ObjectiveTo analyze the effects of the progestin-primed ovarian stimulation （PPOS） protocol on embryo euploidy rate and clinical pregnancy outcomes in infertile patients. MethodsWomen who underwent Preimplantation genetic testing for aneuploidy （PGT-A） cycles were selected as study participants （a total of 656 cycles and 3 081 blastocysts）. Participants were divided into two age groups （≤35 years and >35 years） and further stratified by ovarian stimulation protocol： the Progestin-Primed Ovarian Stimulation （PPOS） group （n=48 and 60， respectively）， the Luteal Phase Long Protocol （LP） group （n=160 and 57， respectively）， and the Gonadotropin-Releasing Hormone Antagonist Protocol （AP） group （n=220 and 111， respectively）. Baseline characteristics， ovarian stimulation outcomes， and embryo development parameters were compared among the three protocols within each age group. Additionally， clinical pregnancy outcomes of the first frozen embryo transfer （FET） cycle were compared. The primary outcome measure was the embryo euploidy rate. Results① In the ≤35 years age group， baseline follicle-stimulating hormone （bFSH） levels were significantly higher in the PPOS group compared to the LP and AP groups， and the bFSH/bLH ratio was significantly higher in the PPOS group than in the AP group （P < 0.05）. In the >35 years age group， bFSH levels in both the PPOS and AP groups were significantly higher than in the LP group （P < 0.05）.② In the ≤35 years group， there were no significant differences in the rates of metaphase II （MII） oocytes， 2-pronuclei （2 PN） zygotes， cleavage， 2 PN cleavage， blastocyst formation， high-quality embryos， or embryo euploidy between the PPOS group and either the LP or AP groups. However， the PPOS group showed significantly lower values for the following parameters compared to the other two groups： total oocytes retrieved， number of MII oocytes， number of 2 PN zygotes， number of cleaved embryos， number of 2 PN cleaved embryos， number of blastocysts formed， number of high-quality embryos， number of high-grade blastocysts， number of transferable embryos， number of cryopreserved embryos， number of biopsied blastocysts， number of euploid embryos， and the rate of obtaining at least one euploid embryo. In the >35 years group， no significant differences were observed among the PPOS， LP， and AP groups in the rates of MII oocytes， 2 PN cleavage， blastocyst formation， or in the number of euploid embryos， euploidy rate， and the rate of obtaining at least one euploid embryo. However， the PPOS group had significantly lower numbers of total oocytes retrieved， MII oocytes， 2 PN zygotes， cleaved embryos， 2 PN cleaved embryos， blastocysts formed， transferable embryos， and cryopreserved embryos compared to the LP group （P<0.05）. The high-quality embryo rate was significantly lower in the PPOS group than in the AP group （P<0.05）. The numbers of high-quality embryos， high-grade blastocysts， and biopsied blastocysts were significantly lower in the PPOS group than in both the LP and AP groups （P<0.05）. Notably， the 2 PN fertilization rate was significantly higher in the PPOS group than in the AP group， and the cleavage rate was significantly higher in the PPOS group than in both the LP and AP groups （P<0.05）.③ No significant differences were found among the three groups in the biochemical pregnancy rate， clinical pregnancy rate， live birth rate， early miscarriage rate， and late miscarriage rate following the first FET cycle. ConclusionCompared to the other two protocols， the PPOS protocol does not significantly affect embryo euploidy or clinical pregnancy rates. However， in freeze-all cycles with PGT-A， the PPOS protocol does not reduce the rate of chromosomally normal embryos but may decrease the total number of available embryos. It may not be the optimal choice for younger women， but it can be considered as a viable option for women of advanced maternal age.

