Continuous joint motion estimation plays an important part in accomplishing more compliant and safer human-machine interaction (HMI). Surface electromyogram (sEMG) signals, which contain abundant motion information, can be used as a source for continuous joint motion estimation. In this paper, a knee joint angle prediction system based on muscle synergy theory and generalized regression neural network (GRNN) was proposed. The wavelet transform threshold method was used for sEMG signals and angle trajectories denoising. The time-domain features wave-length extracted from four-channel sEMG signals were decomposed into a synergy matrix and an activation coefficient matrix by using nonnegative matrix factorization based on muscle synergy theory. A GRNN based on golden-section search was employed to build the activation model mapping from the activation coefficients to the knee joint angles, so as to realize the continuous knee joint angle estimation. The experimental results show that the average coefficient of determination is 0.933. In addition, a user graphic interface based on the Java platform was designed to display the dynamic sEMG data and predicted knee joint angles in real time.

Vasohibin2 (VASH2), a proangiogenic factor, has been demonstrated to play an oncogenic role in some common human cancers. However, the detailed function of VASH2 in non-small cell lung cancer (NSCLC) has not previously been studied. In this study, we found that VASH2 was significantly upregulated in NSCLC tissues and cell lines, and its increased expression was associated with NSCLC progression and poor prognosis of patients. Knockdown of VASH2 markedly inhibited cell proliferation and P-glycoprotein expression in NSCLC cells. Overexpression of VASH2 enhanced cell proliferation, P-glycoprotein expression, as well as doxorubicin resistance in NSCLC cells. Moreover, the expression levels of VASH2 were significantly increased in newly established doxorubicin-resistant NSCLC cells. Molecular mechanism investigation revealed that inhibition of VASH2 expression in NSCLC cells suppressed the activity of AKT signaling, and overexpression of VASH2 enhanced the activity of AKT signaling. We further showed that downregulation of AKT signaling activity using AKT inhibitor LY294002 markedly inhibited NSCLC cell proliferation and resistance to doxorubicin induced by VASH2. In conclusion, the findings in the present study indicate that VASH2 promotes NSCLC cell proliferation and resistance to doxorubicin via modulation of AKT signaling. Thus, we suggest that VASH2 may become a potential therapeutic target for the treatment of NSCLC.

250 Background: Camrelizumab, a fully humanized monoclonal anti-PD-1 antibody, has shown promising efficacy with good tolerance in neoadjuvant therapy of resectable locally advanced esophageal cancer (EC). The present study aimed to investigate the effectiveness and safety of camrelizumab-based neoadjuvant therapy in a comparatively larger number of resectable EC patients in a real-world setting and initial results were reported here. Methods: In this prospective multicenter observational study (ChiCTR2000039170), patients with histologically confirmed resectable EC who were scheduled for camrelizumab-based neoadjuvant therapy at the discretion of treating physicians/ oncologists were included. Eligible patients were aged ≥ 18 years, had ECOG PS of 0-1, measurable disease per RECIST v1.1, adequate organ function, and expected survival time of ≥ 3 months, as well as provided written informed consent. The primary endpoint was safety. The secondary endpoints were major pathologic response (MPR), pathologic complete response (pCR), R0 resection rate, overall response rate (ORR), one-year overall survival (OS) rate, and disease-free survival (DFS). Results: At total of 166 patients (62.9 ± 9.2 years, and 84.2% male) were enrolled between October 20 2020 and August 26 2021. All patients received neoadjuvant camrelizumab plus chemotherapies (primarily nab-paclitaxel and nedaplatin) except one receiving camrelizumab alone. Overall, 109 patients (65.7%) experienced treatment-related adverse events (TRAEs), most commonly reactive cutaneous capillary endothelial proliferation (RCCEP, 45.3%), cough (10.4%), and pneumonia (8.5%). Thirteen (7.8%) patients experienced grade 3-4 TRAEs. There was no grade 5 toxicity. At the data cutoff, 141 (84.9%) patients were evaluable for radiological response, 82 (69.5%) patients underwent surgical resection. The ORR was 70.9% (100/141) and the R0 resection rate was 97.5% (79/82). Among the 81 patients available for pathologic assessment, 51 (63.0%) patients achieved MPR and of which, 15 (18.5%) had pCR. The median survival times have not been reached at the time of data analysis. Conclusions: The real-world data of our resectable EC patients showed effectiveness and safety profiles of camrelizumab-based neoadjuvant therapy consistent with those observed in previous trials.

e16023 Background: Camrelizumab, a programmed death 1 (PD-1) inhibitor, has recently demonstrated efficacy for esophageal squamous cell carcinoma (ESCC) patients in a phase III trial. We report real-world clinical outcomes of camrelizumab therapy for ESCC patients in a multicenter prospective cohort. Methods: Eligible patientswereadvanced esophageal squamous cell carcinoma with stage II-IV confirmed by pathology (including histology or cytology). All patients had received at most one systematic treatment and ECOG performance status of 0 or 1. Camrelizumab monotherapy(200mg) or combined with chemo-radiotherapy, chemotherapy, chemotherapy and antiangiogenic therapy as a first or second line of therapy were included. Progression-free survival (PFS), objective response rate (ORR), disease control rate (DCR), and overall survival (OS) and safety data were evaluated. This abstract summarizes the findings of an exploratory interim analysis (cut-off Dec 2020). Results: From Oct 2019-Dec 2020, 63 patients were enrolled (19 centers in China; mean age 62.26 years; 97% ECOG PS 1; 54% first line therapy). Patients received camrelizumab monotherapy (8; 13%), camrelizumab/chemo-radiotherapy combination therapy (22, 35%), camrelizumab/chemotherapy combination therapy (26, 41%), camrelizumab/chemotherapy/antiangiogenic therapy combination therapy (7, 11%). One patient achieved a complete response and 27 patients achieved a partial response, leading to an ORR of 41.26%. The DCR was 95.24%. The median progression-free survival (PFS) was 6.33 months (95% confidence interval [CI] 4.73-NA). Among patients with adequate samples test for LBH level and (lung immune prognostic index) LIPI score, 15.7% (8/51) patients had a high LBH level;63% (29/46), 32.6% (15/46) and 4.3% (2/46) patients had a good, middle and poor LIPI score, respectively. A significantly longer PFS was observed in patients with a normal LBH level (NA vs. 6.33 months, P = 0.049), and also in patients treated with first-line therapy (6.33 months vs. NA, P = 0.0338). Among adverse events, 4 patients (6.35%) reported grade 3-4 AEs, including pneumonia (n=2 [3.17%]), and bone marrow suppression (n=2 [3.17%]). 10 of 63 patients (15.87%) experienced any grade pneumonia, and 21 of 63 patients (33.33%) experienced grade 1-2 RCCEP. Conclusions: This real-world population showed that camrelizumab as the first- or second-line therapy was an effective and safe treatment for patients with ESCC. Clinical trial information: CHICTR2000039499.