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Probes for INS

ACD can configure probes for the various manual and automated assays for INS for RNAscope Assay, or for Basescope Assay compatible for your species of interest.

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Medial preoptic area in mice is capable of mediating sexually dimorphic behaviors regardless of gender

Nat Commun.

2018 Jan 18

Wei YC, Wang SR, Jiao ZL, Zhang W, Lin JK, Li XY, Li SS, Zhang X, Xu XH.
PMID: 29348568 | DOI: 10.1038/s41467-017-02648-0

The medial preoptic area (mPOA) differs between males and females in nearly all species examined to date, including humans. Here, using fiber photometry recordings of Ca2+ transients in freely behaving mice, we show ramping activities in the mPOA that precede and correlate with sexually dimorphic display of male-typical mounting and female-typical pup retrieval. Strikingly, optogenetic stimulation of the mPOA elicits similar display of mounting and pup retrieval in both males and females. Furthermore, by means of recording, ablation, optogenetic activation, and inhibition, we show mPOA neurons expressing estrogen receptor alpha (Esr1) are essential for the sexually biased display of these behaviors. Together, these results underscore the shared layout of the brain that can mediate sex-specific behaviors in both male and female mice and provide an important functional frame to decode neural mechanisms governing sexually dimorphic behaviors in the future.

Quanty-cFOS, a Novel ImageJ/Fiji Algorithm for Automated Counting of Immunoreactive Cells in Tissue Sections

Cells

2023 Feb 23

Beretta, C;Liu, S;Stegemann, A;Gan, Z;Wang, L;Tan, L;Kuner, R;
| DOI: 10.3390/cells12050704

Analysis of neural encoding and plasticity processes frequently relies on studying spatial patterns of activity-induced immediate early genes’ expression, such as c-fos. Quantitatively analyzing the numbers of cells expressing the Fos protein or c-fos mRNA is a major challenge owing to large human bias, subjectivity and variability in baseline and activity-induced expression. Here, we describe a novel open-source ImageJ/Fiji tool, called ‘Quanty-cFOS’, with an easy-to-use, streamlined pipeline for the automated or semi-automated counting of cells positive for the Fos protein and/or c-fos mRNA on images derived from tissue sections. The algorithms compute the intensity cutoff for positive cells on a user-specified number of images and apply this on all the images to process. This allows for the overcoming of variations in the data and the deriving of cell counts registered to specific brain areas in a highly time-efficient and reliable manner. We validated the tool using data from brain sections in response to somatosensory stimuli in a user-interactive manner. Here, we demonstrate the application of the tool in a step-by-step manner, with video tutorials, making it easy for novice users to implement. Quanty-cFOS facilitates a rapid, accurate and unbiased spatial mapping of neural activity and can also be easily extended to count other types of labelled cells.
Combination of levo-tetrahydropalmatine and low dose naltrexone: a promising treatment for the prevention of cocaine relapse

J Pharmacol Exp Ther.

2016 Feb 22

Sushchyk SA, Xi ZX, Wang JB.
PMID: 26903543 | DOI: -

Relapse to drug use is often cited as the major obstacle in overcoming a drug addiction. While relapse can occurs for a myriad of reasons it is well established the complex neuroadaptations, which occur over the course of addiction, are major factors. Cocaine, as a potent dopamine transporter blocker, specifically induces alterations in the dopaminergic as well as other monoaminergic neurotransmissions, which lead to cocaine abuse and dependence. Evidence also suggests that adaptations in the endogenous opioids play important roles in pathophysiology of cocaine addiction. Following this evidence, we investigated a combination medication, levo-tetrahydropalmatine (l-THP) and low dose naltrexone (LDN), targeting primarily dopaminergic and endogenous opioid systems as a cocaine relapse prevention treatment. In the present study Wistar rats were used to assess the effects of l-THP and LDN on cocaine self-administration, drug-seeking behavior during cocaine reinstatement, spontaneous locomotion, and effects on the endogenous opioid system. We determine the combination of l-THP and LDN reduces drug-seeking behavior during reinstatement potently than l-THP alone. Additionally, the combination of l-THP and LDN attenuates the sedative locomotor effect induced by l-THP. Furthermore, we revealed that treatment with the combination of l-THP and LDN has an upregulatory effect on both plasma β-endorphin and hypothalamic POMC that was not observed in l-THP-treated groups. These results suggest that the combination of l-THP and LDN has great potential as an effective and well-tolerated medication for cocaine relapse prevention.

