Inhibitory effect of naphthoquine phosphate on Babesia gibsoni in vitro and Babesia rodhaini in vivo.

BACKGROUND: Drug resistance and toxic side effects are major challenges in the treatment of babesiosis. As such, new drugs are needed to combat the emergence of drug resistance in Babesia parasites and to develop alternative treatment strategies. A combination of naphthoquine (NQ) and artemisinin is an antimalarial therapy in pharmaceutical markets. The present study repurposed NQ as a drug for the treatment of babesiosis by evaluating the anti-Babesia activity of naphthoquine phosphate (NQP) alone. METHODS: An in vitro growth inhibition assay of NQP was tested on Babesia gibsoni cultures using a SYBR Green I-based fluorescence assay. In addition, the in vivo growth inhibitory effect of NQP was evaluated using BALB/c mice infected with Babesia rodhaini. The parasitemia level and hematocrit values were monitored to determine the therapeutic efficacy of NQP and the clinical improvements in NQP-treated mice. RESULTS: The half maximal inhibitory concentration of NQP against B. gibsoni in vitro was 3.3 ± 0.5 µM. Oral administration of NQP for 5 consecutive days at a dose of 40 mg/kg of body weight resulted in significant inhibition of B. rodhaini growth in mice as compared with that of the control group. All NQP-treated mice survived, whereas the mice in the control group died between days 6 and 9 post-infection. CONCLUSION: This is the first study to evaluate the anti-Babesia activity of NQP in vitro and in vivo. Our findings suggest that NQP is a promising drug for treating Babesia infections, and drug repurposing may provide new treatment strategies for babesiosis.

A Randomized, Placebo-Controlled Laboratory Classroom Study of the Efficacy and Safety of Dasotraline in Children With ADHD.

OBJECTIVE: To evaluate the efficacy of dasotraline 2 mg/day for treatment of ADHD in children weighing ≤30 kg. METHOD: Children (ages 6-12) with ADHD were randomized to 14 days of once-daily evening doses of dasotraline 2 mg (n = 47) or placebo (n = 48). Efficacy was assessed at Baseline and day-15 in seven, 30-minutes classroom sessions on each day (8:00 a.m. to 8:00 p.m.; 12-24 hours post-dose). The primary endpoint was change from Baseline at Day-15 in the Swanson, Kotkin, Agler, M-Flynn, and Pelham (SKAMP) combined score averaged over the seven, serial timepoints. RESULTS: Treatment with dasotraline was associated with significant improvement versus placebo in the primary SKAMP-combined score (least squares mean [SE] change from Baseline at Day-15: -3.67 [0.775] vs. +1.57 [0.773]; p < .001; effect size, 1.04). CONCLUSION: Dasotraline 2 mg/day was found to be efficacious and generally well tolerated in this placebo-controlled, laboratory classroom study of children ages 6 to 12 years with ADHD. CLINICALTRIALS.GOV IDENTIFIER: NCT03231800.

Efficacy and safety of dasotraline in adults with binge-eating disorder: a randomized, placebo-controlled, fixed-dose clinical trial.

OBJECTIVE: The aim of this fixed-dose study was to evaluate the efficacy and safety of dasotraline in the treatment of patients with binge-eating disorder (BED). METHODS: Patients meeting Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition criteria for BED were randomized to 12 weeks of double-blind treatment with fixed doses of dasotraline (4 and 6 mg/d), or placebo. The primary efficacy endpoint was change in number of binge-eating (BE) days per week at week 12. Secondary efficacy endpoints included week 12 change on the BE CGI-Severity Scale (BE-CGI-S) and the Yale-Brown Obsessive-Compulsive Scale Modified for BE (YBOCS-BE). RESULTS: At week 12, treatment with dasotraline was associated with significant improvement in number of BE days per week on the dose of 6 mg/d (N = 162) vs placebo (N = 162; -3.47 vs -2.92; P = .0045), but not 4 mg/d (N = 161; -3.21). Improvement vs placebo was observed for dasotraline 6 and 4 mg/d, respectively, on the BE-CGI-S (effect size [ES]: 0.37 and 0.27) and on the YBOCS-BE total score (ES: 0.43 and 0.29). The most common adverse events on dasotraline were insomnia, dry mouth, headache, decreased appetite, nausea, and anxiety. Changes in blood pressure and pulse were minimal. CONCLUSION: Treatment with dasotraline 6 mg/d (but not 4 mg/d) was associated with significantly greater reduction in BE days per week. Both doses of dasotraline were generally safe and well-tolerated and resulted in global improvement on the BE-CGI-S, as well as improvement in BE related obsessional thoughts and compulsive behaviors on the YBOCS-BE. These results confirm the findings of a previous flexible dose study.

