OBJECTIVETo investigate the neonatal umbilical cord blood thyroid stimulating hormone (TSH) level in the universal iodized salt areas and put forward the cut-point, then analyze its application.

METHODSSeven provinces were selected where the pregnant women having satisfied urinary iodine levels, then the urinary samples of pregnant women and the neonates cord blood were collected for urine iodine and TSH tests, and the relative factors were also recorded.

RESULTSTotal 1 524 urine and cord blood samples were collected from pregnant women and their new borns respectively. The median urinary iodine of pregnant women was 246.0 micro g/L, and the median TSH was 3.58 mU/L. The TSH level among seven areas and the neonatal delivery type varied significantly.

CONCLUSIONSThe neonatal cord blood TSH was influenced by several factors and could not be controlled, thus not be suitable as a iodine deficiency disorders surveillance indicator.

Delivery, Obstetric ; Female ; Fetal Blood ; drug effects ; metabolism ; Humans ; Iodine ; pharmacology ; urine ; Pregnancy ; Thyrotropin ; blood

The aim of this study was to explore the effects of the stromal cell-derived factor (SDF-1) and chemokine receptors (CXCR4) on chemotaxis of cord blood AC133(+) cells. The optimal SDF-1 concentration was determined in Transwell System. The cell migration was calculated from the number of cells passing through polycarbonate membrane with 8 microm pore. The expressions of CXCR4 in fresh and cultured cord blood AC133(+) cells were analyzed by flow cytometry with two-color direct immunofluorescence. The results showed that the chemotactic rate of fresh cord blood AC133(+) cells increased along with increasing concentrations of SDF-1, however, it tended to be stable when the concentration of SDF-1 reached 150 ng/ml. There was no difference in the chemotactic rate of cord blood AC133(+) cells between the group with SDF-1 adding CXCR4-blocking antibody and the group without SDF-1. When AC133(+) cells were cultured in vitro with hemopoietic growth factors, the expression of CXCR4 increased at the early stage, but decreased gradually along with time extending. In conclusion, there was correlation between the chemotactic rate of AC133(+) cells and the expression of chemokine receptor CXCR4.
Cell Line ; Chemokine CXCL12 ; pharmacology ; Chemotaxis ; Fetal Blood ; cytology ; Humans ; Receptors, CXCR4 ; metabolism ; Stromal Cells ; metabolism

OBJECTIVE: To explore the similarities and variations of biological phenotype and cytotoxicity of human umbilical cord blood natural killer cells (hUC- NK) after human umbilical cord blood-derived mononuclear cells (hUC-MNC) activated and expanded by two in vitro high-efficient strategies. METHODS: Umbilical cord blood mononuclear cells (MNC) from healthy donor were enriched by Ficoll-based density gradient centrifugation. Then, the phenotype, subpopulations, cell viability and cytotoxicity of NK cells derived from Miltenyi medium (denoted as M-NK) and X-VIVO 15 (denoted as X-NK) were compared using a "3IL" strategy. RESULTS: After a 14-day's culture, the contents of CD3^-CD56⁺ NK cells were elevated from 4.25%±0.04% (d 0) to 71%±0.18% (M-NK) and 75.2%±1.1% (X-NK) respectively. Compared with X-NK group, the proportion of CD3⁺CD4⁺ T cells and CD3⁺CD56⁺ NKT cells in M-NK group decreased significantly. The percentages of CD16⁺, NKG2D⁺, NKp44⁺, CD25⁺ NK cells in X-NK group was higher than those in the M-NK group, while the total number of expanded NK cells in X-NK group was half of that in M-NK group. There were no significant differences between X-NK and M-NK groups in cell proliferation and cell cycle, except for the lower percentage of Annexin V+ apoptotic cells in M-NK group. Compared with X-NK group, the proportion of CD107a⁺ NK cells in M-NK group were higher under the same effector-target ratio (E∶T) (P<0.05). CONCLUSION The two strategies were adequate for high-efficient generation of NK cells with high level of activation in vitro, however, there are differences in biological phenotypes and tumor cytotoxicity.
Humans ; Fetal Blood ; Killer Cells, Natural ; T-Lymphocytes ; Leukocytes, Mononuclear/metabolism* ; Cell Proliferation ; CD56 Antigen/metabolism*

Pregnancy ; Female ; Humans ; Fetal Blood/metabolism* ; DNA Methylation/genetics* ; Epigenesis, Genetic ; Placenta/metabolism* ; Exercise Therapy

