Cardiovascular System - Blood Development - Revision history

Z8600021 at 01:43, 28 September 2020

2020-09-28T01:43:47Z

← Older revision		Revision as of 12:43, 28 September 2020
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			* '''CHD7 and Runx1 interaction provides a braking mechanism for hematopoietic differentiation'''[https://www.pnas.org/content/117/38/23626 PNAS] "Hematopoietic stem and progenitor cell (HSPC) formation and lineage differentiation involve gene expression programs orchestrated by transcription factors and epigenetic regulators. Genetic disruption of the chromatin remodeler chromodomain-helicase-DNA-binding protein 7 (CHD7) expanded phenotypic HSPCs, erythroid, and myeloid lineages in {{zebrafish}} and {{mouse}} embryos. CHD7 acts to suppress hematopoietic differentiation. Binding motifs for RUNX and other hematopoietic transcription factors are enriched at sites occupied by CHD7, and decreased RUNX1 occupancy correlated with loss of CHD7 localization. CHD7 physically interacts with RUNX1 and suppresses RUNX1-induced expansion of HSPCs during development through modulation of RUNX1 activity. Consequently, the RUNX1:CHD7 axis provides proper timing and function of HSPCs as they emerge during hematopoietic development or mature in adults, representing a distinct and evolutionarily conserved control mechanism to ensure accurate hematopoietic lineage differentiation." [https://www.omim.org/entry/608892 OMIM - CHD7] \| [https://www.omim.org/entry/151385 OMIM - RUNX1]

	* '''Decoding human fetal {{liver}} {{haematopoiesis}}'''{{#pmid:31597962\|PMID31597962}} "Definitive {{haematopoiesis}} in the fetal {{liver}} supports self-renewal and differentiation of haematopoietic stem cells and multipotent progenitors (HSC/MPPs) but remains poorly defined in humans. Here, using single-cell transcriptome profiling of approximately 140,000 liver and 74,000 skin, kidney and {{yolk sac}} cells, we identify the repertoire of human {{blood}} and {{immune}} cells during development. We infer differentiation trajectories from HSC/MPPs and evaluate the influence of the tissue microenvironment on blood and immune cell development. We reveal physiological erythropoiesis in fetal skin and the presence of mast cells, natural killer and innate lymphoid cell precursors in the {{yolk sac}}. We demonstrate a shift in the haemopoietic composition of fetal liver during gestation away from being predominantly erythroid, accompanied by a parallel change in differentiation potential of HSC/MPPs, which we functionally validate. Our integrated map of fetal liver haematopoiesis provides a blueprint for the study of paediatric blood and immune disorders, and a reference for harnessing the therapeutic potential of HSC/MPPs." {{liver}}		* '''Decoding human fetal {{liver}} {{haematopoiesis}}'''{{#pmid:31597962\|PMID31597962}} "Definitive {{haematopoiesis}} in the fetal {{liver}} supports self-renewal and differentiation of haematopoietic stem cells and multipotent progenitors (HSC/MPPs) but remains poorly defined in humans. Here, using single-cell transcriptome profiling of approximately 140,000 liver and 74,000 skin, kidney and {{yolk sac}} cells, we identify the repertoire of human {{blood}} and {{immune}} cells during development. We infer differentiation trajectories from HSC/MPPs and evaluate the influence of the tissue microenvironment on blood and immune cell development. We reveal physiological erythropoiesis in fetal skin and the presence of mast cells, natural killer and innate lymphoid cell precursors in the {{yolk sac}}. We demonstrate a shift in the haemopoietic composition of fetal liver during gestation away from being predominantly erythroid, accompanied by a parallel change in differentiation potential of HSC/MPPs, which we functionally validate. Our integrated map of fetal liver haematopoiesis provides a blueprint for the study of paediatric blood and immune disorders, and a reference for harnessing the therapeutic potential of HSC/MPPs." {{liver}}

