In vitro anticancer and antifungal properties of the essential oil from the leaves of Lippia origanoides kunth.

The essential oil from Lippia origanoides (EOLO) is employed in traditional medicine as it has both antimicrobial and anti-inflammatory properties. The current investigation first evaluated the EOLO's cytotoxic activity in tumour (SiHa and HT-29) and non-tumour (human lymphocyte) cells by MTT. The effect on ROS production was further evaluated in cancer cells by fluorimetry. The oil's mutagenic and antifungal activities were also evaluated using, respectively, the in vitro micronucleus test and the broth microdilution method. The EOLO displayed significant cytotoxicity in both cancer cell lines, with IC50 values of 20.2 µg/mL and 24.3 µg/mL for HT-29 and for SiHa cell lines, respectively. EOLO increased ROS production, was unable to raise the micronucleus frequencies and significantly reduced the cytokinesis block proliferation indices, revealing its anti-proliferative action. The results demonstrate that EOLO is devoid of mutagenic activity but possesses significant activity against tumour and non-tumour human cells, reinforcing its biological potential.

Corneal antinociceptive effect of (-)-α-bisabolol.

CONTEXT: (-)-α-Bisabolol (BISA) is a sesquiterpene alcohol widely used as scent in cosmetic preparations, perfumes, shampoos, toilet soaps and other toiletries with potential for use in the pharmaceutical area. OBJECTIVE: To evaluate the corneal antinociceptive efficacy of BISA and to analyze the best solubilizing agent. MATERIALS AND METHODS: Acute corneal nociception was induced by the local application of hypertonic saline (5 M NaCl; 20 µL) to the corneal surface of Swiss mice (n = 8/group) 60 min after topical treatment with solutions or ointment containing BISA (50-200 mg/mL). The number of eye wipes performed with the ipsilateral forepaw was counted for a period of 30 s. Control groups (vehicles) were included. RESULTS: BISA (50, 100 or 200 mg/mL) solubilized with Tween 80 did not reduce the number of eye wipes. Animals treated with the ointment (BISA 50, 100 or 200 mg/mL; p < 0.001), as well the solution containing propylene glycol (BISA 100 mg/mL; p < 0.05), showed significant reduction in the number of nociceptive behaviours. Solutions containing propylene glycol and isopropyl myristate had no effects. DISCUSSION AND CONCLUSION: BISA possess corneal antinociceptive activity. Although the ointment presented antinociceptive effect, it is concluded that BISA when associated with propylene glycol has better potential for corneal nociceptive pain since it is more comfortable to use, leading to greater acceptance by patients.

Effect of Ocimum gratissimum in Mouthrinses on De Novo Plaque Formation. A Randomized Clinical Trial.

The aim of this study was to evaluate the antiplaque effect of Ocimum gratissimum (Og) by in vivo investigation. Fifteen healthy volunteers participated in a crossover, double-blind clinical study, using a 3-day partial-mouth plaque accumulation model. The participants abolished any method of mechanical oral hygiene and they were randomly assigned to initially use just the following mouthrinses: distilled water (DW solution), 0.12% chlorhexidine digluconate (CLX solution) or 10% Og (Og solution). The plaque index (PLI) was recorded in all mandibular teeth at the end of the trial and the Kruskal-Wallis (α=0.05) and Mann-Whitney (α=0.05) tests were used to estimate the difference among groups. The clinical results showed statistically significant difference among the groups (p<0.05), favoring the CLX solution and Og solution, but the first was more effective (p<0.05). The mouthrinses containing 0.12% chlorhexidine digluconate and 10% Og were able to inhibit plaque re-growth, however Og showed more limited results in comparison to CLX.

Effect of Ocimum gratissimum in Mouthrinses on De Novo Plaque Formation. A Randomized Clinical Trial

Resumo O objetivo do presente estudo foi avaliar clinicamente em humanos o efeito antiplaca de Ocimum gratissimum (Og). Quinze adultos saudáveis participaram deste estudo cruzado, duplo-cego, por meio de um modelo de acúmulo de placa parcial de 3 dias. Os voluntários aboliram qualquer método mecânico de higiene oral e foram inicialmente designados para usar os seguintes enxaguatórios bucais: água destilada (solução AD), digluconato de clorexidina a 0,12% (solução CLX) ou 10% Og (solução Og). O índice de placa (IPL) foi registrado em todos os dentes inferiores no final do experimento e os testes estatísticos Kruskal-Wallis (α=0,05) e Mann-Whitney (α=0,05) foram utilizados para estimar a diferença entre os grupos. Os resultados clínicos demonstraram diferença estatisticamente significante entre os três grupos (p<0,05), favorecendo os grupos CLX e Og; entretanto o grupo CLX foi mais efetivo que o grupo Og (p<0,05). Os enxaguatórios bucais contendo digluconato de clorexidina e Og a 10% foram capazes de reduzir a formação de nova placa bacteriana, mas Og mostrou resultados mais limitados em comparação ao digluconato de clorexidina.

