A randomized controlled trial examining the effects of intranasal oxytocin on alcohol craving and intimate partner aggression among couples.

BACKGROUND: While alcohol use disorder (AUD) is a well-established risk factor for intimate partner aggression (IPA), effective treatments for co-occurring AUD and IPA (AUD/IPA) are lacking. Oxytocin is one promising pharmacological candidate for AUD/IPA given its potential to modulate social behavior and attenuate alcohol use. However, emerging data suggests that oxytocin's prosocial effects are inconsistent, and a small number of studies have also found that oxytocin might have the potential to be aggressogenic. No studies have directly examined the impact of oxytocin on alcohol- or IPA-related outcomes in a dyadic context. METHODS: The goal of this double-blind, randomized, and placebo-controlled trial was to examine the effects of a single dose of intranasal oxytocin (40 international units) on cue-induced alcohol craving, subjective aggression, laboratory task-based IPA, and cortisol reactivity in a sample of 100 couples (N = 200 individuals) with AUD and physical IPA in their current relationship. RESULTS: There were no statistically significant differences between the oxytocin and placebo conditions for any of the primary outcomes. CONCLUSIONS: Findings suggest that a single dose of intranasal oxytocin was not efficacious in mitigating alcohol craving or aggression in this sample. Although hypotheses were not supported, the findings provide important evidence that oxytocin was not aggressogenic in this high-risk sample. Future research investigating dispositional and contextual moderators of oxytocin response in addition to the therapeutic effects of more intensive oxytocin dosing or administration strategies on alcohol craving and aggression is warranted.

Pure tension-type headache versus tension-type headache in the migraineur.

Primary headache disorders include tension-type headache and migraine. These headache types can be differentiated based on strict clinical definitions that depend on the patient's signs and symptoms. However, some of the clinical features can overlap, and in addition, the same comorbid conditions can occur in both headache types. Distinction between these headache types on occasion can be difficult due to comorbid conditions such as temporomandibular joint disorders and myofascial pain with forward head posturing, which may be present in both headache disorders, and thus result in similar features in both conditions. Furthermore, chronification, particularly of migraine, leads to a decrease in the associated symptoms of migraine, such as nausea, photophobia, and phonophobia, so that these headaches more closely resemble tension-type headache. Finally, in some patients, both tension-type headache and migraine may occur at different times.

Substrate specificity of the Norwalk virus 3C-like proteinase.

The Norwalk Virus (NV) is the prototype strain of human caliciviruses that cause epidemic outbreaks of foodborne and waterborne gastroenteritis. These viruses do not grow in cell culture and the mechanisms of virus replication are obscure. The NV genome is a 7.7 kb ssRNA molecule that encodes three open reading frames (ORFs). The first ORF is a 1789 amino acid polyprotein that is processed into nonstructural proteins by a viral protease similar to the picornavirus 3C protease. Primary cleavage sites in the ORF1 polyprotein of two Norwalk-like viruses have been identified as QG dipeptides. We studied primary cleavage sites in the NV polyprotein and residues surrounding the scissile bond that are important in substrate recognition. A series of mutations were made at amino acids occupying positions implicated as important in cleavage site recognition for chymotrypsin-like viral proteases. We determined that effective processing at amino acid 398 to release the N-terminal p48 protein is necessary for proteolytic release of the p41 protein, that the P4 position N-terminal to the scissile bond is important for efficient processing, and that substitution of large hydrophobic residues were tolerated at this position. Finally, we defined the acidic residue of the 3CL(pro) catalytic site.