Anti-GPR143 monoclonal antibody (DCABH-11788) Made to order

Rabbit anti-Human GPR143 monoclonal antibody for WB, ELISA

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Host Species
Antibody Isotype
Species Reactivity
A synthetic peptide of human GPR143 is used for rabbit immunization.


Alternative Names
GPR143; G protein-coupled receptor 143; OA1, ocular albinism 1 (Nettleship Falls); G-protein coupled receptor 143; ocular albinism 1 (Nettleship Falls); ocular albinism type 1 protein
Entrez Gene ID
UniProt ID

Product Background

GPCRs, Other, organism-specific biosystem;


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Amino acid starvation induces reactivation of silenced transgenes and latent HIV-1 provirus via down-regulation of histone deacetylase 4 (HDAC4)


Authors: Palmisano, Ilaria; Della Chiara, Giulia; D'Ambrosio, Rosa Lucia; Huichalaf, Claudia; Brambilla, Paola; Corbetta, Silvia; Riba, Michela; Piccirillo, Rosanna; Valente, Sergio; Casari, Giorgio; Mai, Antonello; Boneschi, Filippo Martinelli; Gabellini, Davide; Poli, Guido; Schiaffino, Maria Vittoria

The epigenetic silencing of exogenous transcriptional units integrated into the genome represents a critical problem both for long-term gene therapy efficacy and for the eradication of latent viral infections. We report here that limitation of essential amino acids, such as methionine and cysteine, causes selective up-regulation of exogenous transgene expression in mammalian cells. Prolonged amino acid deprivation led to significant and reversible increase in the expression levels of stably integrated transgenes transcribed by means of viral or human promoters in HeLa cells. This phenomenon was mediated by epigenetic chromatin modifications, because histone deacetylase (HDAC) inhibitors reproduced starvation-induced transgene up-regulation, and transcriptome analysis, ChIP, and pharmacological and RNAi approaches revealed that a specific class II HDAC, namely HDAC4, plays a critical role in maintaining the silencing of exogenous transgenes. This mechanism was also operational in cells chronically infected with HIV-1, the etiological agent of AIDS, in a latency state. Indeed, both amino acid starvation and pharmacological inhibition of HDAC4 promoted reactivation of HIV-1 transcription and reverse transcriptase activity production in HDAC4(+) ACH-2 T-lymphocytic cells but not in HDAC4(-) U1 promonocytic cells. Thus, amino acid deprivation leads to transcriptional derepression of silenced transgenes, including integrated plasmids and retroviruses, by a process involving inactivation or down-regulation of HDAC4. These findings suggest that selective targeting of HDAC4 might represent a unique strategy for modulating the expression of therapeutic viral vectors, as well as that of integrated HIV-1 proviruses in latent reservoirs without significant cytotoxicity.

Clinical evaluation and molecular screening of a large consecutive series of albino patients


Authors: Mauri, Lucia; Manfredini, Emanuela; Del Longo, Alessandra; Veniani, Emanuela; Scarcello, Manuela; Terrana, Roberta; Radaelli, Adriano Egidio; Calo, Donata; Mingoia, Giuseppe; Rossetti, Antonella; Marsico, Giovanni; Mazza, Marco; Gesu, Giovanni Pietro; Patrosso, Maria Cristina; Penco, Silvana; Piozzi, Elena; Primignani, Paola

Oculocutaneous albinism (OCA) is characterized by hypopigmentation of the skin, hair and eye, and by ophthalmologic abnormalities caused by a deficiency in melanin biosynthesis. In this study we recruited 321 albino patients and screened them for the genes known to cause oculocutaneous albinism (OCA1-4 and OCA6) and ocular albinism (OA1). Our purpose was to detect mutations and genetic frequencies of the main causative genes, offering to albino patients an exhaustive diagnostic assessment within a multidisciplinary approach including ophthalmological, dermatological, audiological and genetic evaluations. We report 70 novel mutations and the frequencies of the major causative OCA genes that are as follows: TYR (44%), OCA2 (17%), TYRP1 (1%), SLC45A2 (7%) and SLC24A5 (<0.5%). An additional 5% of patients had GPR143 mutations. In 19% of cases, a second reliable mutation was not detected, whereas 7% of our patients remain still molecularly undiagnosed. This comprehensive study of a consecutive series of OCA/OA1 patients allowed us to perform a clinical evaluation of the different OCA forms.

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