Alireza Tojjari

Dr. Alireza Tojjari

Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 August 2023 in Vaccines
Verified
Journal Article
Open access
PDF file
ATAlireza Tojjari
Alireza Tojjari
ASAhmed Saeed
Ahmed Saeed
MSMeghana Singh
Meghana Singh
LCLudimila Cavalcante
Ludimila Cavalcante
ISIbrahim Sahin
Ibrahim Sahin
ASAnwaar Saeed
Anwaar Saeed
HCC, the most prevalent form of primary liver cancer, presents a substantial global health challenge due to its high mortality and limited therapeutic options. This review delves into the potential of cancer vaccines as a novel therapeutic avenue for HCC. We examine the various categories of cancer vaccines, including peptide-based, dendritic cell-based, viral vector-based, DNA, and mRNA vaccines, and their potential application in HCC management. This review also addresses the inherent challenges in vaccine development, such as tumor heterogeneity and the need for identifying tumor-specific antigens. We underscore the role of cancer vaccines in reshaping the immune environment within HCC, fostering durable immune memory, and their potential in combination therapies. The review also evaluates clinical trials and emphasizes the necessity for more extensive research to optimize vaccine design and patient selection criteria. We conclude with future perspectives, highlighting the significance of personalized therapies, innovative antigen delivery platforms, immune modulatory agents, and predictive biomarkers in revolutionizing HCC treatment. Simple Summary: This review explores the potential of cancer vaccines as a promising therapeutic strategy for hepatocellular carcinoma (HCC), a prevalent and deadly liver cancer. The authors discuss various types of cancer vaccines, their challenges, and their role in modulating the immune response within HCC. They also highlight clinical trials and future perspectives, emphasizing the importance of personalized therapies, novel antigen delivery platforms, and predictive biomarkers. The findings from this research could significantly impact the research community by providing a comprehensive understanding of the current state of cancer vaccines for HCC, thereby guiding future research and potentially transforming HCC treatment strategies.

3 December 2024 in Cancer Letters
Verified
Journal Article
Open access
ATAlireza Tojjari
Alireza Tojjari
YIYassine Alami Idrissi
Yassine Alami Idrissi
ASAnwaar Saeed
Anwaar Saeed
Recently, the molecular landscape of gastric and pancreatic cancers has advanced with Claudin 18.2 (CLDN18.2) emerging as a promising therapeutic target. Claudin 18.2, a tight junction protein, is selectively expressed in cancer cells and minimally in normal tissues, making it an attractive candidate for targeted therapy. Therapies like monoclonal antibodies (e.g., zolbetuximab), bispecific antibodies, and antibody-drug conjugates have shown significant potential in improving clinical outcomes. Early-phase clinical trials demonstrate robust antitumor activity, particularly in combination with chemotherapy and immunotherapy regimens. However, challenges such as patient selection, resistance mechanisms, and toxicity management remain critical. This review highlights the therapeutic landscape, clinical advancements, and future directions of targeting Claudin 18.2 in gastric and pancreatic cancer treatment.

28 August 2023 in Cancers
Verified
Journal Article
Open access
PDF file
ATAlireza Tojjari
Alireza Tojjari
KCKhalil Choucair
Khalil Choucair
ASArezoo Sadeghipour
Arezoo Sadeghipour
ASAzhar Saeed
Azhar Saeed
ASAnwaar Saeed
Anwaar Saeed
Colorectal cancer (CRC) remains a leading cause of death from cancer worldwide, with increasing incidence in the Western world. Diet has become the focus of research as a significant risk factor for CRC occurrence, and the role of dietary polyunsaturated fatty acids (PUFAs) has become an area of interest given their potential role in modulating inflammation, particularly in the pro-carcinogenic inflammatory environment of the colon. This work reviews the main types of PUFAs, their characteristics, structure, and physiologic role. We then highlight their potential role in preventing CRC, their signaling function vis-à-vis tumorigenic signaling, and their subsequent potential role in modulating response to different treatment modalities. We review pre-clinical and clinical data and discuss their potential use as adjunct therapies to currently existing treatment modalities. Given our understanding of PUFAs’ immune and inflammation modulatory effects, we explore the possible combination of PUFAs with immune checkpoint inhibitors and other targeted therapies.

