PMID- 32018341 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 2233-6834 (Print) IS - 2233-6842 (Electronic) IS - 2233-6834 (Linking) VI - 23 IP - 4 DP - 2019 Dec 31 TI - Polygonum cuspidatum stem extract (PSE) ameliorates dry eye disease by inhibiting inflammation and apoptosis. PG - 14-22 LID - 10.20463/jenb.2019.0026 [doi] AB - PURPOSE: Here, we aimed to determine the effect of Polygonum cuspidatum stem extract (PSE) on exorbital lacrimal gland-excised rat models and hyperosmotic stress-stimulated human conjunctival cells (HCCs). METHODS: Seven week old male Wistar rats were divided into six groups. Only the rats in the control group (NOR, n=5) did not undergo surgery. Three days after the surgery, the exorbital lacrimal gland-excised rats were randomly allocated to five groups: (1) vehicle-treated dry-eyed rats (DED, n=5); (2) PSE (10 mg/kg) treated DED rats (PSE-10, n=5); (3) PSE (100 mg/kg) treated DED rats (PSE-100, n=5); and (4) PSE (250 mg/kg) treated DED rats (PSE-250, n=5). In addition, the HCC line was co-treated with hyperosmolar media (528 mOsm) and PSE (1-100 mug/ml). RESULTS: PSE treatment restored the tear volume and goblet cell density by inhibiting severe corneal irregularities and damage. The treatment with PSE significantly attenuated the hyperosmolar stress-induced inflammation and cell death through the suppression of mRNA expression levels of Tumor necrosis factor-alpha (TNF-alpha), Interleukin-6 (IL-6), Interleukin-1beta (IL-1beta), and Interferon-gamma (IFN-gamma), and the expression of Bcl-2-associated X protein (Bax) as well as the activation of caspase-3 in vitro. CONCLUSION: The inhibitory effects of PSE treatment on dry eye disease indicate the potential of nutritional intervention by PES against inflammatory diseases without adverse effects. CI - (c)2019 The Korean Society for Exercise Nutrition. FAU - Park, Bongkyun AU - Park B FAU - Jo, Kyuhyung AU - Jo K FAU - Lee, Tae Gu AU - Lee TG FAU - Lee, Ik Soo AU - Lee IS FAU - Kim, Jin Sook AU - Kim JS FAU - Kim, Chan-Sik AU - Kim CS LA - eng PT - Journal Article PL - Korea (South) TA - J Exerc Nutrition Biochem JT - Journal of exercise nutrition & biochemistry JID - 101572566 PMC - PMC7004570 OTO - NOTNLM OT - Polygonum cuspidatum EDAT- 2020/02/06 06:00 MHDA- 2020/02/06 06:01 PMCR- 2019/12/31 CRDT- 2020/02/05 06:00 PHST- 2019/10/31 00:00 [received] PHST- 2019/12/12 00:00 [accepted] PHST- 2020/02/05 06:00 [entrez] PHST- 2020/02/06 06:00 [pubmed] PHST- 2020/02/06 06:01 [medline] PHST- 2019/12/31 00:00 [pmc-release] AID - JENB_2019_v23n4 [pii] AID - JENB_2019_v23n4_14 [pii] AID - 10.20463/jenb.2019.0026 [doi] PST - ppublish SO - J Exerc Nutrition Biochem. 2019 Dec 31;23(4):14-22. doi: 10.20463/jenb.2019.0026.