1.Clinical characteristics and genetic analysis of 22 Chinese pedigrees affected with Neurofibromatosis type I.
Bingjie HU ; Xianhong DING ; Yang LU ; Hongliang CHEN ; Shuaishuai CHEN ; Mengyi XU ; Yicheng FANG ; Bo SHEN
Chinese Journal of Medical Genetics 2026;43(1):19-30
OBJECTIVE:
To explore the genetic variants and phenotypic characteristics of patients with Neurofibromatosis type I (NF1).
METHODS:
Twenty two NF1 patients who presented at Enze Medical (Center) Group in Taizhou between 2018 and 2024 were selected as the study subjects. Clinical phenotype and family history were collected for the patients. Whole exome sequencing (WES) was carried out for the 22 probands to screen the variants of NF1 gene. Candidate variants were verified by Sanger sequencing of their family members. This study was approved by the Medical Ethics Committee of the Hospital (Ethics No.: K20230902).
RESULTS:
The 22 probands were diagnosed between the age of 5 months to 47 years old, and have all shown cafe au lait spots on their skin. Seventeen patients exhibited the phenotype at birth, and 11 had various degrees of neurofibromatosis. Among them, probands 1 and 13 underwent surgical resection of the tumor but had recurred, while proband 12 had amputation due to the huge size and serious impact of the neurofibroma and had no recurrence. Five patients had various degrees of scoliosis. In total 22 germline mutations and one somatic mutation were identified among the 22 families, with 5 variants unreported previously, including 1 nonsense mutation c.1603C>T (Q535*), 3 frameshift mutations [c.7268_7269delCA (Thr2423fs), c.2293del (Arg765Alafs*26), and c.5433_5438delinsGC (Phe1812ArgfsTer50)], and 1 deletion involving exons 41-44 of the NF1 gene and adjacent introns. Proband 13 was found to harbor germline mutation c.6796C>T (Gln2266Ter) and somatic mutation c.1019_1020del (Ser340Cysfs Ter12) in the peripheral blood and tumor tissue, respectively. Among the 22 NF1 probands, 6 had received treatment due to severe illness. Proband 1 had tumor resection in the right upper limb, but was found to have malignant lung tumor and died during follow-up. Proband 12 had multiple recurrence of neurofibroma in the left ring finger. Proband 4 underwent spinal correction surgery due to severe scoliosis. Proband 11 had died due to a central nervous system disease. Among the 22 germline mutations, 6 had led to the occurrence of truncated proteins, which may have a more severe impact on the phenotype.
CONCLUSION
This study investigated the genetic variants and clinical phenotypes of 22 NF1 families and identified 5 novel variants of the NF1 gene, which has expanded the genotypic and phenotypic spectra of the NF1. Preliminary studies have identified an association between truncated mutations, young age, and severe phenotypes, which may provide important clues for prognosis evaluation. For the clinical diagnosis and treatment of NF1, it is necessary to consider the phenotypic characteristics and genetic testing in combination with genetic counseling and long-term follow-up.
Humans
;
Neurofibromatosis 1/pathology*
;
Male
;
Female
;
Pedigree
;
Adult
;
Child
;
Child, Preschool
;
Middle Aged
;
Adolescent
;
Infant
;
Young Adult
;
Neurofibromin 1/genetics*
;
Phenotype
;
Asian People/genetics*
;
Mutation
;
Exome Sequencing
;
East Asian People
2.Parabacteroides distasonis promotes liver regeneration by increasing β-hydroxybutyric acid (BHB) production and BHB-driven STAT3 signals.
