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Chen L, Tao L, Ma X, Quan Y, Li Z, Luo Z, Chang Y. Effects of Peer Video Feedback Based on Cultural Historical Activity Theory in the Operational Training of New Nurses: A Quasi-Experimental Study. J Contin Educ Nurs 2025; 56:27-33. [PMID: 39724066 DOI: 10.3928/00220124-20241213-06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2024]
Abstract
BACKGROUND Previous studies have confirmed the potential effectiveness of peer video feedback in the operational training of health care students. However, an appropriate theoretical framework to support peer video feedback has not been established. The cultural historical activity theory (CHAT) provides a suitable framework. This study evaluated the effectiveness of a peer video feedback activity system, adapted from CHAT, in enhancing operational skills, self-regulated learning abilities, and teaching satisfaction among new nurses. METHOD A quasi-experimental design was employed, involving 213 new nurses. The experimental group received training through a CHAT-based peer video feedback activity system, and the control group was trained through traditional instructor feedback. Data were collected after seven operational training sessions provided by the nursing department. RESULTS Posttraining, the CHAT group scored statistically higher in operational examinations, self-regulated learning abilities, and teaching satisfaction compared with the control group (p = .004, p = .004, and p < .001, respectively). CONCLUSION Operational training with a peer video feedback activity system can significantly enhance the operational skills, self-regulated learning abilities, and teaching satisfaction of new nurses. [J Contin Educ Nurs. 2025;56(1):27-33.].
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Kang S, Ma X, Hu Y. Dynamic analysis and optimal control of competitive information dissemination model. Sci Rep 2024; 14:31548. [PMID: 39741151 DOI: 10.1038/s41598-024-82512-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2024] [Accepted: 12/05/2024] [Indexed: 01/02/2025] Open
Abstract
Information dissemination is vital to human production and life. Identifying and analyzing the modes and mechanisms of information dissemination under different conditions is conducive to playing the role of positive information and reducing the impact of negative information. Considering that multiple pieces of information coexist and conflict with each other, in this paper, a competitive information dissemination model is established and the proposed system is analyzed. The next generation matrix method is used to determine the basic reproduction number R0. The equilibrium conditions of the system are presented, and the Routh-Hurwitz stability criterion and the second method of Liapunov are used for performing stability analysis. Based on Pontryagin's extreme value principle, the influence rate and the isolation rate of the boot mechanism are chosen as control parameters. In addition, the optimal control parameter expression of the system and optimal control system are presented. The numerical simulation shows various states and changes in information dissemination. The results presented in this work show that the competitive information suppresses other competitive information during the process of dissemination. The results presented in this paper can serve as a reference for relevant departments to manage information dissemination.
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Zhang D, Yu H, Gu M, Zhang S, Ma X, Zhang W, Zhu Y, Al-Wraikat M, Abubaker MA, Zhang R, Liu Y. Unveils key proteins in Xinjiang goat muscle linked to post-mortem meat quality: A TMT-based proteomic analysis. Food Chem X 2024; 24:101847. [PMID: 39398871 PMCID: PMC11470461 DOI: 10.1016/j.fochx.2024.101847] [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: 06/03/2024] [Revised: 09/02/2024] [Accepted: 09/17/2024] [Indexed: 10/15/2024] Open
Abstract
An extensive proteomic analysis utilizing the tandem mass tag (TMT) method was conducted to investigate the changes in protein expression in the longissimus dorsi muscle of Xinjiang goats over various post-mortem intervals: immediately after death within 0 h, 12 h, 24 h and 48 h. The investigation carefully identified around 108 proteins that showed significant changes in expression during these intervals. Among these proteins, six were highlighted for their crucial roles in muscle growth and differentiation of muscle fibers post-mortem. These proteins, namely COL12A1, MRPL46, CTNNB1, MYH1, CAPZA1, and MYL9, have a direct effect on the meat's quality attributes, such as tenderness and color. Further discuss observed a progressive increase in the expression of proteins linked with oxidative metabolism (MSRB2, ENOX1, LOC102170282, GSTM1, and AOC3) as the post-mortem aging period extended, particularly between 24 h to 48 h. These proteins are instrumental in defining the color and flavor profiles of goat meat, underscoring the importance of precise processing and storage conditions to preserve meat quality during the critical aging phase. This enhanced understanding of protein expression dynamics offers significant implications for optimizing meat quality and provides a scientific basis for post-mortem handling practices in the goat meat industry.
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Li Y, Wang W, Sun L, Huang J, Ma X, Li S, Shi X. USP37 promotes diffuse large B-cell lymphoma progression by deubiquitinating and stabilizing c-myc. J Mol Histol 2024; 56:54. [PMID: 39722070 DOI: 10.1007/s10735-024-10323-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Accepted: 11/27/2024] [Indexed: 12/28/2024]
Abstract
A poorer prognosis is thought to be associated with "double expressor lymphomas," which are a subtype of diffuse large B cell lymphomas (DLBCL) that co-express MYC and BCL2. While the role of ubiquitin-specific peptidase 37 (USP37) in lung cancer, where it mediates the deubiquitination and stabilization of c-myc, has been well-documented, its involvement in DLBCL remains unexplored. The use of RT-PCR, immunohistochemistry, or WB test allowed for the detection of elevated USP37 in DLBCL tissues and cells. In order to understand the function of USP37 in DLBCL, keloid DLBCL cells were transfected with si-USP37 using Lipofectamine 3000. When tested on DLBCL cells, USP37 increased cell proliferation and inhibited cell cycle progression. USP37 controls the process of deubiquitination to stabilise c-myc proteins. The overexpression of c-Myc facilitated cell proliferation and prevented the cell cycle of DLBCL cells stimulated by si-USP37, which should be taken into consideration. Furthermore, USP37 depletion consistently hinders the development of tumour xenografts in mouse models. Overexpressing c-myc, however, may partially counteract this impact. The data show that USP37 may be a potential therapeutic target for DLBCL, and that it may enhance the course of the disease by deubiquitinating c-myc via direct interactions with c-myc.
