PD-L1 CTCs and clusters in gastric cancer support MRD detection and recurrence monitoring. Publications | 3 November 2025 Assessment of PD-L1 Expression on Circulating Tumor Cells and Clusters in Gastric Cancer Patients Circulating tumor cells with PD-L1 expression and clusters are common in gastric cancer, indicating minimal residual disease and recurrence risk. Authors Khandare J, Ghadyalpatil N, Raja T, Velukuru S, Jadhav V, Satape R, Shinde S, Ashturkar A, Dattatreya P, Vasudevan A Affiliations: Actorius Innovations and Research, Pune, Maharashtra, India Apollo Cancer Institute, Hyderabad, Telangana, India Apollo Cancer Centre, Chennai, Tamil Nadu, India Aster CMI Hospital, Bengaluru, Karnataka, India Renova Soumya Cancer Center, Hyderabad, Telangana, India Introduction Gastric cancer is associated with a high mortality rate, primarily due to late-stage diagnosis, which reduces the effectiveness of treatments such as surgery and results in poor five-year survival outcomes. The rate of metastasis in early-stage gastric cancer (EGC) varies, with reported lymph node metastasis rates ranging from approximately 10% to over 23%, depending on factors such as tumor invasion depth. Although most EGC cases do not initially present with distant metastasis, a substantial proportion of patients are diagnosed at advanced, metastatic stages. In this study, we evaluated gastrointestinal cancer patients for minimal cellular residual disease using circulating tumor cells (CTCs) expressing PD-L1 and the presence of CTC clusters. Methods A total of 58 gastric cancer samples were retrospectively analyzed. CTCs were isolated using the CDSCO India–approved OncoDiscover® CTC Test, which employs immunomagnetic enrichment with anti-EpCAM antibodies. CTCs were identified through immunocytochemical staining as CK18⁺, DAPI⁺, and CD45⁻ cells. Fluorescence imaging was performed using a Zeiss Axio Observer 7 microscope, and signal intensities were quantified. PD-L1 expression on CTCs was also evaluated. Statistical analyses summarized total CTC counts, PD-L1–positive CTCs, and the presence of CTC clusters. Results Among the 58 gastric cancer patient samples analyzed, CTCs were detected in 62.1% (36/58) of cases, while 37.9% (22/58) were CTC-negative. Most samples (93.1%) were collected at baseline, and 6.9% at follow-up. Among CTC-positive cases, PD-L1 expression was observed in 51.7%, while 8.7% were PD-L1-negative. CTC clusters were identified in 83.3% (30/36) of CTC-positive patients. Regarding CTC count distribution, 31.0% of patients had one CTC, 18.9% had two, and 12.07% had three CTCs. For PD-L1–positive CTCs, 14.3% of patients had zero detectable CTCs, 51.4% had one, 25.7% had two, and 8.6% had three CTCs. The mean CTC count across all samples was 1.0, the mean number of PD-L1–positive CTCs was 0.8, and the mean cluster count was 0.1. Demographic analysis showed male predominance (61.1%), with the most represented age group being 61–70 years (29.6%), followed by 41–50 years (22.2%) and 51–60 years (20.4%). Conclusions CTCs, particularly those expressing PD-L1 and forming clusters, are prevalent in gastric cancer patients and may serve as valuable biomarkers for diagnosis and prognosis. Their detection may help assess minimal cellular residual disease (MCRD) and identify patients at risk of recurrence. View Publication Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

