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Zhang X, Meng Y, Jiang M, Yang L, Zhang K, Lian C, Li Z. Machine learning-based evaluation of application value of pulse wave parameter model in the diagnosis of hypertensive disorder in pregnancy. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2023; 20:8308-8319. [PMID: 37161199 DOI: 10.3934/mbe.2023363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Hypertensive disorder in pregnancy (HDP) remains a major health burden, and it is associated with systemic cardiovascular adaptation. The pulse wave is an important basis for evaluating the status of the human cardiovascular system. This research aims to evaluate the application value of pulse waves in the diagnosis of hypertensive disorder in pregnancy.This research a retrospective study of pregnant women who attended prenatal care and labored at Beijing Haidian District Maternal and Child Health Hospital. We extracted maternal hemodynamic factors and measured the pulse wave of the pregnant women. We developed an HDP predictive model by using support vector machine algorithms at five-gestational-week stages.At five-gestational-week stages, the area under the receiver operating characteristic curve (AUC) of the predictive model with pulse wave parameters was higher than that of the predictive model with hemodynamic factors. The AUC values of the predictive model with pulse wave parameters were 0.77 (95% CI 0.64 to 0.9), 0.83 (95% CI 0.77 to 0.9), 0.85 (95% CI 0.81 to 0.9), 0.93 (95% CI 0.9 to 0.96) and 0.88 (95% CI 0.8 to 0.95) at five-gestational-week stages, respectively. Compared to the predictive models with hemodynamic factors, the predictive model with pulse wave parameters had better prediction effects on HDP.Pulse waves had good predictive effects for HDP and provided appropriate guidance and a basis for non-invasive detection of HDP.
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Affiliation(s)
- Xinyu Zhang
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China
| | - Yu Meng
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China
| | - Mei Jiang
- College of Intelligence and Information Engineering, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Lin Yang
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China
| | - Kuixing Zhang
- College of Intelligence and Information Engineering, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Cuiting Lian
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China
| | - Ziwei Li
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China
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Zhang X, Xu Q, Yang L, Sun G, Liu G, Lian C, Li Z, Hao D, Yang Y, Li X. Dynamic risk prediction models for different subtypes of hypertensive disorders in pregnancy. Front Surg 2022; 9:1005974. [DOI: 10.3389/fsurg.2022.1005974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/04/2022] [Indexed: 11/05/2022] Open
Abstract
BackgroundHypertensive disorders in pregnancy (HDP) are diseases that coexist with pregnancy and hypertension. The pathogenesis of this disease is complex, and different physiological and pathological states can develop different subtypes of HDP.ObjectiveTo investigate the predictive effects of different variable selection and modeling methods on four HDP subtypes: gestational hypertension, early-onset preeclampsia, late-onset preeclampsia, and chronic hypertension complicated with preeclampsia.MethodsThis research was a retrospective study of pregnant women who attended antenatal care and labored at Beijing Maternity Hospital, Beijing Haidian District Maternal and Child Health Hospital, and Peking University People's Hospital. We extracted maternal demographic data and clinical characteristics for risk factor analysis and included gestational week as a parameter in this study. Finally, we developed a dynamic prediction model for HDP subtypes by nonlinear regression, support vector machine, stepwise regression, and Lasso regression methods.ResultsThe AUCs of the Lasso regression dynamic prediction model for each subtype were 0.910, 0.962, 0.859, and 0.955, respectively. The AUC of the Lasso regression dynamic prediction model was higher than those of the other three prediction models. The accuracy of the Lasso regression dynamic prediction model was above 85%, and the highest was close to 92%. For the four subgroups, the Lasso regression dynamic prediction model had the best comprehensive performance in clinical application. The placental growth factor was tested significant (P < 0.05) only in the stepwise regression dynamic prediction model for early-onset preeclampsia.ConclusionThe Lasso regression dynamic prediction model could accurately predict the risk of four HDP subtypes, which provided the appropriate guidance and basis for targeted prevention of adverse outcomes and improved clinical care.
