The PIF7 gene is a member of the bHLH family, playing a pivotal role in plant germination. However, its roles in tea plants (Camellia sinensis) remain largely unexplored. In this study, we cloned the phytochrome-interacting factor gene CsPIF7 to elucidate its role in the germination of tea plants. Subcellular localization analysis demonstrated that CsPIF7 was localized in the nucleus. Yeast one-hybrid and dual-luciferase reporter assays demonstrated that CsPIF7 directly bound to a specific region (7-321 bp) of the CsEXP promoter, thereby repressing the expression of CsEXP. These findings suggest that CsPIF7 may modulate the germination of tea plants by inhibiting the expression of CsEXP. Quantitative real-time PCR results showed that both CsPIF7 and CsEXP exhibited high expression levels in tea buds, with different expression patterns in response to abscisic acid (ABA) treatment. Furthermore, both CsPIF7 and CsEXP were upregulated under cold stress at 4 ℃, indicating their involvement in the cold response of tea plants. Taken together, these results suggest that CsPIF7 regulates CsEXP expression in an ABA-dependent manner, thereby influencing the germination of tea plants. This study provides both theoretical and experimental insights into the molecular mechanisms governing the germination of tea plants, laying the groundwork for further exploring the role of PIF7 in plant development and stress responses.
Camellia sinensis/metabolism* ; Gene Expression Regulation, Plant ; Plant Proteins/metabolism* ; Abscisic Acid/pharmacology* ; Germination/genetics* ; Basic Helix-Loop-Helix Transcription Factors/metabolism* ; Promoter Regions, Genetic ; Cold Temperature

Objective:To establish the method of bacterial endotoxin detection for raw materials and injections of paliperidone palmitate.Methods:Paliperidone palmitate was dissolved with tetrahydrofuran and polysorbate 20 as solvent,and then diluted with BET H2O.According to bacterial endotoxin test in Chinese Pharmacopoeia 2020 Vol general charpters 1143,methodology validation of chromogenic substrate method in bacterial endotoxin test was con-ducted and then the interference experiment of solubilizer was added.Results:Paliperidone palmitate did not pre-cipitate during the experimental process,and then diluted to 0.007 mg·mL-1 with BET H2O.There was no inter-ference for chromogenic substrate method,while the bacterial endotoxin recovery of the solubilizer does not interfere with endotoxin testing.Conclusion:The method established in this paper is suitable for bacteria endotoxin test of raw materials and injections of paliperidone palmitate.

Objective:To analyze the value of 18F-FDG PET/CT combined with MRI in the diagnosis and differential diagnosis of ductal carcinoma in situ (DCIS) and early stage invasive ductal carcinoma (IDC). Methods:From September 2019 to December 2023, 12 patients with DCIS (all females; age 36-67 years) and 34 patients with early stage IDC (all females; age 36-73 years) in Qingdao Central Hospital were retrospectively analyzed. The general clinical information, MRI features, and 18F-FDG PET/CT features of patients were analyzed. χ2 test, Fisher exact test, and Mann-Whitney U test were used to analyze the data. The independent predictors of DCIS were analyzed by logistic regression analysis. The value of different indicators in diagnosing DCIS was analyzed using ROC curves analysis, and Delong test was used to assess the differences among AUCs. Results:The differences in tumor metabolic volume (MTV; 18.55(10.90, 76.30) vs 4.00(2.00, 11.45)cm 3) and total lesion glycolysis (TLG; 44.85(25.30, 125.30) vs 9.40(6.68, 22.35)g) of breast lesion, enhancement pattern (non-mass enhancement (NME); 8/12 vs 29.4%(10/34)), lobulation sign (0/12 vs 58.8%(20/34)), and apparent diffusion coefficient (ADC; 1.33 (1.16, 1.63)×10 -3vs 1.08 (0.75, 1.28)×10 -3mm 2/s) between DCIS and early stage IDC groups were statistically significant ( Z values: from -3.91 to -2.56, χ2=5.17, all P<0.05). When differentiating DCIS from early stage IDC, NME (odds ratio ( OR)=36.50, 95% CI: 2.15-618.52, P=0.013), ADC ( OR=7.85, 95% CI: 1.11-55.46, P=0.044), and TLG ( OR=1.06, 95% CI: 1.02-1.11, P=0.007) were independent predictors. The AUC of the three predictors combination was 0.941, which was higher than those of single predictors ( Z values: 2.00-2.80, P values: 0.005-0.046). Conclusion:The combination of 18F-FDG PET/CT and MRI improves the efficacy of differential diagnosis between DCIS and early stage IDC, thereby providing a basis for developing personalized treatment plans for patients.