Single-cell molecular and functional mapping of POMC neurons in obesity: a multi-modal approach

Endocrine Abstracts

2022 May 07

Leon, S;Simon, V;Lee, T;Clark, S;Dupuy, N;Le, F;Fioramonti, X;Cota, D;Quarta, C;
| DOI: 10.1530/endoabs.81.oc10.1

The brain plays a crucial role in maintaining the bodys energy needs, a process involving the activity of a group of hypothalamic neurons that express the neuropeptidergic marker pro-opiomelanocortin (POMC). POMC neuronal dysfunction can cause obesity and its associated metabolic sequelae. However, this population of neurons is highly diverse at a molecular and functional level, and whether or not such heterogeneity is implicated in disease establishment or progression has yet to be elucidated. Here, using a lineage-tracing approach in combination with histological and electrophysiological tools, we have characterized POMC neuronal cells at a single-cell resolution in control of lean and diet-induced obese (DIO) mice. Thanks to this genetic strategy, we traced with a reporter protein POMC neurons in adult mice, thus studying these neuronal cells independently from the expression of their main marker POMC. Different histological techniques, including immunohistochemistry, fluorescent in-situ hybridization, and RNAscope, have been used to cluster genetically traced POMC neuronal cells based on their expression of the main marker POMC. These different approaches consistently allowed the identification of a previously uncharacterized sub-population that expresses negligible POMC mRNA and protein levels, which we named Ghost-POMC neurons. We also observed that Ghost-POMC neurons are insensitive to acute nutritional cues (fasting and refeeding) relative to classic POMC positive neurons. Intriguingly, DIO mice presented an increased number of Ghost-POMC neurons relative to control animals. Furthermore, we developed an approach that combines whole-cell patch-clamp of traced POMC neurons with the subsequent molecular profiling of the patched cell by single-cell qPCR. Thanks to this approach, we observed that DIO leads to electrical alterations only in a fraction of POMC neurons expressing undetectable levels of POMC mRNA, which is reminiscent of the Ghost population previously identified by histological techniques. Thus, Ghost-POMC neurons might constitute a novel subpopulation of POMC neurons that undergo dysfunction in response to prolonged dietary cues, perhaps contributing to obesity establishment or progression.
The Orexigenic Force of Olfactory Palatable Food Cues in Rats

Nutrients

2021 Sep 03

Peris-Sampedro, F;Stoltenborg, I;Le May, MV;Sole-Navais, P;Adan, RAH;Dickson, SL;
PMID: 34578979 | DOI: 10.3390/nu13093101

Environmental cues recalling palatable foods motivate eating beyond metabolic need, yet the timing of this response and whether it can develop towards a less palatable but readily available food remain elusive. Increasing evidence indicates that external stimuli in the olfactory modality communicate with the major hub in the feeding neurocircuitry, namely the hypothalamic arcuate nucleus (Arc), but the neural substrates involved have been only partially uncovered. By means of a home-cage hidden palatable food paradigm, aiming to mimic ubiquitous exposure to olfactory food cues in Western societies, we investigated whether the latter could drive the overeating of plain chow in non-food-deprived male rats and explored the neural mechanisms involved, including the possible engagement of the orexigenic ghrelin system. The olfactory detection of a familiar, palatable food impacted upon meal patterns, by increasing meal frequency, to cause the persistent overconsumption of chow. In line with the orexigenic response observed, sensing the palatable food in the environment stimulated food-seeking and risk-taking behavior, which are intrinsic components of food acquisition, and caused active ghrelin release. Our results suggest that olfactory food cues recruited intermingled populations of cells embedded within the feeding circuitry within the Arc, including, notably, those containing the ghrelin receptor. These data demonstrate the leverage of ubiquitous food cues, not only for palatable food searching, but also to powerfully drive food consumption in ways that resonate with heightened hunger, for which the orexigenic ghrelin system is implicated.
Antagonistic modulation of NPY/AgRP and POMC neurons in the arcuate nucleus by noradrenalin.

