could be induced in primary bronchial epithelial cells treated by cytokines IL-4 or IL-13. CONCLUSIONS BIRC3 significantly increased in induced sputum of asthma and positively correlated with airway eosinophilic and peripheral blood allergic inflammation, type 2 cytokines, and airway obstruction. Increased BIRC3 might be involved in the pathogenesis of asthma by affecting the eosinophilic and allergic inflammation.
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Rehman AU, Fayaz M, Lv H, Liu Y, Zhang J, Wang Y, Du L, Wang R, Shi K. Controllable Synthesis of a Porous PEI-Functionalized Co 3O 4/rGO Nanocomposite as an Electrochemical Sensor for Simultaneous as Well as Individual Detection of Heavy Metal Ions. ACS OMEGA 2022; 7:5870-5882. [PMID: 35224348 PMCID: PMC8867791 DOI: 10.1021/acsomega.1c05989] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
The present study focuses on the strategy of employing an electrochemical sensor with a porous polyethylenimine (PEI)-functionalized Co3O4/reduced graphene oxide (rGO) nanocomposite (NCP) to detect heavy metal ions (HMIs: Cd2+, Pb2+, Cu2+, and Hg2+). The porous PEI-functionalized Co3O4/rGO NCP (rGO·Co3O4·PEI) was prepared via a hydrothermal method. The synthesized NCP was based on a conducting polymer PEI, rGO, nanoribbons of Co3O4, and highly dispersed Co3O4 nanoparticles (NPs), which have shown excellent performance in the detection of HMIs. The as-prepared PEI-functionalized rGO·Co3O4·PEI NCP-modified electrode was used for the sensing/detection of HMIs by means of both square wave anodic stripping voltammetry (SWV) and differential normal pulse voltammetry (DNPV) methods for the first time. Both methods were employed for the simultaneous detection of HMIs, whereas SWV was employed for the individual analysis as well. The limits of detection (LOD; 3σ method) for Cd2+, Pb2+, Cu2+, and Hg2+ determined using the rGO·Co3O4·PEI NCP-modified electrode were 0.285, 1.132, 1.194, and 1.293 nM for SWV, respectively. Similarly, LODs of Cd2+, Pb2+, Cu2+, and Hg2+ were 1.069, 0.285, 2.398, and 1.115 nM, respectively, by DNPV during simultaneous analysis, whereas they were 0.484, 0.878, 0.462, and 0.477 nM, respectively, by SWV in individual analysis.
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Albino L, Rosentreter R, Lu C, Siffledeen J, Dieleman LA, Ma C, Baugmart DC, Du L, Halloran B, Kroeker K, Peerani F, Wong K. A146 THE EFFECTIVENESS OF USTEKINUMAB DOSE ESCALATION IN PATIENTS WITH ULCERATIVE COLITIS. J Can Assoc Gastroenterol 2022. [PMCID: PMC8859317 DOI: 10.1093/jcag/gwab049.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Ustekinumab (UST), an IgG1 antibody that targets IL-12/23, is an effective and safe treatment option for patients with inflammatory bowel disease (IBD). Cohort studies have shown that dose escalation is an effective strategy for reinducing and maintaining remission in Crohn’s disease patients who do not respond or lose response to standard dosing of UST. There are currently no published studies evaluating effectiveness of UST dose escalation in ulcerative colitis (UC) patients. Aims To assess the effectiveness of UST dose escalation in patients with moderate-to-severe UC who have not responded to or lost responsiveness to standard maintenance dosing (90mg SC every 8 weeks). Methods A retrospective cohort study was conducted at three centers. Consecutive patients with moderate-to-severe UC initiated on ustekinumab were enrolled. Results Data on 43 patients (26 males) are reported (to date, patients from 1 of 3 centres have been reviewed). Mean age was 40.2 years (±15.6). Mean duration of disease was 8.5 years (±5.8). Mean duration of follow up while on UST was 8.8 months (±7.2). In total, 28% (12) of patients underwent dose escalation: 8% (1) by way of IV reinduction, 58% (7) through interval shortening (every 4 weeks), and 33% (4) by both interval shortening and IV reinduction. Mean time to first dose escalation was 6.2 months (±4.1). Mean time to second dose escalation was 5.1 months (±1.2). Seven percent (3) of patients discontinued UST, with the mean timeframe being 5.3 months (±2.9). Three patients discontinued UST due to primary non-response with one proceeding onto surgery. Time to normalization of CRP and FCP after initiation of UST is shown in Table 1. Conclusions Preliminary data demonstrates that 28% of patients in this cohort required UST dose escalation, with 33% requiring a second dose escalation. Only 7% of patients discontinued UST at 9 months of follow up. Longer term follow up of this cohort would determine if dose escalation is an effective strategy to extend durability of ustekinumab. Table 1. Normalization of CRP and FCP Funding Agencies None