Objective To gain insights into the biological characteristics of different populations of Culex tritaeniorhynchus within and around the Yellow Sea wetland from the perspective of the occurrence of resistance, we investigated the levels of resistance to deltamethrin and kdr gene mutation in the wetland and its peripheral areas. Methods Specimens were collected from Cx. tritaeniorhynchus populations at two monitoring sites in the Rare Bird National Nature Reserve and Tiaozi Ni Wetland Scenic Area, and also from two populations in Yancheng City and the Liuhe District of Nanjing, and the resistance of these mosquitoes to deltamethrin was determined using the CDC biotest bottle method. For each concentration of deltamethrin assessed, a random subset of exposed specimens was selected for amplification of the kdr gene fragment, followed by Sanger sequencing to identify and analyze resistance-associated mutations. Results The LC50 levels of deltamethrin among mosquitoes from the four populations in Luhe, Yancheng, the Rare Bird National Nature Reserve and the Tiaozi Ni Wetland Scenic Area were 2.048 5, 7.798 2, 3.473 3, and 17.695 5 mg/mL, respectively, with corresponding concentrations of deltamethrin ranging from 0.005 to 5.000,0.050 to 50.000,0.050 to 25.000 and 0.050 to 50.000 mg/mL, respectively. Furthermore, the ranges of the KT50 values were 11.76-107.43, 67.05-216.30,29.77-107.43 and 28.40-329.51 min; the 1-h knockdown rates were 34.58%-99.15%, 9.52%-43.80%, 55.09%-73.01%, and 10.09%-68.07%; and the 24-h mortality rates were 12.15%-67.52%,9.52%-79.56%,13.17%-82.21%, and 11.01%-78.99%, respectively. With respect to kdr gene mutation, we assayed a total of 63,70,59, and 57 mosquitoes for the four populations, for which we detected L1014F mutation frequencies of 14.29%, 35.00%, 20.34%, and 31.58%, respectively, with a majority of these mutations being heterozygous for resistance. In addition, five adult mosquitoes were identified has having synonymous mutations at site 1011[i. e. , AAT(asparagine)mutation to AAC(asparagine)]. Conclusions Our findings revealed the clear resistance of Cx. tritaeniorhynchus to deltamethrin in the Yancheng region of the Yellow Sea wetland, and the resistance phenotype and kdr frequency of Cx. tritaeniorhynchus in the wetland environment were comparable to those of Cx. tritaeniorhynchus in the wetland environment, thereby indicating that the resistance of different populations of Cx. tritaeniorhynchus was homogeneous under the pressure of different insecticide selection within and around the wetland. However, the underlying mechanisms need to be further studied.

Debates persist regarding the efficacy and safety of azvudine, particularly its real-world outcomes. This study involved patients aged ≥60 years who were admitted to 25 hospitals in mainland China with confirmed SARS-CoV-2 infection between December 1, 2022, and February 28, 2023. Efficacy outcomes were all-cause mortality during hospitalization, the proportion of patients discharged with recovery, time to nucleic acid-negative conversion (T _NANC), time to symptom improvement (T _SI), and time of hospital stay (T _HS). Safety was also assessed. Among the 5884 participants identified, 1999 received azvudine, and 1999 matched controls were included after exclusion and propensity score matching. Azvudine recipients exhibited lower all-cause mortality compared with controls in the overall population (13.3% vs. 17.1%, RR, 0.78; 95% CI, 0.67-0.90; P = 0.001) and in the severe subgroup (25.7% vs. 33.7%; RR, 0.76; 95% CI, 0.66-0.88; P < 0.001). A higher proportion of patients discharged with recovery, and a shorter T _NANC were associated with azvudine recipients, especially in the severe subgroup. The incidence of adverse events in azvudine recipients was comparable to that in the control group (2.3% vs. 1.7%, P = 0.170). In conclusion, azvudine showed efficacy and safety in older patients hospitalized with COVID-19 during the SARS-CoV-2 omicron wave in China.

