1.Integrated evidence chain (Eff-iEC) based effectiveness evaluation of a multifunctional traditional Chinese medicine formula: Taking Xiaoyao San as an example
Caiping HE ; Ye LUO ; Zhiqi LI ; Haocheng YANG ; Lu LIU ; Yingjie XU ; Xiaoyan CHEN ; Siqi HUANG ; Jincai WEN ; Xiaoyan ZHAN ; Zhaofang BAI ; Xu ZHAO ; Xiaohe XIAO
Science of Traditional Chinese Medicine 2026;4(1):96-103
The study focuses on the concept of multifunctional traditional Chinese medicine (TCM) formulas and aims to evaluate the efficacy of the classical formula Xiaoyao San (逍遥散). Study employs the integrated evidence chain (Eff-iEC) method to organize, integrate, and evaluate its therapeutic efficacy in treating different diseases with the same therapy, and to investigate the feasibility of using Eff-iEC to evaluate the multifunctionality of TCM formulas. The evaluation covered Xiaoyao San's therapeutic effects on depression, premenstrual syndrome, chronic hepatitis, irritable bowel syndrome, dyspepsia, and menopausal syndrome. Concurrently, the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) system was used for evaluation, and authoritative medical documents were incorporated to corroborate the recognition of Xiaoyao San within the medical community. Depression and menopausal syndrome received higher ratings than other conditions in the Eff-iEC, GRADE, and Medical Community Recognition assessments. The Eff-iEC evidence grade for Xiaoyao San was rated as "High" or above for chronic hepatitis, irritable bowel syndrome, dyspepsia, and menopausal syndrome. Premenstrual syndrome received a "Moderate +" rating. The GRADE evidence level was "Low-〇〇⨁⨁" for depression, premenstrual syndrome, and chronic hepatitis; "Moderate-〇⨁⨁⨁" for dyspepsia and menopausal syndrome; and "Very Low-〇〇〇⨁" for irritable bowel syndrome. Depression and menopausal syndrome had the highest inclusion frequency, appearing in all 4 categories. Premenstrual syndrome, chronic hepatitis, and dyspepsia are not recommended in Western medical guidelines, but they are included in TCM guidelines, the China National Basic Medical Insurance Drug List, and the China National Essential Drug List. Irritable bowel syndrome appears only in the China National Basic Medical Insurance Drug List and China National Essential Drug List. The evaluation results obtained using the Eff-iEC method align with Medical Community Recognition, providing an objective and comprehensive assessment of Xiaoyao San's efficacy. The findings suggest that Xiaoyao San has strong evidence for treating depression and menopausal syndrome. However, further experimental and clinical trials are needed to assess its efficacy in treating premenstrual syndrome, chronic hepatitis, irritable bowel syndrome, and dyspepsia. These results support the clinical efficacy and rational use of Xiaoyao San, expand the application scope of the Eff-iEC method, and offer valuable insights and methodological references for the comparative evaluation of multifunctional TCM formulas.
2.Disparities in unexpected antibody distribution and clinical features by frequency of cross-matching incompatibility
Danli CUI ; Bujin LIU ; Haiman ZOU ; Pengwei YIN ; Yun QING ; Huayou DAI ; Siqi WU ; Junhong YANG ; Xia HUANG
Chinese Journal of Blood Transfusion 2025;38(8):1063-1070
Objective: To investigate the clinical characteristics, the types of unexpected antibodies, and their impacts on immunological risks among patients with different frequencies of cross-matching incompatibility, so as to propose corresponding solutions. Methods: Data of cross-matching incompatibility samples from 92 medical institutions during 2022 to 2024 were collected and divided into three groups based on the frequency of cross-matching. Statistical analysis was performed on disease types, distribution of hematologic diseases, alloantibody detection rates, and proportions of alloantibody types. Results: The 858 patients were divided into three groups based on the frequency of blood cross-matching incompatibility: ≥5 times (8.28%, 71/858), 2 to 4 times (28.21%, 242/858); 1 time (63.52%, 545/858). There was a clustered distribution of disease types in the ≥5 cross-matchings group, with 71.83% (51/71) of patients having tumors or hematologic and hematopoietic diseases. In contrast, the disease types in the 2 to 4 cross-matchings and 1 cross-matching groups were more diverse. An analysis of 249 patients with hematologic diseases found that multiple myeloma was the most common disease in all three groups, accounting for 31.43% (11/35), 35.37% (29/82), and 37.88% (50/132) respectively. In the ≥5 cross-matchings group, myelodysplastic syndrome (14.29%, 5/35) and thalassemia (14.29%, 5/35) were the second most common diseases. In contrast, in the 2 to 4 cross-matchings group and 1 cross-matching group, autoimmune hemolytic anemia was the second most common disease, with prevalence rates of 20.73% (17/82) and 24.24% (32/132), respectively. Alloantibodies were detected in 54.66% of the patients, with antibodies against Rh blood group being most frequent (>50%) in all three groups. The detection rates of alloantibodies/alloantibodies with coexisting autoantibodies decreased across groups: the ≥5 cross-matchings group (70.42%, 50/71) > the 2 to 4 cross-matchings group (54.96%, 133/242) > the 1 cross-matching group (52.48%, 286/545). Conclusion: The risk of alloantibody production increases in patients with multiple cross-matching incompatibilities, especially in those with tumors or hematologic diseases. For handling of cross-matching incompatibility cases, it is recommended to optimize the cross-matching process, implement individualized transfusion plans, and enhance the technical capabilities of clinical transfusion departments and blood group reference laboratories to ensure the safety and effectiveness of transfusions.
