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Anti-Mouse IgG (H+L), rat adsorbed, made in horse antibody

RRID:AB_2336180

Antibody ID

AB_2336180

Target Antigen

IgG mouse

Proper Citation

(Vector Laboratories Cat# BA-2001, RRID:AB_2336180)

Clonality

unknown

Comments

Biotinylated

Host Organism

horse

Vendor

Vector Laboratories

Sensitivity and specificity of phospho-Ser129 α-synuclein monoclonal antibodies.

  • Delic V
  • J. Comp. Neurol.
  • 2018 Aug 15

Literature context:


Abstract:

α-Synuclein (α-syn) is an abundant presynaptic protein that is the primary constituent of inclusions that define Lewy body diseases (LBDs). In these inclusions, α-syn is phosphorylated at the serine-129 residue. Antibodies directed to this phosphorylation site are used to measure inclusion abundance and stage disease progression in preclinical models as well as in postmortem tissues in LBDs. While it is critical to reliably identify inclusions, phospho-specific antibodies often cross-react with nonspecific antigens. Four commercially available monoclonal antibodies, two from rabbits (clones EP1536Y and MJF-R13) and two from mice (81a and pSyn#64), have been the most widely used in detecting pS129-α-syn inclusions. Here, we systematically evaluated these antibodies in brain sections and protein lysates from rats and mice. All antibodies detected pS129-α-syn inclusions in the brain that were induced by preformed α-syn fibrils in wild-type rats and mice. Antibody titrations revealed that clones EP1536Y and 81a comparably labeled inclusions in both the perikarya and neuronal processes in contrast to clones MJF-R13 and pSyn#64 that incompletely labeled inclusions at various antibody concentrations. Except for EP1536Y, the clones produced nonspecific diffuse neuropil labeling in α-syn knockout mice as well as mice and rats injected with monomeric α-syn, with some nonspecific staining titrating with pS129-α-syn inclusions. By immunoblot, all the clones cross-reacted with proteins other than α-syn, warranting caution in interpretations of specificity. Clone EP1536Y uniquely and robustly detected endogenous pS129-α-syn in highly soluble protein fractions from the mouse brain. In summary, EP1536Y had the highest sensitivity and specificity for detecting pS129-α-syn.

Funding information:
  • NIGMS NIH HHS - GM08347(United States)
  • NINDS NIH HHS - P20 NS092530()
  • NINDS NIH HHS - R01 NS064934()
  • NINDS NIH HHS - R21 NS097643()
  • NINDS NIH HHS - R33 NS097643()

Regulation of Epithelial Plasticity Determines Metastatic Organotropism in Pancreatic Cancer.

  • Reichert M
  • Dev. Cell
  • 2018 Jun 18

Literature context:


Abstract:

The regulation of metastatic organotropism in pancreatic ductal a denocarcinoma (PDAC) remains poorly understood. We demonstrate, using multiple mouse models, that liver and lung metastatic organotropism is dependent upon p120catenin (p120ctn)-mediated epithelial identity. Mono-allelic p120ctn loss accelerates KrasG12D-driven pancreatic cancer formation and liver metastasis. Importantly, one p120ctn allele is sufficient for E-CADHERIN-mediated cell adhesion. By contrast, cells with bi-allelic p120ctn loss demonstrate marked lung organotropism; however, rescue with p120ctn isoform 1A restores liver metastasis. In a p120ctn-independent PDAC model, mosaic loss of E-CADHERIN expression reveals selective pressure for E-CADHERIN-positive liver metastasis and E-CADHERIN-negative lung metastasis. Furthermore, human PDAC and liver metastases support the premise that liver metastases exhibit predominantly epithelial characteristics. RNA-seq demonstrates differential induction of pathways associated with metastasis and epithelial-to-mesenchymal transition in p120ctn-deficient versus p120ctn-wild-type cells. Taken together, P120CTN and E-CADHERIN mediated epithelial plasticity is an addition to the conceptual framework underlying metastatic organotropism in pancreatic cancer.

Funding information:
  • NCI NIH HHS - F30 CA180601()
  • NCI NIH HHS - F32 CA221094()
  • NIDDK NIH HHS - P30 DK050306()
  • NIDDK NIH HHS - R01 DK060694()
  • NIDDK NIH HHS - R21DK090778(United States)

The cellular prion protein promotes olfactory sensory neuron survival and axon targeting during adult neurogenesis.