Ischemia-reperfusion (I/R) injury following skin flap transplantation is a critical factor leading to flap necrosis and transplant failure. Antagonizing inflammatory responses and oxidative stress are regarded as crucial targets for mitigating reperfusion injury and enhancing flap survival. In this study, caffeic acid-vanadium metal polyphenol nanoparticles (CA-V NPs) were prepared for the treatment of skin flap ischemia and reperfusion. This study was conducted using a one-step method to prepare new types of CA-V NPs with uniform sizes and stable structures. In vitro, the CA-V NPs exhibited CAT-like and SOD-like activities and could effectively scavenge ROS, generate oxygen, and alleviate oxidative stress. In the H₂O₂-induced cellular oxidative stress model, CA-V NPs effectively reduced ROS levels and inhibited apoptosis through the XIAP/Caspase-3 pathway. In the cellular inflammation model induced by LPS combined with IFN-γ, CA-V NPs reprogrammed macrophage polarization toward the M2 phenotype and reduced inflammatory responses by reducing the expression of the chemokines CCL4 and CXCL2. In addition, animal experiments have shown that CA-V NPs can alleviate oxidative stress in skin flap tissues, inhibit apoptosis, promote angiogenesis, and ultimately improve the survival rate of skin flaps. CA-V NPs provide a new target and strategy for the treatment of flap I/R injury.

Notum, a negative feedback regulator of the Wnt signaling, has emerged as a promising target for treating glucocorticoid-induced osteoporosis (GIOP). This study showcases an efficient strategy for discovering the anti-Notum constituents from herbal medicines (HMs) as novel anti-GIOP agents. Firstly, a rapid-responding near-infrared fluorogenic substrate for Notum was rationally engineered for high-throughput identifying the anti-Notum HMs. The results showed that Bu-Gu-Zhi (BGZ), a known anti-osteoporosis herb, potently inhibited Notum in a competitive-inhibition manner. To uncover the key anti-Notum constituents in BGZ, an efficient strategy was adapted via integrating biochemical, phytochemical, computational, and pharmacological assays. Among all identified BGZ constituents, three furanocoumarins were validated as strong Notum inhibitors, while 5-methoxypsoralen (5-MP) showed the most potent anti-Notum activity and favorable safety profiles. Mechanistically, 5-MP acted as a competitive inhibitor of Notum via creating strong hydrophobic interactions with Trp128 and Phe268 in the catalytic cavity of Notum. Cellular assays showed that 5-MP remarkably promoted osteoblast differentiation and activated Wnt signaling in dexamethasone (DXMS)-challenged MC3T3-E1 osteoblasts. In dexamethasone-induced osteoporotic mice, 5-MP strongly elevated bone mineral density (BMD) and improved cancellous and cortical bone thickness. Collectively, this study constructs a high-efficient platform for discovering key anti-Notum constituents from HMs, while 5-MP emerges as a promising anti-GIOP agent.

Objective:To analyze the effect of zirconium-based pigments with different mass fractions on the colorimetric properties of fused deposition modeling (FDM) polyetheretherketone (PEEK) composites, and to investigate the feasibility of using these pigments for computer color matching of PEEK composites.Methods:Specimens were fabricated using FDM technology, comprising two control groups [Pure PEEK group, PEEK-TiO 2 group (PEEK compounded with 20% TiO 2)] and nine experimental groups based on the type of zirconium-based pigment (zirconium praseodymium yellow, zirconium iron red, zirconium vanadium blue) and mass fraction (0.1%, 0.5%, 1.0%). The experimental group specimens consisted of PEEK blended with 20% TiO 2 and the respective zirconium-based pigment. The spectral reflectance curve and chromaticity values of all specimens were measured using a spectrophotometer. The relationship between the chromaticity values of each colored PEEK composite in the experimental groups and the pigment mass fraction was determined. Shade guide tabs mimicking clinically used tooth shades were fabricated using a light-curing resin (Filtek Z350XT Body). The full-spectrum color matching method was employed to calculate the PEEK composite formulations (PEEK, 20% TiO 2, blends of the three zirconium-based pigments) required to match these target tooth shades. Verification group specimens based on these calculated recipes were then fabricated. The color difference between each verification group specimen and its corresponding target shade tab was calculated. Color differences between the target shade tabs and the two control groups (Pure PEEK, PEEK-TiO 2) were also calculated. Results:The spectral reflectance curves of PEEK composite specimens containing different types of zirconium-based pigments exhibited distinct characteristic features. The chromaticity values were significantly affected by the mass fraction of the same zirconium-based pigment. Based on computer color matching calculations, the color differences between the verification group specimens and the target shade tabs ranged from 1.59 to 14.55.Conclusions:This study demonstrates the feasibility of utilizing the three zirconium-based pigments (zirconium praseodymium yellow, zirconium iron red, zirconium vanadium blue) for full-spectrum computer color matching of PEEK-TiO 2 composites.