3.Sishenwan Restores Intestinal Barrier in Rat Model of Diarrhea-predominant Irritable Bowel Syndrome Due to Spleen-kidney Yang Deficiency by Regulating Intestinal Flora and Short-chain Fatty Acids
Qian ZHANG ; Siqi LI ; HUYUNLIAN ; Na WEN ; Chaoqun HUANG ; Binbin LIU ; Chengxia SU
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(21):80-89
ObjectiveTo investigate the effect and mechanism of Sishenwan in restoring the intestinal barrier function in the rat model of diarrhea-predominant irritable bowel syndrome (IBS-D) due to spleen-kidney Yang deficiency based on intestinal flora and short-chain fatty acids. MethodsAfter the delivery of 10 SPF-grade pregnant rats, 4 male suckling rats were kept in each litter for the experiment. The male suckling rats were randomly allocated into blank, model, low-dose (3.51 g·kg-1) Sishenwan, high-dose (7.02 g·kg-1) Sishenwan, and Peifeikang (0.54 g·kg-1) groups, with 8 rats in each group. The blank group was fed conventionally, and the other groups were subjected to mother-child separation and Sennae Folium gavage (1 g·mL-1, 10 mL·kg-1) for the modeling of IBS-D due to spleen-kidney Yang deficiency. After the modeling was completed, the rats in Sishenwan groups were administrated with the corresponding dose of Sishenwan decoction by gavage, and the Peifeikang group with bifidobacterium triple live powder+normal saline suspension. The blank and model groups were treated with an equal volume of normal saline by gavage. The general conditions and fecal characteristics of rats were observed. After 2 weeks of administration, the rats were anesthetized for sample collection. The pathological changes of the colon tissue in rats were observed by hematoxylin-eosin staining. Enzyme-linked immunosorbent assay was employed to measure the levels of transforming growth factor-beta (TGF-β), interleukin-10 (IL-10), and interleukin-22 (IL-22). Immumohistochemical staining (IHC) was performed to detect the positive expression of zonula occludens-1 (ZO-1) and occludin in the colon tissue. Western blot was employed to determine the protein levels of ZO-1 and occludin in the colon tissue of rats, and 16S rRNA gene sequencing was performed for intestinal flora. Gas chromatography-mass spectrometry was employed to determine the content of short-chain fatty acids (SCFAs) in the cecum contents of rats. ResultsThe colon tissue in the blank group presented a clear structure, neat glands, and no inflammatory cell infiltration. In the model group, the colon tissue showcased a disorganized structure, irregular arrangement of glands, and inflammatory cell infiltration. Compared with the model group, the low-dose and high-dose Sishenwan groups and the Peifeikang group exhibited an intact colon tissue structure, regular arrangement of glands, and reduced inflammatory cell infiltration. Compared with the blank group, the modeling lowered the levels of TGF-β, IL-10, and IL-22 in the serum (P<0.01), down-regulated the protein levels of ZO-1 and occludin in the colon tissue (P<0.01), and decreased the content of acetic acid and propionic acid and increased the content of butyric acid in cecum contents (P<0.05). Compared with the model group, low-dose and high-dose Sishenwan raised the levels of TGF-β, IL-10, and IL-22 in the serum (P<0.05, P<0.01), and Peifeikang elevated the levels of TGF-β and IL-10 in the serum (P<0.01). High-dose Sishenwan and Peifeikang up-regulated the protein levels of ZO-1 and occludin (P<0.05, P<0.01), increased the content of acetic acid and propionic acid in cecum contents (P<0.05), and decreased the content of butyric acid (P<0.05). The 16S rRNA gene sequencing results showed that the intestinal flora structure of the model group changed compared with that of the blank group. Compared with the model group, Sishenwan and Peifeikang increased the relative