Predictors of Increases in Alcohol Problems and Alcohol Use Disorders in Offspring in the San Diego Prospective Study

High prevalence of alcohol use disorders in 454 young adult offspring from the San Diego prospective study

BACKGROUND

Preliminary evaluations of 212 drinking offspring from the San Diego Prospective Study (SDPD) indicated that over 50% developed alcohol use disorder (AUD) by their mid-20s. The present analysis evaluated if those findings remained robust when the group increased to 454 individuals, a sample size that facilitated a search for potential contributors to the high AUD prevalence.

METHODS

Semistructured interviews were used to evaluate lifetime AUD diagnoses in 224 daughters and 230 sons from the SDPS (N = 454) by mean age 26. Analyses compared participants with and without AUD regarding demography, alcohol use, personality, and psychiatric diagnoses. Characteristics associated with AUD were entered together in a backward elimination regression analysis, and the results were entered in a structural equation model (SEM) to evaluate potential mediation of risks for alcohol problems.

RESULTS

Lifetime AUD was documented for 61% of the sons and 41% of the daughters. Offspring with AUD reported averages of 13 maximum and five usual drinks per occasion and endorsed an average of 4 DSM AUD criteria. Even after considering personality characteristics, family AUD histories, and personal psychiatric histories, significant contributions to the regression analysis were limited to lower levels of response to alcohol, higher positive alcohol expectancies, and drinking to cope. Key elements of the hypothesized SEM were supported, and mediation between the low alcohol response and the number of alcohol problems was documented for expectancies, drinking to cope, and peer heavier drinking.

CONCLUSION

The results support prior high AUD rates in SDPS offspring and demonstrate that the AUD diagnoses were associated with robust alcohol intake and problems. The data also indicated mediation of the impact of the low alcohol response on the development of AUD through several characteristics proposed by prior work in other populations.

Does tolerance to ethanol-induced ataxia explain the sensitized response to ethanol?

Under conditions of repeated exposure to ethanol, a sensitized locomotor stimulant response develops in some strains of mice. It has been hypothesized that the sensitized response is a consequence of tolerance development to the sedative/incoordinating effects of ethanol. Conversely, ethanol-induced sensitization and tolerance may be independent effects of repeated ethanol exposure. A published study in C57BL/6J by DBA/2J recombinant inbred strains concluded that the two phenomena are not genetically related and thus perhaps mechanistically distinct. To extend evaluation beyond the genetic variance found in C57BL/6J and DBA/2J mice and examine phenotypic associations, we simultaneously measured ethanol-induced sensitization and tolerance in a genetically diverse panel of 15 standard inbred mouse strains and a genetically heterogeneous stock that was produced by the intercrossing of eight inbred mouse strains. Changes in activity counts and ataxia ratio across repeated ethanol treatments indexed sensitization and tolerance, respectively. Photocell beam breaks provided the measure of activity, and foot slip errors corrected for activity in a grid test provided a measure of coordination. The results were strain and individual dependent. The genetic correlation between magnitude of sensitization and tolerance was not significant in the panel of inbred strains, but when individual data were correlated, without regard to strain, there was a significant correlation. This relationship was also significant in the genetically heterogeneous population of mice. However, magnitude of tolerance explained only 10% of the variance in sensitization among individuals of the inbred strain population, whereas it explained 44% of the variance among individuals of the eight-strain cross. When repeated exposures to ethanol were disassociated from the test apparatus, this relationship in the eight-strain cross disappeared. Furthermore, days to peak sensitization and tolerance across days did not perfectly mirror each other. Overall, our data do not support shared genetic mechanisms in sensitization and tolerance development but suggest a partial relationship among individuals that could be related to drug-environment associations.

Helping families heal in substance use treatment: A qualitative study about the role of peer support specialists with client families

INTRODUCTION

Peer support specialists (PSS) are people with previous psychiatric illness or substance use disorders who use their experience to support those facing similar hardships. PSS offer a range of beneficial outcomes to both the PSS and clients. The most immediate social connections to those seeking treatment are often their families, yet no PSS studies are inclusive of family involvement. Strong theoretical and empirical support exists for family involvement in addiction treatment, but no studies to date on families in substance use treatment include PSS. This study offers a first look at PSS's experiences with client families. We aimed to describe experiences and attitudes of PSS in working with families of those seeking substance use treatment.