Objective:To establish the method of bacterial endotoxin detection for raw materials and injections of paliperidone palmitate.Methods:Paliperidone palmitate was dissolved with tetrahydrofuran and polysorbate 20 as solvent,and then diluted with BET H2O.According to bacterial endotoxin test in Chinese Pharmacopoeia 2020 Vol general charpters 1143,methodology validation of chromogenic substrate method in bacterial endotoxin test was con-ducted and then the interference experiment of solubilizer was added.Results:Paliperidone palmitate did not pre-cipitate during the experimental process,and then diluted to 0.007 mg·mL-1 with BET H2O.There was no inter-ference for chromogenic substrate method,while the bacterial endotoxin recovery of the solubilizer does not interfere with endotoxin testing.Conclusion:The method established in this paper is suitable for bacteria endotoxin test of raw materials and injections of paliperidone palmitate.

Objective:To analyze the value of 18F-FDG PET/CT combined with MRI in the diagnosis and differential diagnosis of ductal carcinoma in situ (DCIS) and early stage invasive ductal carcinoma (IDC). Methods:From September 2019 to December 2023, 12 patients with DCIS (all females; age 36-67 years) and 34 patients with early stage IDC (all females; age 36-73 years) in Qingdao Central Hospital were retrospectively analyzed. The general clinical information, MRI features, and 18F-FDG PET/CT features of patients were analyzed. χ2 test, Fisher exact test, and Mann-Whitney U test were used to analyze the data. The independent predictors of DCIS were analyzed by logistic regression analysis. The value of different indicators in diagnosing DCIS was analyzed using ROC curves analysis, and Delong test was used to assess the differences among AUCs. Results:The differences in tumor metabolic volume (MTV; 18.55(10.90, 76.30) vs 4.00(2.00, 11.45)cm 3) and total lesion glycolysis (TLG; 44.85(25.30, 125.30) vs 9.40(6.68, 22.35)g) of breast lesion, enhancement pattern (non-mass enhancement (NME); 8/12 vs 29.4%(10/34)), lobulation sign (0/12 vs 58.8%(20/34)), and apparent diffusion coefficient (ADC; 1.33 (1.16, 1.63)×10 -3vs 1.08 (0.75, 1.28)×10 -3mm 2/s) between DCIS and early stage IDC groups were statistically significant ( Z values: from -3.91 to -2.56, χ2=5.17, all P<0.05). When differentiating DCIS from early stage IDC, NME (odds ratio ( OR)=36.50, 95% CI: 2.15-618.52, P=0.013), ADC ( OR=7.85, 95% CI: 1.11-55.46, P=0.044), and TLG ( OR=1.06, 95% CI: 1.02-1.11, P=0.007) were independent predictors. The AUC of the three predictors combination was 0.941, which was higher than those of single predictors ( Z values: 2.00-2.80, P values: 0.005-0.046). Conclusion:The combination of 18F-FDG PET/CT and MRI improves the efficacy of differential diagnosis between DCIS and early stage IDC, thereby providing a basis for developing personalized treatment plans for patients.

