Neurobiologische, bio-energetische en sociosystemische analyse van de menopauzale overgang

De Cardiovasculaire-Neuroendocrine Metamorfose en de Bio-energetische Crisis van de Verouderende Vrouw

De menopauzeovergang is niet simpelweg een lokaal stoppen van de voortplantingsfunctie; het is een ingrijpende neuro-endocriene herschikking die wordt gekenmerkt door dalende spiegels en onvoorspelbare schommelingen van ovariële steroïden.1Voor het vrouwelijk brein werkt deze verschuiving als een metabolologische “reset”.” Oestrogeen—in het bijzonder 17β-oestradiol (E2)—fungeert als een centrale coördinator van de cerebrale bio-energetica, en helpt te voldoen aan de constante energiebehoefte van de hersenen voor synaptische activiteit en cognitieve robuustheid.2In hippocampale en corticale neuronen is oestrogeengestuurde signalering nauw verbonden met het behoud van aërobe glycolyse en oxidatieve fosforylering. [2Door de ATP-productie te ondersteunen via de citroenzuurcyclusflux en door het bevorderen van glucose beschikbaarheid (inclusief opregulatie van transporters zoals GLUT1), helpt E2 glucose te behouden als de dominante brandstof die door het centrale zenuwstelsel wordt gebruikt. [2]

Naarmate vrouwen de leeftijd van 57 naderen — vaak enkele jaren na menopauze—glucose-utilisatie in de hersenen kan meetbaar verminderd zijn na langdurig verlies van de regulerende effecten van oestrogeen.3Het resultaat is een aanhoudende bio-energetische belasting. Bewijs ondersteunt een vroege, mogelijk bijdragende rol voor mitochondriale disfunctie en hypometabolisme in de hersenen in de cascade die leidt tot de pathologie van de ziekte van Alzheimer (AD).3, 4, 5Wanneer het glucosemetabolisme onvoldoende wordt, compenseert de hersenen door te verschuiven naar alternatieve energiebronnen: eerst door zwaarder te leunen op ketonen-gebaseerd metabolisme en, naarmate het vordert, verder te bewegen naar vetzuuroxidatie. [4, 5Deze aanpassing brengt risico's met zich mee; FAO is in verband gebracht met letsel aan de witte stof en een verhoogde belasting met ketonlichamen.4, 5In feite kan de hersenen beginnen met het consumeren van endogene lipidenvoorraden — in het bijzonder myeline in de witte stof — om de energietoevoer te handhaven, wat de achteruitgang van de connectiviteit en de circuitintegriteit bevordert.4, 5]

Tabel 1. Vergelijkende bio-energetische parameters tijdens de menopauzale overgang

Bio-energetische parameter	Oestrogeenrijke toestand (premenopauze)	Toestand van oestrogeendepletie (postmenopauze)	Implicaties voor neurodegeneratie
Primaire brandstofbron	Glucose (aerobische glycolyse) [2]	Ketonelichamen / vetzuren4, 5]	Hogere amyloïde kwetsbaarheid; verlies van witte stof [4, 5]
ATP-generatie-efficiëntie	Geoptimaliseerd via TCA/OXPHOS [2]	Verminderd; mitochondriale hypofunctie4, 5]	Lagere neuronale stresstolerantie4, 5]
Calciumhomeostase	Gehandhaafd; anti-excitotoxisch2]	Ontregelde kwetsbaarheid6]	Celsterfte in metabool gestresste neuronen4, 5]
Antioxidant defensie	Verbeterd; ROS-buffering2]	Verminderd; oxidatieve stress [3, 4]	Mitochondriale beschadiging, gliale activatie3]
Cholesterol mensenhandel	Efficiënt transport/inklaring5]	Verminderd; plaque-geassocieerde routes5]	Lipidekatabolisme en myeline-afbraak4, 5]