METHODS

This qualitative study included 25 adult PSS with at least 1 year of work experience in substance use treatment and state credentialing board certification. Participants had one interview either in a focus group format or individually. The recruitment and data collection phase lasted from November 2020 to June 2021. The semi-structured interview protocol included six main questions and interviews lasted 60 to 75 min. Upon completion of each interview, the recordings were transcribed and inductively coded. Thematic analysis of the codes identified overarching themes and their implications were described with associated quotes.

RESULTS

Thematic analysis generated three interrelated themes. First, participants described the various ways they often work with the families of their clients, which seemed to be dependent on the age of the client. Second, participants identified the negative aspects of working with families such as family drama, stress, and co-dependency issues. Last, the third theme identified the ways in which PSS assist families in healing from the effects of addiction. The themes identify a complicated and conflicting approach to work with families. Overall, it seemed PSS were operating on their own experiences or suggestions given by supervisors to guide them with no training on how to approach families.

CONCLUSIONS

This study highlights a deficit in PSS training on their role with families, family intervention, and the impact of family on substance use treatment for adults and youth. More research needs to establish the PSS role with families and with clients from marginalized backgrounds. Credentialing and national associations that support PSS should develop additional training and education opportunities related to working with families for PSS, supervisors, and organizational leadership who employ PSS for substance use treatment.

Subjective response to alcohol in young adults with bipolar disorder and recent alcohol use: a within-subject randomized placebo-controlled alcohol administration study

Limited data exists on mechanisms contributing to elevated risk for alcohol use disorder (AUD) in bipolar disorder. Variation in subjective response to alcohol may relate to alcohol use and risk for AUD. This study used a randomized, placebo-controlled, cross-over, within-subjects design to investigate differences in subjective response to alcohol in 50 euthymic young adults (n = 24 with and n = 26 without bipolar disorder type I). Eighty-three percent of participants with bipolar disorder were medicated. Participants completed assessments of clinical history, alcohol expectancies, and recent alcohol use. Participants were dosed to a .08 g% breath alcohol concentration. The placebo condition occurred on a separate counter-balanced day. Subjective response to alcohol was investigated at similar time points during both conditions. Group, condition, and group-by-condition interactions were modeled, with condition and time of subjective response assessment as repeated within-subject variables, and subjective response to alcohol as the dependent variable. Greater stimulating effects and liking of alcohol were reported in people with bipolar disorder (group-by-condition interactions, p < .05) than healthy young adults. While young adults with bipolar disorder reported anticipating feeling less "mellow/relaxed" when drinking (p = .02), during both beverage conditions they reported feeling more "mellow/relaxed" (main effect of group, p = .006). Feeling more "mellow/relaxed" during the alcohol condition related to greater recent alcohol use in bipolar disorder (p = .001). Exploratory analyses suggested anticonvulsants and sedatives/antihistamines may relate to differences in subjective response to alcohol in bipolar disorder. Results suggest young adults with bipolar disorder may differ in alcohol expectancies and experience alcohol intoxication differently-with distinct relations between subjective response to alcohol and alcohol use-compared to healthy young adults.

The BDNF Val68Met polymorphism causes a sex specific alcohol preference over social interaction and also acute tolerance to the anxiolytic effects of alcohol, a phenotype driven by malfunction of BDNF in the ventral hippocampus of male mice

BACKGROUND

The brain-derived neurotrophic factor (BDNF) Valine 66 to Methionine human polymorphism results in impaired activity-dependent BDNF release and has been linked to psychiatric disorders including depression and anxiety. We previously showed that male knock-in mice carrying the mouse Methionine homolog (Met68BDNF) exhibit excessive and compulsive alcohol drinking behaviors as compared to the wild-type Val68BDNF mice.

OBJECTIVE

Here, we set out to determine the potential mechanism for the heightened and compulsive alcohol drinking phenotypes detected in Met68BDNF mice.

