Theodora Kunovac Kallak

Dr. Theodora Kunovac Kallak

Women's and Children's Health, Uppsala University.

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2013 in Menopause
Verified
Journal Article
Closed access
JBJuliane Baumgart
Juliane Baumgart
KNKerstin Nilsson
Kerstin Nilsson
AEAnneli Stavreus Evers
Anneli Stavreus Evers
TKTheodora Kunovac Kallak
Theodora Kunovac Kallak
IPInger Sundström Poromaa
Inger Sundström Poromaa
Objective The goal of this study was to investigate sexual function in postmenopausal breast cancer patients treated with aromatase inhibitors. Methods A population-based, cross-sectional study was conducted among postmenopausal breast cancer patients on adjuvant endocrine treatment and age-matched controls with and without estrogen treatment. Sexual function was assessed with a standardized questionnaire. Results In all, 42.4% of aromatase inhibitor–treated breast cancer patients were dissatisfied with their sex life in general, and 50.0% reported low sexual interest; this was significantly more common than in tamoxifen-treated patients and controls (P < 0.05). Aromatase inhibitor–treated patients reported insufficient lubrication in 73.9% and dyspareunia in 56.5% of cases, which were significantly more common than in controls, irrespective of hormonal use (P < 0.05). Tamoxifen-treated patients reported significantly more dyspareunia (31.3%; P < 0.05) but resembled controls in all other concerns. Conclusions Our findings suggest that sexual dysfunction in aromatase inhibitor–treated women is a greatly underestimated problem.

1 December 2023 in American Journal of Psychiatry
Verified
Journal Article
Open access
JGJerry Guintivano
Jerry Guintivano
EBEnda M. Byrne
Enda M. Byrne
JKJacqueline Kiewa
Jacqueline Kiewa
SYShuyang Yao
Shuyang Yao
ABAnna E. Bauer
Anna E. Bauer
PSPatrick Sullivan
Patrick Sullivan
Objective: Postpartum depression (PPD) is a common subtype of major depressive disorder (MDD) that is more heritable, yet is understudied in psychiatric genetics. The authors conducted meta-analyses of genome-wide association studies (GWASs) to investigate the genetic architecture of PPD. Method: Meta-analyses were conducted on 18 cohorts of European ancestry (17,339 PPD cases and 53,426 controls), one cohort of East Asian ancestry (975 cases and 3,780 controls), and one cohort of African ancestry (456 cases and 1,255 controls), totaling 18,770 PPD cases and 58,461 controls. Post-GWAS analyses included 1) single-nucleotide polymorphism (SNP)–based heritability , 2) genetic correlations between PPD and other phenotypes, and 3) enrichment of the PPD GWAS findings in 27 human tissues and 265 cell types from the mouse central and peripheral nervous system. Results: No SNP achieved genome-wide significance in the European or the trans-ancestry meta-analyses. The of PPD was 0.14 (SE=0.02). Significant genetic correlations were estimated for PPD with MDD, bipolar disorder, anxiety disorders, posttraumatic stress disorder, insomnia, age at menarche, and polycystic ovary syndrome. Cell-type enrichment analyses implicate inhibitory neurons in the thalamus and cholinergic neurons within septal nuclei of the hypothalamus, a pattern that differs from MDD. Conclusions: While more samples are needed to reach genome-wide levels of significance, the results presented confirm PPD as a polygenic and heritable phenotype. There is also evidence that despite a high correlation with MDD, PPD may have unique genetic components. Cell enrichment results suggest GABAergic neurons, which converge on a common mechanism with the only medication approved by the U.S. Food and Drug Administration for PPD (brexanolone).

