Objective To analyze the genetic characteristics and variations of influenza A (H3N2) viruses in Ma'anshan from 2022 to 2024, and to provide a scientific basis for local influenza prevention and control. Methods From April 2022 to March 2024, influenza-like illness (ILI) specimens were collected from three national influenza surveillance sentinel hospitals in Ma’anshan. Samples positive for influenza by real-time PCR were subjected to virus culture and identification. A total of 40 representative A/H3N2 strains with hemagglutination titers ≥8 were selected for whole-genome sequencing. Genetic evolution, homology, amino acid variations, and glycosylation sites were analyzed. Results All H3N2 representative strains from the 2022–2023 influenza season belonged to clade 3C.2a1b.2a.1a.1, while those from the 2023–2024 season fell into clade 3C.2a1b.2a.2a.3a.1. The nucleotide and amino acid sequence similarities of HA and NA between the 40 representative strains and the vaccine strain A/Darwin/6/2021 were all above 97.35%. Compared with the vaccine strain, amino acid mutations were identified in antigenic sites A, B, C, and E, as well as in receptor-binding sites of the HA protein. An I222V substitution was detected in the NA protein. The HA protein contained four additional glycosylation sites compared to the vaccine strain, while the glycosylation pattern of the NA protein remained consistent. Conclusion No antigenic drift was observed in the influenza A/H3N2 viruses in Ma'anshan City from 2022 to 2024, but genetic changes such as branching variations, key amino acid substitutions, and an increase in HA glycosylation sites were observed. These findings underscore the importance of sustained molecular surveillance of local influenza viruses.

OBJECTIVE To investigate the mechanism by which Qiaobai cold compress solution （QBCS） improves acne vulgaris （AV） based on transcriptomics and animal experiments. METHODS Rats were randomly divided into a blank control group （ n ＝6） and a modeling group （ n ＝30）. AV models were established in the modeling group by topical application of oleic acid to the inner surface of both ears， combined with subcutaneous injection of Cutibacterium acnes suspension into the auricle. Successfully modeled rats were further divided into the model group， positive control group （Tretinoin cream， 0.045 g/kg）， and QBCS low-， medium-， high-dose groups [3.55， 7.11， 14.22 g/kg （calculated by the amount of crude drug） ] ， with 6 rats in each group. Rats in each d rug group were treated with the corresponding drugs once daily for 14 consecutive days. After the final administration， changes in the appearance of the ears and histopathological changes in the ear tissues were observed， and serum levels of inflammatory factors， including tumor necrosis factor-α （TNF-α）， interleukin-6 （IL-6） and IL-1β， were measured. Auricular tissues from the blank control group， model group and QBCS medium-dose group were collected for transcriptome sequencing. Differential expressed genes （DEGs） were screened and subjected to Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis， followed by validation using real-time quantitative polymerase chain reaction and Western blot assay. RESULTS Compared with the model group， rats in all QBCS groups showed alleviated auricular acne symptoms， with reduced epidermal thickening， sebaceous gland hyperplasia， and inflammatory cell infiltration. Serum levels of TNF-α （except for the QBCS low-dose group）， IL-6 （except for the QBCS low-dose group） and IL-1β were significantly decreased （ P ＜0.05）. A total of 590 DEGs were identified （blank control group vs. model group）， and 596 DEGs were identified （model group vs. QBCS medium-dose group）. Above DEGs （blank control group vs. model group） were mainly enriched in Toll-like receptor （TLR） and nuclear factor-kappa B （NF-κB） signaling pathways， etc. Validation experiments showed that， compared with model group， low-， medium- and high-dose of QBCS reduced， to varying degrees， the mRNA expression of TNF-α， TLR2， interferon-γ and CXC chemokine ligand 8 in the auricular tissues of AV rats， increased the mRNA expression of peroxisome-proliferator-activated receptor gamma and tumor protein 53， and inhibited the phosphorylation of NF-κB p65 protein as well as the expressions of TLR2 and myeloid differentiation primary response protein 88（MyD88） （ P ＜0.05）. CONCLUSIONS QBCS can alleviate auricular inflammation and skin lesions in AV rats. This effect may be related to inhibition of the TLR/MyD88/NF-κB signaling pathway， thereby suppressing the expression of downstream inflammatory factors such as TNF-α.