Objective:To analyze the epidemiological characteristics of the population receiving assisted reproductive technology (ART) therapy and the health status of their offspring in Shanghai from 2011 to 2020.Methods:Based on the birth cohort of the entire population in Shanghai, the proportion and trend changes of ART offspring in the birth cohort were analyzed. The characteristics of ART and naturally conceived populations, including household registration, education level, maternal age, and reproductive history, were examined. Additionally, the health status between ART offspring and naturally conceived offspring were compared.Results:From 2011 to 2020, a total of 70 729 ART offspring were born in Shanghai, accounting for 3.69% of the total births. In 2020, this proportion reached 7.79%. The ART conception rate for primiparous women was higher than that for multiparous women, with both showing upward trends and reaching 9.87% and 2.36%, respectively, in 2020. The ART conception rate was higher in women with higher education levels and local household registration than in those with lower education levels and non-local household registration. The incidence rates of preterm birth and low birth weight in ART singleton offspring were 7.76% and 4.82%, respectively, higher than the 4.69% and 2.87% in naturally conceived offspring, but no increasing trend was observed in naturally conceived offspring. Among twin and multiple newborns, the incidence rates of preterm birth and low birth weight were 56.98% and 46.82% for ART, lower than the 58.51% and 51.32% for natural conception.Conclusions:The difference in social and demographic characteristics was obvious in population receiving ART, suggesting that the differed demand of some people for ART therapy, and it is necessary to strengthen the construction of public health services and further expand the coverage and accessibility of ART services. With technological advancements, the rates of preterm birth and low birth weight remain relatively stable, and even decrease in twin and multiple newborns.

Objective To analyze the status of 2 649 suspected pertussis patients in Xi'an and the changes in laboratory diagnostic indi-cators.Methods 2 649 patients with suspected pertussis who visited the Second Affiliated Hospital of Xi'an Jiaotong University from June 2023 to May 2025 were collected as the research subjects.Nasopharyngeal swabs were collected from the patients,and pertussis nucleic acid was detected by polymerase chain reaction(PCR)-fluorescence probe method.Laboratory diagnostic indicators were an-alyzed.Results Among the 2 649 samples tested,250 were positive for pertussis nucleic acid,with a positive detection rate of 9.44%.The detection rate in male patients was 9.37%(127/1 356),and in female patients was 9.51%(123/1 293),with difference no was statis-tically significant between the two groups(χ2=0.019,P=0.894).There was a statistically significant difference in the positive detection rate among different age groups(χ2=46.473,P<0.05),with the highest positive detection rate in the 7～19 age group(14.98%).The prevalence of pertussis showed a seasonal characteristic with a peak from April to September.21.2%(53/250)of the positive patients were mixed infections.In the 1～14 age group,the white blood cell count(WBC),lymphocyte percentage(LYMP%),and lymphocyte count(LYMP#)in the pertussis infection group were higher than those in the Mycoplasma pneumoniae(MP)infection group(t=10.179,5.819,8.614)and the Respiratory syncytial virus(RSV)infection group(t=16.570,2.618,7.185),and the differences were statistically significant(all P<0.01),respectively.In the＞14 age group,the LYMP%and LYMP#in the pertussis infection group were higher than those in the MP infection group(t=3.275,2.319)and the RSV infection group(t=2.401,4.617),and the differences were statistically significant(all P<0.05),respectively.Conclusion The pertussis infection status in Xi'an area from 2023 to 2025 shows significant char-acteristics in terms of age,season and laboratory test results.It is necessary to further improve the pertussis surveillance system in this area,optimize the clinical diagnosis and treatment process and strengthen the vaccination work of pertussis vaccine.

