Pakong-tulog is an evergreen, perennial fern with densely tufted stems, 4 to 15 centimeters long, branched nearly to the
base. Leaves of the lower plane are crowded, ovate, with a distinct
cusp, bright green, rigid, serrulate on both margins. Leaves
of the upper plane are nearly as long, ovate lanceolate, cuspidate.
Sporophylls are keeled.
• In the Philippines, reported in Cagayan, Ilocos Norte, Bontoc, Zambales, Pampanga, Rizal, Batangas,
and Laguna, Quezon.
• Also occurs in China, Japan, Korea, India, Thailand, Cambodia, Indonesia, and Celebes.
• The whole plant may be collected throughout the year. Wash thoroughly,
cut off the roots and sun-dry. This may also be processed into charcoal
form by heating it with small glow until it turns black, sprinkle with
some clean water and re-dry under the sun. Rhizome or the trunk-like
portion of the main axis used for propagation. Preferably transplant
collected living plants.
• Study yielded flavonoids as main compounds, including amentoflavone, hinokiflavone, sotetsuflavone and apogenin.
• Study isolated four compounds from the n-BuOH fraction of water extracts: 1-hydroxy-2-[2-hydroxy-3-methoxy-5-(1-hydroxyethyl)-phenyl]-3-(4-hydroxy-3,5-dimethoxy)-propane-1-O-beta-D-glucopyranoside (tamariscinoside B (I) adenosine (2), guanosine (3) and arbutin (4). (8)
• Study isolated five compounds elucidated as: carnaubic acid, Selaginellin, 5,7,4',5'',7'',4'''-hexahydroxy-3',8''-Biflavone, β-D-fructofuranose-(2-1)-α-D-Glucopyr-anoside, α-D-mannopyranose-(1-1)-α-D-Mannopyranoside.
• Study isolated a new selaginellin named selaginellin O (1), along with three other known selaginellins (2-4). (see study below) (16)
• When dry, the fronds, particularly the young one, contract or roll up like the claws of a bird or like a miniature Cypress tree. Yellowish-brown, when moistened they spread out again and become green.
• The plant never dies, hence the name Resurrection Fern, and considered life-prolonging.
• Considered astringent and hemostatic.
- Edible: leaves; young shoots (cooked).
- Decoction use for the treatment of traumatic bleeding, hemoptysis, gastrointestinal bleeding, metrorrhagia, hematuria, persistent post-partum lochia, rectal prolapse and leucorrhea.
- Used to stop external bleed of any cause: powder or dress the wound with
granulated drug materials.
- Selaginella plus Thuja: For hematochezia due to a boil in the anal region
(patient cannot sit) or for an extra-menstrual bleeding uterus. Selaginella
preparation plus Thuja leaf preparation: Grind into powder, add warm
water. Drink the resulting infusion.
- In China, used for tracheitis and tumors; also, for amenorrhea and bowel hemorrhage. Also used for fever, detoxification and mobilization of blood circulation.
• Biflavonoids: Methanol extract significantly inhibited UV irradiation induced activity of MMP-1 in primary fibroblasts from human skin. Of the five biflavonoids isolated, sumaflavone and amentoflavone showed significant
MMP-1 inhibitory activity. (1)
/ Tumoricidal: Called Keon in Korea, S
tamariscina is a traditional medicinal plant
for therapy of advanced cancer patients in the Orient. It is thought
to modify gene expression and cytokine production. It also lowers blood
sugar and lipid peroxide levels. The biflavones isolated from related
Selaginella species exert both tumoricidal effects against human tumor
cell lines and anti-mutagenic activity. There is ongoing study for its
chemopreventive effects in stomach cancers.
• Isocryptomerin / Anti-fungal: Study isolated isocryptomerin, a biflavoinoid, which exerted antifungal activity in an energy-independent manner without hemolytic effects.
The antifungal activity may be through
a membrane-disruption mechanism. (2)
• Amentoflavone / Anti-fungal: Study isolated amentoflavone from the ethyl acetate extract of the whole plant. It exhibited potent antifungal activity against several pathogenic fungal strains presenting a great potential to be a lead compound for the development of antifungal agents. (9)
• Antimetastatic: Study demonstrated that Selaginella tamariscina extract could be a candidate antimetastatic agent against lung cancer. (3)
• Cell apoptosis: Cell apoptosis is important
in cellular homeostasis and anticarcinogenesis. Study suggests oxidative stress may be involved in the cytotoxicity of ST and that ST-induced
apoptosis of HL-60 cells is primarily mediated by the caspase activation
• Vasorelaxation: Study
yielded an active biflavonoid, amentoflavone and results suggest it relaxes smooth muscle via endothelium-dependent nitric oxide-cGMP signaling, with possible involvement of K and Ca channels. (5)
cancer: Study results suggest that Selaginella tamariscina could be a candidate chemopreventive agent against gastric cancer. (6)
• Amentoflavone / Anti-Cancer: Amentafkavine and the extracts from S. tamariscina were screened against five cancer cells. Assays in vitro showed inhibition of the proliferation of HL-60 (human leukemia cells), MCF-7 (human breast cancer cells), HeLa (human cervical carcinoma cells), human hepatoma carcinoma cells, and PANC-1 (human pancreatic cancer cells).
