Publications by authors named "Namita Shanbhag"

Article Synopsis
  • Advanced gastric adenocarcinoma (GAC) is challenging to study due to difficulties in obtaining matched patient specimens, limiting insights into its metastatic biology and immune responses.
  • The research involved single-cell analysis of 68 treatment-naïve primary metastatic tumors, revealing unique characteristics of liver and peritoneal metastases and how cancer cells evolve with their environment.
  • Findings indicated that GAC cells evade ferroptosis, a form of cell death, which can be targeted to enhance the effectiveness of therapies like chimeric antigen receptor T-cell therapy.
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Purpose: Claudin 18 isoform 2 (CLDN18.2) is an emerging biomarker and therapeutic target in gastric and gastroesophageal junction (G/GEJ) adenocarcinoma. This study aimed to obtain deeper understanding of CLDN18.

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Understanding tumor microenvironment (TME) reprogramming in gastric adenocarcinoma (GAC) progression may uncover novel therapeutic targets. Here, we performed single-cell profiling of precancerous lesions, localized and metastatic GACs, identifying alterations in TME cell states and compositions as GAC progresses. Abundant IgA plasma cells exist in the premalignant microenvironment, whereas immunosuppressive myeloid and stromal subsets dominate late-stage GACs.

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Advanced gastric adenocarcinoma (GAC) often leads to peritoneal carcinomatosis (PC) and is associated with very poor outcome. Here we report the comprehensive proteogenomic study of ascites derived cells from a prospective GAC cohort (n = 26 patients with peritoneal carcinomatosis, PC). A total of 16,449 proteins were detected from whole cell extracts (TCEs).

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Introduction: Gastroesophageal adenocarcinoma is relatively common in elderly patients as the incidence increases with age. However, the optimal treatment approach is not well established in this group of patients. The aim of this study is to review our experience for localized gastroesophageal adenocarcinoma in patients aged ≥80 years and to assess association between patient characteristics, clinical factors, and overall survival (OS) in order to optimize the therapeutic approaches for this population.

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Aims: This review aims to map the needs and challenges in the application of teledentistry and online referral system encountered by dental health care professionals in Indonesian primary health care centers (puskesmas) to provide safe dental health service to the population during the COVID-19 pandemic.

Materials And Methods: Literature search was undertaken of both in Indonesian and overseas context related to teledentistry. Narrative review of the literature was written to present the challenges, solutions, and application of teledentistry at Puskesmas to optimize oral health services during the COVID-19 pandemic.

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Objective: Many cancers engage embryonic genes for rapid growth and evading the immune system. SOX9 has been upregulated in many tumours, yet the role of SOX9 in mediating immunosuppressive tumour microenvironment is unclear. Here, we aim to dissect the role of SOX9-mediated cancer stemness attributes and immunosuppressive microenvironment in advanced gastric adenocarcinoma (GAC) for novel therapeutic discoveries.

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Background: G protein-coupled receptor (GPCR) is the most targeted protein family by the FDA-approved drugs. GPCR-kinase 3 (GRK3) is critical for GPCR signaling. Our genomic analysis showed that GRK3 expression correlated with poor prognosis of gastric adenocarcinoma (GAC) patients.

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Introduction: Globally people pay out-of-pocket (OOP) to access Oral healthcare services. In India, there is limited evidence on estimates of OOP expenditure. We undertook an analysis of national sample survey data on household health care expenditure to understand the expenditure pattern for Oral healthcare services and the catastrophic burden.

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Background: Gastric adenocarcinoma with peritoneal carcinomatosis (PC) is therapy resistant and leads to poor survival. To study PC in depth, there is an urgent need to develop representative PC-derived cell lines and metastatic models to study molecular mechanisms of PC and for preclinical screening of new therapies.

Methods: PC cell lines were developed from patient-derived PC cells.

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Objective: Gastro-oesophageal cancers (GEC) are resistant to therapy and lead to poor prognosis. The cancer stem cells (CSCs) and antiapoptotic pathways often confer therapy resistance. We sought to elucidate the antitumour action of a BCL-2 inhibitor, AT101 in GEC in vitro, in vivo and in a clinical trial.

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Intratumoral heterogeneity (ITH) is a fundamental property of cancer; however, the origins of ITH remain poorly understood. We performed single-cell transcriptome profiling of peritoneal carcinomatosis (PC) from 15 patients with gastric adenocarcinoma (GAC), constructed a map of 45,048 PC cells, profiled the transcriptome states of tumor cell populations, incisively explored ITH of malignant PC cells and identified significant correlates with patient survival. The links between tumor cell lineage/state compositions and ITH were illustrated at transcriptomic, genotypic, molecular and phenotypic levels.

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Objective: Prognosis of patients with advanced oesophagogastric adenocarcinoma (mEGAC) is poor and molecular determinants of shorter or longer overall survivors are lacking. Our objective was to identify molecular features and develop a prognostic model by profiling the genomic features of patients with mEGAC with widely varying outcomes.

