1.Analysis of OCTA parameters for prognostic assessment following vitrectomy in patients with idiopathic macular epiretinal membrane
Lulu BAO ; Li WANG ; Mingliang WANG ; Min CHEN ; Zhe LIU
International Eye Science 2026;26(5):873-878
AIM: To investigate the differences in morphological structure and retinal blood perfusion between the affected eye and the contralateral healthy eye using optical coherence tomography angiography(OCTA)in patients with idiopathic macular epiretinal membrane(IMEM)before and after surgery, and to evaluate the association of these parameters with functional and anatomical outcomes to inform prognostic assessment. METHODS:A prospective study was conducted at Zhejiang Provincial People's Hospital between January 2023 and December 2024. Consecutive patients diagnosed with unilateral IMEM were enrolled; the fellow eye served as an internal control. All participants underwent standardized ophthalmic evaluations, including optical coherence tomography(OCT), OCTA, and color fundus photography. Key quantitative parameters assessed included best-corrected visual acuity(BCVA), central macular thickness(CMT), foveal avascular zone(FAZ)area, vessel density in the inner capillary plexus(ICP), superficial capillary plexus(SCP), deep capillary plexus(DCP), and choroidal capillary perfusion area(CCPA). Measurements were obtained preoperatively and at 1 and 3 mo postoperatively. Correlation analyses were performed between the above parameters and postoperative BCVA and CMT.RESULTS: This study enrolled 30 patients(60 eyes)diagnosed with IMEM, comprising 14 males and 16 females, with a mean age of 65.4±10.8 y.At baseline, IMEM-affected eyes demonstrated significantly reduced BCVA, DCP density, and FAZ area, alongside significantly increased CMT and CCPA, compared with contralateral controls. Following vitrectomy with membrane peeling, CMT decreased significantly at both 1 and 3 mo(both P<0.05)postoperatively; DCP density and BCVA showed significant improvement(both P<0.05). No significant change in FAZ area was observed postoperatively(P>0.05). At 3 mo postoperatively, BCVA of the affected eye was negatively correlated with CMT(r=-0.549, P=0.022). At 1 mo postoperatively, CMT was negatively correlated with preoperative DCP and FAZ, positively correlated with preoperative CMT, and positively correlated with ICP and SCP at 1 mo postoperatively, and negatively correlated with FAZ at 1 mo postoperatively(all P<0.05). Furthermore, CMT at 3 mo postoperatively was negatively correlated with preoperative DCP(r=-0.498,P=0.042).CONCLUSION:In patients with IMEM, the affected eyes exhibit significantly reduced DCP density and FAZ area, alongside increased CMT and CCPA. Following vitrectomy with membrane peeling, CMT decreased progressively, DCP density demonstrated partial restoration, and vision improved gradually. Preoperatively, smaller CMT larger DCP, and FAZ were associated with more favorable surgical outcomes; postoperatively, smaller ICP and SCP densities—combined with a larger FAZ—also correlated with better functional recovery.
2.Mechanisms of Huanglian Jiedutang and Its Major Active Constituents in Inhibiting LPS-induced M1 Polarisation of BV2 Microglia
Haojia ZHANG ; Kai WANG ; Kunjing LIU ; Xin LAN ; Zijin SUN ; Chunyu WANG ; Wenyuan MA ; Wei SHAO ; Jinhua HAN ; Liyang DONG ; Changxiang LI ; Xueqian WANG ; Youxiang CUI ; Fafeng CHENG ; Qingguo WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(11):44-55
ObjectiveTo investigate whether Huanglian Jiedutang (HLJD) and its major active constituents (geniposide, baicalin, and berberine) can inhibit the inflammatory response of BV2 cells under lipopolysaccharide (LPS) stimulation via the high-mobility group protein B1 (HMGB1)/Toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) signaling pathway, and to explore differences in therapeutic efficacy among the three monomers, their combined formula, and HLJD under equal content ratios. MethodsBV2 microglial cells were used as the primary experimental model. Cell viability was assessed using the cell counting kit-8 (CCK-8) method to examine the effects of different concentrations of dimethyl sulfoxide (DMSO, 0.8%, 0.4%, 0.2%, 0.1%, and 0.05%) on cell viability. IncuCyte was employed to monitor the growth of cells under different concentrations of HLJD (200, 100, 50, 25, 12.5, 6.25 mg·L-1). Nitric oxide (NO) assay was used to screen the optimal HLJD concentration. High-performance liquid chromatography (HPLC) determined the content of geniposide, baicalin, and berberine in HLJD, and experimental groups were subsequently established according to the relative proportions of these constituents. CCK-8 assay evaluated cell