  • Parrie LE
  • Dev. Biol.
  • 2018 Jun 1

Literature context:


Abstract:

The cellular prion protein (PrPC) has been associated with diverse biological processes including cell signaling, neurogenesis, and neuroprotection, but its physiological function(s) remain ambiguous. Here we determine the role of PrPC in adult neurogenesis using the olfactory system model in transgenic mice. Olfactory sensory neurons (OSNs) within the olfactory sensory epithelium (OSE) undergo neurogenesis, integration, and turnover even into adulthood. The neurogenic processes of proliferation, differentiation/maturation, and axon targeting were evaluated in wild type, PrP-overexpressing, and PrP-null transgenic mice. Our results indicate that PrPC plays a role in maintaining mature OSNs within the epithelium: overexpression of PrPC resulted in greater survival of mitotically active cells within the OSE, whereas absence of prion protein resulted in fewer cells being maintained over time. These results are supported by both quantitative PCR analysis of gene expression and protein analysis characteristic of OSN differentiation. Finally, evaluation of axon migration determined that OSN axon targeting in the olfactory bulb is PrPC dose-dependent. Together, these findings provide new mechanistic insight into the neuroprotective role for PrPC in adult OSE neurogenesis, whereby more mature neurons are stably maintained in animals expressing PrPC.

Funding information:
  • NIAID NIH HHS - AI81789(United States)
  • NINDS NIH HHS - R21 NS096662(United States)

Polε Instability Drives Replication Stress, Abnormal Development, and Tumorigenesis.

  • Bellelli R
  • Mol. Cell
  • 2018 May 17

Literature context:


Abstract:

DNA polymerase ε (POLE) is a four-subunit complex and the major leading strand polymerase in eukaryotes. Budding yeast orthologs of POLE3 and POLE4 promote Polε processivity in vitro but are dispensable for viability in vivo. Here, we report that POLE4 deficiency in mice destabilizes the entire Polε complex, leading to embryonic lethality in inbred strains and extensive developmental abnormalities, leukopenia, and tumor predisposition in outbred strains. Comparable phenotypes of growth retardation and immunodeficiency are also observed in human patients harboring destabilizing mutations in POLE1. In both Pole4-/- mouse and POLE1 mutant human cells, Polε hypomorphy is associated with replication stress and p53 activation, which we attribute to inefficient replication origin firing. Strikingly, removing p53 is sufficient to rescue embryonic lethality and all developmental abnormalities in Pole4 null mice. However, Pole4-/-p53+/- mice exhibit accelerated tumorigenesis, revealing an important role for controlled CMG and origin activation in normal development and tumor prevention.

Funding information:
  • NIAID NIH HHS - U01 AI070499(United States)

Generation and characterization of the human iPSC line IDISi001-A isolated from blood cells of a CADASIL patient carrying a NOTCH3 mutation.

  • Fernández-Susavila H
  • Stem Cell Res
  • 2018 Feb 8

Literature context:


Abstract:

Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is the most common form of hereditary stroke disorder. It is caused by mutations in NOTCH3 that lead to progressive degeneration of the smooth muscle cells in blood vessels. There is currently no treatment for this disorder. We reprogrammed to pluripotency blood mononuclear cells isolated from a patient carrying a NOTCH3 mutation by using a commercially available non-integrating system. The success in the generation of this iPSC line (IDISi001-A) suggests that the NOTCH3 mutation did not limit cell reprogramming and offers an unprecedented opportunity for studying and modeling CADASIL pathology.

Funding information:
  • NINDS NIH HHS - R01NS062080(United States)

MST4 Phosphorylation of ATG4B Regulates Autophagic Activity, Tumorigenicity, and Radioresistance in Glioblastoma.

  • Huang T
  • Cancer Cell
  • 2017 Dec 11

Literature context:


Abstract:

ATG4B stimulates autophagy by promoting autophagosome formation through reversible modification of ATG8. We identify ATG4B as a substrate of mammalian sterile20-like kinase (STK) 26/MST4. MST4 phosphorylates ATG4B at serine residue 383, which stimulates ATG4B activity and increases autophagic flux. Inhibition of MST4 or ATG4B activities using genetic approaches or an inhibitor of ATG4B suppresses autophagy and the tumorigenicity of glioblastoma (GBM) cells. Furthermore, radiation induces MST4 expression, ATG4B phosphorylation, and autophagy. Inhibiting ATG4B in combination with radiotherapy in treating mice with intracranial GBM xenograft markedly slows tumor growth and provides a significant survival benefit. Our work describes an MST4-ATG4B signaling axis that influences GBM autophagy and malignancy, and whose therapeutic targeting enhances the anti-tumor effects of radiotherapy.

Funding information:
  • NCI NIH HHS - P01 CA163205()
  • NCI NIH HHS - R01 CA159467()
  • NCI NIH HHS - R21 CA175875()
  • NCI NIH HHS - T32 CA070085()
  • NIAAA NIH HHS - R01 AA021751()
  • NIGMS NIH HHS - R01 GM038660(United States)
  • NIMHD NIH HHS - L32 MD010147()
  • NINDS NIH HHS - P30 NS081774()
  • NINDS NIH HHS - R01 NS080619()
  • NINDS NIH HHS - R01 NS083767()
  • NINDS NIH HHS - R01 NS093843()
  • NINDS NIH HHS - R01 NS095634()
  • NINDS NIH HHS - R01 NS102669()
  • NLM NIH HHS - K99 LM011673()
  • NLM NIH HHS - R00 LM011673()
  • NLM NIH HHS - R01 LM012011()

Heterogeneous Tumor-Immune Microenvironments among Differentially Growing Metastases in an Ovarian Cancer Patient.

