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Clinical, Cosmetic and Investigational... 2023Plica neuropathica (PN), also known as plica polonica, trichoma, matting, felting, or bird's nest hair, is a common but rarely reported hair disorder. It is...
Plica neuropathica (PN), also known as plica polonica, trichoma, matting, felting, or bird's nest hair, is a common but rarely reported hair disorder. It is characterized by the abrupt onset of irreversible hair entanglement, forming a densely matted hair mass. PN has been associated with the use of ionic or herbal shampoos, vigorous hair care practice, self-neglect, systemic infection, parasitic infestation, immunosuppressive drugs, and psychiatric conditions. However, literature supporting the coexistence of PN in psychiatric disorders is scarce. PN may be one of the presenting symptoms observed by physicians. In some cases of psychiatric illness, patients consult more readily with non-mental health professionals than psychologists or psychiatrists. To highlight this issue, we herein report a case of PN in a 32-year-old woman with a 1-month history of being unable to detangle her hair. The patient initially visited the dermatology department and was subsequently diagnosed with schizophrenia following psychiatric consultation. After establishing the fundamental diagnosis apparently underlying the PN, psychiatric treatment with antipsychotic medication and dermatological treatment of the hair condition were instituted. There was an improvement in both at the four-week follow-up. This case history highlights a rare presentation of schizophrenia.
PubMed: 37519940
DOI: 10.2147/CCID.S414564 -
Polymers Jul 2023This work investigates the effect of dilution on the phase separation process of binary charged polysaccharide-surfactant mixtures formed by two cationic polysaccharides...
This work investigates the effect of dilution on the phase separation process of binary charged polysaccharide-surfactant mixtures formed by two cationic polysaccharides and up to four surfactants of different nature (anionic, zwitterionic, and neutral), as well as the potential impact of dilution-induced phase separation on the formation of conditioning deposits on charged surfaces, mimicking the negative charge and wettability of damaged hair fibers. The results obtained showed that the dilution behavior of model washing formulations (concentrated polysaccharide-surfactant mixtures) cannot be described in terms of a classical complex precipitation framework, as phase separation phenomena occur even when the aggregates are far from the equilibrium phase separation composition. Therefore, dilution-enhanced deposition cannot be predicted in terms of the worsening of colloidal stability due to the charge neutralization phenomena, as common phase separation and, hence, enhanced deposition occurs even for highly charged complexes.
PubMed: 37514401
DOI: 10.3390/polym15143011 -
Biomimetics (Basel, Switzerland) Jul 2023In this study, we developed a hair-coating polyphenol complex (PPC) that showed ultraviolet (UV) protection properties, antistatic features, and the capability to...
In this study, we developed a hair-coating polyphenol complex (PPC) that showed ultraviolet (UV) protection properties, antistatic features, and the capability to enhance the mechanical strength of damaged hair. PPCs prepared with different ratios of tannic acid (TA), gallic acid (GA), and caffeic acid (CA) simultaneously increased the self-recovery of damaged hair by protecting the cuticle. PPC prevented light from passing through the damaged hair during exposure to UV radiation. Moreover, surfaces coated with PPC1 (TA:GA:CA, 100:20:0.5) exhibited a higher conductivity than surfaces coated with PPCs with other ratios of TA, GA, and CA, with a resistance of 0.72 MΩ. This influenced the antistatic performance of the surface, which exhibited no electrical attraction after being subjected to an electrostatic force. Additionally, damaged hair exhibited a significant increase in durability and elasticity after coating with a PPC1-containing shampoo, with a tensile strain of up to 2.06× post-treatment, indicating the recovery of the damaged cuticle by the PPC complex. Furthermore, PPC1-containing shampoo prevented damage by scavenging excess reactive oxygen species in the hair. The combination effect promoted by the natural PPC offers new insights into hair treatment and paves the way for further exploration of hair restoration technology.
PubMed: 37504184
DOI: 10.3390/biomimetics8030296 -
Chemical Science Jun 2023Polymers in liquid formulations, or PLFs, are present in many of the products we use, from the shampoo we use to wash our hair, to the paint on the walls, and the...