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van Ochten M, Westerhof BE, Spaanderman MEA, Antonius TAJ, van Drongelen J. Modeling renal autoregulation in a hemodynamic, first-trimester gestational model. Physiol Rep 2022; 10:e15484. [PMID: 36200318 PMCID: PMC9535437 DOI: 10.14814/phy2.15484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 11/06/2022] Open
Abstract
The maternal cardiovascular system, led by renal volume regulatory responses, changes during pregnancy to ensure an adequate circulation for fetal development and growth. Circulatory maladjustment predisposes to hypertensive complications during pregnancy. Mathematical models can be used to gain insight in the gestational cardiovascular physiology. In this study, we developed an accurate, robust, and transparent model for renal autoregulation implemented in an existing circulatory gestational model. This renal autoregulation model aims to maintain steady glomerular pressure by the myogenic response, and glomerular filtration rate by tubuloglomerular feedback, both by inducing a change in the radius, and thus resistance, of the afferent arteriole. The modeled response of renal blood flow and the afferent arteriole following blood pressure increase were compared to published observations in rats. With solely the myogenic response, our model had a maximum deviation of 7% in change in renal blood flow and 7% in renal vascular resistance. When both the myogenic response and tubuloglomerular feedback were concurrently activated, the maximum deviation was 7% in change in renal blood flow and 5% in renal vascular resistance. These results show that our model is able to represent renal autoregulatory behavior comparable to empirical data. Further studies should focus on extending the model with other regulatory mechanisms to understand the hemodynamic changes in healthy and complicated pregnancy.
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Affiliation(s)
- Maaike van Ochten
- Department of Gynecology and ObstetricsRadboud University Medical CenterNijmegenThe Netherlands
- Department of Gynecology and ObstetricsMaastricht University Medical CenterMaastrichtThe Netherlands
- Division of Neonatology, Department of PerinatologyRadboud University Medical Center, Radboud Institute for Health Sciences, Amalia Children's HospitalNijmegenThe Netherlands
| | - Berend E. Westerhof
- Division of Neonatology, Department of PerinatologyRadboud University Medical Center, Radboud Institute for Health Sciences, Amalia Children's HospitalNijmegenThe Netherlands
- Department of Pulmonary MedicineAmsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular SciencesAmsterdamThe Netherlands
| | - Marc E. A. Spaanderman
- Department of Gynecology and ObstetricsRadboud University Medical CenterNijmegenThe Netherlands
- Department of Gynecology and ObstetricsMaastricht University Medical CenterMaastrichtThe Netherlands
| | - Tim A. J. Antonius
- Division of Neonatology, Department of PerinatologyRadboud University Medical Center, Radboud Institute for Health Sciences, Amalia Children's HospitalNijmegenThe Netherlands
| | - Joris van Drongelen
- Department of Gynecology and ObstetricsRadboud University Medical CenterNijmegenThe Netherlands
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Gosselink ME, van Buren MC, Kooiman J, Groen H, Ganzevoort W, van Hamersvelt HW, van der Heijden OWH, van de Wetering J, Lely AT. A nationwide Dutch cohort study shows relatively good pregnancy outcomes after kidney transplantation and finds risk factors for adverse outcomes. Kidney Int 2022; 102:866-875. [PMID: 35777440 DOI: 10.1016/j.kint.2022.06.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/04/2022] [Accepted: 06/03/2022] [Indexed: 12/14/2022]
Abstract
Although numbers of pregnancy after kidney transplantation (KT) are rising, high risks of adverse pregnancy outcomes (APO) remain. Though important for pre-conception counselling and pregnancy monitoring, analyses of pregnancy outcomes after KT per pre-pregnancy estimated glomerular filtration rate-chronic kidney disease (eGFR-CKD)-categories have not been performed on a large scale before. To do this, we conducted a Dutch nationwide cohort study of consecutive singleton pregnancies over 20 weeks of gestation after KT. Outcomes were analyzed per pre-pregnancy eGFR-CKD category and a composite APO (cAPO) was established including birth weight under 2500 gram, preterm birth under 37 weeks, third trimester severe hypertension (systolic blood pressure over 160 and/or diastolic blood pressure over 110 mm Hg) and/or over 15% increase in serum creatinine during pregnancy. Risk factors for cAPO were analyzed in a multilevel model after multiple imputation of missing predictor values. In total, 288 pregnancies in 192 women were included. Total live birth was 93%, mean gestational age 35.6 weeks and mean birth weight 2383 gram. Independent risk factors for cAPO were pre-pregnancy eGFR, midterm percentage serum creatinine dip and midterm mean arterial pressure dip; odds ratio 0.98 (95% confidence interval 0.96-0.99), 0.95 (0.93-0.98) and 0.94 (0.90-0.98), respectively. The cAPO was a risk indicator for graft loss (hazard ratio 2.55, 1.09-5.96) but no significant risk factor on its own when considering pre-pregnancy eGFR (2.18, 0.92-5.13). This was the largest and most comprehensive study of pregnancy outcomes after KT, including pregnancies in women with poor kidney function, to facilitate individualized pre-pregnancy counselling based on pre-pregnancy graft function. Overall obstetric outcomes are good. The risk of adverse outcomes is mainly dependent on pre-pregnancy graft function and hemodynamic adaptation to pregnancy.
