TS-002302 — Acute myeloid leukemia (AML) causes myeloid cells to interfere with the production of healthy white blood cells, red blood cells and platelets; patients will experience fatigue, easy bruising, infections, etc. Due to expansion ex vivo with IL-15, AML patients and donors’ natural killer (NK) cells have an increase in glycogen synthase kinase 3 beta (GSK3β) from the loss of cytotoxicity and defective metabolism. Researchers at Nationwide Children’s Hospital targeted GSK3β in NK cells to promote antitumor activity by expanding NK cells with feeder cells expressing membrane-bound IL-21 without altering the GSK3β levels. They deleted GSK3β using the cas9/RNP and expanding paired-donor knock out and wild-type NK cells. When assessing transcriptional and functional alterations induced by the loss of GSK3β, GSK3β-KO cells demonstrated changes in gene expressions that suggested possible metabolic reprogramming and exhibited 150% higher spare respiratory capacity, a marker for metabolic fitness. By using mbIL21 expansion in the expansion of NK cells and GSK3β in these cells, the upregulation of GSK and drug inhibitors is prevented.

TS-000972 — Natural Killer (NK) cells express a range of receptors to activate or inhibit certain cellular behavior to kill cancer cells. When an NK cell is deficient or dysfunctional, the efficiency of the NK cells is severely limited. VISTA is a protein sequence that activates T cells and acts as a moderator for the immune system. It has low-to-moderate expression but has been the target of study by a team of researchers at Nationwide Children’s Hospital led by Dr. Dean Lee. By removing VISTA in expanded NK cells, the inhibitory signal will be eliminated and thus resulting in an enhanced ability of NK cells to target cancers and overcome the immune-suppressive signals for improved cancer immunotherapy.

TS-000841 — Natural Killer (NK) cells express a range of receptors to activate or inhibit certain cellular behavior to kill cancer cells. In a group study it was found that by using TGFb-imprinting, NK cells are driven to a pro-inflammatory phenotype with hypersecretion of IFN-γ, TNF-α, and GM- CSF. These cells, now TGFbi, had decreased degrees of CD38 at both the RNA and the protein level. Studies performed by Drs. Dean Lee and Marcelo Pereira found that CD38 NK cells can be utilized to target CD38+ multiple myeloma patients and improve their progression-free survival by avoiding death of healthy surrounding cells, as well as enhancement of NK cell function.

TS-000834 — Cancer and their tumors create and thrive in a microenvironment that is highly immune suppressant. By targeting specific genes and genetically modifying natural killer (NK) cells, the clinical outcomes of cancer immunotherapy have the advanced ability to overcome these diseases. NK cells in solid tumors have been reported to exhibit an inactive and dysfunctional state, and expanded NK cells under hypoxic conditions showed a decrease in cytotoxic ability. Drs. Dean Lee and Marcelo Pereira found that by using the developed approach that focuses on Cas9/RNP, the HIF1a in NK cells can permanently overcome the effects of hypoxia without the noted disadvantages of small-molecule inhibitors.