Podocarpus macrophyllus (Podocarpus macrophyllus): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does Podocarpus macrophyllus work as an anti-inflammatory?

Podocarpus macrophyllus contains bioactive compounds including podocarpic acid and biflavones, which are believed to modulate inflammatory pathways. These constituents may inhibit pro-inflammatory mediators, though the precise mechanism remains poorly characterized. Current understanding is based on preliminary phytochemical analysis rather than clinical trials (Evidence Level C). More rigorous research is needed to fully elucidate how these compounds exert their anti-inflammatory effects in humans.

Does Podocarpus macrophyllus interact with any medications?

There is limited research on drug interactions for Podocarpus macrophyllus. The presence of tannins may theoretically reduce absorption of certain medications, particularly alkaloids and minerals. No specific clinical interaction studies exist (Evidence Level C). Patients taking prescription medications, especially anti-inflammatory drugs or blood thinners, should consult a healthcare provider before using this herb. A 2-hour separation between herb and medication intake is generally advisable.

What is the recommended dosage of Podocarpus macrophyllus?

Traditional use suggests approximately 2 grams of dried leaf prepared as a tea for adult use. This recommendation is based on folk medicine practices rather than standardized clinical trials (Evidence Level C - Traditional). Standardized commercial preparations are not widely available, making precise dosing challenging. Users should begin with lower amounts and avoid consuming seeds, which contain toxic compounds. Consultation with a qualified herbal practitioner is recommended.

Is Podocarpus macrophyllus safe during pregnancy and breastfeeding?

Podocarpus macrophyllus is considered unsafe during pregnancy and should be strictly avoided. The seed coat contains toxic compounds that may pose significant risks to fetal development. Limited safety data (Evidence Level C) exist for the leaves and bark, but the potential for uterine stimulation and fetal toxicity warrants caution. Women who are pregnant, planning pregnancy, or breastfeeding should not use this herb and should consult a healthcare provider for safer alternatives.

What parts of Podocarpus macrophyllus are toxic?

The seed coat (aril) of Podocarpus macrophyllus contains toxic compounds and should never be consumed. While the fleshy berry portion is considered edible, the seeds pose a significant poisoning risk. Ingestion may cause gastrointestinal irritation, nausea, and vomiting. Traditional use focuses on the bark and leaves, which appear better tolerated (Evidence Level C - Traditional). Proper identification and preparation are essential to avoid accidental seed consumption.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Podocarpus macrophyllus is a gymnosperm species containing various bioactive compounds, including matairesinol and flavonoids, which have demonstrated cardioprotective, anti-inflammatory, and anti-proliferative activities in experimental models [PMID:39306883, PMID:24313298, PMID:34299601, PMID:29573148].

Contexte

Podocarpus macrophyllus, also known as Buddhist pine or Luohan pine, is an ancient gymnosperm species and a common ornamental garden plant [PMID:30313484, PMID:34696735, PMID:35482746].

Usages traditionnels

Species of Podocarpus are used traditionally in their native areas for the treatment of fevers, asthma, coughs, cholera, chest pain, arthritis, rheumatism, and sexually transmitted diseases [PMID:34299601].

Composés actifs

Identified constituents include matairesinol (a key component of the resin) [PMID:39306883], flavonoids such as podocarflavone A, quercetin, and (-)-catechin [PMID:24313298, PMID:17473463], phenolic diterpenes (inumakiols A-H) [PMID:19043241], and various bisnor- and norditerpene dilactones (makilactones E-R) [PMID:19571410, PMID:29573148].

Mécanisme d'action

Matairesinol regulates Prdx1 and PI3K/AKT/FOXO1 signaling to blunt adverse cardiac remodeling [PMID:39306883]. Certain flavonoids inhibit H2O2-induced apoptosis in cardiomyocytes by inhibiting the intracellular concentration of reactive oxygen species [PMID:24313298]. The compound 2,3-dihydro-4',4'''-di-O-methylamentoflavone inhibits pigmentation by decreasing protein and mRNA levels of tyrosinase-related protein-2 (TRP-2) [PMID:17473463]. Nagilactone B exhibits anti-inflammatory effects by decreasing the expression of inflammatory mediators in LPS-stimulated cells [PMID:34299601].

Preuves cliniques

Preuve DCardiac Hypertrophy and Remodeling

Matairesinol alleviated cardiac hypertrophy and remodeling induced by pressure overload in rat and mouse models [PMID:39306883]

Preuve DInflammation

Nagilactone B exhibited potent anti-inflammatory effects against nitric oxide production in RAW 264.7 and HT-29 cells [PMID:34299601]

Preuve DSkin Pigmentation

The compound 2,3-dihydro-4',4'''-di-O-methylamentoflavone showed a potent anti-tyrosinase effect in human epidermal melanocytes [PMID:17473463]

Preuve DCancer (In Vitro)

Various norditerpenes and dilactones exhibited anti-proliferative and cytotoxic activities against human solid tumor cell lines and P388 murine leukemia cells [PMID:29573148, PMID:19571410]

Synthèse des preuves

The current evidence consists entirely of in vitro studies and animal models (Level D), focusing on phytochemical isolation and pharmacological screening; there are no human clinical trials provided.

Sources PubMed

1.PMID: 39306883 (2024) — Matairesinol blunts adverse cardiac remodeling and heart failure induced by pressure overload by regulating Prdx1 and PI3K/AKT/FOXO1 signaling. · Phytomedicine : international journal of phytotherapy and phytopharmacology
2.PMID: 35814177 (2022) — The complete chloroplast genome sequence of Podocarpus macrophyllus (Podocarpaceae) and phylogenetic analysis. · Mitochondrial DNA. Part B, Resources
3.PMID: 36800928 (2024) — Phytochemical analysis and quality assessment of Podocarpus macrophyllus by UHPLC-DAD-ESI-MS and UHPLC-MS/MS MRM methods. · Natural product research
4.PMID: 34696735 (2021) — De novo transcriptome analysis provides insights into the salt tolerance of Podocarpus macrophyllus under salinity stress. · BMC plant biology
5.PMID: 31815964 (2019) — Using morphological attributes for the fast assessment of nutritional responses of Buddhist pine (Podocarpus macrophyllus [Thunb.] D. Don) seedlings to exponential fertilization.

Podocarpus macrophyllus

Sources et citations

Calculer une dose sûre de Podocarpus macrophyllus