Grooming Behavior Research Articles

Sprayable NAHAO® hydrogel alleviates pain and accelerates rat oral mucositis wound healing

ObjectiveTo investigate the promote healing and analgesic effects of NAHAO® Brand Nazhen oral antibacterial care solution (NAHAO® spray) on the 5-fluorouracil-induced oral mucositis in rats. Material and methodSixty male SD rats were randomly divided into normal group, model group, recombinant human epidermal growth factor (rhEGF) group, NAHAO® spray group, and 1/3 concentration of NAHAO® spray group. 5-FU was injected intraperitoneally on the first and third days of the experimental model, and OM was induced using mechanical trauma on the third and fifth days. Wound healing quality was assessed by the appearance of mucosa and histological images on day6 and day10. Pain is measured by facial grooming behavior stimulated by capsaicin, the alternation of body weight and food intake was also recorded to reflect the OM pain. To examine the involvement of the cyclooxygenase pathway in the mechanism underlying oral mucositis, we detected the expression of cyclooxygenase2(COX-2) and matrix metalloproteinase 9(MMP9) via immunohistochemical staining and determined the PGE2 concentrations in rats’ serum during healing of oral mucositis. ResultsNAHAO® spray attenuated pathological damage and reduced pain sensitivity effectively. COX-2 expression levels were inhibited in the NAHAO® spray-treated group. The concentration of PGE2 and the expression of MMP9 were inhibited in NAHAO®-treated rats. Compared with normal rats, the elevated rubbing time following capsaicin stimulation in the model was completely inhibited after being treated with NAHAO® spray. ConclusionNAHAO® spray alleviated OM-induced pain and promoted wound healing partly by inhibiting the cyclooxygenase-related pathway.

Involvement of Lateral Habenula Dysfunction in Repetitive Mild Traumatic Brain Injury-Induced Motivational Deficits.

Affective disorders including depression (characterized by reduced motivation, social withdrawal, and anhedonia), anxiety, and irritability are frequently reported as long-term consequences of mild traumatic brain injury (mTBI) in addition to cognitive deficits, suggesting a possible dysregulation within mood/motivational neural circuits. One of the important brain regions that control motivation and mood is the lateral habenula (LHb), whose hyperactivity is associated with depression. Here, we used a repetitive closed-head injury mTBI model that is associated with social deficits in adult male mice and explored the possible long-term alterations in LHb activity and motivated behavior 10-18 days post-injury. We found that mTBI increased the proportion of spontaneous tonically active LHb neurons yet decreased the proportion of LHb neurons displaying bursting activity. Additionally, mTBI diminished spontaneous glutamatergic and GABAergic synaptic activity onto LHb neurons, while synaptic excitation and inhibition (E/I) balance was shifted toward excitation through a greater suppression of GABAergic transmission. Behaviorally, mTBI increased the latency in grooming behavior in the sucrose splash test suggesting reduced self-care motivated behavior following mTBI. To show whether limiting LHb hyperactivity could restore motivational deficits in grooming behavior, we then tested the effects of Gi (hM4Di)-DREADD-mediated inhibition of LHb activity in the sucrose splash test. We found that chemogenetic inhibition of LHb glutamatergic neurons was sufficient to reverse mTBI-induced delays in grooming behavior. Overall, our study provides the first evidence for persistent LHb neuronal dysfunction due to an altered synaptic integration as causal neural correlates of dysregulated motivational states by mTBI.

Beauty Premium of Working Women in Urban Indonesia

Being attractive is believed to give many benefits in life. Economic studies have observed that physical attractiveness is associated with a higher wage. The benefits of being attractive have been perceived from early age, to the labor market, and to the marriage market. Despite all the advantages that beauty brings, efforts are being made to achieve or maintain attractiveness. People spend substantial resources, such as time and money, to enhance appearance. Using Ordinary Least Square (OLS) regression, this study examines the correlation between perceived attractiveness and earnings among urban working women in Indonesia. Findings show that the income of women who perceive themselves as attractive is 19% higher than those who are unattractive after makeup application. Meanwhile, attractiveness without makeup application is found uncorrelated with earnings. Thus, grooming behavior may be a source of the observed wage premium for female workers.