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He LQ, Wang XZ, Jin J, Ma X, Luo JF, Zeng HS. [Interpretation of the ESC 2024 Guidelines for the management of peripheral arterial and aortic diseases]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 2024; 52:1431-1435. [PMID: 39681449 DOI: 10.3760/cma.j.cn112148-20240927-00576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/18/2024]
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Ma X, Wei X, Xing S, Cheng X, Lu J, Yang C, Zhao G, Dai Z, Hou S, Liu Y, Zhu D. Polyketide production in a mangrove-associated fungus Diaporthe goulteri, induced by chemical epigenetic modification. Nat Prod Res 2024:1-9. [PMID: 39714031 DOI: 10.1080/14786419.2024.2441496] [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: 07/11/2024] [Revised: 11/05/2024] [Accepted: 12/09/2024] [Indexed: 12/24/2024]
Abstract
Studies on the chemical composition of endophytic fungus Diaporthe goulteri, isolated from the Acanthus ilicifolius L., by using epigenetic modification to activate clusters of biosynthetic genes that are silenced or poorly expressed in fungi, resulting in obtainment of ten polyketides. Among these compounds were six new compounds, including cytosporin E2 (1), cytosporin D1 (2), cytosporin G1 (3), cytosporin J1 (4), cytosporin K1 (5), cytosporin F1 (6), and four known compounds, cytosporin E (7), cytosporin Y3 (8), cytosporin D (9), and cytosporin L (10). The structures of the compounds were established by comprehensive spectroscopic analysis, quantum-chemical calculations, and the modified Mosher's method. The cytotoxic, antioxidant and anti-inflammatory activities of the isolated compounds were evaluated.
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Guo S, Yu Y, Bu Y, Ren J, Zhang L, Ma X, Li J, Li A, Liu X. Pan-cancer analysis reveals the prognostic and immunomodulatory potential of super-enhancer-induced ANGPT2 and experimental validation in colorectal cancer. Clin Transl Oncol 2024:10.1007/s12094-024-03818-5. [PMID: 39695006 DOI: 10.1007/s12094-024-03818-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2024] [Accepted: 11/23/2024] [Indexed: 12/20/2024]
Abstract
BACKGROUND ANGPT2 plays important roles in cancer development. However, there is still no systematic analysis of ANGPT2 in pan-cancer. METHODS In this paper, we conducted a pan-cancer analysis to investigate the characteristics of ANGPT2. Furthermore, we investigated the impact of genetic and epigenetic factors on ANGPT2 expression by bioinformatics and assays. RESULTS By several TCGA and GEO databases, we identified elevated expression of ANGPT2 in various tumor types. Besides, high expression of ANGPT2 induced poor prognosis of patients in multiple tumors. Through enrichment analysis, we found that ANGPT2 participated in various biological processes, including angiogenesis and immunity. Various immune analyses indicated that high expression of ANGPT2 might suggest a propensity towards a hot tumor microenvironment, but its impact on immunotherapy was negative. Bioinformatics analysis and experiments confirmed that genetic and epigenetic factors explained part of the mechanism behind ANGPT2 abnormal expression. Finally, we screened candidate drugs targeting the ANGPT2 protein by molecular docking and molecular dynamics simulation. CONCLUSION ANGPT2 has diagnostic and prognostic values in multiple tumor types. Though with a hot tumor microenvironment, ANGPT2 high expression patients are not suitable for immunotherapy because of its proangiogenic function, contributing to selecting the exact patients for immunotherapy. Both genetic and epigenetic factors influenced ANGPT2 expression, with the influence of super-enhancer being more pronounced. This paper for the first time did the systematic analysis of ANGPT2 and showed its characteristic in pan-cancer. We summarized the biomarker role of ANGPT2 on tumor diagnosis and prognosis, as well as its target role on tumor immunotherapy.
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Cui Y, Gao Y, Zhou Y, Ma X, Wang Y, Zhou T, Wen J, Chen S, Lu L, Tong A, Li Y. A novel strategy for predicting the efficacy of temozolomide treatment for metastatic pheochromocytomas/paragangliomas. J Endocrinol Invest 2024; 47:3039-3048. [PMID: 38837102 DOI: 10.1007/s40618-024-02398-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 05/20/2024] [Indexed: 06/06/2024]
Abstract
BACKGROUND There are few studies on the efficacy of temozolomide (TMZ) in the treatment of Metastatic pheochromocytoma / paraganglioma (MPP) patients. And it remains unclear which MPP patients may benefit from TMZ treatment. METHODS This was a prospective study. MPP patients were enrolled. Patients were treated with TMZ until disease progression or intolerable toxicities. The primary endpoints were disease control rate (DCR) and objective response rate (ORR). Secondary endpoints included biochemical response rate progression-free survival (PFS) and safety. We compared the difference between effective and ineffective groups, to explore which patients are more suitable for TMZ treatment. RESULTS 62 patients with MPP were enrolled and tumor response were evaluated in 54 patients. The DCR was 83% (35/42), and the ORR was 24% (10/41) among the progressive patients. PFS was 25.2 ± 3.1 months. The most common adverse event was nausea (41/55). We found that 92.9% (13/14) of patients with MGMT methylation greater than 7% respond to treatment. For the patients with MGMT methylation less than 7%, Ki-67 index could be used to guide the use of TMZ in these patients. Among the patients with Ki-67 index less than 5%, 66% (8/12) patients showed respond to treatment, and only 33% (4/12) patients with Ki-67 index more than 5% showed respond to TMZ. CONCLUSIONS This study indicated that TMZ is a potential choice for the treatment of MPP with the high ability on disease control and well tolerability. We recommended to MGMT methylation analysis test and Ki-67 index to guide TMZ application.