Design: We profiled 40 untreated mEGACs (20 shorter survivors <13 months and 20 longer survivors >36 months) with whole-exome sequencing (WES) and RNA sequencing and performed an integrated analysis of exome, transcriptome, immune profile and pathological phenotypes to identify the molecular determinants, developing an integrated model for prognosis and comparison with The Cancer Genome Atlas (TCGA) cohorts.

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Context: Empathy is considered to be backbone of the patient-physician relationship. The consultation and relational empathy (CARE) measure is widely used internationally to measure empathy. However, no validated tool is available to gather patient feedback on dentists' empathy in India.

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Aim: This study was undertaken to assess the association between periodontitis and metabolic syndrome.

Materials And Methods: A case-control study was designed among 100 cases as patients with metabolic syndrome aged 35-74 years, and age- and sex-matched 100 controls as apparently healthy relatives or friends accompanying the cases visiting the diabetic outpatient department at Victoria Hospital, Bengaluru, Karnataka, India, using convenience sampling method. Information related to diabetes, hypertension, and oral hygiene practices was collected.

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Context: Dental anxiety and fear is not only a psychological problem but also a dental health problem. It is important to understand how the cognitive elements influence child's dental anxiety/fear and interact with their oral health.

Objective: This study was conducted among children to determine the association between cognitive vulnerability (CV) with dental fear and their oral health status.

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Objective: We aimed to determine whether tumor metabolism could be prognostic of cure in L-EAC patients who receive definitive chemoradiation.

Summary Background Data: Patients with inoperable localized esophageal adenocarcinoma (L-EAC) often receive definitive chemoradiation; however, biomarkers and/or imaging variables to prognosticate cure are missing.

Methods: Two hundred sixty-six patients with L-EAC who had chemoradiation but not surgery were analyzed from the prospectively maintained EAC databases in the Department of Gastrointestinal Medical Oncology at The University of Texas MD Anderson Cancer Center (Texas, USA) between March 2002 and April 2015.

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Introduction: Proactive palliative care can effectively relieve symptoms early and effectively as well as improve the quality of life of patients with gastric adenocarcinoma (GAC).

Areas Covered: The review summarizes palliative care for GAC. GAC caused specific symptoms, such as malignant gastric outlet obstruction (GOO), bleeding, weight loss, and/or ascites, therefore, these symptoms must be addressed specifically.

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Purposes: Preoperative chemoradiation is a potential treatment option for localized gastric adenocarcinoma (GAC). Currently, the response to chemoradiation cannot be predicted. We analyzed the pretreatment maximum standardized uptake value (SUV) and total lesion glycolysis (TLG) on positron emission tomography/computed tomography as potential predictors of the response to chemoradiation.

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Background: As cancer patients are surviving longer, more patients manifest brain metastases (BRMs). However, the rate of BRMs from upper gastrointestinal cancer is unclear. We therefore evaluated the frequency and prognostic effect of BRMs in this setting.

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Objective: Peritoneal carcinomatosis (PC; malignant ascites or implants) occurs in approximately 45% of advanced gastric adenocarcinoma (GAC) patients and associated with a poor survival. The molecular events leading to PC are unknown. The yes-associated protein 1 () oncogene has emerged in many tumour types, but its clinical significance in PC is unclear.

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Background: Approximately one third of needle biopsies that are performed to rule out malignancy of indeterminate pulmonary nodules detected radiologically during lung cancer screening are negative, thus exposing cancer-free patients to risks of pneumothorax, bleeding, and infection. A noninvasive confirmatory tool (eg, liquid biopsy) is urgently needed in the lung cancer diagnosis setting to stratify patients who should receive biopsy versus those who should be monitored.

Methods: A novel antigen-independent, 4-color fluorescence in situ hybridization (FISH)-based method was developed to detect circulating tumor cells (CTCs) with abnormalities in gene copy numbers in mononuclear cell-enriched peripheral blood samples from patients with (n = 107) and without (n = 100) lung cancer.

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Background: Empathy is one of the major essential elements in patient and dentist relationship. Interpersonal Reactivity Index (IRI) has been used extensively to measure empathy among medical and other health professions. However, its validity in dental profession remains to be explored.

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Hippo/YAP1 signaling is a major regulator of organ size, cancer stemness, and aggressive phenotype. Thus, targeting YAP1 may provide a novel therapeutic strategy for tumors with high YAP1 expression in esophageal cancer (EC). Chromatin immunoprecipitation (ChiP) and quantitative ChiP-PCR were used to determine the regulation of the chromatin remodeling protein bromodomain-containing protein 4 (BRD4) on YAP1.

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Article Synopsis
  • The study aimed to assess how often paratracheal lymph nodes (LNs) are affected by metastases in patients with esophageal cancer and how this impacts their prognosis.
  • Out of 1,199 patients analyzed, 6.1% had positive paratracheal LNs at diagnosis, with a median overall survival of 2.10 years, and recurrence often led to shorter survival rates.
  • The research found that the location of the tumor correlates with the likelihood of paratracheal LN metastases, with higher rates associated with tumors closer to the esophagogastric junction.
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