Mapping TRPM7 Function by NS8593.

The transient receptor potential cation channel, subfamily M, member 7 (TRPM7) is a ubiquitously expressed membrane protein, which forms a channel linked to a cytosolic protein kinase. Genetic inactivation of TRPM7 in animal models uncovered the critical role of TRPM7 in early embryonic development, immune responses, and the organismal balance of Zn2+, Mg2+, and Ca2+. TRPM7 emerged as a new therapeutic target because malfunctions of TRPM7 have been associated with anoxic neuronal death, tissue fibrosis, tumour progression, and giant platelet disorder. Recently, several laboratories have identified pharmacological compounds allowing to modulate either channel or kinase activity of TRPM7. Among other small molecules, NS8593 has been defined as a potent negative gating regulator of the TRPM7 channel. Consequently, several groups applied NS8593 to investigate cellular pathways regulated by TRPM7. Here, we summarize the progress in this research area. In particular, two notable milestones have been reached in the assessment of TRPM7 druggability. Firstly, several laboratories demonstrated that NS8593 treatment reliably mirrors prominent phenotypes of cells manipulated by genetic inactivation of TRPM7. Secondly, it has been shown that NS8593 allows us to probe the therapeutic potential of TRPM7 in animal models of human diseases. Collectively, these studies employing NS8593 may serve as a blueprint for the preclinical assessment of TRPM7-targeting drugs.

Efficacy and Safety of Dasotraline in Adults With Binge-Eating Disorder: A Randomized, Placebo-Controlled, Flexible-Dose Clinical Trial.

OBJECTIVE: Binge-eating disorder (BED) is the most prevalent eating disorder; however, few evidence-based treatments are available. The aim of this study was to evaluate the efficacy and safety of dasotraline, a novel dopamine and norepinephrine reuptake inhibitor, in adults with BED. METHODS: Patients with a DSM-5 diagnosis of BED (intent-to-treat sample, N = 315) were randomized to 12 weeks of double-blind treatment with once-daily, flexible doses (4, 6, or 8 mg/d) of dasotraline or placebo. Primary endpoint was change in diary-based assessment of number of binge-eating days per week at week 12. Key secondary endpoints included changes from baseline in Clinical Global Impressions-Severity of Illness scale (CGI-S) and Yale-Brown Obsessive Compulsive Scale Modified for Binge-Eating (YBOCS-BE) and percentage of subjects with cessation of binge eating in the final 4 weeks. RESULTS: Treatment with dasotraline was associated with a significantly greater reduction in binge-eating days per week at study endpoint (vs placebo; least squares mean [SE] difference score, -0.99 [0.17]; P < .0001; effect size [ES], 0.74). Significant endpoint improvement was observed for the 3 key secondary measures, CGI-S (P < .0001; ES, 0.95), YBOCS-BE (P < .0001; ES, 0.96), and 4-week cessation of binge eating (46.5% vs 20.6%; P < .0001). The most common adverse events in the dasotraline vs placebo groups were insomnia (44.6% vs 8.1%), dry mouth (27.4% vs 5.0%), decreased appetite (19.7% vs 6.9%), and anxiety (17.8% vs 2.5%). Discontinuation due to adverse events occurred in 11.3% of patients on dasotraline vs 2.5% on placebo. CONCLUSIONS: The results of this placebo-controlled, double-blind study found dasotraline to be an efficacious, safe, and generally well-tolerated treatment for BED. TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT02564588.

Efficacy and Safety of Dasotraline in Children With ADHD: A Laboratory Classroom Study.

