Substances & Homeopatic Remedies

Solidago virga aurea

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Naunyn Schmiedebergs Arch Pharmacol. 2004 Mar;369(3):281-6. Epub 2004 Feb 13.   
Extracts from Rhois aromatica and Solidaginis virgaurea inhibit rat and human bladder contraction.
Borchert VE, Czyborra P, Fetscher C, Goepel M, Michel MC.
Medizinische Klinik, Universitatsklinikum Essen, Essen, Germany.

Since extracts from the plants Rhois aromatica and Solidaginis virgaurea are being used in the phytotherapy of bladder dysfunction including the overactive bladder syndrome, and since muscarinic receptors are the main pharmacological target in the treatment of bladder dysfunction, we have investigated whether these extracts can inhibit carbachol-induced, muscarinic receptor-mediated contraction of rat and human bladder. In vitro contraction experiments were performed with rat and human bladder strips. Radioligand binding and inositol phosphate accumulation studies were done with cells transfected with human M(2) or M(3) muscarinic receptors. Both extracts concentration-dependently (final concentrations 0.01-0.1%) inhibited carbachol-induced contraction of rat and human bladder with insurmountable antagonism. Radioligand binding experiments and inositol phosphate accumulation studies with cloned receptors demonstrated direct but non-competitive effects on muscarinic receptors. Reductions of KCl-induced bladder contraction demonstrated that inhibition by the higher extract concentrations also involved receptor-independent effects. We conclude that extracts from Rhois aromatica and Solidaginis virgaurea inhibit muscarinic receptor-mediated contraction of rat and human bladder. While this could contribute to the beneficial effects of these extracts in patients with bladder dysfunction, such therapeutic effects remain to be demonstrated in controlled clinical studies.

Nutr Cancer. 2002;43(1):76-81. Related Articles, Links  
Antineoplastic activity of Solidago virgaurea on prostatic tumor cells in an SCID mouse model.
Gross SC, Goodarzi G, Watabe M, Bandyopadhyay S, Pai SK, Watabe K.
Department of Medical Microbiology and Immunology, Southern Illinois University School of Medicine, Springfield, IL 62702, USA.

Solidago virgaurea (goldenrod) has traditionally been used as an anti-inflammatory herbal medicine for the treatment of various symptoms, including prostatic diseases. The plant has also been reported to have antibacterial, spasmolytic, and carminative properties. During the course of our screening for antineoplastic activities in various herbal plants, we found that the extract of S. virgaurea exhibits strong cytotoxic activities on various tumor cell lines. The active component mostly resides in the leaves of the plant and is soluble in water. When the extract was fractionated by a Sephadex G-100 column, the active fraction corresponded to a molecular weight of approximately 40,000. This cytotoxic activity is effective on various tumor cell lines, including human prostate (PC3), breast (MDA435), melanoma (C8161), and small cell lung carcinoma (H520). To examine the effect of the cytotoxic activity on tumor cells in vivo, we used the rat prostate cell line (AT6.1) and an SCID mouse model. AT6.1 cells were injected into the flank of SCID mice, and then the G-100 fraction of S. virgaurea was administered intraperitoneally or subcutaneously every 3 days. The size of the tumor was measured for up to 25 days. The growth of the tumor was significantly suppressed by the G-100 fraction at 5 mg/kg without any apparent side effects. Therefore, S. virgaurea is considered to be promising as an antineoplastic medicine with minimal toxicities.

Phytother Res. 2000 Feb;14(1):24-9
Ethnomedicinally selected plants as sources of potential analgesic compounds: indication of in vitro biological activity in receptor binding assays.
Sampson JH, Phillipson JD, Bowery NG, O'Neill MJ, Houston JG, Lewis JA.
Centre for Pharmacognosy, The School of Pharmacy, London University, WC1N 1AX, UK. julia.sampson@kcl.ac.uk

A number of plant species used in traditional medicine for the relief of pain have been selected from the medicinal and scientific literature of China, South America, Asia and West Africa. Extracts were prepared and tested in three in vitro receptor radioligand binding assays to determine whether there was an indication of biological activity, in particular their selectivity to a single receptor implicated in the mediation of pain. The three neuropeptide receptors chosen were Bradykinin (BK II), expressed in Chinese hamster ovary cells (CHO), neurokinin 1 (NK 1) expressed in astrocytoma cells, and calcitonin gene related peptide (CGRP) which were all implicated in the mediation of acute pain in the mammaliancentral nervous system. The plant species chosen to investigate were Ageratum conyzoides, Barringtonia edulis, Croton tiglium, Ipomea pes-caprae, Panax ginseng, Physostigma venenosum, Sinomenium acutum, Solidago virgaurea, Symplocos leptophylla and Typhonium giganteum. The results showed that there was a strong indication of biological activity for some of the plants which are used ethnomedicinally to treat pain, in the three in vitro receptor binding assays used, and particular plant extracts exhibited selective action to a single receptor. Copyright 2000 John Wiley & Sons, Ltd.

Acta Pol Pharm. 1991;48(5-6):35-7.
[Effect of flavonoid fractions of Solidago virgaurea L on diuresis and levels of electrolytes]
Chodera A, Dabrowska K, Sloderbach A, Skrzypczak L, Budzianowski J.
Katedra i Zaklad Farmakologii, Akademia Medyczna, Poznan.

The flavonoid fractions of Solidago virgaurea L.S. gigantea Ait., S. canadensis var. canadensis and S. canadensis var. "scabra" flowers were administrated p.o. to rats and showed diuretic activity. Increase in overnight diuresis reached 57-88%. Decrease of overnight excretion of potassium and sodium also occurred after administration of form examined fractions. The flavonoids from S. virgaurea and S. canadensis var. canadensis caused increased excretion of calcium with urine.