Biomedical subjects

Babill Stray-Pedersen

Publications and source records attributed to Babill Stray-Pedersen.

30 records · Page 2Linked to original sources

PubMed2002

Interleukin-10 reverses acute detrimental effects of endotoxin-induced inflammation on perinatal cerebral hypoxia-ischemia.

UNLABELLED: Perinatal brain injuries and the subsequent development of cerebral palsy are closely associated with intrauterine infections and inflammatory response. Antibiotics have proven futile in reducing perinatal brain injuries. We tested whether treatment with the anti-inflammatory cytokine IL-10 could have beneficial effects during a concomitant endotoxin and cerebral hypoxic-ischemic challenge. Thirty-three newborn piglets were randomized to pretreatment with: CONTROLS: placebo, Endotoxin: 2 kU/kg bolus and infusion of 1 kU/kg per h of endotoxin, or Endotoxin+IL-10: endotoxin in addition to 50 microg/kg of porcine recombinant IL-10. We induced cerebral hypoxia-ischemia by bilateral clamping of the common carotid arteries and ventilation with 8% oxygen for 20 min followed by 3 h of reoxygenation/reperfusion. Extracellular lactate, pyruvate, glycerol and glutamate, microcirculation and tissue oxygenation were monitored in the striatum by microdialysis, laser Doppler flow and oxygen tension probe, respectively. During and/or after cerebral hypoxia-ischemia, Endotoxin caused marked deterioration of the cerebral metabolic situation with higher lactate/pyruvate ratio (P=0.003), compared to CONTROLS and Endotoxin+IL-10. This was caused mainly by very low levels of pyruvate (P=0.001). During the following reoxygenation, Endotoxin compromised cerebral microcirculation (P=0.038) and tissue oxygenation (P=0.012) compared to CONTROLS and Endotoxin+IL-10. After a period of remission, a secondary energy failure and a new rise in the lactate/pyruvate ratio was seen in Endotoxin (P=0.002), but not in CONTROLS or Endotoxin+IL-10. At the end of observation, only the Endotoxin+IL-10 group had regained their baseline values in all variables. Thus IL-10 counteracts acute effects of endotoxin on cerebral metabolism, microcirculation and oxygen tension during hypoxia-ischemia in the perinatal brain.

Animals↗

PubMed2002

Perinatal complications among ethnic Somalis in Norway.

BACKGROUND: The majority of ethnic Somali women in Norway have undergone an elaborate form of circumcision (infibulation). The aim of this study was to examine the risk of perinatal complications among ethnic Somalis and to discuss its relation to circumcision. METHODS: We conducted a cross-sectional population-based registry study. Data on all births to women born in Somalia (1733) and Norway (702 192) from 1986 to 1998 was provided from the Medical Birth Registry of Norway. We analyzed the risk of perinatal complications among women of Somali origin vs. ethnic Norwegians using univariate and multivariate methods. RESULTS: Perinatal complications were more frequent among women of Somali origin than among ethnic Norwegians. These included induction of labor, fetal distress, secondary arrest, prolonged second stage of labor, operative delivery and perinatal death. Particularly elevated odds ratios were found for fetal distress (odds ratio=2.6, 95% confidence interval (CI); 2.2-3.0), emergency cesarean sections (odds ratio=3.0, 95% confidence interval 2.6-3.4), Apgar scores below seven (odds ratio = 3.1, 95% confidence interval 2.4-4.0) and prelabor fetal deaths (odds ratio=2.5, 95% confidence interval 1.7-3.7). CONCLUSION: Similar findings in infibulated vs. noncircumcised women have been demonstrated previously in other studies indicating that circumcision could play a role. The current study is the first to be conducted among Somali women in Europe. However, the results are not informative on whether the adverse birth outcomes are caused by infibulation as such or in combination with suboptimal perinatal care, intercurrent diseases and sociocultural factors. Somali women represent a high-risk group in obstetrics, calling for special attention and care.