abundance of Lachnospiraceae, Muribaculaceae, Akkermansiaceae, Ligilactobacillus, UBA3282, Akkermansia, and Corynebacterium while reducing the relative abundance of Oscillospiraceae, Desulfovibrionaceae, Lactobacillus, Romboutsia, and Desulfovibrio. They can restore the intestinal flora structure similar to that in the blank group. ConclusionSishenwan can alleviate diarrhea symptoms and colonic mucosal inflammation, increase the expression of tight junction proteins in the colonic mucosa, and strengthen the intestinal barrier in IBS-D rats with the syndrome of spleen-kidney Yang deficiency. The mechanism of action may be related to optimizing the structure and balance of intestinal flora and regulating the SCFAs, and the effect of high-dose Sishenwan is obvious.
4.Sishenwan Restores Intestinal Barrier in Rat Model of Diarrhea-predominant Irritable Bowel Syndrome Due to Spleen-kidney Yang Deficiency by Regulating Intestinal Flora and Short-chain Fatty Acids
Qian ZHANG ; Siqi LI ; HUYUNLIAN ; Na WEN ; Chaoqun HUANG ; Binbin LIU ; Chengxia SU
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(21):80-89
ObjectiveTo investigate the effect and mechanism of Sishenwan in restoring the intestinal barrier function in the rat model of diarrhea-predominant irritable bowel syndrome (IBS-D) due to spleen-kidney Yang deficiency based on intestinal flora and short-chain fatty acids. MethodsAfter the delivery of 10 SPF-grade pregnant rats, 4 male suckling rats were kept in each litter for the experiment. The male suckling rats were randomly allocated into blank, model, low-dose (3.51 g·kg-1) Sishenwan, high-dose (7.02 g·kg-1) Sishenwan, and Peifeikang (0.54 g·kg-1) groups, with 8 rats in each group. The blank group was fed conventionally, and the other groups were subjected to mother-child separation and Sennae Folium gavage (1 g·mL-1, 10 mL·kg-1) for the modeling of IBS-D due to spleen-kidney Yang deficiency. After the modeling was completed, the rats in Sishenwan groups were administrated with the corresponding dose of Sishenwan decoction by gavage, and the Peifeikang group with bifidobacterium triple live powder+normal saline suspension. The blank and model groups were treated with an equal volume of normal saline by gavage. The general conditions and fecal characteristics of rats were observed. After 2 weeks of administration, the rats were anesthetized for sample collection. The pathological changes of the colon tissue in rats were observed by hematoxylin-eosin staining. Enzyme-linked immunosorbent assay was employed to measure the levels of transforming growth factor-beta (TGF-β), interleukin-10 (IL-10), and interleukin-22 (IL-22). Immumohistochemical staining (IHC) was performed to detect the positive expression of zonula occludens-1 (ZO-1) and occludin in the colon tissue. Western blot was employed to determine the protein levels of ZO-1 and occludin in the colon tissue of rats, and 16S rRNA gene sequencing was performed for intestinal flora. Gas chromatography-mass spectrometry was employed to determine the content of short-chain fatty acids (SCFAs) in the cecum contents of rats. ResultsThe colon tissue in the blank group presented a clear structure, neat glands, and no inflammatory cell infiltration. In the model group, the colon tissue showcased a disorganized structure, irregular arrangement of glands, and inflammatory cell infiltration. Compared with the model group, the low-dose and high-dose Sishenwan groups and the Peifeikang group exhibited an intact colon tissue structure, regular arrangement of glands, and reduced inflammatory cell infiltration. Compared with the blank group, the modeling lowered the levels of TGF-β, IL-10, and IL-22 in the serum (P<0.01), down-regulated the protein levels of ZO-1 and occludin in the colon tissue (P<0.01), and decreased the content of acetic acid and