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Background Uterine fibroids are a common type of solid tumor presenting in women of reproductive age. There are very few alternative treatment available from conventional treatment involving surgeries. Labisia pumila var. alata or locally known as 'Kacip Fatimah' was widely used as traditional medicine in Malaysia. This plant has been used to maintain a healthy female reproductive system. The present study aimed to evaluate anti fibroid potential of L. pumila extracts through in vitro apoptosis activity against uterine leiomyoma cells (SK-UT-1) and in uterine leiomyoma xenograft model. Evaluation of bioactive markers content were also carried out. Methods Apoptotic induction of the extracts was determined by morphological examination of AO/PI dual staining assay by flourescent microscopy and flow cytometry analysis on Annexin V-FITC/PI stained cells. In vivo study was done in immune-compromised mouse xenograft model. HPLC analysis was employed to quantify marker compounds. Results Morphological analysis showed L. pumila induced apoptosis in a dose dependent manner against SK-UT-1 cells. In vivo study indicated that L. pumila significantly suppressed the growth of uterine fibroid tumor. All tested extracts contain bioactive marker of gallic acid and cafeic acid. Conclusion This work provide significant data of the potential of L. pumila in management of uterine fibroids. .

In the present study, two important starting materials and 18 new 1,2,4-triazole compounds with mono ring system have been synthesized and characterized. The mono system showed 16 compounds of a Schiff base moiety attached to the triazole ring which was prepared from the corresponding starting material 5(A–B) or piperidinium salt system 6(A–B). All these compounds were characterized using Fourier Transform Infrared (FT-IR) and Nuclear Magnetic Resonance (NMR) spectroscopy and carbon hydrogen nitrogen (CHN) elemental analysis. The compounds were selected for in vitro anticancer study to test the therapeutic cytotoxic potential against cancer cells. The MTT test was conducted against human breast (MCF-7) and colorectal (HCT-116) cancer cells. Among all the compounds tested, 7A-i demonstrated more pronounced in vitro anticancer effect against MCF-7 and HCT-116 cells with IC50 of 38 and 19.2 μM, respectively, comparable to that of the standard reference drugs, tamoxifen and 5-fluorouracil, respectively. Compound 7A-vi showed a considerable cytotoxic effect with IC50 53 and 41.2 μM against MCF-7 and HCT-116 cells, respectively. Compounds 7A-ii, 7A-iii and 7A-v exhibited moderate cytotoxicity with IC50 68, 91 and 85 μM, respectively against MCF-7 cells and also 59.3, 81.7 and 137.1 μM against HCT-116 cells, respectively. However, all other compounds tested in this study showed poor cytotoxicity against both the cell lines. Cellular morphological analysis revealed that the cytotoxicity induced by the compounds could probably due to autophagy. It can be concluded that 1,2,4-triazole derivatives can be promising therapeutic agents. Further studies will be done to investigate the antitumor efficacy of the 1,2,4-triazole derivatives using suitable preclinical models.

The bidentate N-cyclohexyl-2-(3-hydroxy-4-methoxybenzylidene)hydrazine-1-carbothioamide Schiff base ligand (HL) was coordinated to divalent nickel, palladium and platinum ions to form square planar complexes. The nickel and palladium complexes, [NiL2 ], [PdL2 ] form square planar complexes with 2:1 ligand to metal ratio. The platinum complex, [PtL(dmso)Cl] formed a square planar complex with 1:1 ligand to metal ratio. Platinum undergoes in situ reaction with DMSO before complexing with the ligand in solution. The cytotoxicity of HL, [NiL2 ], [PdL2 ], and [PtL(dmso)Cl] were evaluated against human colon cancer cell line (HCT-116), human cervical cancer (Hela) cell line, melanoma (B16F10) cells, and human normal endothelial cell lines (Eahy926) by MTT assay. The [NiL2 ] complex displayed selective cytotoxic effect against the HCT 116 cancer cell line with IC50 of 7.9 ± 0.2 μM. However, HL, [PdL2 ], and [PtL(dmso)Cl] only exhibited moderate cytotoxic activity with IC50 = 75.9 ± 2.4, 100.0 ± 1.8, and 101.0 ± 3.6 μM, respectively. The potent cytotoxicity of [NiL2 ] was characterized using Hoechst and Rhodamine assays. The nickel complex, [NiL2 ], caused remarkable nuclear condensation and reduction in mitochondrial membrane potential. In addition, molecular docking studies confirms that [NiL2 ] possesses significant binding efficiency with Tyrosine kinase. Altogether, the results revealed that [NiL2 ] exhibits cytotoxicity against the cancer cells via Tyrosine kinase-induced proapoptosis pathway. This study demonstrates that the [NiL2 ] complex could be a promising therapeutic agent against colorectal carcinoma.

