Onycholysis in patients treated with docetaxel

Prenatal diesel exhaust exposure alters hippocampal synaptic plasticity in offspring

Diesel exhaust particles (DEPs) are major air pollutants emitted from automobile engines. Prenatal exposure to DEPs has been linked to neurodevelopmental and neurodegenerative diseases associated with aging. However, the specific mechanism by DEPs impair the hippocampal synaptic plasticity in the offspring remains unclear. Pregnant C57BL/6 mice were administered DEPs solution via the tail vein every other day for a total of 10 injections, then the male offsprings were studied to assess learning and memory by the Morris water maze. Additionally, protein expression in the hippocampus, including CPEB3, NMDAR (NR1, NR2A, NR2B), PKA, SYP, PSD95, and p-CREB was analyzed using Western blotting and immunohistochemistry. The alterations in the histomorphology of the hippocampus were observed in male offspring on postnatal day 7 following prenatal exposure to DEPs. Furthermore, 8-week-old male offspring exposed to DEPs during prenatal development exhibited impairments in the Morris water maze test, indicating deficits in learning and memory. Mechanistically, the findings from our study indicate that exposure to DEPs during pregnancy may alter the expression of CPEB3, SYP, PSD95, NMDAR (NR1, NR2A, and NR2B), PKA, and p-CREB in the hippocampus of both immature and mature male offspring. The results offer evidence for the role of the NMDAR/PKA/CREB and CPEB3 signaling pathway in mediating the learning and memory toxicity of DEPs in male offspring mice. The alterations in signaling pathways may contribute to the observed damage to synaptic structure and transmission function plasticity caused by DEPs. The findings hold potential for informing future safety assessments of DEPs.

Dermatological adverse events with taxane chemotherapy

Taxanes (docetaxel and paclitaxel) are among the most commonly prescribed anticancer drugs approved for the treatment of metastatic or locally advanced breast, non-small cell lung, prostate, gastric, head and neck, and ovarian cancers, as well as in the adjuvant setting for operable node-positive breast cancers. Although the true incidence of dermatological adverse events (AEs) in patients receiving taxanes is not known, and has never been prospectively analysed, they clearly represent one of the major AEs associated with these agents. With an increase in the occurrence of cutaneous AEs during treatment with novel targeted and immunological therapies when used in combination with taxanes, a thorough understanding of reactions attributable to this class is imperative. Moreover, identification and management of dermatological AEs is critical for maintaining the quality of life in cancer patients and for minimizing dose modifications of their antineoplastic regimen. This analysis represents a systematic review of the dermatological conditions reported with the use of these drugs, complemented by experience at comprehensive cancer centres. The conditions reported herein include skin, hair, and nail toxicities. Lastly, we describe the dermatological data available for the new, recently FDA-and EMA- approved, solvent-free nab-paclitaxel.

Nail Toxicity Induced by Cancer Chemotherapy

Purpose. To provide a comprehensive literature review of chemotherapy-induced nail toxicity, including clinical presentation, implicated drugs and approaches for prevention and management.

Data sources. A search of MEDLINE and EMBASE (1966—2008) databases was conducted using the terms (and variations of the terms) antineoplastic agents, nails, nail toxicity, onycholysis, and paronychia. Bibliographies from selected articles were reviewed for appropriate references.

Data extraction. The retrieved literature was reviewed to include all articles relevant to the clinical presentation, diagnosis, incidence, prevention, and treatment of chemotherapy-induced nail toxicity.

Data synthesis. Nail toxicity is a relatively uncommon adverse effect linked to a number of chemotherapeutic agents. Clinical presentation varies, depending on which nail structure is affected and the severity of the insult. Nail changes may involve all or some nails. Toxicity may be asymptomatic and limited to cosmetic concerns, however, more severe effects, involving pain and discomfort can occur. Taxanes and anthracyclines are the antineoplastic drug groups most commonly implicated. It is suggested that the administration schedule may influence the incidence of nail abnormalities, for example reported cases linked to the weekly administration of paclitaxel.

Before instituting chemotherapy, patients should be educated regarding potential nail toxicities and strategies for prevention implemented. Management includes appropriate nail cutting, avoiding potential irritants, topical, or oral antimicrobials, and possibly cessation or dose reduction of the offending agent. Cryotherapy, through the application of frozen gloves or socks, has been beneficial in reducing docetaxel-induced nail toxicity and may be effective for other drugs. J Oncol Pharm Practice (2009) 15: 143—155.

Chemotherapy-induced dermatological toxicity: frequencies and impact on quality of life in women’s cancers. Results of a prospective study

PURPOSE

The study aimed to determine the prevalence of dermatological side effects and its impact on quality of life in patients receiving systemic chemotherapy for women's cancers.

MATERIALS AND METHODS

A prospective study was conducted on patients with histologically confirmed advanced women's cancers who were deemed candidates for adjuvant or palliative chemotherapy. Patients were systemically examined for skin, hair, and nail side effects. The impact of those side effects on their quality of life was assessed using the health-related quality of life score (HRQL).