Polymers in liquid formulations, or PLFs, are present in many of the products we use, from the shampoo we use to wash our hair, to the paint on the walls, and the lubricants in our car. They provide high functionality in these and a multitude of other applications, delivering many positive benefits to society. They are essential to global markets worth more than $1 trillion and so large quantities of these materials are made and sold each year - 36.3 million metric tonnes, the volume of 14 500 Olympic sized swimming pools! The chemical industry and the wider supply chain therefore have a responsibility to ensure that the way PLFs are made, used and disposed of at their end of life has a minimal effect on the environment. To date this seems to be a 'hidden problem', not receiving the same attention as other polymer related products, such as plastic packaging waste, yet there are clear challenges to address the sustainability concerns for these materials. To ensure that the PLF industry is economically and environmentally sustainable in the future, some key challenges need to be addressed, ensuring that new approaches to PLF production, use and end-of-life treatment are developed and utilised. Collaboration is key here, and with the UK already possessing a wealth of world-leading expertise and capability, there is an opportunity to leverage this in a coherent, focussed way to improve the overall environmental profile of these products.
PubMed: 37389259
DOI: 10.1039/d3sc90086j -
Journal of Cutaneous and Aesthetic... 2023Silicones aka siloxanes are synthetic compounds, which contain siloxane bonds, i.e., the repeat unit -Si-O- with organic side groups such as methyl, ethyl, propyl,... (Review)
Review
Silicones aka siloxanes are synthetic compounds, which contain siloxane bonds, i.e., the repeat unit -Si-O- with organic side groups such as methyl, ethyl, propyl, phenyl, fluoroalkyl, aminoalkyl, hydroxy, mercapto, hydrogen, and vinyl attached to the silicon atoms. They have ability to create short, long, or complex organosilicone oligomer and polymer particles. The siloxane bond in silicone is very strong and highly stable with nontoxic, noncarcinogenic, and hypoallergic properties. Silicone compounds have become one of the key ingredients in various skin care products namely moisturizers, sunscreen, color cosmetics, hair shampoos, etc. This review focuses on an update on various indications of silicone in dermatology. For this review, the literature search was conducted using keywords such as silicone and role of silicone.
PubMed: 37383974
DOI: 10.4103/JCAS.JCAS_204_22 -
Metabolites May 2023We are surrounded by factors called free radicals (FR), which attach to the molecules our body is made of, first among them the endothelium. Even though FR are to a... (Review)
Review
We are surrounded by factors called free radicals (FR), which attach to the molecules our body is made of, first among them the endothelium. Even though FR are to a certain extent a normal factor, nowadays we face an escalating increase in these biologically aggressive molecules. The escalating formation of FR is linked to the increased usage of man-made chemicals for personal care (toothpaste, shampoo, bubble bath, etc.), domestic laundry and dish-washer detergents, and also an ever wider usage of drugs (both prescription and over the counter), especially if they are to be used long-term (years). In addition, tobacco smoking, processed foods, pesticides, various chronic infectious microbes, nutritional deficiencies, lack of sun exposure, and, finally, with a markedly increasing impact, electromagnetic pollution (a terribly destructive factor), can increase the risk of cancer, as well as endothelial dysfunction, owing to the increased production of FR that they cause. All these factors create endothelial damage, but the organism may be able to repair such damage thanks to the intervention of the immune system supported by antioxidants. However, one other factor can perpetuate the state of inflammation, namely obesity and metabolic syndrome with associated hyperinsulinemia. In this review, the role of FR, with a special emphasis on their origin, and of antioxidants, is explored from the perspective of their role in causing atherosclerosis, in particular at the coronary level.
PubMed: 37367870
DOI: 10.3390/metabo13060712 -
Skin Research and Technology : Official... Jun 2023The process of hair dyeing causes hair damage, and periodic re-dyeing is required for newly grown hair. To avoid these hassles, hair color shampoos have been developed...
BACKGROUND
The process of hair dyeing causes hair damage, and periodic re-dyeing is required for newly grown hair. To avoid these hassles, hair color shampoos have been developed and are widely used. In this study, we compared the effects of two hair color shampoos with different dyeing principles to analyze the function of hair color shampoos. We analyzed hair tresses treated by hair-oxidation- and hair-coating-based shampoos.
MATERIALS AND METHODS
We measured the color, tensile properties, softness, elasticity, gloss, moisture content, and protein content of the hair tresses dyed with color shampoos. The hair structures were analyzed by scanning and transmission electron microscopies (SEM and TEM) and a hydroxy radical-based method.
