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Sexual behavior in humans

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https://www.readbyqxmd.com/read/29331353/mechanisms-of-sex-differences-in-fear-and-posttraumatic-stress-disorder
#1
REVIEW
Teniel Sonya Ramikie, Kerry James Ressler
Following sexual maturity, females disproportionately have higher rates of posttraumatic stress disorder (PTSD) and experience greater symptom severity and chronicity as compared with males. This observation has led many to examine sex differences in PTSD risk factors. Though relatively few, these studies reveal that the root causes of PTSD sex differences are complex, and partly represent interactions between sex-specific nonbiological and biological risk factors, which differentially shape PTSD vulnerability...
November 21, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29316511/young-africans-social-representations-of-rape-in-their-hiv-related-creative-narratives-2005-2014-rape-myths-and-alternative-narratives
#2
Robyn Singleton, Kate Winskell, Siphiwe Nkambule-Vilakati, Gaëlle Sabben
Sexual violence is both a major human rights issue and an important driver of HIV infection in sub-Saharan Africa. While quantitative indicators of sexual violence have evolved to facilitate cross-national comparison and country-level decision making, qualitative findings typically remain constrained to single sites and populations. We analyzed social representations of sexual violence, specifically rape, in a sample of 1446 narratives about HIV written by young Africans between 2005 and 2014. The narratives were written at 5 discrete time points (2005, 2008, 2011, 2013 and 2014) by equal numbers of males and females aged 10-24 in urban and rural areas of Swaziland, Kenya, South-East Nigeria, Burkina Faso and Senegal...
December 26, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/29315236/understanding-the-role-of-intrinsic-disorder-of-viral-proteins-in-the-oncogenicity-of-different-types-of-hpv
#3
Elvira Regina Tamarozzi, Silvana Giuliatti
Intrinsic disorder is very important in the biological function of several proteins, and is directly linked to their foldability during interaction with their targets. There is a close relationship between the intrinsically disordered proteins and the process of carcinogenesis involving viral pathogens. Among these pathogens, we have highlighted the human papillomavirus (HPV) in this study. HPV is currently among the most common sexually transmitted infections, besides being the cause of several types of cancer...
January 9, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29302583/tp53-r72p-polymorphism-and-susceptibility-to-human-papillomavirus-infection-among-women-with-human-immunodeficiency-virus-in-morocco-a-case-control-study
#4
Ahd Oulad Lahsen, Hanâ Baba, Rajaa Bensghir, Naouar Fayssel, Mustapha Sodqi, Latifa Marih, Sellama Nadifi, Lahcen Wakrim, Kamal Marhoum El Filali, Sayeh Ezzikouri
Background: Human papillomavirus (HPV) is the most common sexually transmitted agent worldwide. HPV is the main causative agent for cervical cancer. The HPV oncoprotein E6 binds to the tumor suppressor gene product p53, promoting its degradation; the Arg allele of TP53 R72P polymorphism binds more ardently with HPV E6 than the Pro variant. Here, we investigated whether TP53 R72P gene variant, rs104252, was associated with susceptibility to HPV infection in women with human immunodeficiency virus (HIV)...
December 2017: Journal of Cancer Prevention
https://www.readbyqxmd.com/read/29300723/sexual-intercourse-among-high-school-students-29-states-and-united-states-overall-2005-2015
#5
Kathleen A Ethier, Laura Kann, Timothy McManus
Early initiation of sexual activity is associated with having more sexual partners, not using condoms, sexually transmitted infection (STI), and pregnancy during adolescence (1,2). The majority of adolescents initiate sexual activity during high school, and the proportion of high school students who have ever had sexual intercourse increases by grade; black students are more likely to have ever had sexual intercourse than are white students (3). The proportion of high school students overall who had ever had sexual intercourse did not change significantly during 1995-2005 (53...
