scholarly journals Role of miRNA-9 in Brain Development

2016 ◽  
Vol 10 ◽  
pp. JEN.S32843 ◽  
Author(s):  
Balachandar Radhakrishnan ◽  
A. Alwin Prem Anand
Keyword(s):  
Spinal Cord ◽  
Brain Development ◽  
Spatiotemporal Pattern ◽  
Marker Genes ◽  
Neuron Development ◽  
Neuronal Progenitor ◽  
Vertebrate Brain ◽  
Small Regulatory Rnas ◽  
Her Genes

MicroRNAs (miRNAs) are a class of small regulatory RNAs involved in gene regulation. The regulation is effected by either translational inhibition or transcriptional silencing. In vertebrates, the importance of miRNA in development was discovered from mice and zebrafish dicer knockouts. The miRNA-9 (miR-9) is one of the most highly expressed miRNAs in the early and adult vertebrate brain. It has diverse functions within the developing vertebrate brain. In this article, the role of miR-9 in the developing forebrain (telencephalon and diencephalon), midbrain, hindbrain, and spinal cord of vertebrate species is highlighted. In the forebrain, miR-9 is necessary for the proper development of dorsoventral telencephalon by targeting marker genes expressed in the telencephalon. It regulates proliferation in telencephalon by regulating Foxg1, Pax6, Gsh2, and Meis2 genes. The feedback loop regulation between miR-9 and Nr2e1/Tlx helps in neuronal migration and differentiation. Targeting Foxp1 and Foxp2, and Map1b by miR-9 regulates the radial migration of neurons and axonal development. In the organizers, miR-9 is inversely regulated by hairy1 and Fgf8 to maintain zona limitans interthalamica and midbrain-hindbrain boundary (MHB). It maintains the MHB by inhibiting Fgf signaling genes and is involved in the neurogenesis of the midbrain-hindbrain by regulating Her genes. In the hindbrain, miR-9 modulates progenitor proliferation and differentiation by regulating Her genes and Elav3. In the spinal cord, miR-9 modulates the regulation of Foxp1 and Onecut1 for motor neuron development. In the forebrain, midbrain, and hindbrain, miR-9 is necessary for proper neuronal progenitor maintenance, neurogenesis, and differentiation. In vertebrate brain development, miR-9 is involved in regulating several region-specific genes in a spatiotemporal pattern.

A scientific research study on the management of Manyasthamba (Cervical Spondylosis) with Nasya and Nasapana

2019 ◽  
Vol 4 (04) ◽  
Author(s):  
Unnikrishnan V S ◽  
Prashanth A S ◽  
Madhusudan Kulkarni
Keyword(s):  
Spinal Cord ◽  
Clinical Data ◽  
Food Habits ◽  
Cervical Spondylosis ◽  
Research Study ◽  
Weight Bearing ◽  
Scientific Research ◽  
Modern Era ◽  
Treatment Aspect

The science of life Ayurveda, not only deals with the prevention of diseases by maintaining health but also with the alleviation of diseases. In this ultra modern era due to change in lifestyles, sedentary works and food habits, people are unable to follow the Dinacharya and Ritucharya as explained in the classics, which may lead to different diseases. Due to improper postural habits, weight bearing and other unwholesome diets and habits there are higher the chances of discomfort and disease pertaining to spinal cord. Manyasthambha is one such condition that disturbs a big population due to today’s alterations in lifestyle. Here an effort is made to study and understand the role of Nasya Karma, Nasaapana and Shamanaushadhi like Vyoshadi Guggulu in the treatment aspect of this disease. Nasya Karma and Nasaapana provided highly significant results in all the symptoms of Manyasthambha. As per the clinical data, ‘Nasaapana is found to be more effective than Nasya Karma’. So it can be concluded that better results can be obtained with Shaddharana Yoga as Amapachana, Nasaapana with Mashabaladi Kwatha followed by Vyoshadi Guggulu as Shamanoushadhi.

