Sex Reassignment Research Articles

Specific Morphology of Coronary Artery Aneurysms in Mainly White Patients With Kawasaki Disease: Initial Data From the Cardiac Catheterization in Kawasaki Disease Registry.

Patients with Kawasaki disease (KD) with coronary artery involvement require long-term cardiac care. Although respective evidence-based recommendations are missing, cardiac catheterization is still considered the gold standard for diagnosing detailed coronary pathology. Therefore, to better understand coronary artery pathology development, we conducted a survey to document and evaluate cardiac catheterization data in a European population. We retrospectively analyzed cardiac catheterization data from KD children from the year 2010 until April 2023. This registry covers basic acute-phase clinical data, and more importantly, detailed information on morphology, distribution, and the development of coronary artery pathologies. A total of 164 mainly White patients (65% boys) were included. A relevant number of patients had no coronary artery aneurysm (CAA) at the cardiac catheterization, indicating that distal CAAs were almost exclusively detected alongside proximal CAAs. Patients with multiple CAAs revealed a significant positive correlation between the number of CAAs and their dimensions in diameter and in length. Location of the CAA within the coronary artery, age at onset of KD, or natal sex did not significantly influence CAA diameters, but CAAs were longer in older children and in boys. That distal CAAs were only present together with proximal ones will hopefully reduce diagnostic CCs in patients with KD without echocardiographically detected proximal CAAs. Furthermore, this study gives valuable insights into dimensional specifics of CAAs in patients with KD. As an ongoing registry, future analyses will further explore long-term outcomes and performed treatments, helping to refine clinical long-term strategies for patients with KD. URL: https://drks.de/; Unique Identifier: DRKS00031022.

Preoperative prediction of early recurrence in patients with BRAF mutant colorectal cancer using a intergrated nomogram

Objective To explore the predictive value of radiomics nomogram combining with CT radiomics features and clinical features for postoperative early recurrence in patients with BRAF-mutant colorectal cancer. Methods A total of 220 patients with surgically and pathologically confirmed BRAF-mutant colorectal cancer from 2 institutions were retrospectively included. All patients from institution 1 were randomized at a 7:3 ratio into a training cohort (n = 108) and an internal validation cohort (n = 45), and patients from institution 2 were used as an external validation cohort (n = 67). The association between the radiomics features and early recurrence was assessed in the training cohort and verified in the validation cohort. Furthermore, the performance of the radiomics nomogram was evaluated by combining the rad-score and clinical risk factors. The predictive performance was evaluated by receiver operating characteristic curve analysis, calibration curve analysis, and decision curve analysis. Results The dierenees in the Lymphocyte/monocyte ratio (LMR) and Peripheral nerve infiltration (PNI) were statistically significant between the early recurrence in BRAF-mutant colorectal cancer groups and the early non-recurrence in BRAF-mutant colorectal cancer groups (P < 0.05); The two groups showed no significant differenee in clinical parameters including age, sex, and biochemistry serum markers (P > 0.05). Comparing with the pure radiomics or clinical data, combined models can be seen that the addition of LMR and PNI further improveed the predictive efficiency of the model. The rad-score based on LR, generated by 4 selected radiomics features, demonstrated a favorable ability to predict early recurrence in both the training (AUC 0.81), internal validation (AUC 0.73), external validation (AUC 0.63) cohorts. Subsequently, integrating two independent predictors into a nomogram exhibited more favorable discriminatory performance, with the AUC improved to 0.88 and 0.81 in both cohorts. Conclusions The proposed CT-based radiomics signature is associated with early recurrence among the patients with BRAF-mutant colorectal cancer. The present study also proposes a combined model can potentially be applied in the individual preoperative prediction of early recurrence in patients with BRAF-mutant colorectal cancer. Advances in knowledge CT-based radiomics showed satisfactory diagnostic significance for early recurrence in patients with BRAF-mutant colorectal cancer. Key baseline clinical characteristics were associated with early recurrence in patients with BRAF-mutant colorectal cancer. The combined model may be applied in the individual preoperative prediction of early recurrence in patients with BRAF-mutant colorectal cancer.

