@article {8297, title = {Understanding the role of personality and alexithymia in food preferences and PROP taste perception.}, journal = {Physiol Behav}, volume = {157}, year = {2016}, month = {2016 Apr 1}, pages = {72-8}, abstract = {

Taste perception and food preferences are influenced by a variety of factors, including personality characteristics. The aims of this study were to examine the role of personality characteristics, such as alexithymia (a personality construct characterized by inability to identify, describe, and work with one{\textquoteright}s own feelings), in: 1) taste responses to the bitter genetic taste-marker PROP and 2) food liking. We studied 649 healthy subjects residing in six genetically-isolated villages of Northeast Italy. Data on PROP taste responsiveness, food liking, personality characteristics and TAS2R28 genotypes were collected. Results showed that PROP non-tasters had higher alexithymia scores than PROP tasters. Moreover, the presence of alexithymia in heterozygous individuals for the rs1726886 polymorphism of the TAS2R38 gene was associated with a reduction in the perceived intensity of PROP. Finally, higher alexithymia scores were associated with liking of alcohol, sweets and fats/meats whereas lower alexithymia scores were related to liking of vegetables, condiments and strong cheeses, Measures of temperament, character, anxiety and depression were also related to food liking. Our findings suggest that: 1) alexithymia, in addition to the TAS2R38 polymorphism, may play a role in responsiveness to the aversive and bitter taste of PROP; and 2) alexithymia, in combination with other personality traits, may provide important insights for better understanding food liking.

}, issn = {1873-507X}, doi = {10.1016/j.physbeh.2016.01.022}, author = {Robino, Antonietta and Mezzavilla, Massimo and Pirastu, Nicola and La Bianca, Martina and Gasparini, Paolo and Carlino, Davide and Tepper, Beverly J} } @article {7775, title = {Analysis of functional variants reveals new candidate genes associated with alexithymia.}, journal = {Psychiatry Res}, volume = {227}, year = {2015}, month = {2015 Jun 30}, pages = {363-5}, abstract = {

In this study we explored the possible association between 36,915 functional variants and alexithymia, a personality trait characterized by the inability to identify and describe emotions and feelings. From our analysis, variants in the genes ABCB4, TP53AIP1, ARHGAP32 and TMEM88B were identified linked to the alexithymia phenotype.

}, keywords = {Adolescent, Adult, Affective Symptoms, Aged, Case-Control Studies, DNA-Binding Proteins, Emotions, Female, Humans, Male, Membrane Proteins, Middle Aged, P-Glycoproteins, Personality Inventory, Phenotype, Tumor Suppressor Proteins, Young Adult}, issn = {1872-7123}, doi = {10.1016/j.psychres.2015.03.018}, author = {Mezzavilla, Massimo and Ulivi, Sheila and Bianca, Martina La and Carlino, Davide and Gasparini, Paolo and Robino, Antonietta} } @article {8070, title = {Brain-derived neurotrophic factor serum levels in genetically isolated populations: gender-specific association with anxiety disorder subtypes but not with anxiety levels or Val66Met polymorphism.}, journal = {PeerJ}, volume = {3}, year = {2015}, month = {2015}, pages = {e1252}, abstract = {

Anxiety disorders (ADs) are disabling chronic disorders with exaggerated behavioral response to threats. This study was aimed at testing the hypothesis that ADs may be associated with reduced neurotrophic activity, particularly of Brain-derived neurotrophic factor (BDNF), and determining possible effects of genetics on serum BDNF concentrations. In 672 adult subjects from six isolated villages in North-Eastern Italy with high inbreeding, we determined serum BDNF levels and identified subjects with different ADs subtypes such as Social and Specific Phobias (PHSOC, PHSP), Generalized Anxiety Disorder (GAD), and Panic Disorder (PAD). Analysis of the population as a whole or individual village showed no significant correlation between serum BDNF levels and Val66Met polymorphism and no association with anxiety levels. Stratification of subjects highlighted a significant decrease in serum BDNF in females with GAD and males with PHSP. This study indicates low heritability and absence of any impact of the Val66Met polymorphism on circulating concentrations of BDNF. Our results show that BDNF is not a general biomarker of anxiety but serum BDNF levels correlate in a gender-specific manner with ADs subtypes.

}, issn = {2167-8359}, doi = {10.7717/peerj.1252}, author = {Carlino, Davide and Francavilla, Ruggiero and Baj, Gabriele and Kulak, Karolina and d{\textquoteright}Adamo, Pio and Ulivi, Sheila and Cappellani, Stefania and Gasparini, Paolo and Tongiorgi, Enrico} }