NuvastaticTM is a polymolecular botanical drug formulation containing a proprietary extract of a selected cultivar of Orthosiphon stamineus (OS) code name, C5OSEW5050ESA OS. The anti-angiogenic activity of C5OSEW5050ESA OS was explored by evaluating its activity towards a variety of angiogenesis modulators in vitro and in vivo. Multiplex immunoassays reveals that C5OSEW5050ESA OS inhibits Vascular Endothelial Growth factor (VEGF), Epidermal Growth Factor (EGF), Fibroblast Growth Factor (FGF), Interleukin 2 ( IL-2) & Interleukin 7 (IL-7), Nerve Growth Factor β (NGF-β) , Transforming Growth Factor -α (TGF-α) and Tumor Necrosis Factor- β (TNF-β). C5OSEW5050ESA OS also caused significant upregulation of interferon α (IFN-α), interferon β (IFN-β), interferon γ (IFN-γ) and Granulocyte-macrophage colony-stimulating factor (GM-CSF). C5OSEW5050ESA OS was found to inhibit endothelial cell proliferation and migration (92.6%) and disrupts the tube assembly (98.26%) for new blood vessel formation. The compound also inhibits neovascularisation in isolated rat aortic ring tissues (IC50 18.2 ± 2 µg/mL) and in chick chorioallantoic membrane assays (CAM) by 82.7%. In vivo matrigel plug assay treated with C5OSEW5050ESA OS shows inhibition of neovascularisation by 91.4± 3%. In conclusion, the study reveals that C5OSEW5050ESA OS has strong anti-angiogenic and immunomodulatory properties which may have significant clinical benefits in cancer therapy.

Cardamonin (CADMN) exerts an in vitro antiproliferative and apoptotic actions against human hepatocellular carcinoma cells (HepG2). This study aimed to investigate the in vivo anti-tumorigenic action of CADMN against human hepatocellular carcinoma xenografts in an athymic nude mice, as well as to study the molecular docking and safety profile of this compound. Acute toxicity study demonstrated that CADMN is safe and well-tolerated up to 2000 mg/kg in ICR mice. Oral administration of 50 mg/kg/day of CADMN in xenografted nude mice showed a significant suppression in tumor growth as compared to untreated control group without pronounced toxic signs. Immunohistochemistry assay showed downregulation of proliferative proteins such as PCNA and Ki-67 in treated groups as compared to untreated control. Additionally, immunofluorescence analysis showed a significant downregulation in anti-apoptotic Bcl-2 protein, whereas pre-apoptotic Bax protein was significantly upregulated in nude mice treated with 25 and 50 mg/kg CADMN as compared to untreated mice. The findings also exhibited down-regulation of NF-&kappa, B-p65, and Ikk&beta, proteins, indicating that CADMN deactivated NF-&kappa, B pathway. The molecular docking studies demonstrated that CADMN exhibits good docking performance and binding affinities with various apoptosis and proliferation targets in hepatocellular cancer cells. In conclusion, CADMN could be a potential anticancer candidate against hepatocellular carcinoma. Other pharmacokinetics and pharmacodynamics properties, however, need to be further investigated in depth.