13 November 2023 in Cancers
Verified
Journal Article
Open access
PDF file
ATAlireza Tojjari
Alireza Tojjari
ASAnwaar Saeed
Anwaar Saeed
ASArezoo Sadeghipour
Arezoo Sadeghipour
RKRazelle Kurzrock
Razelle Kurzrock
LCLudimila Cavalcante
Ludimila Cavalcante
SHP2 (Src Homology 2 Domain-Containing Phosphatase 2) is a protein tyrosine phosphatase widely expressed in various cell types. SHP2 plays a crucial role in different cellular processes, such as cell proliferation, differentiation, and survival. Aberrant activation of SHP2 has been implicated in multiple human cancers and is considered a promising therapeutic target for treating these malignancies. The PTPN11 gene and functions encode SHP2 as a critical signal transduction regulator that interacts with key signaling molecules in both the RAS/ERK and PD-1/PD-L1 pathways; SHP2 is also implicated in T-cell signaling. SHP2 may be inhibited by molecules that cause allosteric (bind to sites other than the active site and attenuate activation) or orthosteric (bind to the active site and stop activation) inhibition or via potent SHP2 degraders. These inhibitors have anti-proliferative effects in cancer cells and suppress tumor growth in preclinical models. In addition, several SHP2 inhibitors are currently in clinical trials for cancer treatment. This review aims to provide an overview of the current research on SHP2 inhibitors, including their mechanism of action, structure-activity relationships, and clinical development, focusing on immune modulation effects and novel therapeutic strategies in the immune-oncology field.

24 July 2024 in Frontiers in Bioscience-Landmark
Verified
Journal Article
Open access
PDF file
ATAlireza Tojjari
Alireza Tojjari
Abdelrahman HafezAbdelrahman Hafez
Abdelrahman Hafez
ASAli Saeed
Ali Saeed
MSMeghana Singh
Meghana Singh
ASAnwaar Saeed
Anwaar Saeed
Liver cancer, primarily hepatocellular carcinoma (HCC), is the second leading cause of cancer-related deaths globally. It is typically characterized by rapid progression, poor prognosis, and high mortality rates. Given these challenges, the search for molecular targets aiding early diagnosis and targeted therapy remains imperative. Glypican 3 (GPC3), a cell-surface glycoprotein, emerges as a promising candidate for addressing HCC Overexpressed in HCC tissues; GPC3 is a credible immunohistochemical marker for liver cancer diagnosis and a potential marker for liquid biopsy through soluble GPC3 in serum. Various immunotherapies targeting GPC3 have been developed, including vaccines, anti-GPC3 immunotoxins, and chimeric antigen receptor-modified cells. This review comprehensively covers the structure, physicochemical properties, biological functions, and clinical applications of GPC3. It explores diagnostic and treatment strategies centered around GPC3, offering hope for improved early detection and targeted therapies in the challenging landscape of HCC.

5 March 2024 in Cancers
Verified
Journal Article
Open access
ATAlireza Tojjari
Alireza Tojjari
JYJames Yu
James Yu
ASAnwaar Saeed
Anwaar Saeed
Hepatocellular carcinoma (HCC), a prevalent and often fatal liver cancer, presents significant treatment challenges, especially in its advanced stages. This article delves into the promising approach of combining immunotherapy, particularly immune checkpoint inhibitors, with radiation therapy, a cornerstone of HCC management. Our review synthesizes current preclinical and clinical research, highlighting the potential synergistic effects of this combinational treatment. Emerging evidence suggests that this synergy enhances tumor control and improves patient survival rates. The combination leverages the localized, tumor-targeting ability of radiation therapy and the systemic, immune-boosting effects of immunotherapy, potentially overcoming the limitations inherent in each treatment modality when used separately. This integrative approach is especially promising in addressing the complex tumor microenvironment of HCC. However, the treatment landscape is nuanced, with challenges such as patient-specific response variability and potential resistance to therapies. Future research directions should focus on refining these combination strategies, tailoring them to individual patient profiles, and understanding the underlying mechanisms that govern the interaction between immunotherapy and radiation therapy. Such advancements could significantly improve HCC management, setting new standards for patient care and treatment efficacy.