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Zhang L, Yu Y, Li G, Li J, Ma X, Ren J, Liu N, Guo S, Li J, Cai J. Identification of PANoptosis-based signature for predicting the prognosis and immunotherapy response in AML. Heliyon 2024; 10:e40267. [PMID: 39634422 PMCID: PMC11616514 DOI: 10.1016/j.heliyon.2024.e40267] [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: 03/21/2024] [Revised: 09/21/2024] [Accepted: 11/07/2024] [Indexed: 12/07/2024] Open
Abstract
Background In recent years, the incidence of acute myeloid leukemia (AML) has increased rapidly with a suboptimal prognosis. In AML, cell death is independent of tumorigenesis, tumor invasion, and drug resistance. PANoptosis is a newly discovered form of cell death that combines pyroptosis, apoptosis, and necroptosis. However, no studies have explored the role of PANoptosis-based signatures in AML. Methods We screened for PANoptosis-related genes and established a PANoptosis-risk signature using the least absolute shrinkage and selection operator (LASSO) and Cox regression analysis. We combined TCGA, bulk RNA sequencing, and single-cell sequencing to investigate the correlation between candidate genes and the AML tumor microenvironment. Results The PANoptosis risk signature effectively predicted prognosis with good sensitivity and specificity. The risk score emerged as an independent prognostic factor. Functional enrichment analysis of PANoptosis-related differentially expressed genes suggested that the risk score may be related to cell immunity. Patients with high-risk scores exhibited increased immune cell infiltration, implying a hot tumor immune microenvironment. The risk score was positively correlated with the immune scores and expression levels of immune checkpoints. Therefore, we identified three model factors, BIRC3, PELI1, and PRKACG, as predictors for immunotherapy efficacy. Single-cell sequencing analysis demonstrated that PELI1 and BIRC3 may participate in the regulation of the AML immune microenvironment. Finally, we performed a drug sensitivity analysis to target BIRC3 and PELI1 using molecular docking and molecular dynamics simulations. Conclusion Our study established and verified a PANoptosis risk signature to predict the survival and immunological treatment response in AML.
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Han Y, Jin Y, Yang G, Ma X, Wang X, Qi D, Wang T, Jiang J. Covalent Organic Framework Controls the Aggregation of Metal Porphyrins for Enhanced Photocatalytic H 2 Evolution. Chem Asian J 2024:e202401342. [PMID: 39582073 DOI: 10.1002/asia.202401342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2024] [Revised: 11/24/2024] [Accepted: 11/24/2024] [Indexed: 11/26/2024]
Abstract
Although different post modifications of covalent organic frameworks (COFs) have been developed for achieving hierarchical nanostructures and improved photocatalytic performance, the co-assemblies of COFs with small organic molecules were still rarely studied. Herein, COF/porphyrin composites, which were fabricated at room temperature, reveal that COFs surface can modulate the aggregation of metal porphyrins, which subsequently enhance the photocatalytic properties of COFs assemblies. Thus, the surface of COFs was decorated by porphyrins aggregations with varied thickness, dependent on the metal ions of porphyrins. Ni(II) meso-Tetra (4-carboxyphenyl) porphine (NiTCPP) formed discontinuous monolayer covering on COFs surface, while Pt(II) meso-Tetra (4-carboxyphenyl) porphine (PtTCPP) or Co(II) meso-Tetra (4-carboxyphenyl) porphine (CoTCPP) aggregated into multilayer coverage. Notably, even though NiTCPP did not show any advantages in terms of light absorption or HOMO/LUMO energy levels, COF/NiTCPP with the lowest porphyrin loading still exhibited the highest photocatalytic H2 evolution (29.71 mmol g-1 h-1), which is 2.5 times higher than that of COF/PtTCPP or COF/CoTCPP. These results open new possibilities for making highly efficient photocatalysts upon the co-assemblies of COFs with small organic molecules.
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Duan H, Tao L, Wu K, Li Q, Zhou X, Dong P, Sun X, Lin L, Ma X, Zhao R, Wang Q. Association of depression with gastroesophageal reflux disease, and the mediating role of risk factors: a Mendelian randomization study. Front Psychiatry 2024; 15:1425730. [PMID: 39606001 PMCID: PMC11600978 DOI: 10.3389/fpsyt.2024.1425730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 10/15/2024] [Indexed: 11/29/2024] Open
Abstract
Background Growing evidence suggests that depression affects gastroesophageal reflux disease (GERD). But, the relationship between depression and GERD is unclear. To examine the relationship between depression and the risk of GERD, as well as the mediating role of risk factors. Methods We found genetic variants associated with GERD (N = 78,707) and depression (N = 500,199 (excluding 23 and Me) from the largest genome-wide association study and we applied two-sample Mendelian randomization (MR) to find out if they are related. We further used two-step MR to find the mediating factors. Results The results found a causal link between depression and GERD, inverse-variance weighted (IVW), risk OR 2.149 (95% CI, 1.910 to 2.418; P <0.001). F-statistics for all instrumental variables (IVs) were greater than 10. Multivariate MR maintained the significance of the depression-GERD link even after adjusting for body mass index (BMI), waist-to-hip ratio (WHR), and educational attainment (EA). Mediation analysis revealed that increased depression is associated with lower EA (OR = 0.94; 95% CI, 0.89 to 0.99; P = 0.03), while EA itself significantly impacts GERD risk (OR = 0.25; 95% CI, 0.18 to 0.34; P = 8.24 × 10-9). Ultimately, EA mediates the effect of depression on GERD (OR = 1.09; 95% CI, 1.01 to 1.18; P = 0.04), accounting for 11.4% of the mediated effect. Conclusions Depression is associated with an increased risk of developing GERD, with some of the effects mediated by EA. This result may provide important information for the prevention and intervention of depression and GERD.