Manlan GUO ; Xiaowen JIANG ; Hui OUYANG ; Xianglong ZHANG ; Shuaishuai ZHANG ; Peng WANG ; Guofang BI ; Ting WU ; Wenhong ZHOU ; Fengting LIANG ; Xiao YANG ; Shicheng FAN ; Jian-Hong FANG ; Peng CHEN ; Huichang BI
Acta Pharmaceutica Sinica B 2025;15(3):1430-1446
The liver regenerative capacity is crucial for patients with end-stage liver disease following partial hepatectomy (PHx). The specific bacteria and mechanisms regulating liver regeneration post-PHx remain unclear. This study demonstrated dynamic changes in the abundance of Parabacteroides distasonis (P. distasonis) post-PHx, correlating with hepatocyte proliferation. Treatment with live P. distasonis significantly promoted hepatocyte proliferation and liver regeneration after PHx. Targeted metabolomics revealed a significant positive correlation between P. distasonis and β-hydroxybutyric acid (BHB), as well as hyodeoxycholic acid and 3-hydroxyphenylacetic acid in the gut after PHx. Notably, treatment with BHB, but not hyodeoxycholic acid or 3-hydroxyphenylacetic acid, significantly promoted hepatocyte proliferation and liver regeneration in mice after PHx. Moreover, STAT3 inhibitor Stattic attenuated the promotive effects of BHB on cell proliferation and liver regeneration both in vitro and in vivo. Mechanistically, P. distasonis upregulated the expression of fatty acid oxidation-related proteins, and increased BHB levels in the liver, and then BHB activated the STAT3 signaling pathway to promote liver regeneration. This study, for the first time, identifies the involvement of P. distasonis and its associated metabolite BHB in promoting liver regeneration after PHx, providing new insights for considering P. distasonis and BHB as potential strategies for promoting hepatic regeneration.
3.Causes and management strategies of anesthetic complications during percutaneous spinal endoscopic surgery under local anesthesia
Baoshan XU ; Shuaishuai WEI ; Wenyi LI ; Qiang YANG ; Binggang GUAN ; Chao CHEN ; Haiwei XU ; Ning LI ; Lilong DU ; Tongxing ZHANG ; Jiawen GUAN ; Zhaomin ZHENG ; Yue ZHOU
Chinese Journal of Orthopaedics 2025;45(1):51-58
Objective:To investigate the causes and management strategies of anesthetic complications during percutaneous spinal endoscopic surgery under local anesthesia.Methods:A total of 16 800 patients (8 625 males and 8 175 females) who underwent percutaneous spinal endoscopic surgery under local anesthesia (including intravenous basic anesthesia) in Tianjin Hospital, Shandong Public Health Clinical Center and Hebei General Hospital from February 2012 to February 2023 were retrospectively analyzed. The average age was 45.3±21.6 years (range, 12-84 years). There were 220 cases of posterior cervical keyhole endoscopic surgery, 50 cases of thoracic transforaminal endoscopic surgery, 70 cases of thoracic posterior interlaminar endoscopic surgery, 11 670 cases of lumbar transforaminal endoscopic surgery, and 4 790 cases of lumbar posterior interlaminar endoscopic surgery. The occurrence time, clinical manifestations, management of intraoperative anesthesia complications were recorded, as well as surgical segments, puncture sites, complication symptoms, signs, outcome and prognosis.Results:All patients received percutaneous water-mediated uniaxial spinal endoscopic surgery under local anesthesia. There were 9 patients experienced anesthesia complications, including 6 cases of epidural diffusion of anesthetics and 3 cases of anesthetics mistakenly entering the subarachnoid space. There were 4 males and 5 females, aged 48.4±18.2 years (range, 28-84 years). There were 1 case of T 12L 1 disc herniation, 1 case of C 5-6 disc herniation, 3 cases of L 4-5 disc herniation and 4 cases of L 5S 1 disc herniation. Surgical segments and procedures: 1 case of C 5-6 posterior Keyhole endoscopic surgery, 1 case of T 12L 1 transforaminal endoscopic surgery, 2 cases of L 4-5 transforaminal endoscopic surgery, 1 case of L 4-5 interlaminar endoscopic surgery, and 4 cases of L 5S 1 interlaminar endoscopic surgery. Anesthesia complications all appeared 5-10 min after injection of local anesthetics, with symptoms of decreased oxygen saturation, decreased blood pressure, altered consciousness, and sensory and motor dysfunction of limbs. 6 patients with epidural diffusion of anesthetics recovered completely after symptomatic treatment in 5 cases, and 1 case was left with foot drop. Three patients with anesthetics mistakenly entering the subarachnoid space were immediately converted to the supine position, of which one recovered by mask oxygenation; 1 patient improved after emergency tracheal intubation, rehydration, and application of vasoconstrictive medications; and 1 patient developed multiple complications such as multiorgan failure, rhabdomyolysis, and sepsis after tracheal intubation, and recovered at 3 months after surgery with symptomatic treatment. Conclusions:Epidural diffusion and entering into subarachnoid space of anesthetics are serious complications of local anesthesia in percutaneous spinal endoscopic surgery. In addition to sensory and motor dysfunction of the limbs, the functions of the respiratory and circulatory systems can also be affected. It is necessary to be alert to the occurrence of anesthesia-related complications during operation and early identification and treatment.