Galium aparine L. protects against acetaminophen-induced hepatotoxicity in rats

The toxicity of acetaminophen (N-acetyl-para-aminophenol (APAP)) is the most frequent cause of drug-induced liver damage. Galium aparine L. (GA) is traditionally used to treat jaundice. We aimed to investigate the hepatoprotective potential of GA in the APAP-induced hepatic encephalopathy (HE) rat model. Qualitative phytochemical characterization of GA was performed by LC/Q-TOF/MS analysis. Wistar rats were pretreated with GA (250 and 500 mg/kg b.wt. per oral) for five days. On the 6th day, the rats were exposed to APAP (1500 mg/kg b.wt. oral gavage) and behavioral tests (open field and passive avoidance tests) were applied on the 7th and 8th days. The animals were killed, and biochemical and histopathological parameters were assessed in blood and hepatic specimens. GA pretreated rats exhibited a significant reduction in APAP-induced liver damage, evidenced by the reduction in liver necrosis and alanine aminotransferase (ALT), aspartate aminotransferase (AST), and bilirubin (BIL). GA demonstrated an anxiolytic effect, as seen in the acquisition trial and grooming behavior. The short-term memory performances of animals were not changed in all groups, suggesting that APAP intoxication did not affect hippocampal function. These results show that GA extract markedly exerts hepatoprotective activity, while its effect on hepatic encephalopathy was limited.

Effect of the analgesics dipyrone, tramadol, and meloxicam on the behavior of laboratory rats

Awareness about the ethical use of laboratory animals has increased over recent decades alongside the development of strict guidelines and legislation concerning the welfare of animals in scientific research. Although minimization of animal suffering during experimentation is of paramount importance, it is sometimes neglected because of the presumed interference of analgesics on behavioral patterns. For this reason, comprehensive research with multiple pharmacological agents is vital if analgesics are to be included in experimental procedures. In this context, we aimed to evaluate the effects of the analgesics dipyrone (DIP), tramadol (TRA), meloxicam (MEL), and combinations thereof on the behavioral parameters of naïve laboratory rats. Forty-eight SPF male Wistar-Han rats were divided randomly into 6 equal groups (n = 8 per group) and treated by intraperitoneal injection with DI (178 mg/kg), TRA (17.8 mg/kg), MEL (1.5 mg/kg), DIP+TRA (178 + 17.8 mg/kg), MEL+TRA (1.5 + 17.8 mg/kg) or saline (SAL; control). The behavior of the treated animals was assessed 30 minutes after injection of analgesic by sequential submission to Open Field, Elevated Plus Maze, and Grooming Transfer tests. Treatment with DIP+TRA provoked the most significant alterations in rat behavior by reducing locomotion, rearing, and grooming. Although treatment with DI alone diminished exploratory behavior, the effect on grooming was not remarkable, thereby suggesting that DI has a suppressive motor effect, possibly caused by its action on the endocannabinoid system, which is potentiated by TRA. In the Open Field tests, the grooming behavior of all TRA-treated animals was reduced while treatment with MEL increased locomotion. Given that analgesia is an ethical duty, the experimental design should always consider the behavioral effects of the drugs themselves.

MeHg exposure impairs both the catecholaminergic and cholinergic systems resulting in motor and non-motor behavioral changes in Drosophila melanogaster

