1.Effect of Modified Tuoli Xiaodusan on Patients After Perianal Abscess Surgery on STAT3/VEGF Pathway
Haoyang DU ; Yuan GAO ; Haiqi FU ; Jinling HE ; Jing ZHANG ; Yangyang YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(5):187-195
ObjectiveTo explore the clinical efficacy of oral administration of modified Tuoli Xiaodusan on postoperative patients with perianal abscess, and its effects on related inflammatory factors and signal transducers and activators of transcription protein 3 (STAT3)/vascular endothelial growth factor (VEGF) signaling pathways. MethodsFrom January 2023 to December 2023 in Inner Mongolia hospital of traditional Chinese medicine, 60 postoperative patients with perianal abscess who met the inclusion criteria were selected. They were divided into a treatment group and a control group using the random number table method, with 30 cases in each group. The control group received conventional treatment, while the treatment group received additional treatment with modified Tuoli Xiaodusan on the basis of the control group. The course of treatment in both groups was three weeks. On the day of operation and on the 7th, 14th and 21st day after operation, enzyme-linked immunosorbent assay (ELISA) was used to measure the expression levels of serum interleukin-1β (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α). Hematoxylin eosin (HE) staining was used to observe the pathological morphology of pathological tissue. Western blot was used to measure the levels of phosphorylated STAT3 (p-STAT3) and vascular endothelial growth factor (VEGF) proteins, and real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) was used to determine the expression level of VEGF mRNA. The clinical efficacy of the two groups was compared according to the wound pain, secretion volume score, and healing rate of patients on the 3rd, 7th, 14th, and 21st day after operation. ResultsThe total effective rate of the treatment group was higher than that of the control group (P<0.05). For intra-group comparison, the pain score of the control group decreased at each time period (P<0.05), and the healing rate increased (P<0.05). The secretion volume score decreased on the 14th and 21st days after operation (P<0.05). The pain score and secretion volume score of the treatment group decreased at each time period (P<0.05), and the healing rate increased (P<0.05). The levels of various inflammatory factors decreased in both groups (P<0.05). Compared with those on the surgical day, the levels of p-STAT3 and VEGF proteins in the wound tissue of the two groups were different on the 7th and 21st days after operation (P<0.05). There were significant differences in VEGF mRNA levels in wound tissue between the two groups at each time period (P<0.01). For inter-group comparison, on the 7th and 14th days after operation, the pain score in the treatment group was lower than that in the control group. On the 7th, 14th and 21st days after operation, the secretion volume scores and healing rate of the treatment group were better than those of the control group (P<0.05). The levels of various inflammatory factors in the treatment group were lower than those in the control group (P<0.05), and the decline rate was faster (P<0.05). On the 7th day after operation, the levels of p-STAT3, VEGF protein, and VEGF mRNA in the wound tissue of the treatment group were higher than those in the control group (P<0.05). HE staining showed that the inflammatory cell infiltration in the treatment group decreased faster. The cell arrangement was more orderly, and new blood vessel lumens were visible. There were no abnormalities in the safety observation indexes of all patients during the study period. ConclusionModified Tuoli Xiaodusan can relieve wound pain after perianal abscess surgery, reduce secretions, and improve wound healing rate. The mechanism may be reducing the levels of serum IL-1β, IL-6, and TNF-α, reducing the inflammatory response of the wound, upregulating the expression of p-STAT3 and VEGF proteins, and stimulating the STAT3/VEGF signaling pathway, thereby accelerating angiogenesis and promoting wound healing.