4.Application of holographic imaging digital localization technology in robotic partial nephrectomy for completely endophytic renal tumor
Zhengsheng LIU ; Shuaishuai SONG ; Xuegang WANG ; Kaiyan ZHANG ; Wei LI ; Zhun WU ; Bin CHEN ; Tao WANG ; Jinchun XING
Chinese Journal of Urology 2025;46(5):376-382
Objective:To evaluate the clinical value of holographic imaging-based digital localization technology in robot-assisted partial nephrectomy(RAPN)for the treatment of completely endophytic renal tumors.Methods:A retrospective analysis was conducted on the clinical data of 23 patients with completely endophytic renal tumors who underwent RAPN at the First Affiliated Hospital of Xiamen University between December 2022 and December 2024. Patients were divided into two groups based on the use of holographic imaging:the holographic imaging group(16 cases)and the conventional group(7 cases). There was no statistically significant difference between the holographic imaging group and the conventional group in terms of age[(41.9 ± 13.4)years vs.(46.9 ± 13.4)years],body mass index[(25.6 ± 4.8)kg/m2 vs.(24.7 ± 3.1)kg/m2],maximum tumor diameter[(3.1 ± 0.9)cm vs.(3.0 ± 9.0)cm],tumor volume[(13.2 ± 9.0)cm3 vs.(34.9 ± 9.9)cm3],R.E.N.A.L. score[(9.4 ± 1.2)points vs.(9.9 ± 0.7)points],PADUA score[(10.4 ± 0.7)points vs.(9.4 ± 0.7)points],proportion of T 1a stage patients[12 cases(75.0%)vs. 6 cases(85.7%)]and preoperative serum creatinine[(67.4 ± 9.5)μmol/L vs.(78.0 ± 16.0)μmol/L]. In the holographic group,holographic models were reconstructed based on preoperative enhanced CT or MRI images and used for preoperative planning and intraoperative localization. In the conventional group,surgeons relied on preoperative CT or MRI images for cognitive fusion during RAPN. Perioperative parameters such as warm ischemia time,operative time,tumor localization time,positive surgical margin rate,and renal function were compared between the two groups. Results:The operative time in the holographic group was significantly shorter than that in the conventional group[(152.8 ± 12.9)min vs.(218.4 ± 105.5)min, P = 0.001]. Warm ischemia time[(26.9 ± 3.4)min vs.(30.7 ± 3.8)min, P < 0.001],localization time[(4.2 ± 0.9)min vs.(8.9 ± 1.7)min, P < 0.001],and estimated blood loss[(47.0 ± 17.7)ml vs.(128.6 ± 87.8)ml, P < 0.001]were also significantly lower in the holographic group. In the conventional group,one patient underwent radical nephrectomy,while no patient in the holographic imaging group required conversion to radical nephrectomy. No cases of positive surgical margins were identified in either group. Serum creatinine levels measured one month after surgery showed no statistically significant differences between the two groups[(79.5 ± 15.7)μmol /L vs.(104.9 ± 22.5)μmol /L]. Conclusions:The application of holographic imaging-based digital localization technology in RAPN for completely endophytic renal tumors significantly reduces operative time,localization time,warm ischemia time,and intraoperative blood loss. This technology improves surgical efficiency and success rates,offering distinct clinical advantages.
5.Genetic re-analysis of a Chinese pedigree affected with Hypertrophic cardiomyopathy due to a heterozygous truncating variant of ALPK3 gene and literature review.
Chenliang HONG ; Xianhong DING ; Yang LU ; Jia ZHU ; Jinwei WANG ; Mengyi XU ; Shuaishuai CHEN ; Bo SHEN ; Weili GE
Chinese Journal of Medical Genetics 2025;42(11):1337-1346
OBJECTIVE:
To explore the clinical and genetic characteristics of a Chinese pedigree affected with Hypertrophic cardiomyopathy (HCM) due to a truncating variant of ALPK3 gene.
