B Hargitai

Semmelweis University, Budapest, Budapest fovaros, Hungary

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Publications (15)26.03 Total impact

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    ABSTRACT: Placental protein 13 (PP13) is a galectin expressed by the syncytiotrophoblast. Women who subsequently develop preterm pre-eclampsia have low first trimester maternal serum PP13 concentrations. This study revealed that third trimester maternal serum PP13 concentration increased with gestational age in normal pregnancies (p < 0.0001), and it was significantly higher in women presenting with preterm pre-eclampsia (p = 0.02) and hemolysis, elevated liver enzymes, and low platelet count (HELLP) syndrome (p = 0.01) than in preterm controls. Conversely, placental PP13 mRNA (p = 0.03) and protein, as well as cytoplasmic PP13 staining of the syncytiotrophoblast (p < 0.05) was decreased in these pathological pregnancies compared to controls. No differences in placental expression and serum concentrations of PP13 were found at term between patients with pre-eclampsia and control women. In contrast, the immunoreactivity of the syncytiotrophoblast microvillous membrane was stronger in both term and preterm pre-eclampsia and HELLP syndrome than in controls. Moreover, large syncytial cytoplasm protrusions, membrane blebs and shed microparticles strongly stained for PP13 in pre-eclampsia and HELLP syndrome. In conclusion, parallel to its decreased placental expression, an augmented membrane shedding of PP13 contributes to the increased third trimester maternal serum PP13 concentrations in women with preterm pre-eclampsia and HELLP syndrome.
    Archiv für Pathologische Anatomie und Physiologie und für Klinische Medicin 10/2008; 453(4):387-400. · 2.68 Impact Factor
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    ABSTRACT: Periventricular leukomalacia of pre- or postnatal onset is responsible for severe neurological and intellectual impairment and cerebral palsy later in life. The etiology is multifactorial, involving hypoxic-ischemic insults of various origin. The disorder is characterized by multiple necrotic foci of the white matter found most frequently adjacent to the lateral ventricles. In the past, intrapartum factors were thought to be the major cause of neonatal brain damage, but recent investigations highlighted the role of antenatal risk factors. We present 4 cases of antenatally diagnosed brain injury with known and unusual etiology.
    Fetal Diagnosis and Therapy 02/2008; 23(1):18-22. · 1.90 Impact Factor
  • Clinical Endocrinology 12/2007; 67(5):805-6. · 3.40 Impact Factor
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    ABSTRACT: Together with chromosome 19, chromosome 20 belongs to group F, the group of small metacentric chromosomes. Trisomy 20 mosaicism is one of the most frequent chromosomal mosaicisms, representing approximately 16% of prenatally diagnosed cases. In nonmosaic trisomy 20, the usual findings are severe and manifold. Only 3 cases in the literature involved fetuses surviving past the first trimester. In case 1, a 42-year-old woman presented in her sixth pregnancy; she had had 4 vaginal deliveries of term infants and a miscarriage. Both her familial and personal genetic histories were unremarkable. Genetic amniocentesis was performed in the 18th gestational week for advanced maternal age. Sample analysis revealed a normal, male karyotype in 27 mitoses, while 4 were trisomy 20 (46,XY [27]/47,XY, +20 [4]). In the 37th gestational week a live, immature, male infant weighing 1,730 g was delivered. Chromosomal investigation of the newborn's blood sample did not reveal trisomy 20 but a normal male karyotype. In case 2, a healthy 37-year-old nullipara underwent amniocentesis at the 18th week of pregnancy for advanced maternal age. Amniotic fluid cell karyotype revealed trisomy 20 (47,XX, +20). Ultrasonography performed simultaneously with genetic amniocentesis showed slightly shortened fetal long bones, detectable narrowing of the cranium in the region of the frontal bone, lateral ventricles of 10 mm in width bilaterally, echogenic bowel and polyhydramnios. Abortion was induced in the 23rd week of pregnancy, and a 490-g female fetus was delivered. Based on these 2 well-documented, prenatally diagnosed cases, as far as genetic counseling is concerned, nonmosaic trisomy 20 is much less challenging than its mosaic form since the prognosis is uniformly poor in the former.
    The Journal of reproductive medicine 04/2006; 51(3):209-12. · 0.75 Impact Factor
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    ABSTRACT: An extremely high alkaline phosphatase (AP) concentration (3609 IU/litre) was found in a 20 year old primigravida at 37 week's gestation, prompting an examination of its histological and cellular origin. Immunohistochemistry and western blots using antibodies against AP, Ki-67, phospho-protein kinase B (Akt), phospho-p44/42 mitogen activated protein kinase/extracellular signal regulated kinase 1/2 (MAPK/Erk1/2), phospho-glycogen synthase kinase-3beta (GSK-3beta), phospho-stress activated protein kinase/c-Jun N-terminal kinase, total-Akt, total-GSK-3beta, and phospho-p38-MAPK were carried out on index and control placental samples of the same gestational age. Compared with controls, staining of the index placenta showed minimal AP labelling of the brush border and remarkable positivity of the intervillous space. Cytotrophoblastic proliferation was 8-10% in the index placenta compared with 1-2% in controls. The index placenta also had raised concentrations of protein kinases with important roles in cell differentiation. The proliferation and differentiation rates of the cytotrophoblasts were found to be five times higher in index samples than in controls. It is hypothesised that loss of syncytial membranes in immature villi led to increased AP concentrations in the maternal circulation and decreased AP staining of the placenta. Loss of the syncytium might also stimulate increased proliferation of villous cytotrophoblasts, which would then fuse and maintain the syncytium.