1 January 2011 in American Journal of Obstetrics and Gynecology
Verified
Journal Article
Closed access
JBJuliane Baumgart
Juliane Baumgart
KNKerstin Nilsson
Kerstin Nilsson
ASAnneli Stavreus-Evers
Anneli Stavreus-Evers
KKKristiina Kask
Kristiina Kask
KVKenneth Villman
Kenneth Villman
ISInger Sundström-Poromaa
Inger Sundström-Poromaa

1 October 2017 in European Journal of Endocrinology
Verified
Journal Article
Open access
PDF file
TKTheodora Kunovac Kallak
Theodora Kunovac Kallak
CHCharlotte Hellgren
Charlotte Hellgren
ASAlkistis Skalkidou
Alkistis Skalkidou
LSLotta Sandelin-Francke
Lotta Sandelin-Francke
KUKumari Ubhayasekhera
Kumari Ubhayasekhera
IPInger Sundström Poromaa
Inger Sundström Poromaa
Objective: Prenatal androgen exposure has been suggested to play a role in polycystic ovary syndrome. Given the limited information on what maternal characteristics influence maternal testosterone levels, and the even less explored routes by which female fetus androgen exposure would occur, the aim of this study was to investigate the impact of maternal age, BMI, weight gain, depressed mood and aromatase SNPs on testosterone levels in maternal serum and amniotic fluid of female fetuses.Methods: Blood samples from pregnant women (n = 216) obtained in gestational weeks 35–39, and pre-labor amniotic fluid samples from female fetuses (n = 56), taken at planned Caesarean section or in conjunction with amniotomy for induction of labor, were analyzed. Maternal serum testosterone and amniotic fluid testosterone and cortisol were measured by tandem mass spectrometry.Results: Multiparity (β = −0.28,P < 0.001), self-rated depression (β = 0.26,P < 0.001) and weight gain (β = 0.18,P < 0.05) were independent explanatory factors for the maternal total testosterone levels. Maternal age (β = −0.34,P < 0.001), weight gain (β = 0.19,P < 0.05) and amniotic fluid cortisol levels (β = 0.44,P < 0.001) were independent explanatory factors of amniotic fluid testosterone in female fetuses, explaining 64.3% of the variability in amniotic fluid testosterone.Wider implications of the findings: Young maternal age and excessive maternal weight gain may increase the prenatal androgen exposure of female fetuses. Further studies are needed to explore this finding.

22 October 2019 in BMJ Open
Verified
Journal Article
Open access
PDF file
CACathrine Axfors
Cathrine Axfors
EBEmma Bränn
Emma Bränn
HHHanna E Henriksson
Hanna E Henriksson
CHCharlotte Hellgren
Charlotte Hellgren
TKTheodora Kunovac Kallak
Theodora Kunovac Kallak
ASAlkistis Skalkidou
Alkistis Skalkidou
Purpose With the population-based, prospective Biology, Affect, Stress, Imaging and Cognition (BASIC) cohort, we aim to investigate the biopsychosocial aetiological processes involved in perinatal depression (PND) and to pinpoint its predictors in order to improve early detection. Participants From September 2009 to November 2018, the BASIC study at Uppsala University Hospital, Sweden, has enrolled 5492 women, in 6478 pregnancies, of which 46.3% first-time pregnancies and with an average age of 31.5 years. After inclusion around gestational week 16–18, participants are followed-up with data collection points around gestational week 32, at childbirth, as well as three times postpartum: after 6 weeks, 6 months and 1 year. At the last follow-up, 70.8% still remain in the cohort. Findings to date In addition to internet-based surveys with self-report instruments, participants contribute with biological samples, for example, blood samples (maternal and from umbilical cord), biopsies (umbilical cord and placenta) and microbiota samples. A nested case–control subsample also takes part in cognitive and emotional tests, heart rate variability tests and bioimpedance tests. Subprojects have identified various correlates of PND of psychological and obstetric origin in addition to factors of the hypothalamic–pituitary–adrenal axis and immune system. Future plans In parallel with the completion of data collection (final follow-up November 2019), BASIC study data are currently analysed in multiple subprojects. Since 2012, we are conducting an ongoing follow-up study on the participants and their children up to 6 years of age (U-BIRTH). Researchers interested in collaboration may contact Professor Alkistis Skalkidou (corresponding author) with their request to be considered by the BASIC study steering committee.

1 July 2015 in Reproductive BioMedicine Online
Verified
Journal Article
Closed access
TPTriin Pärn
Triin Pärn
RRRaúl Grau Ruiz
Raúl Grau Ruiz
TKTheodora Kunovac Kallak
Theodora Kunovac Kallak
JRJonatan R. Ruiz
Jonatan R. Ruiz
EDEva Davey
Eva Davey
SASigne Altmäe
Signe Altmäe