Graphical abstract, Pancreatic cancer has the highest mortality rate among cancers due to its aggressive biology and lack of effective treatment. Gemcitabine, the first line anticancer drug has reduced efficacy due to acquired resistance. The current study evaluates the toxicological effects of Orthosiphon stamineus (O.s) and its marker compound (rosmarinic acid) in combination with gemcitabine. O.s (200 or 400 mg/kg/day) and rosmarinic acid (32 mg/kg/day) were administered orally and gemcitabine (10 mg/kg/3 days) intraperitoneally either alone or in combination treatment for fourteen days. Parameters including blood serum biochemistry, hematology, myeloid-erythroid ratio, incident of lethality, and histopathological analysis of liver, kidney, and spleen tissues were studied. Neither, individual drugs/extract nor chemo-herbal combinations at tested doses induced any toxicity and damage to organs in nude mice when compared to control group. Toxicological data obtained from this study will help to select the best doses of chemo-herbal combination for future pancreatic xenograft tumor studies.

Four heterocyclic embedded Schiff base derivatives (1–4) were synthesized and characterized by melting point, elemental analysis, FTIR, 1H, 13C NMR, UV–Visible spectral data. The structures of compounds 1, 2 and 4 were successfully established through single crystal X-ray diffraction analysis. In vitro cholinesterase inhibition assays showed that the cyclized derivative 1 displayed higher BuChE enzyme inhibitory activity with IC50 value of 1.45 ± 0.09 μM. The anti-proliferative efficacies of the compounds were also evaluated using human colorectal HCT 116 and breast MCF-7 adenocarcinoma cell lines. In addition, a human normal endothelial cell line (Ea.hy926) was also tested to assess the safety and selectivity of the compounds towards normal and cancer cells, respectively. Among the compounds tested, compound 2 displayed potent cytotoxic effect (IC50 = 34 μM) against HCT 116 cells with highest selectivity index of 3.1 with respect to the normal endothelial cells. Whereas, compound 4 exhibited significant anti-proliferative effect (IC50 = 21.1 μM) against MCF-7 cells with highest selectivity index of 3.3 with respect to the normal endothelial cells. The docking result of these compounds against hAChE showed potent activities with different binding modes. These compounds could be a promising pharmacological agent to treat cancer and Alzheimer's disease.

Purpose Koetjapic acid is an active compound of a traditional medicinal plant, Sandoricum koetjape. Although koetjapic acid has a promising anticancer potential, yet it is highly insoluble in aqueous solutions. To increase aqueous solubility of koetjapic acid, we have previously reported a chemical modification of koetjapic acid to potassium koetjapate (KKA). However, pharmacokinetics of KKA has not been studied. In this study, pharmacokinetics and antiangiogenic efficacy of KKA are investigated. Methods Pharmacokinetics of KKA was studied after intravenous and oral administration in SD rats using HPLC. Anti-angiogenic efficacy of KKA was investigated in rat aorta, human endothelial cells (EA.hy926) and nude mice implanted with matrigel. Results Pharmacokinetic study revealed that KKA was readily absorbed into blood and stayed for a long time in the body with Tmax 2.89 ± 0.12 h, Cmax 7.24 ± 0.36 μg/mL and T1/2 1.46 ± 0.03 h. The pharmacological results showed that KKA significantly suppressed sprouting of microvessels in rat aorta with IC50 18.4 ± 4.2 μM and demonstrated remarkable inhibition of major endothelial functions such as migration, differentiation and VEGF expression in endothelial cells. Further, KKA significantly inhibited vascularization in matrigel plugs implanted in nude mice. Conclusions The results indicate that bioabsorption of KKA from oral route was considerably efficient with longer retention in body than compared to that of the intravenous route. Further, improved antiangiogenic activity of KKA was recorded which could probably be due to its increased solubility and bioavailability. The results revealed that KKA inhibits angiogenesis by suppressing endothelial functions and expression of VEGF.