Objective: To evaluate the efficacy and safety of dasotraline for treatment of ADHD in children. Method: Children (ages 6-12 years; N = 112) with ADHD were randomized, double-blind, to 14 days of once-daily evening doses of dasotraline 4 mg or placebo. ADHD symptom severity was measured at baseline and Day 15 in seven, 30-min classroom sessions using the Swanson, Kotkin, Agler, M-Flynn, and Pelham (SKAMP) and the Permanent Product Measure of Performance (PERMP) math test. Results: Significant improvement was observed for dasotraline versus placebo in the SKAMP-combined score (-3.2 vs. +2.0; p < .001; effect size = 0.85) and SKAMP and PERMP subscale scores. The three most common adverse events for dasotraline (vs. placebo) were insomnia (19.6% vs. 3.6%), headache (10.7% vs. 8.9%), and decreased appetite (10.7% vs. 3.6%). Conclusion: In this laboratory classroom study, dasotraline 4 mg was found to be an efficacious and generally well-tolerated treatment for ADHD in children aged 6 to 12 years.

Dasotraline in Children with Attention-Deficit/Hyperactivity Disorder: A Six-Week, Placebo-Controlled, Fixed-Dose Trial.

OBJECTIVE: Dasotraline is a potent inhibitor of presynaptic dopamine and norepinephrine reuptake with a pharmacokinetic profile characterized by slow absorption and a long elimination half-life. The aim of this study was to evaluate the efficacy and safety of dasotraline in children with attention-deficit/hyperactivity disorder (ADHD). METHODS: Children aged 6-12 years with a Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) diagnosis of ADHD were randomized to 6 weeks of double-blind once-daily treatment with dasotraline (2 or 4 mg) or placebo. The primary efficacy endpoint was change from baseline in the ADHD Rating Scale Version IV-Home Version (ADHD RS-IV HV) total score at week 6. RESULTS: A total of 342 patients were randomized to dasotraline or placebo (mean age 9.1 years, 66.7% male). Treatment with dasotraline was associated with significant improvement at study endpoint in the ADHD RS-IV HV total score for the 4 mg/day dose versus placebo (-17.5 vs. -11.4; p < 0.001; effect size [ES], 0.48), but not for the 2 mg/day dose (-11.8 vs. -11.4; ns; ES, 0.03). A regression analysis confirmed a significant linear dose-response relationship for dasotraline. Significant improvement for dasotraline 4 mg/day dose versus placebo was also observed across the majority of secondary efficacy endpoints, including the Clinical Global Impression (CGI)-Severity score, the Conners Parent Rating Scale-Revised scale (CPRS-R) ADHD index score, and subscale measures of hyperactivity and inattentiveness. Discontinuation rates due to adverse events (AEs) were higher in the dasotraline 4 mg/day group (12.2%) compared with the 2 mg/day group (6.3%) and placebo (1.7%). The most frequent AEs associated with dasotraline were insomnia, decreased appetite, decreased weight, and irritability. Psychosis-related symptoms were reported as AEs by 7/219 patients treated with dasotraline in this study. There were no serious AEs or clinically meaningful changes in blood pressure or heart rate on dasotraline. CONCLUSION: In this placebo-controlled study, treatment with dasotraline 4 mg/day significantly improved ADHD symptoms and behaviors, including attention and hyperactivity, in children aged 6-12 years. The most frequently reported AEs observed on dasotraline included insomnia, decreased appetite, decreased weight, and irritability.

Randomized, Double-Blind, Placebo-Controlled Studies to Assess Safety and Prophylactic Efficacy of Naphthoquine-Azithromycin Combination for Malaria Prophylaxis in Southeast Asia.

New prophylactic drugs against malaria infections are urgently needed. We conducted randomized, double-blind, placebo-controlled, phase 2 trials of a new antimalarial drug combination, naphthoquine-azithromycin (NQAZ), to determine its safety and protective efficacy in a low-endemicity area of Southeast Asia. In the first trial, 127 healthy volunteers were randomized to receive two single doses of either 400 mg of NQAZ (200 mg of each drug), 800 mg of NQAZ (400 mg of each drug), or placebo on day 0 and day 30. Weekly follow-ups were performed for 2 months, and physical and clinical laboratory exams were done during the second and eighth week. Both drug regimens were well tolerated, without any serious adverse events. Four adverse events (transient and slight elevations of serum transaminase concentrations) were found only in the two drug-treated groups and thus might be drug-related. In the second trial, 353 volunteer villagers were randomized into the same three groups as in the first trial, and malaria infections were followed for a month. For the intention-to-treat analysis, both regimens offered greater than 90% prophylactic efficacies against all malaria infections. When the analysis was done according to parasite species, 400 mg and 800 mg NQAZ provided 81.63 and 90.59% prophylactic efficacies, respectively, against Plasmodium falciparum infections, whereas both offered 100% prophylactic efficacy against Plasmodium vivax and Plasmodium ovale These trials showed that NQAZ had a good safety profile, and monthly single doses of 400 mg or 800 mg for adults offered excellent prophylaxis against malaria infections, especially the two relapsing species.