PURPOSE: This study was undertaken to observe the blood levels of IGF-I and 1,25-(OH)2 Vit. D3 in maternal and neonatal compartments and the effects of IGF-I concentration on intrauterine fetal growth and 1,25-(OH)2 Vit. D3 metabolism in the presence of preeclampsia. METHODS: Thirty-four full-term pregnant women with preeclampsia and their newborns(preeclampsia group) and 10 normotensive full-term pregnant women and their newborns(normotensive group) were observed. IGF-I and 1,25-(OH)2 Vit. D3 concentrations in maternal and umbilical cord blood were analysed. RESULTS: Maternal and umbilical cord blood levels of IGF-I and 1,25-(OH)2 Vit. D3 were significantly lower in the preeclampsia group than in the normotensive group. In the preeclampsia group, maternal and cord blood levels of IGF-I of small-for-gestational age newborns were significantly lower than those of appropriate-for-gestational age newborns. The birth weight and length of newborns correlated with IGF-I concentrations of maternal and umbilical cord blood in small-for-gestational age newborns of preeclampsia group. The correlation between IGF-I and 1,25-(OH)2 Vit. D3 was significant in the umbilical cord blood of preeclampsia group, but only in appropriate-for-gestational age newborns. CONCLUSION: It is suggested that the lower level of IGF-I is the primary factor of intrauterine growth retardation in preeclampsia, and the effect of IGF-I on the metabolism of 1,25-(OH)2 Vit. D3 is different according to the presence of preeclampsia and intrauterine fetal growth retardation.
Birth Weight ; Cholecalciferol* ; Female ; Fetal Blood ; Fetal Development ; Fetal Growth Retardation ; Humans ; Infant, Newborn* ; Insulin-Like Growth Factor I ; Metabolism ; Mothers* ; Pre-Eclampsia* ; Pregnant Women ; Vitamins*

Blood Grouping and Crossmatching ; DNA ; blood ; Female ; Fetus ; metabolism ; Humans ; Maternal-Fetal Exchange ; Pregnancy ; blood ; Prenatal Diagnosis ; Sex Determination Analysis

OBJECTIVE: To explore the effect of hypoxia-supported umbilical cord mesenchymal stem cell (UC-MSC) on the expansion of cord blood mononuclear cell （MNC） in vitro. METHODS: The isolated cord blood mononuclear cells were inoculated on the preestablished umbilical cord mesenchymal stem cell layer and cultured under hypoxic conditions (3％ O₂) and the experimental groups were normoxia (MNCs were cultured under normoxic conditions), hypoxia (MNCs were cultured under hypoxic conditions), UC-MSC (MNCs were cultured with UC-MSC under normoxic conditions), and UC-MSC+hypoxia (MNCs were cultured with UC-MSC under hypoxic conditions). To further investigate the combinational effect of 3 factors of SCF+FL+TPO (SFT) on expansion of cord blood MNCs in vitro in hypoxia-supported UC-MSC culture system, the experiments were further divided into group A (MNCs were cultured with UC-MSC and SFT under normoxic conditions), group B (MNCs were cultured with UC-MSC under hypoxic conditions), group C (MNCs were cultured with UC-MSC and SFT under hypoxic conditions). The number of nucleated cells (TNC), CD34⁺ cell, CFU and CD34⁺CXCR4⁺, CD34⁺CD49d⁺, CD34⁺CD62L⁺ cells of each groups were detected at 0, 7, 10 and 14 days, respectively. RESULTS: Compared with group hypoxia and UC-MSC, group UC-MSC+hypoxia effectively promoted the expansion of TNC, CD34⁺ cell and CFU, and upregulated the expression level of adhesion molecule and CxCR4 of the cord blood CD34⁺ cell（P<0.05）. After culturing for 14 days, compared with group A and group B, group C effectively promoted the expansion of cord blood MNC at different time points（P<0.05）, and the effect of group A was better than that of group B at 7 and 10 days（P<0.05）. CONCLUSION Hypoxia-supported UC-MSC efficiently promoted the expansion and expression of adhesion molecule and CXCR4 of cord blood CD34⁺ cell, and the effect of expansion could be enhanced when SFT 3 factors were added.
Humans ; Cells, Cultured ; Fetal Blood ; Cell Proliferation ; Umbilical Cord/metabolism* ; Mesenchymal Stem Cells ; Antigens, CD34/metabolism* ; Hypoxia/metabolism*