Objective:To analyze the epidemiological characteristics of the population receiving assisted reproductive technology (ART) therapy and the health status of their offspring in Shanghai from 2011 to 2020.Methods:Based on the birth cohort of the entire population in Shanghai, the proportion and trend changes of ART offspring in the birth cohort were analyzed. The characteristics of ART and naturally conceived populations, including household registration, education level, maternal age, and reproductive history, were examined. Additionally, the health status between ART offspring and naturally conceived offspring were compared.Results:From 2011 to 2020, a total of 70 729 ART offspring were born in Shanghai, accounting for 3.69% of the total births. In 2020, this proportion reached 7.79%. The ART conception rate for primiparous women was higher than that for multiparous women, with both showing upward trends and reaching 9.87% and 2.36%, respectively, in 2020. The ART conception rate was higher in women with higher education levels and local household registration than in those with lower education levels and non-local household registration. The incidence rates of preterm birth and low birth weight in ART singleton offspring were 7.76% and 4.82%, respectively, higher than the 4.69% and 2.87% in naturally conceived offspring, but no increasing trend was observed in naturally conceived offspring. Among twin and multiple newborns, the incidence rates of preterm birth and low birth weight were 56.98% and 46.82% for ART, lower than the 58.51% and 51.32% for natural conception.Conclusions:The difference in social and demographic characteristics was obvious in population receiving ART, suggesting that the differed demand of some people for ART therapy, and it is necessary to strengthen the construction of public health services and further expand the coverage and accessibility of ART services. With technological advancements, the rates of preterm birth and low birth weight remain relatively stable, and even decrease in twin and multiple newborns.

Objective:To analyze the effect of zirconium-based pigments with different mass fractions on the colorimetric properties of fused deposition modeling (FDM) polyetheretherketone (PEEK) composites, and to investigate the feasibility of using these pigments for computer color matching of PEEK composites.Methods:Specimens were fabricated using FDM technology, comprising two control groups [Pure PEEK group, PEEK-TiO 2 group (PEEK compounded with 20% TiO 2)] and nine experimental groups based on the type of zirconium-based pigment (zirconium praseodymium yellow, zirconium iron red, zirconium vanadium blue) and mass fraction (0.1%, 0.5%, 1.0%). The experimental group specimens consisted of PEEK blended with 20% TiO 2 and the respective zirconium-based pigment. The spectral reflectance curve and chromaticity values of all specimens were measured using a spectrophotometer. The relationship between the chromaticity values of each colored PEEK composite in the experimental groups and the pigment mass fraction was determined. Shade guide tabs mimicking clinically used tooth shades were fabricated using a light-curing resin (Filtek Z350XT Body). The full-spectrum color matching method was employed to calculate the PEEK composite formulations (PEEK, 20% TiO 2, blends of the three zirconium-based pigments) required to match these target tooth shades. Verification group specimens based on these calculated recipes were then fabricated. The color difference between each verification group specimen and its corresponding target shade tab was calculated. Color differences between the target shade tabs and the two control groups (Pure PEEK, PEEK-TiO 2) were also calculated. Results:The spectral reflectance curves of PEEK composite specimens containing different types of zirconium-based pigments exhibited distinct characteristic features. The chromaticity values were significantly affected by the mass fraction of the same zirconium-based pigment. Based on computer color matching calculations, the color differences between the verification group specimens and the target shade tabs ranged from 1.59 to 14.55.Conclusions:This study demonstrates the feasibility of utilizing the three zirconium-based pigments (zirconium praseodymium yellow, zirconium iron red, zirconium vanadium blue) for full-spectrum computer color matching of PEEK-TiO 2 composites.