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Han K, Wang F, Ma X, Wu Y, Zhang H, Zhao Y, Wang H, Ma J, Luan X. Human placental mesenchymal stromal cells alleviate intestinal oxidative damage in mice with graft-versus-host disease via CD73/adenosine/PI3K/Akt/GSK-3β axis. Cell Signal 2024; 123:111372. [PMID: 39209221 DOI: 10.1016/j.cellsig.2024.111372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 08/03/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND Intestinal damage is a common and serious complication in patients with graft-versus-host disease (GVHD). Human placental mesenchymal stromal cells (hPMSCs) ameliorate GVHD tissue damage by exerting anti-oxidative effects; however, the underlying mechanisms remain not fully clear. METHODS A GVHD mouse model and tumor necrosis factor-α (TNF-α)-stimulated human colon epithelial cell lines NCM460 and HT-29 cells were used to investigate the mechanisms of hPMSCs alleviating GVHD-induced intestinal oxidative damage. RESULTS hPMSCs reduced TNF-α concentrations and the number of CD3+TNF-α+ T-cells, which were negatively correlated with the expression of claudin-1, occludin, and ZO-1, through CD73 in the colon tissue of GVHD mice. Meanwhile, hPMSCs reduced the mean fluorescence intensity (MFI) of reactive oxygen species (ROS) and the concentration of malondialdehyde (MDA), promoted superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) activities, as well as claudin-1, occludin, and ZO-1 expression, in colonic epithelial cells of GVHD mice and TNF-α-stimulated cells via CD73. Moreover, hPMSCs upregulated adenosine (ADO) concentrations in GVHD mice and TNF-α-stimulated cells and mitigated the loss of tight junction proteins via the CD73/ADO/ADO receptors. Further analysis showed that hPMSCs diminished Fyn expression and enhanced Nrf2, GCLC, and HO-1 expression in both TNF-α-stimulated cells and colonic epithelial cells of GVHD mice by activating PI3K/Akt/GSK-3β pathway. CONCLUSIONS The results suggested that hPMSC-mediated redox metabolism balance and promoted tight junction protein expression were achieved via CD73/ADO/PI3K/Akt/GSK-3β/Fyn/Nrf2 axis, by which alleviating intestinal oxidative injury in GVHD mice.
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Zhu X, Zhang S, Gao Y, Guo D, Xu J, Zhang R, Zhao D, Lin K, Zhu X, Xing D, Cui S, Passalidis S, Dubois A, Ma X. Direct Evidence of Breakdown of Spin Statistics in Ion-Atom Charge Exchange Collisions. PHYSICAL REVIEW LETTERS 2024; 133:173002. [PMID: 39530804 DOI: 10.1103/physrevlett.133.173002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 07/25/2024] [Accepted: 09/20/2024] [Indexed: 11/16/2024]
Abstract
Recent experimental studies have questioned the validity of spin statistics assumptions, particularly in charge exchange processes occurring in atomic MeV collisions. Here, we study spin-resolved single electron capture processes in collisions between C^{3+} ions and helium within an energy range of 1.25-400 keV/u. Using high resolution reaction microscope and multielectronic theoretical approaches, we directly measure and calculate the true population information of the C^{2+}(1s^{2}2s2p ^{1,3}P) states at the time of electron capture, overcoming the previous experimental and theoretical difficulties. At the level of integral and scattering angle differential cross sections, our results demonstrate the breakdown of pure spin statistics arguments, especially at high impact energies where they are traditionally expected to be valid. These novel findings and conclusions raise intriguing questions both in the understanding of the electronic dynamics during such fast collisional processes and in exploring quantum manipulation of atomic and molecular reactivity.
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Du YW, Jiang CY, Miao Q, Xiao X, Wang QX, Hua J, Lian M, Ma X. [Clinical characteristics and prognosis analysis of patients with IgG4-related hepatobiliary-pancreatic disease]. ZHONGHUA GAN ZANG BING ZA ZHI = ZHONGHUA GANZANGBING ZAZHI = CHINESE JOURNAL OF HEPATOLOGY 2024; 32:916-922. [PMID: 39528327 DOI: 10.3760/cma.j.cn501113-20230828-00073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/16/2024]
Abstract
Objective: To explore and analyze the clinical features of patients with immunoglobulin (Ig)G4-related hepatobiliary-pancreatic disease and the independent factors affecting the prognosis of IgG4-related sclerosing cholangitis (IgG4-SC). Methods: The clinical data of 179 adult cases diagnosed with IgG4-related hepato-pancreato-biliary disease in the Division of Gastroenterology and Hepatology, Renji Hospital, Shanghai Jiao Tong University School of Medicine from January 2011 to December 2022 were retrospectively analyzed. Patients were divided into three groups: isolated IgG4-SC, IgG4-SC/type 1 autoimmune pancreatitis(type 1 AIP), and isolated AIP according to the clinical manifestations. Demographic characteristics, baseline biochemical immunological indexes, and imaging manifestations were analyzed. The treatment response rate and survival rate were compared. The COX proportional hazards model was used to analyze the independent factors related to prognosis. Results: The mean age of diagnosis of patients with IgG4-related hepatobiliary-pancreatic disease was 60.3±12.0 years. Males accounted for 74.9%, and the median follow-up time was 38 months. The 1-year clinical response rate of patients with isolated IgG4-SC was lower than that of IgG4-SC/AIP (67.9% vs. 91.7%, P=0.019), and the primary endpoint-free 5-year survival rate was significantly reduced (64.9% vs. 95.9%, P<0.001). COX regression analysis showed that having cirrhosis before treatment (HR=6.708, P=0.004) and poor response after half a year of treatment (HR=11.488, P=0.002) were independent risk factors associated with the occurrence of adverse events in hepatobiliary diseases among patients with IgG4-SC. Conclusions: The clinical response rate and survival rate of patients with isolated IgG4-SC are lower than those of patients with IgG4-SC/AIP. Patients with IgG4-SC who do not respond well at six months of treatment and who have progressed to cirrhosis before treatment are at significantly increased risk of adverse events.