propionic acid and increased the content of butyric acid in cecum contents (P<0.05). Compared with the model group, low-dose and high-dose Sishenwan raised the levels of TGF-β, IL-10, and IL-22 in the serum (P<0.05, P<0.01), and Peifeikang elevated the levels of TGF-β and IL-10 in the serum (P<0.01). High-dose Sishenwan and Peifeikang up-regulated the protein levels of ZO-1 and occludin (P<0.05, P<0.01), increased the content of acetic acid and propionic acid in cecum contents (P<0.05), and decreased the content of butyric acid (P<0.05). The 16S rRNA gene sequencing results showed that the intestinal flora structure of the model group changed compared with that of the blank group. Compared with the model group, Sishenwan and Peifeikang increased the relative abundance of Lachnospiraceae, Muribaculaceae, Akkermansiaceae, Ligilactobacillus, UBA3282, Akkermansia, and Corynebacterium while reducing the relative abundance of Oscillospiraceae, Desulfovibrionaceae, Lactobacillus, Romboutsia, and Desulfovibrio. They can restore the intestinal flora structure similar to that in the blank group. ConclusionSishenwan can alleviate diarrhea symptoms and colonic mucosal inflammation, increase the expression of tight junction proteins in the colonic mucosa, and strengthen the intestinal barrier in IBS-D rats with the syndrome of spleen-kidney Yang deficiency. The mechanism of action may be related to optimizing the structure and balance of intestinal flora and regulating the SCFAs, and the effect of high-dose Sishenwan is obvious.
5.Enhanced radiotheranostic targeting of integrin α5β1 with PEGylation-enabled peptide multidisplay platform (PEGibody): A strategy for prolonged tumor retention with fast blood clearance.
Siqi ZHANG ; Xiaohui MA ; Jiang WU ; Jieting SHEN ; Yuntao SHI ; Xingkai WANG ; Lin XIE ; Xiaona SUN ; Yuxuan WU ; Hao TIAN ; Xin GAO ; Xueyao CHEN ; Hongyi HUANG ; Lu CHEN ; Xuekai SONG ; Qichen HU ; Hailong ZHANG ; Feng WANG ; Zhao-Hui JIN ; Ming-Rong ZHANG ; Rui WANG ; Kuan HU
Acta Pharmaceutica Sinica B 2025;15(2):692-706
Peptide-based radiopharmaceuticals targeting integrin α5β1 show promise for precise tumor diagnosis and treatment. However, current peptide-based radioligands that target α5β1 demonstrate inadequate in vivo performance owing to limited tumor retention. The use of PEGylation to enhance the tumor retention of radiopharmaceuticals by prolonging blood circulation time poses a risk of increased blood toxicity. Therefore, a PEGylation strategy that boosts tumor retention while minimizing blood circulation time is urgently needed. Here, we developed a PEGylation-enabled peptide multidisplay platform (PEGibody) for PR_b, an α5β1 targeting peptide. PEGibody generation involved PEGylation and self-assembly. [64Cu]QM-2303 PEGibodies displayed spherical nanoparticles ranging from 100 to 200 nm in diameter. Compared with non-PEGylated radioligands, [64Cu]QM-2303 demonstrated enhanced tumor retention time due to increased binding affinity and stability. Importantly, the biodistribution analysis confirmed rapid clearance of [64Cu]QM-2303 from the bloodstream. Administration of a single dose of [177Lu]QM-2303 led to robust antitumor efficacy. Furthermore, [64Cu]/[177Lu]QM-2303 exhibited low hematological and organ toxicity in both healthy and tumor-bearing mice. Therefore, this study presents a PEGibody-based radiotheranostic approach that enhances tumor retention time and provides long-lasting antitumor effects without prolonging blood circulation lifetime. The PEGibody-based radiopharmaceutical [64Cu]/[177Lu]QM-2303 shows great potential for positron emission tomography imaging-guided targeted radionuclide therapy for α5β1-overexpressing tumors.
6.Targeting stem-property and vasculogenic mimicry for sensitizing paclitaxel therapy of triple-negative breast cancer by biomimetic codelivery.