2.Evaluation of transdermal absorption of self-assembled nanoparticles of Huangqin decoction loaded with terbinafine
Chengying SHEN ; Yican HE ; Xiao CHENG ; Chaoying DU ; Hongyan MIN ; Baode SHEN ; Lingfei TONG
China Pharmacy 2026;37(2):180-185
OBJECTIVE To investigate the effect of Huangqin decoction (HQD)-based self-assembled nanoparticles (SAN) co-loaded with terbinafine (TBF) (TBF-HQD-SAN NPs) on the transdermal absorption of TBF. METHODS High-speed centrifugation combined with dialysis was used to separate HQD-SAN, and TBF-HQD-SAN NPs were obtained by loading TBF using the ultrasound magnetic stirring method; the particle size distribution, Zeta potential and polydispersity index (PDI) of the nanoparticle were characterized, and the encapsulation efficiency (EE) and drug loading (DL) of TBF were determined; using in vitro and in vivo transdermal experiments, the differences in transdermal performance between TBF-HQD-SAN NPs and TBF raw materials, as well as TBF and HQD-SAN physical mixture (TBF-HQD-SAN PM), were compared and analyzed. RESULTS TBF- HQD-SAN NPs were spherical with a particle size of (177.60±2.57) nm, a PDI of 0.197 4±0.007 9, and a Zeta potential of (-14.63±0.85) mV. The EE and DL of TBF were (99.49±0.71)% and (3.22±0.10)% , respectively. In vitro transdermal experiments, compared with TBF raw materials, the steady-state permeation rate (Jss) and skin retention of TBF-HQD-SAN NPs increased by 3.34 times and 27.56 times, respectively (P<0.05); compared with TBF-HQD-SAN PM, its Jss and skinretention were increased by 2.04 times and 7.44 times, respectively (P<0.05). In vivo transdermal experiments 69号) showed that, the area under the drug-time curve and the maximum concentration of TBF-HQD-SAN NPs increased by 2.13 times and 2.06 times respectively compared to TBF raw materials, and increased by 1.59 times and 1.65 times respectively compared to TBF-HQD-SAN PM (P<0.05). CONCLUSIONS TBF-HQD-SAN NPs can significantly enhance the in vitro and in vivo transdermal absorption efficiency and skin retention of TBF.
3.Study on the absorption-enhancing effect of self-assembled nanoparticles from Shaoyao gancao decoction
Xinling WEI ; Shuangchen ZHANG ; Nianzhan ZHANG ; Yican HE ; Chaoying DU ; Baode SHEN ; Chengying SHEN
China Pharmacy 2026;37(6):713-719
OBJECTIVE To investigate the effect and mechanism of self-assembled nanoparticles from Shaoyao gancao decoction (SGD-SAN) on the intestinal absorption behavior of its main active components. METHODS SGD-SAN was prepared and characterized. Using an in-situ single-pass intestinal perfusion model in rats, the absorption characteristics of five active components (albiflorin, paeoniflorin, liquiritin apioside, liquiritin, glycyrrhizic acid) from SGD-SAN in the jejunum and ileum were studied, with the absorption rate constant ( K a ) and apparent permeability coefficient ( P eff ) as indicators, and compared with free drugs. In the intestinal segment with optimal absorption, the effects of drug concentration and efflux transporter inhibitors (P-glycoprotein inhibitor verapamil, multidrug resistance-associated protein 2 inhibitor indomethacin, breast cancer resistance protein inhibitor reserpine) on the intestinal absorption characteristics of these components were examined. RESULTS The obtained SGD-SAN exhibited a spherical shape with uniform sizes, an average particle diameter of (155.57±2.65) nm, a polydispersity index of 0.34±0.03, and a Zeta potential of (-9.30±1.12) mV. The average total content of five active components, including albiflorin, was 12.26%, and remained unaffected by enzymatic degradation and intestinal physical absorption. Compared with the free drug group, the five active components in the SGD-SAN group exhibited higher absorption rates in the ileal segment, with significantly elevated K a and P eff values (except for the P eff value of glycyrrhizic acid in the ileal segment) ( P <0.05 or P <0.01). Their absorption demonstrated a concentration-dependent trend. In the free drug groups, the absorption of each component was regulated by corresponding inhibitors ( P <0.05 or P <0.01); whereas in the SGD-SAN groups, except for albiflorin and paeoniflorin, the absorption of the remaining components was not affected by the inhibitors ( P >0.05). CONCLUSIONS SGD-SAN significantly enhances the intestinal absorption efficiency of active components. The above absorption-enhancing effect may be related to the avoidance of efflux transporter influence and the presence of a mixed absorption mode.
4.Genetic analysis and reproductive intervention for 46 Chinese pedigrees affected with Hereditary multiple exostoses.
Lilan SU ; Xiao HU ; Jing DAI ; Zhengxing WAN ; Duo YI ; Shuangfei LI ; Liang HU ; Yueqiu TAN ; Fei GONG ; Ge LIN ; Guangxiu LU ; Qianjun ZHANG ; Juan DU ; Wenbin HE
Chinese Journal of Medical Genetics 2026;43(4):253-258
OBJECTIVE:
To explore the genetic etiology of 46 Chinese pedigrees affected with Hereditary multiple exostoses (HME) and provide genetic counseling and reproductive intervention.