January 5, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29297755/hiv-education-and-sexual-risk-behaviors-among-young-men-who-have-sex-with-men
#6
Julia Raifman, Chris Beyrer, Renata Arrington-Sanders
PURPOSE: Men who have sex with men (MSM) have nearly 80 times the lifetime risk of human immunodeficiency virus (HIV) relative to men who have sex with women only (MSW), and young MSM (YMSM) accounted for 95% of estimated HIV diagnoses among adolescents between 13 and 24 years in 2015. We aimed to evaluate HIV education and sexual risk behaviors among YMSM relative to young MSW (YMSW) and to evaluate the relationship between HIV education and YMSM sexual risk behaviors. METHODS: We used Youth Risk Behavior Surveillance System data from 13 states that collected information on sex of sexual contacts and on HIV education in 2011 and/or 2013...
January 3, 2018: LGBT Health
https://www.readbyqxmd.com/read/29294855/psychological-violence-and-sexual-risk-behavior-among-predominantly-african-american-women
#7
Bina Ali, Mona Mittal, Allison Schroder, Najah Ishman, Sylvia Quinton, Bradley Boekeloo
Physical and sexual violence are commonly researched as risk factors for human immunodeficiency virus (HIV). However, psychological violence and its relationship with HIV risk behaviors have received limited attention among African American/Black (Black) women. This study examined (a) the frequency of recent (past 3 months) psychological violence, physical violence, and sexual violence and (b) the association of HIV risk behaviors, including unprotected sex, sex under the influence of alcohol/drugs, and sex exchange for money/drugs/shelter, with psychological violence...
July 1, 2017: Journal of Interpersonal Violence
https://www.readbyqxmd.com/read/29276479/digit-ratio-2d-4d-predicts-self-reported-measures-of-general-competitiveness-but-not-behavior-in-economic-experiments
#8
Werner Bönte, Vivien D Procher, Diemo Urbig, Martin Voracek
The ratio of index finger length to ring finger length (2D:4D) is considered to be a putative biomarker of prenatal androgen exposure (PAE), with previous research suggesting that 2D:4D is associated with human behaviors, especially sex-typical behaviors. This study empirically examines the relationship between 2D:4D and individual competitiveness, a behavioral trait that is found to be sexually dimorphic. We employ two related, but distinct, measures of competitiveness, namely behavioral measures obtained from economic experiments and psychometric self-reported measures...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29275048/changes-in-male-rat-sexual-behavior-and-brain-activity-revealed-by-functional-magnetic-resonance-imaging-in-response-to-chronic-mild-stress
#9
Guotao Chen, Baibing Yang, Jianhuai Chen, Leilei Zhu, Hesong Jiang, Wen Yu, Fengchao Zang, Yun Chen, Yutian Dai
BACKGROUND: Non-organic erectile dysfunction (noED) at functional imaging has been related to abnormal brain activity and requires animal models for further research on the associated molecular mechanisms. AIM: To develop a noED animal model based on chronic mild stress and investigate brain activity changes. METHODS: We used 6 weeks of chronic mild stress to induce depression. The sucrose consumption test was used to assess the hedonic state...
December 20, 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29259726/does-toxoplasma-infection-increase-sexual-masochism-and-submissiveness-yes-and-no
#10
Jaroslav Flegr
The parasite Toxoplasma needs to get from its intermediate hosts, e.g. rodents, to its definitive hosts, cats, by predation. To increase the probability of this occurrence, Toxoplasma manipulates the behavior of its hosts, for example, by the demethylation of promoters of certain genes in the host's amygdala. After this modification, the stimuli that normally activate fear-related circuits, e.g., the smell of a cat in mice, or smell of leopards in chimpanzees, start to additionally co-activate sexual arousal-related circuits in the infected animals...
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/29259326/incidence-of-anogenital-warts-in-liuzhou-south-china-a-comparison-of-data-from-a-prospective-study-and-from-the-national-surveillance-system
#11
Feixue Wei, Wei Sheng, Xin Wu, Kai Yin, Jian Lan, Yue Huang, Xinjing Ma, Ya Zheng, Sijie Zhuang, Shoujie Huang, Yingying Su, Mingqiang Li, Ting Wu, Jun Zhang, Ningshao Xia
To determine the incidence of anogenital warts (AGWs) in the Chinese general population, we compared the data from a prospective study and from the National Notifiable Disease Report System (NNDRS). A cohort study including 2378 women and 2309 men aged 18-55 years old enrolled from Liuzhou, China, was conducted with three scheduled visits at 6-month intervals from May 2014 to March 2016. And, a questionnaire survey was performed to collect the diagnosis history of AGWs at the enrollment visit. The data on reported AGW cases of Liuzhou in the NNDRS from 2006 to 2015 were also analyzed...