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Bao W, Ma X, Xue Y, Zou X, Guo Y. Pregnancy-associated triple-negative breast cancer: A case report and literature review. Medicine (Baltimore) 2024; 103:e40059. [PMID: 39465823 PMCID: PMC11479494 DOI: 10.1097/md.0000000000040059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Accepted: 09/24/2024] [Indexed: 10/29/2024] Open
Abstract
RATIONALE The incidence of pregnancy-associated breast cancer (PABC) is relatively low, but it has been increasing in recent years. The onset of PABC causes serious harm to the fetus and the mother due to the unique physiological characteristics of pregnancy, which poses a particular challenge to clinicians. This article reports a case of pregnancy-associated triple-negative breast cancer and describes the patient characteristics and systematic treatment of this type of breast cancer. PATIENT CONCERNS A 33-year-old woman was admitted to hospital with a left breast mass that had appeared more than a year earlier. She was a second-time pregnant woman with a single live intrauterine fetus at 23 + 4 weeks of gestation. During the examination of the left breast, a 6 by 8 cm sized mass can be observed on the upper outer quadrant. DIAGNOSIS Pregnancy-associated triple-negative breast cancer. INTERVENTION The patient underwent a breast ultrasound which showed a left breast mass and the diagnosis was confirmed by a puncture biopsy of the left breast mass. The pregnancy was terminated after multidisciplinary discussion, taking into account the wishes of the patient and her family. After termination of the pregnancy, all treatments were given according to the standard triple-negative breast cancer (TNBC) treatment protocol. The patient was treated with neoadjuvant chemotherapy with epirubicin in combination with docetaxel (TE) in cycles of 21 days. After 3 cycles of TE, a modified radical mastectomy for left breast cancer was performed, and the appropriate radiotherapy and chemotherapy treatments were carried out in sequence. OUTCOMES After the surgery, the disease-free survival for the patient was 3 months until local metastases were diagnosed. Thus the radiotherapy and chemotherapy were carried out, and then the patient was in good general condition with no recurrence or metastases. LESSONS Clinicians need more research into the diagnosis, treatment and prognosis of PABC. Improving the rate of early diagnosis and using standardized and individualized comprehensive treatment plans will minimize fetal damage and improve survival and quality of life for patients.
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Dong Z, Xu Y, Liu S, Li G, Ye M, Ma X, Li S. Water uptake patterns and rooting depths of Tamarix ramosissima in the coppice dunes of the Gurbantünggüt Desert, China: a stable isotope analysis. PLANT BIOLOGY (STUTTGART, GERMANY) 2024; 26:1057-1066. [PMID: 39012225 DOI: 10.1111/plb.13695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 06/24/2024] [Indexed: 07/17/2024]
Abstract
Tamarix ramosissima has an important role in stabilizing sand dunes in desert ecosystems. Understanding the water use strategies of T. ramosissima is essential to understand its adaptations on coppice dunes. We utilized the stable isotopes δ2H and δ18O in soil water, groundwater, and xylem water to identify monthly differences in water sources. Additionally. we explored rooting depth using 2H2O as an artificial tracer. In May, T. ramosissima derived 75% of its water from shallow and middle soil layers. In July, it absorbed 90% water from middle and deep soil layers. In August and September, it acquired approximately 80% of its water from deep soil layers. The labelling using 2H as an artificial tracer indicated that the root system of T. ramosissima could reach depths >500 cm in the coppice dunes. 2H absorption was observed at depths of 100, 200, 300 and 400 cm. Soil water is the dominant water source for T. ramosissima in the coppice dunes because groundwater is at depths >30 m. The flexible water-use strategies of T. ramosissima enable it to effectively utilize different available water sources to adapt to the arid environment. These findings improve our understanding of water uptake patterns and drought adaptation strategies of T. ramosissima in the coppice dunes of desert ecosystems.
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Chin V, Chlap P, Finnegan R, Hau E, Ong A, Ma X, Descallar J, Otton J, Holloway L, Delaney GP, Vinod SK. Cardiac Substructure Dose and Survival in Stereotactic Radiotherapy for Lung Cancer: Results of the Multi-Centre SSBROC Trial. Clin Oncol (R Coll Radiol) 2024; 36:642-650. [PMID: 39097416 DOI: 10.1016/j.clon.2024.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 07/10/2024] [Accepted: 07/17/2024] [Indexed: 08/05/2024]
Abstract
BACKGROUND AND PURPOSE Stereotactic ablative body radiotherapy (SABR) is increasingly used for early-stage lung cancer, however the impact of dose to the heart and cardiac substructures remains largely unknown. The study investigated doses received by cardiac substructures in SABR patients and impact on survival. MATERIALS AND METHODS SSBROC is an Australian multi-centre phase II prospective study of SABR for stage I non-small cell lung cancer. Patients were treated between 2013 and 2019 across 9 centres. In this secondary analysis of the dataset, a previously published and locally developed open-source hybrid deep learning cardiac substructure automatic segmentation tool was deployed on the planning CTs of 117 trial patients. Physical doses to 18 cardiac structures and EQD2 converted doses (α/β = 3) were calculated. Endpoints evaluated include pericardial effusion and overall survival. Associations between cardiac doses and survival were analysed with the Kaplan-Meier method and Cox proportional hazards models. RESULTS Cardiac structures that received the highest physical mean doses were superior vena cava (22.5 Gy) and sinoatrial node (18.3 Gy). The highest physical maximum dose was received by the heart (51.7 Gy) and right atrium (45.3 Gy). Three patients developed grade 2, and one grade 3 pericardial effusion. The cohort receiving higher than median mean heart dose (MHD) had poorer survival compared to those who received below median MHD (p = 0.00004). On multivariable Cox analysis, male gender and maximum dose to ascending aorta were significant for worse survival. CONCLUSIONS Patients treated with lung SABR may receive high doses to cardiac substructures. Dichotomising the patients according to median mean heart dose showed a clear difference in survival. On multivariable analyses gender and dose to ascending aorta were significant for survival, however cardiac substructure dosimetry and outcomes should be further explored in larger studies.