Z8600021 at 22:55, 25 August 2020

2020-08-25T22:55:37Z

← Older revision		Revision as of 09:55, 26 August 2020
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	[[File:Stage_22_image_224.jpg\|thumb\|Embryonic red blood cells]]		[[File:Stage_22_image_224.jpg\|thumb\|Embryonic red blood cells]]
	[[File:Stage 22 image 223.jpg\|thumb\|Aorta filled with red blood cells ([[Carnegie stage 22]], [[Week 8]])]]		[[File:Stage 22 image 223.jpg\|thumb\|Aorta filled with red blood cells ([[Carnegie stage 22]], [[Week 8]])]]
	Initially {{blood}} develops within the core of "blood islands" along with blood vessels in {{mesoderm}}. Blood is considered as a form of "liquid conective tissue" consisting of a fluid and cellular component. Mesoderm both within the embryo ({{mesoderm}}) and outside the mesoderm (extra-embryonic mesoderm). Within the embryo the aorta in the aorta-gonad-mesonephros (AGM) region (para-aortic splanchnopleura), and the vitelline and placental arteries are initial sites. There then follows a series of "relocations" of the stem cells to different organs ({{liver}}, {{spleen}} and {{thymus}}) within the embryo and fetus. In the adult, these stem cells are located in the {{bone marrow}}. At the time when blood first forms there are no bones, and it is only with bone development that we see bone marrow formation and relocation of blood stem cells.		Initially {{blood}} develops within the core of "blood islands" along with blood vessels in {{mesoderm}}. Blood is considered as a form of "liquid conective tissue" consisting of a fluid and cellular component. Mesoderm both within the embryo ({{mesoderm}}) and outside the mesoderm (extra-embryonic mesoderm). Within the embryo the aorta in the aorta-gonad-mesonephros (AGM) region (para-aortic splanchnopleura), and the vitelline ({{yolk sac}}) and placental arteries are initial sites. There then follows a series of "relocations" of the stem cells to different organs ({{liver}}, {{spleen}} and {{thymus}}) within the embryo and fetus. In the adult, these stem cells are located in the {{bone marrow}}. At the time when blood first forms there are no bones, and it is only with bone development that we see bone marrow formation and relocation of blood stem cells.

Z8600021 at 00:25, 19 August 2020

2020-08-19T00:25:44Z

← Older revision		Revision as of 11:25, 19 August 2020
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	===Sickle Cell Anemia===		===Sickle Cell Anemia===
	{\|		{\|
	\| People who have this form of sickle cell disease inherit two sickle cell genes (“S”), one from each parent. This is commonly called “sickle cell anemia”, and is usually the most severe form of the disease. The name comes from the "sickle" shape of the RBC compared to the normal "donut" shape.		\| People who have this form of {{sickle cell disease}} inherit two sickle cell genes (“S”), one from each parent. This is commonly called “sickle cell anemia”, and is usually the most severe form of the disease. The name comes from the "sickle" shape of the RBC compared to the normal "donut" shape.


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	Sickle cell RBC (Image CDC)		Sickle cell RBC (Image CDC)
	\|}		\|}

			A recent study has shown that Sickle cell disease can induce resistance to cutaneous carcinogenesis.{{#pmid:32143660\|PMID32143660}}

	===Thalassemia===		===Thalassemia===

Z8600021 at 05:12, 23 Ocak 2020

2020-01-23T05:12:17Z

← Older revision		Revision as of 16:12, 23 Ocak 2020
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	[[File:Stage_22_image_224.jpg\|thumb\|Embryonic red blood cells]]		[[File:Stage_22_image_224.jpg\|thumb\|Embryonic red blood cells]]
	[[File:Stage 22 image 223.jpg\|thumb\|Aorta filled with red blood cells ([[Carnegie stage 22]], [[Week 8]])]]		[[File:Stage 22 image 223.jpg\|thumb\|Aorta filled with red blood cells ([[Carnegie stage 22]], [[Week 8]])]]
	Initially {{blood}} develops within the core of "blood islands" along with blood vessels in {{mesoderm}}. Blood is considered as a form of "liquid conective tissue" consisting of a fluid and cellular component. Mesoderm both within the embryo ({{mesoderm}}) and outside the mesoderm (extra-embryonic mesoderm). Within the embryo the aorta in the aorta-gonad-mesonephros (AGM) region (para-aortic splanchnopleura), and the vitelline and placental arteries are initial sites. There then follows a series of "relocations" of the stem cells to different organs ({{liver}}, {{spleen}} and {{thymus}}) within the embryo and fetus. In the adult, these stem cells are located in the bone marrow. At the time when blood first forms there are no bones, and it is only with bone development that we see bone marrow formation and relocation of blood stem cells.		Initially {{blood}} develops within the core of "blood islands" along with blood vessels in {{mesoderm}}. Blood is considered as a form of "liquid conective tissue" consisting of a fluid and cellular component. Mesoderm both within the embryo ({{mesoderm}}) and outside the mesoderm (extra-embryonic mesoderm). Within the embryo the aorta in the aorta-gonad-mesonephros (AGM) region (para-aortic splanchnopleura), and the vitelline and placental arteries are initial sites. There then follows a series of "relocations" of the stem cells to different organs ({{liver}}, {{spleen}} and {{thymus}}) within the embryo and fetus. In the adult, these stem cells are located in the {{bone marrow}}. At the time when blood first forms there are no bones, and it is only with bone development that we see bone marrow formation and relocation of blood stem cells.