Age-Related Increase in Type C Tympanogram

Background: This study evaluated the relationship between aging and tympanometric changes, specifically the incidence of type C tympanograms, using data from the Korea National Health and Nutrition Examination Survey (KNHANES). Methods: We analyzed data from the 2019–2022 KNHANES, including 26,738 ears from individuals aged 40 and older. Tympanometry at 226 Hz identified type C tympanograms based on peak pressure below −100 daPa. Multiple logistic regression evaluated the association between age and type C tympanograms, adjusting for confounders such as sex, smoking status, allergic rhinitis, chronic sinusitis, and lifestyle disease markers. Results: The incidence of type C tympanograms increased significantly with age (R2 = 0.953, p &lt; 0.001). Age was the most significant factor associated with type C tympanograms (p &lt; 0.001, odds ratio 1.052), while other factors were not statistically significant. Ears with type C tympanograms had significantly poorer hearing thresholds compared to those with type A tympanograms (p &lt; 0.001). Conclusions: Aging is significantly associated with an increased incidence of type C tympanograms, indicating possible middle ear dysfunction in older adults. The correlation between type C tympanograms and poorer hearing thresholds suggests that age-related changes in middle ear function may contribute to hearing impairment. Tympanometric screening in older adults may facilitate early detection and management of middle ear dysfunction, potentially improving hearing outcomes and quality of life.

6719 Sex Differences In Lipoproteins And Excess Risk Of Coronary Heart Disease In Women With Type 2 Diabetes

Abstract Disclosure: Y. Yoshida: None. D. Li: None. X. Li: None. V.A. Fonseca: None. L. Qi: None. F. Mauvais-Jarvis: None. Background: Women with type 2 diabetes (T2D) have a greater risk of coronary heart disease (CHD) than men with T2D. We compared levels of lipoproteins and their associations with CHD in women and men with new-onset T2D, pre-diabetes (PDM), and euglycemia. Method: We obtained circulating metabolomic data, including lipoprotein classes, apolipoproteins, total triglycerides (TG), and TG in very large LDL (VLDL), LDL, and HDL by nuclear magnetic resonance for 95,108 CHD-free people at baseline and incident CHD from the national health registers of the UK Biobank study. We used multivariable linear regressions to examine the association between sex and lipoprotein markers (log(x)) in groups of new-onset T2D (new T2D diagnosis or diabetes medication use within two years from the baseline), PDM (HbA1c 5.7-6.5%), and euglycemia, accounting for age, race, Townsend Deprivation Index, income, smoking, obesity, medications for hypertension, hyperlipidemia, and diabetes. We used Cox proportional hazard models to evaluate the association between lipoproteins and CHD risk in men and women separately, adjusting the same covariates. We performed sensitivity analyses using the assay-measured lipoproteins of the same participants and accounted for menopausal status. False discovery rate adjusted for multiple comparisons. Results: 1328 individuals with newly diagnosed T2D, 6204 with PDM, and 87,576 with euglycemia were included in the analysis. In adjusted linear regressions, atherogenic lipoproteins, including total cholesterol (c), non-HDL-c, remnant-c, and LDL-c were significantly higher in women than in men across glycemic status, and this sex difference was the most striking in the T2D group (β 0.5, 0.3, 0.15, and 0.23 in T2D vs. 0.44, 0.16, 0.09, and 0.12 in PDM vs. 0.37, 0.08, 0.04, and 0.08 in euglycemia). In euglycemic individuals, levels of Apo B and VLDL were higher in men than in women (β -0.01 and -0.05); however, in T2D individuals, women had higher levels of VLDL(β 0.05 and 0.05). Total TG and TG in VLDL were significantly higher in men with euglycemia (β -0.22 and -0.23) and PDM (β -0.15 and -0.16), but the sex differences were not significant in the T2D group (β -0.01 and -0.04). During the median 10-year follow-up, one SD increase in total TG (women HR 2.5, 95% 1.3-4.9 vs. men 1.07, 0.7-1.7 P-interaction=0.03), TG in VLDL (W 2.1, 1.2-3.7 vs. M 1.06 0.7-1.6 P=0.03), TG in LDL (W 3.2, 1.2-8.8 vs. M 1.3, 0.7-2.6, P=0.1), and TG in HDL (W 3.7, 1.4-9.5 vs. M 0.9, 0.5-1.7, P=0.008) was significantly associated with increased risk of CHD in women with T2D, but the associations were not significant in male patients. Results from available assay-measured markers and menopausal stratification were generally consistent with the main results. Conclusions: Women had higher levels of atherogenic lipids than men with advancing glycemic status. Women with T2D are at a higher risk of CHD associated with TG than men with T2D. Presentation: 6/3/2024