Human exposure to the natural environmental contaminant methylmercury (MeHg) has been associated to adverse health effects. Importantly, the mechanisms by which this organomercurial exerts its neurotoxicity have yet to be fully clarified. Therefore, the aim of this study was to evaluate whether exposure to MeHg alters dopamine (DA) and octopamine (OA) levels, acetylcholinesterase (AChE) activity and impacts both motor and non-motor behaviours. We studied the effect of MeHg by feeding 1–2 d old flies (male and females) with 25 and 50 μM MeHg for 4 d and determined effects on survival, motor and non-motor behaviours, oxidative stress, AChE and tyrosine hydroxylase (TH) activities, as well as DA and OA levels. We found that Drosophila melanogaster (D. melanogaster) exposed to MeHg showed a reduction in survival rate, associated with the inhibition of AChE and TH activities in head of flies and decreased DA and OA levels. These changes were accompanied by behavioural alterations, such as locomotor deficit and increased grooming behaviour, in addition to an increase in oxidative stress markers both in head and in body of flies, and an increase in glutathione-S-transferase (GST) activity in head of flies. Collectively, our data support the hypothesis that MeHg neurotoxicity is associated with altered OA and DA levels, AChE inhibition, which may serve, at least in part, as the underpinnings of both motor and non-motor behavioural changes.

Retrospective Perceptions of Grooming in Same-Sex versus Opposite-Sex Child Sexual Abuse

ABSTRACT Research on child sexual abuse (CSA) has predominantly focused on opposite-sex (e.g., male adult-female child) adult-child pairs, neglecting same-sex (e.g., male adult-male child) adult-child pairs. Grooming behaviors are an early indicator of CSA and while it is important to recognize grooming to prevent abuse, research has shown that detecting these behaviors is a difficult task. Despite this difficulty, people retrospectively overestimate their ability to recognize abuse once it is clear that abuse has occurred. The current study investigated how outcome information (abuse did or did not occur) and the sex of the adult-child pair influenced perceptions of adult-child interactions. Participants evaluated vignettes depicting grooming and non-grooming behaviors in same-sex and opposite-sex adult-child conditions. Participants who were told CSA occurred provided higher likelihood ratings that abuse occurred than participants who were not given information about the abuse. There was some evidence that gender pairings influenced retrospective perceptions of these interactions.

The effects of mango leaf extract during adolescence and adulthood in a rat model of schizophrenia.

There is evidence that in schizophrenia, imbalances in inflammatory and oxidative processes occur during pregnancy and in the early postnatal period, generating interest in the potential therapeutic efficacy of anti-inflammatory and antioxidant compounds. Mangiferin is a polyphenolic compound abundant in the leaves of Mangifera indica L. that has robust antioxidant and anti-inflammatory properties, making it a potential candidate for preventive or co-adjuvant therapy in schizophrenia. Hence, this study set-out to evaluate the effect of mango leaf extract (MLE) in a model of schizophrenia based on maternal immune activation, in which Poly I:C (4 mg/kg) is administered intravenously to pregnant rats. Young adult (postnatal day 60–70) or adolescent (postnatal day 35–49) male offspring received MLE (50 mg/kg of mangiferin) daily, and the effects of MLE in adolescence were compared to those of risperidone, assessing behavior, brain magnetic resonance imaging (MRI), and oxidative/inflammatory and antioxidant mediators in the adult offspring. MLE treatment in adulthood reversed the deficit in prepulse inhibition (PPI) but it failed to attenuate the sensitivity to amphetamine and the deficit in novel object recognition (NOR) induced. By contrast, adolescent MLE treatment prevented the sensorimotor gating deficit in the PPI test, producing an effect similar to that of risperidone. This MLE treatment also produced a reduction in grooming behavior, but it had no effect on anxiety or novel object recognition memory. MRI studies revealed that adolescent MLE administration partially counteracted the cortical shrinkage, and cerebellum and ventricle enlargement. In addition, MLE administration in adolescence reduced iNOS mediated inflammatory activation and it promoted the expression of biomarkers of compensatory antioxidant activity in the prefrontal cortex and hippocampus, as witnessed through the reduction of Keap1 and the accumulation of NRF2 and HO1. Together, these findings suggest that MLE might be an alternative therapeutic or preventive add-on strategy to improve the clinical expression of schizophrenia in adulthood, while also modifying the time course of this disease at earlier stages in populations at high-risk.