Z8600021 at 00:11, 13 December 2019

2019-12-13T00:11:00Z

← Older revision		Revision as of 11:11, 13 December 2019
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	* '''Decoding human fetal {{liver}} {{haematopoiesis}}'''{{#pmid:31597962\|PMID31597962}} "Definitive {{haematopoiesis}} in the fetal {{liver}} supports self-renewal and differentiation of haematopoietic stem cells and multipotent progenitors (HSC/MPPs) but remains poorly defined in humans. Here, using single-cell transcriptome profiling of approximately 140,000 liver and 74,000 skin, kidney and {{yolk sac}} cells, we identify the repertoire of human {{blood}} and {{immune}} cells during development. We infer differentiation trajectories from HSC/MPPs and evaluate the influence of the tissue microenvironment on blood and immune cell development. We reveal physiological erythropoiesis in fetal skin and the presence of mast cells, natural killer and innate lymphoid cell precursors in the {{yolk sac}}. We demonstrate a shift in the haemopoietic composition of fetal liver during gestation away from being predominantly erythroid, accompanied by a parallel change in differentiation potential of HSC/MPPs, which we functionally validate. Our integrated map of fetal liver haematopoiesis provides a blueprint for the study of paediatric blood and immune disorders, and a reference for harnessing the therapeutic potential of HSC/MPPs." {{~~blood~~}}		* '''Decoding human fetal {{liver}} {{haematopoiesis}}'''{{#pmid:31597962\|PMID31597962}} "Definitive {{haematopoiesis}} in the fetal {{liver}} supports self-renewal and differentiation of haematopoietic stem cells and multipotent progenitors (HSC/MPPs) but remains poorly defined in humans. Here, using single-cell transcriptome profiling of approximately 140,000 liver and 74,000 skin, kidney and {{yolk sac}} cells, we identify the repertoire of human {{blood}} and {{immune}} cells during development. We infer differentiation trajectories from HSC/MPPs and evaluate the influence of the tissue microenvironment on blood and immune cell development. We reveal physiological erythropoiesis in fetal skin and the presence of mast cells, natural killer and innate lymphoid cell precursors in the {{yolk sac}}. We demonstrate a shift in the haemopoietic composition of fetal liver during gestation away from being predominantly erythroid, accompanied by a parallel change in differentiation potential of HSC/MPPs, which we functionally validate. Our integrated map of fetal liver haematopoiesis provides a blueprint for the study of paediatric blood and immune disorders, and a reference for harnessing the therapeutic potential of HSC/MPPs." {{liver}}