viability under different treatments. Enzyme-linked immunosorbent assay (ELISA) measured levels of inflammatory factors (TNF-α, IL-1β, IL-6, IL-10) in the supernatant. Flow cytometry assessed the effects of treatments on M1-type polarization of BV2 cells. Western blot determined the expression levels of HMGB1, TLR4, and NF-κB-related proteins. ResultsCompared with the blank group, DMSO at concentrations ≤0.2% did not affect cell viability within 48 h. BV2 cell growth plateaued at 24 h after treatment with 200 mg·L-1 HLJD. Under stimulation with 2 mg·L-1 LPS, this concentration of HLJD effectively reduced NO release, and 6 h pre-treatment had a stronger inhibitory effect on NO than direct administration. HPLC results showed that 1 mg of HLJD freeze-dried powder contained approximately 24 μg of geniposide, 15 μg of baicalin, and 30 μg of berberine. Based on these ratios, experimental groups were blank, LPS (2 mg·L-1), HLJD (200 mg·L-1), monomer combination, geniposide (4.8 mg·L-1), baicalin (3 mg·L-1), and berberine (6 mg·L-1). The monomer combination group consisted of all three active constituents dissolved together. LPS and HLJD or its active constituents did not affect cell viability compared with the blank group. LPS significantly increased TNF-α, IL-1β, IL-6, and IL-10 in the supernatant (P<0.01). HLJD and its active constituents significantly reduced pro-inflammatory factors TNF-α, IL-1β, and IL-6 (P<0.05, P<0.01) while upregulating anti-inflammatory IL-10 (P<0.01), with the monomer combination showing the strongest effect (P<0.05, P<0.01). Compared with the blank group, LPS significantly increased the proportion of CD80⁺CD86⁺ (M1-type) BV2 cells (P<0.01). HLJD and its constituents partially inhibited M1 polarization (P<0.05, P<0.01), with the monomer combination exhibiting the most pronounced effect (P<0.05, P<0.01). Compared with the blank group, LPS upregulated HMGB1, TLR4, and NF-κB-related proteins (P<0.01), whereas HLJD and its active constituents significantly reduced their expression (P<0.05, P<0.01), with the monomer combination having the strongest regulatory effect (P<0.05, P<0.01). ConclusionHLJD and its major active constituents (geniposide, baicalin, berberine) can inhibit LPS-induced inflammatory responses in BV2 cells. The combination of the three active constituents demonstrates the most potent anti-inflammatory effect, significantly attenuating M1-type polarization of BV2 cells via the HMGB1/TLR4/NF-κB signaling pathway.
3.WANG Qingguo's Experience in Treatment of Headache Based on the Concept of "Achieving Harmony by Unblocking and Balancing"
Chuxin ZHANG ; Zilin REN ; Yang ZHAO ; Jinhua HAN ; Bomin ZHANG ; Fafeng CHENG ; Changxiang LI ; Xueqian WANG ;
Journal of Traditional Chinese Medicine 2026;67(9):935-940
This paper summarizes professor WANG Qingguo's experience in treatment of headache based on the "achieving harmony by unblocking and balancing" concept. It is considered that although the pathogenesis of headache is generally attributed to "pain arises from obstruction" and "pain arises from malnourishment", clinical presentations often involve a complex mixture of deficiency and excess, as well as cold and heat patterns. Professor WANG proposes the diagnostic and therapeutic theory of "achieving harmony by unblocking and balancing", advocating for equal emphasis on "freeing the flow of qi and blood" and "regulating the balance of yin and yang". He has summarized eight treatment methods for common headache patterns. For wind-cold attacking the collaterals, treatment should focus on dispersing and unblocking through modified Gegen Decoction (葛根汤). For wind-dampness binding, it is recommended to unblock and drain, using modified Qingshang Juantong Decoction (清上蠲痛汤). For damp-heat congestion, unblocking and clearing is the method, using modified Toufeng Shen Formula (头风神方). For liver-gallbladder qi constraint, unblocking and soothing is the treatment principle, and modified Sanpian Decoction (散偏汤) is suggested. For insufficiency of center qi, even supplementation method is recommended, and modified Yiqi Congming Decoction (益气聪明汤) can be used. For liver yang hyperactivity, unblocking and subduing are combined, using modified Xunlong Decoction (驯龙汤). For deficiency-cold in the liver and stomach, warming, harmonizing, unblocking, and descending are applied, using modified Wuzhuyu Decoction (吴茱萸汤). For blood deficiency with cold congelation, unblocking and nourishing are undertaken together, using modified Danggui Sini Decoction (当归四逆汤). The ultimate goal is to restore the dynamic balance of yin, yang, qi, and blood in the body, thereby allevia-ting pain by restoring clarity and function to the head orifices.