METHODS:
Whole-exome sequencing and Sanger sequencing were carried out on 87 patients from the 46 pedigrees to analyze the variants of EXT1 and EXT2 genes. Pathogenicity of the variants was assessed based on the guidelines from the American College of Medical Genetics and Genomics and Association for Molecular Pathology (ACMG/AMP). Prenatal diagnosis and preimplantation genetic testing (PGT) were provided for couples with identified pathogenic mutations. This study was approved by the Medical Ethics Committee of the hospital (Ethics No.: LL-SC-SG-2014-010).
RESULTS:
In total 17 and 22 pathogenic variants were respectively identified in the EXT1 and EXT2 genes, among which 5 EXT1 and 12 EXT2 variants were unreported previously. Three patients with no family history were found to harbor de novo variants of the EXT1 gene. Twenty nine couples had opted for PGT or underwent prenatal diagnosis following natural conception, and 17 healthy babies were born.
CONCLUSION
This study has clarified the genetic etiology of 45 HME pedigrees and identified 17 novel variants, which has enriched the mutational spectrum of the EXT1 and EXT2 genes. Reproductive intervention through PGT and prenatal diagnosis have prevented the recurrence of HME in these families.
Humans
;
Female
;
Male
;
Pedigree
;
Exostoses, Multiple Hereditary/diagnosis*
;
N-Acetylglucosaminyltransferases/genetics*
;
Adult
;
Exostosin 1
;
Asian People/genetics*
;
Genetic Testing
;
Exostosin 2
;
Mutation
;
China
;
Prenatal Diagnosis
;
Pregnancy
;
Genetic Counseling
;
Preimplantation Diagnosis
;
Exome Sequencing
;
East Asian People
5.Surveillance of Oncomelania hupensis snails following interruption of schistosomiasis transmission in Yunnan Province
Siqi NING ; Yi DONG ; Chunhong DU ; Lifang WANG ; Yun ZHANG ; Yuhe HE ; Hua JIANG ; Jiayu SUN ; Chunqiong CHEN ; Jiaqi YAN ; Jihua ZHOU ; Zongya ZHANG ; Hongqiong WANG ; Meifen SHEN ; Jing SONG
Chinese Journal of Schistosomiasis Control 2026;38(2):200-206
Objective To investigate the distribution characteristics of Oncomelania hupensis snails in Yunnan Province fol-lowing interruption of schistosomiasis transmission, so as to provide the evidence for assessing the risk of schistosomiasis transmission and scientifically formulating the schistosomiasis surveillance program. Methods According to the requirements of the National Schistosomiasis Surveillance Scheme (2020 Edition), O. hupensis snail surveillance data were collected from 18 schistosomiasis-endemic counties (cities, districts) in Yunnan Province from 2020 to 2024, including area of snail survey, area of snail habitats, area of re-emerging snail habitats, number of frames surveyed, number of frames with O. hupensis snails, number of O. hupensis snails captured, and number of living snails, and the occurrence of frames with snails and mean density of living snails were calculated. Changes in snail status over the 5-year period from 2020 to 2024 and the differences in snail distributions specified by epidemic intensity, environmental type, and vegetation type were analyzed. Results The areas of snail survey increased from 1 727.96 hm2 in 2020 to 3 894.45 hm2 in 2024 (peak) across 18 schistosomiasis-endemic counties (cities, districts) in Yunnan Province during the period from 2020 through 2024. The areas of snail habitats increased from 70.36 hm2 in 2020 to a peak in 2023 (172.04 hm2), followed by a reduction to 132.36 hm2 in 2024, and the areas of re-emerging snail habitats increased from 42.71 hm2 in 2020 to a peak in 2022 (78.43 hm2), followed by a reduction to 40.21 hm2 in 2024. The occurrence of frames with snails and mean density of living snails increased from 1.24% (3 025/244 404) and (0.033 2 ± 0.038 7) snails/0.1 m2 in 2020 to peaks at 2.03% (6 231/307 563) and (0.066 9 ± 0.068 4) snails/0.1 m2 in 2023, followed by reductions to 1.04% (5 829/559 941) and (0.032 6 ± 0.057 7) snails/0.1 m2 in 2024, respectively. There was a significant difference in the occurrence of frames with snails over the 5-year study period (χ2 = 1 962.95, P < 0.05), and the occurrence of frames with snails reduced by 48.71% in 2024 relative to in 2023 (χ2 = 1 411.05, P < 0.005); however, there was no significant difference in the mean density of living snails over the 5 years (H = 5.310, P > 0.05). There were significant differences in the occurrence of frames with snails (χ2 = 481.27, P < 0.05) and mean density of living snails (H = 6.872, P < 0.05) in schistosomiasis-endemic areas with different epidemic intensities. The occurrence of frames with snails (χ2 = 25.32 and 38.70, both P values < 0.017) and mean density of living snails (Z = 28.55 and 49.96, both P values < 0.017) were higher in schistosomiasis transmission-interrupted and eliminated areas with