Siqi WU ; Qing TANG ; Weifeng FANG ; Zhe SUN ; Meng ZHANG ; Ergang LIU ; Yang CAO ; Yongzhuo HUANG
Acta Pharmaceutica Sinica B 2025;15(6):3226-3242
Triple-negative breast cancer (TNBC) is aggressive, with high recurrence rates and poor prognosis. Paclitaxel (PTX) remains a key chemotherapeutic agent for TNBC, but its efficacy diminishes due to the emergence of drug resistance, largely driven by cancer stem-like cells (CSCs), vasculogenic mimicry (VM) formation and tumor immunosuppressive microenvironment (TIME). Pyruvate kinase M2 (PKM2) is highly expressed in TNBC, and is a potential target for TNBC treatment. In this study, we developed a biomimetic codelivery system using albumin nanoparticles (termed S/P NP) to co-encapsulate PTX and shikonin (SHK), a natural inhibitor of PKM2. By inhibiting PKM2, SHK suppressed β-Catenin signaling, thereby reversing CSC stemness and preventing VM formation. The S/P NP system exhibited tumor-targeting delivery effect and significantly inhibited TNBC growth and lung metastasis. Mechanistically, the treatment reversed epithelial-mesenchymal transition (EMT) and stem-like properties of TNBC cells, suppressed VM formation, and remodeled the TIME. It reduced immunosuppressive cells (M2 macrophages, MDSCs) while promoting anti-tumor immunity (M1 macrophages, dendritic cells, cytotoxic T cells, and memory T cells). This dual-action strategy holds promise for improving TNBC therapy by targeting CSCs, VM, and the immune microenvironment, and for overcoming PTX resistance and reducing metastasis.
7.Augmentation of PRDX1-DOK3 interaction alleviates rheumatoid arthritis progression by suppressing plasma cell differentiation.
Wenzhen DANG ; Xiaomin WANG ; Huaying LI ; Yixuan XU ; Xinyu LI ; Siqi HUANG ; Hongru TAO ; Xiao LI ; Yulin YANG ; Lijiang XUAN ; Weilie XIAO ; Dean GUO ; Hao ZHANG ; Qiong WU ; Jie ZHENG ; Xiaoyan SHEN ; Kaixian CHEN ; Heng XU ; Yuanyuan ZHANG ; Cheng LUO
Acta Pharmaceutica Sinica B 2025;15(8):3997-4013
Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by persistent inflammation and joint damage, accompanied by the accumulation of plasma cells, which contributes to its pathogenesis. Understanding the genetic alterations occurring during plasma cell differentiation in RA can deepen our comprehension of its pathogenesis and guide the development of targeted therapeutic interventions. Here, our study elucidates the intricate molecular mechanisms underlying plasma cell differentiation by demonstrating that PRDX1 interacts with DOK3 and modulates its degradation by the autophagy-lysosome pathway. This interaction results in the inhibition of plasma cell differentiation, thereby alleviating the progression of collagen-induced arthritis. Additionally, our investigation identifies Salvianolic acid B (SAB) as a potent small molecular glue-like compound that enhances the interaction between PRDX1 and DOK3, consequently impeding the progression of collagen-induced arthritis by inhibiting plasma cell differentiation. Collectively, these findings underscore the therapeutic potential of developing chemical stabilizers for the PRDX1-DOK3 complex in suppressing plasma cell differentiation for RA treatment and establish a theoretical basis for targeting PRDX1-protein interactions as specific therapeutic targets in various diseases.
8.Fibroblast activation protein targeting radiopharmaceuticals: From drug design to clinical translation.
Yuxuan WU ; Xingkai WANG ; Xiaona SUN ; Xin GAO ; Siqi ZHANG ; Jieting SHEN ; Hao TIAN ; Xueyao CHEN ; Hongyi HUANG ; Shuo JIANG ; Boyang ZHANG ; Yingzi ZHANG ; Minzi LU ; Hailong ZHANG ; Zhicheng SUN ; Ruping LIU ; Hong ZHANG ; Ming-Rong ZHANG ; Kuan HU ; Rui WANG
Acta Pharmaceutica Sinica B 2025;15(9):4511-4542
The activation proteins released by fibroblasts in the tumor microenvironment regulate tumor growth, migration, and treatment response, thereby influencing tumor progression and therapeutic outcomes. Owing to the proliferation and metastasis of tumors, fibroblast activation protein (FAP) is typically highly expressed in the tumor stroma, whereas it is nearly absent in adult normal tissues and benign lesions, making it an attractive target for precision medicine. Radiolabeled agents targeting FAP have the potential for targeted cancer diagnosis and therapy. This comprehensive review aims to describe the evolution of FAPI-based radiopharmaceuticals and their structural optimization. Within its scope, this review summarizes the advances in the use of radiolabeled small molecule inhibitors for tumor imaging and therapy as well as the modification strategies for FAPIs, combined with insights from structure-activity relationships and clinical studies, providing a valuable perspective for radiopharmaceutical clinical development and application.
