ObjectiveTo investigate the migration and distribution characteristics of chemical constituents in blood and hippocampal tissues before and after vinegar processing of Citri Reticulatae Pericarpium Viride（CRPV）， and to explore the potential material basis and mechanisms underlying their regulatory effects on emotional disorders by comparing the effects of raw and vinegar-processed products of CRPV. MethodsUltra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry（UPLC-Q-TOF-MS/MS） was employed to characterize and identify the chemical constituents of raw and vinegar-processed products of CRPV extracts， as well as their migrating components in blood and hippocampal tissues after oral administration. Reference standards， databases， and relevant literature were utilized for compound annotation， with data processing performed using PeakView 1.2 software. Seventy male C57BL/6 mice were randomly divided into seven groups， including the blank group， model group， diazepam group（2.5 mg·kg^-1）， raw CRPV low/high dose groups（0.6， 1.2 g·kg^-1）， and vinegar-processed CRPV low/high dose groups（0.6， 1.2 g·kg^-1）， with 10 mice per group. Except for the blank group， all other groups underwent chronic restraint stress（2 h·d^-1） for 20 d. Each drug-treated group received oral administration at the predetermined dose starting 10 d after modeling， with a total treatment duration of 10 d. Following model-based drug administration， mice underwent open-field， forced swimming， and elevated plus maze tests. After anesthesia with isoflurane， whole brains were collected from each group of mice， and hippocampi were dissected. Reactive oxygen species（ROS） level in hippocampal tissues was quantified by enzyme-linked immunosorbent assay（ELISA）. Hematoxylin-eosin（HE） staining was used to observe hippocampal tissue morphology. Immunofluorescence was performed to detect neuronal nuclei（NeuN） and peroxisome proliferator-activated receptor alpha（PPARα） expressions in hippocampal tissue. Then， pharmacodynamic evaluations were conducted to assess the effects of raw and vinegar-processed CRPV on mood disorders， exploring the potential mechanisms. ResultsVinegar processing caused significant changes in the chemical composition of CRPV， with 18 components showing increased relative content and 35 components showing decreased relative content. The primary changes occurred in flavonoid compounds， including 20 flavonoids， 20 flavonoid glycosides， 3 triterpenes， 3 phenolic acids， 1 alkaloid， and 6 other compounds. Twenty-one components were detected in blood（15 methoxyflavones， 4 flavonoid glycosides， and 2 phenolic acids）， with 17 shared between raw and vinegar-processed CRPV. Seven components reached hippocampal tissues（all common to both forms）. In regulating emotional disorders， Vinegar-processed CRPV exhibited superior antidepressant-like effects compared to raw products. HE staining revealed that both treatments improved hippocampal neuronal morphology， particularly in the damaged CA1 and CA3 regions. Immunofluorescence and ELISA analyses demonstrated that both raw and vinegar-processed CRPV significantly modulated NeuN and PPARα expressions in hippocampal tissue while alleviating oxidative stress induced by excessive ROS（P<0.05）. ConclusionThe chemical composition of CRPV undergoes changes after vinegar processing， but the migrating components in blood and hippocampus are primarily methoxyflavonoids. These components may serve as the potential material basis for activating the PPARα pathway， thereby negatively regulating ROS generation in the hippocampus， reducing oxidative stress， and promoting the development of NeuN-positive neurons. These findings provide experimental evidence for enhancing quality standards， pharmacodynamic material research， and active drug development of raw and vinegar-processed CRPV.

Objective:To investigate the impacts of the radiosensitivity of cell lines on a microdosimetric kinetic model (MKM) used in carbon-ion radiotherapy.Methods:The saturation-corrected specific energy ( ) of monoenergetic carbon ions was calculated using the Kiefer-Chatterjee (K-C) track structure model. Correction curve f(LET) was derived from experimental data on relative biological effectiveness (RBE) (RBE DSB-LET) defined based on the double-strand DNA break of the Chinese hamster ovary (CHO) and Fibroblast cell lines irradiated using carbon ions with varying linear energy transfer (LET) values. Then, based on the MKM, the D10-LET curves, as well as α and β databases, of the CHO and Fibroblast cell lines with varying radiosensitivity were determined. Results:Compared to the clinically applied MKM, the predicted D10 after correction while accounting for cell line radiosensitivity agreed better with experimental D10 values of the CHO and Fibroblast cell lines. Specifically, compared to experimental values in the literature, the D10 values calculated in the study and determined using the MKM showed mean squared errors (MSEs) of 0.04 and 0.71, for the CHO cell line and 0.35 and 0.55, respectively, for the Fibroblast cell line. For monoenergetic carbon ions with varying LET values, the calculated α and β values generally increased with cellular radiosensitivity. Conclusions:Incorporating cellular radiosensitivity into the MKM framework serves as a more specific method for RBE assessment while also providing a reference for advancing MKM applications and achieving the fine-scale calculations of RBE in carbon-ion radiotherapy.