RESULTS
The shampoo based on hair coating enhanced the hair dyeing effect and roughness, whereas that based on hair oxidation improved the color retention and moisture content in the hair tresses. Frictional resistance, gloss, and elasticity of the hair tresses were similar for the two products. However, according to the results of the protein loss test, TEM, and hydroxyl radical staining, the shampoo based on hair oxidation showed a longer dyeing retention compared to that based on hair coating but caused cuticle damage.
CONCLUSION
These results show that the two shampoos with different dyeing principles exhibit different hair dyeing abilities and hair health indices. Therefore, we recommend that hair color shampoos should be used according to the requirements of an individual.
Topics: Humans; Hair Preparations; Coloring Agents; Hair; Proteins
PubMed: 37357647
DOI: 10.1111/srt.13383 -
PloS One 2023Head louse infestations remain a global public-health concern due to increased resistance of lice to artificial pediculicides. In Thailand, there is a lack of...
Head louse infestations remain a global public-health concern due to increased resistance of lice to artificial pediculicides. In Thailand, there is a lack of comparative data on the current efficacy of pediculicides for treating head lice. In this study, we explored the status of botanical and toxic synthetic pediculicides with that of 4% dimeticone liquid gel for treating head lice in Thailand. The ex-vivo pediculicidal activity of various pediculicidal shampoos available at drugstores in Thailand was assessed and compared with that of 4% dimeticone liquid gel. The shampoos chosen were based on active ingredients toxic to lice (1% permethrin, 0.6% carbaryl, 0.15% Stemona root crude extract, or mixed plant extracts), whereas dimeticone acts physically on lice. We found that exposure to 4% dimeticone liquid gel following the manufacturer's instructions completely killed 100% of head lice in 15 min, whereas other pediculicide products failed to kill the great majority of head lice, whether treatment was for 10 min (resulting in 0% to 50.0% mortality) or 30 min (resulting in 17.0% to 60.0% mortality). We also extended a clinical assessment to confirm the efficacy of 1% permethrin for treating head lice in infested schoolchildren. In this clinical assessment, none of the 26 children treated with 1% permethrin shampoo achieved a cure after two applications. These results highlight that 4% dimeticone demonstrated a higher ex-vivo pediculicidal efficacy compared to both chemical and botanical pediculicides in Thailand. Conversely, 1% permethrin showed low efficacy in both laboratory and clinical assessments. Given its physical mode of action, 4% dimeticone merits consideration as an alternative treatment option for lice in Thailand, particularly in cases where treatment with toxic pediculicides has proven ineffective.
Topics: Animals; Child; Humans; Pediculus; Permethrin; Insecticides; Thailand; Lice Infestations; Dermatologic Agents
PubMed: 37352268
DOI: 10.1371/journal.pone.0287616 -
Canadian Family Physician Medecin de... Jun 2023
Topics: Humans; Hair Dyes; Beauty; Skin; Acute Disease; Hepatitis
PubMed: 37315966
DOI: 10.46747/cfp.6906403 -
The Journal of Clinical and Aesthetic... May 2023There are studies in the literature on zinc pyrithione and selenium disulfide containing shampoos for the treatment of seborrheic dermatitis, but we have not been able... (Review)
Review
BACKGROUND
There are studies in the literature on zinc pyrithione and selenium disulfide containing shampoos for the treatment of seborrheic dermatitis, but we have not been able to find a study that clearly evaluates the duration of relapses.
OBJECTIVE
This retrospective chart review investigated disease relapse times in patients with seborrheic dermatitis who achieved remission with treatment and continued maintenance therapy using zinc pyrithione or selenium disulfide containing shampoo.
METHODS
Records from a total of 400 patients were reviewed, with 200 patients having used zinc pyrithione shampoo and 200 patients having used selenium disulfide shampoo.
RESULTS
There was no statistically significant difference between the patients who relapsed in less than a month and patients that relapsed after more than a month in terms of product used in maintenance therapy (=0.841).
DISCUSSION
In our study, we found that zinc pyrithione and selenium disulfide shampoos used in maintenance therapy did not have significantly different effects on relapse times in patients who achieved remission after appropriate treatment.
PubMed: 37288280
DOI: No ID Found