Elife.

2017 Jun 20

Paeger L, Karakasilioti I, Altmüller J, Frommolt P, Brüning J, Kloppenburg P.
PMID: 28632132 | DOI: 10.7554/eLife.25770

In the arcuate nucleus of the hypothalamus (ARH) satiety signaling (anorexigenic) pro-opiomelanocortin (POMC)-expressing and hunger signaling (orexigenic) agouti-related peptide (AgRP)-expressing neurons are key components of the neuronal circuits that control food intake and energy homeostasis. Here, we assessed whether the catecholamine noradrenalin directly modulates the activity of these neurons in mice. Perforated patch clamp recordings showed that noradrenalin changes the activity of these functionally antagonistic neurons in opposite ways, increasing the activity of the orexigenic NPY/AgRP neurons and decreasing the activity of the anorexigenic POMC neurons. Cell type-specific transcriptomics and pharmacological experiments revealed that the opposing effect on these neurons is mediated by the activation of excitatory α1A - and β- adrenergic receptors in NPY/AgRP neurons, while POMC neurons are inhibited via α2A - adrenergic receptors. Thus, the coordinated differential modulation of the key hypothalamic neurons in control of energy homeostasis assigns noradrenalin an important role to promote feeding.

The endoplasmic reticulum stress-autophagy pathway controls hypothalamic development and energy balance regulation in leptin-deficient neonates

Nat Commun

2020 Apr 20

Park S, Aintablian A, Coupe B, Bouret SG
PMID: 32313051 | DOI: 10.1038/s41467-020-15624-y

Obesity is associated with the activation of cellular responses, such as endoplasmic reticulum (ER) stress. Here, we show that leptin-deficient ob/ob mice display elevated hypothalamic ER stress as early as postnatal day 10, i.e., prior to the development of obesity in this mouse model. Neonatal treatment of ob/ob mice with the ER stress-relieving drug tauroursodeoxycholic acid (TUDCA) causes long-term amelioration of body weight, food intake, glucose homeostasis, and pro-opiomelanocortin (POMC) projections. Cells exposed to ER stress often activate autophagy. Accordingly, we report that in vitro induction of ER stress and neonatal leptin deficiency in vivo activate hypothalamic autophagy-related genes. Furthermore, genetic deletion of autophagy in pro-opiomelanocortin neurons of ob/ob mice worsens their glucose homeostasis, adiposity, hyperphagia, and POMC neuronal projections, all of which are ameliorated with neonatal TUDCA treatment. Together, our data highlight the importance of early life ER stress-autophagy pathway in influencing hypothalamic circuits and metabolic regulation
Trigeminal nerve stimulation restores hippocampal dopamine deficiency to promote cognitive recovery in traumatic brain injury

Progress in neurobiology

2023 Jun 01

Xu, J;Wu, S;Huo, L;Zhang, Q;Liu, L;Ye, Z;Cao, J;Ma, H;Shang, C;Ma, C;
PMID: 37270025 | DOI: 10.1016/j.pneurobio.2023.102477

Cognitive impairment (CI) is a common neurological disease resulting from traumatic brain injury (TBI). Trigeminal nerve stimulation (TNS) is an emerging, non-invasive, and effective neuromodulation therapy especially for patients suffering from brain function disorders. However, the treatment and recovery mechanisms of TNS remain poorly understood. By using combined advanced technologies, we revealed here that the neuroprotective potential of TNS to improve CI caused by TBI. The study results found that 40Hz TNS treatment has the ability to improve CI in TBI mice and communicates with central nervous system via the trigeminal ganglion (TG). Transsynaptic virus experiments revealed that TG is connected to the hippocampus (HPC) through the corticotropin-releasing hormone (CRH) neurons of paraventricular hypothalamic nucleus (PVN) and the dopamine transporter (DAT) neurons of substantia nigra pars compacta/ventral tegmental area (SNc/VTA). Mechanistically, the data showed that TNS can increase the release of dopamine in the HPC by activating the following neural circuit: TG→CRH+ PVN→DAT+ SNc/VTA → HPC. Bulk RNA sequencing confirmed changes in the expression of dopamine-related genes in the HPC. This work preliminarily explains the efficacy and mechanism of TNS and adds to the increasing evidence demonstrating that nerve stimulation is an effective method to treat neurological diseases. DATA AVAILABILITY: The data that support the findings of this study are available from the corresponding author on reasonable request.
Hypothermia evoked by stimulation of medial preoptic nucleus protects the brain in a mouse model of ischaemia