Actorius will present seven poster presentations at ISLB 2026 in Madrid, covering liquid biopsy, CTCs, treatment monitoring, biomarkers, residual disease and metastasis research. Events | 7 November 2026 ISLB Annual Congress 2026 | 7-9 November | Madrid, Spain Actorius will present seven scientific posters at ISLB 2026 in Madrid, showcasing research advancing the clinical potential of CTCs across treatment monitoring, biomarker analysis, residual disease, and metastasis research. Seven studies. One shared goal: advancing the clinical potential of circulating tumor cells. This November, at ISLB 2026 in Madrid , Actorius will present seven scientific posters at the International Society of Liquid Biopsy Congress—the highest number of accepted posters from any academic group or company. Our team will be presenting research spanning CTC biology, treatment monitoring, biomarker expression, algorithm-based analysis, minimal cellular residual disease, and extracorporeal approaches. Our Poster Presentations Comparative Analysis of Circulating Tumor Cells, Clusters, and PD-L1 Expression in Paired Peripheral and Portal Venous Blood with Solid Malignancies Detection of Androgen Receptor Splice Variant 7 in Circulating Tumor Cells for Dynamic Treatment Decision in Prostate Cancer Patients Algorithm-Based Analysis of Circulating Tumour Cells in Cancer Patients Evaluation of Circulating Tumor Cells Expressing PD-L1 and CTC Clusters at Baseline and Follow-Ups in Triple-Negative Breast Cancer Capture of Cancerous Cells and Overall Survival in Rats Using an Ex-Vivo Extracorporeal Device in Multiple Onco-Dialysis Cycles Capture of Epithelial-Mesenchymal Transitioning Circulating Tumor Cells Using an Affinity-Based N-Cadherin System Assessment of Minimal Cellular Residual Disease Using Circulating Tumour Cells in Pre- and Post-Surgery Breast Cancer Patients Across these seven studies, one theme connects our work: That is making circulating tumor cells more clinically meaningful—from understanding tumor biology and treatment response to monitoring residual disease and exploring new approaches to metastasis. Meet our Founders Our three co-founders will also be at ISLB Annual congress. If you work in liquid biopsy, CTC biology, oncology research, or precision oncology, we would be glad to connect and exchange perspectives. Visit us at Booth 7 Meet us in Madrid, or book a meeting in advance actorius.in Events | Actorius Innovations & Research Discover groundbreaking events where innovation meets action in oncology. Join us to explore the future of biotechnology events today! #ISLB2026 #LiquidBiopsy #CirculatingTumorCells #CTC #PrecisionOncology #CancerResearch #OncologyResearch #Actorius #CancerDiagnostics #Metastasis Research Book appointment Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

OncoDiscover enables early cancer spread detection and faster diagnosis. | ET Health Press Release | 24 August 2019 Pune scientists discover tech, first in India, to detect early spread of cancer. The new "OncoDiscover" technology discovered by a team led by Dr Jayant Khandare not only detects the early spread of cancer but doctors say it can also speed up the cancer detection process… A team of Pune scientists have discovered a technology that can detect within mere hours, the spread of cancer and claim that the new finding reduces considerably the time taken for detecting the disease. The new "OncoDiscover" technology discovered by a team led by Dr Jayant Khandare not only detects the early spread of cancer but doctors say it can also speed up the cancer detection process. Presently, in India, the final diagnosis report to detect the spread of cancer takes about 12 days whereas, with OncoDiscover technology, doctors can detect it in a mere 3.5 hours. Dr Khandare told ANI, "We felt the need for this technology because global cancer is spreading. 90 per cent of the people get to know they have cancer when it is at the second stage but through this technology, we can try saving that 90 per cent. This technology is needed to detect cancer at an early stage." Read the Full Story on The Economic Times - https://health.economictimes.indiatimes.com/news/diagnostics/pune-scientists-develop-tech-to-detect-early-spread-of-cancer/70739264 Business Standards - https://www.business-standard.com/article/news-ani/pune-scientists-discover-tech-first-in-india-to-detect-early-spread-of-cancer-119082400816_1.html View full article Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

Combined CTC and ctDNA analysis improves monitoring of metastatic colorectal cancer. Publications | 17 October 2025 Circulating Biomarkers Reveal their Complementary Association in Primary and Metastatic Colorectal Cancer Patients Combined CTC and ctDNA analysis reveals strong prognostic value for monitoring progression and metastasis in colorectal cancer patients. Background Combined analysis of biomarkers such as circulating tumor DNA (ctDNA) and circulating tumor cells (CTCs) overexpressing tumorigenic proteins offers insight into evolving genotypic transitions from primary tumors that lead to metastasis in distant organs. We report the comparative distribution of CTCs and ctDNA genomic profiling in patients stratified as primary colorectal cancer (CRC) patients alone and those with metastasis progression in the liver, lung, and lymph nodes. Methods Retrospectively, we analyzed 218 patients with primary CRC (n = 153; male n = 93 and female n = 60). Metastasis was accounted for in 65 patients, namely liver (n = 27), lung (n = 8), and lymph nodes (n = 30). A total of 285 peripheral blood samples (218 baseline and 67 follow-up) were analyzed for the distribution of CTCs and ctDNA with driver mutations. CTCs expressing PD-L1 were evaluated using the CDSCO-approved OncoDiscover platform using 1.5 ml of blood. CTCs were enumerated based on EpCAM+, CK18+, DAPI+, and CD45– markers using a Zeiss automated fluorescence microscope. Further, the OncoIndx comprehensive NGS assay was performed using a 1080-gene panel. Results At baseline, 64.8% of primary CRC patients had ≥1 CTC (mean CTC distribution ~1.1), while 55.9% of patients had detectable ctDNA. In patients with metastasis (n = 65), the mean CTC distribution was 1.8. Higher CTC distribution was observed in liver metastasis (41.5%), lymph node involvement (46.2%), and lung metastasis (12.3%). A total of 71.7% of patients had detectable CTCs, among which 88.2% showed PD-L1 expression, while 61.3% of patients had detectable ctDNA. Concordance rates were 83.7% and 100% between the presence of CTCs and ctDNA in baseline and follow-up samples from patients with primary cancer, respectively. Furthermore, a strong correlation was observed between elevated CTC counts and the presence of ctDNA mutations in key oncogenes, including KRAS, EGFR, and BRAF. Conclusions Higher co-occurrence of ctDNA with CTCs at both baseline and follow-up highlights the need for monitoring disease progression and assessing treatment response. Thus, combined analysis of CTCs and ctDNA provides significant prognostic value in metastatic colorectal cancer. View Publication Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