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Affiliation(s)
- Margriet E Gosselink
- Department of Obstetrics and Gynaecology, Wilhelmina Children's Hospital Birth Centre, University Medical Centre Utrecht, Utrecht, the Netherlands.
| | - Marleen C van Buren
- Department of Internal Medicine, Erasmus MC Transplant Institute, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Judith Kooiman
- Department of Obstetrics and Gynaecology, Wilhelmina Children's Hospital Birth Centre, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Henk Groen
- Department of Epidemiology, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
| | - Wessel Ganzevoort
- Department of Obstetrics and Gynaecology, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, the Netherlands
| | - Henk W van Hamersvelt
- Department of Nephrology, Radboud University Medical Centre, Nijmegen, the Netherlands
| | | | - Jacqueline van de Wetering
- Department of Internal Medicine, Erasmus MC Transplant Institute, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - A Titia Lely
- Department of Obstetrics and Gynaecology, Wilhelmina Children's Hospital Birth Centre, University Medical Centre Utrecht, Utrecht, the Netherlands
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van Buren MC, Gosselink M, Groen H, van Hamersvelt H, de Jong M, de Borst MH, Zietse R, van de Wetering J, Lely AT. Effect of Pregnancy on eGFR After Kidney Transplantation: A National Cohort Study. Transplantation 2022; 106:1262-1270. [PMID: 34456267 PMCID: PMC9128619 DOI: 10.1097/tp.0000000000003932] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 06/03/2021] [Accepted: 06/15/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The effect of pregnancy on the course of estimated glomerular filtration rate (eGFR) is unknown in kidney transplant recipients (KTRs). METHODS We conducted a nationwide multicenter cohort study in KTRs with pregnancy (>20 wk) after kidney transplantation (KT). Annual eGFRs after KT until death or graft loss and additional eGFRs before each pregnancy were collected according to protocol. Changes in eGFR slope before and after each pregnancy were analyzed by generalized estimating equations multilevel analysis adjusted for transplant vintage. RESULTS We included 3194 eGFR measurements before and after pregnancy in 109 (55%) KTRs with 1, 78 (40%) with 2, and 10 (5%) with 3 pregnancies after KT. Median follow-up after first delivery post-KT was 14 y (interquartile range, 18 y). Adjusted mean eGFR prepregnancy was 59 mL/min/1.73 m2 (SEM [standard error of the mean] 1.72; 95% confidence interval [CI], 56-63), after the first pregnancy 56 mL/min/1.73 m2 (SEM 1.70; 95% CI, 53-60), after the second pregnancy 56 mL/min/1.73 m2 (SEM 2.19; 95% CI, 51-60), and after the third pregnancy 55 mL/min/1.73 m2 (SEM 8.63; 95% CI, 38-72). Overall eGFR slope after the first, second, and third pregnancies was not significantly worse than prepregnancy (P = 0.28). However, adjusted mean eGFR after the first pregnancy was 2.8 mL/min/1.73 m2 (P = 0.08) lower than prepregnancy. CONCLUSIONS The first pregnancy has a small, but insignificant, effect on eGFR slope in KTRs. Midterm hyperfiltration, a marker for renal reserve capacity, was associated with better eGFR and death-censored graft survival. In this KTR cohort with long-term follow-up, no significant effect of pregnancy on kidney function was detected.
