Table 1.
Model/Cell Type | Investigational Strategy to Inhibit MARCKS Function | Significant Finding(s) for MARCKS Function | References | |
---|---|---|---|---|
Acellular models | Computational models | ED peptide | MARCKS sequesters PIP2 through electrostatic interactions | 53 |
Lipid models | ED peptide | MARCKS sequesters PIP2/PIP3, regulates PIP2 availability as PI3K substrate | 54, 60, 61 | |
Cells in vitro | Neutrophils | N-terminal peptide (MANS), BIO-11006 | MARCKS involved in directed migration, adhesion, respiratory burst, cytokine production, and degranulation | 8, 21, 93, 94, 100 |
Macrophages | MANS, siRNA | MARCKS involved in directed migration and cytokine production | 13, 96 | |
Mast cells | ED peptide | MARCKS involved in degranulation | 130 | |
Fibroblasts | MANS, siRNA | MARCKS involved in directed migration | 15, 16 | |
Stem cells | MANS | MARCKS involved in directed migration | 95 | |
Airway goblet cells | MANS, BIO-11006 | MARCKS involved in mucin secretion | 18, 92, 97, 100, 108–111, 113–115 | |
Vascular smooth muscle cells | siRNA, mutated protein expression | MARCKS involved in adhesion and α5β1 integrin function | 138 | |
Endothelial cells | siRNA | MARCKS involved in directed migration | 63, 139 | |
Lung cancer cells | MANS, siRNA, BIO-11006, ED peptide, mutated protein expression | NSCLC cells: elevated p-MARCKS expression, MARCKS involved in cancer cell migration, MARCKS enhances radiation sensitivity | 12, 104, 141–143, 163 | |
In vivo, animal models | Mouse mucus hypersecretion/allergic inflammation models | MANS, BIO-11006 | MARCKS involved in airway mucin secretion and inflammation | 17, 20, 98, 107 |
Mouse ALI/ARDS models | BIO-11006, MANS | MARCKS pulmonary inflammation and ALI | 22, 23 | |
Mouse lung cancer models | MANS, BIO-11006, ED peptide | MARCKS involved in metastasis and tumor growth | 12, 99, 164 | |
Human clinical trials | Healthy volunteers | Inhaled BIO-11006 | Safe pulmonary and systemic profile | Clinical Trials BIM-CL-001, BIM-CL-002 |
Chronic bronchitis | Inhaled BIO-11006: 172 subjects with COPD, double-blind, placebo-controlled, multicenter dose escalation study for 21 d | 75 mg twice daily increased proportion of clinically significant FEV1 response | 136, Clinical Trial BIM-CL-003 | |
ARDS | Inhaled BIO-11006: 40 ventilated ICU patients, randomized, placebo- controlled trial | Expected 2019 | Clinical Trial BIM-CL-005 | |
NSCLC | Inhaled BIO-11006: randomized, SOC controlled trial | Expected 2019 | Clinical Trial BIM-NSCLC-001 |
Definition of abbreviations: ALI = acute lung injury; ARDS = acute respiratory distress syndrome; COPD = chronic obstructive pulmonary disease; ED = effector domain; ICU = intensive care unit; MANS = myristoylated N-terminal sequence; MARCKS = myristoylated alanine-rich C kinase substrate; NSCLC = non–small cell lung cancer; PIP2 = phosphatidylinositol 4,5-bisphosphate; PIP3 = phosphatidylinositol (3,4,5)-trisphosphate; p-MARCKS = phosphorylated MARCKS; SOC = standard of care.