Effects of Bromelain on Noradrenaline Release During Anxiety-Like Behaviour Following Intra-Medial Forebrain Bundle 6-OHDA Injection in Rat Model of Parkinsonism

Introduction: Parkinson’s disease (PD) is characterized by emotional dysfunction which is a typical manifestation of non-motor symptoms. Non-motor symptoms may occur simultaneously with motor impairment in PD. Anxiety is a comorbidity in PD. This study therefore addresses the question of whether prior/post 6-OHDA lesion treatment with bromelain can show an effect on the behavioural signs of parkinsonism and damage to the CNS noradrenergic system in experimental rats. Methods: Open field and despair swim tests were used to assess certain psychomotor functions and emotional reactivity in the neurotoxin injected rats. The level of noradrenaline in certain regions of the brain as well as in the blood was further analyzed by enzyme linked immunosorbent assay. Findings: The results showed that unilateral injection of the neurotoxin into the rats’ medial forebrain bundle caused a decrease in the rearing time and a corresponding increase in the time spent grooming. There was a further indication that 6-OHDA injection resulted in the reduction of noradrenaline in the systemic environment. Also, the duration of immobility was increased by 6-OHDA injection but not statistically significant. Pretreatment with bromelain caused a change in the grooming behaviour not consistent with noradrenaline level. Conclusion: This finding suggests that bromelain treatment interferes with the regulation of mood and emotion during the early phase of parkinsonism in the 6-OHDA rat model of PD which was accompanied by changes in noradrenaline level.

Fentanyl induces autism-like behaviours in mice by hypermethylation of the glutamate receptor gene Grin2b

BackgroundEnvironmental factors contribute to autism spectrum disorder. Fentanyl, one of the most widely used opioid analgesics in anaesthesia, can induce neurotoxicity, but its role in autism remains unknown. We determined whether fentanyl induced autism-like behaviours in young mice and the underlying mechanisms. MethodsYoung male and female mice received fentanyl at postnatal days 6, 8, and 10, and performed behavioural tests, including three-chamber social preference, elevated plus maze, grooming behaviour, and open-field test, from postnatal days 30–32. Expression of Grin2b, the gene encoding the GluN2B subunit of the N-methyl-d-aspartate receptor, was assessed in the anterior cingulate cortex of male mice using fluorescence in situ hybridisation histochemistry. We used bisulfite target sequencing to determine Grin2b hypermethylation sites after fentanyl treatment. In the specific activation and rescue experiments, we injected the mu opioid receptor agonist [D-Ala,2 N-MePhe,4 Gly-ol]-enkephalin (DAMGO) or Grin2b overexpression lentivirus into the anterior cingulate cortex of male mice. ResultsFentanyl induced autism-like behaviours in both young male and female mice, and downregulated Grin2b expression (0.49-fold [0.08] vs 1.00-fold [0.09]; P<0.01) and GluN2B protein amounts (0.38-fold [0.07] vs 1.00-fold [0.12]; P<0.01) in the anterior cingulate cortex through hypermethylation of Grin2b. The mu-opioid receptor antagonist naloxone and overexpression of Grin2b in anterior cingulate cortex attenuated the fentanyl-induced effects, whereas DAMGO injection into the anterior cingulate cortex induced autism-like behaviours. ConclusionsThese data suggest that fentanyl induces autism-like behaviours in young mice via an epigenetic mechanism. Further research is required to determine possible clinical relevance to autism risk.

Motor-like Tics are Mediated by CB2 Cannabinoid Receptor-dependent and Independent Mechanisms Associated with Age and Sex