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Xu C, Du L, Zeng Z, Chen F, Liang Y, Guo Y. Elevated CEACAM5 Levels in Patients with Asthma. Int Arch Allergy Immunol 2022; 183:673-681. [PMID: 35172310 DOI: 10.1159/000521754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 12/27/2021] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Asthma is a common chronic respiratory disease. This study aimed to explore the expression level of carcinoembryonic antigen-related cell adhesion molecule 5 (CEACAM5) in induced sputum supernatant, induced sputum cells, and serum of asthma patients. METHODS The protein levels of CEACAM5 in induced sputum supernatant and serum were detected by enzyme-linked immunosorbent assay. The expression of CEACAM5 in induced sputum cells was detected by quantitative reverse transcription polymerase chain reaction (qRT-PCR). We analyzed the correlations between CEACAM5 expression and the clinical characteristics (FeNO and IgE) of asthma. The receiver operating characteristic (ROC) curve was used to analyze the diagnostic value of CEACAM5 in asthma. The expression level of CEACAM5 in 16HBE and BEAS-2B cells was detected by qRT-PCR. RESULTS The expression of CEACAM5 in induced sputum supernatant, induced sputum cells, and serum of asthma patients was significantly upregulated. Asthma patients with high CEACAM5 expression in induced sputum supernatant had higher levels of FeNO, IgE, and IL-13. The expression levels of CEACAM5 in induced sputum supernatant and induced sputum cells were positively correlated with FeNO and IgE. The ROC curve showed that CEACAM5 had a good diagnostic value in asthma. CEACAM5 expression was upregulated in BEAS-2B and 16HBE cells after IL-4 or IL-13 stimulation for 48 h. CONCLUSION The expression levels of CEACAM5 in induced sputum supernatant, induced sputum cells, and serum of asthma patients were significantly increased. CEACAM5 may be involved in eosinophilic inflammation of asthma and may be used as a diagnostic biomarker and therapeutic target of asthma.
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Liu J, Liu Y, Wang J, Ge S, Zhang Y, Wang X, Du L, He H. Permanent Maxillary Odontometrics for Sex Estimation Based on a 3-Dimensional Digital Method. Med Sci Monit 2021; 27:e933450. [PMID: 34934039 PMCID: PMC8711212 DOI: 10.12659/msm.933450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Background In the field of forensic medicine, sex estimation is a critical step in personal identification. Teeth are the hardest tissue and have high temperature resistance and corrosion resistance. In cases such as an airplane crash or the corpse of an unknown person, teeth often play a crucial role in identification. This study applied 3-dimensional technology to obtain odontometrics of permanent maxillary teeth and to examine the sexual dimorphism, finding suitable discriminant indicators to construct appropriate equations for sex estimation. Material/Methods A total of 204 participants (104 men and 100 women) from the Han population in Kashgar were included. Plaster models of their maxillary dentition were obtained to scan and measure through an accepted and commonly used 3-dimensional digital method. Descriptive statistics, t tests, and discriminant analyses were statistically analyzed using IBM SPSS 23.0 software. Results This study showed high intra- and interexaminer reliability (intraclass correlation coefficient >0.950). There were statistically significant sex-related differences (P<0.05), with male values generally being higher for buccolingual distance, mesiodistal distance, intercanine distance, crown area, crown module, crown index, and maxillary canine index. Compared with other measurements, mesiodistal distance and crown area indicator exhibited distinct sexual dimorphism. In addition, several appropriate equations were constructed through different discriminant analyses that could be used to estimate sex in our specific population. Conclusions Three-dimensional digital technology offers a promising method for odontometry. Combining mesiodistal distance and buccolingual distance of particular teeth or using maxillary canine index in discriminant functions are acceptable auxiliary tools for sex estimation in the forensic field.