Adult↗

PubMed2002

Reproductive tract infections and the risk of HIV among women in Moshi, Tanzania.

OBJECTIVES: The objectives of the study were to determine the prevalence of HIV and reproductive tract infections (RTIs); to compare the occurrence of RTIs among HIV-infected and non-infected women; and to assess the association of HIV with RTIs and behavioral factors among women aged 15-49 years. METHODS: A cross-sectional study was conducted in late 1999 among 382 consenting women attending three primary healthcare clinics. They were interviewed and screened for HIV-1 and RTIs. RESULTS: The prevalence of HIV-1 was 11.5%. Sixty-four percent of the women had one ongoing treatable RTI. Endogenous and sexually transmitted RTIs were higher in HIV-positive than negative women and 84% of the HIV seropositive women were co-infected with one treatable RTI. HIV was significantly associated with cervicitis (chlamydial or gonococcal) [OR = 3.2 (CI 1.1-13.2)], HSV-2 [OR = 2.6 (CI 1.3-5.1)], bacterial vaginosis [OR = 1.9 (CI 1.1-4.1)], genital warts [OR = 4.8 (CI 1.1-22.2)], and presence of vaginal discharge [OR = 2.7 (CI 1.3-5.2)]. Having more than one lifetime sexual partner, a history of infant mortality or a partner who had other wives or resided away from home > 6 months, were risk factors for HIV infection. CONCLUSION: HIV-1 and RTIs are a major public health problem among women in this population. Integration of routine screening and treatment of RTIs in the reproductive health clinics will be an important strategy to combat HIV in the area. Further, innovative behavior interventions targeting both men and women, preferably as couples are needed.

Adolescent↗

PubMed2002

Female genital cutting in Kilimanjaro, Tanzania: changing attitudes?

OBJECTIVES: To study the prevalence, type, social correlates and attitudes towards female genital cutting (FGC) among urban women in Kilimanjaro, Tanzania; and to examine the association between FGC and gynaecological problems, reproductive tract infections (RTIs) and HIV. METHODS: In 1999, 379 women attending reproductive health care clinics were interviewed and underwent pelvic examination. Specimens for RTI/HIV diagnosis were taken. RESULTS: Seventeen per cent had undergone FGC, mostly clitoridectomy (97%). Female genital cutting prevalence was significantly lower among educated, Christian and Chagga women. Women aged >or=35 were twice as likely to be cut as those < 25 years. Seventy-six per cent of those who had undergone FGC intend not to perform the procedure on their daughters. Age < 25 years (P < 0.0001) and low parity (P < 0.01) were predictors of that intention. There was no association between RTIs, HIV or hepatitis B and FGC. CONCLUSION: FGC is still fairly common but there is evidence of a change of attitude towards the practice, especially among young women. The opportunity to educate women who attend reproductive health care facilities on FGC should be taken.

Adolescent↗

PubMed2002

The heavier the better? Birthweight and perinatal mortality in different ethnic groups.

BACKGROUND: Mother's ethnicity is associated with her baby's birthweight and risk of perinatal mortality. Given the close relation between birthweight and perinatal mortality, we explored whether ethnic differences in birthweight explain ethnic differences in perinatal mortality. METHODS: Data on all births to mothers born in Norway (808 658), Pakistan (6854), Vietnam (3283) and North Africa (1461) from 1980 to 1995 were obtained from the Medical Birth Registry of Norway. The associations between birthweight and perinatal mortality among ethnic groups were analysed using univariate and multivariate methods. RESULTS: Mean birthweights were low for Vietnamese and Pakistani mothers (3202 g, 3244 g) and high for Norwegian and North African mothers (3530 g, 3559 g). Mean birthweights were largely unrelated to perinatal mortality, which was lowest for Vietnamese (8.2/1000, 95% CI: 5.1-11.3) and highest for Pakistanis (14.9/1000, 95% CI: 12.0-17.7). Intermediate perinatal mortality rates were found among Norwegians (9.5/1000, 95% CI: 9.3-9.7) and North Africans (9.6/1000, 95% CI: 4.6-14.6). Further comparison of weight-specific mortality rates between the two largest ethnic groups showed the low birthweight paradox, where among low-weight births, perinatal mortality was lower among Pakistani than among Norwegian babies. However, adjustment to a relative birthweight scale (units of standard deviations from population-specific mean value) revealed higher rates of weight-specific mortality among Pakistanis across the entire range of birthweights. Multivariate adjustment for relative birthweight and other factors did not change these results. CONCLUSIONS: Differences in perinatal mortality between the ethnic groups were not explained by differences in mean birthweight. Paradoxical differences in birthweight-specific mortality rates could be resolved by adjustment to a relative scale.