	* '''The association between AB blood group and neonatal disease'''{{#pmid:30347622\|PMID30347622}} "Numerous studies have examined the association between ABO blood groups and adult disease states, but very few have studied the neonatal population. The objective of this study was to determine the relationship between AB blood group and the occurrence of common neonatal disorders such as neutropenia at birth, sepsis, respiratory distress syndrome (RDS), intraventricular hemorrhage (IVH), retinopathy of prematurity (ROP), and patent ductus arteriosus (PDA) compared to all other blood groups. ...We hypothesize that the phenotypic expression of A and B antigens, rather than the antigens themselves, in the AB group may reveal an enhanced susceptibility to injury at the endothelial level resulting in an increased risk for disease development."		* '''The association between AB blood group and neonatal disease'''{{#pmid:30347622\|PMID30347622}} "Numerous studies have examined the association between ABO blood groups and adult disease states, but very few have studied the neonatal population. The objective of this study was to determine the relationship between AB blood group and the occurrence of common neonatal disorders such as neutropenia at birth, sepsis, respiratory distress syndrome (RDS), intraventricular hemorrhage (IVH), retinopathy of prematurity (ROP), and patent ductus arteriosus (PDA) compared to all other blood groups. ...We hypothesize that the phenotypic expression of A and B antigens, rather than the antigens themselves, in the AB group may reveal an enhanced susceptibility to injury at the endothelial level resulting in an increased risk for disease development."

Z8600021 at 23:51, 12 December 2019

2019-12-12T23:51:52Z

← Older revision		Revision as of 10:51, 13 December 2019
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			* '''Decoding human fetal {{liver}} {{haematopoiesis}}'''{{#pmid:31597962\|PMID31597962}} "Definitive {{haematopoiesis}} in the fetal {{liver}} supports self-renewal and differentiation of haematopoietic stem cells and multipotent progenitors (HSC/MPPs) but remains poorly defined in humans. Here, using single-cell transcriptome profiling of approximately 140,000 liver and 74,000 skin, kidney and {{yolk sac}} cells, we identify the repertoire of human {{blood}} and {{immune}} cells during development. We infer differentiation trajectories from HSC/MPPs and evaluate the influence of the tissue microenvironment on blood and immune cell development. We reveal physiological erythropoiesis in fetal skin and the presence of mast cells, natural killer and innate lymphoid cell precursors in the {{yolk sac}}. We demonstrate a shift in the haemopoietic composition of fetal liver during gestation away from being predominantly erythroid, accompanied by a parallel change in differentiation potential of HSC/MPPs, which we functionally validate. Our integrated map of fetal liver haematopoiesis provides a blueprint for the study of paediatric blood and immune disorders, and a reference for harnessing the therapeutic potential of HSC/MPPs." {{blood}}

	* '''The association between AB blood group and neonatal disease'''{{#pmid:30347622\|PMID30347622}} "Numerous studies have examined the association between ABO blood groups and adult disease states, but very few have studied the neonatal population. The objective of this study was to determine the relationship between AB blood group and the occurrence of common neonatal disorders such as neutropenia at birth, sepsis, respiratory distress syndrome (RDS), intraventricular hemorrhage (IVH), retinopathy of prematurity (ROP), and patent ductus arteriosus (PDA) compared to all other blood groups. ...We hypothesize that the phenotypic expression of A and B antigens, rather than the antigens themselves, in the AB group may reveal an enhanced susceptibility to injury at the endothelial level resulting in an increased risk for disease development."		* '''The association between AB blood group and neonatal disease'''{{#pmid:30347622\|PMID30347622}} "Numerous studies have examined the association between ABO blood groups and adult disease states, but very few have studied the neonatal population. The objective of this study was to determine the relationship between AB blood group and the occurrence of common neonatal disorders such as neutropenia at birth, sepsis, respiratory distress syndrome (RDS), intraventricular hemorrhage (IVH), retinopathy of prematurity (ROP), and patent ductus arteriosus (PDA) compared to all other blood groups. ...We hypothesize that the phenotypic expression of A and B antigens, rather than the antigens themselves, in the AB group may reveal an enhanced susceptibility to injury at the endothelial level resulting in an increased risk for disease development."