Het model van de “gezonde-cel-bias van oestrogeenwerking” stelt dat de voordelen van hormoontherapie afhangen van de biologische conditie van het neurale systeem op het moment dat oestrogeen wordt toegediend. [2, 4In metabool intacte neuronen heeft oestrogeen de neiging om homeostase en de antioxiderende capaciteit te ondersteunen; wanneer het systeem echter al in een degeneratieve of hypometabole staat verkeert, kan oestrogeen de schade versterken door de energetische vraag op ontregelde routes te verhogen.2, 4] Timing therefore matters for a 57-year-old: initiation of therapy within roughly ten years of the final menstrual period (FMP) is more often associated with favorable cardiometabolic and cognitive risk patterns, while later initiation may provide less benefit. [6, 7, 8]

Affective Regulation and the Window of Vulnerability to Stress

The menopause transition is widely described as a “window of vulnerability” for new or worsening depressive symptoms, anxiety, and irritability. [9, 10] For a 57-year-old woman reporting heightened anxiety and irritability after a major stressor two years earlier, a key mechanism is the intersection of estrogen withdrawal with serotonergic regulation and steroid-linked mood circuitry. [1, 11] Serotonin neurons in the midbrain raphe express estrogen receptor beta and progestin receptors, making them direct targets of ovarian steroids. [11] Estrogen supports serotonergic function in part by regulating synthesis-related pathways (including TPH2-linked mechanisms) and stress responsivity. [11] When estrogen levels fall—or fluctuate sharply—the serotonin system can become more stress-reactive, often presenting clinically as irritability and reduced coping capacity. [11]

The “Estradiol Withdrawal Hypothesis” emphasizes that rapid physiologic shifts, not only low absolute hormone levels, can destabilize mood. [12, 13] Experimental crossover designs show that women with a history of perimenopausal depression (PMD) can experience clinically meaningful symptom recurrence when switched from estradiol to placebo, whereas women without such histories often remain stable under the same manipulation. [12] This pattern supports hormone-flux sensitivity in a biologically susceptible subgroup. [13, 14] For the patient in question, the major stress event two years prior—potentially near the time of her FMP—may have served as an amplifying trigger in a system already sensitized by fluctuating hormones. [13, 14]

Table 2. Risk Factors for Affective Disorders During the Menopausal Transition

Factor	Association with Menopausal Depression/Anxiety	Risk Ratio / Odds Ratio (as reported)
History of depression	Strongest predictor of new/recurrent episodes [9, 10]	Often ~OR 2–5 (varies by cohort) [9]
Menopausal status	Perimenopause vs premenopause increases risk [9, 10]	Often ~OR ~2 (varies by definition) [9]
Hormone variability	Rapid fluctuations in E2/FSH predict symptoms [13, 14]	Predictive association in longitudinal work [13, 14]
Life stressors	Trauma/strain/lack of support modulate risk [13, 14]	Strong interaction effects [13, 14]
Vasomotor symptoms	VMS burden linked to sleep/mood decline [1, 15]	Correlational + bidirectional models [15]

Furthermore, ovarian hormones modulate the hypothalamic-pituitary-adrenal (HPA) axis, which governs the stress response. [11] Estrogen typically facilitates a more regulated stress response; withdrawal can increase stress reactivity and alter cortisol feedback sensitivity. [11] Chronic stress combined with low estrogen may reduce physiologic buffering capacity, plausibly worsening irritability and anxiety in vulnerable patients. [11] For a woman at age 57 whose symptoms intensified after a major stressor at age 55, the clinical picture is consistent with an unregulated stress response compounded by postmenopausal neurochemical and metabolic shifts. [11]

Estrogen Receptor Signaling and Neuroplasticity

Estrogens exert their effects through genomic and non-genomic signaling mediated by estrogen receptor pathways in brain regions critical for memory and emotional regulation (hippocampus, prefrontal cortex). [1, 2, 16] 17β-estradiol (E2) is the predominant and most potent estrogen during reproductive years, while estrone (E1) becomes relatively more prominent after menopause due to peripheral conversion. [1] Estradiol supports neuroplasticity via pathways linked to synaptic maintenance and neurotrophin signaling (including BDNF-associated effects). [2, 16]