4.WANG Qingguo's Experience in Treatment of Headache Based on the Concept of "Achieving Harmony by Unblocking and Balancing"
Chuxin ZHANG ; Zilin REN ; Yang ZHAO ; Jinhua HAN ; Bomin ZHANG ; Fafeng CHENG ; Changxiang LI ; Xueqian WANG ;
Journal of Traditional Chinese Medicine 2026;67(9):935-940
This paper summarizes professor WANG Qingguo's experience in treatment of headache based on the "achieving harmony by unblocking and balancing" concept. It is considered that although the pathogenesis of headache is generally attributed to "pain arises from obstruction" and "pain arises from malnourishment", clinical presentations often involve a complex mixture of deficiency and excess, as well as cold and heat patterns. Professor WANG proposes the diagnostic and therapeutic theory of "achieving harmony by unblocking and balancing", advocating for equal emphasis on "freeing the flow of qi and blood" and "regulating the balance of yin and yang". He has summarized eight treatment methods for common headache patterns. For wind-cold attacking the collaterals, treatment should focus on dispersing and unblocking through modified Gegen Decoction (葛根汤). For wind-dampness binding, it is recommended to unblock and drain, using modified Qingshang Juantong Decoction (清上蠲痛汤). For damp-heat congestion, unblocking and clearing is the method, using modified Toufeng Shen Formula (头风神方). For liver-gallbladder qi constraint, unblocking and soothing is the treatment principle, and modified Sanpian Decoction (散偏汤) is suggested. For insufficiency of center qi, even supplementation method is recommended, and modified Yiqi Congming Decoction (益气聪明汤) can be used. For liver yang hyperactivity, unblocking and subduing are combined, using modified Xunlong Decoction (驯龙汤). For deficiency-cold in the liver and stomach, warming, harmonizing, unblocking, and descending are applied, using modified Wuzhuyu Decoction (吴茱萸汤). For blood deficiency with cold congelation, unblocking and nourishing are undertaken together, using modified Danggui Sini Decoction (当归四逆汤). The ultimate goal is to restore the dynamic balance of yin, yang, qi, and blood in the body, thereby allevia-ting pain by restoring clarity and function to the head orifices.
5.Construction of A Survival Prediction Model for Immunotherapy in Locally Advanced or Metastatic Non-Small Cell Lung Cancer Based on PD-L1 Expression Combined with Nutritional Status Score
Jinhua LI ; Ping QI ; Jili MA ; Yaxia LYU ; Caihong FU ; Longxia ZHANG ; Hui QIAO
Cancer Research on Prevention and Treatment 2026;53(6):457-466
Objective To analyze the factors affecting the prognosis of patients with locally advanced or metastatic non-small cell lung cancer (NSCLC) undergoing immunotherapy and construct an individualized prognostic nomogram prediction model. Methods A retrospective analysis was conducted on the clinical data of 385 patients with driver gene-negative, locally advanced or metastatic NSCLC who received first-line immune checkpoint inhibitors. Univariate and multivariate Cox regression analyses were used to identify prognostic risk factors, and a prognostic nomogram model was established. The predictive performance of the model was evaluated using the concordance index (C-index), time-dependent receiver operating characteristic (ROC) curves and area under the curve (AUC), and calibration curves. The cutoff value of the nomogram was calculated to stratify patients by risk. Survival curves were calculated by Kaplan-Meier analysis. Results Age (HR=1.775, 95%CI: 1.265-2.490), degree of differentiation (HR=0.365, 95%CI: 0.257-0.519), low PD-L1 expression (HR=0.661, 95%CI: 0.455-0.960), high PD-L1 expression (HR=0.423, 95%CI: 0.297-0.603), SCC-Ag (HR=1.549, 95%CI: 1.109-2.163), and CONUT score (HR=2.527, 95%CI: 1.797-3.554) were independent risk factors affecting overall survival (OS) of patients with NSCLC undergoing immunotherapy. The nomogram prediction model constructed on the basis of these factors had a C-index of 0.767. Time-dependent ROC curves for survival showed that the AUCs for 1-, 2-, and 3-year OS were 0.830, 0.853, and 0.886, respectively. Calibration curves indicated that the nomogram-predicted survival rates were in good agreement with the actual outcomes. The cutoff value for the study’s nomogram prediction model was 136.60 points, and survival curves showed statistically significant differences between different risk groups (P<0.05). Conclusion The nomogram model established in this study can effectively predict the prognosis of patients with driver gene-negative locally advanced or metastatic NSCLC treated with first-line immunosuppressive therapy. It provides a new tool for assessing prognosis and aids clinicians in formulating individualized treatment plans.