    Journal of Clinical Pathology 02/2005; 58(1):72-6. · 2.44 Impact Factor
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    ABSTRACT: An exomphalos containing unusual solid and cystic mass was diagnosed during a routine ultrasound examination in the 17th week of gestation. Further investigations were planned but the pregnancy was terminated. The fetopathological examination revealed an umbilical cord teratoma. Although this entity is very rare it should be emphasized as a possible differential diagnosis when cystic lesion of the cord is detected. Large teratomas associated with abdominal wall defect may have poor fetal outcome and can be associated with structural and chromosomal abnormalities. In our case trisomy 13 was diagnosed.
    Fetal Diagnosis and Therapy 01/2005; 20(6):528-33. · 1.90 Impact Factor
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    B Hargitai, T Marton, P M Cox
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    ABSTRACT: The human placenta is an underexamined organ. The clinical indications for placental examination have no gold standards. There is also inconsistency in the histological reports and the quality is variable. There is great interobserver variability concerning the different entities. Although there are still grey areas in clinicopathological associations, a few mainstream observations have now been clarified. The histopathological examination and diagnosis of the placenta may provide crucial information. It is possible to highlight treatable maternal conditions and identify placental or fetal conditions that can be recurrent or inherited. To achieve optimal benefit from placental reports, it is essential to standardise the method of placenta examination. This article summarises the clinical indications for placenta referral and the most common acknowledged clinicopathological correlations.
    Journal of Clinical Pathology 09/2004; 57(8):785-92. · 2.44 Impact Factor
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    Ultrasound in Obstetrics and Gynecology 08/2004; 24(3):360 - 360. · 3.56 Impact Factor
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    ABSTRACT: Preterm birth may be associated with hypoxic-ischaemic encephalopathy (HIE) showing a well recognised number of patterns, including neuronal karyorrhexis/eosinophilia mostly at the diencephalon and brain stem and leukomalacia at the periventricular white matter. To investigate whether programmed cell death or apoptosis plays a role in HIE, we examined human brains of preterm infants. Brain tissue samples from 12 consecutive infants (24-34 weeks of gestation) were available at post-mortem examination (1998-2000) after approval of the Ethics Committee. Two tissue sections were stereologically localised after brain fixation, slice preparation, and comparison with ultrasound imaging. We studied the periventricular white matter and the corresponding cortical region in each brain. Conventional histological stains were used. In addition, apoptosis was detected using a neuronal-specific terminal deoxynucleotidyl transferase-mediated nick end-labelling (TUNEL) method (NeuroTACS). A semiquantitative evaluation was performed to compare regions close to brain lesions with injury-free areas. Neuronal apoptosis was low in both cortical and in periventricular regions. No glial apoptosis was detected. Apoptosis in neurones was, however, detected in preterm brains with bacterial or mycotic infection. These results point out to the ambiguity of the TUNEL-reactive neurons in the diseased premature infants using fine-tuned ultrasound-guided neuropathological analysis, support the probable coexistence of neuronal TUNEL-reactivity and infection, and suggest that the association between apoptosis and HIE should overall be viewed with more caution.
    Brain and Development 02/2004; 26(1):30-6. · 1.67 Impact Factor
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    ABSTRACT: Rather few papers are about first trimesters pathology. The reason of this roots in the technical difficulties. The first trimesters pathology can not be separated from prenatal diagnostics. The authors summarized the molecular basis of embryology, malformations, and published cases that had been diagnosed prenatally. In the I. Department of Obstetrics and Gynecology, Semmelweis University in Budapest between 1995. and 2000. altogether sixty embryos 70 gms or smaller were examined. Malformations included neural tube defects, disorders of twinning, body stalk defect, chromosome aberrations, hydrops, omphalocele and gastroschisis. Examination of early embryos may discover many results on the fields of prenatal diagnosis and the pathomechanism of developmental abnormalities.
    Orvosi Hetilap 07/2003; 144(24):1185-98.
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    ABSTRACT: Heterotaxy syndrome (Ivemark syndrome, or asplenia-polysplenia syndrome) is a heterogeneous group of disease with disturbed body symmetry and malposition of internal organs. Heterotaxy syndrome is caused by the disturbance of the left/right axis in the early embryonic period. The most frequency of heterotaxy syndrome's concomitant anomalies during a five year period in own fetopathology material. Data of fetopathologic examination of 13 fetuses suffering from prenatally diagnosed heterotaxy syndrome. Situs ambiguus was detected in 9 cases out of 13. In the remaining 4 cases situs inversus totalis was diagnosed. The most frequent and important associated malformation included congenital heart disease was AV channel (10/13) and great vessel anomaly (10/13). In cases with prenatally detected complex cardiac anomalies (especially AV channel cases) heterotaxy anomaly must be taken into consideration, with main consequences in prenatal counselling.