METHODS:
A 44-year-old male admitted to Taizhou Hospital of Zhejiang Province on December 29, 2018 was selected as the study subject. Whole-exome sequencing (WES) was carried out, and candidate variant was interpreted by following the guidelines from the American College of Medical Genetics and Genomics (ACMG). For ALPK3 was considered an autosomal recessive gene, the WES results was considered insufficient to explain his phenotype. In April 2023, the proband's WES data were re-analyzed using updated annotation pipelines, and peripheral blood samples were collected from his first-degree relatives (mother and brother) for Sanger sequencing validation. Conservation analysis and protein structural modeling were performed to assess the impact of the variant. Clinical evaluation and genetic counseling were provided to the proband's family members. Relevant literature on ALPK3tv-induced HCM patients were searched in Wanfang Data Knowledge Service Platform, CNKI, and PubMed database using "ALPK3" and "hypertrophic cardiomyopathy" as keywords. Clinical characteristics of HCM patients with heterozygous ALPK3tv variants were summarized and compared with the clinical characteristics of HCM patients with positive sarcomere-associated gene variants (SARC+). This study was approved by the Medical Ethics Committee of Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University (Ethics No.: K20230314).
RESULTS:
The proband was a 44-year-old male who was transferred to our institution on December 29, 2018 due to "chest tightness and pain for 6 months, exacerbated for 2 days". Emergency coronary angiography was performed, which led to a preliminary diagnosis of "acute coronary syndrome", and the patient was admitted to the Cardiology Department for treatment. Based on electrocardiogram and echocardiogram findings, the diagnosis was revised as HCM. The patient's condition has stabilized post-coronary angiography, and he was discharged with improved condition. On January 2019, WES was conducted to determine the etiology of the proband's HCM. WES results identified a novel heterozygous c.2156dupC (p.Pro720ThrfsTer53) truncating variant in the ALPK3 gene. At that time, the inheritance pattern could not explain the phenotype. In 2022, a literature indicated that heterozygous ALPK3tv could lead to autosomal dominant HCM. Consequently, in April 2023, the proband's whole-exome data were re-annotated, revealing changes in the transcript and protein versions, with the updated site annotated as ALPK3 (NM_020778.5): c.1550dupC (p.Pro518ThrfsTer53). Sanger sequencing confirmed that the proband's mother and brother also carried this variant. The mother exhibited obstructive HCM, while the brother showed no related phenotype. Bioinformatics analysis demonstrated conservation of this site across multiple species, and the variant has resulted in the loss of a protein domain. Based on ACMG guidelines, the variant was classified as likely pathogenic. Literature review and Bayesian calculation further elevated the pathogenicity rating, indicating that this variant was the cause of HCM in the patient. Literature study revealed distinctions between HCM caused by this variant type and SARC+ HCM. The age of onset among heterozygous ALPK3tv patients was delayed by approximately 10 years compared to SARC+ patients. Both forms of HCM exhibited a male predominance, which was particularly marked in individuals with ALPK3tv. Electrocardiographic left ventricular hypertrophy was more prevalent in heterozygous ALPK3tv patients than in SARC+ patients. The incidence of apical or concentric hypertrophy patterns was higher in heterozygous ALPK3tv patients compared to asymmetric septal hypertrophy, which predominated in SARC+ patients. ALPK3tv patients exhibited lower penetrance and later onset compared to SARC+ patients. A positive correlation between left ventricular wall thickness and age was noted in female patients only.
CONCLUSION
In this pedigree, the proband has presented with HCM, characterized by echocardiographic evidence of apical left ventricular hypertrophy without significant outflow tract obstruction or extracardiac phenotypes. Although his mother and brother had carried the same heterozygous ALPK3 (NM_020778.5) c.1550dupC (p.Pro518ThrfsTer53), the mother exhibited severe obstructive HCM, while the brother was asymptomatic, suggesting incomplete or age-dependent penetrance within the family. This study has enriched the evidence for the pathogenicity of ALPK3tv among Chinese HCM pedigrees and underscored the importance of periodic literature reviews and genetic re-analysis for unresolved genetic testing results.