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Affiliation(s)
- Marleen C. van Buren
- Erasmus MC Transplant Institute, Department of Internal Medicine, University Medical Center, Rotterdam, The Netherlands
| | - Margriet Gosselink
- Department of Obstetrics, Wilhelmina Children’s Hospital Birth Center, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Henk Groen
- Department of Epidemiology, University of Groningen, Groningen, The Netherlands
| | - Henk van Hamersvelt
- Department of Nephrology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Margriet de Jong
- Department of Nephrology, University Medical Center Groningen, Groningen, The Netherlands
| | - Martin H. de Borst
- Department of Nephrology, University Medical Center Groningen, Groningen, The Netherlands
| | - Robert Zietse
- Erasmus MC Transplant Institute, Department of Internal Medicine, University Medical Center, Rotterdam, The Netherlands
| | - Jacqueline van de Wetering
- Erasmus MC Transplant Institute, Department of Internal Medicine, University Medical Center, Rotterdam, The Netherlands
| | - A. Titia Lely
- Department of Obstetrics, Wilhelmina Children’s Hospital Birth Center, University Medical Center Utrecht, Utrecht, The Netherlands
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Nascimento RA, Possomato-Vieira JS, Bonacio GF, Rizzi E, Dias-Junior CA. Reductions of Circulating Nitric Oxide are Followed by Hypertension during Pregnancy and Increased Activity of Matrix Metalloproteinases-2 and -9 in Rats. Cells 2019; 8:cells8111402. [PMID: 31703340 PMCID: PMC6912623 DOI: 10.3390/cells8111402] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/03/2019] [Indexed: 12/14/2022] Open
Abstract
Hypertensive pregnancy has been associated with reduced nitric oxide (NO), bioavailability, and increased activity of matrix metalloproteinases (MMPs). However, it is unclear if MMPs activation is regulated by NO during pregnancy. To this end, we examined activity of MMP-2 and MMP-9 in plasma, placenta, uterus and aorta, NO bioavailability, oxidative stress, systolic blood pressure (SBP), and fetal-placental development at the early, middle, and late pregnancy stages in normotensive and Nω-Nitro-L-arginine methyl-ester (L-NAME)-induced hypertensive pregnancy in rats. Reduced MMP-2 activity in uterus, placenta, and aorta and reduced MMP-9 activity in plasma and placenta with concomitant increased NO levels were found in normotensive pregnant rats. By contrast, increased MMP-2 activity in uterus, placenta, and aorta, and increased MMP-9 activity in plasma and placenta with concomitant reduced NO levels were observed in hypertensive pregnant rats. Also, elevated oxidative stress was displayed by hypertensive pregnant rats at the middle and late stages. These findings in the L-NAME-treated pregnant rats were also followed by increases in SBP and associated with fetal growth restrictions at the middle and late pregnancy stages. We concluded that NO bioavailability may regulate MMPs activation during normal and hypertensive pregnancy.
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Affiliation(s)
- Regina A. Nascimento
- Department of Pharmacology, Biosciences Institute of Botucatu, Sao Paulo State University – UNESP, Botucatu, Sao Paulo 18.618-689, Brazil; (R.A.N.); (J.S.P.-V.)
| | - Jose S. Possomato-Vieira
- Department of Pharmacology, Biosciences Institute of Botucatu, Sao Paulo State University – UNESP, Botucatu, Sao Paulo 18.618-689, Brazil; (R.A.N.); (J.S.P.-V.)
| | - Giselle F. Bonacio
- Unit of Biotechnology, University of Ribeirao Preto, UNAERP, Ribeirao Preto, Sao Paulo 14096-900, Brazil; (G.F.B.); (E.R.)
| | - Elen Rizzi
- Unit of Biotechnology, University of Ribeirao Preto, UNAERP, Ribeirao Preto, Sao Paulo 14096-900, Brazil; (G.F.B.); (E.R.)
| | - Carlos A. Dias-Junior
- Department of Pharmacology, Biosciences Institute of Botucatu, Sao Paulo State University – UNESP, Botucatu, Sao Paulo 18.618-689, Brazil; (R.A.N.); (J.S.P.-V.)