Differentiating primary from metastatic ovarian tumors of gastrointestinal origin by CT

PurposeTo determine differentiating CT imaging features of primary ovarian cancers from ovarian metastases of gastrointestinal origin. MethodsRetrospective study of 50 patients with new ovarian lesions on CT, half were primary ovarian cancers and half gastrointestinal metastases. Two blinded independent readers described tumor characteristics on CT (size, laterality, margin, etc.) and ancillary features (ascites, peritoneal seeding, lymphadenopathy, etc.). Patient age, sex, cancer history, and tumor marker levels for CA-125 and CEA were collected. Wilcoxon test and Pearson's chi-squared test were used for statistical analysis. Results50 patients with mean age of 62.1 years were included. Ovarian metastases were more likely to be cystic/mainly cystic (p=0.013), have smooth margins (p=0.011), and have no/mild enhancement (p<0.001). Primary ovarian lesions were associated with moderate to large volume of ascites (p=0.047) and more commonly seen with lymphadenopathy (p=0.008). Laterality was not significantly different between the two groups. CA-125 level was more commonly elevated in primary ovarian lesions (87% vs 50%, p=0.018), and with much higher values (1076.5 vs 155.1, p=0.013). CEA level was more commonly elevated in metastatic ovarian lesions (83.3% vs 15.4%, p<0.001), and with higher values (72.4 vs 2.1, p<0.001). ConclusionOvarian metastases were more frequently smooth-margined and cystic with little enhancement. Primary ovarian lesions were more commonly associated with lymphadenopathy and larger volume of ascites. Tumor markers CEA and CA-125 were more frequently elevated in metastatic and primary lesions, respectively. Cancer history was the only variable that increased the odds of metastasis and therefore it is important to always correlate with history of cancer.

Luteinizing hormone is independently associated with high-sensitive cardiac troponin T elevation in postmenopausal T2DM patients: A cross-sectional study.

It is known that the risk of ischemic heart disease increases in patients with type 2 diabetes mellitus (T2DM). For female patients, the incidence of heart disease can be even greater after menopause, accompanied by dramatic changes in sex hormones. We investigated the correlations between sex hormones and markers of ischemic heart diseases in postmenopausal females with T2DM patients. This cross-sectional study collected data from 324 hospitalized postmenopausal females with T2DM. Multiple linear regression analyses were conducted to determine the correlations between sex hormones and cardiac markers including high-sensitive cardiac troponin T (hs-cTnT) and N-terminal prohormone of brain natriuretic peptide (NT-proBNP) levels. Multiple linear regression analyses revealed that luteinizing hormone (LH) was positively and independently associated with hs-cTnT concentrations in postmenopausal females with T2DM (β = 0.189, p = 0.002). Postmenopausal females with T2DM and subclinical myocardial injury had higher LH levels than those without subclinical myocardial injury (29.67 vs. 25.08 mIU/mL, p < 0.001). A multivariate logistic regression analysis confirmed an independent and significant association between elevated LH and subclinical myocardial injury in postmenopausal females with T2DM (adjusted odds ratio [OR] = 1.077, 95% confidence interval [CI], 1.033-1.124; p < 0.001). As another gonadotropin, the follicle-stimulating hormone did not show independent correlations with hs-cTnT or NT-proBNP (p > 0.05). Neither estrogen nor testosterone was correlated with cardiac markers. Elevated LH levels were positively and independently associated with increased hs-cTnT levels in postmenopausal women with T2DM. Our findings suggest that LH could serve as a potential marker for assessing the risk of subclinical myocardial injury in postmenopausal females with T2DM.

Family creation by combined use of ART and surrogacy in a transgender couple: a unique case report

In 2014 a 36-year-old healthy female-to-male transgender patient attended the London Women's Clinic to consider oocyte and embryo freezing before sex reassignment surgery. The patient began IVF treatment in 2015; from two cycles nine MII oocytes and five blastocysts were frozen. Three years later the patient returned with his partner, a 39-year-old healthy transgender male-to-female, ready to start a family with surrogacy treatment. The surrogate delivered a healthy baby girl born at term in 2021 via Caesarean section, with a second successfully delivered in 2022. To our knowledge this is the first case report of successful family creation in which both partners are transgender.