Nature communications

2022 Nov 12

Zhang, S;Zhang, X;Zhong, H;Li, X;Wu, Y;Ju, J;Liu, B;Zhang, Z;Yan, H;Wang, Y;Song, K;Hou, ST;
PMID: 36371436 | DOI: 10.1038/s41467-022-34735-2

Therapeutic hypothermia at 32-34 °C during or after cerebral ischaemia is neuroprotective. However, peripheral cold sensor-triggered hypothermia is ineffective and evokes vigorous counteractive shivering thermogenesis and complications that are difficult to tolerate in awake patients. Here, we show in mice that deep brain stimulation (DBS) of warm-sensitive neurones (WSNs) in the medial preoptic nucleus (MPN) produces tolerable hypothermia. In contrast to surface cooling-evoked hypothermia, DBS mice exhibit a torpor-like state without counteractive shivering. Like hypothermia evoked by chemogenetic activation of WSNs, DBS in free-moving mice elicits a rapid lowering of the core body temperature to 32-34 °C, which confers significant brain protection and motor function reservation. Mechanistically, activation of WSNs contributes to DBS-evoked hypothermia. Inhibition of WSNs prevents DBS-evoked hypothermia. Maintaining the core body temperature at normothermia during DBS abolishes DBS-mediated brain protection. Thus, the MPN is a DBS target to evoke tolerable therapeutic hypothermia for stroke treatment.
Tissue-specific activation of gene expression by the Synergistic Activation Mediator (SAM) CRISPRa system in mice

Nature communications

2021 May 13

Hunt, C;Hartford, SA;White, D;Pefanis, E;Hanna, T;Herman, C;Wiley, J;Brown, H;Su, Q;Xin, Y;Voronin, D;Nguyen, H;Altarejos, J;Crosby, K;Haines, J;Cancelarich, S;Drummond, M;Moller-Tank, S;Malpass, R;Buckley, J;Del Pilar Molina-Portela, M;Droguett, G;Frendewey, D;Chiao, E;Zambrowicz, B;Gong, G;
PMID: 33986266 | DOI: 10.1038/s41467-021-22932-4

CRISPR-based transcriptional activation is a powerful tool for functional gene interrogation; however, delivery difficulties have limited its applications in vivo. Here, we created a mouse model expressing all components of the CRISPR-Cas9 guide RNA-directed Synergistic Activation Mediator (SAM) from a single transcript that is capable of activating target genes in a tissue-specific manner. We optimized Lipid Nanoparticles and Adeno-Associated Virus guide RNA delivery approaches to achieve expression modulation of one or more genes in vivo. We utilized the SAM mouse model to generate a hypercholesteremia disease state that we could bidirectionally modulate with various guide RNAs. Additionally, we applied SAM to optimize gene expression in a humanized Transthyretin mouse model to recapitulate human expression levels. These results demonstrate that the SAM gene activation platform can facilitate in vivo research and drug discovery.
Quantitative analysis of RNAscope staining for c-fos Expression in Mouse Brain Tissue as a Measure of Neuronal Activation

MethodsX

2021 Apr 01

Cosi, C;Millar, M;Beltran, M;Sherry, L;Gatti-McArthur, S;
| DOI: 10.1016/j.mex.2021.101348