Objectives Recently, we have isolated koetjapic acid (KA) from Sandoricum koetjape and identified its selective anticancer potentiality against colorectal carcinoma. KA is quite likely to be useful as a systemic anticancer agent against colorectal malignancy. However, with extremely low solubility, KA has to be converted into a biocompatible solubilized form without compromising the bioefficacy. Objective of this study is to enhance solubility of KA and to evaluate anticancer efficacy of potassium koetjapate in human colorectal cancer cells. Methods (2-Hydroxypropyl)-β-cyclodextrin inclusion complex and solid dispersions (carboxymethyl cellulose, polyvinylpyrrolidone and sodium lauryl sulphate) of KA were prepared. In addition, a salt of KA, potassium koetjapate was synthesized. Key findings Potassium koetjapate demonstrated higher solubility than the other tested formulations with enhanced cytotoxicity against HCT 116 cells. The enhanced efficacy of potassium koetjapate is attributed to apoptotic induction of nuclear condensation and disruption of mitochondrial membrane potential in the cells. Interestingly, potassium koetjapate was found to be safe in rats after oral administration (LD50 > 2000 mg/kg). Conclusions The salt formulation of KA appears to modulate the capability of the parent compound by enhancing its solubility and improves its bioefficacy against colon cancer cells, suggesting attractive roles for its applications in medicine.

OBJECTIVE: The present study aimed to investigate the mechanisms underlying the anti-inflammatory and anti-angiogenic effects of ethyl-p-methoxycinnamate isolated from Kaempferia galanga. METHODS: The anti-inflammatory effects of ethyl-p-methoxycinnamate were assessed using the cotton pellet granuloma assay in rats, whereby the levels of interleukin-1 and tumor necrosis factor-α were measured in the animals' blood. In addition, the levels of interleukin, tumor necrosis factor, and nitric oxide were measured in vitro using the human macrophage cell line (U937). The analgesic effects of ethyl-p-methoxycinnamate were assessed by the tail flick assay in rats. The anti-angiogenic effects were evaluated first by the rat aortic ring assay and, subsequently, by assessing the inhibitory effects of ethyl-p-methoxycinnamate on vascular endothelial growth factor, proliferation, migration, and tube formation in human umbilical vein endothelial cells. RESULTS: Ethyl-p-methoxycinnamate strongly inhibited granuloma tissue formation in rats. It prolonged the tail flick time in rats by more than two-fold compared with the control animals. The inhibition of interleukin and tumor necrosis factor by ethyl-p-methoxycinnamate was significant in both in vivo and in vitro models; however, only a moderate inhibition of nitric oxide was observed in macrophages. Furthermore, ethyl-p-methoxycinnamate considerably inhibited microvessel sprouting from the rat aorta. These mechanistic studies showed that ethyl-p-methoxycinnamate strongly inhibited the differentiation and migration of endothelial cells, which was further confirmed by the reduced level of vascular endothelial growth factor. CONCLUSION: Ethyl-p-methoxycinnamate exhibits significant anti-inflammatory potential by inhibiting pro-inflammatory cytokines and angiogenesis, thus inhibiting the main functions of endothelial cells. Thus, ethyl-p-methoxycinnamate could be a promising therapeutic agent for the treatment of inflammatory and angiogenesis-related diseases.