Combination strategy of PARP inhibitor with antioxidant prevent bioenergetic deficits and inflammatory changes in CCI-induced neuropathy.

Neuropathic pain, a debilitating pain condition and the underlying pathogenic mechanisms are complex and interwoven amongst each other and still there is scant information available regarding therapies which promise to treat the condition. Evidence indicate that oxidative/nitrosative stress induced poly (ADP-ribose) polymerase (PARP) overactivation initiate neuroinflammation and bioenergetic crisis culminating into neurodegenerative changes following nerve injury. Hence, we investigated the therapeutic effect of combining an antioxidant, quercetin and a PARP inhibitor, 4-amino 1, 8-naphthalimide (4-ANI) on the hallmark deficits induced by chronic constriction injury (CCI) of sciatic nerve in rats. Quercetin (25 mg/kg, p.o.) and 4-ANI (3 mg/kg, p.o.) were administered either alone or in combination for 14 days to examine sciatic functional index, allodynia and hyperalgesia using walking track analysis, Von Frey, acetone spray and hot plate tests respectively. Malondialdehyde, nitrite and glutathione levels were estimated to detect oxidative/nitrosative stress; mitochondrial membrane potential and cytochrome c oxidase activity to assess mitochondrial function; NAD & ATP levels to examine the bioenergetic status and levels of inflammatory markers were evaluated in ipsilateral sciatic nerve. Quercetin and 4-ANI alone improved the pain behaviour and biochemical alterations but the combination therapy demonstrated an appreciable reversal of CCI-induced changes. Nitrotyrosine and Poly ADP-Ribose (PAR) immunopositivity was decreased and nuclear factor erythroid 2-related factor (Nrf-2) levels were increased significantly in micro-sections of the sciatic nerve and dorsal root ganglion (DRG) of treatment group. These results suggest that simultaneous inhibition of oxidative stress-PARP activation cascade may potentially be useful strategies for management of trauma induced neuropathic pain.

Dasotraline for the Treatment of Attention-Deficit/Hyperactivity Disorder: A Randomized, Double-Blind, Placebo-Controlled, Proof-of-Concept Trial in Adults.

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by symptoms of inattention, hyperactivity, and impulsivity associated with clinically significant impairment in functioning. ADHD has an early onset, but frequently persists, with a prevalence estimate of 4% in adults. Dasotraline is a novel compound that is a potent inhibitor of dopamine and norepinephrine transporters that achieves stable plasma concentrations with once-daily dosing. In this study, adult outpatients meeting DSM-IV-TR criteria for ADHD were randomized to 4 weeks of double-blind, once-daily treatment with dasotraline 4 and 8 mg/day or placebo. The primary efficacy end point was change from baseline at week 4 in the ADHD Rating Scale, Version IV (ADHD RS-IV) total score. Secondary efficacy end points included the Clinical Global Impression, Severity (CGI-S) scale, modified for ADHD symptoms. Least squares (LS) mean improvements at week 4 in ADHD RS-IV total score were significantly greater for dasotraline 8 mg/day vs placebo (-13.9 vs -9.7; P=0.019), and nonsignificantly greater for 4 mg/day (-12.4; P=0.076). The LS mean improvements in modified CGI-S were significantly greater at week 4 for dasotraline 8 mg/day vs placebo (-1.1 vs -0.7; P=0.013), and for 4 mg/day vs placebo (-1.1 vs -0.7; P=0.021). The most frequent adverse events reported were insomnia, decreased appetite, nausea, and dry mouth. Discontinuations due to treatment-emergent adverse events were 10.3% and 27.8% of patients in 4 and 8 mg/day treatment groups, respectively. This study provides preliminary evidence that once-daily dosing with dasotraline, a long-acting, dual monoamine reuptake inhibitor, may be a safe and efficacious treatment for adult ADHD.

Antiarrhythmic Effect of Either Negative Modulation or Blockade of Small Conductance Ca2+-activated K+ Channels on Ventricular Fibrillation in Guinea Pig Langendorff-perfused Heart.