  • Jiménez-Sánchez A
  • Cell
  • 2017 Aug 24

Literature context:


Abstract:

We present an exceptional case of a patient with high-grade serous ovarian cancer, treated with multiple chemotherapy regimens, who exhibited regression of some metastatic lesions with concomitant progression of other lesions during a treatment-free period. Using immunogenomic approaches, we found that progressing metastases were characterized by immune cell exclusion, whereas regressing and stable metastases were infiltrated by CD8+ and CD4+ T cells and exhibited oligoclonal expansion of specific T cell subsets. We also detected CD8+ T cell reactivity against predicted neoepitopes after isolation of cells from a blood sample taken almost 3 years after the tumors were resected. These findings suggest that multiple distinct tumor immune microenvironments co-exist within a single individual and may explain in part the heterogeneous fates of metastatic lesions often observed in the clinic post-therapy. VIDEO ABSTRACT.

Sex and laterality differences in medial amygdala neurons and astrocytes of adult mice.

  • Pfau DR
  • J. Comp. Neurol.
  • 2016 Aug 15

Literature context:


Abstract:

The posterodorsal aspect of the medial amygdala (MePD) in rats is sexually dimorphic, being larger and containing more and larger neurons in males than in females. It is also highly lateralized, with the right MePD larger than the left in both sexes, but with the smaller left MePD actually containing more and larger neurons than the larger right. Astrocytes are also strikingly sexually differentiated, with male-biased numbers and lateralized favoring the right in the rat MePD. However, comparable information is scant for mice where genetic tools offer greater experimental power. Hence, we examined the MePD from adult male and female C57Bl/6(J) mice. We now report that the MePD is larger in males than in females, with the MePD in males containing more astrocytes and neurons than in females. However, we did not find sex differences in astrocyte complexity or overall glial number nor effects of laterality in either measure. While the mouse MePD is generally less lateralized than in rats, we did find that the sex difference in astrocyte number is only on the right because of a significant lateralization in females, with significantly fewer astrocytes on the right than the left but only in females. A sex difference in neuronal soma size favoring males was also evident, but only on the left. Sex differences in the number of neurons and astrocytes common to both rodent species may represent core morphological features that critically underlie the expression of sex-specific behaviors that depend on the MePD. J. Comp. Neurol. 524:2492-2502, 2016. © 2016 Wiley Periodicals, Inc.

Funding information:
  • Wellcome Trust - WT098418MA(United Kingdom)

The medial amygdala-medullary PrRP-synthesizing neuron pathway mediates neuroendocrine responses to contextual conditioned fear in male rodents.

  • Yoshida M
  • Endocrinology
  • 2014 Aug 19

Literature context:


Abstract:

Fear responses play evolutionarily beneficial roles, although excessive fear memory can induce inappropriate fear expression observed in posttraumatic stress disorder, panic disorder, and phobia. To understand the neural machineries that underlie these disorders, it is important to clarify the neural pathways of fear responses. Contextual conditioned fear induces freezing behavior and neuroendocrine responses. Considerable evidence indicates that the central amygdala plays an essential role in expression of freezing behavior after contextual conditioned fear. On the other hand, mechanisms of neuroendocrine responses remain to be clarified. The medial amygdala (MeA), which is activated after contextual conditioned fear, was lesioned bilaterally by infusion of N-methyl-d-aspartate after training of fear conditioning. Plasma oxytocin, ACTH, and prolactin concentrations were significantly increased after contextual conditioned fear in sham-lesioned rats. In MeA-lesioned rats, these neuroendocrine responses but not freezing behavior were significantly impaired compared with those in sham-lesioned rats. In contrast, the magnitudes of neuroendocrine responses after exposure to novel environmental stimuli were not significantly different in MeA-lesioned rats and sham-lesioned rats. Contextual conditioned fear activated prolactin-releasing peptide (PrRP)-synthesizing neurons in the medulla oblongata. In MeA-lesioned rats, the percentage of PrRP-synthesizing neurons activated after contextual conditioned fear was significantly decreased. Furthermore, neuroendocrine responses after contextual conditioned fear disappeared in PrRP-deficient mice. Our findings suggest that the MeA-medullary PrRP-synthesizing neuron pathway plays an important role in neuroendocrine responses to contextual conditioned fear.

Funding information:
  • NICHD NIH HHS - Z01-HD008776(United States)
  • NIGMS NIH HHS - P20 GM103432(United States)