Syzygium campanulatumKorth is an equatorial, evergreen, aboriginal shrub of Malaysia. Conventionally it has been used as a stomachic. However, in the currently conducted study dimethyl cardamonin or 2′,4′-dihydroxy-6′-methoxy-3′,5′-dimethylchalcone (DMC) was isolated fromS. campanulatumKorth, leaf extract. The structural characterization of DMC was carried out by making use of various techniques including UV, IR, NMR spectral followed by LC-MS, and X-ray crystallographic techniques. For determining the purity of compound, highly effective techniques including TLC, HPLC, and melting point were used. The cytotoxicity of DMC and three different extracts ofS. campanulatumwas evaluated against human colon cancer cell line (HT-29) by three different assays. DMC and ethanolic extract revealed potent and dose-dependent cytotoxic activity on the cancer cell line with IC5012.6 and 90.1 µg/mL, respectively. Quite astonishingly to our knowledge, this is the very first report onS. campanulatumas being a rich source (3.5%) of DMC, X-ray crystallography, and anticancer activity on human colon cancer cells.

The article describes synthesis, characterization (NMR, FT-IR, microanalysis, X-ray crystallography), in vitro anticancer, and antioxidant activity of para-xylyl linked bis-benzimidazolium salts and respective dinuclear Ag–NHC complexes. All the compounds were tested for their cytotoxicity against human colorectal cancer cells (HCT 116) and DPPH antioxidant evaluation. According to cell viability measurements using MTT assay, all the tested compounds showed dose-dependent cytotoxic activity against HCT 116 cells. The tested compounds demonstrated significant activity with IC50 values range 0.29–3.30 μM for HCT 116 and % age inhibition 6.37–21.00 for DPPH antioxidant study. 5-Fluorouracil was used as standard drug (IC50 19.2 μM for HCT 116) whereas for DPPH analysis, Gallic acid was used as positive control (% age inhibition 77.68). All the compounds showed potential anticancer activity against human colorectal cancer whereas antioxidant activity was not significant. We found that as the size of N-alkyl substitution on benzimidazolium salt increases its cytotoxicity against cancer decreases whereas a reverse occurs in case of respective complexes.

Background Orthosiphon stamineus is used traditionally to treat gout, arthritis, and inflammatory related conditions. The in vitro anti-inflammatory effects of the plant have been scientifically investigated. The goal of the present study was to evaluate the potential of the 50% ethanol extract of O. stamineus (EOS) to treat rheumatoid arthritis. Methods Anti-arthritic activity was assessed using the in vitro heat denaturation test and the (FCA)-induced arthritis model. Efficacy was assessed by measurements of paw edema and granulation, X-ray radiography, fluorescence molecular tomography (FMT), and histological evaluation. Levels of (TNF-α), interleukin-1 (IL-1), and (COX-1 and COX-2) were analyzed in vitro in lipopolysaccharide (LPS)-stimulated human macrophage (U937). TNF-α and IL-1 levels in the serum samples of arthritic rats were also measured using an ELISA kit. Results Treatment with EOS resulted in dose-dependent inhibition of paw edema in acute and chronic models of inflammation. It also inhibited significantly the production of TNF-α, IL-1 COX-1, and COX-2 in the LPS-stimulated U937 macrophages. EOS significantly suppressed FCA-induced paw edema as well as the serum levels of TNF-α and IL-1. X-rays of the synovial joint of the hind leg showed considerable improvement in joint integrity and recovery of tibia-talus bones from degeneration and osteoporotic lesions. Histology of proximal interphalangeal joints of EOS-treated animals showed obvious protection of cartilage and soft tissue. Finally, FMT analysis strongly supported the anti-arthritic effect of EOS. EOS had high phenolic and total flavonoid content as well as strong antioxidant activity. Conclusions Results illustrated that the anti-arthritic properties of O. stamineus could be beneficial for prevention and management of rheumatoid arthritis and other chronic inflammatory disorders. Graphical abstract Illustration of the Anti- arthritis efficacy of Orthosiphon Stamineus standardized extract.

