Unintended changes in cognition, mood, and behavior arising from cell-based interventions for neurological conditions: ethical challenges

The prospect of using cell-based interventions (CBIs) to treat neurological conditions raises several important ethical and policy questions. In this target article, we focus on issues related to the unique constellation of traits that characterize CBIs targeted at the central nervous system. In particular, there is at least a theoretical prospect that these cells will alter the recipients' cognition, mood, and behavior-brain functions that are central to our concept of the self. The potential for such changes, although perhaps remote, is cause for concern and careful ethical analysis. Both to enable better informed consent in the future and as an end in itself, we argue that early human trials of CBIs for neurological conditions must monitor subjects for changes in cognition, mood, and behavior; further, we recommend concrete steps for that monitoring. Such steps will help better characterize the potential risks and benefits of CBIs as they are tested and potentially used for treatment.

Psychiatric and neuropsychiatric adverse events associated with deep brain stimulation: A meta-analysis of ten years' experience

Deep brain stimulation (DBS) has been approved by the FDA for use in the treatment of Parkinson's disease, essential tremor, and dystonia. Case reports and case series have reported significant psychiatric side effects in some individuals. The goal of this meta-analysis is to characterize the risks and benefits of DBS and to assess its possible use within the psychiatric setting. A search was conducted on PubMed, EBSCO, and PsycInfo in January 2006 that covered the time period 1 Jan 1996-30 Dec 2005. All identified articles were reviewed and those describing adverse events were further examined with a structured instrument. The initial searches yielded 2667 citations; 808 articles met inclusion criteria for the meta-analysis; 98.2% of studies that specifically assessed motor function reported some level of improvement. Most reported side effects were device or procedure related (e.g., infection and lead fracture). The prevalence of depression was 2-4%, mania 0.9-1.7%, emotional changes 0.1-0.2%, and the prevalence of suicidal ideation/suicide attempt was 0.3-0.7%. The completed suicide rate was 0.16-0.32%. In conclusion, DBS is an effective treatment for Parkinson's disease, dystonia, and essential tremor, and case reports suggest that major depression and OCD may also respond to DBS. Reported rates of depression, cognitive impairment, mania, and behavior change are low, but there is a high rate of suicide in patients treated with DBS, particularly with thalamic and GPi stimulation. Because of the high suicide rate, patients should be prescreened for suicide risk prior to DBS surgery. Additionally, patients should be monitored closely for suicidal behavior post-operatively.

Is patients' preferred involvement in health decisions related to outcomes for patients with HIV?

BACKGROUND

Previous studies suggest that patients who are more involved in their medical care have better outcomes.

OBJECTIVES

We sought to compare health care processes and outcomes for patients with HIV based on their preferred level of involvement in health decisions.

DESIGN

Cross-sectional analysis of audio computer-assisted interviews with patients at an urban HIV clinic.

PATIENTS

One thousand and twenty-seven patients awaiting an appointment with their primary care provider.

MEASURES

Patients were asked how they preferred to be involved in decisions (doctor makes most or all decisions, doctor and patient share decisions, patient makes all decisions). We also asked patients to rate the quality of communication with their HIV provider, and their self-reported receipt of and adherence to HAART.

RESULTS

Overall, 23% patients preferred that their doctor make all or most decisions, 63% preferred to share decisions with their doctor, and 13% preferred to make all final decisions alone. Compared to patients who prefer to share decisions with their HIV provider, patients who prefer that their provider make all/most decisions were significantly less likely to adhere to HAART (OR [odds ratio] 0.57, 95% CI 0.38-0.86) and patients who preferred to make decisions alone were significantly less likely to receive HAART or to have undetectable HIV RNA in unadjusted analyses (OR 0.52, 95% CI 0.31-0.87 for receipt of HAART; OR 0.64, 95% CI 0.44-0.95 for undetectable HIV RNA). After controlling for potentially confounding patient characteristics and differences in patient ratings of communication quality, patients who preferred that their provider make all/most decisions remained significantly less likely to adhere to HAART (OR 0.58, 95% CI 0.38-0.89); however, the associations with receipt of HAART and undetectable HIV RNA were no longer significant (OR 0.60, 95% CI 0.34-1.05 for receipt of HAART; OR 0.80, 95% C.I 0.53-1.20 for undetectable HIV RNA).

CONCLUSIONS

Although previous research suggests that more patient involvement in health care decisions is better, this benefit may be reduced when the patient wants to make decisions alone. Future research should explore the extent to which this preference is modifiable so as to improve outcomes.