A statistical evaluation of the sexual dimorphism of the acetabulum in an Iberian population.

Sex estimation is essential for human identification within bioarchaeological and medico-legal contexts. Amongst the sexually dimorphic skeletal elements commonly utilised for this purpose, the pelvis is usually preferred because of its direct relationship with reproduction. Furthermore, the posterior part of the innominate bone has proven to have better preservation within degraded contexts. With the aim of investigating the potential of the vertical acetabular diameter as a sex marker, 668 documented individuals from three different Iberian skeletal collections were randomly divided into training and test samples and eventually analysed using different statistical approaches. Two traditional (Discriminant Function Analysis and Logistic Regression Analysis) and four Machine learning methodologies (Support Vector Classification, Decision Tree Classification, k Nearest Neighbour Classification, and Neural Networks) were performed and compared. Amongst these statistical modalities, Machine Learning methodologies yielded better accuracy outcomes, with DTC garnering highest accuracy percentages of 83.59% and 89.85% with the sex-pooled and female samples, respectively. With males, ANN yielded highest accuracy percentage of 87.70%, when compared to other statistical approaches. Higher accuracy obtained with ML, along with its minimal statistical assumptions, warrant these approaches to be increasingly utilised for further investigations involving sex estimation and human identification. In this line, the creation of a statistical platform with easier user interface can render such robust statistical modalities accessible to researchers and practitioners, effectively maximising its practical use. Future investigations should attempt to achieve this goal, alongside examining the influence of factors such as age, on the obtained accuracy outcomes.

Individual Identification and Assessment of Genetic Diversity Using Microsatellite Markers in Racing Pigeons Raised in Turkiye

The implementation of a swift and economical molecular genetic approach, ensuring both efficacy and cost-effectiveness and facilitating population certification, is of utmost significance for breeders and the conservation of Turkiye's native pigeon biodiversity. In this study, we aimed to examine the genetic structure of racing pigeons (Columba livia domestica) raised in Turkiye using a genetic marker panel consisting of eight short tandem repeat (STR) loci. For this purpose, DNA was isolated from the shed feathers of 216 pigeons. Genomic DNA was amplified using the multiplex allele-specific PCR and subsequent capillary electrophoresis with ABI PRISM 3130XL Genetic Analyzer. Next, PCR products were analyzed in the GeneMapper Software program (Applied Biosystems). For parent testing, paternity index (PI), combined paternity index (CPI), and cumulative probability of paternity (CPP) were calculated. Furthermore, population genetic diversity was evaluated using heterozygosity (He), polymorphism information content (PIC), and Hardy–Weinberg equilibrium (HWE) testing. Results revealed that the total number of alleles is 81 and the number of alleles per locus varies between 4 and 19. The similarity rate between parent and offspring was calculated as 99.99% and above. Since no pedigree information was given when the samples were analyzed, obtaining this similarity ratio demonstrates the reliability of the panel. He values range from 0.362 to 0.919, and the PIC values range from 0.295 to 0.909. Loci PG-1, PG-2, and PG-3 show significant genetic diversity, with moderate to high PIC values reflecting varied allele frequencies in the population. Consequently, the set of seven STR markers (+ one sex marker) can be applied to identify and confirm parentage on a regular basis, thereby facilitating efficient breeding programs and ensuring genetic diversity conservation. This panel enables efficient pedigree analysis and gender determination, optimizing cost-effectiveness. The methodology presented in this study is ideal for pedigree analysis and breed certification in the Turkish pigeon breeding industry. Consequently, we affirm that the study data carries considerable national importance.