Evidence suggests that E2-based approaches may be more consistently aligned with cognitive and mood support than E1-heavy formulations. [6, 7] The density and sensitivity of estrogen signaling systems may shift during the transition, and subjective memory complaints and mood lability are common clinical correlates. [16, 17]

Table 3. Estrogen Variants and Their Impact on Neural Health

Estrogen Type	Primary Biological Source	Effect on Neuroplasticity	Clinical Notes
17β-Estradiol (E2)	Ovarian follicles; local brain [1, 2]	Supports synaptic function [2, 16]	Used in many MHT; route matters [7]
Estrone (E1)	Peripheral adipose conversion [1]	Less consistent benefit vs E2 [6, 17]	Dominant postmenopause fraction [1]
Estetrol (E4)	Fetal liver–derived [18]	Selective tissue profile; evolving [18, 19]	E4COMFORT design published [19]

Vasomotor Symptom Trajectories and Racial Disparities

Vasomotor symptoms (VMS), such as hot flashes and night sweats, arise from hypothalamic thermoregulatory zone narrowing in the context of estrogen withdrawal. [1, 15] Large cohort findings indicate that frequent VMS can persist for many years, with meaningful racial and ethnic disparities in symptom duration and post-FMP persistence. [20]

Table 4. Duration of Vasomotor Symptoms by Racial and Ethnic Group (Cohort Findings)

Racial/Ethnic Group	Median VMS Duration (years)	Median Post-FMP Persistence (years)
African American	10.1 [20]	6.0 [20]
Hispanic	8.9 [20]	6.4 [20]
White (Non-Hispanic)	6.5 [20]	4.6 [20]
Chinese	5.4 [20]	3.5 [20]
Japanese	4.8 [20]	3.3 [20]

Cardiovascular Health and the Timing Hypothesis

Cardiovascular disease (CVD) incidence rises sharply after menopause. [1] Estrogen supports vascular function in part via stikstofoxide–mediated vasodilation and effects on endotheelfunctie. [8] The “timinghypothese” suggests that menopausal hormone therapy initiated in women younger than 60 or within 10 years of menopause onset is less likely to increase CVD risk and may be associated with more favorable outcomes than later initiation. [7, 8]

Initiating therapy later (eg, >10 years postmenopause or after age 65) is more consistently associated with thromboembolic and beroerte risks, in part because established vascular pathology may be less responsive to estrogen’s protective mechanisms. [7, 8] For a 57-year-old woman, initiating treatment generally remains within the favorable window when indicated and when risk screening is appropriate. [7, 8]

Table 5. Cardiovascular and Cognitive Outcomes by HRT Initiation Timing

Timing Window	Cardiovascular Effect	Cognitive / AD Risk Effect
Early postmenopause (<10 yrs)	More favorable profile [7, 8]	Potentially more favorable framing [6, 17]
Late postmenopause (>10 yrs)	Higher adverse event signals [7, 8]	Less consistent benefit; cautious [7, 17]
Age >65 years	Higher thromboembolic risk [7, 8]	Dementia risk signals in late start [7]

Thromboembolic Risk and the Route of Administration

One of the most significant safety considerations in prescribing hormone therapy is venous thromboembolism (VTE). Oral estrogen undergoes hepatic first-pass metabolism, increasing prothrombotic factors and activating coagulation pathways. [21] Observational and clinical data show oral regimens are associated with increased VTE risk. [21, 22]

In contrast, transdermal estrogen bypasses hepatic first-pass metabolism and is associated with lower or neutral VTE risk signals in comparative analyses. [22] For women with risk factors such as obesitas of roken history, transdermal estrogen is commonly preferred when hormone therapy is indicated. [7, 22]

Table 6. VTE Risk by Regimen and Route (Comparative Evidence)