6.The Neural Circuit Characteristics of Repetitive Transcranial Magnetic Stimulation Over The Dorsolateral Prefrontal Cortex for The Treatment of Migraine
Chen-Xia JIN ; Bo-Lin TAN ; Yang YE ; Ji-Qing HE ; Ling-Yan WANG ; Zhong-Ming GAO ; Yu-Jun WANG ; Hui-Li LIU ; Yong-Xing YAN ; Xian-Wei CHE
Progress in Biochemistry and Biophysics 2026;53(7):1953-1968
ObjectiveMigraine is a leading neurological disorder and the fourth most common cause of years lived with disability worldwide, affecting nearly 116 million individuals. Although pharmacological treatments are available, their efficacy is often limited by side effects and variable response rates. Repetitive transcranial magnetic stimulation (rTMS) over the dorsolateral prefrontal cortex (DLPFC) offers a safe, non-invasive alternative for migraine management. However, the neurophysiological mechanisms, particularly how rTMS modulates local cortical excitability and distributed pain-related circuits, remain poorly understood. Elucidating these mechanisms is essential for optimizing treatment protocols and improving clinical outcomes. MethodsThis study employed concurrent transcranial magnetic stimulation and electroencephalography (TMS-EEG) to investigate neuroplastic and neurocircuitry mechanisms of DLPFC-rTMS in migraine. Study 1 compared 30 migraineurs and 28 healthy controls to identify abnormalities in TMS-evoked potentials (TEPs) and significant current density (SCD) within sensory-discriminative regions including the primary somatosensory cortex (S1) and posterior insula (pINS), cognitive-affective regions including the anterior insula (aINS) and midcingulate cortex (MCC), and a descending modulatory region, the periaqueductal gray (PAG). Study 2 used a single-blind, crossover, sham-controlled design in 34 healthy participants. Each participant received both active (10 Hz, 80% RMT, 1 500 pulses) and sham DLPFC-rTMS in counterbalanced order. TMS-EEG and cold pain tolerance were assessed before and after each session. ResultsIn Study 1, migraineurs showed a significantly less negative N120 amplitude compared to healthy controls (P=0.027, Cohen’s d=0.60), indicating local intracortical disinhibition. No group differences were observed for N40, P60, or P180 components. At the source level, migraineurs exhibited significantly higher SCD in the S1, pINS, aINS, and MCC (allQ<0.05), but not in the ventroposterior thalamus (vpTHAL), mediodorsal thalamus (mdTHAL), or PAG. In Study 2, active rTMS significantly reduced SCD from pre- to post-stimulation in the S1, aINS, and MCC (all Q<0.05). Sham stimulation also reduced SCD in the S1 (Q<0.05) but not in the aINS or MCC. Although no significant group-level analgesic effect was observed between active and sham conditions (P=0.107), correlation analyses revealed that greater SCD reductions in the S1 and MCC were significantly associated with higher post-rTMS pain tolerance (R=-0.487 and -0.495, both Q<0.01) and larger improvements in pain tolerance(R=-0.487 and -0.451, both Q<0.05). No such correlations were found following sham stimulation, suggesting that the behavioural relevance of neural changes is specific to active rTMS. ConclusionThis study provides novel evidence that migraineurs exhibit both local neuroplastic abnormalities (reduced N120 amplitude) and hyperactivity in key pain-processing regions (S1, pINS, aINS, MCC). A single session of DLPFC-rTMS reduced hyperactivity in the aINS, MCC, and S1. Notably, greater reductions in the S1 and MCC were associated with improved pain tolerance. These findings identify distinct cortical circuitries, particularly within the cognitive-affective pain network, that may serve as potential biomarkers for optimizing rTMS treatment in migraine and other chronic pain conditions. Future studies should validate these results in patient populations experiencing spontaneous migraine attacks and explore multi-session or accelerated rTMS protocols.