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Ma X, Räisänen SE, Wang K, Amelchanka S, Giller K, Islam MZ, Li Y, Peng R, Reichenbach M, Serviento AM, Sun X, Niu M. Evaluating GreenFeed and respiration chambers for daily and intraday measurements of enteric gaseous exchange in dairy cows housed in tie-stalls. J Dairy Sci 2024:S0022-0302(24)01166-4. [PMID: 39343233 DOI: 10.3168/jds.2024-25246] [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: 06/01/2024] [Accepted: 08/20/2024] [Indexed: 10/01/2024]
Abstract
The objective of this study was to evaluate the GreenFeed (GF) and respiration chambers (RC) for daily and intraday measurements of the enteric gaseous exchange, as well as the metabolic heat production, lying behavior, and feed intake (FI) rate of dairy cows at these 2 respective housing conditions [tie-stall barn (TS) vs. RC] during the summer periods. Sixteen multiparous lactating dairy cows were recruited and arranged in a randomized complete block design with a baseline period established for each cow. Cows were given a basal diet (CON) for a baseline period of 7 d and were then fed a 3-nitrooxypropanol (3-NOP)-containing feed for the subsequent 26 d as experimental period. During both the baseline and the last 7 d of treatment period, gaseous exchanges of each animal were measured in the TS using GF for 8 6-hourly staggered measurements over 3 d, immediately followed by the measurement in RC for 2 d. Corresponding DMI, milk yield, and behavior parameters (e.g., lying behavior and FI rate) in TS and RC were recorded. The correlation coefficients of CH4 and H2 using raw data were 0.84 and 0.85, respectively. For all gases, correlation coefficients between GF and RC on individual cow level decreased when the marginal fixed effects (e.g., inhibitor and breed) were corrected by a mixed model. There were no differences in daily CH4 production or intensity between GF and RC (442 vs. 443 g CH4/d or 16.6 vs. 16.2 g CH4 /kg MY). However, greater CH4 yield was measured by GF than RC (19.0 vs. 17.8 g CH4/kg DMI), driven by a lower DMI (23.3 vs. 24.6 kg/d) when cows were housed in TS sampled by GF compared with cows being housed and sampled in RC. The correlations for CO2 production and O2 consumption were moderate and expected due to the variation associated with the mild heat stress condition during GF measurements in the TS (Thermal humidity index (THI) 56 vs. 68), as indicated by the reduced lying time (-2.1 h/d). At the intraday level, there was an interaction between techniques and hour-of-day for CH4 production, as indicated by the discrepancies in post-prandial CH4 emissions between techniques. In summary, this set of results showed that there were strong positive correlations for CH4 and H2 emissions between GF and RC based on individual cow data. However, such relationship should be interpreted with caution, given the data clustering resulting from the use of inhibitor 3-NOP. On treatment level, these 2 techniques detected similar inhibitor effect on the estimated daily CH4 emissions. The intraday patterns of CH4 and H2 production captured by GF provided a close approximation for those measured by RC. Nevertheless, potential underestimation may occur, especially following fresh feed delivery. For measuring CO2 production and O2 consumption, the GF captured similar intraday variations to those in the RC. However, the estimated daily production and consumption were not directly comparable, which was expected due to the variable thermal conditions during the summer. Further evaluations under the same weather conditions are warranted.
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Liao Y, Ma X, Deng S, Chen S, Li Y. [Overwork induces vascular endothelial barrier dysfunction in mice]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2024; 44:1814-1820. [PMID: 39505350 DOI: 10.12122/j.issn.1673-4254.2024.09.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/08/2024]
Abstract
OBJECTIVE To investigate the impact of overwork on vascular endothelial barrier function in mice. METHODS Thirty KM mice were randomized equally into control, overwork for 2 weeks (W2) group and 4 weeks (W4) group. In the latter two groups, the mice were subjected to continuous standing in water for 8 h followed by restraint for 3 h to simulate overwork on a daily basis for 2 and 4 weeks. After modeling, 4 mice from each group were intraperitoneally injected with Evans blue dye to assess vascular permeability. In the other 6 mice, serum IL-1β levels were measured using ELISA, and arterial tissues were collected for histological examination and detection of mRNA expressions of occludin, claudin-5, ZO-1, JAM-A and VE-cadherin; immunofluorescence assay was used to detect the protein expressions of claudin-5, ZO-1, VE-cadherin, and Syndecan-1. RESULTS The mice in W2 and W4 groups exhibited slower weight gain, hair loss, reduced activity, and significantly increased serum IL-1β levels. Vascular permeability was significantly increased in W4 group. In W2 group, the endothelial cells were swollen and dissociated, and the intima was rough and irregular; arterial intimal rupture was observed in W4 group. The mRNA expressions of occludin, claudin-5, ZO-1 and JAM-A in the arterial tissues were significantly increased in W2 group but decreased in W4 group, while VE-cadherin mRNA expression were reduced in both groups (P < 0.05). The protein expressions of claudin-5, ZO-1, VE-cadherin, and Syndecan-1 were all significantly reduced in W4 group. CONCLUSION Prolonged overwork can cause damage of the intercellular junction complexes in arterial endothelial cells and the endothelial glycocalyx to result in impaired barrier function and increased vascular permeability in mice.
