Treatment adherence - room for improvement, not only in autoimmune hepatitis

COVID-19 emergency: Changes in quality of life perception in patients with chronic liver disease-An Italian single-centre study

BACKGROUND

In December 2019, the coronavirus disease-2019 (COVID-19) emerged and rapidly spread worldwide, becoming a global health threat and having a tremendous impact on the quality of life (QOL) of individuals.

AIM

To evaluate the awareness of patients with chronic liver disease (CLD) regarding the COVID-19 emergency and how it impacted on their QOL.

METHODS

Patients with an established diagnosis of CLD (cirrhosis, autoimmune hepatitis, primary biliary cholangitis, and primary sclerosing cholangitis) who had been evaluated at our Outpatient Liver Disease Clinic during the 6-mo period preceding the start of Italian lockdown (March 8, 2020) were enrolled. Participants were asked to complete a two-part questionnaire, administered by telephone according to governmental restrictions: The first section assessed patients’ basic knowledge regarding COVID-19, and the second evaluated the impact of the COVID-19 emergency on their QOL. We used the Italian version of the CLD questionnaire (CLDQ-I). With the aim of evaluating possible changes in the QOL items addressed, the questionnaire was administered to patients at the time of telephone contact with the specific request to recall their QOL perceptions during two different time points. In detail, patients were asked to recall these perceptions first during time 0 (t0), a period comprising the 2 wk preceding the date of ministerial lockdown decree (from February 23 to March 7, 2020); then, in the course of the same phone call, they were asked to recall the same items as experienced throughout time 1 (t1), the second predetermined time frame encompassing the 2 wk (from April 6 to April 19) preceding our telephone contact and questionnaire administration. All data are expressed as number (%), and continuous variables are reported as the median (interquartile range). The data were compared using the Wilcoxon paired non-parametric test.

RESULTS

A total of 111 patients were enrolled, of whom 81 completed the questionnaire. Forty-nine had liver cirrhosis, and all of them had compensated disease; 32 patients had autoimmune liver disease. The majority (93.8%) of patients were aware of COVID-19 transmission modalities and on how to recognize the most common alarm symptoms (93.8%). Five of 32 (15.6%) patients with autoimmune liver disease reported having had the need to receive more information about the way to manage their liver disease therapy during lockdown and nine (28.2%) thought about modifying their therapy without consulting their liver disease specialist. About the impact on QOL, all CLDQ-I total scores were significantly worsened during time t1 as compared to time t0.

CONCLUSION

The COVID-19 epidemic has had a significant impact on the QOL of our population of patients, despite a good knowledge of preventive measure and means of virus transmission.

Towards personalised medicine in autoimmune hepatitis: Measurement of thiopurine metabolites results in higher biochemical response rates

BACKGROUND & AIMS

Patients with autoimmune hepatitis (AIH) usually receive maintenance therapy with thiopurines, such as azathioprine (AZA) or mercaptopurine. Genetic polymorphisms in AZA metabolism can lead to variations in thioguanine nucleotide (TGN) and 6-methylmercaptopurine, both of which can cause adverse drug reactions (ADRs). In inflammatory bowel disease, a therapeutic TGN range (225-450 pmol/8x10⁸ erythrocytes) has been identified to optimise effectiveness. We evaluated the benefits of a personalised medicine approach to thiopurine dosing, in comparison to standard weight-based dosing.

METHODS

A retrospective matched cohort study of 214 patients with AIH who were seen at King's College between 1999-2019 was performed. Metabolite levels were measured in 109 patients. The control group included 105 patients on weight-based thiopurine dosing with no metabolite monitoring.

RESULTS

Biochemical response (BR) occurred more frequently at 6-month follow-up in patients with metabolite monitoring compared to those on a weight-based regimen (77% vs. 60%, p = 0.008). This remained true with data analysis based on clinicians who measure metabolites and those who do not (BR at 6 months: 84% vs. 64%, p = 0.016). Patients with BR had TGN levels within the therapeutic range of 225-450 pmol/8x10⁸ erythrocytes significantly more often than those who failed to achieve or lost BR (40% vs. 13%, p <0.0001). Moreover, TGN levels within the pre-defined therapeutic range predicted more stable disease within 6 months of testing compared to levels outside the range (p <0.0001). A high proportion of patients with sub-therapeutic TGN levels (75-225 pmol/8x10⁸ erythrocytes) remained in BR (75% vs. 81%, p = 0.589) with fewer ADRs (44% vs. 86%, p = 0.0002) when compared to patients with therapeutic TGN levels.

CONCLUSION

A strategy of personalised medicine using metabolite levels can optimise treatment regimens in AIH, resulting in fewer ADRs whilst maintaining BR.

LAY SUMMARY

This study looked to see if measuring the breakdown products of a medication used in autoimmune hepatitis increases the chances of gaining good control of the disease, when compared to a group of patients who were on a dose of this medication based on their weight. A group of 214 patients with autoimmune hepatitis were split into 2 groups: roughly half had their medication dose adjusted according to measurements of breakdown products in the blood, whilst the other half received their weight-based dose as normal. The results confirmed that using a personalised approach and checking drug breakdown products resulted in fewer side effects and potentially improved control of disease.