What does 'respect' mean? Exploring the moral obligation of health professionals to respect patients

Respect is frequently invoked as an integral aspect of ethics and professionalism in medicine, yet it is often unclear what respect means in this setting. While we recognize that there are many reasonable ways to think about and use the term 'respect', in this paper, we develop a conception of respect that imposes a distinct moral duty on physicians. We are concerned mainly with the idea of respect for persons, or more specifically, respect for patients as persons. We develop an account of respect as recognition of the unconditional value of patients as persons. Such respect involves respecting the autonomy of patients, but we challenge the idea that respect for autonomy is a complete or self-sufficient expression of respect for persons. Furthermore, we suggest that the type of respect that physicians owe to patients is independent of a patient's personal characteristics, and therefore, ought to be accorded equally to all. Finally, the respect that we promote has both a cognitive dimension (believing that patients have value) and a behavioral dimension (acting in accordance with this belief).

Can patient-centered attitudes reduce racial and ethnic disparities in care?

PURPOSE

Patient-centeredness has been advocated to reduce racial/ethnic disparities in health care quality, but no empirical data support such a connection. The authors' purpose was to determine whether students with patient-centered attitudes have better performance and are less likely to demonstrate disparities with African American compared with white standardized patients (SPs).

METHOD

Third-year medical students were assessed by SPs at the Clinical Educational Center of the Johns Hopkins University School of Medicine in 2002. One African American and one white actor were trained as SPs for each of four case scenarios; students were randomly assigned to interact with either SP for each case. Before the exam, students were surveyed about their attitudes towards patient-centered medicine. Students with and without patient-centered attitudes were compared with regard to their performance with African American and white SPs. Outcome measures were student exam scores in interpersonal skill, history taking, physical exam, and counseling.

RESULTS

All 177 of eligible students participated in all four case scenarios. With white SPs, students with patient-centered attitudes performed similarly to students without patient-centered attitudes in all four areas. However, with African American SPs, students with patient-centered attitudes performed significantly better than students without patient-centered attitudes in interpersonal skills (71.4 versus 69.4, P = .010), history taking (63.8 versus 61.1, P = .003), and counseling (92.1 versus 88.7, P = .002) and not significantly different in physical exam performance (73.6 versus 68.6, P = .311).

CONCLUSIONS

Patient-centered attitudes may be more important in improving physician behaviors with African American patients than with white patients and may, therefore, play a role in reducing disparities.

Planning for an Influenza Pandemic: Social Justice and Disadvantaged Groups

Because an influenza pandemic would create the most serious hardships for those who already face most serious hardships, countries should take special measures to mitigate the effect of a pandemic on existing social inequalities. Unfortunately, there is little evidence that anybody is thinking about that.

Are physicians' attitudes of respect accurately perceived by patients and associated with more positive communication behaviors?

OBJECTIVE

To explore the domain of physician-reported respect for individual patients by investigating the following questions: How variable is physician-reported respect for patients? What patient characteristics are associated with greater physician-reported respect? Do patients accurately perceive levels of physician respect? Are there specific communication behaviors associated with physician-reported respect for patients?

METHODS

We audiotaped 215 patient-physician encounters with 30 different physicians in primary care. After each encounter, the physician rated the level of respect that s/he had for that patient using the following item: "Compared to other patients, I have a great deal of respect for this patient" on a five-point scale between strongly agree and strongly disagree. Patients completed a post-visit questionnaire that included a parallel respect item: "This doctor has a great deal of respect for me." Audiotapes of the patient visits were analyzed using the Roter Interaction Analysis System (RIAS) to characterize communication behaviors. Outcome variables included four physician communication behaviors: information-giving, rapport-building, global affect, and verbal dominance. A linear mixed effects modeling approach that accounts for clustering of patients within physicians was used to compare varying levels of physician-reported respect for patients with physician communication behaviors and patient perceptions of being respected.

RESULTS

: Physician-reported respect varied across patients. Physicians strongly agreed that they had a great deal of respect for 73 patients (34%), agreed for 96 patients (45%) and were either neutral or disagreed for 46 patients (21%). Physicians reported higher levels of respect for older patients and for patients they knew well. The level of respect that physicians reported for individual patients was not significantly associated with that patient's gender, race, education, or health status; was not associated with the physician's gender, race, or number of years in practice; and was not associated with race concordance between patient and physician. While 45% of patients overestimated physician respect, 38% reported respect precisely as rated by the physician, and 16% underestimated physician respect (r=0.18, p=0.007). Those who were the least respected by their physician were the least likely to perceive themselves as being highly respected; only 36% of the least respected patients compared to 59% and 61% of the highly and moderately respected patients perceived themselves to be highly respected (p=0.012). Compared with the least-respected patients, physicians were more affectively positive with highly respected patients (p=0.034) and provided more information to highly and moderately respected patients (p=0.018).

CONCLUSION

Physicians' ratings of respect vary across patients and are primarily associated with familiarity rather than sociodemographic characteristics. Patients are able to perceive when they are respected by their physicians, although when they are not accurate, they tend to overestimate physician respect. Physicians who are more respectful towards particular patients provide more information and express more positive affect in visits with those patients.

PRACTICE IMPLICATIONS

Physician respectful attitudes may be important to target in improving communication with patients.