During recent years, small conductance Ca-activated K (SK) channels have been reported to play a role in cardiac electrophysiology. SK channels seem to be expressed in atria and ventricles, but from a functional perspective, atrial activity is predominant. A general notion seems to be that cardiac SK channels are predominantly coming into play during arrhythmogenic events where intracellular concentration of Ca is increased. During ventricular fibrillation (VF), a surge of [Ca]i has the potential to bind to and open SK channels. To obtain mechanistic insight into possible roles of SK channels during VF, we conducted experiments with an SK channel pore blocker (ICA) and a negatively allosteric modulator (NS8395) in a Langendorff-perfused heart model. Both compounds increased the action potential duration, effective refractory period, and Wenckebach cycle length to comparable extents. Despite these similarities, the SK channel modulator was found to revert and prevent VF more efficiently than the SK channel pore blocker. In conclusion, either negative allosteric modulation of the SK channel with NS8593 is more favorable than pure channel block with ICA or the 2 compounds have different selectivity profiles that makes NS8593 more antiarrhythmic than ICA in a setting of VF.

The duration of pacing-induced atrial fibrillation is reduced in vivo by inhibition of small conductance Ca(2+)-activated K(+) channels.

Atrial fibrillation (AF) is associated with increased morbidity and is in addition the most prevalent cardiac arrhythmia. Compounds used in pharmacological treatment has traditionally been divided into Na(+) channel inhibitors, ß-blockers, K(+) channel inhibitors, and Ca(2+) channel inhibitors, whereas newer multichannel blockers such as amiodarone and ranolazine have been introduced later. This study was devoted to the evaluation of an acute pacing-induced in vivo model of AF in rats. Antiarrhythmic effects of well-known compounds such as lidocaine, dofetilide, and ranolazine were confirmed in this model. In addition, antiarrhythmic effects of different inhibitors of Ca(2+)-activated small conductance K(+) (SK) channels were demonstrated. Intravenous application of 5 mg/kg of the negative SK channel modulator NS8593 reduced AF duration by 64.5%, and the lowest significantly effective dose was 1.5 mg/kg. A dose-effect relationship was established based on 6 different dose groups. Furthermore, it was demonstrated that the antiarrhythmic effect of NS8593 and other tested drugs was associated with an increase in atrial effective refractory period. The functional role of SK channels was confirmed by 2 other SK channel inhibitors, UCL1684 and apamin, thereby confirming the hypothesis that these channels might constitute a new promising target for antiarrhythmic treatment.

Concurrent targeting of nitrosative stress-PARP pathway corrects functional, behavioral and biochemical deficits in experimental diabetic neuropathy.

Peroxynitrite mediated nitrosative stress, an indisputable initiator of DNA damage and overactivation of poly(ADP-ribose) polymerase (PARP), a nuclear enzyme activated after sensing DNA damage, are two crucial pathogenetic mechanisms in diabetic neuropathy. The intent of the present study was to investigate the effect of combination of a peroxynitrite decomposition catalyst (PDC), FeTMPyP and a PARP inhibitor, 4-ANI against diabetic peripheral neuropathy. The end points of evaluation of the study included motor nerve conduction velocity (MNCV) and nerve blood flow (NBF) for evaluating nerve functions; thermal hyperalgesia and mechanical allodynia for assessing nociceptive alterations, malondialdehyde and peroxynitrite levels to detect oxidative stress-nitrosative stress; NAD concentration in sciatic nerve to assess overactivation of PARP. Additionally immunohistochemical studies for nitrotyrosine and Poly(ADP-ribose) (PAR) was also performed. Treatment with the combination of FeTMPyP and 4-ANI led to significant improvement in nerve functions and pain parameters and also attenuated the oxidative-nitrosative stress markers. Further, the combination also reduced the overactivation of PARP as evident from increased NAD levels and decreased PAR immunopositivity in sciatic nerve microsections. Thus, it can be concluded that treatment with the combination of a PDC and PARP inhibitor attenuates alteration in peripheral nerves in diabetic neuropathy (DN).

Protective effects of 4-amino1,8-napthalimide, a poly (ADP-ribose) polymerase inhibitor in experimental diabetic neuropathy.