This study investigated the regulatory effects of carvacrol on lipopolysaccharide(LPS)-induced inflammatory response and endoplasmic reticulum(ER)stress in bovine mammary epithe-lial cells using in vitro cell culture techniques.Western blot analysis revealed significantly elevated expression levels of NF-κB pathway-related proteins and ER stress marker proteins in mastitis samples compared to healthy mammary tissues(P＜0.05).Cells were divided into a blank control group and carvacrol(CAV)treatment groups with varying concentrations(50,100,250,500,750,1 000 μmol/L).After 24 hours of culture,cell proliferation was assessed using the CCK-8 assay.An inflammatory model was established by stimulating MAC-T cells(a bovine mammary epithelial cell line)with LPS(10 mg/L)for 12 h,followed by measurement of the transcriptional levels of inflammatory-related genes(IL-6,IL-1β,and TNFα).MAC-T cells were pretreated with low,medi-um,and high doses of CAV for 12 h before LPS stimulation.Molecular docking analysis was per-formed to examine the interaction between CAV and GRP78,a key ER stress protein.Real-time quantitative PCR(qPCR)was used to analyze the mRNA expression levels of inflammatory cyto-kines(IL-6,IL-1β,TNFα),while Western blot was employed to assess the expression levels of NF-κB pathway proteins(p-IκB,p-NF-κB p65)and ER stress-related proteins(p-PERK,p-IRE1α,ATF6,GRP78,CHOP).The results from Western blot and qPCR demonstrated that CAV alleviated LPS-induced inflammatory response and cellular damage by inhibiting the NF-κB signa-ling pathway and ER stress.

In recent years,the intensification of dairy farming has significantly improved production efficiency but has also led to a rise in the incidence of metabolic diseases.Conditions such as keto-sis,fatty liver,and hypocalcemia pose serious threats to dairy cattle health and productivity.These diseases not only profoundly affect individual physiological function but also impose considerable economic pressures and challenges on farm management.As research advances,exosomes have e-merged as a novel intercellular signaling molecule,showing unique potential in regulating dairy cattle's nutritional metabolism.Studies suggest that exosomes hold promise as biomarkers for dis-ease and can even serve as carriers for disease detection and prevention.Acting as a crucial mediator of intercellular communication,exosomes play an important role in modulating the metabolic processes of dairy cattle.This review aims to systematically explore the role of exosomes in bovine nutritional metabolism and to provide new perspectives and theoretical support for their potential as tools for diagnosing,treating,and preventing metabolic diseases in dairy cattle,thus advancing research and practice in this field.

Objective To propose a low-dose CT image denoising method based on an improved Corediff model to recover the detailed features of the image and enhance the image quality.Methods An RS-Corediff model was established by modifying the key component U-Net network of the Corediff model.Firstly,the residual module was introduced in the network input stage for feature extraction;secondly,a new downsampling module was designed in the U-Net network encoder,which learned the semantic information of the feature map by convolution and maintained the learning state during the downsampling process so as to fully extract the image features;thirdly,the feature splicing processing was used to further enhance the learning effect during the upsampling process of the U-Net network decoder;finally,the convolutional kernel size was modified to adjust the sensory field during the convolutional process of the whole U-Net network structure so as to obtain rich features.The RS-Corediff model was compared with the residual encoder-decoder convolutional neural network(RED-CNN)model and the Corediff model on the public dataset AAPM 2016 in order to verify its effectiveness for low-dose CT image denoising.Results The RS-Corediff model gained advantages over the RED-CNN and Corediff models with a peak signal-to-noise ratio(PSNR)of 41.269 8,structural similarity(SSIM)of 0.953 4 and root mean square error(RMSE)of 17.568 7.Conclusion The proposed method effectively preserves the texture and details of low-dose CT images during the denoising process to improve the overall quality of the images.[Chinese Medical Equipment Journal,2025,46(5):9-13]