• Candidiasis: S-Phase Accumulation
of Candida albicans by Anticandidal Effect of Amentoflavone Isolated
from Selaginella tamariscina: Study suggests amentoflavone
has a potential for treatment of candidiasis. (7)
• Chemical Constituents / Liganoside: Study isolated a new liganoside, tamariscinoside C, together with D-mannitol, tyrosine and shikimic acid.
• Anti-Allergic: Study of the ethanol extract of ST showed it could inhibit mouse systemic anaphylactic shock and dose-dependently block passive cutaneous anaphylaxis and skin reactions caused by exogenous histamine and serotonin. Results suggest EST inhibits mast cell-dependent, immediate allergic reactions and suggests ST and one of its active flavonoids present a potential remedy for allergy-related diseases. (10)
• Antibacterial / Isocryptomerin: Study of the novel antibacterial isocryptomerin isolated from S. tamariscina against Gram-positive and Gram-negative bacterial strains including MRSA showed the isocryptomerin had considerable synergistic activity in combination with cefotaxime. (12)
• Hyoglycemic: Study in rats showed both EtOH and H2O extracts were able to ameliorate the fasting blood glucose and improved OGTT. Total cholesterol, LDL and fatty acids were also lowered. Compared with the water extract, the EtOH extract effects were more marked. (13)
• Anti-Fatigue: Study in mice of a polysaccharide from S. tamariscina showed an anti-fatigue effect with prolonged swimming time of loaded mice, decrease in BUN and blood lactic acid after swimming. (14)
• Selaginellins / Cytotoxic / Antioxidant: Study yielded a new selaginellin named selaginellin O, along with three other known selaginellins, 2-4. Selaginellins 1, 2, and 3 exhibited cytotoxic activity against cultured HeLa cells (human cervical carcinoma cells) as well as antioxidant activity. (16)
• Bone Disease Benefits / Anti-Osteoclastogenesis and Anti-Osteoclastic Activities: Study evaluated the inhibitory effect of S. tamariscina on osteoclast differentiation. Results showed a water extract to have beneficial effects on bone disease by inhibiting osteoclastogenesis and osteoclastic activity. (17)
• Hypolipidemic / Hepatoprotective / Amentoflavone: Amentoflavone isolated from S. tamariscina showed strong lipid lowering effect and favorable hepatoprotective effect in vivo. (19)
• Anti-Metastatic / Inhibition of MMP-9 in Human Nasopharyngeal Ca HONE-1 Cells: Study evaluated the anti-metastatic properties of ST extract in human nasopharyngeal carcinoma HONE-1 cells in vitro. The ST extract inhibited MMP-9 expression and HONE-1 cell metastasis. The inhibitory effects may involve the Src/FAK/ERK 1/2 pathway. Results suggest a potential of being an anti-metastatic agent against nasopharyngeal carcinoma (21)
• Attenuation of Metastasis / Oral Cancer: Study investigated the mechanism by which S. tamariscina inhibits the invasiveness of human oral squamous cell carcinoma (OSCC) HSC-3 cells. Results showed ST attenuated HSC-3 cell migration and invasion in a dose-dependent manner, at least, partially, through down-regulation of matrix metalloproteinases. Study suggests a potential as adjuvant therapeutic agent in the prevention of oral cancer. (22)
• Antidiabetic / Antioxidant / Antihyperlipidemic / Flavonoids: Study investigated the antidiabetic, antihyperlipidemic, and antioxidant activity of total flavonoids of ST in a mouse model of diabetes. Results showed an excellent effect in high blood glucose reduction, however, with no effect on normal blood glucose level. The antidiabetic effect may be explained by its antioxidant activity and antihyperlipidemic effect which could have elevated the insulin sensitivity of the liver. (24)
• Estrogenic Activity: Study evaluated the estrogenic activity of ten kinds of Selaginella tamariscina from ten different places of origin. Results showed S. tamariscina exerts estrogenic effect by activating gene transcription mediated by ERα. (25)
• Insulin-Mimetic Selaginellins: Study of methanol extract isolated three new selaginellins (2,4, and 5) together with two known selaginellin derivatives (1 and 3). All isolates showed strong glucose uptake stimulatory effects in 3T3-L1 adipocyte cells. They also showed inhibitory effects on PTP1B enzyme activity. Results suggest potential for these selaginellin derivatives as lead compounds for development of agents for T2DM. (26)
• Toxicity / Anticancer: Study evaluated the toxicity and antitumor effect of ethanol extract of S. tamarascina in a mice model. In a single-dose acute toxicity text, an oral administration of 10,000 mgkg did not cause any lethality. The STE could not prevent tumor formation but provided strong inhibition of tumor growth. (27)
• Tyrosine Phosphatase 1B inhibitory Activity / Selaginellin / Antidiabetic: Study isolated six selaginelline derivatives (1-6), comprising four new compounds (selariscinas A-D). The compounds exhibited inhibitory effect on PTP1B enzyme activity with IC50 ranging from 5.5 ± 0.1 to 21.6 ± 1.5 µM. Compound 2 showed greatest potency with IC50 of 5.5±0.1 µM. Results suggest a potential of the lead molecules for the development of antidiabetic agents. (28)
• Phytoremediation / Formaldehyde: In a study of 86 species of plants representing five general classes (ferns, woody and herbaceous foliage plants, Korean native plants and herbs), Selaginella tamarascina was one of nine plants that showed the highest formaldehyde removal efficiency. Phytoremediation potential was assessed by exposing the plants to gaseous formaldehde in airtight chambers. (29)
- Extracts in the cybermarket.