- Correspondence: ; Tel.: +55 14 3880-0214
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Maternal Venous Hemodynamic Dysfunction in Proteinuric Gestational Hypertension: Evidence and Implications. J Clin Med 2019; 8:jcm8030335. [PMID: 30862007 PMCID: PMC6462953 DOI: 10.3390/jcm8030335] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/26/2019] [Accepted: 03/05/2019] [Indexed: 01/21/2023] Open
Abstract
This review summarizes current knowledge from experimental and clinical studies on renal function and venous hemodynamics in normal pregnancy, in gestational hypertension (GH) and in two types of preeclampsia: placental or early-onset preeclampsia (EPE) and maternal or late-onset (LPE) preeclampsia, presenting at <34 weeks and ≥34 weeks respectively. In addition, data from maternal venous Doppler studies are summarized, showing evidence for (1) the maternal circulation functioning closer to the upper limits of capacitance than in non-pregnant conditions, with intrinsic risks for volume overload, (2) abnormal venous Doppler measurements obtainable in preeclampsia, more pronounced in EPE than LPE, however not observed in GH, and (3) abnormal venous hemodynamic function installing gradually from first to third trimester within unique pathways of general circulatory deterioration in GH, EPE and LPE. These associations have important clinical implications in terms of screening, diagnosis, prevention and management of gestational hypertensive diseases. They invite for further hypothesis-driven research on the role of retrograde venous congestion in the etiology of preeclampsia-related organ dysfunctions and their absence in GH, and also challenge the generally accepted view of abnormal placentation as the primary cause of preeclampsia. The striking similarity between abnormal maternal venous Doppler flow patterns and those observed at the ductus venosus and other abdominal veins of the intra-uterine growth restricted fetus, also invites to explore the role of venous congestion in the intra-uterine programming of some adult diseases.
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Reply. Am J Obstet Gynecol 2018; 219:627-628. [PMID: 30086294 DOI: 10.1016/j.ajog.2018.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 07/30/2018] [Indexed: 11/20/2022]
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Gyselaers W, Spaanderman M. Assessment of venous hemodynamics and volume homeostasis during pregnancy: recommendations of the International Working Group on Maternal Hemodynamics. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2018; 52:174-185. [PMID: 29120514 DOI: 10.1002/uog.18952] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/21/2017] [Accepted: 10/30/2017] [Indexed: 06/07/2023]
Abstract
Venous hemodynamics and volume homeostasis are important aspects of cardiovascular physiology. However, today their relevance is still very much underappreciated. Their most important role is maintenance and control of venous return and, as such, cardiac output. A high-flow/low-resistance circulation, remaining constant under physiological circumstances, is mandatory for an uncomplicated course of pregnancy. In this article, characteristics of normal and abnormal venous and volume regulating functions are discussed with respect to normal and pathologic outcomes of pregnancy, and current (non-invasive) methods to assess these functions are summarized. Copyright © 2017 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- W Gyselaers
- Department of Obstetrics and Gynecology, Ziekenhuis Oost Limburg, Genk, Belgium
- Department of Physiology, Hasselt University, Diepenbeek, Belgium
| | - M Spaanderman
- Department of Obstetrics and Gynecology, Maastricht University Medical Centre, Maastricht, The Netherlands
- GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
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Foo FL, Mahendru AA, Masini G, Fraser A, Cacciatore S, MacIntyre DA, McEniery CM, Wilkinson IB, Bennett PR, Lees CC. Association Between Prepregnancy Cardiovascular Function and Subsequent Preeclampsia or Fetal Growth Restriction. Hypertension 2018; 72:442-450. [PMID: 29967040 DOI: 10.1161/hypertensionaha.118.11092] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 04/23/2018] [Accepted: 06/04/2018] [Indexed: 12/14/2022]
Abstract
Preeclampsia and fetal growth restriction during pregnancy are associated with increased risk of maternal cardiovascular disease later in life. It is unclear whether this association is causal or driven by similar antecedent risk factors. Clarification requires recruitment before conception which is methodologically difficult with high attrition rates and loss of outcome numbers to nonconception/miscarriage. Few prospective studies have, therefore, been adequately powered to address these questions. We recruited 530 healthy women (mean age: 35.0 years) intending to conceive and assessed cardiac output, cardiac index, stroke volume, total peripheral resistance, mean arterial pressure, and heart rate before pregnancy. Participants were followed to completion of subsequent pregnancy with repeat longitudinal assessments. Of 356 spontaneously conceived pregnancies, 15 (4.2%) were affected by preeclampsia and fetal growth restriction. Women who subsequently developed preeclampsia/fetal growth restriction had lower preconception cardiac output (4.9 versus 5.8 L/min; P=0.002) and cardiac index (2.9 versus 3.3 L/min per meter2; P=0.031) while mean arterial pressure (87.1 versus 82.3 mm Hg; P=0.05) and total peripheral resistance (1396.4 versus 1156.1 dynes sec cm-5; P<0.001) were higher. Longitudinal trajectories for cardiac output and total peripheral resistance were similar between affected and healthy pregnancies, but the former group showed a more exaggerated fall in mean arterial pressure in the first trimester, followed by a steeper rise and a steeper fall to postpartum values. Significant relationships were observed between cardiac output, total peripheral resistance, and mean arterial pressure and gestational epoch. We conclude that in healthy women, an altered prepregnancy hemodynamic phenotype is associated with the subsequent development of preeclampsia/fetal growth restriction.