HT Regimen	VTE Association	Evidence Notes
Oral estrogen (general)	Increased VTE risk [21, 22]	Risk varies by formulation and population [21, 22]
Transdermaal oestrogeen	Lower/neutral risk vs oral [22]	Preferred in higher-risk profiles [7, 22]
Progestogen effects	Progestogen choice matters [23]	Micronized progesterone often favored [23]

Oncological Perspectives: Re-evaluating Breast Cancer Risk

The 2002 Women’s Health Initiative (WHI) report significantly influenced clinical practice by identifying increased invasive breast cancer risk with combined estrogen (CEE) and medroxyprogesterone acetate (MPA). [24] Long-term follow-up added nuance: among women with hysterectomy randomized to estrogen alone, breast cancer incidence and mortality were lower than placebo in extended analyses. [25]

Across studies, risk appears to be driven substantially by the progestogen component, particularly synthetic progestins. [23] Micronized progesterone is often preferred in contemporary practice discussions because comparative evidence suggests more favorable risk profiles relative to certain synthetic progestins, with potential sleep-related benefits. [7, 23]

The Role of Androgens and Testosterone Therapy

Testosterone is a crucial hormone in female physiology, and androgen levels decline with age and menopause stage. [26] Physiologic-dose testosterone has evidence-based benefit for hypoactive sexual desire disorder (HSDD) and may improve sexual function without virilization when appropriately dosed and monitored. [26] Some clinical literature and expert discussion also report benefits in energy and well-being in selected patients, though indications beyond HSDD require careful risk-benefit framing. [26, 27]

Table 7. Testosterone in Women: Common Myths vs Evidence

Common Myth	Clinical Reality / Evidence
“Testosterone is only for men”	Consensus recognizes therapy primarily for HSDD [26]
“It causes masculinization”	Low-dose regimens minimize virilization risk [26]
“It increases aggression”	No routine aggression increase at physiologic doses [26]
“It’s only for libido”	Primary supported indication is HSDD [26, 27]
“It causes liver damage”	Non-oral approaches avoid first-pass issues [26]

Socioeconomic Position, Workforce, and Interpersonal Dynamics

The age at natural menopause reflects interactions among genetica, exposures, and socioeconomic position. [28] Higher educational attainment is associated with later menopause, while socioeconomic adversity is linked to earlier onset. [28] This transition occurs during peak professional years, where RAND estimates substantial annual productivity losses attributable to symptoms. [29] Furthermore, menopausal symptoms can affect interpersonal dynamics; divorce rates among adults over 50 have risen substantially since 1990, with women initiating a majority of these divorces. [30]

Next-Generation Estrogen: Estetrol (E4)

Estetrol (E4) is a naturally occurring estrogen produced by the fetal liver and developed as a therapeutic candidate with selective tissue activity. [18] The E4COMFORT I and II trial design has been published in Maturitas (January 2026), evaluating E4 15 mg and 20 mg for reduction in moderate-to-severe VMS, with long-term safety evaluation including endometrial safety. [19] ClinicalTrials registration includes NCT04209543 and NCT04090957. [19]

Clinical Synthesis: Managing the 57-Year-Old Patient

For a 57-year-old postmenopausal woman experiencing increased irritability and anxiety following a significant stress event, the therapeutic goal is to restore neuroendocrine stability while minimizing risks. [7, 8] Her symptom pattern fits a plausible interaction between hormone variability, serotonergic stress vulnerability, and HPA-axis dysregulation. [13, 14, 11]

Recommended Assessment and Treatment Hierarchy

1. Determine stage and severity: Quantify irritability/anxiety impact on quality of life and identify alignment with the “window of vulnerability.” [1, 9, 10]
2. Establish baseline risks: Evaluate cardiovascular markers, breast cancer risk, and VTE profile. [7, 21, 22]
3. Select optimized HT regimen: Prefer transdermal 17β-estradiol and micronized progesterone to minimize VTE and oncological risk signals. [7, 22, 23]
4. Integrative support: Address behavioral interventions that improve sleep and support stress resilience, given the coupling between sleep disruption and mood. [1, 15]

