HT1 Antibody
Description
Definition and Target Specificity
The term "HT1 Antibody" primarily refers to Anti HT1-56, a mouse-derived monoclonal IgG1 antibody that specifically targets human lung alveolar type 1 (AT1) cells. This antibody does not cross-react with other cell types in the lung, making it a critical tool for studying AT1 cell biology and pathology . AT1 cells are essential for gas exchange in the alveoli, and their dysfunction is linked to respiratory diseases such as pulmonary fibrosis and emphysema.
Research Findings and Clinical Relevance
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Diagnostic Utility: Anti HT1-56 has been instrumental in identifying AT1 cell loss in lung fibrosis models . For example, reduced staining intensity correlates with alveolar damage in idiopathic pulmonary fibrosis (IPF) biopsies.
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Therapeutic Potential: While not yet therapeutic itself, this antibody’s specificity supports drug development targeting AT1 cells. For instance, it has been used to validate gene therapies aimed at regenerating alveolar epithelium .
Comparative Analysis with Related Antibodies
Although "HT1" is occasionally conflated with other targets (e.g., HTLV-1 or 5HT1B receptors), these are distinct entities:
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HTLV-1 Antibodies: Target viral antigens (e.g., gp46) and are used to diagnose HTLV-1-associated diseases .
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5HT1B Receptor Antibodies: Detect serotonin receptors and are unrelated to lung biology .
Limitations and Future Directions
Current limitations of Anti HT1-56 include its restriction to research use and lack of commercial availability in standardized kits. Future studies could explore its utility in flow cytometry or single-cell sequencing to further dissect AT1 cell heterogeneity .
Product Specs
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
- Both loss-of-function and gain-of-function ht1 mutants exhibit completely disrupted CO2 responses, despite having normal responses to ABA. Light-induced stomatal opening is smaller in the ht1-3 allele and significantly smaller in ht1-2. These findings indicate that HT1 is a critical regulator for CO2 signaling and is partially involved in the light-induced stomatal opening pathway. PMID: 27034327
- Research has shown that HT1 is essential for red light-induced stomatal opening and interacts genetically with OST1 during stomatal responses to red light and altered [CO2 ]. PMID: 26192339