scholarly journals Crayfish hemocytes develop along the granular cell lineage

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Fang Li ◽  
Zaichao Zheng ◽  
Hongyu Li ◽  
Rongrong Fu ◽  
Limei Xu ◽  
...  
Keyword(s):  
Developmental Stages ◽  
Cell Lineage ◽  
Granular Cell ◽  
Marker Genes ◽  
Hematopoietic Tissue ◽  
Differentiated Cells ◽  
Stage Of Development ◽  
Almost All ◽  
Relationship Of

AbstractDespite the central role of hemocytes in crustacean immunity, the process of hemocyte differentiation and maturation remains unclear. In some decapods, it has been proposed that the two main types of hemocytes, granular cells (GCs) and semigranular cells (SGCs), differentiate along separate lineages. However, our current findings challenge this model. By tracking newly produced hemocytes and transplanted cells, we demonstrate that almost all the circulating hemocytes of crayfish belong to the GC lineage. SGCs and GCs may represent hemocytes of different developmental stages rather than two types of fully differentiated cells. Hemocyte precursors produced by progenitor cells differentiate in the hematopoietic tissue (HPT) for 3 ~ 4 days. Immature hemocytes are released from HPT in the form of SGCs and take 1 ~ 3 months to mature in the circulation. GCs represent the terminal stage of development. They can survive for as long as 2 months. The changes in the expression pattern of marker genes during GC differentiation support our conclusions. Further analysis of hemocyte phagocytosis indicates the existence of functionally different subpopulations. These findings may reshape our understanding of crustacean hematopoiesis and may lead to reconsideration of the roles and relationship of circulating hemocytes.

scholarly journals Role of melatonin in the dynamics of acute spinal cord injury in rats

2021 ◽  
Author(s):  
Jiaqi Bi ◽  
Jianxiong Shen ◽  
Chong Chen ◽  
Zheng Li ◽  
Haining Tan ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Acute Spinal Cord Injury ◽  
Cord Injury

scholarly journals Neuroplacentology in congenital heart disease: placental connections to neurodevelopmental outcomes

2021 ◽  
Author(s):  
Rachel L. Leon ◽  
Imran N. Mir ◽  
Christina L. Herrera ◽  
Kavita Sharma ◽  
Catherine Y. Spong ◽  
...  
Keyword(s):  
Brain Development ◽  
Congenital Heart ◽  
Fetal Brain ◽  
In Utero ◽  
Structure And Function ◽  
Brain Growth ◽  
Neurodevelopmental Outcomes ◽  
Fetal Brain Development ◽  
And Function

Abstract Children with congenital heart disease (CHD) are living longer due to effective medical and surgical management. However, the majority have neurodevelopmental delays or disorders. The role of the placenta in fetal brain development is unclear and is the focus of an emerging field known as neuroplacentology. In this review, we summarize neurodevelopmental outcomes in CHD and their brain imaging correlates both in utero and postnatally. We review differences in the structure and function of the placenta in pregnancies complicated by fetal CHD and introduce the concept of a placental inefficiency phenotype that occurs in severe forms of fetal CHD, characterized by a myriad of pathologies. We propose that in CHD placental dysfunction contributes to decreased fetal cerebral oxygen delivery resulting in poor brain growth, brain abnormalities, and impaired neurodevelopment. We conclude the review with key areas for future research in neuroplacentology in the fetal CHD population, including (1) differences in structure and function of the CHD placenta, (2) modifiable and nonmodifiable factors that impact the hemodynamic balance between placental and cerebral circulations, (3) interventions to improve placental function and protect brain development in utero, and (4) the role of genetic and epigenetic influences on the placenta–heart–brain connection. Impact Neuroplacentology seeks to understand placental connections to fetal brain development. In fetuses with CHD, brain growth abnormalities begin in utero. Placental microstructure as well as perfusion and function are abnormal in fetal CHD.

Sign in / Sign up

Export Citation Format

Share Document