1.Effects of di(2-ethylhexyl) phthalate on glucose homeostasis in rats due to impaired autophagy flux of islet β cells mediated by oxidative stress
Hongyang ZHOU ; Yuting HU ; Xue CHEN ; Yunqiang ZHOU ; Liping LI ; Ling LI ; Herong LIU
Journal of Environmental and Occupational Medicine 2025;42(6):674-683
Background Di(2-ethylhexyl) phthalate (DEHP) is the most prevalent environmental endocrine disruptor among phthalate acid esters (PAEs) worldwide. Previous studies have indicated that exposure to DEHP may disrupt glucose metabolism. Objective To investigate the impact of DEHP on glucose homeostasis in rats, focusing on oxidative stress-induced impairment of autophagy in islet β cells. Methods Forty male SD rats were randomly assigned to four groups, receiving DEHP doses of 0, 187, 375, and 750 mg·kg−1 for 12 weeks. Oral glucose tolerance (OGTT) and insulin tolerance tests (ITT) were conducted 24 h after the final exposure. Pancreatic microstructural alterations were assessed using hematoxylin and eosin (HE) staining and transmission electron microscopy (TEM). Commercial ELISA kits were employed to quantify the levels of insulin, adenosine triphosphate (ATP), and adenosine monophosphate (AMP) in rat serum, as well as the protein expression level of activated caspase-3 in pancreatic tissue. Additionally, commercial microplate kits were utilized to measure the concentration of reduced glutathione (GSH) in serum, the activity of superoxide dismutase (SOD) using water-soluble tetrazolium salt-1, the content of malondialdehyde (MDA) by thiobarbituric acid method, and the level of reactive oxygen species (ROS) in pancreatic tissue by chemical fluorescence method. Reverse transcription polymerase chain reaction (RT-PCR) was used to measure sequestosome1 (SQSTM1/p62), Beclin1, microtubule-associated protein 1 light chain 3 (LC3), and cysteinyl aspartate specific proteinase-8 (Caspase-8) mRNA levels. Western blot analysis was applied to detect the protein relative expression levels of p62, Beclin-1, LC3-I, LC3 II, AMPK, p-AMPK, mTOR, p-mTOR, ULK1, and Caspase-8. Results Compared to the 0 mg·kg−1 DEHP group, the 750 mg·kg−1 DEHP group exhibited a significant increase in fasting blood glucose levels at 2, 4, 6, and 12 weeks (P<0.05). The OGTT showed that, following high-glucose gavage, the 187 mg·kg−1 DEHP group had elevated blood glucose at 30 min (P<0.05), the 375 mg·kg−1 DEHP group showed increased glucose levels at 15, 30, and 180 min (P<0.05), and the 750 mg·kg−1 DEHP group exhibited elevated levels at 15, 30, 60, and 180 min (P<0.05). The 375 and 750 mg·kg−1 DEHP groups demonstrated significantly increased OGTT area under the curve (AUC) values (P<0.05). In contrast, ITT results indicated no significant differences in blood glucose levels or AUC among the DEHP exposure groups at all time points (P>0.05). Compared to the 0 mg·kg−1 DEHP group, the 750 mg·kg−1 DEHP group exhibited significantly higher HOMA-IR levels and markedly lower HOMA-ISI values (P<0.05). HE and TEM showed that in each DEHP exposure group, the number of islet cells decreased, the islet area reduced, and chromatin condensation occurred. The endocrine granules in the cytoplasm of islet β cells decreased, and there were varying degrees of widening of the nuclear membrane gap, flattening and expansion of the Golgi complex, and expansion of the endoplasmic reticulum. Ribosome separation was observed, and autophagosomes were visible. In the 375 and 750 mg·kg−1 DEHP groups, the mitochondria were deformed to varying degrees, and some cristae structures disappeared, presenting vacuolization. Moreover, the chromatin condensation in the nuclei was more severe in the 750 mg·kg−1 DEHP group. The serum SOD activity was significantly elevated in the 750 mg·kg−1 DEHP group (P<0.05). Both the 375 mg·kg−1 and 750 mg·kg−1 DEHP groups exhibited a significant increase in the relative ROS content in pancreatic tissue (P<0.05). In DEHP-treated groups, the MDA content increased (P<0.05), while the GSH content decreased (P<0.05). Additionally, in the 750 mg·kg−1 DEHP group, the AMP/ATP ratio in serum was significantly raised (P<0.05), and the expression of cleaved Caspase-3 protein in pancreatic tissue was also significantly increased (P<0.05). The relative mRNA levels of p62, Beclin-1, LC3, and Caspase-8 in the pancreatic tissue of rats exposed to DEHP were significantly elevated (P<0.05). The relative expression levels of p-AMPK/AMPK, p-ULK1/ULK1, and Beclin-1 proteins in the DEHP-treated groups were significantly increased (P<0.05). In the 375 mg·kg−1 and 750 mg·kg−1 DEHP treatment groups, the relative expression levels of p62, LC3 II/LC1, and Caspase-8 proteins were significantly increased (P<0.05), while the relative expression level of p-mTOR/mTOR was significantly decreased (P<0.05). Conclusion DEHP can disrupt glucose homeostasis by inducing oxidative stress, which subsequently activates autophagy via the ROS/AMPK/ULK1 pathway, impairing autophagic flux and promoting apoptosis of islet β cells, ultimately decreasing their function and number.