snails than in schistosomiasis-eliminated areas without snails, and the occurrence of frames with snails (χ2 = 453.54, P < 0.017) and mean density of living snails (Z = −56.97, P < 0.017) were higher in schistosomiasis-eliminated areas with snails than in schistosomiasis transmission-interrupted areas with snails. O. hupensis snails were mainly distributed in paddy fields, dry farmlands and ditches; however, the occurrence of frames with snails (13.40%, 424/3 164) and mean density of living snails [(0.252 8 ± 0.158 7) snails/0.1 m2] were higher in ponds/weirs than in other types of environments (both P values < 0.05). Rice, dry farmland crops and weeds were main vegetations in which O. hupensis snails were distributed, and the occurrence of frames with snails (2.29%, 7 111/310 140) and mean density of living snails [(0.072 3 ± 0.018 9) snails/0.1 m2] were higher in weeds than in other types of environments (both P values < 0.05). Conclusions O. hupensis snails have been effectively controlled in Yunnan Province following implementation of integrated schistosomiasis control measures; however, there are still risk factors for schistosomiasis transmission, including reduced attention to schistosomiasis control and snail re-emergence. Improved control efforts and surveillance system construction and timely identification of risk factors of snail status and timely management are recommended to ensure the achievement of the target of schistosomiasis elimination as scheduled.
6.Mechanism of Action of Modified Tongluo Tangtai Formula in Improving Myelin Damage in Diabetic Peripheral Neuropathy Based on Wnt/β-catenin Signaling Pathway
Zhigang HE ; Mingzhu CHEN ; Jialu BAI ; Chunguang XIE ; Lian DU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(14):247-258
ObjectiveThis paper aims to explore the action and molecular mechanism of modified Tongluo Tangtai Formula(MTLTT) on myelin damage in diabetic peripheral neuropathy (DPN) based on network pharmacology and in vitro experiments. MethodsThe chemical components of the MTLTT were retrieved from the Traditional Chinese Medicine Systems Pharmacology (TCMSP) database and literature, and the component targets were collected from the SwissTargetPrediction database. The targets of DPN were collected from the GeneCards, OMIM, Disgenet, and GEO databases. Gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) enrichment analyses were performed using the Metascape database, and a network diagram was constructed using Cytoscape software. The binding actions of core components with glycogen synthase kinase 3 beta (GSK-3β) and β-catenin were analyzed by Autodock Vina. An in vitro DPN model was established by high glucose-induced Schwann cells and dorsal root ganglion cells (SCs/DRGs). The ultrastructural morphological changes of SCs and DRGs were observed by scanning electron microscope(SEM), and the expressions of myelin-associated glycoprotein (MAG) and myelin basic protein (MBP) were detected by immunofluorescence staining. The mRNA and protein expression levels of MAG, MBP, myelin protein 0 (P0), peripheral myelin protein 22 (PMP22), and Wnt/β-catenin signaling pathway-related protein β-catenin, GSK-3β, Wnt family member 3α (Wnt3α), and Wnt inhibitory factor-1 (Wif-1) were detected by real-time polymerase chain reaction (Real-time PCR) and Western blot. ResultsNetwork pharmacology analysis revealed that MTLTT components may treat DPN via the Wnt signaling pathway, involving key proteins such as GSK-3β, β-catenin and Wif-1. The molecular docking results indicate that atropine, apigenin, baicalein, isoflavanone, and albiflorin have good binding activity with GSK-3β, and that all 13 core components have stable binding activity with β-catenin. Cell experiments showed that compared with the blank group, SCs and DRGs in the model group exhibited severe morphological and structural abnormalities such as disintegration, shrinkage and axonal rupture, while these abnormal changes were improved after MTLTT intervention. Immunofluorescence results indicated that the fluorescence intensity of MAG and MBP was markedly decreased in the model group relative to the blank group(P<0.01), while MTLTT treatment obviously upregulated the expression of MAG and MBP compared with the model group (P<0.01). Real-time PCR and Western blot assays revealed that the expression levels of myelin-related molecules MAG, MBP, P0 and PMP22 were significantly reduced in the model group (P<0.05,P<0.01), and MTLTT remarkably increased their expression levels (P<0.05). In the Wnt/β-catenin signaling pathway, the mRNA levels of GSK-3β, Wif-1 and Wnt3α were elevated and β-catenin mRNA expression was declined in the model group (P<0.01). Meanwhile, the protein expressions of GSK-3β and Wif-1 were upregulated, whereas those of Wnt3α and β-catenin were downregulated (P<0.01). Compared with the model group, MTLTT at different doses reduced the mRNA and protein levels of GSK-3β and Wif-1 to varying degrees (P<0.05), and distinctly enhanced the protein expression of Wnt3α and β-catenin(P<0.01). ConclusionMTLTT can alleviate high glucose-induced myelin damage. Its protective mechanism may promote myelin repair by upregulating the expression of MAG, MBP, P0 and PMP22, and the therapeutic effect is possibly associated with the activation of Wnt/β-catenin signaling pathway.