Adult↗

PubMed2002

Herpes simplex virus type-2 infection in pregnancy: no risk of fetal death: results from a nested case-control study within 35,940 women.

OBJECTIVE: The aim of this study was to assess the association of fetal death with herpes simplex virus type-2 (HSV-2) antibody status during pregnancy: 1. presence of antibodies in first trimester; 2. appearance of antibodies (incident infection); 3. increase in antibody titre; and 4. loss of antibodies. DESIGN: Prospective study. POPULATION: The source population was a cohort of 35,940 pregnant women in Norway. METHODS: Nested case-control study within the cohort. Cases were all women in the study population who experienced a fetal death after the 16th weeks of gestation (n = 281), and controls were 961 randomly selected women with a live born child. MAIN OUTCOME MEASURES: HSV-2 antibody status. RESULTS: Twenty-nine percent (82/281) of women with a fetal death and 27% (256/961) of the controls had of HSV-2 antibodies present in the first trimester (odds ratio 1.1, 95% CI 0.8-1.5). HSV-2 antibodies appeared in 2% (3/136) of initially seronegative cases and 3% (16/623) of the controls during pregnancy (odds ratio 0.9, 95% CI 0.2-3.0). An increase in HSV-2 antibodies occurred in 4% (2/55) of initially seropositive cases and 7% (16/231) of the controls (odds ratio 0.5, 95% CI 0.1-2.3). Loss of HSV-2 antibodies in initially seropositive women was not associated with fetal death, 42% (23/55) of the cases and 45% (104/231) of the controls seroreverted (odds ratio 0.8, 95% CI 0.5-1.6). Differences in follow up time, age and parity were controlled and did not influence the comparisons between cases and controls. CONCLUSION: This study provides no evidence of an association between HSV-2 infection during pregnancy and fetal death.

Adult↗

PubMed2002

Prolonged apneas and hypoxia mediated by nicotine and endotoxin in piglets.

OBJECTIVE: Infections and maternal smoking are risk factors for SIDS, and toxins from common bacteria have been proposed as a causative link between infections and SIDS. Nicotine can be transferred in significant amounts postnatally to the infant through environmental tobacco smoke or maternal smoking before nursing. We investigated the acute effects of nicotine and endotoxin on repeated apnea by laryngeal reflex stimulation and the following autoresuscitation. DESIGN: Thirty-four 1-week-old (+/- 1 day) piglets were sedated and randomized to 1 of 4 pretreatment groups: (1) 1 microg endotoxin i.v./kg; (2) 5 microg nicotine i.v./kg; (3) 1 microg endotoxin i.v./kg and 5 microg nicotine i.v./kg, and (4) placebo. Apnea was induced by insufflation of 0.1 ml of acidified saline (pH 2) in the subglottic space of the trachea three times with intervals of 2 min. RESULTS: Pretreatment with endotoxin caused a significant increase in plasma TNF-alpha in the endotoxin groups (mean value +/- SEM 953 +/- 246 and 980 +/- 226 pg/ml, respectively) but no significant change in plasma IL-1 beta. Blood pressure, respiratory rate or S(a)O(2) was not significantly affected before induced apnea. Both pretreatment with nicotine and endotoxin caused prolonged apneas by 35-45%, a complete loss of normal hyperventilation during autoresuscitation, and prolonged hypoxia after apnea. CONCLUSIONS: Nicotine and endotoxin interferes with autoresuscitation after apnea. This experimental model on piglets may shed light over important mechanisms involved in the causation of SIDS.