2. Mechanism of ellagic acid improving cognitive dysfunction in APP/PS double transgenic mice based on PI3K/AKT/GSK-3β signaling pathway
Li-Li ZHONG ; Xin LU ; Ying YU ; Qin-Yan ZHAO ; Jing ZHANG ; Tong-Hui LIU ; Xue-Yan NI ; Li-Li ZHONG ; Yan-Ling CHE ; Dan WU ; Hong LIU
Chinese Pharmacological Bulletin 2024;40(1):90-98
Aim To investigate the effect of ellagic acid (EA) on cognitive function in APP/PS 1 double- transgenic mice, and to explore the regulatory mechanism of ellagic acid on the level of oxidative stress in the hippocampus of double-transgenic mice based on the phosphatidylinositol 3-kinase/protein kinase B/glycogen synthase kinase-3 (PI3K/AKT/GSK-3 β) signaling pathway. Methods Thirty-two SPF-grade 6-month-old APP/PS 1 double transgenic mice were randomly divided into four groups, namely, APP/PS 1 group, APP/PS1 + EA group, APP/PS1 + LY294002 group, APP/PS 1 + EA + LY294002 group, with eight mice in each group, and eight SPF-grade C57BL/6J wild type mice ( Wild type) were selected as the blank control group. The APP/PS 1 + EA group was given 50 mg · kg
3.In Vitro and in Vivo Evaluation of Scutellarin-phospholipid Complex Nanoemulsion and Analysis of Its Activity in Ameliorating LPS-induced Vascular Endothelial Injury
Tian LUO ; Zhiyong HE ; Xiangjun MAO ; Xue LIU ; Jinggang HE ; Yuan ZHI ; Xiangchun SHEN ; Qianli XU ; Ling TAO
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(10):159-168
ObjectiveTo evaluate some properties of scutellarin-phospholipid complex nanoemulsion(SCU-PC-NE), such as release, cell uptake and tissue distribution, and to investigate its effect on ameliorating lipopolysaccharide(LPS)-induced vascular endothelial injury. MethodSCU-PC-NE was prepared by weighting SCU-PC, ethyl oleate, Kolliphor HS15, 1,2-propylene glycol(50, 400, 514.3, 85.7 mg), respectively. And the appearance of SCU-PC-NE was observed by transmission electron microscope, the average paticle size and Zeta potential were measured by nanopotential particle size analyzer. The cumulative release of SCU-PC-NE in vitro was measured by dynamic dialysis, thiazolyl blue(MTT) colorimetric assay was used to investigate the effect of SCU-PC-NE on the viability of human umbilical vein endothelial cells(HUVECs), the inverted fluorescence microscope and flow cytometry were used to investigate cell uptake of HUVECs by SCU-PC-NE in vitro using coumarin 6 as a fluorescent probe, the tissue distribution of DiR/SCU-PC-NE labeled by near infrared fluorescent dyes was obeserved by small animal in vivo imaging system. The inflammation injury model was established by co-incubation with LPS(1 mg·L-1) and HUVECs, the effect of SCU-PC-NE on the levels of interleukin(IL)-1β and IL-6 were determined by enzyme-linked immunosorbent assay(ELISA), 18 Kunming male mice were randomly divided into blank group, model group, blank preparation group(equivalent to high dose group), SCU group and SCU-PC-NE low and high dose groups(5, 10 mg·kg-1), 3 mice in each group, and the drug administration groups were administered once in the tail vein at the corresponding dose every 48 h, equal volume of normal saline was given to the blank group and the model group, and the drug was administered for 4 consecutive times. Except for the blank group, the endothelial inflammatory injury was induced by intraperitoneal injection of LPS(10 mg·kg-1) at 12 h before the last administration in each group. Hematoxylin-eosin(HE) staining was used to investigate the effect of SCU-PC-NE on the histopathological changes in the thoracic aorta of mice. ResultThe appearance of SCU-PC-NE displayed pale yellow milky light, mostly spherical with rounded appearance and relatively uniform particle size distribution, with the average particle size of 35.31 nm, Zeta potential of 7.23 mV, and the encapsulation efficiency of 75.24%. The cumulative release in vitro showed that SCU-PC-NE exhibited sustained release properties compared with SCU. The cell viability of SCU-PC-NE was >90% at a