Liquid biopsy may replace invasive procedure to detect cancer Press Release | 23 April 2020 Times of India | Liquid biopsy may replace invasive procedure to detect cancer: Experts Liquid biopsy may replace invasive procedure to detect cancer: Experts Read the article Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

Actorius at ISMRC 2025 Events | 9 May 2025 ISMRC 2025 | 7-9 May, 2025 Actorius at ISMRC 2025 Dr. Jayant Khandare with Dr. Catherine Alix-Panabières , PhD Dr ( Associate Professor at the Faculty of Medicine of the University of Montpellier, Director of the Laboratory Rare Circulating Human Cells (LCCRH) à l'Université et CHU de Montpellier) Know more Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

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AACR 2026 - Actorius Innovations and Research Events | 23 April 2026 AACR 2026 Highlights | April 17-22 | San Diego, California Highlights from AACR 2026 Highlights from AACR 2026 We exhibited and presented two scientific posters that highlight the evolving role of circulating tumor cells (CTCs) in cancer progression and management: Over expressing PD-L1 circulating tumor cells with clusters in prostate cancer patients. Depletion of circulating tumor cells using an automated device with non-hemolytic affinity-based substrates These studies reflect our continued efforts to better understand CTC biology—not only as indicators, but as active contributors to metastasis. At the center of this work is OncoMetastat® , our patented investigational extracorporeal blood-processing platform. It is envisaged to selectively capture and study circulating tumor cells from a patient’s bloodstream while maintaining blood integrity. Designed with a strong focus on precision and safety, the current prototype is under evaluation for its potential relevance in metastasis research and broader cancer management. Some Interesting Clicks Video Highlights We look forward to engaging with researchers, clinicians, and innovators shaping the future of oncology. Know more Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

Self-propelled CNT microrockets enable rapid capture and isolation of CTCs. Publications | 13 April 2015 Manuscript: Self-propelled Carbon Nanotube Based Microrockets for Rapid Capture and Isolation of Circulating Tumor Cells Self-propelled CNT microrockets rapidly capture and magnetically isolate circulating tumor cells, enabling faster liquid biopsy and early cancer detection. We demonstrated a novel carbon nanotube (CNT)-based microrocket that propels efficiently through the thrust generated by oxygen (O₂) bubbles. These self-propelled microrockets exhibit ultrafast propulsion in aqueous solutions as well as in Dulbecco’s modified Eagle’s medium (DMEM). The microrocket generated a driving force of over 231 and 300 pN in DMEM containing 4% hydrogen peroxide (H₂O₂). The speed and distance traveled by the microrocket can be controlled by adjusting the concentration of H₂O₂. The designed multifunctional microrocket has the ability to (i) rapidly target (~5 minutes) and efficiently capture (~85%) transferrin receptor–positive (TfR⁺) cancer cells from an artificial CTC-like suspension, (ii) magnetically isolate the captured cells from peripheral blood cells, and (iii) enable subsequent high-resolution imaging. We envision that such self-powered micromotors could provide a novel and effective approach for the rapid and efficient extraction of circulating tumor cells (CTCs) from biological fluids, supporting early cancer diagnosis and detection of recurrence. View Manuscript Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

Magneto-polymeric nanosystems for rapid CTC targeting, detection & imaging. Patents | 22 April 2021 Multifunctional magneto-polymeric nanosystems for rapid targeting, isolation, detection and simultaneous imaging of circulating tumor cells A multifunctional magneto-polymeric nanosystem for rapid targeting, isolation, detection, and imaging of circulating tumor cells to support cancer diagnostics and monitoring. Patent Details Related patent documents CA2976614 TH175113 WO/2016/132265 EP3259598 ES2828025 PL3259598 US20230408525 Granted Canadian, European and Indian Patent Actorius Innovations and Research Pvt. Ltd. View Patent Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

