Prof. Sarit Larisch
Head of Cell Death and Cancer Research Laboratory
Research areas:
- p53 regulation and cancer therapy
We discovered that ARTS is a direct transcriptional target of p53 and uncovered a novel ARTS-XIAP-p53 regulatory axis controlling p53 stability through the ubiquitin–proteasome system. This work identifies XIAP as a druggable E3 ligase for p53 and provides a new strategy to restore p53 activity with ARTS-mimetic compounds in cancers with impaired p53 regulation. - PROTAC-like small molecules targeting XIAP and Bcl-2
We identified and developed small-molecule ARTS mimetics that function in a PROTAC-like manner to selectively bind and promote proteasomal degradation of XIAP and Bcl-2. These compounds directly bind to XIAP and Bcl-2 and selectively induce apoptosis in cancer cells while sparing normal cells, including in a mouse neuroblastoma model. This establishes a strong foundation for first-in-class apoptosis-based therapeutics. - Preventing breast cancer and intercepting early disease
We have discovered that pharmacological activation of the ARTS-XIAP pathway reverses early premalignant changes in breast patient-derived breast organoids back to a normal epithelial state, while selectively killing malignant breast cancer cells and sparing normal epithelium. This approach defines a new strategy for early cancer interception that is particularly relevant for high-risk populations, such as BRCA1/2 mutation carriers. - Inflammatory bowel disease and XIAP modulation
We identified a critical role for ARTS-XIAP dysregulation in excessive epithelial cell death and inflammation in IBD (Inflammatory Bowel Disease models). Our work opens a new therapeutic avenue aimed at restoring normal XIAP function to reduce tissue damage and inflammation, with the potential to benefit millions of IBD patients worldwide.
Sarit Larisch is Professor and Head of Cell Death and Cancer Research Laboratory at the University of Haifa, and past chair of the Departments of Biology and Medical Sciences. She received her Ph.D. from the Hebrew University-Hadassah Medical School and conducted her post-doctoral studies at the National Cancer Institute in Bethesda, USA. She discovered the ARTS protein and devoted her career to understanding its role in cancer as basis for developing novel anti-cancer therapies. She received many awards, including the Wolfson Trust Award and the Johnson & Johnson Focused Funding Award. Prof. Larisch holds eleven patents and patent applications.
The lab investigates how apoptotic signaling can be harnessed for disease prevention and therapy. A major contribution of my work is the discovery of ARTS, a tumor suppressor protein whose expression is frequently lost in human cancers. Genetic studies in ARTS-deficient mice demonstrated spontaneous tumor development, establishing ARTS as a physiological tumor suppressor. ARTS is a direct antagonist of XIAP. We have identified small molecules that show high affinity for the unique binding site of ARTS in Bir3/XIAP and promote efficient killing of a wide variety of cancer cells.
Prof. Sarit Larisch
Head of Cell Death and Cancer Research Laboratory
Research areas:
- p53 regulation and cancer therapy
We discovered that ARTS is a direct transcriptional target of p53 and uncovered a novel ARTS-XIAP-p53 regulatory axis controlling p53 stability through the ubiquitin–proteasome system. This work identifies XIAP as a druggable E3 ligase for p53 and provides a new strategy to restore p53 activity with ARTS-mimetic compounds in cancers with impaired p53 regulation. - PROTAC-like small molecules targeting XIAP and Bcl-2
We identified and developed small-molecule ARTS mimetics that function in a PROTAC-like manner to selectively bind and promote proteasomal degradation of XIAP and Bcl-2. These compounds directly bind to XIAP and Bcl-2 and selectively induce apoptosis in cancer cells while sparing normal cells, including in a mouse neuroblastoma model. This establishes a strong foundation for first-in-class apoptosis-based therapeutics. - Preventing breast cancer and intercepting early disease
We have discovered that pharmacological activation of the ARTS-XIAP pathway reverses early premalignant changes in breast patient-derived breast organoids back to a normal epithelial state, while selectively killing malignant breast cancer cells and sparing normal epithelium. This approach defines a new strategy for early cancer interception that is particularly relevant for high-risk populations, such as BRCA1/2 mutation carriers. - Inflammatory bowel disease and XIAP modulation
We identified a critical role for ARTS-XIAP dysregulation in excessive epithelial cell death and inflammation in IBD (Inflammatory Bowel Disease models). Our work opens a new therapeutic avenue aimed at restoring normal XIAP function to reduce tissue damage and inflammation, with the potential to benefit millions of IBD patients worldwide.
Sarit Larisch is Professor and Head of Cell Death and Cancer Research Laboratory at the University of Haifa, and past chair of the Departments of Biology and Medical Sciences. She received her Ph.D. from the Hebrew University-Hadassah Medical School and conducted her post-doctoral studies at the National Cancer Institute in Bethesda, USA. She discovered the ARTS protein and devoted her career to understanding its role in cancer as basis for developing novel anti-cancer therapies. She received many awards, including the Wolfson Trust Award and the Johnson & Johnson Focused Funding Award. Prof. Larisch holds eleven patents and patent applications.
The lab investigates how apoptotic signaling can be harnessed for disease prevention and therapy. A major contribution of my work is the discovery of ARTS, a tumor suppressor protein whose expression is frequently lost in human cancers. Genetic studies in ARTS-deficient mice demonstrated spontaneous tumor development, establishing ARTS as a physiological tumor suppressor. ARTS is a direct antagonist of XIAP. We have identified small molecules that show high affinity for the unique binding site of ARTS in Bir3/XIAP and promote efficient killing of a wide variety of cancer cells.