Δ9-Tetrahydrocannabinol (Δ9-THC) inhibits tics in individuals with Tourette syndrome (TS). Δ9-THC has similar affinities for CB1/CB2 cannabinoid receptors. However, the effect of HU-308, a selective CB2 receptor agonist, on repetitive behaviors has not been investigated. The effects of 2,5-dimethoxy-4-iodoamphetamine (DOI)-induced motor-like tics and Δ9-THC were studied with gene analysis. The effects of HU-308 on head twitch response (HTR), ear scratch response (ESR), and grooming behavior were compared between wildtype and CB2 receptor knockout (CB2−/−) mice, and in the presence/absence of DOI or SR141716A, a CB1 receptor antagonist/inverse agonist. The frequency of DOI-induced repetitive behaviors was higher in CB2−/− than in wildtype mice. HU-308 increased DOI-induced ESR and grooming behavior in adult CB2−/− mice. In juveniles, HU-308 inhibited HTR and ESR in the presence of DOI and SR141716A. HU-308 and beta-caryophyllene significantly increased HTR. In the left prefrontal cortex, DOI increased transcript expression of the CB2 receptor and GPR55, but reduced fatty acid amide hydrolase (FAAH) and α/β-hydrolase domain-containing 6 (ABHD6) expression levels. CB2 receptors are required to reduce 5-HT2A/2C-induced tics in adults. HU-308 has an off-target effect which increases 5-HT2A/2C-induced motor-like tics in adult female mice. The increased HTR in juveniles induced by selective CB2 receptor agonists suggests that stimulation of the CB2 receptor may generate motor tics in children. Sex differences suggest that the CB2 receptor may contribute to the prevalence of TS in boys. The 5-HT2A/2C-induced reduction in endocannabinoid catabolic enzyme expression level may explain the increased endocannabinoids’ levels in patients with TS.

Emotional Problems, Dark Personality, Sexting and Grooming in Adolescents: the role of Gender and Age

The present study aimed to study if emotional problems (depression and anxiety) and Dark Personality were predictors of sexting and grooming, and if this behavior differs by gender and age. A sample of 728 adolescents between 11 and 18 years of age (38% male) from three private high schools located in Buenos Aires and Paraná, Argentina, was drawn. They completed a Sexting questionnaire, the Questionnaire for Online Sexual Solicitation and Interaction of Minors with Adults for grooming behavior, Rosenberg Scale of Psychosomatic Symptoms, the Kovacs Depression Inventory for Children and the Dirty Dozen for dark personality traits. Results showed that 12% of adolescents admitted having carried out a sexting behavior. Sending written messages of a sexual nature (11%) and photos (10%) were the most prevalent ways, followed by videos (4%), but no differences were detected according to gender. Significant predictors of sexting and the size of its explained variance ranged by gender (R² = 47% for females and R² = 12% for men, respectively). In the case of females, older age and psychopathy were the significant predictors. In the case of males, less anxiety was the significant predictors. A structural model explained a variance of 6% for sexting and 21% for grooming, indicating that there was no inavariance, according to gender. Linear regressions to predict grooming from sexting also suggested this relationship was moderated by gender.

The Nature and Scope of Educator Misconduct in K-12.

Educator sexual misconduct is a serious problem in the United States (U.S.), with a 2004 Department of Education report estimating that 9.6% of K-12 students in the U.S. had experienced either verbal, visual, or physical educator misconduct at some point during their school career. However, since that report almost 20years ago, there have been few large-scale studies examining the extent of the problem. As such, the current study, which uses a large sample from recent high school graduates in four U.S. states, offers updated data on the nature and scope of sexual misconduct in educational settings. Overall, 11.7% of the 6632 participants reported having experienced at least one form of educator sexual misconduct during Grades K-12, with 11% reporting sexual comments and less than 1% reporting other forms of sexual misconduct (e.g., receiving sexual photos/messages, being kissed, touched sexually, or engaging in sexual intercourse/oral sex). Those who reported misconduct showed significantly more difficulties in current psychosocial functioning than those who did not report educator misconduct. Academic teachers most often perpetrated the abuse (63%), followed by coaches and gym teachers (20%). Educators who engaged in sexual misconduct were primarily male (85%), whereas students who reported experiencing educator misconduct were primarily female (72%). Rates of disclosure to authorities were very low (4%) and some sexual grooming behaviors like gift giving (12%) and showing special attention (29%) were reported. These findings will be discussed as they pertain to the prevention of sexual misconduct within educational settings.