7.Identification and Analysis of the Klebsiella pneumoniae Species Complex in Laboratory Rats and Mice
Sujing QIANG ; Dongting LI ; Jinhua XU ; Li CAI ; Siyu WEI ; Jialei ZOU ; Yuqiang DING
Laboratory Animal and Comparative Medicine 2026;46(4):564-572
ObjectiveTo analyze the phylogroups of Klebsiella pneumoniae isolates from laboratory rats and mice housed at the Laboratory Animal Center Fudan University, optimize the identification method for Klebsiella pneumoniae, and perform virulence genes detection and antimicrobial susceptibility testing, thereby providing a practical basis for microbial detection strategies and prevention and control measures in laboratory animal facilities. MethodsBetween September 2023 and September 2025, ileocecal contents were collected from laboratory rats and mice purchased from laboratory animal suppliers, from which 11 strains of Klebsiella pneumoniae were isolated and cryopreserved. These strains were tested for β-lactamase genes using multiplex PCR for phylogrouping. Furthermore, representative strains from different phylogroups were selected for biochemical tests, mass spectrometry analysis, 16S rRNA gene and tyrB gene sequencing, as well as virulence genes detection and antimicrobial susceptibility testing. ResultsMultiplex PCR detection of β-lactamase genes revealed that among 11 strains, 4 were identified as Klebsiella pneumoniae (Kp1), 4 as Klebsiella quasipneumoniae (Kp2), and 3 as Klebsiella variicola (Kp3). Kp1-Kp3 could not be differentiated using biochemical tests, mass spectrometry analysis, or 16S rRNA gene sequencing, whereas multiplex PCR of β-lactamase genes and tyrB gene sequencing enabled phylogrouping of all three. There were differences in the detection rates of capsular genes (capsule associated gene G and magnesium transport system ATP-binding protein A) and siderophore genes (Klebsiella pneumoniae iron uptake system genes) among Kp1-Kp3; susceptibility to different antibiotics also varied considerably. ConclusionKlebsiella pneumoniae phylogroups isolated from commercially produced laboratory rats and mice are similar to those in human clinical samples and likewise include multiple phylogroups of the species complex. In this study, the identification methods of Kp1-Kp3 were optimized,furthermore selected virulence genes and antimicrobial resistance in Kp1-Kp3 were preliminarily investigated, which could provide precise reference for the treatment of infections caused by different phylogroups occurring in laboratory animal facilities.
8.Analysis on the Safety and Feasibility of Visual Nephroscope-assisted One-step Puncture in Percutaneous Nephrolithotomy
Wei JIAO ; Shang XU ; Xinning WANG ; Jinhua LI
Journal of Sun Yat-sen University(Medical Sciences) 2026;47(1):189-194
ObjectiveTo explore the advantages and feasibility of visual nephroscope-assisted one-step puncture in the establishment of percutaneous nephrolithotomy (PCNL) channels. MethodsThe clinical data of patients who underwent PCNL in the Affiliated Hospital of Qingdao University from January 2024 to June 2024 were retrospectively analyzed. According to whether the visual nephroscope-assisted one-step puncture was used to establish the percutaneous renal channel, the patients were divided into an observation group (n=32) and a control group (n=50). The clinical data (such as Guy's stone score of kidney stones, degree of hydronephrosis, number of channels, etc.) and postoperative recovery conditions (such as postoperative complications, degree of hemoglobin decrease, acute kidney injury, etc.) of the two groups were compared. ResultsA total of 51 channels were established in the observation group, and all channels were successfully established. A total of 59 channels were established in the control group, among which 2 cases lost the channel during dilation and were punctured again. There were statistically significant differences between the two groups in age (P=0.049), number of channels (P=0.034) and size of channels (P<0.001), while there were no significant differences in other general data. The results of postoperative complications in the observation group and the control group showed that: in the observation group, the incidences of acute kidney injury, systemic inflammatory response syndrome (SIRS), and pleural effusion were 12.50% (4/32), 9.38% (3/32), and 6.25% (2/32) respectively, and the incidences of blood transfusion, embolism, and perirenal hematoma were all 0; in the control group, the incidences of acute kidney injury, SIRS, and pleural effusion were 8.00% (4/50), 6.00% (3/50), and 2.00% (1/50) respectively, the incidences of blood transfusion and embolism were 2.00% (1/50 for each), and the incidence of perirenal hematoma was 4.00% (2/50). ConclusionVisual nephroscope-assisted one-step puncture may quickly and accurately establish the percutaneous renal channel, which is effective and safe in PCNL.
