Pub Date : 2025-09-30DOI: 10.1038/s41684-025-01630-4
Alexandra Le Bras
{"title":"Mind the tag","authors":"Alexandra Le Bras","doi":"10.1038/s41684-025-01630-4","DOIUrl":"10.1038/s41684-025-01630-4","url":null,"abstract":"","PeriodicalId":17936,"journal":{"name":"Lab Animal","volume":"54 10","pages":"257-257"},"PeriodicalIF":3.9,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41684-025-01630-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-30DOI: 10.1038/s41684-025-01631-3
Alexandra Le Bras
{"title":"The mechanics of tumor plasticity","authors":"Alexandra Le Bras","doi":"10.1038/s41684-025-01631-3","DOIUrl":"10.1038/s41684-025-01631-3","url":null,"abstract":"","PeriodicalId":17936,"journal":{"name":"Lab Animal","volume":"54 10","pages":"258-258"},"PeriodicalIF":3.9,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41684-025-01631-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-30DOI: 10.1038/s41684-025-01628-y
Alexandra Le Bras
{"title":"Linking KMT2D to ASD","authors":"Alexandra Le Bras","doi":"10.1038/s41684-025-01628-y","DOIUrl":"10.1038/s41684-025-01628-y","url":null,"abstract":"","PeriodicalId":17936,"journal":{"name":"Lab Animal","volume":"54 10","pages":"255-255"},"PeriodicalIF":3.9,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-30DOI: 10.1038/s41684-025-01623-3
Jorge Ferreira
{"title":"Impact of different dietary fats on mice","authors":"Jorge Ferreira","doi":"10.1038/s41684-025-01623-3","DOIUrl":"10.1038/s41684-025-01623-3","url":null,"abstract":"","PeriodicalId":17936,"journal":{"name":"Lab Animal","volume":"54 10","pages":"254-254"},"PeriodicalIF":3.9,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-30DOI: 10.1038/s41684-025-01622-4
Jorge Ferreira
{"title":"Effects of perinatal exposure to energy drinks","authors":"Jorge Ferreira","doi":"10.1038/s41684-025-01622-4","DOIUrl":"10.1038/s41684-025-01622-4","url":null,"abstract":"","PeriodicalId":17936,"journal":{"name":"Lab Animal","volume":"54 10","pages":"254-254"},"PeriodicalIF":3.9,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-26DOI: 10.1038/s41684-025-01617-1
Joel Jovanovic, Megan L. Stone, Samantha R. Dooyema, Yuankai K. Tao, Sabine Fuhrmann, Edward M. Levine
Small molecules such as PLX5622 for microglia depletion and tamoxifen for inducible Cre recombination are commonly used in mouse research. Traditional application methods such as drug-infused chow, oral gavage or injections have limitations, including uncontrolled dosing (chow) or risk of injury and/or stress (gavage or injections). Here, to address these issues, we have developed an alternative oral drug delivery system using a gel-based rodent maintenance diet that allows for controlled consumption and adjustment of dosage and is suitable for water-insoluble small molecules. We tested DietGel 93M (93M) infused with PLX5622 (0.8 mg/g and 2.0 mg/g) in the Cx3cr1gfp/+ retinal microglia reporter mouse and tamoxifen-infused 93M (0.3125 mg/g) in the Rlbp1-CreERT2;Rosaai14 mouse with an inducible tdTomato reporter in retinal Müller glia. Mice were single caged and received daily batches of PLX5622-infused 93M over 14 days or tamoxifen-infused 93M for 1 or 3 days followed by a 14-day observation period. Longitudinal scanning laser ophthalmoscopy in vivo and fixed-tissue imaging were used to track GFP and tdTomato expression. Following evaluation of a suitable 93M consumption rate to sustain body weight, the PLX5622-93M diet at both concentrations tested showed a 94% microglia depletion rate at 3 days and >99% after 1 and 2 weeks. The tamoxifen-93M diet confirmed suitability for inducible Cre recombination, with significant treatment time-dependent efficacy and a positive correlation between total tamoxifen dose and tdTomato expression. This study demonstrates that a diet gel-based drug delivery system offers a minimally invasive alternative to current drug application methods for PLX5622 and tamoxifen. This approach could be useful for other drugs or tissues beyond the retina. Jovanovic et al. show that a gel-based diet can be used as a minimally invasive alternative system for the delivery of small molecules for microglia depletion and inducible Cre recombination in mice.