RESULTS

Between April 2001 and October 2001, 91 patients received 1 to 17 (median 4) courses of chemotherapy. Malignancies included breast cancer (n = 39, 43%), ovarian cancer (n = 32, 35%), cervical cancer (n = 12, 13%), endometrial cancer (n = 5, 6%), fallopian tube cancer (n = 2, 2%), and vaginal cancer (n = 1, 1%). Chemotherapy agents included taxanes (n = 42, 46%), PEG doxorubicin (n = 17, 7%), other anthracyclines (epirubicin and doxorubicin; n = 6, 19%), topotecan (n = 13, 14%), and other agents (n = 13, 14%). Overall incidence of skin, nail, and hair side effects was 86.8% (n = 79). Seventeen patients (18.7%) developed a palmo-plantar erythrodysesthesia (PPE), and nine of those (53%) were of grade 3 in common toxicity criteria scale (NCI). Twenty-one patients (23.1%) developed nail changes such as subungual hematomas, onycholysis, and leukonychias or nail loss, while 69 (75.8%) developed hair loss. There was a higher incidence of PPE in patients receiving chemotherapy for palliation rather than cure (percent over percent, p < 0.001, Fisher's exact test). Using the HRQL score, skin changes were the most frequently reported unpleasant side effect (34.1%), and of those patients who developed PPE, this was reported by n = 8 (47%) as the most unpleasant.

CONCLUSIONS

Dermatological chemotherapy side effects are frequent after treatment of women's cancers and have a major impact on quality of life as assessed by HRQL. Counseling of patients with women's cancers and the profile of side effects of chemotherapeutic agents should be considered before considering an adjuvant or palliative chemotherapy regimen.

Nail changes due to docetaxel--a neglected side effect and nuisance for the patient

GOALS OF WORK

The objective of this study is to estimate the frequency and severity of nail changes due to treatment with the cytotoxic drug docetaxel and, secondly, to estimate how the nail changes effects the patients cosmetically and functionally in their daily activities. Finally, we want to clarify whether fungal infection could contribute in causing the nail changes.

MATERIALS AND METHODS

Fifty-five patients with metastatic breast cancer in treatment with the cytotoxic drug docetaxel participated in the study. They filled out two questionnaires about their experience with possible nail changes. The frequency of fungal infection was examined. At each of the two visits, information about the number of treatment cycles, dose of docetaxel the patient received, frequency of lymph oedema, previous treatment with chemotherapy and the reason of discontinuance of treatment, if relevant, were registered. Finally, photos were taken to document the nail changes in hands and feet.

MAIN RESULTS

Fifty-eight percent had some degree of nail changes and an increase to 88.5% was seen after three additional cycles. A large proportion of the patients experienced the nail changes as a cosmetic nuisance, and more than 32% had functional problems.

CONCLUSION

Nail changes occur more frequently than previous studies have shown. Furthermore, our study indicates that the nail changes are affecting a large proportion of the patients, both cosmetically and functionally, which may lead to a decrease in their quality of life. No significant association was found according to the possible relation between nail changes and fungal infection.

Taxane-induced nail changes: incidence, clinical presentation and outcome

The clinical characteristics of nail changes in seven patients receiving taxane-containing chemotherapy are described. They include nail pigmentation, subungual hematoma, Beau's lines and onycholysis and subungual suppuration. The incidence of such changes (ranging from 0% to 44%) is reviewed from a Medline search of the literature.

Docetaxel-induced nail dystrophy

A 73-year-old man with metastatic prostate cancer treated with weekly docetaxel chemotherapy for 5 months developed an acute nail dystrophy restricted to the fingernails. This was characterized by onycholysis, subungual haemorrhage and acute paronychia, progressing to a subungual abscess of the right index finger. Nail bed hyperaemia and haemosiderin-like nail bed discoloration were present. Nail plate avulsion was performed to decompress the acutely painful subungual abscess. The right thumb, middle finger and left index finger demonstrated early, proximal white subungual collections of pus obscuring the lunula (onychophosis). Central nail plate fenestrations with a surgical drill led to exudation of purulent material. Cultures of the subungual abscess material yielded mixed organisms, possibly related to administration of flucloxacillin for 1 week prior to presentation. The patient completed a further two courses of docetaxel without sequelae, and the nail dystrophy appears to be resolving. Docetaxel-induced nail changes are a common adverse effect, occurring in 30-40% of patients. Mild changes do not usually warrant the discontinuation of treatment.

Onycholysis as a complication of systemic chemotherapy: report of five cases associated with prolonged weekly paclitaxel therapy and review of the literature

BACKGROUND

Onycholysis has been reported in association with the use of several noncytotoxic drugs and with chemotherapy in 135 patients. Onycholysis may be precipitated by exposure to ultraviolet radiation.

METHODS

The authors studied 91 patients who received paclitaxel and 187 patients who received doxorubicin.

RESULTS

Onycholysis occurred in 5 of 21 patients who received > 6 courses of weekly paclitaxel, developing in the summer months in all 5 patients. It did not occur in patients who received fewer weekly paclitaxel courses or those who were treated every 3 weeks. Onycholysis did not occur in 187 patients who received doxorubicin. Review of the literature revealed that onycholysis is nearly exclusively associated with anthracycline and taxane therapy.

CONCLUSIONS

Prolonged weekly paclitaxel, other taxanes, and anthracyclines cause onycholysis in some patients, which may be precipitated by exposure to sunlight. Patients receiving these drugs should protect their nails from sunlight.