	* '''Haematopoietic stem cell induction by somite-derived endothelial cells controlled by meox1'''{{#pmid:25119043\|PMID25119043}} Haematopoietic stem cells (HSCs) are self-renewing stem cells capable of replenishing all blood lineages. In all vertebrate embryos that have been studied, definitive HSCs are generated initially within the dorsal aorta (DA) of the embryonic vasculature by a series of poorly understood inductive events. Previous studies have identified that signalling relayed from adjacent somites coordinates HSC induction, but the nature of this signal has remained elusive. Here we reveal that somite specification of HSCs occurs via the deployment of a specific endothelial precursor population, which arises within a sub-compartment of the zebrafish somite that we have defined as the endotome. Endothelial cells of the endotome are specified within the nascent somite by the activity of the homeobox gene meox1. Specified endotomal cells consequently migrate and colonize the DA, where they induce HSC formation through the deployment of chemokine signalling activated in these cells during endotome formation. Loss of meox1 activity expands the endotome at the expense of a second somitic cell type, the muscle precursors of the dermomyotomal equivalent in zebrafish, the external cell layer. The resulting increase in endotome-derived cells that migrate to colonize the DA generates a dramatic increase in chemokine-dependent HSC induction. This study reveals the molecular basis for a novel somite lineage restriction mechanism and defines a new paradigm in induction of definitive HSCs." [[Stem Cells]]

	* '''Fetal and adult hematopoietic stem cells give rise to distinct T cell lineages in humans'''{{#pmid:21164017\|PMID21164017}} "Our results suggest that fetal and adult T cells are distinct populations that arise from different populations of HSCs that are present at different stages of development. We also provide evidence that the fetal T cell lineage is biased toward immune tolerance. These observations offer a mechanistic explanation for the tolerogenic properties of the developing fetus and for variable degrees of immune responsiveness at birth."
	\|}		\|}
	{\| class="wikitable mw-collapsible mw-collapsed"		{\| class="wikitable mw-collapsible mw-collapsed"
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	\| [[File:Mark_Hill.jpg\|90px\|left]] {{Most_Recent_Refs}}		\| [[File:Mark_Hill.jpg\|90px\|left]] {{Most_Recent_Refs}}

	Search term: [http://www.ncbi.nlm.nih.gov/pubmed/?term=Blood+Embryology ''Blood Embryology'']		Search term: [http://www.ncbi.nlm.nih.gov/pubmed/?term=Blood+Development ''Blood Development''] \| [http://www.ncbi.nlm.nih.gov/pubmed/?term=Blood+Embryology ''Blood Embryology''] \| [http://www.ncbi.nlm.nih.gov/pubmed/?term=Liver+Haematopoiesis ''Liver Haematopoiesis''] \| [http://www.ncbi.nlm.nih.gov/pubmed/?term=Yolk+Sac+Haematopoiesis ''Yolk Sac Haematopoiesis''] \| [http://www.ncbi.nlm.nih.gov/pubmed/?term=Bone+Marrow+Haematopoiesis ''Bone Marrow Haematopoiesis''] \| [http://www.ncbi.nlm.nih.gov/pubmed/?term=Haematopoiesis ''Haematopoiesis'']
	\|}		\|}
	{\| class="wikitable mw-collapsible mw-collapsed"		{\| class="wikitable mw-collapsible mw-collapsed"
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	\|-		\|-
	\| {{older papers}}		\| {{older papers}}
			* '''Haematopoietic stem cell induction by somite-derived endothelial cells controlled by meox1'''{{#pmid:25119043\|PMID25119043}} Haematopoietic stem cells (HSCs) are self-renewing stem cells capable of replenishing all blood lineages. In all vertebrate embryos that have been studied, definitive HSCs are generated initially within the dorsal aorta (DA) of the embryonic vasculature by a series of poorly understood inductive events. Previous studies have identified that signalling relayed from adjacent somites coordinates HSC induction, but the nature of this signal has remained elusive. Here we reveal that somite specification of HSCs occurs via the deployment of a specific endothelial precursor population, which arises within a sub-compartment of the zebrafish somite that we have defined as the endotome. Endothelial cells of the endotome are specified within the nascent somite by the activity of the homeobox gene meox1. Specified endotomal cells consequently migrate and colonize the DA, where they induce HSC formation through the deployment of chemokine signalling activated in these cells during endotome formation. Loss of meox1 activity expands the endotome at the expense of a second somitic cell type, the muscle precursors of the dermomyotomal equivalent in zebrafish, the external cell layer. The resulting increase in endotome-derived cells that migrate to colonize the DA generates a dramatic increase in chemokine-dependent HSC induction. This study reveals the molecular basis for a novel somite lineage restriction mechanism and defines a new paradigm in induction of definitive HSCs." {{Stem cells}}

			* '''Fetal and adult hematopoietic stem cells give rise to distinct T cell lineages in humans'''{{#pmid:21164017\|PMID21164017}} "Our results suggest that fetal and adult T cells are distinct populations that arise from different populations of HSCs that are present at different stages of development. We also provide evidence that the fetal T cell lineage is biased toward immune tolerance. These observations offer a mechanistic explanation for the tolerogenic properties of the developing fetus and for variable degrees of immune responsiveness at birth."