Referenties

1. Santoro N, Epperson CN, Mathews SB. Menopausal Symptoms and Their Management. Endocrinol Metab Clin North Am. 2015;44(3):497-515. doi:10.1016/j.ecl.2015.05.001
2. Rettberg JR, Yao J, Brinton RD. Estrogen: a master regulator of bioenergetic systems in the brain and body. Front Neuroendocrinol. 2014;35(1):8-30. doi:10.1016/j.yfrne.2013.08.001
3. Mosconi L, Berti V, Quinn C, et al. Sex differences in Alzheimer risk: Brain imaging of endocrine vs chronologic aging. Neurology. 2017;89(13):1382-1390. doi:10.1212/WNL.0000000000004425
4. Yao J, Brinton RD. Estrogen regulation of mitochondrial bioenergetics: implications for prevention of Alzheimer’s disease. Adv Pharmacol. 2012;64:327-371. doi:10.1016/B978-0-12-394816-8.00010-6
5. Adlimoghaddam A, Fontaine KM, Albensi BC. Age- and sex-associated alterations in hypothalamic mitochondrial bioenergetics and inflammatory-associated signaling in the 3xTg mouse model of Alzheimer’s disease. Biol Sex Differ. 2024;15(1):95. Published 2024 Nov 25. doi:10.1186/s13293-024-00671-7
6. Sochocka M, Karska J, Pszczołowska M, et al. Cognitive Decline in Early and Premature Menopause. Int J Mol Sci. 2023;24(7):6566. Published 2023 Mar 31. doi:10.3390/ijms24076566
7. “The 2022 Hormone Therapy Position Statement of The North American Menopause Society” Advisory Panel. The 2022 hormone therapy position statement of The North American Menopause Society. Menopause. 2022;29(7):767-794. doi:10.1097/GME.0000000000002028
8. El Khoudary SR, Aggarwal B, Beckie TM, et al. Menopause Transition and Cardiovascular Disease Risk: Implications for Timing of Early Prevention: A Scientific Statement From the American Heart Association. Circulation. 2020;142(25):e506-e532. doi:10.1161/CIR.0000000000000912
9. Maki PM, Kornstein SG, Joffe H, et al. Guidelines for the Evaluation and Treatment of Perimenopausal Depression: Summary and Recommendations. J Womens Health (Larchmt). 2019;28(2):117-134. doi:10.1089/jwh.2018.27099.mensocrec
10. Kulkarni J, Gurvich C, Mu E, et al. Menopause depression: Under recognised and poorly treated. Aust N Z J Psychiatry. 2024;58(8):636-640. doi:10.1177/00048674241253944
11. Rubinow DR, Schmidt PJ. Gonadal steroid regulation of mood: the lessons of premenstrual syndrome. Front Neuroendocrinol. 2006;27(2):210-216. doi:10.1016/j.yfrne.2006.02.003
12. Schmidt PJ, Ben Dor R, Martinez PE, et al. Effects of Estradiol Withdrawal on Mood in Women With Past Perimenopausal Depression: A Randomized Clinical Trial. JAMA Psychiatry. 2015;72(7):714-726. doi:10.1001/jamapsychiatry.2015.0111
13. Gordon JL, Rubinow DR, Eisenlohr-Moul TA, Leserman J, Girdler SS. Estradiol variability, stressful life events, and the emergence of depressive symptomatology during the menopausal transition. Menopause. 2016;23(3):257-266. doi:10.1097/GME.0000000000000528
14. Miller VM, Kling JM, Files JA, et al. What’s in a name: are menopausal “hot flashes” a symptom of menopause or a manifestation of neurovascular dysregulation?. Menopause. 2018;25(6):700-703. doi:10.1097/GME.0000000000001065
15. Thurston RC, Joffe H. Vasomotor symptoms and menopause: findings from the Study of Women’s Health across the Nation. Obstet Gynecol Clin North Am. 2011;38(3):489-501. doi:10.1016/j.ogc.2011.05.006