Peripheral diabetic neuropathy is a heterogeneous group of disorders, and is known to affect 50-60% of diabetic patients. Poly (ADP-ribose) polymerase (PARP) activation has been identified as one of the key components in the pathogenesis of diabetic neuropathy. In the present study we have targeted PARP overactivation in diabetic neuropathy using a known PARP inhibitor, 4 amino 1, 8-napthalimide (4-ANI). Streptozotocin induced diabetic rats developed neuropathy within 6 weeks, which was evident from significant reduction in motor nerve conduction velocity (MNCV), nerve blood flow (NBF) along with neuropathic pain and abnormal sensory perception. Six weeks after diabetes induction Sprague Dawley rats were treated with 4-ANI (3 and 10 mg/kg, p.o.) for a period of two weeks (seventh and eighth weeks). Two week treatment with 4-ANI showed improvement in nerve conduction, nerve blood flow and reduction in tail flick responses and mechanical allodynia in diabetic animals. 4-ANI also attenuated PAR immunoreactivity and NAD depletion in nerves of diabetic animals. Results of present study suggest the potential of PARP inhibitors like 4-ANI in the treatment of diabetic neuropathy.

Sutureless avascular meniscal repair with a photoactive naphthalimide compound: a preliminary animal study.

PURPOSE: The purpose of this study was to evaluate the ability of 2 new photoactive naphthalimide compounds to repair a lesion in the avascular zone of the meniscus. TYPE OF STUDY: In vivo animal study. METHODS: Ten Barbados sheep were used as the animal model. Under anesthesia, the left knee joint was opened and 2 identical lesions were produced in the avascular zone of the medial meniscus. The posterior horn lesion was left alone and used as the control and the lesion in the anterior horn was repaired using the photoactive laser technique. The photoactive laser technique involved placing small amounts of a naphthalimide compound into the lesion and then irradiating the site with a laser (457 nm and 1.8 W/cm2) for 6 minutes. Two different versions of the naphthalimide compound were produced and divided between the 10 animals. The joint was then flushed with normal saline and closed in layers with resorbable sutures. Four animals were euthanized at the end of 1 month and 6 animals were euthanized at the end of 3 months. After death, the medial meniscus was exposed, dissected free, and then placed in 10% buffered formalin for histologic preparation and staining. RESULTS: At 1 month, the control lesions grossly showed no repair and the photochemically repaired lesions appeared to be bonded. The photochemically repaired lesions showed some bridging by an eosinophilic amorphous-appearing substance. The previous cleft within the fibrocartilaginous structure had disappeared, and early formation of connective tissue fibers was identified. However, some reduction in cellularity was seen in these tissue sections. At 3 months, again the control lesions did not show any repair response, while the photochemically repaired lesions showed results similar to the animals at 1 month, but with a less consistent pattern of tissue bonding and remodeling. The reduced tissue cellularity was still noted. There was no discernible difference between the naphthalimide compounds. CONCLUSIONS: These preliminary results demonstrate the potential usefulness of this photochemical bonding for the treatment of avascular meniscal lesions. Additional research will be necessary to fully understand the mechanism of this repair and optimize its use before any human trials. CLINICAL RELEVANCE: This is a preliminary animal study investigating the short-term in vivo effects of a novel photochemical compound for the repair of meniscal lesions. This repair may someday be valuable in the repair of avascular meniscal lesions.

Neuroprotective effect of 4-amino-1,8-napthalimide, a poly(ADP ribose) polymerase inhibitor in middle cerebral artery occlusion-induced focal cerebral ischemia in rat.

In the present study, neuroprotective effect of 4-amino-1,8-napthalimide (4-ANI), a poly(ADP-ribose) polymerase (PARP) inhibitor was investigated in middle cerebral artery occlusion (MCAo)-induced focal ischemia. Sprague-Dawley rats were subjected to 2 h of middle cerebral artery occlusion followed by 22 h of reperfusion. After 22 h of reperfusion rats were evaluated for cerebral infarction, neurological deficits, brain NAD levels, and in situ terminal deoxynucleotidyl transferase mediated dUTP-biotin nick end labeling (TUNEL). Focal ischemia produced significant infarct volume (201 +/- 14 mm3), neurological scores (2 +/- 0.5) and 28 +/- 4.5% brain NAD depletion. Ischemia was associated with increased in TUNEL positive cells in brain sections indicating DNA fragmentation. 4-ANI treatment (1 and 3 mg/kg, i.p.) significantly decreased infarct volume to 35 +/- 7% and 70 +/- 6%, respectively. Neurological functions were also significantly improved at these doses. 4-ANI (3 mg/kg) completely reversed brain NAD depletion and significantly reduced the increase in the number of TUNEL positive cells. Nevertheless, 4-ANI treatment did not alter cerebral blood flow and blood pressure. Our study suggests 4-ANI is a potent neuroprotective agent in focal cerebral ischemia and its neuroprotective effects may be attributed to reduction of NAD depletion and DNA fragmentation.