To investigate the efficacy and safety of glucocorticoids combined with cyclophosphamide (CTX) and rituximab (RTX) in elderly patients with anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis with renal involvement.

OBJECTIVE To evaluate the efficacy and safety of Hydromorphone hydrochloride extended-release tablets （HHERT） in the treatment of chronic cancer-related pain （CCRP） in real-world settings， and to explore the effectiveness and reasons for rotation patterns between HHERT and other opioid drugs （OOD）. METHODS Data were retrospectively collected from 142 CCRP patients receiving strong opioid therapy at Fujian Cancer Hospital from January to December 2025. Patients were divided into the continuous HHERT group and the drug rotation group based on medication status. The efficacy and incidence of adverse reactions were compared between the two groups. The drug rotation group was further subdivided into the OOD-HHERT group （rotated from OOD to HHERT） and the HHERT-OOD group （rotated from HHERT to OOD）. Dose conversion coefficients were compared with guideline recommendations， and pain relief status， rotation types and reasons for rotation were analyzed between the two subgroups. RESULTS In the 142 CCRP patients， 107 achieved pain relief， with an overall response rate of 75.35%. After 4 weeks of treatment， there was a statistically significant difference in efficacy between the continuous HHERT group and the drug rotation group （ P ＜0.05）. A total of 110 adverse reactions occurred in 86 patients， with an overall adverse reactions of 77.46%， there were no statistically significant differences between the continuos HHERT group and the drug rotation group in the incidence of drug adverse reactions （ P ＞0.05）. 99 experienced opioid rotation， with an overall rotation rate of 69.72%. The pain relief rates after rotation were 74.36% in the HHERT-OOD group and 73.33% in the OOD-HHERT group， indicating comparable efficacy （ P ＞0.05）. In 31 patients （31.31%）， the dose conversion coefficients did not conform to guideline recommendations. There was a significant difference in the distribution of rotation types between the two groups （ P ＜0.05）： the HHERT-OOD group was dominated by route of administration changes， while the OOD-HHERT group was dominated by unchanged route of administration. The proportion of rotations due to restricted route of administration and drug supply shortage was significantly higher in the HHERT-OOD group than that in the OOD-HHERT group （ P ＜0.05）； the proportion of rotations due to inadequate analgesic effect was significantly higher in the OOD-HHERT group than that in the HHERT-OOD group （ P ＜0.05）. CONCLUSIONS In real-world settings， both HHERT and opioid rotation strategies demonstrate favorable analgesic effects in the treatment of CCRP. Rotation patterns are primarily driven by practical factors such as inadequate analgesic effect and restricted route of administration. It is necessary to standardize dose conversion standards and indications for opioid rotation to improve individualized cancer pain management.

Objective To observe the impact factors of vascular heat sink effect during in vitro microwave ablation(MWA)of porcine lung.Methods Simulation models were established using in vitro porcine lung tissue blocks based on isobaric inflation with an air pump and cyclic perfusion of duck blood with a glass tube and peristaltic pump,etc.MWA was performed under 8 different combining conditions(vessel diameter of 3 or 5 mm,blood perfusion of 30 or 50 cm/s,as well as distance between vessel and ablation antenna of 5 or 10 mm)each for 3 times.The highest temperature TV on vessel side and TC on control side during MWA,and ablation depth DV on vessel side and DC on control side after MWA were recorded.Multi-factor linear regression equations were constructed based on simulated vessel diameters,blood perfusion and distance between vessel and ablation antenna,and the impact factors of|TC-TV|and|DC-DV|were screened,respectively.Results Simulated vessel diameter showed linear positive correlation with both|TC-TV|and|DC-DV|(both P＜0.001).Simulated distance between vessel and ablation antenna showed linear negative correlation with both|TC-TV|and|DC-DV|(both P＜0.001),and the latter had more obvious impact on vascular heat sink effect than the former.Meanwhile,no significant linear relationship was found between simulated blood perfusion and|TC-TV|nor|DC-DV|(both P＞0.05).Conclusion Simulated vessel diameter and distance between vessel and ablation antenna were both impact factors of vascular heat sink effect during in vitro MWA of porcine lung,and the latter was more influential,whereas simulated blood perfusion showed no significant impact on it.

