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PubMed · Newbouldia laevis improved glucose and fat homeostasis in a TYPE-2 diabesity mice model. (2020)
PubMed · Pharmacognostic profiles, evaluation of analgesic, anti-inflammatory and anticonvulsant activities of Newbouldia laevis (P. Beauv.) Seem. ex Bureau leaf and root extracts in Wistar rats. (2023)
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This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.
Compiled from 30 PubMed articles · model: gemma4:31b
Summary
Newbouldia laevis is a woody tropical plant found in southwest Nigeria used in traditional medicine for various CNS disorders, pain, and metabolic issues [PMID:31759112, 37211190].
Background
Newbouldia laevis (Bignoniaceae) is a woody tropical plant commonly found in southwest Nigeria [PMID:31759112].
Traditional uses
In Nigeria, leaves and roots are used for pain, inflammation, convulsion, and epilepsy [PMID:37211190]. It is applied in the management of CNS disorders such as psychosis, insomnia, convulsions, anxiety, and depression [PMID:31759112], and has long-standing use in managing diabetes mellitus [PMID:31926312]. In Togo, it is cited for the treatment of malaria [PMID:27114686], and in Benin, it is used by farmers to treat digestive helminths in small ruminants [PMID:21960378]. It is also used in some African countries to treat problems associated with infertility and childbirth [PMID:37438649].
Active compounds
Identified compounds include caffeic acid glycosides (Newboulasides A and B) [PMID:32720525], phenylethanoid glycosides (newbouldiosides A-F) [PMID:33157560, 16497346, 9041716], pyrazole alkaloids (withasomnine, newbouldine) [PMID:25348466], and naphthoquinone-anthraquinone coupled pigments (newbouldiaquinone A) [PMID:16442576, 15930769]. Other constituents include flavonoids, tannins, terpenes, steroidal and cardiac glycosides, oleanolic acid, canthic acid, lapachol, and beta-sitosterol [PMID:20161915, 17718200, 15930769].
Mechanism of action
The antidiabetic effect may be mediated through the inhibition of $\alpha$-amylase enzyme activity [PMID:32720525].
Clinical evidence
Evidence DDiabetes/Obesity
Ethanol leaf extract (butanol fraction) improved glucose and fat homeostasis in a type-2 diabesity mice model [PMID:31926312]
Evidence DAnxiety and Depression
Hydroethanol leaf extract exhibited anxiolytic and antidepressant-like activities in mice [PMID:31759112]
Evidence DPain and Inflammation
Methanol leaf and root extracts showed analgesic and anti-inflammatory activities in Wistar rats [PMID:37211190]
Evidence DConvulsions
Methanol leaf and root extracts showed anticonvulsant activities in Wistar rats [PMID:37211190]
Evidence DInsomnia/Sedation
Methanolic leaf extract caused reductions in exploratory and motor activity and prolonged pentobarbital-induced hypnosis in rats/mice [PMID:12577520]
Evidence DInfections (Antimicrobial)
Methanolic extracts showed in vitro activity against various Gram-positive and Gram-negative bacteria and Candida species [PMID:17718200, 20161915]
Safety & adverse effects
Aqueous leaf extract was found to be mutagenic in the Ames Salmonella fluctuation test and SOS Chromotest, and induced chromosomal aberrations and root growth inhibition in Allium cepa models [PMID:37438649, 19619631]. However, methanol leaf and root extracts were tested for acute toxicity in Wistar rats at a maximum dose of 2000 mg/kg (orally) [PMID:37211190].
Drug interactions
Newbouldia laevis extracts inhibited CYP450 enzyme activities, specifically CYP1A2, CYP2C9, and CYP2C19, with a time-dependent inhibition (TDI) effect observed on CYP1A2 [PMID:27399660].
Evidence summary
The current evidence is based entirely on in vitro studies and animal models (mice/rats); there are no human clinical trials provided. Strength of evidence is low (Level D).