The effect of poly (adenosine diphosphate-ribose) polymerase inhibitors on biochemical changes in testicular ischemia-reperfusion injury.

PURPOSE: Poly (adenosine diphosphate [ADP]-ribose) polymerase inhibitors have been used successfully to decrease ischemia-reperfusion injury in several organ systems. We evaluated the efficacy of poly (ADP-ribose) polymerase inhibitors on biochemical changes in testicular ischemia-reperfusion injury. MATERIALS AND METHODS: Adult male Wistar rats were divided into 9 groups of 6 each. One group served to determine baseline values of biochemical parameters, 1 that underwent sham operation served as a control, 1 underwent 2 hours of testicular torsion and 4 hours of detorsion, 2 received pretreatment with vehicle (saline or dimethyl sulfoxide) before detorsion and 4 received pretreatment with the poly (ADP-ribose) polymerase inhibitor nicotinamide, 3-aminobenzamide, 1,5-dihydroxyisoquinoline or 4-amino-1,8-naphthalimide before detorsion. Lipid peroxidation products, nitric oxide content and myeloperoxidase activity, an indicator of neutrophil accumulation, were assessed in testicular and renal tissues. RESULTS: Testicular torsion-detorsion caused a significant increase in lipid peroxidation products, nitric oxide content and myeloperoxidase activity in ipsilateral testes (p <0.01) but not in the contralateral testes or kidneys. Animals treated with poly (ADP-ribose) polymerase inhibitors had a significant decrease in these biochemical parameters compared with vehicle treated animals (p <0.01). CONCLUSIONS: These data emphasize that poly (ADP-ribose) polymerase may have a role in testicular damage caused by ischemia-reperfusion and the inhibition of poly (ADP-ribose) polymerase may be a novel approach to therapy for ischemia-reperfusion injury of the testis.

[A case of migrainous infarction accompanying idiopathic thrombocytopenic purpura].

We reported a 31 year-old man with repeated episodes of migraine at a frequency of about once a week on and after January, 2000. In January 2001, scintillating scotoma and pulsating headache appeared followed by left hemianopsia. His platelet count decreased to 80,000/microliter and high intensity areas were observed in the right occipital lobe and hippocampal gyrus on the FLAIR image of brain MRI. Subsequently performed brain MRA and vertebral angiography revealed segmental stenosis and obstruction in the right posterior cerebral artery. Under the diagnosis of migrainous infarction, sodium ozagrel and lomerizine hydrochloride were administered. Idiopathic thrombocytopenic purpura was additionally diagnosed based on the decreased platelet count which was then treated with predonisolone. After these treatment, his migraine attack disappeared. In this patient, platelet destruction due to idiopathic thrombocytopinic purpura and subsequent release of serotonin seemed to have involved in the occurrence of migrainous infarction.

Dysphoric disorders in women: a case of perinatal depression.

During her third pregnancy, a woman becomes preoccupied with illness and death. When the dysphoria continues after her child is born, how would you evaluate and manage the problem?

Sertraline in the treatment of panic disorder: a double-blind multicenter trial.

OBJECTIVE: This study determined the efficacy and safety of sertraline in the treatment of patients with panic disorder. METHOD: The study was a randomized, double-blind, parallel-group, flexible-dose comparison of sertraline and placebo in outpatients with a DSM-III-R diagnosis of panic disorder with or without agoraphobia. After a 2-week single-blind placebo lead-in, 168 patients entered a 10-week double-blind phase in which they were randomly assigned to treatment with either sertraline or placebo. RESULTS: Sertraline was significantly more effective than placebo in decreasing the number of full and limited-symptom panic attacks. Among patients who completed the study, the mean number of panic attacks per week dropped by 88% in the sertraline-treated patients and 53% in the placebo-treated patients. Sertraline-treated patients also had significantly more improvement than placebo-treated patients in scores on the Quality of Life Enjoyment and Satisfaction Questionnaire, patient global evaluation, and Clinical Global Impression severity of illness and global improvement scales. Overall, patients tolerated sertraline well, and only 9% terminated treatment because of side effects. CONCLUSIONS: Sertraline is an effective and well-tolerated treatment for patients with panic disorder.