	* '''Runx1 is required for the endothelial to haematopoietic cell transition'''{{#pmid:19129762\|PMID19129762}} "It is thought that HSCs emerge from vascular endothelial cells through the formation of intra-arterial clusters and that Runx1 functions during the transition from 'haemogenic endothelium' to Haematopoietic stem cells (HSCs). ...Collectively these data show that Runx1 function is essential in endothelial cells for haematopoietic progenitor and HSC formation from the vasculature, but its requirement ends once or before Vav is expressed." (More? OMIM - [http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=151385 Runt-Related Transcription Factor 1 - Runx1] )		* '''Runx1 is required for the endothelial to haematopoietic cell transition'''{{#pmid:19129762\|PMID19129762}} "It is thought that HSCs emerge from vascular endothelial cells through the formation of intra-arterial clusters and that Runx1 functions during the transition from 'haemogenic endothelium' to Haematopoietic stem cells (HSCs). ...Collectively these data show that Runx1 function is essential in endothelial cells for haematopoietic progenitor and HSC formation from the vasculature, but its requirement ends once or before Vav is expressed." (More? OMIM - [http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=151385 Runt-Related Transcription Factor 1 - Runx1] )

Z8600021 at 00:41, 14 February 2019

2019-02-14T00:41:50Z

← Older revision		Revision as of 11:41, 14 February 2019
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	===Articles===		===Articles===


	{{#pmid:25634517}}		{{#pmid:25634517}}

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	{{#pmid:10529424}}		{{#pmid:10529424}}

			{{#pmid:3703624}}

	===Search PubMed===		===Search PubMed===

Z8600021 at 00:39, 14 February 2019

2019-02-14T00:39:24Z

← Older revision		Revision as of 11:39, 14 February 2019
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	White blood cells are a family of many different cell types that mediate many different functions including: immune defence, clotting, bacteria and virus destruction and cell debris scavenging. These cells are not formed in the initial embryonic blood, mainly nucleated erythroid cells RBCs with small numbers of macrophages and megakaryocytes. White blood cells begin to develop in the early fetal period.{{#pmid:29436479\|PMID29436479}} The fetal and neonatal neutraphils differ from adult neutrophils, based upon their maturation and environmental factors. These cells will form the majority of granulocyte precursors within the bone marrow.		White blood cells are a family of many different cell types that mediate many different functions including: immune defence, clotting, bacteria and virus destruction and cell debris scavenging. These cells are not formed in the initial embryonic blood, mainly nucleated erythroid cells RBCs with small numbers of macrophages and megakaryocytes. White blood cells begin to develop in the early fetal period.{{#pmid:29436479\|PMID29436479}} The fetal and neonatal neutraphils differ from adult neutrophils, based upon their maturation and environmental factors. These cells will form the majority of granulocyte precursors within the bone marrow.

	~~A large~~ fetal cord blood study{{#pmid:25634517\|PMID25634517}} showed no gender differences in counts of white blood cells, neutrophils, monocytes, eosinophils and lymphocytes that all increased. Platelets also increased from 30-35 weeks. The percentages of lymphocytes and monocytes decreased overall though, due to the large increase in the absolute neutrophil count.
			Second trimester ({{GA}} 15-21) fetal blood study{{#pmid:4088972\|PMID4088972}} showed significant changes in erythropoietic system though little change in myeloid series, with no significant increase or decrease in numbers. The only exception was eosinophils and basophils which increase significantly with gestational age while the platelet count remains constant.

			Third trimester fetal cord blood study{{#pmid:25634517\|PMID25634517}} showed no gender differences in counts of white blood cells, neutrophils, monocytes, eosinophils and lymphocytes that all increased. Platelets also increased from 30-35 weeks. The percentages of lymphocytes and monocytes decreased overall though, due to the large increase in the absolute neutrophil count.