RESULTS

We found that male, but not female Met68BDNF mice exhibit social anxiety-like behaviors. We further show that male Met68BDNF mice exhibit a preference for alcohol over social interaction. In contrast, alcohol place preference without an alternative social reward, is similar in male Met68BDNF and Val68BDNF mice. Since the Met68BDNF mice show social anxiety phenotypes, we tested whether alcohol reliefs anxiety similarly in Met68BDNF and Val68BDNF mice and found that male, but not female Met68BDNF mice are insensitive to the acute anxiolytic action of alcohol. Finally, we show that this acute tolerance to alcohol-dependent anxiolysis can be restored by overexpressing wild-type Val68BDNF in the ventral hippocampus (vHC) of Met68BDNF mice.

CONCLUSIONS

Together, our results suggest that excessive alcohol drinking in the Met68BDNF may be attributed, in part, to heighted social anxiety and a lack of alcohol-dependent anxiolysis, a phenotype that is associated with malfunction of BDNF signaling in the vHC of male Met68BDNF mice.

Cross-sectional and prospective associations of drinking characteristics with scores from the Self-Report of the Effects of Alcohol questionnaire and findings from alcohol challenges

BACKGROUND

Data from 2 generations of participants in the San Diego Prospective Study (SDPS) were used to compare cross-sectional and prospective relationships of 5 measures of the low level of response (low LR) to alcohol to 2 key alcohol-related outcomes.

METHODS

The analyses used data from 373 SDPS male probands and 158 male and female offspring of these individuals to evaluate relationships of 5 LR measures to the prior 5-year maximum drinks per occasion and the number of 11 DSM-IV alcohol use disorder (AUD) criteria experienced. Probands' LR measures included responses to alcohol challenges administered 15 years previously, and ratings for both generations included measures of the number of standard drinks during four periods: the first five times of drinking (SRE-5), the prior three drinking months (SRE-3), the period of heaviest drinking (SRE-H), and a total average across all time frames (SRE-T). Analyses included zero-order correlations, correlations using covariates, and hierarchical multiple regression analyses.

RESULTS

All 5 LR measures were correlated with aspects of maximum drinks and the number of AUD criteria, but the most robust results were seen for SRE-3 and maximum drinks. Correlations were less consistent for SRE-5, a measure more closely related to outcomes in the offspring. Hierarchical regression analyses supported most of these conclusions and showed that alcohol challenge-based LRs added significant information regarding maximum drinks even when evaluated with SRE values. The close correlation between SRE-H and SRE-T argues against the need for studies to include both measures. The patterns of results were similar irrespective of whether covariates were included.

CONCLUSIONS

There were significant correlations of maximum drinks and the number of AUD criteria with findings from prior alcohol challenges and all SRE scores. Challenges and SRE reports are related but not identical LR measures. All SRE scores, including SRE-5, offered useful information regarding subsequent drinking behavior.

Endorsement of specific alcohol use disorder criterion items changes with age in individuals with persistent alcohol use disorders in 2 generations of the San Diego Prospective Study

BACKGROUND

Diagnostic and Statistical Manual (DSM) alcohol use disorder (AUD) criteria are written in broad enough terms to apply to diverse populations. The current analyses evaluate whether the endorsement of criteria changes with increasing age in individuals with persistent AUDs.

METHODS

Data regarding AUDs persisting across 3 timepoints between average ages of 31 and 43 were gathered about every 5 years from 318 interviews for 106 San Diego Prospective Study (SDPS) AUD male probands. Similar data regarding persistent AUDs across 2 timepoints were obtained from 136 interviews with 68 SDPS AUD offspring between average ages of 21 and 27. Changes in the endorsement of each AUD criterion were evaluated using Cochran's Q test.

RESULTS

For AUD probands across time, significant decreases were observed in the proportions endorsing 4 criteria (tolerance, withdrawal, failure to fulfill obligations, and using alcohol in hazardous situations). Increased rates of endorsement were documented for 3 criteria (drinking alcohol in higher amounts or for longer periods of time, spending a great deal of time regarding alcohol, and continued use despite social or interpersonal problems). Significant increases in rates of endorsements for offspring were seen for spending a great deal of time regarding alcohol and giving up or reducing important activities in order to drink.