    Orvosi Hetilap 03/2002; 143(6):299-301.
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    ABSTRACT: Apoptosis, the well-characterized form of active programmed cell death, is a physiologic phenomenon in embryonal and fetal life in developing organs. Severe hypoxia, which occurs in most preterm infants, also leads to cell death, which may be necrotic or apoptotic. The aim of our study was to examine the incidence of apoptosis in various organs (such as lung, kidney, and brain) of preterm infants who suffered from clinically proven respiratory distress causing infantile respiratory distress syndrome (IRDS), cardiac failure, and periventricular leukomalacia (PVL). Twenty-four autopsy cases were studied histologically to detect the apoptotic ratio, which was performed on the basis of hematoxylin and eosin staining and validated by terminal deoxynucleotidyl transferase-mediated nick end-labeling (TUNEL) reaction. Elevated apoptotic ratio was found in stages II, III, and IV of bronchopulmonary dysplasia (BPD) among alveolar and bronchiolar cells. The apoptotic activity was very low in stage I of BPD. High apoptotic ratio was detected in hypoxic injuries of the central nervous system (CNS) of preterm infants. Features of apoptosis were present in proximal and excreting tubules of the kidney. Significant elevation of apoptotic activity may play a role in the development of BPD, ischemic brain lesions, and renal failure.
    Pediatric Research 08/2001; 50(1):110-4. · 2.67 Impact Factor
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    ABSTRACT: Authors report on the practice and most important genetic questions of fetopathological examinations. A so called genetic-morphologic approach is suggested. The observer needs special knowledge to recognize major and minor signs of defects in fetuses in the second, or sometimes even in the first trimester. Spontaneous abortions in the first trimester are caused mainly by chromosome aberrations. In the second trimester the main causes of spontaneous abortions are maternal in origin or secondary to intrauterine infection. Medical legal aspects are also reviewed. For proper documentation a photo or X-ray must be taken. Cytogenetic and molecular genetic methods are also very important tools, therefore examination must be performed before fixation. For the first time in Hungary fetal biometric data are presented with correlation between gestational age and different organ weights. Our aim is to promote better understand of fetal malformations and disorders.
    Orvosi Hetilap 07/1999; 140(25):1411-6.
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    ABSTRACT: To determine the accuracy of lung cancer mortality data based on clinical observations in the absence of autopsy and to identify factors affecting the accuracy of diagnosis. Admission, pre-autopsy and post-autopsy diagnoses were recorded for 1000 consecutive autopsies in each of two University departments in Budapest with high autopsy rates for persons dying in hospital. In those 87 cases where one or more diagnosis included primary lung cancer, additional data were collected concerning clinical investigations relevant to the diagnosis and the histological type lung cancer, and on smoking habits. 59% (36/61) of lung cancers seen at autopsy were not detected pre-autopsy, while 50% (25/50) of those diagnosed pre-autopsy were not confirmed at autopsy. Many misdiagnoses arose because patients were too ill to be properly investigated and/or died before investigations could be completed. Accuracy of diagnosis increased with the number of diagnostic techniques applied, but was still far from perfect in the absence of necropsy. Underdiagnosis was commoner in non-smokers and overdiagnosis commoner in smokers. Without necropsy, lung cancer misdiagnosis is common, especially when modern diagnostic procedures cannot be fully employed. Knowledge of smoking habits may affect diagnostic accuracy.
    General & diagnostic pathology 04/1996; 141(3-4):169-78.
  • B Szende, F Timár, B Hargitai
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    ABSTRACT: Oral carbon tetrachloride (CCl4) poisoning of the liver of male F-344 rats was modified by dissolving CCl4 in various oils (sunflower, corn, fish and olive). After 8 weeks of CCl4 treatment (3 x 0.2 ml/kg body weight every other day, dissolved in aliquots of 0.5 ml of each types of oil) the rats were sacrificed and the ratio of connective tissue in the liver was determined by morphometry after picrosirius staining. The percentage of collagen fibres increased in all CCl4-treated groups compared to the controls. This increase was almost the same (6-8%) in the case of CCl4 dissolved in sunflower, corn or fish oil, but when olive oil was applied as a solvent, the collagen ratio was only 2-4 percent. On the bases of this finding olive oil is considered as less harmful to the liver in acute CCl4 poisoning than other oils.
    Experimental and Toxicologic Pathology 11/1994; 46(4-5):355-9. · 2.62 Impact Factor

Publication Stats

124 Citations
26.03 Total Impact Points

Institutions

  • 1994–2008
    • Semmelweis University
      • • First Department of Obstetrics and Gynaecology
      • • Faculty of Medicine
      • • First Department of Pathology and Experimental Cancer Research
      Budapest, Budapest fovaros, Hungary