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Huang QB, Li Z, Peng C, Guo HQ, Liu GX, Wang XH, Wang GX, Li XH, Xu JN, Wang BJ, Zhang X, Ma X. [Application value of domestic single-port robot in nephron sparing surgery]. ZHONGHUA YI XUE ZA ZHI 2024; 104:3323-3327. [PMID: 39266496 DOI: 10.3760/cma.j.cn112137-20240123-00171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/14/2024]
Abstract
Objective: To explore the application value of the domestic precision ®single-port robotic system in nephron sparing surgery. Methods: The clinical data of patients with renal masses underwent nephron sparing surgery using the domestic precision ®single-port robotic system at the PLA General Hospital, Gulou Hospital Affiliated to Nanjing University School of Medicine, Zhongnan Hospital of Wuhan University and the First Affiliated Hospital of Nanchang University from September to November 2023 were retrospectively included. Perioperative clinical data, pathological examination results, and postoperative complications were summarized. Results: A total of 12 patients were included, including 8 males and 4 females, with 26-75 (56±16) years. Body mass index (BMI) was (25.1±2.7) kg/m2. There were 6 cases on the left side and 6 case on the right side. The surgical approach was transabdominal in 9 cases and retroperitoneal in 3 case. The maximum diameter of the lesions was (2.7±0.7) cm, the warm ischemia time [M (Q1, Q3)] was 19 (15, 26) minutes, the surgical time was 180 (149, 216) minutes, and the intraoperative blood loss was 50 (28, 100) ml. Postoperative visual analogue scale (VAS) was (2.9±1.5) points. Postoperative pathology revealed malignant renal clear cell carcinoma in 9 cases, with nuclear grading of 3 cases for Grade 1, 3 cases for Grade 2, and 3 cases for Grade 3. Eight cases of pathological TNM staging were pT1aN0M0 and 1 case was pT3aN0M0, with no cancer at the resection margin. Three cases showed benign renal vascular smooth muscle lipoma. There were no postoperative blood transfusions and no complications such as fever, urine leakage and poor wound healing. Conclusion: The prliminary experience reveals that the domestic precision ®single-port laparoscopic robotic system has good clinical application value in urological nephron sparing surgery.
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Du P, Zhu K, Wang M, Sun Z, Tan J, Sun B, Sun B, Wang P, He G, Xiong J, Huang Z, Meng H, Sun C, Xie S, Wang B, Ge D, Ma Y, Sheng P, Ren X, Tao Y, Xu Y, Qin X, Allen E, Zhang B, Chang X, Wang K, Bao H, Yu Y, Wang L, Ma X, Du Z, Guo J, Yang X, Wang R, Ma H, Li D, Pan Y, Li B, Zhang Y, Zheng X, Han S, Jin L, Chen G, Li H, Wang CC, Wen S. Genomic dynamics of the Lower Yellow River Valley since the Early Neolithic. Curr Biol 2024; 34:3996-4006.e11. [PMID: 39146937 DOI: 10.1016/j.cub.2024.07.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 04/05/2024] [Accepted: 07/17/2024] [Indexed: 08/17/2024]
Abstract
The Yellow River Delta played a vital role in the development of the Neolithic civilization of China. However, the population history of this region from the Neolithic transitions to the present remains poorly understood due to the lack of ancient human genomes. This especially holds for key Neolithic transitions and tumultuous turnovers of dynastic history. Here, we report genome-wide data from 69 individuals dating to 5,410-1,345 years before present (BP) at 0.008 to 2.49× coverages, along with 325 present-day individuals collected from 16 cities across Shandong. During the Middle to Late Dawenkou period, we observed a significant influx of ancestry from Neolithic Yellow River farmers in central China and some southern Chinese ancestry that mixed with local hunter-gatherers in Shandong. The genetic heritage of the Shandong Longshan people was found to be most closely linked to the Dawenkou culture. During the Shang to Zhou Dynasties, there was evidence of genetic admixture of local Longshan populations with migrants from the Central Plain. After the Qin to Han Dynasties, the genetic composition of the region began to resemble that of modern Shandong populations. Our genetic findings suggest that the middle Yellow River Basin farmers played a role in shaping the genetic affinity of neighboring populations in northern China during the Middle to Late Neolithic period. Additionally, our findings indicate that the genetic diversity in the Shandong region during the Zhou Dynasty may be linked with their complex ethnicities.
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Ma X, Lu YQ, Zhao YX, Yu LS, Bai WP, Lai RC, E LJ. [Preliminary analysis of risk factors of tinnitus related to female menopause]. ZHONGHUA ER BI YAN HOU TOU JING WAI KE ZA ZHI = CHINESE JOURNAL OF OTORHINOLARYNGOLOGY HEAD AND NECK SURGERY 2024; 59:916-921. [PMID: 39289959 DOI: 10.3760/cma.j.cn115330-20240107-00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Objective: To investigate the possible pathogenesis and possible risk factors of tinnitus related to female menopause. Methods: From April 2016 to October 2016, 59 female patients with menopausal syndrome were diagnosed in the menopause comprehensive management clinic. Tinnitus and menopause questionnaires were conducted, based on whether having tinnitus, those patients were divided into two groups: tinnitus group and no tinnitus group. Age, body mass index (BMI), Kupperman menopausal index (KMI) score, follicle-stimulating hormone (FSH) level of patients in the two groups were analyzed. Menopausal symptoms, related medical history and possible related factors of tinnitus were statistically analyzed. Results: A total of 59 cases were collected, 22 of which were accompanied by tinnitus. The incidence of idiopathic tinnitus was 35.1% (20/57) because 2 cases of thyroid related tinnitus with clear etiology were removed. Complete data were obtained from 17 of 20 patients with idiopathic tinnitus and 26 of 37 patients without tinnitus. Age, BMI, menopause KMI score, hormone level, menopause symptoms and possible factors related to tinnitus were statistically analyzed between the two groups, and the incidence of headache was statistically different between the two groups (χ2=9.098, P=0.003), but no other factors were statistically significant(P>0.05). The severity of insomnia and tinnitus were further analyzed (χ2=2.841, P=0.417), and there was no significant difference between the two groups. Conclusion: Headache history may be one of the high risk factors for the occurrence of menopausal tinnitus.