Humans
;
Male
;
Pedigree
;
Adult
;
Cardiomyopathy, Hypertrophic/genetics*
;
Heterozygote
;
Asian People/genetics*
;
Exome Sequencing
;
Mutation
;
China
;
Female
;
East Asian People
6.Causes and management strategies of anesthetic complications during percutaneous spinal endoscopic surgery under local anesthesia
Baoshan XU ; Shuaishuai WEI ; Wenyi LI ; Qiang YANG ; Binggang GUAN ; Chao CHEN ; Haiwei XU ; Ning LI ; Lilong DU ; Tongxing ZHANG ; Jiawen GUAN ; Zhaomin ZHENG ; Yue ZHOU
Chinese Journal of Orthopaedics 2025;45(1):51-58
Objective:To investigate the causes and management strategies of anesthetic complications during percutaneous spinal endoscopic surgery under local anesthesia.Methods:A total of 16 800 patients (8 625 males and 8 175 females) who underwent percutaneous spinal endoscopic surgery under local anesthesia (including intravenous basic anesthesia) in Tianjin Hospital, Shandong Public Health Clinical Center and Hebei General Hospital from February 2012 to February 2023 were retrospectively analyzed. The average age was 45.3±21.6 years (range, 12-84 years). There were 220 cases of posterior cervical keyhole endoscopic surgery, 50 cases of thoracic transforaminal endoscopic surgery, 70 cases of thoracic posterior interlaminar endoscopic surgery, 11 670 cases of lumbar transforaminal endoscopic surgery, and 4 790 cases of lumbar posterior interlaminar endoscopic surgery. The occurrence time, clinical manifestations, management of intraoperative anesthesia complications were recorded, as well as surgical segments, puncture sites, complication symptoms, signs, outcome and prognosis.Results:All patients received percutaneous water-mediated uniaxial spinal endoscopic surgery under local anesthesia. There were 9 patients experienced anesthesia complications, including 6 cases of epidural diffusion of anesthetics and 3 cases of anesthetics mistakenly entering the subarachnoid space. There were 4 males and 5 females, aged 48.4±18.2 years (range, 28-84 years). There were 1 case of T 12L 1 disc herniation, 1 case of C 5-6 disc herniation, 3 cases of L 4-5 disc herniation and 4 cases of L 5S 1 disc herniation. Surgical segments and procedures: 1 case of C 5-6 posterior Keyhole endoscopic surgery, 1 case of T 12L 1 transforaminal endoscopic surgery, 2 cases of L 4-5 transforaminal endoscopic surgery, 1 case of L 4-5 interlaminar endoscopic surgery, and 4 cases of L 5S 1 interlaminar endoscopic surgery. Anesthesia complications all appeared 5-10 min after injection of local anesthetics, with symptoms of decreased oxygen saturation, decreased blood pressure, altered consciousness, and sensory and motor dysfunction of limbs. 6 patients with epidural diffusion of anesthetics recovered completely after symptomatic treatment in 5 cases, and 1 case was left with foot drop. Three patients with anesthetics mistakenly entering the subarachnoid space were immediately converted to the supine position, of which one recovered by mask oxygenation; 1 patient improved after emergency tracheal intubation, rehydration, and application of vasoconstrictive medications; and 1 patient developed multiple complications such as multiorgan failure, rhabdomyolysis, and sepsis after tracheal intubation, and recovered at 3 months after surgery with symptomatic treatment. Conclusions:Epidural diffusion and entering into subarachnoid space of anesthetics are serious complications of local anesthesia in percutaneous spinal endoscopic surgery. In addition to sensory and motor dysfunction of the limbs, the functions of the respiratory and circulatory systems can also be affected. It is necessary to be alert to the occurrence of anesthesia-related complications during operation and early identification and treatment.