AI-based image analysis rapidly profiles CTC morphology and biomarker expression. Publications | 16 September 2025 Profiling of PD-L1 and HER2 over expression on cancer cells using AI based macro-driven automation AI-based image analysis rapidly profiles circulating tumor cells, quantifying morphology and biomarkers like PD-L1 and HER2 for cancer research. Abstract Background Extravasation, invasion, epithelial-to-mesenchymal transitions, metastasis progression, immune evasion, and therapeutic resistance are driven by phenotypic alterations in cancer cells. Assessing cell morphology, stiffness, and deformability is therefore crucial. The expression of PD-L1, HER2, EGFR, and cytokeratins (CKs) serves as key phenotypic biomarkers for precision oncology. We developed an AI-based image analysis tool that rapidly captures these transitions in cell assays, including specific protein biomarkers expressed on circulating tumor cells (CTCs). Methods We extended an ImageJ macro to enable rapid and reproducible extraction of biophysical parameters. The macro processes .lif, .nd2, and .czi file formats, using DAPI for nuclear segmentation and fluorophore-conjugated antibodies to delineate cytoplasmic boundaries. We evaluated automatic channel detection, intensity normalization, Otsu thresholding, and per-cell quantification of parameters such as surface area, circularity index (CI), and mean fluorescence intensity. Violin plots illustrated temporal variations in CI across A549 and MCF7 cells. Validation was conducted on CTCs isolated from cancer patient samples (n = 100) for PD-L1 and HER2 expression. Results The macro reduced image processing time from 7 minutes to 3 seconds per sample. A549 cells showed higher and more consistent CI values across all time points, while MCF7 cells demonstrated lower CI with greater variability, particularly at 24 and 72 hours. Quantitative measurements of PD-L1 and HER2 expression showed 100% concordance between the ImageJ macro and Zeiss software outputs, confirming analytical accuracy. CK18 intensity (~60–400) and PD-L1 (~20–50) levels measured by both platforms validated the macro’s ability to detect a wide range of marker expression in CTC subsets. CTCs exhibited higher CI values and greater morphological heterogeneity, consistent with their invasive phenotype. Conclusions We present an AI-driven macro that quantifies the biophysical characteristics of cancer cells, enabling precise phenotypic profiling, including circularity index, proliferation rates, and overexpression of biomarkers such as PD-L1 and HER2 in both cultured cell lines and patient-derived CTCs. View Publication Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe

CTC and PD-L1 profiling supports therapy stratification and monitoring in cancers. Publications | 16 September 2025 PD-L1 overexpression on circulating tumor cells and CTC clusters: A potential biomarker across solid carcinomas Correlation of CTC detection, PD-L1 expression, and CTC clusters highlights biomarkers for minimal residual disease and cancer progression monitoring. Abstract Background Overexpression of the dynamic protein PD-L1 on circulating tumor cells (CTCs) is a highly implicative biomarker that represents post–curative intent status, minimal residual disease (MRD), disease aggressiveness, therapeutic response, and metastatic progression. We evaluated the correlation among CTC detection, PD-L1 expression, and CTC clusters present in solid tumors, namely lung, breast, colorectal, ovarian, and prostate carcinomas. Longitudinal monitoring of CTCs remains a major focus after treatments, including surgical intervention with curative intent. Methods Retrospectively, we analyzed 328 cancer patients (male 163, female 165) across stages, consisting of a total of 383 samples with baseline and follow-ups (n = 55). Cancer types included lung (27.13%), colorectal cancer (21.95%), breast (9.75%), ovary (4.2%), prostate (3.9%), and others. CTCs and clusters were detected from 1.5 ml peripheral blood using the OncoDiscover platform approved by the Central Drugs Standard Control Organization of India. The platform contains a multifunctional magneto-nanosystem mediated by anti-epithelial cell adhesion molecule (EpCAM) antibody. CTCs were confirmed as EpCAM+ve, CK18+ve, DAPI+ve, and CD45–ve. PD-L1 expression on CTCs was detected based on the linear intensity gradients of fluorescence signals using image acquisition on an automated fluorescence microscope. Results Among the 383 samples with baseline and follow-ups, 69.45% of patients had CTCs ranging from 1–11. Approximately 77% of patients were above the age of 50. The total number of CTCs observed was ~649 with a mean distribution of ~1.69. CTCs with PD-L1 overexpression were observed in 55.35% of patients (n = 266). Higher CTC prevalence was observed in lung cancer (24.75%), followed by colorectal cancer (21.57%) and breast cancer (5.89%). CTC clusters were observed in 10.18% of patient samples. Notably, concurrent positivity for both CTCs and PD-L1 expression was most prevalent in lung cancer patients, suggesting a potential aggressive disease phenotype and therapeutic vulnerability. Conclusions The findings support the integrated use of CTCs and their PD-L1 expression as a composite biomarker strategy to stratify patients for targeted therapies, immunotherapeutic interventions, and longitudinal monitoring. View Publication Stay One Step Ahead of Cancer. Get the latest news and innovations from Actorius delivered straight to your inbox. Subscribe for regular updates Email* Yes, subscribe me for regular updates. * Subscribe