(1) Confined placental chorionic mosaicism is reported in 2% of viable pregnancies cytogenetically analyzed on chorionic villi samplings (CVS) at 9-12 weeks of gestation.
(2) Proliferating cells were abundant and scattered throughout the stratified epithelium before the appearance of villi.
(3) Acclimation to 10 degrees C or 30 degrees C resulted in large differences in the dimensions of villi.
(4) With the use of the radioimmunoassay for growth hormone--releasing inhibiting factor (GIF), it was found that measurable amounts of GIF-like substance existed in the chorionic villi and decidua of pregnant women.
(5) In the partial moles there is a slow hydatidiform change that affects only some of the villi, but which seems to follow along the same lines as in complete moles.
(6) Eight women at risk of bearing a child with a genetic defect had diagnostic chorionic villi sampling.
(7) We analyzed the trophoblast subpopulations which appear on touch smears of chorionic villi morphologically and immunohistochemically, using the uterine contents of 37 cases of induced abortion.
(8) In addition, we found that carbamoylphosphate synthetase mRNA is present mainly in the epithelium of the crypts of the proximal part of the small intestine, whereas carbamoylphosphate synthetase protein is present in the epithelium of both crypts and villi.
(9) The enzyme was found to be most active in the proximal quarter intestine and in the upper third of villi.
(10) Although normal human chorionic villi-associated hydrophobic placental folate receptors (PFR) are converted to hydrophilic forms by an endogenous, EDTA-sensitive, Mg(2+)-dependent protease under serum-free conditions (Verma, R. S., and Antony, A. C. (1991) J. Biol.
(11) The interconnected central lacteals in the villi overlying the interfollicular area were connected with the lymphatic plexus in the area.
(12) Hypercellular villi are found to have no importance.
(13) This basic surface was amplified to 500 cm2 by villi and to 1 m2 by the microvilli of enterocytes.
(14) Extensive interdigitation of cytoplasmic extensions and extended villi was present in mucinous and serous clusters which appeared to strengthen cluster cohesiveness.
(15) Also in comparison to the crypts, the villi incorporated 1.5-fold more [(14)C]-acetate into sterols, a ratio similar to that describing the distribution of HMG-CoA reductase in the two cell populations.
(16) Many thousands of arachnoid villi subtend all the membranes from the intrathecal space, and many of these end in the large epidural veins.
(17) The remaining, smaller villi lose their connection with the decidua.
(18) This study compares, in 2-d-old rats, the migration rates of epithelial cells on villi of the small intestine, using two labelling methods: a single [3H] thymidine injection; and cytoplasmic labelling by a single ingestion of Pu-citrate.
(19) As invasion continued trophoblastic villi, consisting of cores of cytotrophoblast covered by a continuous layer of syncytium, penetrated deeper into the endometrium.
(20) Investigations revealed total atrophy of the villi and primary agammaglobulinemia.
Villus
Definition:
(n.) One of the minute papillary processes on certain vascular membranes; a villosity; as, villi cover the lining of the small intestines of many animals and serve to increase the absorbing surface.
(n.) Fine hairs on plants, resembling the pile of velvet.
Example Sentences:
(1) The human placental villus tissue contains opioid receptors and peptides.
(2) The mean villus height for each rat was calculated and compared by two-way ANOVA to determine the effects of time and treatment.
(3) In the Netherlands, researchers studied the medical records of and followed-up on 151 women of advanced maternal age (at least 36 years old) who underwent amniocentesis or chorionic villus sampling (CVS) and elected to terminate the pregnancy due to an abnormal genetic finding (105 and 46 women, respectively) at Academic Hospital Rotterdam-Dijkzigt between January 1980 and December 1989.
(4) There was also a reduced crypt cell proliferation, a reduced villus height and a decreased ALP activity in the ileal mucosa.
(5) The following examinations could be proposed: in high risk cases determined before pregnancy, a chorionic villus sampling should be done between the 9th and 11th weeks of gestation; in low risk cases such as advanced maternal age, a first trimester chorionic villus sampling or a second trimester amniocentesis could be chosen; in the case of Down's syndrome, warning signs, for example ultrasonographic or biological parameters, a second trimester placental biopsy to relieve the parents' anxiety; in high risk cases such as ultrasonographic malformations, late placental biopsy or cordocentesis.
(6) Explants maintained villus-to-crypt ratio between 1:1 and 1.5:1 for 48 hours.
(7) The two membrane fractions obtained from villus cells and considered to be lateral-basal membranes were enriched for Na+,K+-ATPase activity, but one also showed enrichment in glycosyltransferase activity.
(8) The molecular mechanism of calcium transport in the villus cells has been examined.
(9) Succinylated wheat germ agglutinin bound more to crypt than to villus enterocytes.
(10) Altogether 10 reports on the safety of chorionic villus sampling, either by the transcervical (TC) or the transabdominal (TA) approach, were reviewed and combined with our own data.
(11) To address the evolving trends in the choice of transabdominal or transcervical chorionic villus sampling (CVS) at a teaching hospital and to evaluate the influence of gestational age on the approach chosen.
(12) Kinetic analysis is compatible with the suggestion that the glucose carriers are predominantly near the tip of the villus, whereas those for galactose and 3-O-MG are located along the entire villus and the Km * of their carriers at the tip is lower than their Km * towards the base of the villus.
(13) (ii) In young sucklings (10 days old), SC was virtually absent in both villus and crypt cells, but its concentration progressively increased in weanling rats and reached adult levels by day 40 postpartum.
(14) In both cases first trimester chorionic villus sampling and DNA haplotype analysis predicted that the fetus is a carrier for CF, and in the doubly affected family a carrier for beta-thalassaemia as well.
(15) In mammalian small intestine absorptive cells are known to migrate from the villus base to the villus tip from which they slough.
(16) Immunofluorescence studies employing monoclonal antibodies specific for villus and crypt cells in vivo, and various enzyme assays, have demonstrated a level of differentiation and maturation of the cultured epithelial cells similar but not identical to that of suckling intestinal mucosa in vivo.
(17) Features suggestive of a latent gluten-sensitive enteropathy were found in one of the other six DH patients; he developed disaccharidase deficiencies and villus atrophy when 20 g gluten was added to his usual gluten-containing diet.
(18) Chorionic villus sampling (CVS) has made possible the first-trimester prenatal diagnosis of CF.
(19) Integrity of the digestive tissue is dependent on continuous coordination between cell growth and maturation along the crypt- villus axis.
(20) Sucrase-isomaltase (SI) is an enterocyte-specific, brush-border enzyme that has little activity in crypt cells and maximal activity in low and mid villus cells.