Fermented Virgin Coconut Oil (FVCO) is widely used in the Southeast Asia as food and traditional medicine. The objective of the present study is the evaluation of chronic safety of the commercialized FVCO of Malaysia and other Southeast Asian countries. A single dose of 5000 mg/kg of FVCO was administered orally in rats (each group, n = 5) for the acute toxicity study and 175, 550 and 2000 mg/kg for sub-chronic and chronic studies (each group, n = 10), respectively. The behavior, mortality, and body weight of the rats were assessed to determine the toxic effects of FVCO. The haematology, biochemistry and histopathology of the treated rats were evaluated. The treated rats were safe with the dose of 5000 mg/kg in acute, sub-chronic and chronic indication. Abnormal clinical signs and morphology (gross necroscopy), changes of organ weight, anomalous haematology and biochemistry indexes were not found in comparison with the control (p > 0.05). In general, food and water intake were higher in the treated rats related to control. It was concluded that the presence of the antioxidant active compounds of FVCO might be the reason of safety. The structure activity relationship (SAR) provides a comprehensive mechanism to determine the safety that is the presence of the electron donating phenolic groups, carbonyl groups, and carboxylic acid in the ortho and meta position of the aromatic rings. The SAR showed the antioxidant properties of myristic acid and lauric acid determined by GC-MS analysis. This result suggests the safety of FVCO for chronic use, nutritional activity that FVCO formulation complies the requirements of regulatory agencies.

Background: Star fruit (Averrhoa carambola) is a well-known plant in Malaysia which bears a great significance in traditional medicine. Objectives: This study aimed to evaluate the antihyperlipidemic effect, antioxidant potential and cytotoxicity of aqueous and methanolic extracts of ripe and unripe fruits, leaves and stem of A. carambola. Methods: Antihyperlipidemic activity was assessed in poloxamer-407 (P-407) induced acute hyperlipidemic rat’s model. The antioxidant activity was assessed in vitro using 2, 2’-azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) radical scavenging, 1-diphenyl-2-dipicrylhydrazyl radical scavenging (DPPH) and ferric reducing antioxidant power (FRAP) assays. In addition, cytotoxicity of A. carambola extracts was assessed using MTS assay on four leukemic cell lines (human colon cancer, human promyeloid leukemia, erythroid leukemia, acute myeloid leukemia) and one normal cell (human umbilical vein endothelial cells). Results: Methanolic extract of leaves had the most potent antihyperlipidemic activity in P-407 model, whereby it significantly reduced serum levels of total cholesterol (P

Two flavanones named (2S)-7-Hydroxy-5-methoxy-6,8-dimethyl flavanone (1), (S)-5,7-dihydroxy-6,8-dimethyl-flavanone (2), along with known chalcone, namely, (E)-2ʹ,4ʹ- dihydroxy-6ʹ-methoxy-3ʹ,5ʹ-dimethylchalcone (3) and two triterpenoids, namely, betulinic and ursolic acids (4 and 5), were isolated from the leaves of Syzygium campanulatum Korth (Myrtaceae). The structures of compounds (1 and 2) were determined on the basis of UV-visible, FTIR, NMR spectroscopies and LC-EIMS analytical techniques. Furthermore, new, simple, precise, selective, accurate, highly sensitive, efficient and reproducible RP-HPLC method was developed and validated for the quantitative analysis of the compounds (1–5) from S. campanulatum plants of five different age. RP-HPLC method was validated in terms of specificity, linearity (r2 ≤ 0.999), precision (2.0% RSD), and recoveries (94.4%–105%). The LOD and LOQ of these compounds ranged from 0.13–0.38 and 0.10–2.23 μg·mL−1, OPEN ACCESS respectively. Anti-proliferative activity of isolated flavanones (1 and 2) and standardized extract of S. campanulatum was evaluated on human colon cancer (HCT 116) cell line. Compounds (1 and 2) and extract revealed potent and dose-dependent activity with IC50 67.6, 132.9 and 93.4 μg·mL−1, respectively. To the best of our knowledge, this is the first study on isolation, characterization, X-ray crystallographic analysis of compounds (1 and 2) and simultaneous RP-HPLC determination of five major compounds (1–5) from different age of S. campanulatum plants.