Telehealth for Reproductive Health Services for Economically Disadvantaged Youth

PurposeThere is a lack of studies describing reproductive health service use and outcomes with telehealth in publicly funded clinics in community settings for economically disadvantaged adolescents and young adults (AYA). This study sought to compare use of reproductive health services before and during the COVID-19 pandemic and analyze the types and quality of reproductive health-care services for patients who did and did not complete a telehealth visit. MethodsMedical records were reviewed for AYA who sought reproductive health services at 9 urban family planning and school-based clinics. Visit-type differences and associated factors by year of service and among those who did and did not complete telehealth visits were analyzed. ResultsTwenty-seven thousand nine hundred sixty-one unique patients were served between 2019 and 2021. As compared to 2019, in 2020 and 2021, there were significantly fewer visits by minors (<18 years old) versus young adults (18–24 years old) (p < .001), and by those with male versus female natal sex (p < .001). At least one telehealth visit was completed by 17.98% of patients. Telehealth visit completion was more likely in young adults, female, Black, non-Hispanic, and higher-income patients. Telehealth users were more likely to complete annual sexually transmitted infection testing, had a higher number of visits per year, and had higher odds of requiring a return visit within 2 weeks of the index visit (odds ratio 1.5, 95% confidence intervals 1.41–1.76). DiscussionOur findings illustrate disparities in telehealth use in this population of economically disadvantaged AYA and provides pragmatic targets for future interventions.

Exploitation and Application of a New Genetic Sex Marker Based on Intron Insertion Variation of erc2 Gene in Oplegnathus punctatus.

Spotted knifejaw (Oplegnathus punctatus), one of the most valuable mariculture species, grows with significant sexual dimorphism, with males growing significantly faster than females. O. punctatus not only has excellent growth characteristics and high food value, but also shows high economic value in aquaculture, which has become a hotspot in the field of aquaculture. The current insufficiency of sex marker identification in O. punctatus restricts the process of its unisexual breeding. Rapid identification of sex will help to study the mechanisms of sex determination and accelerate the development of sex-controlled breeding. With the completion of the sequencing of the male and female genomes of O. punctatus, the efficient and precise development of genetic sex markers has been made possible. In this study, we used genome-wide information combined with molecular biology techniques from marker sequences to further establish a rapid method for DNA insertion variant detection in the intron of O. punctatus erc2 gene, which can be used to rapidly, accurately, and efficiently identify whether DNA insertion occurs in the intron of O. punctatus erc2 gene to be detected, and to identify the sex of O. punctatus to be detected. It could also be distinguished by agarose gel electrophoresis, which would shorten the time for accurate identification and improves the detection efficiency. Homozygous comparison of male and female individuals showed that the length of the DNA fragment of the erc2 gene was 239bp on chromosome X1 and 1173bp on chromosome Y. It can therefore be inferred that a 934bp insertion fragment exists on the Y chromosome. The PCR amplification results showed that two DNA fragments of 1173bp and 239bp could be amplified in male O. punctatus, and the 1173bp fragment was a marker fragment specific to the variant intron erc2 gene, while only a single DNA fragment of 239bp was amplified in female O. punctatus. It has important significance and application value in the study of neurotransmitter transmission and environmental adaptability of female and male fish based on erc2 gene, as well as the identification of male and female sex, the preparation of high male fry, and family breeding.

Health care needs and barriers to care among the transgender population: a study from western Rajasthan

BackgroundTransgender people comprise an estimated 0.3–0.5% (25 million) of the global population. The public health agenda focuses on understanding and improving the health and well-being of gender minorities. Transgender (TG) persons often have complex healthcare needs and suffer significant health disparities in multiple arenas. The international literature suggests that this community is at a higher risk of depression, and other mental health problems, including HIV. Many transgender people experience gender dysphoria and seek specific medical needs such as sex reassignment surgeries, implants, hormonal therapies, etc., but are unable to access these services due to financial or social reasons. The objective of this study was to assess the healthcare needs and associated barriers experienced by transgender people in Western Rajasthan. Methodology: A qualitative study was carried out in which multilevel stakeholder interviews were conducted using interview and focus group discussion guides. Data was analyzed using the qualitative thematic analysis technique. Results: Findings reveal that transgender people have expressed their need to access health services for general health needs, including but not limited to mental health, non-communicable diseases, and infectious diseases. Barriers to healthcare services were identified on 3 levels: health system, social and personal. Health system barriers include policy, accessibility, affordability, and acceptability issues. Social factors such as inadequate housing, education, and job opportunities also play an important role in affecting the individual’s health-seeking behavior. The knowledge of healthcare providers in this context was also limited in context of health insurance schemes, package of services available for transgenders and the importance of gender sensitive healthcare. Conclusion: Transgender people expressed the need for mental health services, programs targeting nutritional improvement, gender-affirmation procedures besides regular screening of non-communicable diseases as operational for males and females. Levels of barriers have been identified at various levels ranging from absence of targeted policies to individual behavior.