With the availability of the method of analysis of serum protein using minute amounts of material, it was felt desirable to understand the protein metabolism and physiologic function in the body. The present study was undertaken to clarify the serum albumin, globulin and total protein at term to demonstrate the normal concentration and correlation between the 30 mother and newborn infant pairs. Serum albumin, globulin and total protein were determined by the Biuret method with pooled human serum. The A/G ration was calculated by formula of A/G. The following result were obstained. 1) In comparing the newborn infants of nonanemic mothers a albumin and total protein concentrations were higher and globlin concentrations decreased in the anemic mothers. 2) In comparing the nonanemic mothers and anemic mothers the mean albumin concentrations were nearly equal but globulin and total protein were slightly increased in the nonanemic mothers. 3) The mean serum albumin(of maternal and umbilical cord blood) was 3. 8+/-0. 35 gm/100 ml and 3. 8+/-0. 49 gm/100 ml respectively. 4) The mean serum globulin of mate. nal and umbilical cord blood was 2. 7+/-0. 41 gm/100 ml and 2. 32+/-0. 47 gm/100 ml respectively. The correlation of the globulin status between mot-hers and their newborn infants was not significant(r=0. 32). 5) The m-an serum total protein of maternal and umbilical cord blood was 6. 59+/-0. 59 gm/100 ml and 6. 02+/-0.57gm/100ml respectively.
Biuret ; Fetal Blood ; Humans ; Infant, Newborn* ; Metabolism ; Mothers* ; Serum Albumin* ; Umbilical Cord

OBJECTIVETo investigate the mRNA expression profiles of megakaryocytes (MKs) from human cord blood CD34+ cells ex vivo expanded using Solexa technique.

METHODSCD34+ Cells were isolated using density gradient centrifugation and magnetic activated cell sorting. Cultures were stimulated with recombinant human thrombopoietin (100 ng/ml). After 12 days, the MKs fraction was separated from the non-MKs fraction using an anti-CD41 monoclonal antibody by immunomagnetic sorting. The mRNA expression of MKs and non-MKs was detected by Solexa sequencing.

RESULTSWe obtained 3 773 147 and 3 533 805 Tags from MKs and non-MKs, respectively. The amounts of unambiguous tags were 3 291 132 and 2 967 947 and those of distinct tags were 197 769 and 245 318. The expression of 1161 genes was up-regulated and that of 902 genes down-regulated. The expression of 2717 tags was up-regulated and that of 1519 tags down-regulated.

CONCLUSIONSMKs and non-MKs have remarkably different mRNA expression profiles. The differential gene-encoded products may be involved in cellular development, adhesion, apoptosis metabolism, intra- and intercellular signal transduction, and immune response. Further studies on this topic may clarify the expression mechanism, signal transduction, and regulation mechanisms.

Antigens, CD34 ; Cells, Cultured ; Fetal Blood ; cytology ; Humans ; Megakaryocytes ; cytology ; metabolism ; RNA, Messenger ; genetics ; Transcriptome

PURPOSE: This study aimed to compare the regulatory T cells in cord blood of appropriate for gestational age (AGA) neonates with those of small for gestational age (SGA) neonates. MATERIALS AND METHODS: Umbilical cord blood was collected upon labor in 108 healthy full-term (between 37 and 41 gestational weeks) neonates, who were born between November 2010 and April 2012. Among them, 77 samples were obtained from AGA neonates, and 31 samples were obtained from SGA neonates. Regulatory T cells and lymphocyte subsets were determined using a flow cytometer. Student's t-test for independent samples was used to compare differences between AGA and SGA neonates. RESULTS: Regulatory T cells in cord blood were increased in the SGA group compared with normal controls (p=0.041). However, cytotoxic T cells in cord blood were significantly decreased in the SGA group compared with normal controls (p=0.007). CONCLUSION: This is the first study to compare the distribution of lymphocyte subsets including regulatory T cells in cord blood between AGA neonates and SGA neonates.
Biological Markers/metabolism ; Female ; Fetal Blood/*immunology ; Gestational Age ; Humans ; Infant, Newborn/*blood ; Infant, Small for Gestational Age/*blood ; Lymphocyte Count ; T-Lymphocytes, Cytotoxic/metabolism ; T-Lymphocytes, Regulatory/*metabolism