16. Greendale GA, Derby CA, Maki PM. Perimenopause and cognition. Obstet Gynecol Clin North Am. 2011;38(3):519-535. doi:10.1016/j.ogc.2011.05.007
17. Russell JK, Jones CK, Newhouse PA. The Role of Estrogen in Brain and Cognitive Aging. Neurotherapeutics. 2019;16(3):649-665. doi:10.1007/s13311-019-00766-9
18. Coelingh Bennink HJT, Gosden R, Stanczyk FZ, Adashi EY. The rediscovery of estetrol and its implications for estrogen treatment. Menopause. 2025;32(7):648-651. Published 2025 Jul 1. doi:10.1097/GME.0000000000002537
19. Panay N, Simoncini T, Taziaux M, et al. Estetrol for the treatment of moderate to severe vasomotor symptoms in postmenopausal women: The design of the E4COMFORT I and II trials. Maturitas. 2026;204:108781. doi:10.1016/j.maturitas.2025.108781
20. Avis NE, Crawford SL, Greendale G, et al. Duration of menopausal vasomotor symptoms over the menopause transition. JAMA Intern Med. 2015;175(4):531-539. doi:10.1001/jamainternmed.2014.8063
21. Canonico M, Plu-Bureau G, Lowe GD, Scarabin PY. Hormone replacement therapy and risk of venous thromboembolism in postmenopausal women: systematic review and meta-analysis. BMJ. 2008;336(7655):1227-1231. doi:10.1136/bmj.39555.441944.BE
22. Vinogradova Y, Coupland C, Hippisley-Cox J. Use of hormone replacement therapy and risk of venous thromboembolism: nested case-control studies using the QResearch and CPRD databases. BMJ. 2019;364:k4810. Published 2019 Jan 9. doi:10.1136/bmj.k4810
23. Scarabin PY. Progestogens and venous thromboembolism in menopausal women: an updated oral versus transdermal estrogen meta-analysis. Climacteric. 2018;21(4):341-345. doi:10.1080/13697137.2018.1446931
24. Rossouw JE, Anderson GL, Prentice RL, et al. Risks and benefits of estrogen plus progestin in healthy postmenopausal women: principal results From the Women’s Health Initiative randomized controlled trial. JAMA. 2002;288(3):321-333. doi:10.1001/jama.288.3.321
25. Chlebowski RT, Rohan TE, Manson JE, et al. Breast Cancer After Use of Estrogen Plus Progestin and Estrogen Alone: Analyses of Data From 2 Women’s Health Initiative Randomized Clinical Trials. JAMA Oncol. 2015;1(3):296-305. doi:10.1001/jamaoncol.2015.0494
26. Davis SR, Baber R, Panay N, et al. Global Consensus Position Statement on the Use of Testosterone Therapy for Women. J Clin Endocrinol Metab. 2019;104(10):4660-4666. doi:10.1210/jc.2019-01603
27. Glaser R, Dimitrakakis C. Testosterone therapy in women: myths and misconceptions. Maturitas. 2013;74(3):230-234. doi:10.1016/j.maturitas.2013.01.003
28. Schoenaker DA, Jackson CA, Rowlands JV, Mishra GD. Socioeconomic position, lifestyle factors and age at natural menopause: a systematic review and meta-analyses of studies across six continents. Int J Epidemiol. 2014;43(5):1542-1562. doi:10.1093/ije/dyu094
29. RAND Corporation. The Economic Impacts of Menopause in the United States. 2022. https://www.rand.org/content/dam/rand/pubs/research_reports/RRA4200/RRA4292-1/RAND_RRA4292-1.pdf
30. Brown SL, Lin IF. The gray divorce revolution: rising divorce among middle-aged and older adults, 1990-2010. J Gerontol B Psychol Sci Soc Sci. 2012;67(6):731-741. doi:10.1093/geronb/gbs089