Gateway to Dignity: Legal Name Changes for Transgender People in the United States

ABSTRACT Since the 1960s, trans people in the United States have been petitioning courts for name changes and sex marker corrections. If, under English common law everyone has the right to change their name at will without legal procedure by simply adopting a new name, why do trans people bother to change their names through formal legal procedures? This article investigates that question through interviews with trans people around the United States who had legally changed their name as well as lawyers and advocates who assisted trans people in this process, many of whom were trans-identified. Participants reported that without a legal name change, trans people face regular challenges to their dignity. Therefore, I argue that legal name changes are a gateway to dignity by assisting trans people with establishing self-worth and facilitating respectful interactions. While participants stressed that everyone should be entitled to have their chosen name respected, when that dignity is not extended, law can be a powerful tool. Court orders reflecting a name change communicate with the force of law what is the correct name for a person.

Cross-sex hormonal replacement: Some effects over mitochondria

Transgender is a term for people whose gender identity or expression differs from their natal sex. These individuals often seek cross-hormonal therapy to simulate the individual´s desired gender. However, the use of estrogens and testosterone has side effects such as a higher propensity to cancer, weight changes and cardiovascular diseases. Testosterone has also been linked with hypertension. Still, little is known about the outcomes and prevalence of metabolic perturbations in the trans community. Here we aim to analyze if cross-administering sexual hormones affects heart mitochondrial function. Mitochondria produces the ATP needed for heart function. In fact, different studies show that mitochondrial dysfunction precedes cardiac damage. In this work we used either female rats castrated and injected with testosterone or male rats castrated and injected with estrogens for 4 months. We performed an electrocardiogram, and then we isolated heart mitochondria to measure the rate of oxygen consumption, calcium fluxes, membrane potential, superoxide dismutase activity, lipoperoxidation and cytokines. We detected wide modifications in all parameters associated to cross-hormonal administration.

Assessment of Biochemical, Inflammatory Biomarkers and Ultra-Processed Food Consumption in Children with Small Intestinal Bacterial Overgrowth: A Cross-Sectional Study.

This study evaluated anthropometric, biochemical, and inflammatory biomarkers, as well as dietary intake in Brazilian children diagnosed with small intestinal bacterial overgrowth (SIBO) and compared them with their counterparts without SIBO. This was a cross-sectional study with 106 children aged 7 to 10 years. A glucose-hydrogen breath test was performed to diagnose small intestinal bacterial overgrowth (SIBO). Anthropometric and dietary characteristics were assessed. Blood samples were collected and serum biochemical parameters and cytokines were measured. The occurrence of SIBO was 13.2%. Age, BMI, BMI/age WC, BFP, sex and biochemical markers were similar between SIBO-positive and SIBO-negative children (p > 0.05). High consumption of ultra-processed foods tended to be higher in SIBO-positive compared to SIBO-negative children (47.8 ± 8.2 vs. 42.6 ± 9.5, p = 0.06). Serum levels of IL-17 were higher in SIBO-positive than in SIBO-negative children [69.5 (5.4-125.7) vs. 53.4 (2.3-157.7), p = 0.03], while serum levels of IL-10 were lower in SIBO-positive than in SIBO-negative children [2.3 (0.6-7.2) vs. 5.7 (0.5-30.8), p = 0.04]. Finally, in a logistic regression adjusted for sex, BMI and age, consumption of ultra-processed foods (p = 0.03) and IL-6 levels (p = 0.003) were found to contribute to the occurrence of SIBO. this study identified for the first time an occurrence of 13% of SIBO in children living in the northeastern region of Brazil and showed that consumption of ultra-processed foods and serum levels of IL-6 may influence the occurrence of the SIBO in the pediatrics population.

Hybridization and introgression in deeply differentiated salamander species – molecular genetics and a reappraisal of Dr. Louis Vallée’s osteological data

Abstract Two morphologically and genetically distinct salamander species (the crested newt, Triturus cristatus and the marbled newt, T. marmoratus) engage over a large area in the west of France where they hybridize at ca. 4%. The species interaction is characterized by ecological differentiation and limited gene flow beyond the F1 hybrid generation. Incompletely isolated species like these allow to investigate the genetic mechanisms and evolutionary forces that maintain their identity in the face of ongoing gene flow, to which a large mosaic hybrid zone provides excellent opportunities. A reanalysis of published morphological data supports the partial breakdown of the species barrier whereas extensive genetic data show that introgression is low yet asymmetric, in line with the dynamics of species replacement inferred earlier. The current work, with seven diagnostic nuclear markers studied for a large sample, revises the estimates of introgression in both T. cristatus (to 0.24%) and T. marmoratus (to 0.11%). Difficulties remain in the recognition of potential triploid hybrids versus backcross hybrids. Haldane’s rule is partially supported, but deeper analyses require the use of a molecular marker for sex that is not yet available.