PubMed sources
1.PMID: 37211190 (2023) — Pharmacognostic profiles, evaluation of analgesic, anti-inflammatory and anticonvulsant activities of Newbouldia laevis (P. Beauv.) Seem. ex Bureau leaf and root extracts in Wistar rats. · Journal of ethnopharmacology
2.PMID: 31759112 (2020) — Anxiolytic- and antidepressant-like activities of hydroethanol leaf extract of Newbouldia laevis (P.Beauv.) Seem. (Bignoniaceae) in mice. · Journal of ethnopharmacology
3.PMID: 31926312 (2020) — Newbouldia laevis improved glucose and fat homeostasis in a TYPE-2 diabesity mice model. · Journal of ethnopharmacology
4.PMID: 32720525 (2022) — Newboulasides A and B, two new caffeic acid glycosides from Newbouldia laevis with α-amylase inhibitory activity. · Natural product research
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Newbouldiaquinone A showed moderate chemo suppression of Plasmodium falciparum growth in vitro [PMID:16442576]
Evidence DHelminthiasis
Essential oils and extracts inhibited the exsheathment of third-stage infective larvae of gastrointestinal nematodes in vitro [PMID:21960378, 21497021]
(2012)
— In vitro anthelmintic activity of the essential oils of Zanthoxylum zanthoxyloides and Newbouldia laevis against Strongyloides ratti.
· Parasitology research
6.PMID: 33157560 (2021) — Studies on Bignoniaceae: Newbouldiosides D - F, Minor Phenylethanoid Glycosides from Newbouldia laevis, and New Flavonoids from Markhamia zanzibarica and Spathodea campanulata. · Planta medica
7.PMID: 17718200 (2007) — Antimicrobial activity of the methanolic extract and of the chemical constituents isolated from Newbouldia laevis. · Die Pharmazie
8.PMID: 33355056 (2020) — Secondary metabolites of endophytic fungi from Newbouldia laevis and Cassia tora leaves: prospecting for new antimicrobial agents. · Recent patents on anti-infective drug discovery
9.PMID: 12577520 (2002) — Sedative effects of the methanolic leaf extract of Newbouldia laevis in mice and rats. · Bollettino chimico farmaceutico
10.PMID: 20161915 (2007) — Phytochemical and in vitro antimicrobial assay of the leaf extract of Newbouldia laevis. · African journal of traditional, complementary, and alternative medicines : AJTCAM
11.PMID: 37438649 (2024) — Cellular toxicity and DNA damage induced by Newbouldia laevis used for male infertility treatment in prokaryotic and eukaryotic models. · Protoplasma
13.PMID: 16497346 (2006) — Newbouldiosides A-C, phenylethanoid glycosides from the stem bark of Newbouldia laevis. · Phytochemistry
14.PMID: 25348466 (2014) — Computational study of antimalarial pyrazole alkaloids from Newbouldia laevis. · Journal of molecular modeling
15.PMID: 15930769 (2005) — Newbouldiaquinone and newbouldiamide: a new naphthoquinone-anthraquinone coupled pigment and a new ceramide from Newbouldia laevis. · Chemical & pharmaceutical bulletin
16.PMID: 21497021 (2011) — Involvement of tannins and flavonoids in the in vitro effects of Newbouldia laevis and Zanthoxylum zanthoxyloïdes extracts on the exsheathment of third-stage infective larvae of gastrointestinal nematodes. · Veterinary parasitology
17.PMID: 16442576 (2006) — Newbouldiaquinone A: A naphthoquinone-anthraquinone ether coupled pigment, as a potential antimicrobial and antimalarial agent from Newbouldia laevis. · Phytochemistry
18.PMID: 19619631 (2009) — Mutagenic screening of some commonly used medicinal plants in Nigeria. · Journal of ethnopharmacology
19.PMID: 27114686 (2016) — Ethnobotanical Study of Medicinal Plants Used for the Treatment of Malaria in the Plateau Region, Togo. · Pharmacognosy research
20.PMID: 25849161 (2015) — In vitro antioxidant capacity and free radical scavenging evaluation of active metabolite constituents of Newbouldia laevis ethanolic leaf extract. · Biological research
21.PMID: 27399660 (2016) — In Vitro Reversible and Time-Dependent CYP450 Inhibition Profiles of Medicinal Herbal Plant Extracts Newbouldia laevis and Cassia abbreviata: Implications for Herb-Drug Interactions. · Molecules (Basel, Switzerland)
22.PMID: 26590804 (2015) — In vitro antibacterial and antibiotic-potentiation activities of the methanol extracts from Beilschmiedia acuta, Clausena anisata, Newbouldia laevis and Polyscias fulva against multidrug-resistant Gram-negative bacteria. · BMC complementary and alternative medicine