Objective:To investigate the effect of Eriocitrin on the proliferation of esophageal cancer KYSE30 cells,and to explore its possible mechanism based on ferroptosis.Methods:Esophageal cancer KYSE30 cells were divided into 8 groups:the control group(conventional culture),RSL3 group(treated with 3 μmol/L ferroptosis inducer RSL3),Eriocitrin group(treated with 75 μmol/L Eriocitrin),Eriocitrin+Fer-1 group(treated with 5 μmol/L of ferroptosis inhibitor Fer-1 and 75 μmol/L Eriocitrin),Fer-1 group(treated with 5 μmol/L Fer-1 treatment),oe-NC group(transfected with blank vector control),oe-STAT3 group(transfected with STAT3 overexpression vector)and oe-STAT3+Eriocitrin group(transfected with STAT3 overexpression vector and then treated with 75 μmol/L Eriocitrin).Proliferation abilities of cells in each group were detected using CCK-8 assay,EdU incorporation assay and clone formation assay respectively.The levels of intracellular ferroptosis-related indicators were detected using the ELISA kits.Western blotting was used to detect the expression of STAT3/GPX4 pathway-related proteins.KYSE30 cell nude mouse subcutaneous transplanted tumor model was constructed to observe the effects of Eriocitrin and Fer-1 on the growth of transplanted tumors.Results:Eriodictyol could inhibit the proliferation and clone formation of KYSE30 cells,increase the levels of reactive oxygen species(ROS),malondialdehyde(MDA)and Fe2+,decrease the level of glutathione(GSH)(all P<0.05)and suppress the growth of transplanted tumors in nude mice.These effects could be reversed by Fer-1(P<0.05).Overexpression of STAT3 could abolish the inductive effect of eriodictyol on ferroptosis and its inhibitory effect on the STAT3/GPX4 pathway(P<0.05).Conclusion:Eriocitrin could induce ferroptosis in esophageal cancer KYSE30 cells by inhibiting STAT3/GPX4 signaling pathway and exert significant antitumor effects in esophageal cancer.

Objective To investigate the incidence rate,clinical characteristics,and prognosis of neonatal stroke in Shenzhen,China.Methods Led by Shenzhen Children's Hospital,the Shenzhen Neonatal Data Collaboration Network organized 21 institutions to collect 36 cases of neonatal stroke from January 2020 to December 2022.The incidence,clinical characteristics,treatment,and prognosis of neonatal stroke in Shenzhen were analyzed.Results The incidence rate of neonatal stroke in 21 hospitals from 2020 to 2022 was 1/15 137,1/6 060,and 1/7 704,respectively.Ischemic stroke accounted for 75％(27/36);boys accounted for 64％(23/36).Among the 36 neonates,31(86％)had disease onset within 3 days after birth,and 19(53％)had convulsion as the initial presentation.Cerebral MRI showed that 22 neonates(61％)had left cerebral infarction and 13(36％)had basal ganglia infarction.Magnetic resonance angiography was performed for 12 neonates,among whom 9(75％)had involvement of the middle cerebral artery.Electroencephalography was performed for 29 neonates,with sharp waves in 21 neonates(72％)and seizures in 10 neonates(34％).Symptomatic/supportive treatment varied across different hospitals.Neonatal Behavioral Neurological Assessment was performed for 12 neonates(33％,12/36),with a mean score of(32±4)points.The prognosis of 27 neonates was followed up to around 12 months of age,with 44％(12/27)of the neonates having a good prognosis.Conclusions Ischemic stroke is the main type of neonatal stroke,often with convulsions as the initial presentation,involvement of the middle cerebral artery,sharp waves on electroencephalography,and a relatively low neurodevelopment score.Symptomatic/supportive treatment is the main treatment method,and some neonates tend to have a poor prognosis.

Objective To compare the blood glucose control effect and safety between insulin degludec and insulin aspart and insulin aspart 30 in non-obese patients with type 2 diabetes mellitus(T2DM).Methods Non-obese patients with T2DM were divided into treatment group and control group according to different treatment methods.The control group was treated with insulin aspart 30,and the treatment group was treated with insulin degludec and insulin aspart.Pancreatic islet related indicators[fasting C-peptide(FCP)and 2-hour postprandial C-peptide(2 h CP)],blood glucose control effect[fasting blood glucose(FBG),2-hour postprandial blood glucose(2 h PG)and glycated hemoglobin(HbA1c)],serum 25-hydroxyvitamin D[25(OH)D]and the risk of hypoglycemia were compared between the two groups.Results There were 41 cases in treatment group and 39 cases in control group.After treatment,FCP levels in treatment group and control group were(0.84±0.09)and(1.07±0.14)nmol·L-1;2 h CP levels were(1.03±0.15)and(1.69±0.17)nmol·L-1;FBG levels were(5.46±0.57)and(6.18±0.67)mmol·L-1;2 h PG levels were(8.17±0.85)and(9.03±0.94)mmol·L-1;HbA1 c were(5.35±0.57)％and(6.47±0.68)％;25(OH)D levels were(26.33±2.75)and(20.54±2.17)nmol·L-1,all with significant difference(all P＜0.05).The incidence rates of non-severe hypoglycemia in treatment group and control group were 14.63％and 35.90％,with statistically significant difference(P＜0.05).The incidence rates of severe hypoglycemia in treatment group and control group were 9.76％and 12.82％;the incidence rates of nocturnal hypoglycemia were 19.51％and 17.95％,without statistically significant difference(all P＞0.05).Conclusion The overall therapeutic effect of insulin degludec and insulin aspart on non-obese patients with T2DM is better than that of insulin aspart 30.The former can effectively regulate blood glucose and pancreatic islet cell function,lower the risk of non-severe hypoglycemia.