7.Clinical application of transperineal four-hole prostate puncture
Xudong JIA ; Haoxuan YANG ; Xin WANG ; Lei DU ; Ziyue MA ; Yan HE ; Mingxuan YANG ; Jinchun QI
Journal of Modern Urology 2026;31(3):268-271
Objective To compare the efficacy and safety of the transperineal four-hole prostate puncture with conventional transperineal prostate puncture. Methods A total of 91 patients undergoing transperineal prostate puncture at the Second Hospital of Hebei Medical University during Jan. 2024 and Jan. 2025 were enrolled. Based on the puncture methods, the patients were divided into the four-hole group(n=46)and conventional group(n=45). The four-hole group underwent four-hole puncture, while the conventional group received standardized parallel needle insertion. The operation time, intraoperative blood loss, pain score, positive biopsy rate, and complications were compared between the two groups. Results The intraoperative blood loss [(7.05±2.48)mL vs.(9.15±3.49)mL] and pain score [(2.33±1.55)vs.(3.02± 1.54)] of the four-hole group were significantly lower than those of the conventional group(P<0.05). No significant differences were observed in the positive biopsy rate [47.8%(22/46)vs. 46.7%(21/45)] or operation time [(18.83±2.49)min vs.(18.07±1.66)min](P>0.05). The total complication rate in the four-hole group was significantly lower than that in the conventional group [21.7%(10/46)vs. 42.2%(19/45), P<0.05]. Conclusion Compared with the conventional parallel needle insertion method, the four-hole puncture technique reduces the intraoperative blood loss, alleviates trauma severity and pain response, and reduces the complication rate.
8.Influence of voice training combined with active breathing and circulation technique on voice recovery after vocal cord polyp surgery.
Yajie GUAN ; Wen HE ; Xiaohui DU ; Ming WU
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2025;39(4):324-332
Objective:To explore the influence of voice training combined with active breathing and circulation techniques on voice recovery following vocal cord polyp surgery. Methods:A total of 110 patients who underwent vocal cord polyp surgery at our hospital from May 2022 to November 2023 were selected and randomly divided into a control group (n=55) and a combination group (n=55) using a random number table method. During the recovery period, both groups received dietary control and aerosol treatment. The control group participated in voice training, while the combination group received active breathing and circulation techniques in addition to voice training for 2 months. Morphological changes, voice acoustic indicators (Shimmer, Jitter, Maximum Phonation Time[MPT]), and the Voice Handicap Index (VHI) were compared between the two groups, and clinical efficacy was evaluated. Results:The combination group demonstrated higher clinical efficacy after training compared to the control group, with a statistically significant difference (P<0.05). The proportion of incomplete closure, abnormal mucosal wave, and supraglottic compensation decreased in both groups after training (P<0.05). However, there was no significant difference in the proportions of incomplete closure and abnormal mucosal wave between the two groups (P>0.05). Notably, the proportion of patients with supraglottic compensation in the combination group was lower than in the control group (P<0.05). After training, the Shimmer and Jitter values decreased in both groups, with the combination group exhibiting lower values (P<0.05). Conversely, the MPT values increased in both groups, again with higher values in the combination group (P<0.05). Additionally, after training, the functional, physiological, and emotional scores of the VHI decreased in both groups, with the scores in the combination group lower than those in the control group, demonstrating statistical significance (P<0.05). Conclusion:Voice training combined with active breathing and circulation techniques has a beneficial effect on recovery following vocal cord polyp surgery. This combined approach significantly improves vocal cord morphology and acoustic indices, alleviates voice disorders, and enhances overall voice recovery.