December 20, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29258561/a-pilot-investigation-on-dna-methylation-modifications-associated-with-complex-posttraumatic-symptoms-in-elderly-traumatized-in-childhood
#12
Zoya Marinova, Andreas Maercker, Edna Grünblatt, Tomasz K Wojdacz, Susanne Walitza
OBJECTIVE: Complex posttraumatic stress disorder (CPTSD) is a newly proposed diagnosis in the International Classification of Diseases-version 11, which is currently intensively investigated. Childhood trauma is regarded as main source of CPTSD symptoms, even in later life. Induction of DNA methylation changes by childhood trauma may contribute to its long-lasting adverse health consequences. The current study analyzed the correlation of genome-wide DNA methylation profiles with complex posttraumatic sequelae in buccal epithelial cells from 31 elderly former indentured child laborers (Verdingkinder) using the Infinium Illumina 450k Human DNA methylation chip...
December 19, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29248392/targeting-human-immunodeficiency-virus-pre-exposure-prophylaxis-to-adolescent-sexual-minority-males-in-higher-prevalence-areas-of-the-united-states-a-modeling-study
#13
Steven M Goodreau, Deven T Hamilton, Samuel M Jenness, Patrick S Sullivan, Rachel K Valencia, Li Yan Wang, Richard L Dunville, Lisa C Barrios, Eli S Rosenberg
PURPOSE: Pre-exposure prophylaxis (PrEP) is an effective and safe intervention to prevent human immunodeficiency virus (HIV) transmission in men who have sex with men; current Centers for Disease Control and Prevention guidelines indicate its use among high-risk adults. Adolescent sexual minority males (ASMM) also have significant HIV risk, but implementation strategies are likely to differ for this population. We aimed to estimate impact and efficiency of PrEP for ASMM in higher prevalence US settings, using a variety of implementation strategies and assumptions about coverage, adherence, and background prevalence...
December 13, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/29247299/influence-of-body-odors-and-gender-on-perceived-genital-arousal
#14
Patrícia Alves-Oliveira, Joana Carvalho, Jacqueline Ferreira, Laura Alho, Pedro Nobre, Mats J Olsson, Sandra C Soares
Olfaction is often linked to mating behavior in nonhumans. Additionally, studies in mating behavior have shown that women seem to be more affected by odor cues than men. However, the relationship between odor cues and sexual response-specifically, sexual arousal-has not been studied yet. The aim of this study was to evaluate the impact of the exposure to human body odors (from individuals of the opposite gender) on perceived genital arousal, while these were presented concomitantly to sexually explicit video clips...
December 15, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/29246195/co-infection-of-sexually-transmitted-pathogens-and-human-papillomavirus-in-cervical-samples-of-women-of-brazil
#15
Aline Teixeira Amorim, Lucas Miranda Marques, Guilherme Barreto Campos, Tássia Neves Lobão, Vanesca de Souza Lino, Ricardo Cesar Cintra, Maria Antonieta Andreoli, Luisa Lina Villa, Enrique Boccardo, Antonio Carlos Ricardo Braga Junior, Rossana Verónica Mendoza López, Djanilson Barbosa Dos Santos, Gerson Maciel de Souza, Carla Cristina Romano, Jorge Timenetsky
BACKGROUND: Some sexually transmitted infectious agents, such as Chlamydia trachomatis and Herpes simplex, cause local inflammation, and could contribute to Human Papillomavirus (HPV) and cervical lesion progression. Thus, the aim of this study was to determine any association between the presence of microorganisms of gynecological importance, sexual behavior, clinical and demographical variables to the development and progress of cervical lesions. METHODS: One hundred and thirty-two women between 14 and 78 years and living at Vitória da Conquista, Bahia, Brazil, were included (62 individuals with cervical lesions and 70 without lesions)...