Objective To study the bioequivalence of test and reference olmesartan tablet in Chinese healthy subjects after single dose under fasting and fed conditions.Methods A single-center,random,open,single-dose,two-preparations,double-period,crossover study was adopted.A total of 48 healthy adult male and female subjects(24 cases of fasting test and 24 cases of fed test)were included in the random crossover administration.Single oral dose 20 mg of test and reference were taken under fasting and postprandial conditions,respectively.Plasma concentration of olmesartan in plasma were determined by liquid chromatography tandem mass spectrometry.The main pharmacokinetic parameters were calculated by Phoenix WinNonlin 8.0 software.Results The main pharmacokinetic parameters of the test and reference preparations of olmesartan tablets in the fasting group were as follows:Cmax were(653.06±133.53)and(617.37±151.16)ng·mL-1,AUC0-t were(4 201.18±1 035.21)and(4 087.38±889.99)ng·mL-1·h,AUC0-∞ were(4 254.30±1 058.90)and(4 135.69±905.29)ng·mL-1·h.The main pharmacokinetic parameters of the test and reference preparations of olmesartan tablets in the postprandial group were as follows:Cmax were(574.78±177.05)and(579.98±107.74)ng·mL-1,AUC0-t were(3 288.37±866.06)and(3 181.51±801.06)ng·mL-1·h,AUC0-∞ were(3 326.11±874.26)and(3 242.01±823.09)ng·mL-1·h.Under fasting and postprandial conditions,the 90％confidence intervals of the main pharmacokinetic parameters of the test and reference preparations are both 80.00％-125.00％.Conclusion Under fasting and postprandial conditions,a single oral dose of test and reference preparations olmesartan tablets in Chinese healthy adult volunteers showed bioequivalence.

ObjectiveSodium hyaluronate (HA) was used as the research object to modify it with phenolic acid in order to obtain the molecular structure with better antioxidant activity or even new activity. MethodsIn this study, 5 kinds of phenolic acid-sodium hyaluronate was prepared by free radical-mediated grafting method, and the grafts with the highest grafting degree were selected to optimize the synthesis conditions. Then, grafts structure and physicochemical properties were analyzed. The grafts were characterized by IR, UV, ¹H NMR, FESEM and TGA spectra. The in vitro antioxidant capacity of grafts was determined by the scavenging ability of DPPH·, ABTS⁺· and O^2-·. ResultsAmong 5 kinds of phenolic acid-sodium hyaluronate, the grafting rate of ferulic acid-sodium hyaluronate copolymer (FA-HA) was highest , which was chosen as experimental sample in the following tests. Firstly, the reaction conditions were investigated and the highest grafting rate was (16.59±0.31) mg/g at the optimal preparation conditions. Then, FA-HA structure and physicochemical properties were analyzed. Data from UV, IR, ¹H NMR analyses, TGA showed that FA were successfully grafted to HA. Compared with HA, the results of gel permeation chrematography (GPC) showed that the molecular mass distribution ofFA-HA copolymer decreased from 34.4 to 31.5 ku, but the uniformity of molecular distribution was improved. FESEM results showed that the structure of copolymer exhibited a closely connected lamellar structure with a relatively smooth surface. TGA results showed that thermal stability of FA-HA had a little decline. The antioxidant performance in vitro results showed that, during 0.25-10 g/L, FA-HA can eliminate (83.76±4.86)% DPPH·, (76.95±5.06)% ABTS⁺· and (83.08±2.51)% O^2-· respectively at 10 g/L. which were higher than that of native HA and FA. ConclusionFA and HA were successfully grafted together by free radical grafting, and the grafted FA-HA had better antioxidant activity in vitro, which provided a theoretical basis for further research and development of phenolic acid-HA grafts.