Xinjiachalcone A is a natural product isolated from Glycyrrhiza inflata Batalin. Xinjiachalcone A shows both a low MIC and a strong bactericidal activity against H. pylori(MIC : 12.5 to 50 µM, seventeen H. pylori strains).
Actinopyrone A is a pyrone isolated from S. pactum with diverse biological activities. It has selective and potent antimicrobial activity against H. pylori (MIC = 0.1 ng/mL) with no activity against other Gram-negative bacteria including E. coli, K. pneumoniae, P. aeruginosa, and B. fragilis. Actinopyrone A also mildly inhibits growth of Gram-positive bacteria and dermatophytes with MIC values ranging from <6.25 to 25 μg/mL. Intravenous administration of actinopyrone A (30 μg/kg) increases coronary blood flow in dogs by 196.2%.
cis-9,10-Methyleneoctadecanoic acid is a cyclopropane fatty acid that has been found in bacteria and the digestive gland of P. globosa. It is a component of S. aureus cell membranes and levels decrease upon treatment with carvacrol. cis-9,10-Methyleneoctadecanoic acid is secreted by H. pylori and enhances histamine- and dibutyryl cAMP-stimulated acid secretion in isolated guinea pig parietal cells. It also activates protein kinase C (PKC) in a calcium-dependent manner.
Zonisamide-13C2,15N is intended for use as an internal standard for the quantification of zonisamide by GC- or LC-MS. Zonisamide (T0267) is an antiepileptic agent.1 It selectively inhibits the repeated firing of sodium channels (IC50 = 2 μg/ml)in mouse embryo spinal cord neurons and inhibits spontaneous channel firing when used at concentrations greater than 10 μg/ml.2 In rat cerebral cortex neurons,zonisamide (1-1,000 μM)inhibits T-type calcium channels with a maximum reduction of 60% of the calcium current.3 Zonisamide (T0267)inhibits H. pylori recombinant carbonic anhydrase (CA)and the human CA isoforms I,II,and V with Ki values of 218,56,35,and 21 nM,respectively.4,5 In mice,it has anticonvulsant activity against maximal electroshock seizure (MES)and pentylenetetrazole-induced maximal,but not minimal,seizures (ED50s = 19.6,9.3,and >500 mg/kg,respectively). Zonisamide (T0267) (40 mg/kg,p.o.)prevents MPTP-induced decreases in the levels of dopamine ,but not homovanillic acid or dihydroxyphenyl acetic acid ,and increases MPTP-induced decreases in the dopamine turnover rate in mouse striatum in a model of Parkinson's disease.6 Formulations containing zonisamide have been used in the treatment of partial seizures in adults with epilepsy.
6,8-Diprenylorobol possesses weaker anti-H. pylori activity, it may be a useful chemopreventive agent for peptic ulcer or gastric cancer in H. pylori-infected individuals.