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Jin F, Li T, Yuan T, Du L, Lai C, Wu Q, Zhao Y, Sun F, Gu L, Wang T, Feng ZQ. Physiologically Self-Regulated, Fully Implantable, Battery-Free System for Peripheral Nerve Restoration. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2104175. [PMID: 34608668 DOI: 10.1002/adma.202104175] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/14/2021] [Indexed: 06/13/2023]
Abstract
The long-segment peripheral nerve injury (PNI) represents a global medical challenge, leading to incomplete nerve tissue recovery and unsatisfactory functional reconstruction. However, the current electrical stimulation (ES) apparatuses fail perfect nerve repair due to their inability of the variable synchronous self-regulated function with physiological states. It is urgent to develop an implantable ES platform with physiologically adaptive function to provide instantaneous and nerve-preferred ES. Here, a physiologically self-regulated electrical signal is generated by integrating a novel tribo/piezoelectric hybrid nanogenerator with a nanoporous nerve guide conduit to construct a fully implantable neural electrical stimulation (FI-NES) system. The optimal neural ES parameters completely originate from the body itself and are highly self-responsive to different physiological states. The morphological evaluation, representative protein expression level, and functional reconstruction of the regenerated nerves are conducted to assess the PNI recovery process. Evidence shows that the recovery effect of 15 mm length nerve defects under the guidance of the FI-NES system is significantly close to the autograft. The designed FI-NES system provides an effective method for long-term accelerating the recovery of PNI in vivo and is also appropriate for other tissue injury or neurodegenerative diseases.
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Shi Q, Zhang J, Wang J, Du L, Shi Z, Xu M, Luo Y. Homologous Escherichia coli Identified in Cerebrospinal Fluid and Bloodstream. Front Cell Infect Microbiol 2021; 11:674235. [PMID: 34568083 PMCID: PMC8461209 DOI: 10.3389/fcimb.2021.674235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 08/11/2021] [Indexed: 11/29/2022] Open
Abstract
Background Escherichia coli is an opportunistic bacterium that causes a wide range of diseases, such as bloodstream infection and central nervous system infection. The traditional culture-based method to detect E. coli usually takes more than 2 days. The object of this study is to explore the value of metagenomic next-generation sequencing (mNGS) in identifying E. coli from human cerebrospinal fluid. In addition, we investigated the infection source of E. coli through whole genome sequencing and phylogenetic analysis. Methods We combined a clinical example to analyze the function of mNGS in pathogen detection from cerebrospinal fluid. NextSeq 550Dx platform was applied for mNGS. Next, whole genome sequencing was performed to obtain the genomic characterization of E. coli. Furthermore, we screened 20 E. coli strains from the National Center for Biotechnology Information and conducted a phylogenetic analysis. Results A middle-aged patient who attended our hospital was diagnosed with craniopharyngioma and received surgery. The patient had recurrent fever and persistent lethargy after surgery. Cerebrospinal fluid culture firstly failed to grow the bacteria. Next the cerebrospinal fluid sample was detected by mNGS and the sequence readings of E. coli were identified. Later, E. coli was reported via the second cerebrospinal fluid culture, certifying the result of mNGS. Moreover, we also cultured carbapenem-resistant E. coli from the patient’s bloodstream. Through whole genome sequencing and phylogenetic analysis, we found that the E. coli isolated from cerebrospinal fluid and the bloodstream was 100% homologous, indicating the E. coli central nervous system infection was originated from the bloodstream. Conclusion Metagenomic next-generation sequencing is a valuable tool to identify the pathogens from cerebrospinal fluid, and seeking the infection source is of great significance in clinical diagnosis and treatment. Furthermore, carbapenem-resistant E. coli is a serious problem as the cause of bloodstream infection and central nervous system infection, and effective and adequate measures to prevent and control the present circumstance are urgent.
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Hsu CCT, Jeavon C, Fomin I, Du L, Buchan C, Watkins TW, Nae Y, Parry NM, Aviv RI. Dual-Layer Spectral CT Imaging of Upper Aerodigestive Tract Cancer: Analysis of Spectral Imaging Parameters and Impact on Tumor Staging. AJNR Am J Neuroradiol 2021; 42:1683-1689. [PMID: 34326102 DOI: 10.3174/ajnr.a7239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 04/20/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Dual-layer spectral CT is a novel technology that utilized conventional single-tube CT acquisition with a dual-layer detector for the separation of high and low-energy photons to create spectral data for material decomposition. We evaluated the spectral parameters of iodine density and Z-effective values in primary head and neck squamous cell carcinoma and determined its impact on local tumor staging. MATERIALS AND METHODS Twenty-one patients with primary head and neck squamous cell carcinoma and 15 healthy controls were retrospectively evaluated. Iodine density (milligram/milliliter) and Z-effective values were compared quantitatively between head and neck squamous cell carcinoma and normal neck mucosa. The receiver operating characteristic area under the curve determined the diagnostic performance of the spectral data for local staging. We compared conventional CT images without and with iodine density and Z-effective images to determine its impact on local tumor staging. RESULTS Primary head and neck squamous cell carcinoma showed higher mean iodine density (2.01 [SD, 0.26] mg/mL, P < .001) and Z-effective values (8.21 [SD, 0.36], P < .001). A high interobserver correlation was demonstrated for ROI measurements for both the control group (iodine density, κ = 0.71, and Z-effective values, κ = 0.78) and head and neck squamous cell carcinoma (iodine density, κ = 0.84, and Z-effective values, κ = 0.75) group. The area under the curve for iodine density and Z-effective values was 0.98 and 0.93, respectively. Optimal thresholds were identified as 1.58 mg/mL (95% CI, 1.45-1.71 mg/mL; P < .001; sensitivity = 1.0; specificity = .0.93) for iodine density and 8.08 (95% CI, 7.96-8.19; P < .001; sensitivity = 0.86; specificity = 0.93) for Z-effective values. Conventional CT with the addition of dual-layer spectral data (iodine density and Z-effective values) improved the accuracy of local tumor staging in 3 of 21 patients (14%) with head and neck squamous cell carcinoma compared with the criterion standard surgical staging/histopathology. CONCLUSIONS Dual-layer spectral iodine density and Z-effective values provided increased quantitative and qualitative differentiation between upper aerodigestive head and neck squamous cell carcinoma and normal mucosa. Increased tissue differentiation improved the local tumor staging accuracy.