Z8600021 at 00:27, 14 February 2019

2019-02-14T00:27:34Z

← Older revision		Revision as of 11:27, 14 February 2019
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	== White Blood Cells ==		== White Blood Cells ==

	White blood cells are a family of many different cell types that mediate many different functions including: immune defence, clotting, bacteria and virus destruction and cell debris scavenging. These cells are not formed in the initial embryonic blood, mainly nucleated erythroid cells RBCs with small numbers of macrophages and megakaryocytes. White blood cells begin to develop in the early fetal period.{{#pmid:29436479\|PMID29436479}} The fetal and neonatal neutraphils differ from adult neutrophils, based upon their maturation and environmental factors. These cells will form the majority of granulocyte precursors within the bone marrow.		White blood cells are a family of many different cell types that mediate many different functions including: immune defence, clotting, bacteria and virus destruction and cell debris scavenging. These cells are not formed in the initial embryonic blood, mainly nucleated erythroid cells RBCs with small numbers of macrophages and megakaryocytes. White blood cells begin to develop in the early fetal period.{{#pmid:29436479\|PMID29436479}} The fetal and neonatal neutraphils differ from adult neutrophils, based upon their maturation and environmental factors. These cells will form the majority of granulocyte precursors within the bone marrow.

			A large fetal cord blood study{{#pmid:25634517\|PMID25634517}} showed no gender differences in counts of white blood cells, neutrophils, monocytes, eosinophils and lymphocytes that all increased. Platelets also increased from 30-35 weeks. The percentages of lymphocytes and monocytes decreased overall though, due to the large increase in the absolute neutrophil count.

Z8600021 at 00:11, 14 February 2019

2019-02-14T00:11:42Z

← Older revision		Revision as of 11:11, 14 February 2019
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	===Articles===		===Articles===
			{{#pmid:25634517}}

	{{#pmid:24041595}}		{{#pmid:24041595}}

← Older revision		Revision as of 11:39, 14 February 2019
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	White blood cells are a family of many different cell types that mediate many different functions including: immune defence, clotting, bacteria and virus destruction and cell debris scavenging. These cells are not formed in the initial embryonic blood, mainly nucleated erythroid cells RBCs with small numbers of macrophages and megakaryocytes. White blood cells begin to develop in the early fetal period.{{#pmid:29436479\|PMID29436479}} The fetal and neonatal neutraphils differ from adult neutrophils, based upon their maturation and environmental factors. These cells will form the majority of granulocyte precursors within the bone marrow.		White blood cells are a family of many different cell types that mediate many different functions including: immune defence, clotting, bacteria and virus destruction and cell debris scavenging. These cells are not formed in the initial embryonic blood, mainly nucleated erythroid cells RBCs with small numbers of macrophages and megakaryocytes. White blood cells begin to develop in the early fetal period.{{#pmid:29436479\|PMID29436479}} The fetal and neonatal neutraphils differ from adult neutrophils, based upon their maturation and environmental factors. These cells will form the majority of granulocyte precursors within the bone marrow.

	~~A large~~ fetal cord blood study{{#pmid:25634517\|PMID25634517}} showed no gender differences in counts of white blood cells, neutrophils, monocytes, eosinophils and lymphocytes that all increased. Platelets also increased from 30-35 weeks. The percentages of lymphocytes and monocytes decreased overall though, due to the large increase in the absolute neutrophil count.
			Second trimester ({{GA}} 15-21) fetal blood study{{#pmid:4088972\|PMID4088972}} showed significant changes in erythropoietic system though little change in myeloid series, with no significant increase or decrease in numbers. The only exception was eosinophils and basophils which increase significantly with gestational age while the platelet count remains constant.

			Third trimester fetal cord blood study{{#pmid:25634517\|PMID25634517}} showed no gender differences in counts of white blood cells, neutrophils, monocytes, eosinophils and lymphocytes that all increased. Platelets also increased from 30-35 weeks. The percentages of lymphocytes and monocytes decreased overall though, due to the large increase in the absolute neutrophil count.