concentration range of 1.05-8.4 mg·L-1. The results of cellular uptake experiments showed that the cellular uptake ability of SCU-PC-NE was significantly enhanced when compared with the SCU group(P<0.01). Compared with normal mice, the results of tissue distribution showed that the fluorescence intensity of DiR/SCU-PC-NE was significantly enhanced in the spleen, kidney, brain and thoracic aorta of mice at different time points after intraperitoneal injection of LPS(P<0.05, P<0.01), especially in thoracic aorta. ELISA results showed that the levels of IL-1β and IL-6 in the model group were significantly increased when compared with the blank group(P<0.05, P<0.01), and compare with the model group, all administration groups significantly down-regulated IL-1β level, with the strongest effect in the SCU-PC-NE high-dose group(P<0.01), and all administration groups significantly down-regulated IL-6 level, with the strongest effect in the SCU-PC-NE low-dose group(P<0.05). Compare with the blank group, the results of HE staining showed that the endothelial cells were damaged, the elastic fibers were broken and arranged loosely in the model group, although similar vascular injury could be observed in the blank preparation group, SCU group and SCU-PC-NE low-dose group, the vascular endothelial damage was significantly reduced in the high-dose group of SCU-PC-NE, which had a better effect than that in the SCU group. ConclusionSCU-PC-NE can promote the uptake of drugs by endothelial cells and effectively enriched in the site of vascular endothelial injury caused by LPS, suggesting that it has a protective effect on vascular endothelial injury and is a good carrier of SCU.
4.The correlation of UGT1A1 gene polymorphism and unexplained neonatal hyperbilirubinemia in Dai ethnic group of Yunnan Province
Gaiyuan DUAN ; Ling LIU ; Yuchen LI ; Xue JIANG
Chinese Journal of Neonatology 2024;39(4):204-208
Objective:To study the correlation of uridine diphosphate glucuronosyl transferase 1A1(UGT1A1) gene polymorphism and neonatal hyperbilirubinemia among Dai ethnic group in Yunnan province.Methods:From January 2020 to December 2022, Dai neonates with unexplained neonatal hyperbilirubinemia admitted to three hospitals in Yunnan Province were prospectively enrolled into the hyperbilirubinemia group. Neonates hospitalized during the same period without hyperbilirubinemia were selected as the control group. The serum total bilirubin levels were measured and UGT1A1 gene sequencing was performed in all neonates. The differences of genotype frequency and allele frequency of UGT1A1 gene in the two groups were analyzed. Logistic regression analysis was used to analyze the effects of each mutation on hyperbilirubinemia among Dai neonates.Results:A total of 92 neonates were in the hyperbilirubinemia group and 86 in the control group. No significant differences existed between the two groups on following items: gender, age at admission, gestational age (GA), birth weight (BW), feeding pattern, white blood cell count (WBC) and hemoglobin level ( P>0.05).Three mutation loci were detected in the hyperbilirubinemia group (c.211G>A, c.1091C>T and c.1456T>G), with frequencies 45.7%, 3.3% and 2.2%, respectively. Two mutation loci were detected in the control group (c.211G>A and c.1091C>T), with frequencies 17.4% and 1.2%. Correlation analysis showed that c.211G>A frequency (45.7%) and A allele frequency (23.9%) in the hyperbilirubinemia group were significantly higher than the control group ( P<0.05). No significant differences existed in the frequencies of c.1091C>T and c.1456T>G between the two groups ( P>0.05). Logistic regression analysis showed that c.211G>A was risk factor of unexplained neonatal hyperbilirubinemia in Dai neonates ( OR=3.976, 95% CI 1.991-7.941). Conclusions:The most common mutation of UGT1A1 gene in Chinese Dai neonates with unexplained neonatal hyperbilirubinemia in Yunnan Province is c.211G>A, which increases the risk of hyperbilirubinemia.