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Yin L, Du L, Li Y, Xiao Y, Zhang S, Ma H, He W. Quantitative Evaluation of Gastrocnemius Medialis Stiffness During Passive Stretching Using Shear Wave Elastography in Patients with Parkinson's Disease: A Prospective Preliminary Study. Korean J Radiol 2021; 22:1841-1849. [PMID: 34431245 PMCID: PMC8546131 DOI: 10.3348/kjr.2020.1338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 01/11/2023] Open
Abstract
Objective To prospectively investigate the feasibility of shear wave elastography (SWE) as a new quantitative and objective method for evaluating the stiffness of the gastrocnemius medialis (GM) muscle during passive stretching in patients with Parkinson's disease (PD). Materials and Methods SWE of the GM muscle was performed in 28 patients with PD [13 female and 15 male; mean age ± standard deviation (SD): 63.0 ± 8.5 years] and 12 healthy controls (5 female and 7 male; mean age ± SD: 59.3 ± 6.4 years) during passive ankle rotation. A Young's modulus-ankle angle curve was constructed. The GM slack angle and baseline Young's modulus (E0) were compared between the markedly symptomatic and mildly symptomatic sides of patients with PD, and healthy controls. Additionally, the correlation between the GM slack angle and the severity of rigidity, and the observer reproducibility of SWE in determining the GM slack angle were evaluated. Results The GM slack angle was smaller on both the markedly and mildly symptomatic sides in patients with PD than in healthy controls (mean ± SD of −29.13° ± 3.79° and −25.65° ± 3.39°, respectively, vs. −21.22° ± 3.52°; p < 0.001 and p = 0.006, respectively). Additionally, in patients with PD, the GM slack angle on the markedly symptomatic side was smaller than that on the mildly symptomatic side (p = 0.003). The E0 value was lower on both the markedly and mildly symptomatic sides in patients with PD than in healthy controls (mean ± SD of 10.11 ± 2.85 kPa and 10.08 ± 1.88 kPa, respectively, vs. 12.23 ± 1.02 kPa; p = 0.012 and p < 0.001, respectively). However, no significant difference was found between the markedly and mildly symptomatic sides in patients with PD (p = 0.634). A negative linear relationship was observed between the GM slack angle and lower limb rigidity score on the markedly symptomatic side in patients with PD (r = −0.719; p < 0.001). The intraclass correlation coefficients for observer reproducibility of SWE ranged from 0.880 to 0.951. Conclusion The slack angle determined by SWE may be a useful quantitative and reproducible method for evaluating muscle stiffness in patients with PD.
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Di Y, Cai S, Zheng S, Huang J, Du L, Song Y, Zhang M, Wang Z, Yu G, Ren L, Han H, Zhao Y. Reshaping the murine immunoglobulin heavy chain repertoire with bovine DH genes. Immunology 2021; 165:74-87. [PMID: 34428313 DOI: 10.1111/imm.13407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 08/04/2021] [Accepted: 08/19/2021] [Indexed: 11/30/2022] Open
Abstract
Having a limited number of VH segments, cattle rely on uniquely long DH gene segments to generate CDRH3 length variation (3-70 aa) far greater than that in humans or mice. Bovine antibodies with ultralong CDRH3s (>50 aa) possess unusual structures and abilities to bind to special antigens. In this study, we replaced most murine endogenous DH segments with bovine DH genes, generating a mouse line termed B-DH. The use of bovine DH genes significantly increased the length variation of CDRH3 and consequently the Ig heavy chain repertoire in B-DH mice. However, no ultralong CDRH3 was observed in B-DH mice, suggesting that other factors, in addition to long DH genes, are also involved in the formation of ultralong CDRH3. The B-DH mice mounted a normal humoral immune response to various antigens, although the B-cell developmental paradigm was obviously altered compared with wild-type mice. Additionally, B-DH mice are not predisposed to the generation of autoantibodies despite the interspecies DH gene replacement. The B-DH mice reported in this study provide a unique model to answer basic questions regarding the synergistic evolution of DH and VH genes, VDJ recombination and BCR selection in B-cell development.