December 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29237298/passion-relational-mobility-and-proof-of-commitment-a-comparative-socio-ecological-analysis-of-an-adaptive-emotion-in-a-sexual-market
#16
Junko Yamada, Mie Kito, Masaki Yuki
Although monogamy, the exclusive bonding with a specific partner, is one characteristic of modern human mating, long-term romantic relationships inherently possess the commitment problem, which is the conflict between maintaining a relationship with a certain partner and seeking attractive alternatives. Frank has argued that love and passion help solve this problem because they make individuals commit voluntarily to the relationship, leading the other party to also be committed with less concern over being cheated on or rejected...
October 2017: Evolutionary Psychology: An International Journal of Evolutionary Approaches to Psychology and Behavior
https://www.readbyqxmd.com/read/29237239/sex-steroid-hormones-and-brain-function-pet-imaging-as-a-tool-for-research
#17
REVIEW
R Moraga-Amaro, A van Waarde, J Doorduin, E F J de Vries
Sex steroid hormones are major regulators of sexual characteristic among species. These hormones, however, are also produced in the brain. Steroidal hormone-mediated signaling via the corresponding hormone receptors can influence brain function at a cellular level and thus affect behavior and higher brain functions. Altered steroid hormone signaling has been associated with psychiatric disorders, such as anxiety and depression. Neurosteroids are also thought to have a neuroprotective effect in neurodegenerative diseases So far, the role of steroid hormone receptors in physiological and pathological conditions have mainly been investigated post-mortem on animal or human brain tissues...
December 13, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29236761/knowledge-about-human-papillomavirus-and-prevention-of-cervical-cancer-among-women-of-arkhangelsk-northwest-russia
#18
Elena E Roik, Ekaterina E Sharashova, Evert Nieboer, Olga A Kharkova, Vitaly A Postoev, Jon Ø Odland
BACKGROUND: Knowledge about cervical cancer (CC) risk factors and benefits of CC prevention motivates women to participate in its screening. However, several studies show that there is a significant knowledge deficit worldwide about human papillomavirus (HPV). The current study explores the level of knowledge about HPV and CC prevention in the context of sociodemographic and behavioral characteristics of women who visited an antenatal clinic in Arkhangelsk, Russia. METHODS: This cross-sectional study was conducted in the city of Arkhangelsk, which seats the administrative center of Arkhangelsk County, Northwest Russia...
2017: PloS One
https://www.readbyqxmd.com/read/29230601/deer-mates-a-quantitative-study-of-heterospecific-sexual-behaviors-performed-by-japanese-macaques-toward-sika-deer
#19
Noëlle Gunst, Paul L Vasey, Jean-Baptiste Leca
This is the first quantitative study of heterospecific sexual behavior between a non-human primate and a non-primate species. We observed multiple occurrences of free-ranging adolescent female Japanese macaques (Macaca fuscata) performing mounts and sexual solicitations toward sika deer (Cervus nippon) at Minoo, central Japan. Our comparative description of monkey-deer versus monkey-monkey interactions supported the "heterospecific sexual behavior" hypothesis: the mounts and demonstrative solicitations performed by adolescent female Japanese macaques toward sika deer were sexual in nature...
December 11, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/29216311/amelioration-of-sexual-behavior-and-motor-activity-deficits-in-a-castrated-rodent-model-with-a-selective-androgen-receptor-modulator-sarm-2f
#20
Megumi Morimoto, Yuichiro Amano, Masahiro Oka, Ayako Harada, Hisashi Fujita, Yukiko Hikichi, Ryuichi Tozawa, Masuo Yamaoka, Takahito Hara
Sarcopenia and cachexia present characteristic features of a decrease in skeletal muscle mass and strength, anorexia, and lack of motivation. Treatments for these diseases have not yet been established, although selective androgen receptor modulators (SARMs) are considered as therapeutic targets. We previously reported that a novel SARM compound, SARM-2f, exhibits anabolic effect on muscles, with less stimulatory effect on prostate weight compared with testosterone, in rat Hershberger assays and cancer cachexia models...
2017: PloS One
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