Purpose To evaluate the differential diagnostic value of 5.0T MRI susceptibility-weighted imaging(SWI)in hepatocellular carcinoma(HCC)and mass-forming intrahepatic cholangiocarcinoma(MICC).Materials and Methods A total of 56 patients with HCC and 36 patients with MICC confirmed by pathology from March 2023 to November 2024 in Anhui Provincial Hospital were retrospectively enrolled.Two radiologists independently analyzed three features of the lesions,including the low-signal rims around the lesion,hemorrhage within the lesion,and the relationship between lesions and adjacent vessels,on the SWI sequence between the two groups,respectively,via inter-rater consistency analysis.These above features between the two groups were compared and contrasted them with those obtained from conventional MR plain and enhanced scans,respectively.For intralesional hemorrhages,the diagnostic value was quantified by calculating the internal tissue susceptibility signal.Results The radiologists showed good consistency in the low-signal rims,intratumoral hemorrhage as well as the relationship between the lesion and the blood vessel on the SWI in the HCC group and the MICC group(Kappa=0.802-0.929,all P<0.001).Compared with conventional MR plain,SWI significantly enhanced the detection rates of perilesional low-signal rims and intratumoral hemorrhage(χ2=89.409,46.210,both P<0.001).These findings were more prevalent in HCC patients.The internal tissue susceptibility signal grading showed that HCC predominantly exhibited grade 3,whereas MICC predominantly exhibited grade 1,with statistically significant differences(Z=-4.059,P<0.05).Additionally,compared with enhanced MRI,SWI demonstrated higher accuracy in diagnosing the relationship between lesions and blood vessels in both groups;however,these differences were not statistically significant(χ2=0.275,0.247,P=0.871,0.619).In the HCC group,the relationship between tumors and blood vessels was primarily characterized by compression and tumor thrombus formation,while in the MICC group,it was predominantly marked by invasive changes,including vessel encasement,stenosis or occlusion,with a statistically significant difference between the two groups(Z=-6.809,P<0.001).Conclusion SWI sequence of 5.0T MRI provides clear visualization of the internal and peripheral structures of HCC and MICC.It can accurately delineate the relationship between lesions and blood vessels without the need for contrast agents,offering significant clinical utility in differentiating these two conditions.

BACKGROUND:The re-injury rate of the anterior cruciate ligament continues to be high and the unclear relationship between neuromuscular function and biomechanical risk factors may be one of the reasons for poor injury prevention and rehabilitation.OBJECTIVE:To evaluate the biomechanics and neuromuscular function characteristics of the knee joint during landing movements after anterior cruciate ligament reconstruction,and to further explore the effects of muscle strength,proprioception,and dynamic postural control on the risk indicators of anterior cruciate ligament injury during landing maneuver.METHODS:Twenty-six male anterior cruciate ligament reconstruction patients and 26 healthy control males at the age of 18-35 years were recruited and randomized to undergo joint kinesthesia test,Y-balance test,and isometric muscle strength tests.Kinematic and kinetic data of the knee joints during single-legged jump landing tasks were collected using an infrared motion capture system and force plates.RESULTS AND CONCLUSION:(1)Compared with the healthy control group,patients after anterior cruciate ligament reconstruction demonstrated higher knee valgus angle(P=0.021),lower hamstring muscle strength(P＜0.001),lower quadriceps muscle strength(P＜0.001)and Y-balance anterior reach distance(P＜0.001),and worse knee flexion kinesthesia(P＜0.001)and extension kinesthesia(P=0.001).(2)The predictor variables of knee extension moment were quadriceps strength and knee flexion kinesthesia(R2=0.298,P=0.007).The predictor variable of knee varus and valgus angle was hamstring strength(R2=0.117,P=0.048).The predictor variable of knee internal and external rotation angle was the hamstring-to-quadriceps peak torque ratio(R2=0.134,P=0.037).(3)The results showed that after anterior cruciate ligament reconstruction,patients still had abnormal biomechanical action patterns and neuromuscular function defects in the frontal plane of the knee joint,and elevating the muscle strength of the hamstrings,avoiding excessive quadriceps muscle strength and enhancing the proprioception of the knee joint were helpful to improve the biomechanical patterns of the sagittal plane,frontal plane and horizontal plane of the knee joint and reduce the risk of anterior cruciate ligament injury during landing maneuvers.