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Affiliation(s)
- Fung L Foo
- From the Institute for Reproductive and Developmental Biology, Imperial College, London, United Kingdom (F.L.F., G.M., S.C., D.A.M., P.R.B., C.C.L.)
| | - Amita A Mahendru
- Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (A.M.M., C.M.M., I.B.W.)
| | - Giulia Masini
- From the Institute for Reproductive and Developmental Biology, Imperial College, London, United Kingdom (F.L.F., G.M., S.C., D.A.M., P.R.B., C.C.L.)
| | - Abigail Fraser
- Population Health Sciences, Bristol Medical School (A.F.).,MRC Integrative Epidemiology Unit (A.F.)
| | - Stefano Cacciatore
- From the Institute for Reproductive and Developmental Biology, Imperial College, London, United Kingdom (F.L.F., G.M., S.C., D.A.M., P.R.B., C.C.L.).,University of Bristol, United Kingdom; and International Centre for Genetic Engineering and Biotechnology, Cancer Genomics Group, Cape Town, South Africa (S.C.)
| | - David A MacIntyre
- From the Institute for Reproductive and Developmental Biology, Imperial College, London, United Kingdom (F.L.F., G.M., S.C., D.A.M., P.R.B., C.C.L.)
| | - Carmel M McEniery
- Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (A.M.M., C.M.M., I.B.W.)
| | - Ian B Wilkinson
- Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (A.M.M., C.M.M., I.B.W.)
| | - Phillip R Bennett
- From the Institute for Reproductive and Developmental Biology, Imperial College, London, United Kingdom (F.L.F., G.M., S.C., D.A.M., P.R.B., C.C.L.)
| | - Christoph C Lees
- From the Institute for Reproductive and Developmental Biology, Imperial College, London, United Kingdom (F.L.F., G.M., S.C., D.A.M., P.R.B., C.C.L.)
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Reid RA, Prickett TCR, Pullar BE, Darlow BA, Gullam JE, Espiner EA. C-type natriuretic peptide in complicated pregnancy: increased secretion precedes adverse events. J Clin Endocrinol Metab 2014; 99:1470-8. [PMID: 24446655 DOI: 10.1210/jc.2013-3758] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
CONTEXT C-type natriuretic peptide (CNP), a vasoactive product of the endothelium, is markedly increased during placentation in ovine pregnancy and is further stimulated by nutrient restriction. Whether CNP products change in human pregnancy is unknown. OBJECTIVES The objective of the study was to compare serial changes in maternal plasma CNP peptides during normal pregnancy with changes in pregnancy complicated by adverse events and relate these to fetal growth and placental CNP content. DESIGN This was a prospective observational study undertaken in a tertiary care center. METHODS We studied changes in maternal plasma aminoterminal proCNP (NTproCNP) and CNP at monthly intervals, fetal growth, and placental and umbilical plasma CNP peptides in 51 women, 28 of whom experienced an adverse event and 23 were uneventful. Age matched healthy nonpregnant women served as a reference range for NTproCNP. RESULTS Compared with nonpregnant women, maternal plasma NTproCNP in an uneventful pregnancy was significantly reduced from first sampling (16 wk gestation) until 36 weeks. In contrast, in complicated pregnancy, levels did not decline and were significantly higher (P < .001 by ANOVA) than in normal pregnancy from 20 weeks. Highest values occurred in women later developing hypertension and fetal growth disorders. Placental concentration of NTproCNP was unrelated to maternal NTproCNP but strongly correlated with cord plasma levels. CONCLUSIONS Maternal NTproCNP is significantly raised in women who later exhibit a range of obstetric adverse events. Lack of association with placental concentrations suggests that these changes represent an adaptive response within the maternal circulation to a threatened nutrient supply to the fetus.
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Affiliation(s)
- Rosemary A Reid
- Departments of Obstetrics and Gynaecology (R.A.R., B.E.P., J.E.G.), Medicine (T.C.R.P., E.A.E.), and Paediatrics (B.A.D.), University of Otago, Christchurch 8140, New Zealand
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