Tephrosia apollinea is a perennial shrublet widely distributed in Africa and is known to have medicinal properties. The current study describes the bio-assay (cytotoxicity) guided isolation of (-)-pseudosemiglabrin from the aerial parts of T. apollinea. The structural and stereochemical features have been described using spectral and x-ray crystallographic techniques. The cytotoxicity of isolated compound was evaluated against nine cancer cell lines. In addition, human fibroblast was used as a model cell line for normal cells. The results showed that (-)-pseudosemiglabrin exhibited dose-dependent antiproliferative effect on most of the tested cancer cell lines. Selectively, the compound showed significant inhibitory effect on the proliferation of leukemia, prostate and breast cancer cell lines. Further studies revealed that, the compound exhibited proapoptotic phenomenon of cytotoxicity. Interestingly, the compound did not display toxicity against the normal human fibroblast. It can be concluded that (-)-pseudosemiglabrin is worthy for further investigation as a potential chemotherapeutic agent.

Clinacanthus nutans, or Sabah snake grass (Belalai Gajah), is a small shrub from the family Acanthaceae. It has been used in folk medicine to cure various kinds of ailments such as snake bites, kidney failure and cancer. This study was conducted to investigate the initial phytochemical analysis like total phenolic, flavonoids, proteins and polysaccharides content determined by UV spectrophotometry and in vitro anticancer effect in five leaf extracts namely ethanolic, methanolic, 50% ethanolic, 50% methanolic, and water. The cytotoxic effect was evaluated, by the MTT test, on K562 chronic myeloid leukemia cells, HCT 116 colorectal carcinoma cells, and CCD-18Co normal colon fibroblasts. These extracts did not show significant cytotoxicity at 200 and 100 μg/ml on all tested cell lines. The methanolic extract was further fractionated by flash column chromatography to give 20 fractions, the cytotoxic effect of which was evaluated on HCT 116 cells. Significant cytotoxicity was achieved at 200 and 100 μg/ml in fractions number 3, 4, 14 and 16. The percentage inhibition at 200 μg/ml was 80±1.0% (F3), 34±4.2% (F4), 93±1.0 (F14) and 46±10% (F16). At 100 μg/ml, F14 showed 84±1.1% growth inhibition whereas the other fractions showed

Orthosiphon stamineus is a popular medicinal herbal tea that is traditionally used for inflammatory joint condition, diabetes and hypertension. In this study we found that the 50% ethanolic extract of O. stamineus strongly suppressed angiogenesis in isolated rat aortic tissues and prevented the formation of chorionic plexus in chick embryo. The extract also inhibited the formation of blood vessels in matrigel plug implanted in mice. A significant inhibition of important stages of HCT-116 colon cancer cells metastasis, invasion, and migration was also observed with significant inhibitory effect of on the growth of the neoplastic cells. However, the extract displayed low cytotoxicity towards human tumor cell lines such as K562, HL-60, Skno-1, MCF-7, HCT-116 and Hep G2, and normal human colonic fibroblast CCD-18Co. HPLC analysis reveals that the extract is abundant with rosmarinic acid, eupatorin, sinensetin, etc. This work highlights usefulness of O. stamineus in treating colon cancer. Note: This abstract was not presented at the conference. Citation Format: Fouad Saleih Alsuede, Aman Shah Abdul Majid, Khadeer Ahamed Mohamed B, Z Ismail, M.O Kadir, Amin Malik Shah Abdul Majid. Antiangiogenic and antimetastatic activities of cat's whiskers tea (Orthosiphon stamineus) extract against colon cancer cell line. [abstract]. In: Proceedings of the AACR Special Conference on Tumor Invasion and Metastasis; Jan 20-23, 2013; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2013;73(3 Suppl):Abstract nr B87.