9.Meta-synthesis of qualitative research of exercise behavior perception in community-dwelling older adults with frailty
Siqi JIANG ; Huanhuan HUANG ; Lijuan CHEN ; Ying PENG ; Xinyu YU ; Chunni WANG ; Mei CHEN ; Li XU ; Qinghua ZHAO
Chinese Journal of Nursing 2025;60(1):113-120
Objective To systematically evaluate and integrate qualitative studies on perception of exercise behaviors in community-dwelling older adults with frailty,and to provide references for clinical development of targeted exercise intervention strategies.Methods A systematic search of PubMed,Medline,Embase,PsycINFO,the Cochrane Library,SinoMed,Wanfang Database,CNKI,and VIP Database for qualitative studies on perception of exercise behaviors in older adults with frailty in the community was conducted from the inception of the databases to June 2024.Literature quality was evaluated using the Australian Joanna Briggs Institute Centre for Evidence-Based Health Care Quality Assessment Criteria for Qualitative Research(2016 edition),and Meta-synthesis was performed using the theme synthesis method.Results A total of 10 papers were included,grouped into 10 categories and integrated into the 3 domains of the capability,opportunity,and motivation-behavior model(COM-B model),i.e.Preparation for exercise behavior is influenced by capability factors(physical reserve,knowledge reserve,psychological preparation);stage-specific motivational evolution promotes the internalization of exercise behavior(guiding,focusing,stimulating,and maintaining);external conditions provide opportunities for exercise behavior(individual interaction,community environment,and social support).Conclusion Perceptions of exercise behavior among community-dwelling older adults with frailty or are complex and influenced by a variety of factors.Future exercise intervention strategies should consider modifiable factors,enhance knowledge education,stimulate intrinsic motivation,and solidify external conditions,while also accommodating individual differences and preferences,so as to promote exercise participation and health enhancement in this group.
10.Rauch-Steindl Syndrome Caused by NSD2 Mutation:A Case Report and Follow-up of Growth Hormone Therapy
Qun ZENG ; Siqi HUANG ; Hui OU ; Xiaojuan LI ; Liyang LIANG
Journal of Sun Yat-sen University(Medical Sciences) 2025;46(4):714-720
[Objective]To analyze the clinical characteristics,efficacy of growth hormone(GH)therapy,and follow-up of a child with Rauch-Steindl syndrome(RAUST)caused by NSD2 gene mutation,aiming to enhance pediatricians'understanding of this disorder.[Methods]We summarized the clinical features,gene test results,outcomes of GH therapy,and follow-up data of a child with RAUST syndrome caused by NSD2 mutation admitted to the Pediatric Endocrinology Department of Sun Yat-sen Memorial Hospital in April 2017,and then conducted a comparative analysis with relevant literature.[Results]The 2.9-year-old boy at initial visit was born prematurely at 36 weeks of gestation,with a birth weight of 1.7 kg and a body length of 42.0 cm.Clinical manifestations included intrauterine growth retardation,delayed language and motor development,extreme short stature(82.0 cm,-3.7 SD),emaciation,and distinctive facial features(triangular face,narrow jaw,prominent forehead,arched eyebrows,sparse eyebrows,high anterior hairline,crowded dentition),accompanied by bilateral cryptorchidism.Bone age was delayed by 1.4 years.Karyotyping and chromosomal microarray analysis were normal.GH therapy initiated at 3.8 years old yielded annual growth rates of 4.9-6.6 cm/year.When the treatment was discontinued at the age of 8.0,the boy's height was 113.7 cm(-3.0 SD),with subsequent decline in growth velocity.Whole exome sequencing in July 2024 identified a frameshift variant c.4028del(p.Pro1343Glnfs*49)in NSD2,which was confirmed as de novo pathogenic variation by parental Sanger sequencing.[Conclusions]This study reports the clinical features of RAUST syndrome caused by NSD2 mutation and explores the long-term efficacy of GH therapy.The findings contribute to a better understanding of this rare syndrome and further optimize its diagnosis and management.

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