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Du L, Chen F, Xu C, Tan W, Shi J, Tang L, Xiao L, Xie C, Zeng Z, Liang Y, Guo Y. Increased MMP12 mRNA expression in induced sputum was correlated with airway eosinophilic inflammation in asthma patients: evidence from bioinformatic analysis and experiment verification. Gene 2021; 804:145896. [PMID: 34384863 DOI: 10.1016/j.gene.2021.145896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Asthma is a common chronic airway inflammatory disease worldwide. Studies on gene expression profiles in induced sputum may provide noninvasive diagnostic biomarkers and therapeutic targets for asthma. OBJECTIVE To investigate mRNA expression of MMP12 in induced sputum and its relationship with asthma airway eosinophilic inflammation. METHODS GSE76262 dataset was analyzed using R software, weighted gene coexpression network analysis (WGCNA), and protein-protein interaction (PPI) network construction. The top ten hub genes were screened with Cytoscape software (version 3.8.4). We then verified the mRNA expression of MMP12 in two other datasets (GSE137268 and GSE74075) via ROC curve estimates and our induced sputum samples using real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR). Finally, we explored the correlation between MMP12 with asthmatic eosinophilic-related indicators. RESULTS We obtained the top ten hub genes, namely, CCL17, CCL2, CSF1, CCL22, CCR3, CD69, FCGR2B, CD1C, CD1E, and MMP12 via expression profile screening and validation on the GSE76262 dataset. MMP12 was selected as the candidate gene through further validation on GSE137268 and GSE74075 datasets. Finally, we demonstrated that the mRNA expression of MMP12 is significantly upregulated in induced sputum of asthmatic patients (p<0.05) and significantly correlated with eosinophilic-related indicators (p<0.05). These findings indicated that MMP12 can act as a diagnostic biomarker for asthma. CONCLUSION Our study successfully identified and demonstrated that MMP12 is a potential diagnostic biomarker for asthma due to its high expression and association with eosinophilic-related indicators. The results of this study can provide novel insights into asthmatic diagnosis and therapy in the future.
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Guo D, Du L, Chan CHY. P–501 Deep in the Maze: The psychosocial trajectory and decision making of Women with recurrent implantation failure of IVF. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
To understand the psychosocial trajectory of Chinese women who have experienced recurrent implantation failure (RIF) of IVF and their decision making accordingly.
Summary answer
Chinese women experience despair, doubt, and disorientation along with the cumulative failure cycles of IVF, and stick to IVF as the ultimate option.
What is known already
Recurrent implantation failure, the absence of implantation after repeated embryo transfers is a stressful event for people undergoing treatment for infertility. Numerous researches have focused on the psychological wellness of women undertaking IVF, but pay less attention to the subgroup who have undergone repeated failures. Current studies have shown that women after repeated unsuccessful IVF might endure anxiety, depression, and other psychosocial distress; however, the feelings brought by the different times of failure are unlike, and these experiences will affect their treatment decisions accordingly, which is rarely studied.
Study design, size, duration
Semi-structured interview was adopted with sixteen Chinese women from March 2020 to July 2020. The interview lasted 90 minutes. A follow-up survey was conducted three months after the interview. Driven by grounded theory, data is analyzed by thematic analysis.
Participants/materials, setting, methods
Convenience sampling was used to recruit female participants who have failed to achieve clinical pregnancy after two consecutive cycles of fresh or frozen IVF embryo transfers with a cumulative number of transferred embryos of four or more cleavage-stage embryos or two or more blastocysts. Chinese-speaking women who were undertaking IVF treatment in the reproductive center of hospital in Shenzhen City were recruited by pamphlets and doctors’ referral.