5.Mechanism on Banxia Xiexintang Inducing Ferroptosis in Gastric Cancer Cells Based on Nrf2/GPX4 Signaling Pathway
Ling LI ; Yaxing LI ; Xue WANG ; Xiao QIU ; Wei GUO ; Hailiang HUANG ; Xijian LIU ; Tao HAN
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(6):10-19
ObjectiveTo observe the effect of Banxia Xiexintang (BXT) on the proliferation of human gastric cancer HGC-27, MKN-45, and AGS cells and its mechanism. MethodCell counting kit-8 (CCK-8) was used to detect the effects of different concentrations of BXT-containing serum (5%, 10%, and 20%) on the proliferation of HGC-27, MKN-45, and AGS cells. A mitochondrial membrane potential probe (TMRE) was used to detect the expression of mitochondrial membrane potential in cells. A kit was used to detect iron ion (Fe2+) content, lipid peroxide (LPO), and superoxide dismutase (SOD) activity. Western blot was used to detect the protein expression levels of glycogen synthase3β (GSK3β), phosphorylated GSK3β (p-GSK3β), nuclear factor E2 related factor 2 (Nrf2), and glutathione peroxidase 4 (GPX4). The real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) was used to detect the mRNA expression of member 11 of the cystine/glutamic acid reverse transporter solute vector family 7 (SLC7A11), member 2 of the heavy chain solute vector family 3 (SLC3A2), transferrin receptor 3 (TFRC), and tumor protein (TP)53. ResultCCK-8 results showed that BXT and capecitabine could significantly reduce the survival rate of three kinds of gastric cancer cells after treatment with drug-containing serum for 24 h (P<0.01). After 48 h of intervention with drug-containing serum, the survival rate of three kinds of gastric cancer cells was significantly decreased in both the capecitabine group and the BXT group compared with the blank group. The BXT group was dose-dependent, with 20% BXT having the most significant effect (P<0.01). In terms of biochemical indicators of ferroptosis, compared with the blank group, BXT and capecitabine significantly decreased the expression of mitochondrial membrane potential (P<0.01) and SOD activity (P<0.01) and significantly increased the contents of LPO and Fe2+ (P<0.01), so as to improve the sensitivity of gastric cancer cells to ferroptosis. In terms of the Nrf2/GPX4 pathway, compared with the blank group, the BXT group could reduce the protein expressions of p-GSK3β, Nrf2, and GPX4 (P<0.01) in gastric cancer cells and increase mRNA expressions of SLC7A11 and SLC3A2 (P<0.05). It could also increase the protein expression of GSK3β (P<0.01) and mRNA expression of TP53 and TFRC (P<0.05, P<0.01) in gastric cancer cells. Inhibition of the Nrf2/GPX4 pathway induces ferroptosis in gastric cancer cells. Compared with the capecitabine group, the 20% BXT group showed a more obvious effect. ConclusionBanxia Xiexintang can induce ferroptosis in gastric cancer cells HGC-27, MKN-45, and AGS by inhibiting the Nrf2/GPX4 pathway.
6.Expert opinions on operation rules of Morita therapy outpatient service
Jiangbo LI ; Zucheng WANG ; Yuhua CUI ; Yingzhi LU ; Weijie QU ; Haiyin ZHANG ; Fuqiang MAO ; Fengqing QIE ; Wanghong SHI ; Qinfeng ZHANG ; Lingyi PAN ; Ling ZHANG ; Jianzhong LI ; Guangcheng CUI ; Tongxian CHEN ; Xiuqing MA ; Wei RONG ; Jianjun ZHANG ; Qingfang ZHONG ; Yanchi ZHANG ; Boquan ZHANG ; Xinrui WANG ; Wenyou MA ; Qingtao REN ; Yongfa JING ; Huanzhong LIU ; Zhenjian YU ; Laitian ZHAO ; Tianming HAN ; Xue HAN
Chinese Mental Health Journal 2024;38(1):68-72
Morita therapy has been bom for more than 100 years.Inpatient Morita therapy is highly oper-able and easy to master.It can improve many refractory neuroses through four-stage treatment.But more neuroses are treated in outpatient clinics,and Morita therapy cannot be used in hospitalized patients.Therefore,the formula-tion of expert opinions on outpatient operations is particularly important.This paper is based on domestic and for-eign references,and after many discussions by domestic Morita therapy experts,and then drew up the first version of the expert opinions on operation of outpatient Morita therapy.Meanwhile the operation rule of Morita therapy in three stages of outpatient treatment was formulated:in the etiological analysis stage,under the theoretical guidance of Morita therapy,analyze the pathogenic factors,to improve treatment compliance and reduce resistance;during the operating stage,guide patients to engage in constructive and meaningful actions,realizing the achievement of letting nature take its course principle;in the cultivating character and enriching life stage,pay attention to positive infor-mation,expanding the scope and content of actions,improving the ability to adapt to complex life,and preventing recurrence caused by insufficient abilities.It will lay a foundation for the promotion of Morita therapy in domestic outpatient clinics,so that more patients with neurosis and other psychological diseases could receive characteristic Morita therapy treatment in outpatient clinics.