Abstract The aim of this study was to evaluate the antiplaque effect of Ocimum gratissimum (Og) by in vivo investigation. Fifteen healthy volunteers participated in a crossover, double-blind clinical study, using a 3-day partial-mouth plaque accumulation model. The participants abolished any method of mechanical oral hygiene and they were randomly assigned to initially use just the following mouthrinses: distilled water (DW solution), 0.12% chlorhexidine digluconate (CLX solution) or 10% Og (Og solution). The plaque index (PLI) was recorded in all mandibular teeth at the end of the trial and the Kruskal-Wallis (α=0.05) and Mann-Whitney (α=0.05) tests were used to estimate the difference among groups. The clinical results showed statistically significant difference among the groups (p<0.05), favoring the CLX solution and Og solution, but the first was more effective (p<0.05). The mouthrinses containing 0.12% chlorhexidine digluconate and 10% Og were able to inhibit plaque re-growth, however Og showed more limited results in comparison to CLX.

Avaliação do efeito do extrato da casca do cajueiro sobre microrganismos de biofilme subgengival. Estudo experimental in vitro / Evaluation of the activity of Anacardium occidentale on microorganisms of subgingival biofilm: experimental study in vitro

O objetivo deste estudo foi avaliar o efeito do extrato hidroalcoólico da casca do cajueiro (AO) sobre amostras microbiológicas de biofilme subgengival. Estas foram coletadas de bolsa periodontal, colocadas em meio de cultura líquido BHI pré-reduzido (Brain Heart Infusion) e triplicadas em placas de ágar-sangue contendo discos imersos em diferentes concentrações do extrato hidroalcoólico da casca do cajueiro (12,5% e 50%), em solução de digluconato de clorexidina a 0,12% e em solução salina a 0,9%. Independente da concentração utilizada, o AO não apresentou efeito sobre o crescimento bacteriano, de forma semelhante à solução salina e diferente da solução de digluconato de clorexidina a 0,12%, que demonstrou um halo de inibição de 11 mm. Assim, o extrato hidroalcoólico da casca do cajueiro não exerceu efeito inibitório in vitro sobre amostras microbiológicas de biofilme subgengival.

The aim of this study was to evaluate the effect of the Anacardium occidentale (AO) hydroalcoholic extract on oral microorganisms from subgingival biofilm. They were immerged in a pre-reduced BHI (Brain Heart Infusion) and distributed in plates containing agar-sanguis in contact with various solutions: 0.9% saline; 0.12% chlorhexidine digluconate; 12.5% and 50% AO. The saline solution had no effect on bacterial growth in a similar manner than AO, independently of its concentration. 0.12% chlorhexidine digluconate showed an expressive inhibition hale (11mm). Then, AO did not show inhibitory effect in vitro on microorganisms from subgingival biofilm

Avaliação dos extratos de anacardium occidentale linn e lippia sidoides cham no processo de cicatrização tecidual. Estudo histológico em dorso de ratos / Evaluation of extracts from Anacardium occidentale Linn. and Lippia sidoides Cham. on wound healing process. Histological study in rats

O objetivo deste trabalho foi avaliar histologicamente o efeito dos géis contendo extratos de Anacardium occidentale Linn. (AO) e Lippia sidoides Cham.(LS) no reparo tecidual de feridas cutâneas em dorso de ratos. Dezoito ratos da raça Wistar foram divididos aleatoriamente em três grupos de seis animais cada, de acordo com o período experimental: Grupo 1 (n = 6), sacrificados no 1º dia; Grupo 2 (n = 6), sacrificados no 7º dia e grupo 3 (n = 6), sacrificados no 10º dia. Quatro feridas cutâneas foram realizadas por meio de escarificação utilizando bisturi com lâmina nº 10 no dorso dos animais e sobre elas foram aplicadas topicamente em dose única diária, uma das quatro substâncias. Estabeleceu-se o seguinte protocolo: grupo A (perfuração superior, lado esquerdo) – gel placebo (Carbopol); grupo B (perfuração inferior, lado esquerdo) – gel de digluconato de clorexidina a 2%; grupo C (perfuração superior, lado direito) – gel de AO a 10%; grupo D (perfuração inferior, lado direito) – gel de LS a 10%. Não houve diferença qualitativa e quantitativa no processo de cicatrização entre os grupos nos dias 1 e 10 (p>0,05), porém aos 7 dias os géis contendo os fitoterápicos mostraram resultados mais favoráveis (p<0,05), apresentando uma cicatrização mais rápida neste período