Purpose To evaluate the differential diagnostic value of 5.0T MRI susceptibility-weighted imaging(SWI)in hepatocellular carcinoma(HCC)and mass-forming intrahepatic cholangiocarcinoma(MICC).Materials and Methods A total of 56 patients with HCC and 36 patients with MICC confirmed by pathology from March 2023 to November 2024 in Anhui Provincial Hospital were retrospectively enrolled.Two radiologists independently analyzed three features of the lesions,including the low-signal rims around the lesion,hemorrhage within the lesion,and the relationship between lesions and adjacent vessels,on the SWI sequence between the two groups,respectively,via inter-rater consistency analysis.These above features between the two groups were compared and contrasted them with those obtained from conventional MR plain and enhanced scans,respectively.For intralesional hemorrhages,the diagnostic value was quantified by calculating the internal tissue susceptibility signal.Results The radiologists showed good consistency in the low-signal rims,intratumoral hemorrhage as well as the relationship between the lesion and the blood vessel on the SWI in the HCC group and the MICC group(Kappa=0.802-0.929,all P<0.001).Compared with conventional MR plain,SWI significantly enhanced the detection rates of perilesional low-signal rims and intratumoral hemorrhage(χ2=89.409,46.210,both P<0.001).These findings were more prevalent in HCC patients.The internal tissue susceptibility signal grading showed that HCC predominantly exhibited grade 3,whereas MICC predominantly exhibited grade 1,with statistically significant differences(Z=-4.059,P<0.05).Additionally,compared with enhanced MRI,SWI demonstrated higher accuracy in diagnosing the relationship between lesions and blood vessels in both groups;however,these differences were not statistically significant(χ2=0.275,0.247,P=0.871,0.619).In the HCC group,the relationship between tumors and blood vessels was primarily characterized by compression and tumor thrombus formation,while in the MICC group,it was predominantly marked by invasive changes,including vessel encasement,stenosis or occlusion,with a statistically significant difference between the two groups(Z=-6.809,P<0.001).Conclusion SWI sequence of 5.0T MRI provides clear visualization of the internal and peripheral structures of HCC and MICC.It can accurately delineate the relationship between lesions and blood vessels without the need for contrast agents,offering significant clinical utility in differentiating these two conditions.

Functional constipation is a common functional gastrointestinal disorder with a multifactorial and incompletely understood pathogenesis.Recent studies have revealed that its development involves the interplay of multiple mechanisms,including neurogenic and myogenic dysfunction of the colon,reduction and impairment of interstitial cells of Cajal(ICCs),outlet obstruction,dysregulation of the gut-brain axis,immune activation,and gut microbiota imbalance.Slow-transit constipation is mainly associated with enteric neural abnormalities,disruption of ICC signaling,and inflammation,whereas outlet obstruction constipation often results from pelvic floor dysfunction and rectal hyposensitivity.Dysregulation of the gut-brain axis plays a central role,involving impaired central regulation,hormonal imbalance,and enhanced local immune response.Additionally,gut microbial metabolites such as short-chain fatty acids,bile acids,and methane affect colonic motility and inflammation.This review summarizes the current understanding and research progress on the pathogenesis of functional constipation,providing insights for mechanism-based and individualized therapeutic approaches.

Functional constipation is a common functional gastrointestinal disorder with a multifactorial and incompletely understood pathogenesis.Recent studies have revealed that its development involves the interplay of multiple mechanisms,including neurogenic and myogenic dysfunction of the colon,reduction and impairment of interstitial cells of Cajal(ICCs),outlet obstruction,dysregulation of the gut-brain axis,immune activation,and gut microbiota imbalance.Slow-transit constipation is mainly associated with enteric neural abnormalities,disruption of ICC signaling,and inflammation,whereas outlet obstruction constipation often results from pelvic floor dysfunction and rectal hyposensitivity.Dysregulation of the gut-brain axis plays a central role,involving impaired central regulation,hormonal imbalance,and enhanced local immune response.Additionally,gut microbial metabolites such as short-chain fatty acids,bile acids,and methane affect colonic motility and inflammation.This review summarizes the current understanding and research progress on the pathogenesis of functional constipation,providing insights for mechanism-based and individualized therapeutic approaches.