7.Discussion of the methodology and implementation steps for assessing the causality of adverse event
Hong FANG ; Shuo-Peng JIA ; Hai-Xue WANG ; Xiao-Jing PEI ; Min LIU ; An-Qi YU ; Ling-Yun ZHOU ; Fang-Fang SHI ; Shu-Jie LU ; Shu-Hang WANG ; Yue YU ; Dan-Dan CUI ; Yu TANG ; Ning LI ; Ze-Huai WEN
The Chinese Journal of Clinical Pharmacology 2024;40(2):299-304
The assessment of adverse drug events is an important basis for clinical safety evaluation and post-marketing risk control of drugs,and its causality assessment is gaining increasing attention.The existing methods for assessing the causal relationship between drugs and the occurrence of adverse reactions can be broadly classified into three categories:global introspective methods,standardized methods,and probabilistic methods.At present,there is no systematic introduction of the operational details of the various methods in the domestic literature.This paper compares representative causality assessment methods in terms of definition and concept,methodological steps,industry evaluation and advantages and disadvantages,clarifies the basic process of determining the causality of adverse drug reactions,and discusses how to further improve the adverse drug reaction monitoring and evaluation system,with a view to providing a reference for drug development and pharmacovigilance work in China.
8.Role of intestinal flora in hypertension complicated with osteoporosis
Mei-Long SI ; Hua JIN ; Min-Ke LIU ; Shuang-Fang LIU ; Bi-Shi LING ; Shang-Wen QI ; Xue-Li MA
The Chinese Journal of Clinical Pharmacology 2024;40(3):449-453
Hypertension and osteoporosis(OP)are common diseases in middle-aged and elderly people,and the number of patients with both diseases has gradually increased in recent years.Because the onset of the disease is hidden,it is easy to cause fractures and serious complications of heart,brain and kidney in the later stage,which not only seriously damages the quality of life of patients,but also increases the difficulty of clinical treatment.Therefore,it is particularly necessary to strengthen the research on this disease.More and more studies have found that the disorder of intestinal flora will lead to the occurrence of OP,while the intestinal flora of patients with hypertension is obviously out of balance.Therefore,this paper thinks that intestinal flora may be the key influencing factor of hypertension complicated with OP,and the imbalance of intestinal flora will lead to the imbalance of short-chain fatty acid metabolism,immune inflammatory reaction and increased sympathetic nerve activity,thus causing the imbalance of bone homeostasis and promoting the occurrence of OP.Therefore,it is suggested that regulating intestinal flora may be a new way to intervene hypertension complicated with OP.
