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Cigarette smoking has been linked to the diagnosis of bacterial vaginosis (BV) and other genital infections including herpes simplex virus type 2, Chlamydia trachomatis, and oral and genital human papillomavirus (HPV). Nicotine’s major metabolite, cotinine, has been found to concentrate in cervical mucus.
In 2014, researchers from Montana State University confirmed that the composition of the vaginal microbiota is “strongly associated with smoking.” They reported that women whose vaginal microbiota lacked significant numbers of Lactobacillus spp were 25-fold more likely to report current smoking than those with microbiota dominated by Lactobacillus crispatus (L crispatus). The researchers note that most Lactobacillus spp are thought to provide broad-spectrum protection to pathogenic infections by reducing vaginal pH.
But what is the mechanistic link between smoking and its effects on the vaginal microenvironment? The researchers conducted further study to assess the metabolome, a set of small molecule chemicals that includes host and microbial-produced and modified biomolecules as well as exogenous chemicals. The metabolome is an important characteristic of the vaginal microenvironment; the researchers say; differences in some metabolites are associated with functional variations of the vaginal microbiota.
The analysis revealed samples clustered into 3 community state types (CSTs): CST-I (L crispatus dominated), CST-III (L iners dominated) and CST-IV (low Lactobacillus). Overall, smoking did not affect the vaginal metabolome after controlling for CSTs, but the researchers identified “an extensive and diverse range” of vaginal metabolites for which profiles were affected by both the microbiology and smoking status. They found 607 compounds in 36 women, including 12 metabolites that differed significantly between smokers and nonsmokers. Bacterial composition was the most pronounced driver of the vaginal metabolome, they say, associated with changes in 57% of all metabolites. As expected, nicotine, cotinine, and hydroxycotinine were markedly elevated in smokers’ vaginas.
Another “key finding,” the researchers say, was a significant increase in the abundance of various biogenic amines among smokers, far more pronounced in women with a low level of Lactobacillus. Biogenic amines are essential, they note, to mammalian and bacterial physiology. (Several are implicated in the “fishy” odor of BV.)
Their study serves as a pilot study, the researchers say, for future examinations of the connections between smoking and poor gynecologic and reproductive health outcomes.
Cigarette smoking has been linked to the diagnosis of bacterial vaginosis (BV) and other genital infections including herpes simplex virus type 2, Chlamydia trachomatis, and oral and genital human papillomavirus (HPV). Nicotine’s major metabolite, cotinine, has been found to concentrate in cervical mucus.
In 2014, researchers from Montana State University confirmed that the composition of the vaginal microbiota is “strongly associated with smoking.” They reported that women whose vaginal microbiota lacked significant numbers of Lactobacillus spp were 25-fold more likely to report current smoking than those with microbiota dominated by Lactobacillus crispatus (L crispatus). The researchers note that most Lactobacillus spp are thought to provide broad-spectrum protection to pathogenic infections by reducing vaginal pH.
But what is the mechanistic link between smoking and its effects on the vaginal microenvironment? The researchers conducted further study to assess the metabolome, a set of small molecule chemicals that includes host and microbial-produced and modified biomolecules as well as exogenous chemicals. The metabolome is an important characteristic of the vaginal microenvironment; the researchers say; differences in some metabolites are associated with functional variations of the vaginal microbiota.
The analysis revealed samples clustered into 3 community state types (CSTs): CST-I (L crispatus dominated), CST-III (L iners dominated) and CST-IV (low Lactobacillus). Overall, smoking did not affect the vaginal metabolome after controlling for CSTs, but the researchers identified “an extensive and diverse range” of vaginal metabolites for which profiles were affected by both the microbiology and smoking status. They found 607 compounds in 36 women, including 12 metabolites that differed significantly between smokers and nonsmokers. Bacterial composition was the most pronounced driver of the vaginal metabolome, they say, associated with changes in 57% of all metabolites. As expected, nicotine, cotinine, and hydroxycotinine were markedly elevated in smokers’ vaginas.
Another “key finding,” the researchers say, was a significant increase in the abundance of various biogenic amines among smokers, far more pronounced in women with a low level of Lactobacillus. Biogenic amines are essential, they note, to mammalian and bacterial physiology. (Several are implicated in the “fishy” odor of BV.)
Their study serves as a pilot study, the researchers say, for future examinations of the connections between smoking and poor gynecologic and reproductive health outcomes.
Cigarette smoking has been linked to the diagnosis of bacterial vaginosis (BV) and other genital infections including herpes simplex virus type 2, Chlamydia trachomatis, and oral and genital human papillomavirus (HPV). Nicotine’s major metabolite, cotinine, has been found to concentrate in cervical mucus.
In 2014, researchers from Montana State University confirmed that the composition of the vaginal microbiota is “strongly associated with smoking.” They reported that women whose vaginal microbiota lacked significant numbers of Lactobacillus spp were 25-fold more likely to report current smoking than those with microbiota dominated by Lactobacillus crispatus (L crispatus). The researchers note that most Lactobacillus spp are thought to provide broad-spectrum protection to pathogenic infections by reducing vaginal pH.
But what is the mechanistic link between smoking and its effects on the vaginal microenvironment? The researchers conducted further study to assess the metabolome, a set of small molecule chemicals that includes host and microbial-produced and modified biomolecules as well as exogenous chemicals. The metabolome is an important characteristic of the vaginal microenvironment; the researchers say; differences in some metabolites are associated with functional variations of the vaginal microbiota.
The analysis revealed samples clustered into 3 community state types (CSTs): CST-I (L crispatus dominated), CST-III (L iners dominated) and CST-IV (low Lactobacillus). Overall, smoking did not affect the vaginal metabolome after controlling for CSTs, but the researchers identified “an extensive and diverse range” of vaginal metabolites for which profiles were affected by both the microbiology and smoking status. They found 607 compounds in 36 women, including 12 metabolites that differed significantly between smokers and nonsmokers. Bacterial composition was the most pronounced driver of the vaginal metabolome, they say, associated with changes in 57% of all metabolites. As expected, nicotine, cotinine, and hydroxycotinine were markedly elevated in smokers’ vaginas.
Another “key finding,” the researchers say, was a significant increase in the abundance of various biogenic amines among smokers, far more pronounced in women with a low level of Lactobacillus. Biogenic amines are essential, they note, to mammalian and bacterial physiology. (Several are implicated in the “fishy” odor of BV.)
Their study serves as a pilot study, the researchers say, for future examinations of the connections between smoking and poor gynecologic and reproductive health outcomes.