{"title":"Diet gel-based oral drug delivery system for controlled dosing of small molecules for microglia depletion and inducible Cre recombination in mice","authors":"Joel Jovanovic, Megan L. Stone, Samantha R. Dooyema, Yuankai K. Tao, Sabine Fuhrmann, Edward M. Levine","doi":"10.1038/s41684-025-01617-1","DOIUrl":"10.1038/s41684-025-01617-1","url":null,"abstract":"Small molecules such as PLX5622 for microglia depletion and tamoxifen for inducible Cre recombination are commonly used in mouse research. Traditional application methods such as drug-infused chow, oral gavage or injections have limitations, including uncontrolled dosing (chow) or risk of injury and/or stress (gavage or injections). Here, to address these issues, we have developed an alternative oral drug delivery system using a gel-based rodent maintenance diet that allows for controlled consumption and adjustment of dosage and is suitable for water-insoluble small molecules. We tested DietGel 93M (93M) infused with PLX5622 (0.8 mg/g and 2.0 mg/g) in the Cx3cr1gfp/+ retinal microglia reporter mouse and tamoxifen-infused 93M (0.3125 mg/g) in the Rlbp1-CreERT2;Rosaai14 mouse with an inducible tdTomato reporter in retinal Müller glia. Mice were single caged and received daily batches of PLX5622-infused 93M over 14 days or tamoxifen-infused 93M for 1 or 3 days followed by a 14-day observation period. Longitudinal scanning laser ophthalmoscopy in vivo and fixed-tissue imaging were used to track GFP and tdTomato expression. Following evaluation of a suitable 93M consumption rate to sustain body weight, the PLX5622-93M diet at both concentrations tested showed a 94% microglia depletion rate at 3 days and >99% after 1 and 2 weeks. The tamoxifen-93M diet confirmed suitability for inducible Cre recombination, with significant treatment time-dependent efficacy and a positive correlation between total tamoxifen dose and tdTomato expression. This study demonstrates that a diet gel-based drug delivery system offers a minimally invasive alternative to current drug application methods for PLX5622 and tamoxifen. This approach could be useful for other drugs or tissues beyond the retina. Jovanovic et al. show that a gel-based diet can be used as a minimally invasive alternative system for the delivery of small molecules for microglia depletion and inducible Cre recombination in mice.","PeriodicalId":17936,"journal":{"name":"Lab Animal","volume":"54 10","pages":"278-285"},"PeriodicalIF":3.9,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41684-025-01617-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-25DOI: 10.1038/s41684-025-01619-z
Charlotte Harrison
Researchers are increasingly using organ-on-chips and organoids alongside or instead of animals to model drug safety, biological mechanisms and rare diseases.
研究人员越来越多地将芯片上的器官和类器官与动物一起或代替动物来模拟药物安全性、生物机制和罕见疾病。
{"title":"New approach methodologies gain momentum, providing human-relevant alternatives to animal models","authors":"Charlotte Harrison","doi":"10.1038/s41684-025-01619-z","DOIUrl":"10.1038/s41684-025-01619-z","url":null,"abstract":"Researchers are increasingly using organ-on-chips and organoids alongside or instead of animals to model drug safety, biological mechanisms and rare diseases.","PeriodicalId":17936,"journal":{"name":"Lab Animal","volume":"54 10","pages":"250-253"},"PeriodicalIF":3.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41684-025-01619-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145140238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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