7.Application of holographic imaging digital localization technology in robotic partial nephrectomy for completely endophytic renal tumor
Zhengsheng LIU ; Shuaishuai SONG ; Xuegang WANG ; Kaiyan ZHANG ; Wei LI ; Zhun WU ; Bin CHEN ; Tao WANG ; Jinchun XING
Chinese Journal of Urology 2025;46(5):376-382
Objective:To evaluate the clinical value of holographic imaging-based digital localization technology in robot-assisted partial nephrectomy(RAPN)for the treatment of completely endophytic renal tumors.Methods:A retrospective analysis was conducted on the clinical data of 23 patients with completely endophytic renal tumors who underwent RAPN at the First Affiliated Hospital of Xiamen University between December 2022 and December 2024. Patients were divided into two groups based on the use of holographic imaging:the holographic imaging group(16 cases)and the conventional group(7 cases). There was no statistically significant difference between the holographic imaging group and the conventional group in terms of age[(41.9 ± 13.4)years vs.(46.9 ± 13.4)years],body mass index[(25.6 ± 4.8)kg/m2 vs.(24.7 ± 3.1)kg/m2],maximum tumor diameter[(3.1 ± 0.9)cm vs.(3.0 ± 9.0)cm],tumor volume[(13.2 ± 9.0)cm3 vs.(34.9 ± 9.9)cm3],R.E.N.A.L. score[(9.4 ± 1.2)points vs.(9.9 ± 0.7)points],PADUA score[(10.4 ± 0.7)points vs.(9.4 ± 0.7)points],proportion of T 1a stage patients[12 cases(75.0%)vs. 6 cases(85.7%)]and preoperative serum creatinine[(67.4 ± 9.5)μmol/L vs.(78.0 ± 16.0)μmol/L]. In the holographic group,holographic models were reconstructed based on preoperative enhanced CT or MRI images and used for preoperative planning and intraoperative localization. In the conventional group,surgeons relied on preoperative CT or MRI images for cognitive fusion during RAPN. Perioperative parameters such as warm ischemia time,operative time,tumor localization time,positive surgical margin rate,and renal function were compared between the two groups. Results:The operative time in the holographic group was significantly shorter than that in the conventional group[(152.8 ± 12.9)min vs.(218.4 ± 105.5)min, P = 0.001]. Warm ischemia time[(26.9 ± 3.4)min vs.(30.7 ± 3.8)min, P < 0.001],localization time[(4.2 ± 0.9)min vs.(8.9 ± 1.7)min, P < 0.001],and estimated blood loss[(47.0 ± 17.7)ml vs.(128.6 ± 87.8)ml, P < 0.001]were also significantly lower in the holographic group. In the conventional group,one patient underwent radical nephrectomy,while no patient in the holographic imaging group required conversion to radical nephrectomy. No cases of positive surgical margins were identified in either group. Serum creatinine levels measured one month after surgery showed no statistically significant differences between the two groups[(79.5 ± 15.7)μmol /L vs.(104.9 ± 22.5)μmol /L]. Conclusions:The application of holographic imaging-based digital localization technology in RAPN for completely endophytic renal tumors significantly reduces operative time,localization time,warm ischemia time,and intraoperative blood loss. This technology improves surgical efficiency and success rates,offering distinct clinical advantages.
8.Trilogy of drug repurposing for developing cancer and chemotherapy-induced heart failure co-therapy agent.
Xin CHEN ; Xianggang MU ; Lele DING ; Xi WANG ; Fei MAO ; Jinlian WEI ; Qian LIU ; Yixiang XU ; Shuaishuai NI ; Lijun JIA ; Jian LI
Acta Pharmaceutica Sinica B 2024;14(2):729-750
Chemotherapy-induced complications, particularly lethal cardiovascular diseases, pose significant challenges for cancer survivors. The intertwined adverse effects, brought by cancer and its complication, further complicate anticancer therapy and lead to diminished clinical outcomes. Simple supplementation of cardioprotective agents falls short in addressing these challenges. Developing bi-functional co-therapy agents provided another potential solution to consolidate the chemotherapy and reduce cardiac events simultaneously. Drug repurposing was naturally endowed with co-therapeutic potential of two indications, implying a unique chance in the development of bi-functional agents. Herein, we further proposed a novel "trilogy of drug repurposing" strategy that comprises function-based, target-focused, and scaffold-driven repurposing approaches, aiming to systematically elucidate the advantages of repurposed drugs in rationally developing bi-functional agent. Through function-based repurposing, a cardioprotective agent, carvedilol (CAR), was identified as a potential neddylation inhibitor to suppress lung cancer growth. Employing target-focused SAR studies and scaffold-driven drug design, we synthesized 44 CAR derivatives to achieve a balance between anticancer and cardioprotection. Remarkably, optimal derivative 43 displayed promising bi-functional effects, especially in various self-established heart failure mice models with and without tumor-bearing. Collectively, the present study validated the practicability of the "trilogy of drug repurposing" strategy in the development of bi-functional co-therapy agents.
9.H19 recruited N 6 -methyladenosine (m 6 A) reader YTHDF1 to promote SCARB1 translation and facilitate angiogenesis in gastric cancer.
Rumeng BAI ; Miaomiao SUN ; Yuanyuan CHEN ; Shuaishuai ZHUO ; Guoxin SONG ; Tianjun WANG ; Zhihong ZHANG
Chinese Medical Journal 2023;136(14):1719-1731
BACKGROUND:
Angiogenesis is described as a complex process in which new microvessels sprout from endothelial cells of existing vasculature. This study aimed to determine whether long non-coding RNA (lncRNA) H19 induced the angiogenesis of gastric cancer (GC) and its possible mechanism.