Objective:To explore the mechanism of Shiwei Chaihu Shugan Powder in the treatment of breast hyperplasia using network pharmacology; To verify the mechanism of Shiwei Chaihu Shugan Powder in the treatment of breast hyperplasia through animal experiments.Methods:The active components and potential targets of Shiwei Chaihu Shugan Powder were searched in TCMSP and Uniprot databases. Breast hyperplasia genes were searched in GeneCards and OMIM databases. The intersection targets were obtained by online tool Venny, and the "drug-component-target" network was constructed by Cytoscape 3.8.2 software. The protein interaction (PPI) network was constructed using the String platform, and GO function and KEGG pathway enrichment analysis were performed using the DAVID annotation database. Molecular docking was performed using PDB, PubChem database, PyMOL 2.1 and AutoDockvina 1.2.5 software to predict the biological mechanism of Shiwei Chaihu Shugan Powder in the treatment of breast hyperplasia. Rats were divided into blank group, model group, tamoxifen group and Shiwei Chaihu Shugan Powder low-, medium- and high-dosage groups according to the random number table method, with 6 rats in each group. Except for the blank group, the other groups were prepared with the modified estrogen-progesterone-induced rat mammary hyperplasia model. Shiwei Chaihu Shugan Powder low-, medium- and high-dosage groups were intragastrically administered with Shiwei Chaihu Shugan Powder solution at 7.425 g/kg, 14.850 g/kg, and 29.700 g/kg respectively, while the tamoxifen group was intragastrically administered with 2.1 mg/kg tamoxifen. The blank group and the model group were intragastrically administered with the same volume of drinking water, once a day, for consecutive 28 d. The thickness of the mammary gland was measured by small animal ultrasound. The height and width of the nipples were measured by vernier calipers. The levels of serum E2 and P were detected by ELISA. The morphology of mammary tissue was observed by HE staining. The expressions of ERα, ERβ, SRC-1 and CBP/p300 proteins were detected by Western blot.Results:A total of 92 active components and 274 disease-drug intersection targets were screened out. GO functional enrichment analysis showed that Shiwei Chaihu Shugan Powder was closely related to positive regulation of gene expression, positive regulation of RNA polymerase Ⅱ promoter transcription, signal transduction, negative regulation of apoptosis process, response to heterogeneous stimulation, and regulation of hormone levels. KEGG enrichment analysis showed that the core targets might be related to NF-κB signaling pathway, MAPK signaling pathway, AGE-RAGE signaling pathway, PI3K/Akt signaling pathway, and regulating hormone levels. Molecular docking results showed that the core components had a good binding energy with the core target and a stable conformation. Compared with the model group, the thickness of the mammary gland in the tamoxifen group and Shiwei Chaihu Shugan Powder low-, medium- and high-dosage groups decreased ( P<0.01), the serum P level increased ( P<0.05), the expressions of ERα, SRC-1, and CBP/p300 proteins decreased ( P<0.01), and the expression of ERβ protein increased ( P<0.01); the height of the nipples in the Shiwei Chaihu Shugan Powder medium- and high-dosage groups and the tamoxifen group decreased ( P<0.01), and the serum E2 level increased ( P<0.05). Conclusion:Shiwei Chaihu Shugan Powder may play a role in the treatment of breast hyperplasia by regulating the levels of estrogen and related proteins.

Objective:To investigate the impacts of the radiosensitivity of cell lines on a microdosimetric kinetic model (MKM) used in carbon-ion radiotherapy.Methods:The saturation-corrected specific energy ( ) of monoenergetic carbon ions was calculated using the Kiefer-Chatterjee (K-C) track structure model. Correction curve f(LET) was derived from experimental data on relative biological effectiveness (RBE) (RBE DSB-LET) defined based on the double-strand DNA break of the Chinese hamster ovary (CHO) and Fibroblast cell lines irradiated using carbon ions with varying linear energy transfer (LET) values. Then, based on the MKM, the D10-LET curves, as well as α and β databases, of the CHO and Fibroblast cell lines with varying radiosensitivity were determined. Results:Compared to the clinically applied MKM, the predicted D10 after correction while accounting for cell line radiosensitivity agreed better with experimental D10 values of the CHO and Fibroblast cell lines. Specifically, compared to experimental values in the literature, the D10 values calculated in the study and determined using the MKM showed mean squared errors (MSEs) of 0.04 and 0.71, for the CHO cell line and 0.35 and 0.55, respectively, for the Fibroblast cell line. For monoenergetic carbon ions with varying LET values, the calculated α and β values generally increased with cellular radiosensitivity. Conclusions:Incorporating cellular radiosensitivity into the MKM framework serves as a more specific method for RBE assessment while also providing a reference for advancing MKM applications and achieving the fine-scale calculations of RBE in carbon-ion radiotherapy.