Humans
;
Vocal Cords/surgery*
;
Polyps/surgery*
;
Voice Training
;
Male
;
Female
;
Voice Quality
;
Laryngeal Diseases/surgery*
;
Voice
;
Middle Aged
;
Adult
;
Respiration
9.Optineurin restrains CCR7 degradation to guide type II collagen-stimulated dendritic cell migration in rheumatoid arthritis.
Wenxiang HONG ; Hongbo MA ; Zhaoxu YANG ; Jiaying WANG ; Bowen PENG ; Longling WANG ; Yiwen DU ; Lijun YANG ; Lijiang ZHANG ; Zhibin LI ; Han HUANG ; Difeng ZHU ; Bo YANG ; Qiaojun HE ; Jiajia WANG ; Qinjie WENG
Acta Pharmaceutica Sinica B 2025;15(3):1626-1642
Dendritic cells (DCs) serve as the primary antigen-presenting cells in autoimmune diseases, like rheumatoid arthritis (RA), and exhibit distinct signaling profiles due to antigenic diversity. Type II collagen (CII) has been recognized as an RA-specific antigen; however, little is known about CII-stimulated DCs, limiting the development of RA-specific therapeutic interventions. In this study, we show that CII-stimulated DCs display a preferential gene expression profile associated with migration, offering a new perspective for targeting DC migration in RA treatment. Then, saikosaponin D (SSD) was identified as a compound capable of blocking CII-induced DC migration and effectively ameliorating arthritis. Optineurin (OPTN) is further revealed as a potential SSD target, with Optn deletion impairing CII-pulsed DC migration without affecting maturation. Function analyses uncover that OPTN prevents the proteasomal transport and ubiquitin-dependent degradation of C-C chemokine receptor 7 (CCR7), a pivotal chemokine receptor in DC migration. Optn-deficient DCs exhibit reduced CCR7 expression, leading to slower migration in CII-surrounded environment, thus alleviating arthritis progression. Our findings underscore the significance of antigen-specific DC activation in RA and suggest OPTN is a crucial regulator of CII-specific DC migration. OPTN emerges as a promising drug target for RA, potentially offering significant value for the therapeutic management of RA.
10.Engineered platelet-derived exosomal spheres for enhanced tumor penetration and extended circulation in melanoma immunotherapy.
Jian ZHAO ; Xinyan LV ; Qi LU ; Kaiyuan WANG ; Lili DU ; Xiaoyuan FAN ; Fei SUN ; Fengxiang LIU ; Zhonggui HE ; Hao YE ; Jin SUN
Acta Pharmaceutica Sinica B 2025;15(7):3756-3766
Cells and exosomes derived from them are extensively used as biological carrier systems. Cells demonstrate superior targeting specificity and prolonged circulation facilitated by their rich array of surface proteins, while exosomes, due to their small size, cross barriers and penetrate tumors efficiently. However, challenges remain, cells' large size restricts tissue penetration, and exosomes have limited targeting accuracy and short circulation times. To address these challenges, we developed a novel concept termed exosomal spheres. This approach involved incorporating platelet-derived exosomes shielded with phosphatidylserine (PS) and linked via pH-sensitive bonds for drug delivery applications. The study demonstrated that, compared with exosomes, the exosomal spheres improved blood circulation through the upregulation of CD47 expression and shielding of phosphatidylserine, thereby minimizing immune clearance. Moreover, the increased expression of P-selectin promoted adhesion to circulating tumor cells, thereby enhancing targeting efficiency. Upon reaching the tumor site, the hydrazone bonds of exosome spheres were protonated in the acidic tumor microenvironment, leading to disintegration into uniform-sized exosomes capable of deeper tumor penetration compared to platelets. These findings suggested that exosome spheres addressed the challenges and offered significant potential for efficient and precise drug delivery.

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