METHODS:
Gene expression level was determined by quantitative real-time polymerase chain reaction and western blotting. Cell counting kit-8, transwell, 5-Ethynyl-2'-deoxyuridine (EdU), colony formation assay, and human umbilical vein endothelial cells (HUVECs) angiogenesis assay as well as Matrigel plug assay were conducted to study the proliferation, migration, and angiogenesis of GC in vitro and in vivo . The binding protein of H19 was found by RNA pull-down and RNA Immunoprecipitation (RIP). High-throughput sequencing was performed and next Gene Ontology (GO) as well as Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis was conducted to analyze the genes that are under H19 regulation. Methylated RIP (me-RIP) assay was used to investigate the sites and abundance among target mRNA. The transcription factor acted as upstream of H19 was determined through chromatin immunoprecipitation (ChIP) and luciferase assay.
RESULTS:
In this study, we found that hypoxia-induced factor (HIF)-1α could bind to the promoter region of H19, leading to H19 overexpression. High expression of H19 was correlated with angiogenesis in GC, and H19 knocking down could inhibit cell proliferation, migration and angiogenesis. Mechanistically, the oncogenic role of H19 was achieved by binding with the N 6 -methyladenosine (m 6 A) reader YTH domain-containing family protein 1 (YTHDF1), which could recognize the m 6 A site on the 3'-untransated regions (3'-UTR) of scavenger receptor class B member 1 (SCARB1) mRNA, resulting in over-translation of SCARB1 and thus promoting the proliferation, migration, and angiogenesis of GC cells.
CONCLUSION
HIF-1α induced overexpression of H19 via binding with the promoter of H19, and H19 promoted GC cells proliferation, migration and angiogenesis through YTHDF1/SCARB1, which might be a beneficial target for antiangiogenic therapy for GC.
Humans
;
Cell Line, Tumor
;
Cell Proliferation/genetics*
;
Endothelial Cells/metabolism*
;
Gene Expression Regulation
;
Gene Expression Regulation, Neoplastic/genetics*
;
Hypoxia
;
MicroRNAs/genetics*
;
RNA
;
RNA, Long Noncoding/metabolism*
;
RNA-Binding Proteins/metabolism*
;
Scavenger Receptors, Class B/metabolism*
;
Stomach Neoplasms/genetics*
10.Cucurbitacin B-induced G2/M cell cycle arrest of conjunctival melanoma cells mediated by GRP78-FOXM1-KIF20A pathway.
Jinlian WEI ; Xin CHEN ; Yongyun LI ; Ruoxi LI ; Keting BAO ; Liang LIAO ; Yuqing XIE ; Tiannuo YANG ; Jin ZHU ; Fei MAO ; Shuaishuai NI ; Renbing JIA ; Xiaofang XU ; Jian LI
Acta Pharmaceutica Sinica B 2022;12(10):3861-3876
Conjunctival melanoma (CM) is a rare and fatal malignant eye tumor. In this study, we deciphered a novel anti-CM mechanism of a natural tetracyclic compound named as cucurbitacin B (CuB). We found that CuB remarkably inhibited the proliferation of CM cells including CM-AS16, CRMM1, CRMM2 and CM2005.1, without toxicity to normal cells. CuB can also induce CM cells G2/M cell cycle arrest. RNA-seq screening identified KIF20A, a key downstream effector of FOXM1 pathway, was abolished by CuB treatment. Further target identification by activity-based protein profiling chemoproteomic approach revealed that GRP78 is a potential target of CuB. Several lines of evidence demonstrated that CuB interacted with GRP78 and bound with a K d value of 0.11 μmol/L. Furthermore, ATPase activity evaluation showed that CuB suppressed GRP78 both in human recombinant GRP78 protein and cellular lysates. Knockdown of the GRP78 gene significantly induced the downregulation of FOXM1 and related pathway proteins including KIF20A, underlying an interesting therapeutic perspective. Finally, CuB significantly inhibited tumor progression in NCG mice without causing obvious side effects in vivo. Taken together, our current work proved that GRP78-FOXM1-KIF20A as a promising pathway for CM therapy, and the traditional medicine CuB as a candidate drug to hinder this pathway.

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