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Zhang L, Yang YF, Ma X, Zhang YF, Wang Y. [Current research status of virus-like particle vaccine]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 2024; 58:1404-1414. [PMID: 39290024 DOI: 10.3760/cma.j.cn112150-20231123-00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Virus-like particles (VLPs) are self-assembled protein nanoparticles with repetitive antigen epitopes, which can stimulate immune response and do not contain viral genetic materials. VLPs has important research value and application potential in vaccine development, targeted drug delivery and bioengineering materials. In this review, the mechanism of VLPs vaccine induced immune responses is discussed. The existing VLPs expression systems are summarized. The research progress of VLPs vaccine in prevention and treatment of virus infection are summarized. This review provides general reference and guidance for the design and development of antiviral VLPs vaccine.
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Zheng C, Li J, Chen H, Ma X, Si T, Zhu W. Dual role of CD177 + neutrophils in inflammatory bowel disease: a review. J Transl Med 2024; 22:813. [PMID: 39223577 PMCID: PMC11370282 DOI: 10.1186/s12967-024-05539-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 07/25/2024] [Indexed: 09/04/2024] Open
Abstract
Inflammatory bowel disease (IBD) represents a group of recurrent chronic inflammatory disorders associated with autoimmune dysregulation, typically characterized by neutrophil infiltration and mucosal inflammatory lesions. Neutrophils, as the earliest immune cells to arrive at inflamed tissues, play a dual role in the onset and progression of mucosal inflammation in IBD. Most of these cells specifically express CD177, a molecule increasingly recognized for its critical role in the pathogenesis of IBD. Under IBD-related inflammatory stimuli, CD177 is highly expressed on neutrophils and promotes their migration. CD177 + neutrophils activate bactericidal and barrier-protective functions at IBD mucosal inflammation sites and regulate the release of inflammatory mediators highly correlated with the severity of inflammation in IBD patients, thus playing a dual role. However, mitigating the detrimental effects of neutrophils in inflammatory bowel disease remains a challenge. Based on these data, we have summarized recent articles on the role of neutrophils in intestinal inflammation, with a particular emphasis on CD177, which mediates the recruitment, transepithelial migration, and activation of neutrophils, as well as their functional consequences. A better understanding of CD177 + neutrophils may contribute to the development of novel therapeutic targets to selectively modulate the protective role of this class of cells in IBD.
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Ma X, Räisänen SE, Garcia-Ascolani ME, Bobkov M, He T, Islam MZ, Li Y, Peng R, Reichenbach M, Serviento AM, Soussan E, Sun X, Wang K, Yang S, Zeng Z, Niu M. Effects of 3-nitrooxypropanol (Bovaer10) and whole cottonseed on milk production and enteric methane emissions from dairy cows under Swiss management conditions. J Dairy Sci 2024; 107:6817-6833. [PMID: 38762115 DOI: 10.3168/jds.2023-24460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 03/29/2024] [Indexed: 05/20/2024]
Abstract
The objective of this study was to determine the potential effect and interaction of 3-nitrooxypropanol (3-NOP; Bovaer, DSM-Firmenich Nutrition Products Ltd.) and whole cottonseed (WCS) on lactational performance and enteric methane (CH4) emission of dairy cows. A total of 16 multiparous cows, including 8 Holstein Friesian (HF) and 8 Brown Swiss (BS; 224 ± 36 DIM, 26 ± 3.7 kg milk yield, mean ± SD), were used in a split-plot design, where the main plot was the breed of cows. Within each subplot, cows were randomly assigned to a treatment sequence in a replicated 4 × 4 Latin square design with 2 × 2 factorial arrangements of treatments with four 24-d periods. The experimental treatments were as follows: (1) control (basal TMR), (2) 3-NOP (60 mg/kg TMR DM), (3) WCS (5% TMR DM), and (4) 3-NOP + WCS. The treatment diets were balanced for ether extract, crude protein, and NDF contents (4%, 16%, and 43% of TMR DM, respectively). The basal diets were fed twice daily at 0800 and 1800 h. Dry matter intake and milk yield were measured daily, and enteric gas emissions were measured (using the GreenFeed System, C-Lock Inc.) during the last 3 d of each 24-d experimental period when animals were housed in tiestalls. There was no difference in DMI on treatment level, whereas the WCS treatment increased ECM yield and milk fat yield. No interaction of 3-NOP and WCS occurred for any of the enteric gas emission parameters, but 3-NOP decreased CH4 production (g/d), CH4 yield (g/kg DMI), and CH4 intensity (g/kg ECM) by 13%, 14%, and 13%, respectively. Further, an unexpected interaction of breed by 3-NOP was observed for different enteric CH4 emission metrics: HF cows had a greater CH4 mitigation effect compared with BS cows for CH4 production (g/d; 18% vs. 8%), CH4 intensity (g/kg milk yield; 19% vs. 3%), and CH4 intensity (g/kg ECM; 19% vs. 4%). Hydrogen production was increased by 2.85-fold in HF and 1.53-fold in BS cows receiving 3-NOP. Further, a 3-NOP × time interaction occurred for both breeds. In BS cows, 3-NOP tended to reduce CH4 production by 18% at approximately 4 h after morning feeding, but no effect was observed at other time points. In HF cows, the greatest mitigation effect of 3-NOP (29.6%) was observed immediately after morning feeding, and it persisted at around 23% to 26% for 10 h until the second feed provision, and 3 h thereafter, in the evening. In conclusion, supplementing 3-NOP at 60 mg/kg DM to a high-fiber diet resulted in 18% to 19% reduction in enteric CH4 emission in Swiss HF cows. The lower response to 3-NOP by BS cows was unexpected and has not been observed in other studies. These results should be interpreted with caution due to the low number of cows per breed. Finally, supplementing WCS at 5% of DM improved ECM and milk fat yield but did not enhance the CH4 inhibition effect of 3-NOP of dairy cows.
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