Animals↗

PubMed2002

Detrimental effects of nicotine and endotoxin in the newborn piglet brain during severe hypoxemia.

Hypoxia-ischemia is a major cause of perinatal brain damage, but evidence shows that brain injury also is associated with intrauterine infections and maternal smoking. The mechanisms are not known, and we therefore explored the effects of experimental inflammation or nicotine on perinatal brain metabolism and injury during severe hypoxemia. Twenty-eight 1-week-old piglets were anesthetized and instrumented with microdialysis probes in the striatum and brainstem. We studied three pretreatment groups: (1) 20 microg/kg i.v. nicotine (n = 9); (2) 1 microg/kg i.v. endotoxin from Escherichia coli (n = 11), or (3) control (n = 8). The piglets were subsequently exposed to 30 min of hypoxemia (6% O(2)). In order to minimize any ischemic component and increase survival, this was abrupted for 1 min if blood pressure fell to 30 mm Hg. During hypoxemia, both the pretreatment with endotoxin and nicotine induced higher levels of extracellular lactate and peak lactate/pyruvate ratio compared with controls (54.7 +/- 9.6 (p < 0.01) and 65.2 +/- 13.1 (p < 0.02) vs. 15.9 +/- 7.4, respectively), reflecting a deterioration of the metabolic status in these groups. The two pretreated groups reached significantly higher peak levels of extracellular glycerol (30.9 +/- 4.1 vs. 77.9 +/- 12.7 and 89.4 +/- 14.2 micromol/l, respectively, p = 0.01), indicating a higher level of cellular membrane disintegration or leakage. In addition, 3 endotoxin piglets and 4 nicotine piglets died during reoxygenation, while all controls survived (p = 0.13 and p < 0.04, respectively). Mortality was associated with a rise in extracellular glutamate at the end of hypoxemia/start reoxygenation (p = 0.02). These findings contribute in explaining how nicotine and inflammatory response to bacterial toxins could act as cofactors for hypoxic-ischemic neurologic injury in the immature brain.

Animals↗

PubMed2002

Prevalence and outcome of pregnancies in Norwegian and Swedish women with cystic fibrosis.

BACKGROUND: As patients with cystic fibrosis now live longer, more women with cystic fibrosis wish to become mothers. We looked at the prevalence and outcome of pregnancies in women with cystic fibrosis who were alive in Norway and Sweden in the year 2000. METHODS: Women with cystic fibrosis aged 18 years and older attending cystic fibrosis centers in Norway and Sweden were included in the study. Information was obtained from medical records, interviews and questionnaires. RESULTS: One hundred and thirty-two women with cystic fibrosis were included. Sixty-one (46%) had considered or were now considering pregnancy. Forty-six (75%) of these 61 women had already conceived. Eighty pregnancies were reported, including 12 (15%) conceived by assisted reproductive techniques. There were eight (10%) induced abortions, 11 (14%) miscarriages, and one extrauterine pregnancy. The remaining 60 (75%) pregnancies resulted in live born infants. CONCLUSIONS: Today women with cystic fibrosis have a better chance of getting pregnant than previously reported. In this study, 75% of those who wanted to get pregnant had succeeded. Fifteen percent of pregnancies were conceived by artificial reproductive techniques. The possibility of motherhood must be considered in these patients. It is important to plan pregnancies with optimal follow up by a cystic fibrosis team.

Abortion, Induced↗

PubMed2002

Maternal and fetal morbidity in pregnancies of Norwegian and Swedish women with cystic fibrosis.