CONCLUSIONS

These data indicate that the salience of many DSM AUD criterion items changed significantly with age in both SDPS generations among individuals with persistent AUDs. The current results support the need for additional systematic research to determine whether specific criterion items might need to be weighted differently in evaluating older and younger individuals with persistent AUDs.

Characteristics associated with denial of problem drinking among two generations of individuals with alcohol use disorders

BACKGROUND

Denial of an overarching alcohol problem despite endorsement of specific alcohol-related difficulties may be central to development and continuation of alcohol use disorders (AUDs). However, there is limited information about which characteristics of drinkers and which drinking problems relate most closely to that denial.

METHODS

Using data from two generations of the San Diego Prospective Study (SDPS), we compared AUD subjects who considered themselves non-problematic drinkers (Group 1) with those with AUDs who acknowledged a general alcohol problem (Group 2). Comparisons included demography, alcohol-related patterns and problems, drug use, as well as impulsivity and sensation seeking. Variables were first evaluated as univariate characteristics after which significant group differences were entered in logistic regression analyses.

RESULTS

Sixty-seven percent of 94 AUD probands and 82 % of 176 AUD offspring reported themselves as light or moderate social drinkers despite averages of up to 12 maximum drinks per occasion and four DSM problems. Regression analyses indicated deniers evidenced less intense alcohol and drug-related problems and identified DSM-IV criterion items that they were most likely to deny.

CONCLUSIONS

A large majority of two generations of SDPS participants whose interviews indicated a current AUD did not characterize themselves as problem drinkers. Despite drinking amounts that far exceeded healthy limits and admitting to important life problems with alcohol, these individuals give misleading answers regarding their condition when asked general questions about drinking by health care deliverers. The authors offer suggestions regarding how to identify those drinkers in need of advice regarding dangers of their behaviors.

The Search for Contributors to Low Rates of Recognition of Paternal Alcohol Use Disorders in Offspring From the San Diego Prospective Study

BACKGROUND

The most efficient approach for establishing family histories (FHs) asks informants about disorders in their relatives (a Family History Method [FHM]). However, FHMs underestimate family diagnoses. We evaluated if accuracies of young adult offspring report of their father's alcohol use disorders (AUDs) related to the age, sex, education, and/or substance-related patterns/problems of either the young adult informants or their AUD fathers.

METHODS

Data from the San Diego Prospective Study (SDPS), a multigenerational 35-year investigation, compared father/offspring pairs where the proband father's alcohol problems were correctly (Group 1) or incorrectly (Group 2) noted by offspring. In the key analysis, Group 1 versus 2 results were entered into bootstrapped backward logistic regression analyses predicting Group 1 membership.

RESULTS

Five proband and one offspring characteristic were associated with correct identification of their father's alcohol problems. None of these related to age, education, or sex. Characteristics associated with correct FHM diagnoses included the father's FH of AUDs, self-report of drinking despite social/interpersonal or physical/psychological alcohol-related problems, spending much time related to alcohol, and his having a religious preference. The single offspring item predicting correct identification of the father's problems was the number of DSM alcohol problems of the offspring.

CONCLUSIONS

In the SDPS, FHM sensitivity was most closely related to the father's drinking characteristics, not the offspring characteristics. While unique aspects of SDPS families potentially limit generalizability of results, the data demonstrate how the FHM can offer important initial steps in the search for genetically related AUD risks in a subset of families.

Interactions Between Alcohol and the Endocannabinoid System

Endocannabinoids are lipid mediators that interact with the same cannabinoid receptors that recognize Δ⁹ -tetrahydrocannabinol (THC), the psychoactive constituent of marijuana, to induce similar effects in the brain and periphery. Alcohol and THC are both addictive substances whose acute use elicits rewarding effects that can lead to chronic and compulsive use via engaging similar signaling pathways in the brain. In the liver, both alcohol and endocannabinoids activate lipogenic gene expression leading to fatty liver disease. This review focuses on evidence accumulated over the last 2 decades to indicate that both the addictive neural effects of ethanol and its organ toxic effects in the liver and elsewhere are mediated, to a large extent, by endocannabinoids signaling via cannabinoid-1 receptors (CB₁ R). The therapeutic potential of CB₁ R blockade globally or in peripheral tissues only is also discussed.