The aim of this study was to evaluate, by histological analysis, the effect of gels containing extracts of Anacardium occidentale Linn and Lippia sidoides Cham on wound healing in Wistar rats. Eighteen rats were randomly divided into three groups with six animals each: Group 1 (n = 6) sacrificed on 1st day, Group 2 (n = 6) sacrificed on 7th day and group 3 (n = 6) sacrificed on 10th day. Four wounds were made by scraping using a scalpel blade #10 on the dorsum of the animals, and one of the four substances applied once a day, following the protocol: group A (upper wound, left side) – placebo gel (Carbopol); group B (bottom wound, left side) – 2% chlorhexidine digluconate gel; group C (upper wound, right side) – 10% Anacardium occidentale Linn gel; group D (bottom wound, right side) – 10% Lippia sidoides Cham gel. There were no qualitative and quantitative differences in the healing process among groups on days 1 and 10 (p>0.05), but on day 7 the herbal gels showed more favorable results (p<0.05), improving the wound healing in this period

Antiplaque and antigingivitis effect of Lippia Sidoides: a double-blind clinical study in humans.

OBJECTIVES: The antiplaque and antigingivitis effect of Lippia Sidoides (LS) was evaluated in this in vivo investigation. MATERIAL AND METHODS: Twenty-three subjects participated in a cross-over, double-blind clinical study, using 21-day partial-mouth experimental model of gingivitis. A toothshield was constructed for each volunteer, avoiding the brushing of the 4 experimental posterior teeth in the lower left quadrant. The subjects were randomly assigned initially to use either the placebo gel (control group) or the test gel, containing 10% LS (test group). RESULTS: The clinical results showed statistically significant differences for plaque index (PLI) (p<0.01) between days 0 and 21 in both groups, however only the control group showed statistically significant difference (p<0.01) for the bleeding (IB) and gingival (GI) index within the experimental period of 21 days. On day 21, the test group presented significantly better results than the control group with regard to the GI (p<0.05). CONCLUSIONS: The test gel containing 10% LS was effective in the control of gingivitis.

Antiplaque and antigingivitis effect of Lippia Sidoides: a double-blind clinical study in humans

OBJECTIVES: The antiplaque and antigingivitis effect of Lippia Sidoides (LS) was evaluated in this in vivo investigation. MATERIAL AND METHODS: Twenty-three subjects participated in a cross-over, double-blind clinical study, using 21-day partial-mouth experimental model of gingivitis. A toothshield was constructed for each volunteer, avoiding the brushing of the 4 experimental posterior teeth in the lower left quadrant. The subjects were randomly assigned initially to use either the placebo gel (control group) or the test gel, containing 10 percent LS (test group). RESULTS: The clinical results showed statistically significant differences for plaque index (PLI) (p<0.01) between days 0 and 21 in both groups, however only the control group showed statistically significant difference (p<0.01) for the bleeding (IB) and gingival (GI) index within the experimental period of 21 days. On day 21, the test group presented significantly better results than the control group with regard to the GI (p<0.05). CONCLUSIONS: The test gel containing 10 percent LS was effective in the control of gingivitis.

Efeito de diferentes concentrações do extrato hidroalcoólico de alecrim-pimenta sobre amostras microbiológicas de biofilme supragengival - estudo experimental in vitro / Antiplaque effect of the Lippia sidoides hidrooalcholic extract. An in vitro study

O objetivo deste estudo foi avaliar o efeito de diferentes concentrações do extrato hidroalcoólico de alecrim-pimenta sobre amostras microbiológicas, comparando-o com uma solução de digluconato de clorexidina a O,12%. Estas amostras foram obtidas de um biofilme supragengival com uma semana de colonização, colocadas em meio de cultura BHI (Brain Heart Infusion) e replicadas em placas de ágar ûsangue contendo discos imersos em diferentes concentrações do extrato de alecrim-pimenta (0,1%, 0,5 %, 1%, 2%, 5% e 10%), em solução de clorexidina a O,12%, em solução salina e em álcool absoluto. As concentrações a partir de 2% demonstraram halo de inibição semelhante à dorexidina, enquanto que a solução alcoólica e de soro fisiológico não apresentaram efeito inibitório no crescimento bacteriano. Portanto, o extrato hidroalcoólico do óleo essencial de alecrim-pimenta nas concentrações de 2%, 5% e 10% exerceu efeito inibitório "invitro" sobre amostras microbiológicas de biofilme supragengival de forma similar à solução de clorexidina a 0,12%.