BACKGROUND: The survival of patients with cystic fibrosis has increased. More women with cystic fibrosis reach reproductive age and wish to become pregnant. The aim of this work was to study the outcome of completed pregnancies in women with cystic fibrosis in Norway and Sweden. METHODS: A retrospective audit from medical records was performed for 33 successful pregnancies in 23 women from the cystic fibrosis center in Norway and two cystic fibrosis centers in Sweden. Lung function, body weight and use of antibiotics together with other medical data were related to the complications and outcomes of the pregnancies. RESULTS: The most frequent complication of the pregnancies was preterm delivery, which occurred in 24% of cases. The lung function of the women was significantly lower in the preterm group than in those delivering at term. Those who went on to deliver preterm were more likely to have other cystic fibrosis complications including diabetes, asthma or liver disease. The weight gain of the women with cystic fibrosis delivering preterm was less than in the term group (corrected for gestation), but the frequency of pulmonary infections did not differ. As for the total group, lung function did not deteriorate during pregnancy, even though the need for intravenous antibiotics was doubled compared with the year before and after pregnancy. Weight gain in pregnancy was on average 10.3 kg, and almost half of the women needed supplementary nutrition. Gestational diabetes developed in four of the 23 patients. Caesarean sections were performed in eight of the 33 deliveries (24%), and 26 of the babies (79%) were breast-fed. None of the 33 children suffered from cystic fibrosis. CONCLUSION: Women with cystic fibrosis with mild to moderate disease may safely go through pregnancy. In those with severe disease, preterm delivery is common. A team approach is necessary to provide the best medical care for pregnant women with cystic fibrosis.

Adult↗

PubMed2002

Maternal health in sudden intrauterine unexplained death: do urinary tract infections protect the fetus?

OBJECTIVE: To study the impact of maternal health and obstetric complications on the risk for sudden intrauterine unexplained death. METHODS: All 76 cases of sudden intrauterine unexplained death and 165 explained stillbirths among singletons in Oslo, Norway (1986-1995) were compared with 582 controls. Information on maternal health was registered from antenatal health cards and the Medical Birth Registry of Norway. The effect of pregnancy duration was studied before logistic regression analysis corrected for pregnancy duration was performed. RESULTS: Urinary tract colonization or infection in pregnancy was associated with a reduced risk for subsequent sudden intrauterine unexplained death (odds ratio [OR] 0.29 [0.12-0.74]), whereas insufficient physiologic hemodilution during pregnancy (lowest hemoglobin greater than 13 g/mL) increased the risk for sudden intrauterine unexplained death (OR 9.50 [1.30-69.3]). However, the risk for sudden intrauterine unexplained death remained unaffected by the total number of indicators of impaired maternal health during pregnancy, in contrast to significant impact on other stillbirths. CONCLUSION: Urinary tract colonization or infection may offer protection against sudden intrauterine unexplained death. We hypothesize that the subsequent maternal immune response offers transplacental protection against lethal fetal infections by common pathogens of urinary tract infections. Other health indicators have little impact on sudden intrauterine unexplained death.

Female↗

PubMedDate not supplied

Too late prenatal diagnosis of fetal toxoplasmosis: a case report.

OBJECTIVE: We describe a case of severe fetal hydrocephalus due to toxoplasmosis which could not be diagnosed until late gestational age due to the lack of a serologic surveillance program during pregnancy; moreover, this case points to the usefulness of molecular biology tools in the diagnostic process. Abnormal ultrasound in the 2nd trimester was noticed and Toxoplasma gondii was demonstrated in amniotic fluid at the 28th week of gestation both by PCR and by mice inoculation. Fansidar and folinic acid were administered. The newborn suffered from progressive hydrocephalus, seizures, and pathological muscular tonus; ultrasound examination showed massive cerebral calcifications. Ophthalmologic examination revealed bilateral choroidoretinitis. Congenital toxoplasmosis was confirmed by the detection of anti- T. gondii IgM and IgA in the neonatal serum. CONCLUSION: The presented case is an example of severe fetal toxoplasmosis diagnosed and treated in utero.

Adult↗