Main results and the role of chance
Chinese women with recurrent implantation failures experience the following psychosocial trajectory during the cumulative failure cycles of IVF: despair, doubt, and disorientation. Despair usually comes after the first failure: the high expectation for success rates makes the initial failure exceptionally shocking and desperate. Huge distress brings two kinds of decisions: start a new IVF cycle quickly to welcome the positive results in the imagination, or wait for a period of time to avoid the pain of failure again. Doubt usually appears after the second failure. In addition to doubting the health function of their body, recurrent failure makes the patients particularly doubt the efficacy of IVF and doctors’ clinical judgment. Some patients would do ‘hospital shopping’ and consider change clinics. Disorientation can be seen in patients who have experienced more than three cycles of failure. Past experience and meaning cannot help them understand and solve the current dilemma. The inherent concept of fertility continues to strengthen their belief of having a baby as ultimate goal. The follow-up survey found that most women still choose to continue IVF treatment after repeated failure. They are like being in the maze of fertility, wandering for a long time but unable to get out.
Limitations, reasons for caution
Several limitations are identified: self-selection bias due to convenience sampling; narrow sampling approach may limits the generalizability; the exclusion of men may ignore the marital interdependence during the infertility treatment.
Wider implications of the findings: Patients who have experienced recurrent implantation failure demand promising intervention during and after infertility treatment. The findings demonstrate the need for both supportive and implication counseling to facilitate them cope with the psychosocial distress, and make value-based decision making, so as to enhance their self-agency.
Trial registration number
Not applicable
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Yang F, Brady SW, Tang C, Sun H, Du L, Barz MJ, Ma X, Chen Y, Fang H, Li X, Kolekar P, Pathak O, Cai J, Ding L, Wang T, von Stackelberg A, Shen S, Eckert C, Klco JM, Chen H, Duan C, Liu Y, Li H, Li B, Kirschner-Schwabe R, Zhang J, Zhou BBS. Chemotherapy and mismatch repair deficiency cooperate to fuel TP53 mutagenesis and ALL relapse. NATURE CANCER 2021; 2:819-834. [PMID: 35122027 DOI: 10.1038/s43018-021-00230-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 06/02/2021] [Indexed: 06/14/2023]
Abstract
Chemotherapy is a standard treatment for pediatric acute lymphoblastic leukemia (ALL), which sometimes relapses with chemoresistant features. However, whether acquired drug-resistance mutations in relapsed ALL pre-exist or are induced by treatment remains unknown. Here we provide direct evidence of a specific mechanism by which chemotherapy induces drug-resistance-associated mutations leading to relapse. Using genomic and functional analysis of relapsed ALL we show that thiopurine treatment in mismatch repair (MMR)-deficient leukemias induces hotspot TP53 R248Q mutations through a specific mutational signature (thio-dMMR). Clonal evolution analysis reveals sequential MMR inactivation followed by TP53 mutation in some patients with ALL. Acquired TP53 R248Q mutations are associated with on-treatment relapse, poor treatment response and resistance to multiple chemotherapeutic agents, which could be reversed by pharmacological p53 reactivation. Our findings indicate that TP53 R248Q in relapsed ALL originates through synergistic mutagenesis from thiopurine treatment and MMR deficiency and suggest strategies to prevent or treat TP53-mutant relapse.
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Li H, Zhang X, Wei W, Zhang L, Chen Z, Cao M, Cheng J, Du L, Zhao J, Fang Z, Li X, Chen P. An innovative application of follicular unit extraction technique in the treatment of bromhidrosis. J Eur Acad Dermatol Venereol 2021; 35:2300-2304. [PMID: 34331817 DOI: 10.1111/jdv.17571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/21/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Surgery is the most effective way to treat bromhidrosis, but postoperative complications are still the biggest obstacles for patients to choose surgical treatment. OBJECTIVES To introduce an innovative application of follicular unit extraction (FUE) in the treatment of bromhidrosis. METHODS We conducted a case series study on 20 patients who received FUE technique for the treatment of bromhidrosis. The axillary hair follicles were extracted with a one-millimetre punch. The released hair follicles were collected for histological examination. After the operation, the wounds were wrapped with moderate pressure. The dressing was removed 24 h after the FUE operation. The postoperative complications were collected, and the improvement of malodour was evaluated by the 10-point visual analogue scale. RESULTS Immediately postoperation, many needle-shaped holes appeared in the armpits. The holes healed 7 days after the operation, with no scar or pinpoint-like scars. Except for a female who complained of mild pain in the left armpit, no other patients had any discomfort. The malodour level varied between 0 and 4 during the follow-up period. The tissue examination showed that more than 90% of the completely plucked hair follicles were accompanied by apocrine glands, and many blocked and dilated apocrine glands were observed. The lumens of the blocked glands were filled with decapitation products, which were positive for K5, Brst-2 and CEA. CONCLUSIONS Patients with bromhidrosis have a positive response to FUE technique. The FUE technique is well-tolerated, with only a few postoperative complications, which deserves to be widely promoted.