Toward Translational Therapeutics for Quieting the Obsessive Mind

Standard first-line treatments for OCD may not provide sufficient relief of OCD symptoms for all those seeking care; thus, there is an urgent need for alternative treatments. This plenary will review mechanistic and clinical research studies highlighting potential treatment advances in OCD including ketamine, experimental medications, and neuromodulation. Additionally, the plenary will highlight basic research studies demonstrating that ketamine increases activity in a fronto-striatal circuit that causally controls compulsive grooming behavior, suggesting this circuit may be important for

Parasitoid wasp venom manipulates host innate behavior via subtype-specific dopamine receptor activation.

ABSTRACTThe subjugation strategy employed by the jewel wasp is unique in that it manipulates the behavior of its host, the American cockroach, rather than inducing outright paralysis. Upon envenomation directly into the central complex (CX), a command center in the brain for motor behavior, the stung cockroach initially engages in intense grooming behavior, then falls into a lethargic sleep-like state referred to as hypokinesia. Behavioral changes evoked by the sting are due at least in part to the presence of the neurotransmitter dopamine in the venom. In insects, dopamine receptors are classified as two families, the D1-like and the D2-like receptors. However, specific roles played by dopamine receptor subtypes in venom-induced behavioral manipulation by the jewel wasp remain largely unknown. In the present study, we used a pharmacological approach to investigate roles of D1-like and D2-like receptors in behaviors exhibited by stung cockroaches, focusing on grooming. Specifically, we assessed behavioral outcomes of focal CX injections of dopamine receptor agonists and antagonists. Both specific and non-specific compounds were used. Our results strongly implicate D1-like dopamine receptors in venom-induced grooming. Regarding induction of hypokinesia, our findings demonstrate that dopamine signaling is necessary for induction of long-lasting hypokinesia caused by brain envenomation.

Environmental enrichment changes rabbits' behavior, serum hormone level and further affects cecal microbiota.

Many studies have shown that stress is associated with gut microbiota. Environmental enrichment (EE) could reduce stress in farm animals; however, limited information is available on the microbial community composition in rabbits raised with or without EE. This study aimed to identify EE influences on the behavior, serum hormonal levels, and cecal microbiota of rabbits. Two hundred Rex rabbits were segregated randomly within four cohorts (n = 50); reared for 76 d within standardized enclosures (non-enriched) or within cages containing a willow-stick (WS), rubber-duck (RD), or a can of beans (CB). The rabbits’ ingestive, rest, locomotion, exploratory, grooming, and abnormal behavior were observed. The serum hormone levels for rabbits were measured, and cecal specimens were sequencedfrom the V3–V4 region using 16S rRNA amplicons. Environmental enrichment increased feeding and drinking time, promoted exploratory behavior, and reduced abnormal behavior in rabbits. Insulin-like growth factor 1(IGF-1) levels of the enriched cohorts were elevated in comparison to the control cohort. Serum cortisol level for CB cohort was markedly reduced in comparison to the control cohort (p < 0.05), while dopamine levels for CB cohort peaked. Further, we found that EE mainly affected the dominant microbiota. Several families, such as Erysipelotrichaceae, Tannerellaceae, Enterobacteriaceae, Burkholderiaceae, and Prevotellaceae were markedly reduced within the CB cohort. Bacteria such as Alloprevotella, Bifidobacterium, Enterobacteriaceae, Parabacteroides, and Erysipelatoclostridium were identified as having negative associations with the presence of serum cortisol. EE influenced rabbit behavior and serum hormonal levels, and CB enrichment was the most suitable for rabbits. Further, cecal microbiota composition and diversity were affected by CB enrichment. These findings suggested that CB could be considered for use in rabbit husbandry.

A neural progenitor mitotic wave is required for asynchronous axon outgrowth and morphology.

