Dataset Information

Underweight full-term Indian neonates show differences in umbilical cord blood leukocyte phenotype: a cross-sectional study.

ABSTRACT:

Background

While infections are a major cause of neonatal mortality in India even in full-term neonates, this is an especial problem in the large proportion (~20%) of neonates born underweight (or small-for-gestational-age; SGA). One potential contributory factor for this susceptibility is the possibility that immune system maturation may be affected along with intrauterine growth retardation.

Methods

In order to examine the possibility that differences in immune status may underlie the susceptibility of SGA neonates to infections, we enumerated the frequencies and concentrations of 22 leukocyte subset populations as well as IgM and IgA levels in umbilical cord blood from full-term SGA neonates and compared them with values from normal-weight (or appropriate-for-gestational-age; AGA) full-term neonates. We eliminated most SGA-associated risk factors in the exclusion criteria so as to ensure that AGA-SGA differences, if any, would be more likely to be associated with the underweight status itself.

Results

An analysis of 502 such samples, including 50 from SGA neonates, showed that SGA neonates have significantly fewer plasmacytoid dendritic cells (pDCs), a higher myeloid DC (mDC) to pDC ratio, more natural killer (NK) cells, and higher IgM levels in cord blood in comparison with AGA neonates. Other differences were also observed such as tendencies to lower CD4:CD8 ratios and greater prominence of inflammatory monocytes, mDCs and neutrophils, but while some of them had substantial differences, they did not quite reach the standard level of statistical significance.

Conclusions

These differences in cellular lineages of the immune system possibly reflect stress responses in utero associated with growth restriction. Increased susceptibility to infections may thus be linked to complex immune system dysregulation rather than simply retarded immune system maturation.

SUBMITTER: Rathore DK

PROVIDER: S-EPMC4405369 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature

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Publications

Underweight full-term Indian neonates show differences in umbilical cord blood leukocyte phenotype: a cross-sectional study.

Rathore Deepak K DK Nair Deepa D Raza Saimah S Saini Savita S Singh Reeta R Kumar Amit A Tripathi Reva R Ramji Siddarth S Batra Aruna A Aggarwal Kailash C KC Chellani Harish K HK Arya Sugandha S Bhatla Neerja N Paul Vinod K VK Aggarwal Ramesh R Agarwal Nidhi N Mehta Umesh U Sopory Shailaja S Natchu Uma Chandra Mouli UC Bhatnagar Shinjini S Bal Vineeta V Rath Satyajit S Wadhwa Nitya N

PloS one 20150421 4

<h4>Background</h4>While infections are a major cause of neonatal mortality in India even in full-term neonates, this is an especial problem in the large proportion (~20%) of neonates born underweight (or small-for-gestational-age; SGA). One potential contributory factor for this susceptibility is the possibility that immune system maturation may be affected along with intrauterine growth retardation.<h4>Methods</h4>In order to examine the possibility that differences in immune status may underl ...[more]

PMID: 25898362

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Dataset Information

Underweight full-term Indian neonates show differences in umbilical cord blood leukocyte phenotype: a cross-sectional study.

Background

Methods

Results

Conclusions

Publications

Underweight full-term Indian neonates show differences in umbilical cord blood leukocyte phenotype: a cross-sectional study.

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