scholarly journals VMH neurons under the magnifying glass

Endocrinology ◽  
2021 ◽  
Author(s):  
Tansi Khodai ◽  
Simon M Luckman

Abstract The ventromedial nucleus of the hypothalamus (VMH) is a complex brain structure that is integral to many neuroendocrine functions, including glucose regulation, thermogenesis, appetitive, social and sexual behaviours. As such, it is of little surprise that the nucleus is under intensive investigation to decipher the mechanisms which underlie these diverse roles. Developments in genetic and investigative tools, for example the targeting of steroidogenic factor-1-expressing neurons, have allowed us to take a closer look at the VMH, its connections and how it affects competing behaviours. In the current review, we aim to integrate recent findings into the literature and contemplate the conclusions that can be drawn.

2021 ◽  
Vol 51 (3) ◽  
pp. 346-349
Author(s):  
K. Yu. Moiseev ◽  
A. A. Spirichev ◽  
P. A. Vishnyakova ◽  
A. D. Nozdrachev ◽  
P. M. Masliukov

2012 ◽  
Vol 107 (1) ◽  
pp. 42-49 ◽  
Author(s):  
Young-Hwan Jo

Output from steroidogenic factor-1 (SF-1) neurons in the ventromedial nucleus of the hypothalamus (VMH) is anorexigenic. SF-1 neurons express brain-derived neurotrophic factor (BDNF) that contributes to the regulation of food intake and body weight. Here I show that regulation of GABAergic inputs onto SF-1 neurons by endogenous BDNF determines the anorexigenic outcome from the VMH. Single-cell RT-PCR analysis reveals that one-third of SF-1 neurons express BDNF and that only a subset of BDNF-expressing SF-1 neurons coexpresses the melanocortin receptor type 4. Whole cell patch-clamp analysis of SF-1 neurons in the VMH shows that exogenous BDNF significantly increases the frequency of spontaneous GABAergic inhibitory postsynaptic currents (sIPSCs). This enhancement of GABA drive readily decreases the excitability of SF-1 neurons. However, treatment with BDNF has no significant effect on the frequency of TTX-independent GABAergic IPSCs. Moreover, TrkB receptors are not localized at the postsynaptic sites of GABAergic synapses on SF-1 neurons as there is no change in the amplitude of miniature IPSCs in the presence of BDNF. Dual patch-clamp recordings in mouse hypothalamic slices reveal that stimulation of one SF-1 neuron induces an increase in sIPSC frequency onto the neighboring SF-1 neuron. More importantly, this effect is blocked by a tyrosine kinase inhibitor. Hence, this increased GABA drive onto SF-1 neurons may, in part, explain the cellular mechanisms that mediate the anorexigenic effects of BDNF.


PLoS ONE ◽  
2016 ◽  
Vol 11 (9) ◽  
pp. e0162352 ◽  
Author(s):  
Ann W. Kinyua ◽  
Dong Joo Yang ◽  
Inik Chang ◽  
Ki Woo Kim

2004 ◽  
Vol 60 (4) ◽  
pp. 424-436 ◽  
Author(s):  
Aline M. Davis ◽  
Marianne L. Seney ◽  
Nancy R. Stallings ◽  
Liping Zhao ◽  
Keith L. Parker ◽  
...  

2019 ◽  
Vol 42 ◽  
Author(s):  
Don Ross

AbstractUse of network models to identify causal structure typically blocks reduction across the sciences. Entanglement of mental processes with environmental and intentional relationships, as Borsboom et al. argue, makes reduction of psychology to neuroscience particularly implausible. However, in psychiatry, a mental disorder can involve no brain disorder at all, even when the former crucially depends on aspects of brain structure. Gambling addiction constitutes an example.


2019 ◽  
Vol 42 ◽  
Author(s):  
Charles R. Gallistel

Abstract Shannon's theory lays the foundation for understanding the flow of information from world into brain: There must be a set of possible messages. Brain structure determines what they are. Many messages convey quantitative facts (distances, directions, durations, etc.). It is impossible to consider how neural tissue processes these numbers without first considering how it encodes them.


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