Objective:To analyze the correlation of monocyte/high density lipoprotein ratio(MHR),neutrophil/lymphocyte ratio(NLR),platelet/lymphocyte ratio(PLR)and bone density,bone metabolism markers in elderly essential hypertension with osteoporosis(OP)patients.Methods:This study was a retrospective study,198 elderly essential hypertension patients who were admitted in our hospital from January 2022 to June 2024 were selected.According to the patient's bone mass test results,patients were divided into normal bone mass group(n=79),osteopenia group(n=68)and OP group(n=51).MHR,NLR,PLR,bone density(left hip,left femoral neck and lumbar spine L1-L4)and bone metabolism markers were compared among three groups,the correlation of MHR,NLR,PLR and bone density,bone metabolism markers were analyzed by Pearson correlation.Results:MHR,NLR,PLR in normal bone mass group,osteopenia group and OP group increased in turn(P＜0.05).The left hip,left femoral neck and lumbar spine L1-L4 bone density in normal bone mass group,osteopenia group,OP group decreased in turn(P＜0.05).25-hydroxyvitamin D[25(OH)D]in normal bone mass group,osteopenia group and OP group decreased in turn,alkaline phosphatase(ALP)and parathyroid hormone(PTH)increased in turn(P＜0.05).MHR,NLR and PLR were negatively correlated with left hip bone density,left femoral neck bone density,lumbar spine L1-L4 bone density,25(OH)D and positively correlated with PTH and ALP(P＜0.05).Conclusion:The increase of MHR,NLR and PLR in elderly essential hypertension with OP patients can affect bone mineral density and bone metabolism.

Currently, the drug delivery system (DDS) based on nanomaterials has become a hot interdisciplinary research topic. One of the core issues is drug loading and controlled release, in which the key lever is carriers. Vaterite, as an inorganic porous nano-material, is one metastable structure of calcium carbonate, full of micro or nano porous. Recently, vaterite has attracted more and more attention, due to its significant advantages, such as rich resources, easy preparations, low cost, simple loading procedures, good biocompatibility and many other good points. Vaterite, gained from suitable preparation strategies, can not only possess the good drug carrying performance, like high loading capacity and stable loading efficiency, but also improve the drug release ability, showing the better drug delivery effects, such as targeting release, pH sensitive release, photothermal controlled release, magnetic assistant release, optothermal controlled release. At the same time, the vaterite carriers, with good safety itself, can protect proteins, enzymes, or other drugs from degradation or inactivation, help imaging or visualization with loading fluorescent drugs in vitro and in vivo, and play synergistic effects with other therapy approaches, like photodynamic therapy, sonodynamic therapy, and thermochemotherapy. Latterly, some renewed reports in drug loading and controlled release have led to their widespread applications in diverse fields, from cell level to clinical studies. This review introduces the basic characteristics of vaterite and briefly summarizes its research history, followed by synthesis strategies. We subsequently highlight recent developments in drug loading and controlled release, with an emphasis on the advantages, quantity capacity, and comparations. Furthermore, new opportunities for using vaterite in cell level and animal level are detailed. Finally, the possible problems and development trends are discussed.

Objective To develop a novel type of transparent simulation manikin as a surgical training model to meet the surgical treatment demand on the medical train.Methods A transparent manikin was developed with the steps of basic data collection,motherboard design and manufacture and module production and assembly.Firstly,basic data collection was carried out with reference to standardized human anatomy and parameters.Secondly,some software such as UG NX7.5 was used to construct the motherboard of the manikin.Finally,module production and assembly were performed with the materials of acrylic,transparent rubber,silicone and hydrogel and the technology of silicone infusion.Results The transparent manikin developed had its anatomy structure close to that of the real body and high visuality for its internal and external components,which simulated a variety of war wounds and thus could be integrated with the surgical training scenarios on the medical train effectively.Conclusion The transparent manikin developed is characterized by high visuality,modularity and blood flow,and meets the demands for surgical training on the medical train.[Chinese Medical Equipment Journal,2025,46(6):111-115]