9.Effect and safety of a conditioning regimen with chidamide and BEAM for autologous hematopoietic stem cell transplantation in lymphoma
Yuanli GONG ; Siying PAN ; Tongyao XING ; Hua YIN ; Haorui SHEN ; Li WANG ; Jinhua LIANG ; Jianyong LI ; Wei XU
Chinese Journal of Internal Medicine 2025;64(12):1211-1217
Objective:To evaluate the efficacy and safety of the Chi-BEAM regimen (chidamide combined with carmustine, etoposide, cytarabine, and melphalan) followed by autologous hematopoietic stem cell transplantation (ASCT) in patients with high-risk or relapsed/refractory lymphoma.Methods:This retrospective case series included 78 patients with newly treated high-risk or relapsed/refractory lymphoma who underwent ASCT with the Chi-BEAM conditioning regimen in the Department of Hematology, the First Affiliated Hospital of Nanjing Medical University (Jiangsu Province Hospital), from June 2021 to May 2024. Descriptive statistics were employed to evaluate clinical characteristics, efficacy, and adverse events. The Kaplan-Meier method was applied to calculate cumulative progression-free survival (PFS) and overall survival (OS) rates.Results:The median age of the 78 evaluable patients was 47 years (range 16-68), with 8 patients (10.3%) aged ≥60 years. At the first post-transplant assessment (3 months), the objective response rate was 94.9% (74/78). The median follow-up was 20.1 months (range 2.9-44.9). The median PFS time was 20.1 months (range 1.6-45.1), with a 2-year cumulative PFS rate of 81.8%. The median OS time was 20.6 months (range 3.1-45.1), with a cumulative 2-year OS rate of 93.2%. The regimen was well-tolerated; mild-to-moderate hypocalcemia within 1 week post-infusion and transient mild erythrocyturia on the infusion day were the primary adverse reactions.Conclusion:The Chi-BEAM regimen combined with ASCT demonstrates both safety and clinical benefit in patients with high-risk or relapsed/refractory lymphoma.
10.Analysis of Clinical Application Value of Expanded Non-invasive Prenatal Tes-ting for Screening Fetal Chromosome Copy Number Variations
Le ZHANG ; Jie WEI ; Jinhua ZHANG ; Lixia WANG ; Huijun LI ; Shuyuan XUE
Journal of Practical Obstetrics and Gynecology 2025;41(6):514-519
Objective:To investigate the clinical application value of expanded non-invasive prenatal testing(NIPT-plus)in screening for fetal chromosome copy number variations(CNV).Methods:From January 2021 to December 2023,141 pregnant women who voluntarily underwent amniocentesis at the Prenatal Diagnostic Centre of Urumqi Maternal and Child Health Hospital due to NIPT-plus suggesting a high risk of fetal CNV were selected.Amniotic fluid samples were collected for fetal chromosome karyotyping and chromosome microarray analysis(CMA).Pregnant women who underwent the above tests signed an informed consent form,and all cases were followed up forpregnancy outcome.Results:Among 141 NIPT-plus screen positive pregnant women,41 true posi-tive cases were detected by chromosomal karyotype analysis and CMA.The positive predictive value(PPV)for NIPT-plus screening for CNV was 29.08%(41/141).There was no statistically significant difference(P>0.05)in the PPV of CNV detected by NIPT plus among different ages,indications and variant types.However,the PPV of CNV size<10 Mb was significantly higher than that of CNV size≥ 10 Mb,and the difference was statistically signif-icant(39.62%vs.22.73%,P<0.05).Among the 41 true positive cases,in addition to CNV,the CMA also detec-ted 7 cases of regions of Homozygosity(ROH),accounting for 17.07%(7/41)of the cases,two of which involved imprinted genes located on chromosomes 6 and 7.All continued pregnancy after genetic counselling and no signif-icant abnormalities were seen at neonatal follow-up after birth.Conclusions:NIPT-plus screening for fetal CNV has some clinical value,especially for CNV with fragment size<10Mb,but accuracy needs to be further improved;CMA as a molecular diagnostic technique can detect ROH in cases where NIPT-plus suggests CNV abnormali-ties,and the combined use of the two techniques also opens new avenues for screening and diagnosis of prenatal imprinted diseases.

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