A comparison of sex‐specific markers for two wild masu salmon populations in Hokkaido, Japan

AbstractWe evaluated the utility of three male‐specific molecular markers, sdY, sdY 227U and OtY2m, in two wild populations of masu salmon (Oncorhynchus masou) in southwestern Hokkaido, Japan. Male‐specific fragments amplified in all phenotypic males across the markers. Phenotypic females were genetically identified as males using sdY (57%) and sdY 227U (4%), but no phenotypic females were identified as males using OtY2m. We conclude that OtY2m was the most reliable sex marker, followed closely by sdY 227U, among those tested in our study populations. Additional research is warranted to test the applicability of these markers in other populations and Oncorhynchus species.

Gender dysphoria in adolescence: examining the rapid-onset hypothesis.

The sharp rise in the number of predominantly natal female adolescents experiencing gender dysphoria and seeking treatment in specialized clinics has sparked acontentious and polarized debate among both the scientific community and the public sphere. Few explanations have been offered for these recent developments. One proposal that has generated considerable attention is the notion of "rapid-onset" gender dysphoria, which is assumed to apply to asubset of adolescents and young adults. First introduced by Lisa Littman in a2018 study of parental reports, it describes asubset of youth, primarily natal females, with no childhood indicators of gender dysphoria but with asudden emergence of gender dysphoria symptoms during puberty or after its completion. For them, identifying as transgender is assumed to serve as amaladaptive coping mechanism for underlying mental health issues and is linked to social influences from peer groups and through social media. The purpose of this article is to analyze this theory and its associated hypotheses against the existing evidence base and to discuss its potential implications for future research and the advancement of treatment paradigms.

Assessment of sex, nut weight, germination vigour, stem growth, and development traits of pistachio cultivars (Pistacia vera L.) used as rootstock

ABSTRACT Pistacia vera L. is the only edible plant with economic importance within Pistacia genus. In the current study, rootstock traits such as growth and development of major pistachio cultivars were evaluated in plants used as rootstock for pistachios in Turkey. The sex of 1008 individuals was determined using a molecular sex marker with HRM analysis. From the eight cultivars, the number of female and male plants were 453 and 413, respectively; and then used for phenotypic measurements. For each measurement period, analysis of variance established that there were no significant ‘cultivar x sex’ interactions or sex effects for stem diameter or stem height. However, the differences among cultivars were highly significant (P < 0.0001) at all measurement times. The maximum stem length and width values were in the progeny of the Ohadi cultivar, with the lowest values recorded for progeny of the Uzun and Kırmızı cultivars. The nut weights and stem properties of the plants were correlated with high positive coefficients, although the germination vigour was not statistically correlated with any other trait. The results of the current paper will aid the selection of candidates for future pistachio rootstock breeding programmes.

Perceived social support, self-esteem, and depression among Indian trans men with and without sex reassignment surgery

The psychological challenges associated with gender identity in developing countries like India are only recently receiving research attention. The study aimed to understand self-esteem, perceived social support, and depression among trans men in India. A comparative analysis was also undertaken between those who have and have not undergone sex reassignment surgery. The sample comprised 30 trans men, out of which 15 had undergone sex reassignment surgery and 15 had not. The Multidimensional Scale of Perceived Social Support, Rosenberg Self-esteem Scale, and Beck’s Depression Inventory-II were used. Perceived social support from family and friends was found to be a significant predictor of self-esteem. Support from all three sources—family, friends, and significant others significantly predicted depression among the total sample. Trans men who had undergone sex reassignment surgery, reported higher self-esteem and lower depression levels, as compared to those who were yet to undergo surgery. The findings highlighted the contribution of social support in fostering the mental health of trans men. The consequent psychological benefits of surgery were also demonstrated. The study has implications for planning and designing mental health interventions for this community.