Spatiotemporal mechanisms generating neural diversity are fundamental for understanding neural processes. Here, we investigated how neural diversity arises from neurons coming from identical progenitors. In the dorsal thorax of Drosophila, rows of mechanosensory organs originate from the division of sensory organ progenitor (SOPs). We show that in each row of the notum, an anteromedial located central SOP divides first, then neighbouring SOPs divide, and so on. This centrifugal wave of mitoses depends on cell-cell inhibitory interactions mediated by SOP cytoplasmic protrusions and Scabrous, a secreted protein interacting with the Delta/Notch complex. Furthermore, when this mitotic wave was reduced, axonal growth was more synchronous, axonal terminals had a complex branching pattern and fly behaviour was impaired. We show that the temporal order of progenitor divisions influences the birth order of sensory neurons, axon branching and impact on grooming behaviour. These data support the idea that developmental timing controls axon wiring neural diversity.

Evading Detection: What Do We Know about Men Charged with Extrafamilial Child Sexual Abuse following Delayed Detection?

ABSTRACT Most child sexual abuse (CSA) remains unreported and undetected. Despite this, much of what we know about perpetrators of CSA is derived from samples of convicted CSA offenders. Significant knowledge gaps remain about those who have evaded detection. This study addresses this gap with an in-depth content analysis of the case files of ten convicted child sexual offenders (CSOs) with the longest detection lag, selected from a broader group (n = 349) of men incarcerated at the Massachusetts Treatment Center (MTC). Participants were examined on a range of offender characteristics including Adverse Childhood Experiences (ACEs), cognitive distortions, antisocial traits, indicators of pedophilia and Machiavellian or narcissistic traits, offense facilitating factors, and grooming behavior. A tentative profile emerged with the following characteristics: direct experience of childhood abuse, various cognitive distortions, specialized rather than versatile criminal history, pedophilic traits, Machiavellian traits, and engaging in a range of offense-facilitating behaviors including grooming. We provide insight into offenders who evade detection for CSA and set the foundation for further research to inform prevention strategies for law enforcement agencies and child-serving organizations.

Quantitation of neuroxin-1, ataxin-3 and atlastin genes related to grooming behavior in five races of honey bee, Apis mellifera L., 1758 (Hymenoptera: Apidae), in Turkey

Although many methods have been used to control Varroa destructor Anderson & Trueman, 2000 (Acari: Varroidae), the satisfactory results have not yet been achieved. However, research has shown that some colonies of honey bee, Apis mellifera L., 1758 (Hymenoptera: Apidae), exhibit higher resistance or sensitivity to Varroa mites than others. One of the resistance mechanisms based on genetics is grooming behavior and it has been promising for beekeeping. The fact that there are many unanswered questions about grooming behavior led to the idea of this study. Worker bees from five honey bee races in Turkey were individually tested for their grooming behavior in response to V. destructor mite infestation. The quantitation of the expression levels of three candidate genes (neurexin-1, ataxin-3 and atlastin) in each honey bee race with and without grooming behavior was evaluated by quantitative polymerase chain reaction. Although expression levels of neurexin-1, ataxin-3 and atlastin genes showed significant differences among individuals, grooming levels of individuals were not related to the expression levels of these genes except in Syrian honeybees. Also, phenotypically no statistical differences were found among the honey bee races in terms of grooming behavior. The results show that grooming behavior may not be associated with neural gene expression alone. However, it is seen that more molecular studies related to grooming behavior are needed.

Drosophila functional screening of de novo variants in autism uncovers damaging variants and facilitates discovery of rare neurodevelopmental diseases.

SUMMARYIndividuals with autism spectrum disorder (ASD) exhibit an increased burden of de novo mutations (DNMs) in a broadening range of genes. While these studies have implicated hundreds of genes in ASD pathogenesis, which DNMs cause functional consequences in vivo remains unclear. We functionally test the effects of ASD missense DNMs using Drosophila through “humanization” rescue and overexpression-based strategies. We examine 79 ASD variants in 74 genes identified in the Simons Simplex Collection and find 38% of them to cause functional alterations. Moreover, we identify GLRA2 as the cause of a spectrum of neurodevelopmental phenotypes beyond ASD in 13 previously undiagnosed subjects. Functional characterization of variants in ASD candidate genes points to conserved neurobiological mechanisms and facilitates gene discovery for rare neurodevelopmental diseases.