9.Clinical trial of Morinda officinalis oligosaccharides in the continuation treatment of adults with mild and moderate depression
Shu-Zhe ZHOU ; Zu-Cheng HAN ; Xiu-Zhen WANG ; Yan-Qing CHEN ; Ya-Ling HU ; Xue-Qin YU ; Bin-Hong WANG ; Guo-Zhen FAN ; Hong SANG ; Ying HAI ; Zhi-Jie JIA ; Zhan-Min WANG ; Yan WEI ; Jian-Guo ZHU ; Xue-Qin SONG ; Zhi-Dong LIU ; Li KUANG ; Hong-Ming WANG ; Feng TIAN ; Yu-Xin LI ; Ling ZHANG ; Hai LIN ; Bin WU ; Chao-Ying WANG ; Chang LIU ; Jia-Fan SUN ; Shao-Xiao YAN ; Jun LIU ; Shou-Fu XIE ; Mao-Sheng FANG ; Wei-Feng MI ; Hong-Yan ZHANG
The Chinese Journal of Clinical Pharmacology 2024;40(6):815-819
Objective To observe the efficacy and safety of Morinda officinalis oligosaccharides in the continuation treatment of mild and moderate depression.Methods An open,single-arm,multi-center design was adopted in our study.Adult patients with mild and moderate depression who had received acute treatment of Morinda officinalis oligosaccharides were enrolled and continue to receive Morinda officinalis oligosaccharides capsules for 24 weeks,the dose remained unchanged during continuation treatment.The remission rate,recurrence rate,recurrence time,and the change from baseline to endpoint of Hamilton Depression Scale(HAMD),Hamilton Anxiety Scale(HAMA),Clinical Global Impression-Severity(CGI-S)and Arizona Sexual Experience Scale(ASEX)were evaluated.The incidence of treatment-related adverse events was reported.Results The scores of HAMD-17 at baseline and after treatment were 6.60±1.87 and 5.85±4.18,scores of HAMA were 6.36±3.02 and 4.93±3.09,scores of CGI-S were 1.49±0.56 and 1.29±0.81,scores of ASEX were 15.92±4.72 and 15.57±5.26,with significant difference(P<0.05).After continuation treatment,the remission rate was 54.59%(202 cases/370 cases),and the recurrence rate was 6.49%(24 cases/370 cases),the recurrence time was(64.67±42.47)days.The incidence of treatment-related adverse events was 15.35%(64 cases/417 cases).Conclusion Morinda officinalis oligosaccharides capsules can be effectively used for the continuation treatment of mild and moderate depression,and are well tolerated and safe.
10.Drug metabolism and excretion of14Cbirociclib in Chinese male healthy subjects
Quan-Kun ZHUANG ; Hui-Rong FAN ; Shi-Qi DONG ; Bin-Ke FAN ; Ming-Ming LIU ; Ling-Mei XU ; Li WANG ; Xue-Mei LIU ; Fang HOU
The Chinese Journal of Clinical Pharmacology 2024;40(14):2118-2123
Objective To evaluate the characteristics of the mass balance and pharmacokinetics of[14 C]birociclib in Chinese male healthy volunteers after a single oral administration.Methods This study used a 14 C labeled method to investigate the mass balance and biological transformation of birociclib in human.Subjects were given a single oral dose of 360 mg/50 pCi of[14 C]birociclib suspension after meals.The blood,urine,and fecal samples were collected at specified time points/intervals after administration.The radiation levels of 14 C labeled birociclib-related compounds in the blood,plasma,urine,and feces were analyzed using liquid scintillation counting.In addition,a combination of high-performance liquid chromatography and on-line/off-line isotope detectors was used to obtain radioactive isotope metabolite spectra of plasma,urine,and fecal samples,and high-resolution mass spectrometry was used to identify the main metabolites.Results A total of 6 healthy male subjects were enrolled in this study.The median peak time of radioactive components in plasma was 5.00 h and the average terminal elimination half-life was 43.70 h after administration.The radioactive components were basically excreted and cleared from the body within 288.00 hours after administration,and average cumulative recovery rate of radioactive drugs was(94.10±8.19)%.The radioactive drugs were mainly excreted through feces,accounting for(84.60±7.10)%of the dose of radioactive drugs administered.Urine was the secondary excretory pathway,accounting for 9.41%of the dose of radioactive drugs administered.Metabolic analysis indicated that the prototype drug was the main radioactive components in plasma samples.The main metabolites in plasma were RM4(XZP-5286),RM6(XZP-3584),and RM7(XZP-5736).The drugs were mainly cleared from the body in the form of prototype drugs and metabolites.In addition to prototype drugs,a total of 9 metabolites were identified and analyzed in plasma,urine,and fecal samples,all of which were phase 1 metabolites.The main metabolic and clearance pathways of drugs in the body were deethylation,diisopropylat ion,oxidation,etc.Conclusion After a single oral administration of[14C]birociclib suspension to healthy subjects,it was mainly cleared from the body in the form of prototype drugs and metabolites,with feces as the main excretory pathway and urine as the secondary excretory pathway.Drugs mainly undergo metabolic reactions in the body,such as deethylation,diisopropylation,and oxidation.The subjects were well tolerance after administration.

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