The expression of c-fos mRNA is an indirect marker of neuronal activity. RNAscope ACD Bio RNAscope (now Biotechne) is a proprietary in-situ mRNA detection technology using branched DNA amplification and z paired probes to deliver a robust and specific assay designed primarily for use on formalin fixed paraffin sections [1]. In the present study we adapted this technology to be used in frozen sections to allow quantitative analysis of c-fos gene expression in different mouse brain regions during neuropharmacology studies. The method was applied by Cosi et al. 2021 [2] and the image analysis is described here in details. • The patented RNAscope (ACD Bio) flourescent in-situ hybridisation technology designed primarily for use on formalin fixed paraffin sections was adapted to be used on frozen section from mouse brain. • We carefully controlled sample preparation and handling to maximise mRNA preservation and used the fluorescent properties of the fast Red substrate combined with fluorescent whole slide scanning and image analysis. • A customized algorithm was set up for image analysis • The method developed permitted the quantitative analysis of c-fos expression in specific brain regions from whole sections.
Long Acting Neurotensin Synergizes with Liraglutide to Reverse Obesity Through a Melanocortin-Dependent Pathway.

Diabetes

2019 Apr 01

Ratner C, He Z, Grunddal KV, Skov LJ, Hartmann B, Zhang F, Feuchtinger A, Bjerregaard A, Christoffersen C, Tschöp MH, Finan B, DiMarchi RD, Leinninger GM, Williams KW, Clemmensen C, Holst B.
PMID: 30936142 | DOI: 10.2337/db18-1009

Neurotensin, a gut hormone and neuropeptide, increases in circulation after bariatric surgery in rodents and humans and inhibits food intake in mice. However, its potential to treat obesity and the subsequent metabolic dysfunctions have been difficult to assess owing to its short half-life in vivo Here, we demonstrate that a long acting, pegylated analogue of the neurotensin peptide (P-NT) reduces food intake, body weight and adiposity in diet-induced obese (DIO) mice when administered once daily for 6 days. Strikingly, when P-NT was combined with the GLP-1 mimetic liraglutide the two peptides synergized to reduce food intake and body weight relative to each mono-therapy, without inducing a taste aversion. Further, P-NT and liraglutide co-administration improved glycemia and reduced steatohepatitis. Finally, we show that the melanocortin pathway is central for P-NT-induced anorexia and necessary for the full synergistic effect of P-NT and liraglutide combination-therapy. Overall, our data suggest that P-NT and liraglutide combination-therapy could be an enhanced treatment for obesity with improved tolerability compared to liraglutide mono-therapy.

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Description
sense
Example: Hs-LAG3-sense
Standard probes for RNA detection are in antisense. Sense probe is reverse complent to the corresponding antisense probe.
Intron#
Example: Mm-Htt-intron2
Probe targets the indicated intron in the target gene, commonly used for pre-mRNA detection
Pool/Pan
Example: Hs-CD3-pool (Hs-CD3D, Hs-CD3E, Hs-CD3G)
A mixture of multiple probe sets targeting multiple genes or transcripts
No-XSp
Example: Hs-PDGFB-No-XMm
Does not cross detect with the species (Sp)
XSp
Example: Rn-Pde9a-XMm
designed to cross detect with the species (Sp)
O#
Example: Mm-Islr-O1
Alternative design targeting different regions of the same transcript or isoforms
CDS
Example: Hs-SLC31A-CDS
Probe targets the protein-coding sequence only
EnEmProbe targets exons n and m
En-EmProbe targets region from exon n to exon m
Retired Nomenclature
tvn
Example: Hs-LEPR-tv1
Designed to target transcript variant n
ORF
Example: Hs-ACVRL1-ORF
Probe targets open reading frame
UTR
Example: Hs-HTT-UTR-C3
Probe targets the untranslated region (non-protein-coding region) only
5UTR
Example: Hs-GNRHR-5UTR
Probe targets the 5' untranslated region only
3UTR
Example: Rn-Npy1r-3UTR
Probe targets the 3' untranslated region only
Pan
Example: Pool
A mixture of multiple probe sets targeting multiple genes or transcripts

Enabling research, drug development (CDx) and diagnostics

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