Ceftaroline is a fifth-generation broad-spectrum cephalosporin with potent antimicrobial activity against Gram-positive and Gram-negative pathogens. Ceftaroline is the bioactive metabolite of ceftaroline fosamil, an N-phosphonoamino water-soluble cephalosporin prodrug, which is rapidly converted in vivo upon the hydrolysis of the phosphonate group by plasma phosphatises. Ceftaroline fosamil is being developed by Forest Laboratories, under a license from Takeda. In 2010, the U.S. Food and Drug Administration (FDA) approved ceftaroline fosamil for use in the treatment of acute bacterial skin and skin structure infections as well as community-acquired pneumonia. Ceftaroline has bactericidal activity against methicillin-resistant Staphylococcus aureus, therefore serving as an attractive alternative agent for the treatment of methicillin-resistant Staphylococcus aureus bacteremia when approved agents are contraindicated or treatment failures have occurred. Like other β-lactams, ceftaroline’s mechanism of action is mediated by binding to the penicillin-binding protein (PBP), the enzyme mediating the cross-linking transpeptidation of the peptidoglycan which are the terminal steps in completing formation of the bacterial cell wall. MRSA strains have a mutated PBP2a which prohibits β-lactam antibiotics from accessing its active site that mediates the transpeptidation reaction. Ceftaroline possesses an ethoxyimino side-chain mimicking a portion of a cell wall structure, which acts as a “Trojan horse”, allosterically opening and facilitating access to the active site of the PBP2a. Based on clinical trial data to date, ceftaroline appears to be safe and well-tolerated. Since ceftaroline is a cephalosporin, it has caused serious hypersensitivity reactions in patients who are allergic to cephalosporins and among some patients with penicillin allergies.

1,1-DIETHYL-4-PHENYLHOMOPIPERAZINIUM (ASM-024), a small synthetic molecule in clinical stage development, has shown activity at the level of nicotinic receptors and possibly at the muscarinic level and presents anti-inflammatory and bronchodilator properties. Aerosolized ASM-024 reduces airway resistance in mice and promotes in-vitro relaxation of tracheal and bronchial preparations from animal and human tissues. ASM-024 increased in vitro relaxation response to maximally effective concentration of short-acting beta-2 agonists in dog and human bronchi. ASM-024 is able to activate the α7 nAChR channel opening in the presence of the positive allosteric modulator (PNU-120596), indicating that ASM-024 behaves as a ‘silent agonist’ that places the receptor in a desensitized state. Compounds with similar properties have been shown to induce signal transduction pathways independently of ion channel activation. ASM-024 has demonstrated an antagonist effect on ACH-evoked activation at the M1, M2 and M3 muscarinic receptors expressed in Xenopus oocytes. A comprehensive nonclinical safety program was conducted with ASM-024 including pharmacokinetic and metabolism studies, safety pharmacology studies, toxicology and genotoxicity studies. In all, seven clinical studies were completed to evaluate the safety, tolerability and clinical activity of ASM-024. Three Phase I and four Phase II clinical trials were conducted on healthy subjects and patients with mild allergic asthma, stable moderate asthma and subjects with COPD. Altogether, ASM-024 has been safely administered to more than 200 subjects via the oral and inhalation delivery, i.e. nebulized solution and dry powder inhalation. However, the outcome of two phase II pilot studies in patients failed to demonstrate sufficient efficacy of ASM-024 in asthma and COPD. Thus, further work on ASM-024 on pulmonary diseases was stopped. In light of the findings that ASM‐024 blocks both nicotinic and muscarinic receptor activation, it is believed that ASM-024 will be a potent inhibitor of cell growth. These properties may have the potential to reduce the development or progression of tumors expressing these receptors. Based on a greater knowledge of the unique pharmacological mechanisms of action of ASM-024 developed at Asmacure, Odan is exploring the potential therapeutic role of ASM-024 in the treatment of selected oncology diseases. These studies include the in vitro anti-proliferative properties against a panel of various cancer cell lines and the in vivo anti-tumor activity in selected mouse models. Overall, the most significant inhibitory effect on in vitro cell proliferation was observed on the following cell lines: human lung adenocarcinoma, breast cancer, brain neuroblastoma, prostate adenocarcinoma and malignant melanoma. Preliminary data from a mouse model of lung carcinoma (Lewis Lung Cancer) using a slow infusion delivery method that ASM-024 treatment reduces the size and number of tumor nodules in the lung. In addition the potential therapeutic synergism between ASM-024 with commonly used chemotherapeutic agents will be investigated. Cisplatin and the taxanes (e.g. paclitaxel or Taxol) are commonly used chemotherapeutic agents, but their use is limited by their toxicity rates and innate or acquired resistance to these drugs. The concomitant effect of ASM-024 and cisplatin or Taxol on the proliferation of tumor cells will be assessed in vitro and potentially in in vivo mouse models. In the long term, Odan will consider to pursue the development of ASM-024 in a solution formulation administered intravenously (IV) in conjunction with the commonly-used cancer chemotherapeutic agents, for the growth inhibition and possibly regression of tumors in cancer patients.