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Yang F, Brady SW, Sun H, Tang C, Du L, Barz M, Ma X, Chen Y, Fang H, Li X, Kolekar P, Pathak O, Cai J, Ding L, Wang T, von Stackelberg A, Shen S, Duan C, Eckert C, Chen H, Liu Y, Klco JM, Li H, Li B, Zhang J, Kirschner-Schwabe R, Zhou BBS. Abstract 633: Thiopurines and mismatch repair deficiency cooperate to fuel TP53 mutagenesis and ALL relapse. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Chemotherapy is curative for most children with acute lymphoblastic leukemia (ALL). Here we provide direct evidence that thiopurine chemotherapeutics can also directly induce drug resistance mutations leading to relapse. Using a large relapsed ALL cohort assembled from Chinese, US and German patients, we found that TP53 R248Q mutations were highly enriched at relapse compared to diagnosis. Relapse-specific TP53 R248Q was associated with the acquisition of MMR deficiency mutations in MSH2, MSH6, or PMS2 and a novel relapse-specific mutational signature. Using isogenic MCF10A cells with or without engineered MSH2 knockout, and the Nalm6 ALL cell line which has native MMR deficiency, we found that this novel signature was caused by a synergistic mutagenic interaction between thiopurine treatment and mismatch repair (MMR) deficiency (called the thio-dMMR signature) that contributes to a hypermutator phenotype and acquisition of TP53 R248Q in residual ALL during remission. Treatment-induced TP53-mutant clones then expand due to broad chemoresistance, leading to eventual relapse. Indeed, thiopurines preferentially induced C>T mutations at the center of NCG trinucleotides, which can lead to TP53 R248Q, and the thiopurine mutation rate was accelerated 2- to 10-fold in MMR-deficient ALL and cell lines. Thiopurine treatment induced C>T mutations preferentially on the transcribed strand, rather than the untranscribed strand, of mRNAs, which further increased the likelihood of TP53 R248Q induction. Further, experimental thiopurine treatment was able to directly induce TP53 R248Q variants in MMR-deficient cultured cells, including Nalm6 and MCF10A MSH2-/-, by activating the thio-dMMR mutational signature, while MMR-proficient MCF10A cells did not experience R248Q induction. The sequential acquisition of MMR deficiency mutations, followed by TP53 mutations, during post-diagnosis ALL evolution was supported by clonal evolution analysis of serial patient samples. p53 R248Q promoted resistance to multiple ALL chemotherapeutic agents, and was associated with on-treatment relapse and poor relapse-treatment response. Our findings indicate that the enrichment of TP53 R248Q in relapsed ALL is due to synergistic mutagenesis from thiopurine treatment and MMR deficiency, followed by selection for TP53 R248Q's chemoresistance phenotype. This suggests that cancer drug resistance mutations may not always pre-exist subclonally at diagnosis, but may be therapy-induced in some patients. Additionally, the qualitative and quantitative mutational signature output of a mutagen (e.g., thiopurines) can vary based on the genetic background. Finally, our findings suggest potential therapeutic strategies, including avoiding thiopurine treatment in MMR-deficient relapses, and therapeutic p53 mutant reactivation, to deal with this genetically-unstable, chemoresistant disease.
Citation Format: Fan Yang, Samuel W. Brady, Huiying Sun, Chao Tang, Lijuan Du, Malwine Barz, Xiaotu Ma, Yao Chen, Houshun Fang, Xiaomeng Li, Pandurang Kolekar, Omkar Pathak, Jiaoyang Cai, Lixia Ding, Tianyi Wang, Arend von Stackelberg, Shuhong Shen, Caiwen Duan, Cornelia Eckert, Hongzhuan Chen, Yu Liu, Jeffery M. Klco, Hui Li, Benshang Li, Jinghui Zhang, Renate Kirschner-Schwabe, Bin-Bing S. Zhou. Thiopurines and mismatch repair deficiency cooperate to fuel TP53 mutagenesis and ALL relapse [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 633.