The moral nature of patient-centeredness: is it "just the right thing to do"?

OBJECTIVE

Patient-centeredness is regarded as an important feature of high quality patient care, but little effort has been devoted to grounding patient-centeredness as an explicitly moral concept. We sought to describe the moral commitments that underlie patient-centered care.

METHODS

We analyzed the key ideas that are commonly described in the literature on patient-centeredness in the context of three major schools of ethical thought.

RESULTS

Consequentialist moral theories focus on the positive outcomes of providing patient-centered care. Deontological theories emphasize how patient-centered care reflects the ethical norms inherent in medicine, such as respect for persons and shared decision-making. Virtue-based theories highlight the importance of developing patient-centered attitudes and traits, which in turn influence physicians' behaviors toward their patients.

CONCLUSION

Different ethical theories concentrate on different features of patient-centered care, but all can agree that patient-centeredness is morally valuable.

PRACTICE IMPLICATIONS

In order to sustain patient-centeredness as a moral concept, practitioners and students ought to examine these ideas to determine what their own personal reasons are for or against adopting a patient-centered approach.

Do patients treated with dignity report higher satisfaction, adherence, and receipt of preventive care?

PURPOSE

Although involving patients in their own health care is known to be associated with improved outcomes, this study was conducted to determine whether respecting persons more broadly, such as treating them with dignity, has additional positive effects.

METHODS

Using data from the Commonwealth Fund 2001 Health Care Quality Survey of 6,722 adults living in the United States, we performed survey-weighted logistic regression analysis to evaluate independent associations between 2 measures of respect (involvement in decisions and treatment with dignity) and patient outcomes (satisfaction, adherence, and receipt of optimal preventive care). Then we calculated adjusted probabilities of these outcomes and performed stratified analyses to examine results across racial/ethnic groups.

RESULTS

After adjustment for respondents' demographic characteristics, the probability of reporting a high level of satisfaction was higher for those treated with dignity vs not treated with dignity (0.70 vs 0.38, P < .001) and for those involved in, versus not involved in, decisions (0.70 vs 0.39, P < .001). These associations were consistent across all racial/ethnic groups. Being involved in decisions was significantly associated with adherence for whites, whereas being treated with dignity was significantly associated with adherence for racial/ethnic minorities. The probability of receiving optimal preventive care was marginally greater for those treated with dignity (0.68 vs 0.63, P = .054), but did not differ with respect to involvement in decisions (0.67 vs 0.67, P = .95).

CONCLUSIONS

Being treated with dignity and being involved in decisions are independently associated with positive outcomes. Although involving patients in decisions is an important part of respecting patient autonomy, it is also important to respect patients more broadly by treating them with dignity.

Survival of free DNA encoding antibiotic resistance from transgenic maize and the transformation activity of DNA in ovine saliva, ovine rumen fluid and silage effluent

To assess the likelihood that the bla gene present in a transgenic maize line may transfer from plant material to the microflora associated with animal feeds, we have examined the survival of free DNA in maize silage effluent, ovine rumen fluid and ovine saliva. Plasmid DNA that had previously been exposed to freshly sampled ovine saliva was capable of transforming competent Escherichia coli cells to ampicillin resistance even after 24 h, implying that DNA released from the diet could provide a source of transforming DNA in the oral cavity of sheep. Although target DNA sequences could be amplified by polymerase chain reaction from plasmid DNA after a 30-min incubation in silage effluent and rumen contents, only short term biological activity, lasting less than 1 min, was observed in these environments, as shown by transformation to antibiotic resistance. These experiments were performed under in vitro conditions; therefore further studies are needed to elucidate the biological significance of free DNA in the rumen and oral cavities of sheep and in silage effluent.

Characterisation of a Rrhodobacter sphaeroides gene that encodes a product resembling Eescherichia coli cytochrome b(561) and R. sphaeroides cytochrome b(562)

Analysis of the photoactive yellow protein (pyp) gene region of Rhodobacter sphaeroides has revealed the presence of an additional open reading frame, orfD, that had not previously been identified. Here we report the location of this new gene and the predicted amino acid sequence of the encoded protein. The translation product resembles a group of small cytochrome b-like proteins, including Escherichia coli cytochrome b(561), R. sphaeroides cytochrome b(562), and two new cytochrome b(561)-like proteins identified using the E. coli genome sequence, for which functions have not yet been established. To determine OrfD function in R. sphaeroides, an orfD mutant was constructed. The OrfD mutant exhibited growth rates and yields very similar to those of the wild-type strain when grown under a variety of growth conditions. Respiration rates, reduced-minus-oxidised spectra and levels of photosynthetic complexes were also very similar in the two strains. Although the role of OrfD was therefore not determined here, we demonstrate that the orfD gene is expressed in R. sphaeroides under aerobic, semi-aerobic and photosynthetic growth conditions.