PMID- 37108065 OWN - NLM STAT- MEDLINE DCOM- 20230501 LR - 20230501 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 24 IP - 8 DP - 2023 Apr 7 TI - Discovery of Lactomodulin, a Unique Microbiome-Derived Peptide That Exhibits Dual Anti-Inflammatory and Antimicrobial Activity against Multidrug-Resistant Pathogens. LID - 10.3390/ijms24086901 [doi] LID - 6901 AB - The human body is a superorganism that harbors trillions of microbes, most of which inhabit the gut. To colonize our bodies, these microbes have evolved strategies to regulate the immune system and maintain intestinal immune homeostasis by secreting chemical mediators. There is much interest in deciphering these chemicals and furthering their development as novel therapeutics. In this work, we present a combined experimental and computational approach to identifying functional immunomodulatory molecules from the gut microbiome. Based on this approach, we report the discovery of lactomodulin, a unique peptide from Lactobacillus rhamnosus that exhibits dual anti-inflammatory and antibiotic activities and minimal cytotoxicity in human cell lines. Lactomodulin reduces several secreted proinflammatory cytokines, including IL-8, IL-6, IL-1beta, and TNF-alpha. As an antibiotic, lactomodulin is effective against a range of human pathogens, and is most potent against antibiotic-resistant strains such as methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium (VRE). The multifunctional activity of lactomodulin affirms that the microbiome encodes evolved functional molecules with promising therapeutic potential. FAU - Mousa, Walaa K AU - Mousa WK AD - College of Pharmacy, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. AD - AAU Health and Biomedical Research Center, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. AD - College of Pharmacy, Mansoura University, Mansoura 35516, Egypt. FAU - Ghemrawi, Rose AU - Ghemrawi R AUID- ORCID: 0000-0002-2465-0812 AD - College of Pharmacy, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. AD - AAU Health and Biomedical Research Center, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. FAU - Abu-Izneid, Tareq AU - Abu-Izneid T AD - College of Pharmacy, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. AD - AAU Health and Biomedical Research Center, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. FAU - Ramadan, Azza AU - Ramadan A AD - College of Pharmacy, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. AD - AAU Health and Biomedical Research Center, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates. FAU - Al-Marzooq, Farah AU - Al-Marzooq F AUID- ORCID: 0000-0001-5711-6264 AD - Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, UAE University, Al Ain P.O. Box 15551, United Arab Emirates. LA - eng GR - Ph2022-3-100/Al Ain University/ PT - Journal Article DEP - 20230407 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Anti-Bacterial Agents) RN - 0 (Peptides) RN - 0 (Anti-Inflammatory Agents) SB - IM MH - Humans MH - *Methicillin-Resistant Staphylococcus aureus MH - Microbial Sensitivity Tests MH - Anti-Bacterial Agents/pharmacology MH - Peptides/pharmacology MH - Anti-Inflammatory Agents/pharmacology MH - *Microbiota PMC - PMC10138793 OTO - NOTNLM OT - Lactobacillus OT - anti-inflammatory OT - antibiotics OT - immunomodulatory OT - microbiome COIS- The authors declare no conflict of interest. EDAT- 2023/04/28 06:41 MHDA- 2023/05/01 06:42 PMCR- 2023/04/07 CRDT- 2023/04/28 01:24 PHST- 2023/03/07 00:00 [received] PHST- 2023/04/05 00:00 [revised] PHST- 2023/04/06 00:00 [accepted] PHST- 2023/05/01 06:42 [medline] PHST- 2023/04/28 06:41 [pubmed] PHST- 2023/04/28 01:24 [entrez] PHST- 2023/04/07 00:00 [pmc-release] AID - ijms24086901 [pii] AID - ijms-24-06901 [pii] AID - 10.3390/ijms24086901 [doi] PST - epublish SO - Int J Mol Sci. 2023 Apr 7;24(8):6901. doi: 10.3390/ijms24086901.