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Hsu CCT, Du L, Luong D, Suthiphosuwan S, Bharatha A, Krings T, Haacke EM, Osborn AG. More on Exploiting the T1 Shinethrough and T2* Effects Using Multiecho Susceptibility-Weighted Imaging. AJNR Am J Neuroradiol 2021; 42:E62-E63. [PMID: 34167958 DOI: 10.3174/ajnr.a7175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Everett D, Ke W, Paquet JF, Vujanovic G, Bass SA, Du L, Gale C, Heffernan M, Heinz U, Liyanage D, Luzum M, Majumder A, McNelis M, Shen C, Xu Y, Angerami A, Cao S, Chen Y, Coleman J, Cunqueiro L, Dai T, Ehlers R, Elfner H, Fan W, Fries RJ, Garza F, He Y, Jacak BV, Jacobs PM, Jeon S, Kim B, Kordell M, Kumar A, Mak S, Mulligan J, Nattrass C, Oliinychenko D, Park C, Putschke JH, Roland G, Schenke B, Schwiebert L, Silva A, Sirimanna C, Soltz RA, Tachibana Y, Wang XN, Wolpert RL. Phenomenological Constraints on the Transport Properties of QCD Matter with Data-Driven Model Averaging. PHYSICAL REVIEW LETTERS 2021; 126:242301. [PMID: 34213947 DOI: 10.1103/physrevlett.126.242301] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/05/2021] [Accepted: 05/27/2021] [Indexed: 06/13/2023]
Abstract
Using combined data from the Relativistic Heavy Ion and Large Hadron Colliders, we constrain the shear and bulk viscosities of quark-gluon plasma (QGP) at temperatures of ∼150-350 MeV. We use Bayesian inference to translate experimental and theoretical uncertainties into probabilistic constraints for the viscosities. With Bayesian model averaging we propagate an estimate of the model uncertainty generated by the transition from hydrodynamics to hadron transport in the plasma's final evolution stage, providing the most reliable phenomenological constraints to date on the QGP viscosities.
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Du L, Kruse A. Cell disruption and value-added substances extraction from Arthrospira platensis using subcritical water. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2021.105193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Li J, Li B, Sui G, Du L, Zhuang Y, Zhang Y, Zou Y. Removal of volatile organic compounds from air using supported ionic liquid membrane containing ultraviolet-visible light-driven Nd-TiO2 nanoparticles. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130023] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ke C, Ma Y, Pan D, Wan Z, Feng T, Yu D, Liu X, Wang H, Du M, Huang L, Zhang Y, Du L, Wang X, Li K, Yu D, Zhang M, Huang J, Qu J, Ren L, Hu Y, Cao G, Hu X, Wu S, Han H, Zhao Y. FcRn is not the receptor mediating the transfer of serum IgG to colostrum in pigs. Immunology 2021; 163:448-459. [PMID: 33738807 DOI: 10.1111/imm.13328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 03/11/2021] [Accepted: 03/12/2021] [Indexed: 02/02/2023] Open
Abstract
In contrast to humans or rabbits, in which maternal IgG is transmitted to offspring prenatally via the placenta or the yolk sac, large domestic animals such as pigs, cows and sheep transmit IgG exclusively through colostrum feeding after delivery. The extremely high IgG content in colostrum is absorbed by newborns via the small intestine. Although it is widely accepted that the neonatal Fc receptor, FcRn, is the receptor mediating IgG transfer across both the placenta and small intestine, it remains unclear whether FcRn also mediates serum IgG transfer across the mammary barrier to colostrum/milk, especially in large domestic animals. In this study, using a FcRn knockout pig model generated with a CRISPR-Cas9-based approach, we clearly demonstrate that FcRn is not responsible for the IgG transfer from serum to colostrum in pigs, although like in other mammals, it is involved in IgG homeostasis and mediates IgG absorption in the small intestine of newborns.
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Qu Q, Zhou Y, Shi P, Du L, Fan Z, Wang J, Li X, Chen J, Zhu D, Ye K, Hu Z, Miao Y. Platelet-rich plasma for androgenic alopecia: A randomized, placebo-controlled, double-blind study and combined mice model experiment. J Cosmet Dermatol 2021; 20:3227-3235. [PMID: 33752252 DOI: 10.1111/jocd.14089] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/09/2021] [Accepted: 03/15/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Platelet rich plasma (PRP) has been accepted as a potential therapy for treating androgenetic alopecia (AGA). OBJECTIVE To fully clarify the underling molecular mechanisms of PRP action on hair growth and promote its clinical applications. METHODS In this study, we used mice models and protein biochip to explore the specific mechanisms of PRP regulating hair growth. Then, we performed a randomized, placebo-controlled, double-blind, half-head study of 52 AGA patients to verify the therapeutic efficacy of PRP in Chinese AGA patients. RESULTS The results confirmed that PRP treatment boosted hair regrowth, accelerated hair cycling, and the effect sustained for more than one hair cycle in mice. Protein biochip evaluation confirmed remarkably upregulated β-Catenin, PDGF, and AKT signaling and repressed p53 signaling in PRP injection group. Clinically, mean hair count, density, diameter, and anagen hair ratio in PRP group showed a significant improvement at 6 month comparing to control side. CONCLUSIONS Overall, we elucidated the specific molecular mechanism of PRP action on hair growth and proved the therapeutic efficacy and safety of PRP in Chinese AGA patients.
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